/* * xmlIO.c : implementation of the I/O interfaces used by the parser * * See Copyright for the status of this software. * * daniel@veillard.com * * 14 Nov 2000 ht - for VMS, truncated name of long functions to under 32 char */ #define IN_LIBXML #include "libxml.h" #include #include #ifdef HAVE_ERRNO_H #include #endif #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_STAT_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef LIBXML_ZLIB_ENABLED #include #endif #ifdef LIBXML_LZMA_ENABLED #error #include #endif #if defined(_WIN32) && !defined(__CYGWIN__) #define WIN32_LEAN_AND_MEAN #include #endif #if defined(_WIN32_WCE) #include /* for CP_UTF8 */ #endif #ifndef S_ISDIR # ifdef _S_ISDIR # define S_ISDIR(x) _S_ISDIR(x) # elif defined(S_IFDIR) # ifdef S_IFMT # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) # elif defined(_S_IFMT) # define S_ISDIR(m) (((m) & _S_IFMT) == S_IFDIR) # endif # endif #endif #include #include #include #include #include #include #include #include #ifdef LIBXML_CATALOG_ENABLED #include #endif #include #include "buf.h" #include "enc.h" /* #define VERBOSE_FAILURE */ /* #define DEBUG_EXTERNAL_ENTITIES */ /* #define DEBUG_INPUT */ #ifdef DEBUG_INPUT #define MINLEN 40 #else #define MINLEN 4000 #endif /* * Input I/O callback sets */ typedef struct _xmlInputCallback { xmlInputMatchCallback matchcallback; xmlInputOpenCallback opencallback; xmlInputReadCallback readcallback; xmlInputCloseCallback closecallback; } xmlInputCallback; #define MAX_INPUT_CALLBACK 15 static xmlInputCallback xmlInputCallbackTable[MAX_INPUT_CALLBACK]; static int xmlInputCallbackNr = 0; static int xmlInputCallbackInitialized = 0; #ifdef LIBXML_OUTPUT_ENABLED /* * Output I/O callback sets */ typedef struct _xmlOutputCallback { xmlOutputMatchCallback matchcallback; xmlOutputOpenCallback opencallback; xmlOutputWriteCallback writecallback; xmlOutputCloseCallback closecallback; } xmlOutputCallback; #define MAX_OUTPUT_CALLBACK 15 static xmlOutputCallback xmlOutputCallbackTable[MAX_OUTPUT_CALLBACK]; static int xmlOutputCallbackNr = 0; static int xmlOutputCallbackInitialized = 0; xmlOutputBufferPtr xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder); #endif /* LIBXML_OUTPUT_ENABLED */ /************************************************************************ * * * Tree memory error handler * * * ************************************************************************/ static const char *IOerr[] = { "Unknown IO error", /* UNKNOWN */ "Permission denied", /* EACCES */ "Resource temporarily unavailable",/* EAGAIN */ "Bad file descriptor", /* EBADF */ "Bad message", /* EBADMSG */ "Resource busy", /* EBUSY */ "Operation canceled", /* ECANCELED */ "No child processes", /* ECHILD */ "Resource deadlock avoided",/* EDEADLK */ "Domain error", /* EDOM */ "File exists", /* EEXIST */ "Bad address", /* EFAULT */ "File too large", /* EFBIG */ "Operation in progress", /* EINPROGRESS */ "Interrupted function call",/* EINTR */ "Invalid argument", /* EINVAL */ "Input/output error", /* EIO */ "Is a directory", /* EISDIR */ "Too many open files", /* EMFILE */ "Too many links", /* EMLINK */ "Inappropriate message buffer length",/* EMSGSIZE */ "Filename too long", /* ENAMETOOLONG */ "Too many open files in system",/* ENFILE */ "No such device", /* ENODEV */ "No such file or directory",/* ENOENT */ "Exec format error", /* ENOEXEC */ "No locks available", /* ENOLCK */ "Not enough space", /* ENOMEM */ "No space left on device", /* ENOSPC */ "Function not implemented", /* ENOSYS */ "Not a directory", /* ENOTDIR */ "Directory not empty", /* ENOTEMPTY */ "Not supported", /* ENOTSUP */ "Inappropriate I/O control operation",/* ENOTTY */ "No such device or address",/* ENXIO */ "Operation not permitted", /* EPERM */ "Broken pipe", /* EPIPE */ "Result too large", /* ERANGE */ "Read-only file system", /* EROFS */ "Invalid seek", /* ESPIPE */ "No such process", /* ESRCH */ "Operation timed out", /* ETIMEDOUT */ "Improper link", /* EXDEV */ "Attempt to load network entity %s", /* XML_IO_NETWORK_ATTEMPT */ "encoder error", /* XML_IO_ENCODER */ "flush error", "write error", "no input", "buffer full", "loading error", "not a socket", /* ENOTSOCK */ "already connected", /* EISCONN */ "connection refused", /* ECONNREFUSED */ "unreachable network", /* ENETUNREACH */ "address in use", /* EADDRINUSE */ "already in use", /* EALREADY */ "unknown address family", /* EAFNOSUPPORT */ }; #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) /** * __xmlIOWin32UTF8ToWChar: * @u8String: uft-8 string * * Convert a string from utf-8 to wchar (WINDOWS ONLY!) */ static wchar_t * __xmlIOWin32UTF8ToWChar(const char *u8String) { wchar_t *wString = NULL; if (u8String) { int wLen = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, u8String, -1, NULL, 0); if (wLen) { wString = xmlMalloc(wLen * sizeof(wchar_t)); if (wString) { if (MultiByteToWideChar (CP_UTF8, 0, u8String, -1, wString, wLen) == 0) { xmlFree(wString); wString = NULL; } } } } return wString; } #endif /** * xmlIOErrMemory: * @extra: extra information * * Handle an out of memory condition */ static void xmlIOErrMemory(const char *extra) { __xmlSimpleError(XML_FROM_IO, XML_ERR_NO_MEMORY, NULL, NULL, extra); } /** * __xmlIOErr: * @code: the error number * @ * @extra: extra information * * Handle an I/O error */ void __xmlIOErr(int domain, int code, const char *extra) { unsigned int idx; if (code == 0) { #ifdef HAVE_ERRNO_H if (errno == 0) code = 0; #ifdef EACCES else if (errno == EACCES) code = XML_IO_EACCES; #endif #ifdef EAGAIN else if (errno == EAGAIN) code = XML_IO_EAGAIN; #endif #ifdef EBADF else if (errno == EBADF) code = XML_IO_EBADF; #endif #ifdef EBADMSG else if (errno == EBADMSG) code = XML_IO_EBADMSG; #endif #ifdef EBUSY else if (errno == EBUSY) code = XML_IO_EBUSY; #endif #ifdef ECANCELED else if (errno == ECANCELED) code = XML_IO_ECANCELED; #endif #ifdef ECHILD else if (errno == ECHILD) code = XML_IO_ECHILD; #endif #ifdef EDEADLK else if (errno == EDEADLK) code = XML_IO_EDEADLK; #endif #ifdef EDOM else if (errno == EDOM) code = XML_IO_EDOM; #endif #ifdef EEXIST else if (errno == EEXIST) code = XML_IO_EEXIST; #endif #ifdef EFAULT else if (errno == EFAULT) code = XML_IO_EFAULT; #endif #ifdef EFBIG else if (errno == EFBIG) code = XML_IO_EFBIG; #endif #ifdef EINPROGRESS else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS; #endif #ifdef EINTR else if (errno == EINTR) code = XML_IO_EINTR; #endif #ifdef EINVAL else if (errno == EINVAL) code = XML_IO_EINVAL; #endif #ifdef EIO else if (errno == EIO) code = XML_IO_EIO; #endif #ifdef EISDIR else if (errno == EISDIR) code = XML_IO_EISDIR; #endif #ifdef EMFILE else if (errno == EMFILE) code = XML_IO_EMFILE; #endif #ifdef EMLINK else if (errno == EMLINK) code = XML_IO_EMLINK; #endif #ifdef EMSGSIZE else if (errno == EMSGSIZE) code = XML_IO_EMSGSIZE; #endif #ifdef ENAMETOOLONG else if (errno == ENAMETOOLONG) code = XML_IO_ENAMETOOLONG; #endif #ifdef ENFILE else if (errno == ENFILE) code = XML_IO_ENFILE; #endif #ifdef ENODEV else if (errno == ENODEV) code = XML_IO_ENODEV; #endif #ifdef ENOENT else if (errno == ENOENT) code = XML_IO_ENOENT; #endif #ifdef ENOEXEC else if (errno == ENOEXEC) code = XML_IO_ENOEXEC; #endif #ifdef ENOLCK else if (errno == ENOLCK) code = XML_IO_ENOLCK; #endif #ifdef ENOMEM else if (errno == ENOMEM) code = XML_IO_ENOMEM; #endif #ifdef ENOSPC else if (errno == ENOSPC) code = XML_IO_ENOSPC; #endif #ifdef ENOSYS else if (errno == ENOSYS) code = XML_IO_ENOSYS; #endif #ifdef ENOTDIR else if (errno == ENOTDIR) code = XML_IO_ENOTDIR; #endif #ifdef ENOTEMPTY else if (errno == ENOTEMPTY) code = XML_IO_ENOTEMPTY; #endif #ifdef ENOTSUP else if (errno == ENOTSUP) code = XML_IO_ENOTSUP; #endif #ifdef ENOTTY else if (errno == ENOTTY) code = XML_IO_ENOTTY; #endif #ifdef ENXIO else if (errno == ENXIO) code = XML_IO_ENXIO; #endif #ifdef EPERM else if (errno == EPERM) code = XML_IO_EPERM; #endif #ifdef EPIPE else if (errno == EPIPE) code = XML_IO_EPIPE; #endif #ifdef ERANGE else if (errno == ERANGE) code = XML_IO_ERANGE; #endif #ifdef EROFS else if (errno == EROFS) code = XML_IO_EROFS; #endif #ifdef ESPIPE else if (errno == ESPIPE) code = XML_IO_ESPIPE; #endif #ifdef ESRCH else if (errno == ESRCH) code = XML_IO_ESRCH; #endif #ifdef ETIMEDOUT else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT; #endif #ifdef EXDEV else if (errno == EXDEV) code = XML_IO_EXDEV; #endif #ifdef ENOTSOCK else if (errno == ENOTSOCK) code = XML_IO_ENOTSOCK; #endif #ifdef EISCONN else if (errno == EISCONN) code = XML_IO_EISCONN; #endif #ifdef ECONNREFUSED else if (errno == ECONNREFUSED) code = XML_IO_ECONNREFUSED; #endif #ifdef ETIMEDOUT else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT; #endif #ifdef ENETUNREACH else if (errno == ENETUNREACH) code = XML_IO_ENETUNREACH; #endif #ifdef EADDRINUSE else if (errno == EADDRINUSE) code = XML_IO_EADDRINUSE; #endif #ifdef EINPROGRESS else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS; #endif #ifdef EALREADY else if (errno == EALREADY) code = XML_IO_EALREADY; #endif #ifdef EAFNOSUPPORT else if (errno == EAFNOSUPPORT) code = XML_IO_EAFNOSUPPORT; #endif else code = XML_IO_UNKNOWN; #endif /* HAVE_ERRNO_H */ } idx = 0; if (code >= XML_IO_UNKNOWN) idx = code - XML_IO_UNKNOWN; if (idx >= (sizeof(IOerr) / sizeof(IOerr[0]))) idx = 0; __xmlSimpleError(domain, code, NULL, IOerr[idx], extra); } /** * xmlIOErr: * @code: the error number * @extra: extra information * * Handle an I/O error */ static void xmlIOErr(int code, const char *extra) { __xmlIOErr(XML_FROM_IO, code, extra); } /** * __xmlLoaderErr: * @ctx: the parser context * @extra: extra information * * Handle a resource access error */ void __xmlLoaderErr(void *ctx, const char *msg, const char *filename) { xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; xmlStructuredErrorFunc schannel = NULL; xmlGenericErrorFunc channel = NULL; void *data = NULL; xmlErrorLevel level = XML_ERR_ERROR; if ((ctxt != NULL) && (ctxt->disableSAX != 0) && (ctxt->instate == XML_PARSER_EOF)) return; if ((ctxt != NULL) && (ctxt->sax != NULL)) { if (ctxt->validate) { channel = ctxt->sax->error; level = XML_ERR_ERROR; } else { channel = ctxt->sax->warning; level = XML_ERR_WARNING; } if (ctxt->sax->initialized == XML_SAX2_MAGIC) schannel = ctxt->sax->serror; data = ctxt->userData; } __xmlRaiseError(schannel, channel, data, ctxt, NULL, XML_FROM_IO, XML_IO_LOAD_ERROR, level, NULL, 0, filename, NULL, NULL, 0, 0, msg, filename); } /************************************************************************ * * * Tree memory error handler * * * ************************************************************************/ /** * xmlNormalizeWindowsPath: * @path: the input file path * * This function is obsolete. Please see xmlURIFromPath in uri.c for * a better solution. * * Returns a canonicalized version of the path */ xmlChar * xmlNormalizeWindowsPath(const xmlChar *path) { return xmlCanonicPath(path); } /** * xmlCleanupInputCallbacks: * * clears the entire input callback table. this includes the * compiled-in I/O. */ void xmlCleanupInputCallbacks(void) { int i; if (!xmlInputCallbackInitialized) return; for (i = xmlInputCallbackNr - 1; i >= 0; i--) { xmlInputCallbackTable[i].matchcallback = NULL; xmlInputCallbackTable[i].opencallback = NULL; xmlInputCallbackTable[i].readcallback = NULL; xmlInputCallbackTable[i].closecallback = NULL; } xmlInputCallbackNr = 0; xmlInputCallbackInitialized = 0; } /** * xmlPopInputCallbacks: * * Clear the top input callback from the input stack. this includes the * compiled-in I/O. * * Returns the number of input callback registered or -1 in case of error. */ int xmlPopInputCallbacks(void) { if (!xmlInputCallbackInitialized) return(-1); if (xmlInputCallbackNr <= 0) return(-1); xmlInputCallbackNr--; xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = NULL; xmlInputCallbackTable[xmlInputCallbackNr].opencallback = NULL; xmlInputCallbackTable[xmlInputCallbackNr].readcallback = NULL; xmlInputCallbackTable[xmlInputCallbackNr].closecallback = NULL; return(xmlInputCallbackNr); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlCleanupOutputCallbacks: * * clears the entire output callback table. this includes the * compiled-in I/O callbacks. */ void xmlCleanupOutputCallbacks(void) { int i; if (!xmlOutputCallbackInitialized) return; for (i = xmlOutputCallbackNr - 1; i >= 0; i--) { xmlOutputCallbackTable[i].matchcallback = NULL; xmlOutputCallbackTable[i].opencallback = NULL; xmlOutputCallbackTable[i].writecallback = NULL; xmlOutputCallbackTable[i].closecallback = NULL; } xmlOutputCallbackNr = 0; xmlOutputCallbackInitialized = 0; } /** * xmlPopOutputCallbacks: * * Remove the top output callbacks from the output stack. This includes the * compiled-in I/O. * * Returns the number of output callback registered or -1 in case of error. */ int xmlPopOutputCallbacks(void) { if (!xmlOutputCallbackInitialized) return(-1); if (xmlOutputCallbackNr <= 0) return(-1); xmlOutputCallbackNr--; xmlOutputCallbackTable[xmlOutputCallbackNr].matchcallback = NULL; xmlOutputCallbackTable[xmlOutputCallbackNr].opencallback = NULL; xmlOutputCallbackTable[xmlOutputCallbackNr].writecallback = NULL; xmlOutputCallbackTable[xmlOutputCallbackNr].closecallback = NULL; return(xmlOutputCallbackNr); } #endif /* LIBXML_OUTPUT_ENABLED */ /************************************************************************ * * * Standard I/O for file accesses * * * ************************************************************************/ #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) /** * xmlWrapOpenUtf8: * @path: the path in utf-8 encoding * @mode: type of access (0 - read, 1 - write) * * function opens the file specified by @path * */ static FILE* xmlWrapOpenUtf8(const char *path,int mode) { FILE *fd = NULL; wchar_t *wPath; wPath = __xmlIOWin32UTF8ToWChar(path); if(wPath) { fd = _wfopen(wPath, mode ? L"wb" : L"rb"); xmlFree(wPath); } /* maybe path in native encoding */ if(fd == NULL) fd = fopen(path, mode ? "wb" : "rb"); return fd; } #ifdef LIBXML_ZLIB_ENABLED static gzFile xmlWrapGzOpenUtf8(const char *path, const char *mode) { gzFile fd; wchar_t *wPath; fd = gzopen (path, mode); if (fd) return fd; wPath = __xmlIOWin32UTF8ToWChar(path); if(wPath) { int d, m = (strstr(mode, "r") ? O_RDONLY : O_RDWR); #ifdef _O_BINARY m |= (strstr(mode, "b") ? _O_BINARY : 0); #endif d = _wopen(wPath, m); if (d >= 0) fd = gzdopen(d, mode); xmlFree(wPath); } return fd; } #endif /** * xmlWrapStatUtf8: * @path: the path in utf-8 encoding * @info: structure that stores results * * function obtains information about the file or directory * */ static int xmlWrapStatUtf8(const char *path, struct _stat *info) { int retval = -1; wchar_t *wPath; wPath = __xmlIOWin32UTF8ToWChar(path); if (wPath) { retval = _wstat(wPath, info); xmlFree(wPath); } /* maybe path in native encoding */ if(retval < 0) retval = _stat(path, info); return retval; } #endif /** * xmlCheckFilename: * @path: the path to check * * function checks to see if @path is a valid source * (file, socket...) for XML. * * if stat is not available on the target machine, * returns 1. if stat fails, returns 0 (if calling * stat on the filename fails, it can't be right). * if stat succeeds and the file is a directory, * returns 2. otherwise returns 1. */ int xmlCheckFilename (const char *path) { #ifdef HAVE_STAT #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) struct _stat stat_buffer; #else struct stat stat_buffer; #endif #endif if (path == NULL) return(0); #ifdef HAVE_STAT #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) /* * On Windows stat and wstat do not work with long pathname, * which start with '\\?\' */ if ((path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') && (path[3] == '\\') ) return 1; if (xmlWrapStatUtf8(path, &stat_buffer) == -1) return 0; #else if (stat(path, &stat_buffer) == -1) return 0; #endif #ifdef S_ISDIR if (S_ISDIR(stat_buffer.st_mode)) return 2; #endif #endif /* HAVE_STAT */ return 1; } /** * xmlInputReadCallbackNop: * * No Operation xmlInputReadCallback function, does nothing. * * Returns zero */ int xmlInputReadCallbackNop(void *context ATTRIBUTE_UNUSED, char *buffer ATTRIBUTE_UNUSED, int len ATTRIBUTE_UNUSED) { return(0); } /** * xmlFdRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to read * * Read @len bytes to @buffer from the I/O channel. * * Returns the number of bytes written */ static int xmlFdRead (void * context, char * buffer, int len) { int ret; ret = read((int) (ptrdiff_t) context, &buffer[0], len); if (ret < 0) xmlIOErr(0, "read()"); return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlFdWrite: * @context: the I/O context * @buffer: where to get data * @len: number of bytes to write * * Write @len bytes from @buffer to the I/O channel. * * Returns the number of bytes written */ static int xmlFdWrite (void * context, const char * buffer, int len) { int ret = 0; if (len > 0) { ret = write((int) (ptrdiff_t) context, &buffer[0], len); if (ret < 0) xmlIOErr(0, "write()"); } return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlFdClose: * @context: the I/O context * * Close an I/O channel * * Returns 0 in case of success and error code otherwise */ static int xmlFdClose (void * context) { int ret; ret = close((int) (ptrdiff_t) context); if (ret < 0) xmlIOErr(0, "close()"); return(ret); } /** * xmlFileMatch: * @filename: the URI for matching * * input from FILE * * * Returns 1 if matches, 0 otherwise */ int xmlFileMatch (const char *filename ATTRIBUTE_UNUSED) { return(1); } /** * xmlFileOpen_real: * @filename: the URI for matching * * input from FILE *, supports compressed input * if @filename is " " then the standard input is used * * Returns an I/O context or NULL in case of error */ static void * xmlFileOpen_real (const char *filename) { const char *path = filename; FILE *fd; if (filename == NULL) return(NULL); if (!strcmp(filename, "-")) { fd = stdin; return((void *) fd); } if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[17]; #else path = &filename[16]; #endif } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[8]; #else path = &filename[7]; #endif } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:/", 6)) { /* lots of generators seems to lazy to read RFC 1738 */ #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[6]; #else path = &filename[5]; #endif } /* Do not check DDNAME on zOS ! */ #if !defined(__MVS__) if (!xmlCheckFilename(path)) return(NULL); #endif #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) fd = xmlWrapOpenUtf8(path, 0); #else fd = fopen(path, "r"); #endif /* WIN32 */ if (fd == NULL) xmlIOErr(0, path); return((void *) fd); } /** * xmlFileOpen: * @filename: the URI for matching * * Wrapper around xmlFileOpen_real that try it with an unescaped * version of @filename, if this fails fallback to @filename * * Returns a handler or NULL in case or failure */ void * xmlFileOpen (const char *filename) { char *unescaped; void *retval; retval = xmlFileOpen_real(filename); if (retval == NULL) { unescaped = xmlURIUnescapeString(filename, 0, NULL); if (unescaped != NULL) { retval = xmlFileOpen_real(unescaped); xmlFree(unescaped); } } return retval; } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlFileOpenW: * @filename: the URI for matching * * output to from FILE *, * if @filename is "-" then the standard output is used * * Returns an I/O context or NULL in case of error */ static void * xmlFileOpenW (const char *filename) { const char *path = NULL; FILE *fd; if (!strcmp(filename, "-")) { fd = stdout; return((void *) fd); } if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[17]; #else path = &filename[16]; #endif else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[8]; #else path = &filename[7]; #endif } else path = filename; if (path == NULL) return(NULL); #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) fd = xmlWrapOpenUtf8(path, 1); #elif(__MVS__) fd = fopen(path, "w"); #else fd = fopen(path, "wb"); #endif /* WIN32 */ if (fd == NULL) xmlIOErr(0, path); return((void *) fd); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlFileRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Read @len bytes to @buffer from the I/O channel. * * Returns the number of bytes written or < 0 in case of failure */ int xmlFileRead (void * context, char * buffer, int len) { int ret; if ((context == NULL) || (buffer == NULL)) return(-1); ret = fread(&buffer[0], 1, len, (FILE *) context); if (ret < 0) xmlIOErr(0, "fread()"); return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlFileWrite: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Write @len bytes from @buffer to the I/O channel. * * Returns the number of bytes written */ static int xmlFileWrite (void * context, const char * buffer, int len) { int items; if ((context == NULL) || (buffer == NULL)) return(-1); items = fwrite(&buffer[0], len, 1, (FILE *) context); if ((items == 0) && (ferror((FILE *) context))) { xmlIOErr(0, "fwrite()"); return(-1); } return(items * len); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlFileClose: * @context: the I/O context * * Close an I/O channel * * Returns 0 or -1 in case of error */ int xmlFileClose (void * context) { FILE *fil; int ret; if (context == NULL) return(-1); fil = (FILE *) context; if ((fil == stdout) || (fil == stderr)) { ret = fflush(fil); if (ret < 0) xmlIOErr(0, "fflush()"); return(0); } if (fil == stdin) return(0); ret = ( fclose((FILE *) context) == EOF ) ? -1 : 0; if (ret < 0) xmlIOErr(0, "fclose()"); return(ret); } /** * xmlFileFlush: * @context: the I/O context * * Flush an I/O channel */ static int xmlFileFlush (void * context) { int ret; if (context == NULL) return(-1); ret = ( fflush((FILE *) context) == EOF ) ? -1 : 0; if (ret < 0) xmlIOErr(0, "fflush()"); return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlBufferWrite: * @context: the xmlBuffer * @buffer: the data to write * @len: number of bytes to write * * Write @len bytes from @buffer to the xml buffer * * Returns the number of bytes written */ static int xmlBufferWrite (void * context, const char * buffer, int len) { int ret; ret = xmlBufferAdd((xmlBufferPtr) context, (const xmlChar *) buffer, len); if (ret != 0) return(-1); return(len); } #endif #ifdef LIBXML_ZLIB_ENABLED /************************************************************************ * * * I/O for compressed file accesses * * * ************************************************************************/ /** * xmlGzfileMatch: * @filename: the URI for matching * * input from compressed file test * * Returns 1 if matches, 0 otherwise */ static int xmlGzfileMatch (const char *filename ATTRIBUTE_UNUSED) { return(1); } /** * xmlGzfileOpen_real: * @filename: the URI for matching * * input from compressed file open * if @filename is " " then the standard input is used * * Returns an I/O context or NULL in case of error */ static void * xmlGzfileOpen_real (const char *filename) { const char *path = NULL; gzFile fd; if (!strcmp(filename, "-")) { int duped_fd = dup(fileno(stdin)); fd = gzdopen(duped_fd, "rb"); if (fd == Z_NULL && duped_fd >= 0) { close(duped_fd); /* gzdOpen() does not close on failure */ } return((void *) fd); } if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[17]; #else path = &filename[16]; #endif else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[8]; #else path = &filename[7]; #endif } else path = filename; if (path == NULL) return(NULL); if (!xmlCheckFilename(path)) return(NULL); #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) fd = xmlWrapGzOpenUtf8(path, "rb"); #else fd = gzopen(path, "rb"); #endif return((void *) fd); } /** * xmlGzfileOpen: * @filename: the URI for matching * * Wrapper around xmlGzfileOpen if the open fais, it will * try to unescape @filename */ static void * xmlGzfileOpen (const char *filename) { char *unescaped; void *retval; retval = xmlGzfileOpen_real(filename); if (retval == NULL) { unescaped = xmlURIUnescapeString(filename, 0, NULL); if (unescaped != NULL) { retval = xmlGzfileOpen_real(unescaped); } xmlFree(unescaped); } return retval; } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlGzfileOpenW: * @filename: the URI for matching * @compression: the compression factor (0 - 9 included) * * input from compressed file open * if @filename is " " then the standard input is used * * Returns an I/O context or NULL in case of error */ static void * xmlGzfileOpenW (const char *filename, int compression) { const char *path = NULL; char mode[15]; gzFile fd; snprintf(mode, sizeof(mode), "wb%d", compression); if (!strcmp(filename, "-")) { int duped_fd = dup(fileno(stdout)); fd = gzdopen(duped_fd, "rb"); if (fd == Z_NULL && duped_fd >= 0) { close(duped_fd); /* gzdOpen() does not close on failure */ } return((void *) fd); } if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[17]; #else path = &filename[16]; #endif else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &filename[8]; #else path = &filename[7]; #endif } else path = filename; if (path == NULL) return(NULL); #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__) fd = xmlWrapGzOpenUtf8(path, mode); #else fd = gzopen(path, mode); #endif return((void *) fd); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlGzfileRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Read @len bytes to @buffer from the compressed I/O channel. * * Returns the number of bytes read. */ static int xmlGzfileRead (void * context, char * buffer, int len) { int ret; ret = gzread((gzFile) context, &buffer[0], len); if (ret < 0) xmlIOErr(0, "gzread()"); return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlGzfileWrite: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Write @len bytes from @buffer to the compressed I/O channel. * * Returns the number of bytes written */ static int xmlGzfileWrite (void * context, const char * buffer, int len) { int ret; ret = gzwrite((gzFile) context, (char *) &buffer[0], len); if (ret < 0) xmlIOErr(0, "gzwrite()"); return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlGzfileClose: * @context: the I/O context * * Close a compressed I/O channel */ static int xmlGzfileClose (void * context) { int ret; ret = (gzclose((gzFile) context) == Z_OK ) ? 0 : -1; if (ret < 0) xmlIOErr(0, "gzclose()"); return(ret); } #endif /* LIBXML_ZLIB_ENABLED */ #ifdef LIBXML_LZMA_ENABLED /************************************************************************ * * * I/O for compressed file accesses * * * ************************************************************************/ #error #include "xzlib.h" /** * xmlXzfileMatch: * @filename: the URI for matching * * input from compressed file test * * Returns 1 if matches, 0 otherwise */ static int xmlXzfileMatch (const char *filename ATTRIBUTE_UNUSED) { return(1); } /** * xmlXzFileOpen_real: * @filename: the URI for matching * * input from compressed file open * if @filename is " " then the standard input is used * * Returns an I/O context or NULL in case of error */ static void * xmlXzfileOpen_real (const char *filename) { const char *path = NULL; xzFile fd; if (!strcmp(filename, "-")) { fd = __libxml2_xzdopen(dup(fileno(stdin)), "rb"); return((void *) fd); } if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) { path = &filename[16]; } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { path = &filename[7]; } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:/", 6)) { /* lots of generators seems to lazy to read RFC 1738 */ path = &filename[5]; } else path = filename; if (path == NULL) return(NULL); if (!xmlCheckFilename(path)) return(NULL); fd = __libxml2_xzopen(path, "rb"); return((void *) fd); } /** * xmlXzfileOpen: * @filename: the URI for matching * * Wrapper around xmlXzfileOpen_real that try it with an unescaped * version of @filename, if this fails fallback to @filename * * Returns a handler or NULL in case or failure */ static void * xmlXzfileOpen (const char *filename) { char *unescaped; void *retval; retval = xmlXzfileOpen_real(filename); if (retval == NULL) { unescaped = xmlURIUnescapeString(filename, 0, NULL); if (unescaped != NULL) { retval = xmlXzfileOpen_real(unescaped); } xmlFree(unescaped); } return retval; } /** * xmlXzfileRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Read @len bytes to @buffer from the compressed I/O channel. * * Returns the number of bytes written */ static int xmlXzfileRead (void * context, char * buffer, int len) { int ret; ret = __libxml2_xzread((xzFile) context, &buffer[0], len); if (ret < 0) xmlIOErr(0, "xzread()"); return(ret); } /** * xmlXzfileClose: * @context: the I/O context * * Close a compressed I/O channel */ static int xmlXzfileClose (void * context) { int ret; ret = (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1; if (ret < 0) xmlIOErr(0, "xzclose()"); return(ret); } #endif /* LIBXML_LZMA_ENABLED */ #ifdef LIBXML_HTTP_ENABLED /************************************************************************ * * * I/O for HTTP file accesses * * * ************************************************************************/ #ifdef LIBXML_OUTPUT_ENABLED typedef struct xmlIOHTTPWriteCtxt_ { int compression; char * uri; void * doc_buff; } xmlIOHTTPWriteCtxt, *xmlIOHTTPWriteCtxtPtr; #ifdef LIBXML_ZLIB_ENABLED #define DFLT_WBITS ( -15 ) #define DFLT_MEM_LVL ( 8 ) #define GZ_MAGIC1 ( 0x1f ) #define GZ_MAGIC2 ( 0x8b ) #define LXML_ZLIB_OS_CODE ( 0x03 ) #define INIT_HTTP_BUFF_SIZE ( 32768 ) #define DFLT_ZLIB_RATIO ( 5 ) /* ** Data structure and functions to work with sending compressed data ** via HTTP. */ typedef struct xmlZMemBuff_ { unsigned long size; unsigned long crc; unsigned char * zbuff; z_stream zctrl; } xmlZMemBuff, *xmlZMemBuffPtr; /** * append_reverse_ulong * @buff: Compressed memory buffer * @data: Unsigned long to append * * Append a unsigned long in reverse byte order to the end of the * memory buffer. */ static void append_reverse_ulong( xmlZMemBuff * buff, unsigned long data ) { int idx; if ( buff == NULL ) return; /* ** This is plagiarized from putLong in gzio.c (zlib source) where ** the number "4" is hardcoded. If zlib is ever patched to ** support 64 bit file sizes, this code would need to be patched ** as well. */ for ( idx = 0; idx < 4; idx++ ) { *buff->zctrl.next_out = ( data & 0xff ); data >>= 8; buff->zctrl.next_out++; } return; } /** * * xmlFreeZMemBuff * @buff: The memory buffer context to clear * * Release all the resources associated with the compressed memory buffer. */ static void xmlFreeZMemBuff( xmlZMemBuffPtr buff ) { #ifdef DEBUG_HTTP int z_err; #endif if ( buff == NULL ) return; xmlFree( buff->zbuff ); #ifdef DEBUG_HTTP z_err = deflateEnd( &buff->zctrl ); if ( z_err != Z_OK ) xmlGenericError( xmlGenericErrorContext, "xmlFreeZMemBuff: Error releasing zlib context: %d\n", z_err ); #else deflateEnd( &buff->zctrl ); #endif xmlFree( buff ); return; } /** * xmlCreateZMemBuff *@compression: Compression value to use * * Create a memory buffer to hold the compressed XML document. The * compressed document in memory will end up being identical to what * would be created if gzopen/gzwrite/gzclose were being used to * write the document to disk. The code for the header/trailer data to * the compression is plagiarized from the zlib source files. */ static void * xmlCreateZMemBuff( int compression ) { int z_err; int hdr_lgth; xmlZMemBuffPtr buff = NULL; if ( ( compression < 1 ) || ( compression > 9 ) ) return ( NULL ); /* Create the control and data areas */ buff = xmlMalloc( sizeof( xmlZMemBuff ) ); if ( buff == NULL ) { xmlIOErrMemory("creating buffer context"); return ( NULL ); } (void)memset( buff, 0, sizeof( xmlZMemBuff ) ); buff->size = INIT_HTTP_BUFF_SIZE; buff->zbuff = xmlMalloc( buff->size ); if ( buff->zbuff == NULL ) { xmlFreeZMemBuff( buff ); xmlIOErrMemory("creating buffer"); return ( NULL ); } z_err = deflateInit2( &buff->zctrl, compression, Z_DEFLATED, DFLT_WBITS, DFLT_MEM_LVL, Z_DEFAULT_STRATEGY ); if ( z_err != Z_OK ) { xmlChar msg[500]; xmlFreeZMemBuff( buff ); buff = NULL; xmlStrPrintf(msg, 500, "xmlCreateZMemBuff: %s %d\n", "Error initializing compression context. ZLIB error:", z_err ); xmlIOErr(XML_IO_WRITE, (const char *) msg); return ( NULL ); } /* Set the header data. The CRC will be needed for the trailer */ buff->crc = crc32( 0L, NULL, 0 ); hdr_lgth = snprintf( (char *)buff->zbuff, buff->size, "%c%c%c%c%c%c%c%c%c%c", GZ_MAGIC1, GZ_MAGIC2, Z_DEFLATED, 0, 0, 0, 0, 0, 0, LXML_ZLIB_OS_CODE ); buff->zctrl.next_out = buff->zbuff + hdr_lgth; buff->zctrl.avail_out = buff->size - hdr_lgth; return ( buff ); } /** * xmlZMemBuffExtend * @buff: Buffer used to compress and consolidate data. * @ext_amt: Number of bytes to extend the buffer. * * Extend the internal buffer used to store the compressed data by the * specified amount. * * Returns 0 on success or -1 on failure to extend the buffer. On failure * the original buffer still exists at the original size. */ static int xmlZMemBuffExtend( xmlZMemBuffPtr buff, size_t ext_amt ) { int rc = -1; size_t new_size; size_t cur_used; unsigned char * tmp_ptr = NULL; if ( buff == NULL ) return ( -1 ); else if ( ext_amt == 0 ) return ( 0 ); cur_used = buff->zctrl.next_out - buff->zbuff; new_size = buff->size + ext_amt; #ifdef DEBUG_HTTP if ( cur_used > new_size ) xmlGenericError( xmlGenericErrorContext, "xmlZMemBuffExtend: %s\n%s %d bytes.\n", "Buffer overwrite detected during compressed memory", "buffer extension. Overflowed by", (cur_used - new_size ) ); #endif tmp_ptr = xmlRealloc( buff->zbuff, new_size ); if ( tmp_ptr != NULL ) { rc = 0; buff->size = new_size; buff->zbuff = tmp_ptr; buff->zctrl.next_out = tmp_ptr + cur_used; buff->zctrl.avail_out = new_size - cur_used; } else { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlZMemBuffExtend: %s %lu bytes.\n", "Allocation failure extending output buffer to", (unsigned long) new_size ); xmlIOErr(XML_IO_WRITE, (const char *) msg); } return ( rc ); } /** * xmlZMemBuffAppend * @buff: Buffer used to compress and consolidate data * @src: Uncompressed source content to append to buffer * @len: Length of source data to append to buffer * * Compress and append data to the internal buffer. The data buffer * will be expanded if needed to store the additional data. * * Returns the number of bytes appended to the buffer or -1 on error. */ static int xmlZMemBuffAppend( xmlZMemBuffPtr buff, const char * src, int len ) { int z_err; size_t min_accept; if ( ( buff == NULL ) || ( src == NULL ) ) return ( -1 ); buff->zctrl.avail_in = len; buff->zctrl.next_in = (unsigned char *)src; while ( buff->zctrl.avail_in > 0 ) { /* ** Extend the buffer prior to deflate call if a reasonable amount ** of output buffer space is not available. */ min_accept = buff->zctrl.avail_in / DFLT_ZLIB_RATIO; if ( buff->zctrl.avail_out <= min_accept ) { if ( xmlZMemBuffExtend( buff, buff->size ) == -1 ) return ( -1 ); } z_err = deflate( &buff->zctrl, Z_NO_FLUSH ); if ( z_err != Z_OK ) { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlZMemBuffAppend: %s %d %s - %d", "Compression error while appending", len, "bytes to buffer. ZLIB error", z_err ); xmlIOErr(XML_IO_WRITE, (const char *) msg); return ( -1 ); } } buff->crc = crc32( buff->crc, (unsigned char *)src, len ); return ( len ); } /** * xmlZMemBuffGetContent * @buff: Compressed memory content buffer * @data_ref: Pointer reference to point to compressed content * * Flushes the compression buffers, appends gzip file trailers and * returns the compressed content and length of the compressed data. * NOTE: The gzip trailer code here is plagiarized from zlib source. * * Returns the length of the compressed data or -1 on error. */ static int xmlZMemBuffGetContent( xmlZMemBuffPtr buff, char ** data_ref ) { int zlgth = -1; int z_err; if ( ( buff == NULL ) || ( data_ref == NULL ) ) return ( -1 ); /* Need to loop until compression output buffers are flushed */ do { z_err = deflate( &buff->zctrl, Z_FINISH ); if ( z_err == Z_OK ) { /* In this case Z_OK means more buffer space needed */ if ( xmlZMemBuffExtend( buff, buff->size ) == -1 ) return ( -1 ); } } while ( z_err == Z_OK ); /* If the compression state is not Z_STREAM_END, some error occurred */ if ( z_err == Z_STREAM_END ) { /* Need to append the gzip data trailer */ if ( buff->zctrl.avail_out < ( 2 * sizeof( unsigned long ) ) ) { if ( xmlZMemBuffExtend(buff, (2 * sizeof(unsigned long))) == -1 ) return ( -1 ); } /* ** For whatever reason, the CRC and length data are pushed out ** in reverse byte order. So a memcpy can't be used here. */ append_reverse_ulong( buff, buff->crc ); append_reverse_ulong( buff, buff->zctrl.total_in ); zlgth = buff->zctrl.next_out - buff->zbuff; *data_ref = (char *)buff->zbuff; } else { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlZMemBuffGetContent: %s - %d\n", "Error flushing zlib buffers. Error code", z_err ); xmlIOErr(XML_IO_WRITE, (const char *) msg); } return ( zlgth ); } #endif /* LIBXML_OUTPUT_ENABLED */ #endif /* LIBXML_ZLIB_ENABLED */ #ifdef LIBXML_OUTPUT_ENABLED /** * xmlFreeHTTPWriteCtxt * @ctxt: Context to cleanup * * Free allocated memory and reclaim system resources. * * No return value. */ static void xmlFreeHTTPWriteCtxt( xmlIOHTTPWriteCtxtPtr ctxt ) { if ( ctxt->uri != NULL ) xmlFree( ctxt->uri ); if ( ctxt->doc_buff != NULL ) { #ifdef LIBXML_ZLIB_ENABLED if ( ctxt->compression > 0 ) { xmlFreeZMemBuff( ctxt->doc_buff ); } else #endif { xmlOutputBufferClose( ctxt->doc_buff ); } } xmlFree( ctxt ); return; } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlIOHTTPMatch: * @filename: the URI for matching * * check if the URI matches an HTTP one * * Returns 1 if matches, 0 otherwise */ int xmlIOHTTPMatch (const char *filename) { if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "http://", 7)) return(1); return(0); } /** * xmlIOHTTPOpen: * @filename: the URI for matching * * open an HTTP I/O channel * * Returns an I/O context or NULL in case of error */ void * xmlIOHTTPOpen (const char *filename) { return(xmlNanoHTTPOpen(filename, NULL)); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlIOHTTPOpenW: * @post_uri: The destination URI for the document * @compression: The compression desired for the document. * * Open a temporary buffer to collect the document for a subsequent HTTP POST * request. Non-static as is called from the output buffer creation routine. * * Returns an I/O context or NULL in case of error. */ void * xmlIOHTTPOpenW(const char *post_uri, int compression ATTRIBUTE_UNUSED) { xmlIOHTTPWriteCtxtPtr ctxt = NULL; if (post_uri == NULL) return (NULL); ctxt = xmlMalloc(sizeof(xmlIOHTTPWriteCtxt)); if (ctxt == NULL) { xmlIOErrMemory("creating HTTP output context"); return (NULL); } (void) memset(ctxt, 0, sizeof(xmlIOHTTPWriteCtxt)); ctxt->uri = (char *) xmlStrdup((const xmlChar *)post_uri); if (ctxt->uri == NULL) { xmlIOErrMemory("copying URI"); xmlFreeHTTPWriteCtxt(ctxt); return (NULL); } /* * ** Since the document length is required for an HTTP post, * ** need to put the document into a buffer. A memory buffer * ** is being used to avoid pushing the data to disk and back. */ #ifdef LIBXML_ZLIB_ENABLED if ((compression > 0) && (compression <= 9)) { ctxt->compression = compression; ctxt->doc_buff = xmlCreateZMemBuff(compression); } else #endif { /* Any character conversions should have been done before this */ ctxt->doc_buff = xmlAllocOutputBufferInternal(NULL); } if (ctxt->doc_buff == NULL) { xmlFreeHTTPWriteCtxt(ctxt); ctxt = NULL; } return (ctxt); } #endif /* LIBXML_OUTPUT_ENABLED */ #ifdef LIBXML_OUTPUT_ENABLED /** * xmlIOHTTPDfltOpenW * @post_uri: The destination URI for this document. * * Calls xmlIOHTTPOpenW with no compression to set up for a subsequent * HTTP post command. This function should generally not be used as * the open callback is short circuited in xmlOutputBufferCreateFile. * * Returns a pointer to the new IO context. */ static void * xmlIOHTTPDfltOpenW( const char * post_uri ) { return ( xmlIOHTTPOpenW( post_uri, 0 ) ); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlIOHTTPRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Read @len bytes to @buffer from the I/O channel. * * Returns the number of bytes written */ int xmlIOHTTPRead(void * context, char * buffer, int len) { if ((buffer == NULL) || (len < 0)) return(-1); return(xmlNanoHTTPRead(context, &buffer[0], len)); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlIOHTTPWrite * @context: previously opened writing context * @buffer: data to output to temporary buffer * @len: bytes to output * * Collect data from memory buffer into a temporary file for later * processing. * * Returns number of bytes written. */ static int xmlIOHTTPWrite( void * context, const char * buffer, int len ) { xmlIOHTTPWriteCtxtPtr ctxt = context; if ( ( ctxt == NULL ) || ( ctxt->doc_buff == NULL ) || ( buffer == NULL ) ) return ( -1 ); if ( len > 0 ) { /* Use gzwrite or fwrite as previously setup in the open call */ #ifdef LIBXML_ZLIB_ENABLED if ( ctxt->compression > 0 ) len = xmlZMemBuffAppend( ctxt->doc_buff, buffer, len ); else #endif len = xmlOutputBufferWrite( ctxt->doc_buff, len, buffer ); if ( len < 0 ) { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlIOHTTPWrite: %s\n%s '%s'.\n", "Error appending to internal buffer.", "Error sending document to URI", ctxt->uri ); xmlIOErr(XML_IO_WRITE, (const char *) msg); } } return ( len ); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlIOHTTPClose: * @context: the I/O context * * Close an HTTP I/O channel * * Returns 0 */ int xmlIOHTTPClose (void * context) { xmlNanoHTTPClose(context); return 0; } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlIOHTTCloseWrite * @context: The I/O context * @http_mthd: The HTTP method to be used when sending the data * * Close the transmit HTTP I/O channel and actually send the data. */ static int xmlIOHTTPCloseWrite( void * context, const char * http_mthd ) { int close_rc = -1; int http_rtn = 0; int content_lgth = 0; xmlIOHTTPWriteCtxtPtr ctxt = context; char * http_content = NULL; char * content_encoding = NULL; char * content_type = (char *) "text/xml"; void * http_ctxt = NULL; if ( ( ctxt == NULL ) || ( http_mthd == NULL ) ) return ( -1 ); /* Retrieve the content from the appropriate buffer */ #ifdef LIBXML_ZLIB_ENABLED if ( ctxt->compression > 0 ) { content_lgth = xmlZMemBuffGetContent( ctxt->doc_buff, &http_content ); content_encoding = (char *) "Content-Encoding: gzip"; } else #endif { /* Pull the data out of the memory output buffer */ xmlOutputBufferPtr dctxt = ctxt->doc_buff; http_content = (char *) xmlBufContent(dctxt->buffer); content_lgth = xmlBufUse(dctxt->buffer); } if ( http_content == NULL ) { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlIOHTTPCloseWrite: %s '%s' %s '%s'.\n", "Error retrieving content.\nUnable to", http_mthd, "data to URI", ctxt->uri ); xmlIOErr(XML_IO_WRITE, (const char *) msg); } else { http_ctxt = xmlNanoHTTPMethod( ctxt->uri, http_mthd, http_content, &content_type, content_encoding, content_lgth ); if ( http_ctxt != NULL ) { #ifdef DEBUG_HTTP /* If testing/debugging - dump reply with request content */ FILE * tst_file = NULL; char buffer[ 4096 ]; char * dump_name = NULL; int avail; xmlGenericError( xmlGenericErrorContext, "xmlNanoHTTPCloseWrite: HTTP %s to\n%s returned %d.\n", http_mthd, ctxt->uri, xmlNanoHTTPReturnCode( http_ctxt ) ); /* ** Since either content or reply may be gzipped, ** dump them to separate files instead of the ** standard error context. */ dump_name = tempnam( NULL, "lxml" ); if ( dump_name != NULL ) { (void)snprintf( buffer, sizeof(buffer), "%s.content", dump_name ); tst_file = fopen( buffer, "wb" ); if ( tst_file != NULL ) { xmlGenericError( xmlGenericErrorContext, "Transmitted content saved in file: %s\n", buffer ); fwrite( http_content, sizeof( char ), content_lgth, tst_file ); fclose( tst_file ); } (void)snprintf( buffer, sizeof(buffer), "%s.reply", dump_name ); tst_file = fopen( buffer, "wb" ); if ( tst_file != NULL ) { xmlGenericError( xmlGenericErrorContext, "Reply content saved in file: %s\n", buffer ); while ( (avail = xmlNanoHTTPRead( http_ctxt, buffer, sizeof( buffer ) )) > 0 ) { fwrite( buffer, sizeof( char ), avail, tst_file ); } fclose( tst_file ); } free( dump_name ); } #endif /* DEBUG_HTTP */ http_rtn = xmlNanoHTTPReturnCode( http_ctxt ); if ( ( http_rtn >= 200 ) && ( http_rtn < 300 ) ) close_rc = 0; else { xmlChar msg[500]; xmlStrPrintf(msg, 500, "xmlIOHTTPCloseWrite: HTTP '%s' of %d %s\n'%s' %s %d\n", http_mthd, content_lgth, "bytes to URI", ctxt->uri, "failed. HTTP return code:", http_rtn ); xmlIOErr(XML_IO_WRITE, (const char *) msg); } xmlNanoHTTPClose( http_ctxt ); xmlFree( content_type ); } } /* Final cleanups */ xmlFreeHTTPWriteCtxt( ctxt ); return ( close_rc ); } /** * xmlIOHTTPClosePut * * @context: The I/O context * * Close the transmit HTTP I/O channel and actually send data using a PUT * HTTP method. */ static int xmlIOHTTPClosePut( void * ctxt ) { return ( xmlIOHTTPCloseWrite( ctxt, "PUT" ) ); } /** * xmlIOHTTPClosePost * * @context: The I/O context * * Close the transmit HTTP I/O channel and actually send data using a POST * HTTP method. */ static int xmlIOHTTPClosePost( void * ctxt ) { return ( xmlIOHTTPCloseWrite( ctxt, "POST" ) ); } #endif /* LIBXML_OUTPUT_ENABLED */ #endif /* LIBXML_HTTP_ENABLED */ #ifdef LIBXML_FTP_ENABLED /************************************************************************ * * * I/O for FTP file accesses * * * ************************************************************************/ /** * xmlIOFTPMatch: * @filename: the URI for matching * * check if the URI matches an FTP one * * Returns 1 if matches, 0 otherwise */ int xmlIOFTPMatch (const char *filename) { if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "ftp://", 6)) return(1); return(0); } /** * xmlIOFTPOpen: * @filename: the URI for matching * * open an FTP I/O channel * * Returns an I/O context or NULL in case of error */ void * xmlIOFTPOpen (const char *filename) { return(xmlNanoFTPOpen(filename)); } /** * xmlIOFTPRead: * @context: the I/O context * @buffer: where to drop data * @len: number of bytes to write * * Read @len bytes to @buffer from the I/O channel. * * Returns the number of bytes written */ int xmlIOFTPRead(void * context, char * buffer, int len) { if ((buffer == NULL) || (len < 0)) return(-1); return(xmlNanoFTPRead(context, &buffer[0], len)); } /** * xmlIOFTPClose: * @context: the I/O context * * Close an FTP I/O channel * * Returns 0 */ int xmlIOFTPClose (void * context) { return ( xmlNanoFTPClose(context) ); } #endif /* LIBXML_FTP_ENABLED */ /** * xmlRegisterInputCallbacks: * @matchFunc: the xmlInputMatchCallback * @openFunc: the xmlInputOpenCallback * @readFunc: the xmlInputReadCallback * @closeFunc: the xmlInputCloseCallback * * Register a new set of I/O callback for handling parser input. * * Returns the registered handler number or -1 in case of error */ int xmlRegisterInputCallbacks(xmlInputMatchCallback matchFunc, xmlInputOpenCallback openFunc, xmlInputReadCallback readFunc, xmlInputCloseCallback closeFunc) { if (xmlInputCallbackNr >= MAX_INPUT_CALLBACK) { return(-1); } xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = matchFunc; xmlInputCallbackTable[xmlInputCallbackNr].opencallback = openFunc; xmlInputCallbackTable[xmlInputCallbackNr].readcallback = readFunc; xmlInputCallbackTable[xmlInputCallbackNr].closecallback = closeFunc; xmlInputCallbackInitialized = 1; return(xmlInputCallbackNr++); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlRegisterOutputCallbacks: * @matchFunc: the xmlOutputMatchCallback * @openFunc: the xmlOutputOpenCallback * @writeFunc: the xmlOutputWriteCallback * @closeFunc: the xmlOutputCloseCallback * * Register a new set of I/O callback for handling output. * * Returns the registered handler number or -1 in case of error */ int xmlRegisterOutputCallbacks(xmlOutputMatchCallback matchFunc, xmlOutputOpenCallback openFunc, xmlOutputWriteCallback writeFunc, xmlOutputCloseCallback closeFunc) { if (xmlOutputCallbackNr >= MAX_OUTPUT_CALLBACK) { return(-1); } xmlOutputCallbackTable[xmlOutputCallbackNr].matchcallback = matchFunc; xmlOutputCallbackTable[xmlOutputCallbackNr].opencallback = openFunc; xmlOutputCallbackTable[xmlOutputCallbackNr].writecallback = writeFunc; xmlOutputCallbackTable[xmlOutputCallbackNr].closecallback = closeFunc; xmlOutputCallbackInitialized = 1; return(xmlOutputCallbackNr++); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlRegisterDefaultInputCallbacks: * * Registers the default compiled-in I/O handlers. */ void xmlRegisterDefaultInputCallbacks(void) { if (xmlInputCallbackInitialized) return; xmlRegisterInputCallbacks(xmlFileMatch, xmlFileOpen, xmlFileRead, xmlFileClose); #ifdef LIBXML_ZLIB_ENABLED xmlRegisterInputCallbacks(xmlGzfileMatch, xmlGzfileOpen, xmlGzfileRead, xmlGzfileClose); #endif /* LIBXML_ZLIB_ENABLED */ #ifdef LIBXML_LZMA_ENABLED xmlRegisterInputCallbacks(xmlXzfileMatch, xmlXzfileOpen, xmlXzfileRead, xmlXzfileClose); #endif /* LIBXML_LZMA_ENABLED */ #ifdef LIBXML_HTTP_ENABLED xmlRegisterInputCallbacks(xmlIOHTTPMatch, xmlIOHTTPOpen, xmlIOHTTPRead, xmlIOHTTPClose); #endif /* LIBXML_HTTP_ENABLED */ #ifdef LIBXML_FTP_ENABLED xmlRegisterInputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen, xmlIOFTPRead, xmlIOFTPClose); #endif /* LIBXML_FTP_ENABLED */ xmlInputCallbackInitialized = 1; } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlRegisterDefaultOutputCallbacks: * * Registers the default compiled-in I/O handlers. */ void xmlRegisterDefaultOutputCallbacks (void) { if (xmlOutputCallbackInitialized) return; xmlRegisterOutputCallbacks(xmlFileMatch, xmlFileOpenW, xmlFileWrite, xmlFileClose); #ifdef LIBXML_HTTP_ENABLED xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW, xmlIOHTTPWrite, xmlIOHTTPClosePut); #endif /********************************* No way a-priori to distinguish between gzipped files from uncompressed ones except opening if existing then closing and saving with same compression ratio ... a pain. #ifdef LIBXML_ZLIB_ENABLED xmlRegisterOutputCallbacks(xmlGzfileMatch, xmlGzfileOpen, xmlGzfileWrite, xmlGzfileClose); #endif Nor FTP PUT .... #ifdef LIBXML_FTP_ENABLED xmlRegisterOutputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen, xmlIOFTPWrite, xmlIOFTPClose); #endif **********************************/ xmlOutputCallbackInitialized = 1; } #ifdef LIBXML_HTTP_ENABLED /** * xmlRegisterHTTPPostCallbacks: * * By default, libxml submits HTTP output requests using the "PUT" method. * Calling this method changes the HTTP output method to use the "POST" * method instead. * */ void xmlRegisterHTTPPostCallbacks( void ) { /* Register defaults if not done previously */ if ( xmlOutputCallbackInitialized == 0 ) xmlRegisterDefaultOutputCallbacks( ); xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW, xmlIOHTTPWrite, xmlIOHTTPClosePost); return; } #endif #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlAllocParserInputBuffer: * @enc: the charset encoding if known * * Create a buffered parser input for progressive parsing * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlAllocParserInputBuffer(xmlCharEncoding enc) { xmlParserInputBufferPtr ret; ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer)); if (ret == NULL) { xmlIOErrMemory("creating input buffer"); return(NULL); } memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer)); ret->buffer = xmlBufCreateSize(2 * xmlDefaultBufferSize); if (ret->buffer == NULL) { xmlFree(ret); return(NULL); } xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_DOUBLEIT); ret->encoder = xmlGetCharEncodingHandler(enc); if (ret->encoder != NULL) ret->raw = xmlBufCreateSize(2 * xmlDefaultBufferSize); else ret->raw = NULL; ret->readcallback = NULL; ret->closecallback = NULL; ret->context = NULL; ret->compressed = -1; ret->rawconsumed = 0; return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlAllocOutputBuffer: * @encoder: the encoding converter or NULL * * Create a buffered parser output * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlAllocOutputBuffer(xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; ret = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer)); if (ret == NULL) { xmlIOErrMemory("creating output buffer"); return(NULL); } memset(ret, 0, (size_t) sizeof(xmlOutputBuffer)); ret->buffer = xmlBufCreate(); if (ret->buffer == NULL) { xmlFree(ret); return(NULL); } /* try to avoid a performance problem with Windows realloc() */ if (xmlBufGetAllocationScheme(ret->buffer) == XML_BUFFER_ALLOC_EXACT) xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_DOUBLEIT); ret->encoder = encoder; if (encoder != NULL) { ret->conv = xmlBufCreateSize(4000); if (ret->conv == NULL) { xmlBufFree(ret->buffer); xmlFree(ret); return(NULL); } /* * This call is designed to initiate the encoder state */ xmlCharEncOutput(ret, 1); } else ret->conv = NULL; ret->writecallback = NULL; ret->closecallback = NULL; ret->context = NULL; ret->written = 0; return(ret); } /** * xmlAllocOutputBufferInternal: * @encoder: the encoding converter or NULL * * Create a buffered parser output * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; ret = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer)); if (ret == NULL) { xmlIOErrMemory("creating output buffer"); return(NULL); } memset(ret, 0, (size_t) sizeof(xmlOutputBuffer)); ret->buffer = xmlBufCreate(); if (ret->buffer == NULL) { xmlFree(ret); return(NULL); } /* * For conversion buffers we use the special IO handling */ xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_IO); ret->encoder = encoder; if (encoder != NULL) { ret->conv = xmlBufCreateSize(4000); if (ret->conv == NULL) { xmlBufFree(ret->buffer); xmlFree(ret); return(NULL); } /* * This call is designed to initiate the encoder state */ xmlCharEncOutput(ret, 1); } else ret->conv = NULL; ret->writecallback = NULL; ret->closecallback = NULL; ret->context = NULL; ret->written = 0; return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlFreeParserInputBuffer: * @in: a buffered parser input * * Free up the memory used by a buffered parser input */ void xmlFreeParserInputBuffer(xmlParserInputBufferPtr in) { if (in == NULL) return; if (in->raw) { xmlBufFree(in->raw); in->raw = NULL; } if (in->encoder != NULL) { xmlCharEncCloseFunc(in->encoder); } if (in->closecallback != NULL) { in->closecallback(in->context); } if (in->buffer != NULL) { xmlBufFree(in->buffer); in->buffer = NULL; } xmlFree(in); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlOutputBufferClose: * @out: a buffered output * * flushes and close the output I/O channel * and free up all the associated resources * * Returns the number of byte written or -1 in case of error. */ int xmlOutputBufferClose(xmlOutputBufferPtr out) { int written; int err_rc = 0; if (out == NULL) return (-1); if (out->writecallback != NULL) xmlOutputBufferFlush(out); if (out->closecallback != NULL) { err_rc = out->closecallback(out->context); } written = out->written; if (out->conv) { xmlBufFree(out->conv); out->conv = NULL; } if (out->encoder != NULL) { xmlCharEncCloseFunc(out->encoder); } if (out->buffer != NULL) { xmlBufFree(out->buffer); out->buffer = NULL; } if (out->error) err_rc = -1; xmlFree(out); return ((err_rc == 0) ? written : err_rc); } #endif /* LIBXML_OUTPUT_ENABLED */ xmlParserInputBufferPtr __xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; int i = 0; void *context = NULL; if (xmlInputCallbackInitialized == 0) xmlRegisterDefaultInputCallbacks(); if (URI == NULL) return(NULL); /* * Try to find one of the input accept method accepting that scheme * Go in reverse to give precedence to user defined handlers. */ if (context == NULL) { for (i = xmlInputCallbackNr - 1;i >= 0;i--) { if ((xmlInputCallbackTable[i].matchcallback != NULL) && (xmlInputCallbackTable[i].matchcallback(URI) != 0)) { context = xmlInputCallbackTable[i].opencallback(URI); if (context != NULL) { break; } } } } if (context == NULL) { return(NULL); } /* * Allocate the Input buffer front-end. */ ret = xmlAllocParserInputBuffer(enc); if (ret != NULL) { ret->context = context; ret->readcallback = xmlInputCallbackTable[i].readcallback; ret->closecallback = xmlInputCallbackTable[i].closecallback; #ifdef LIBXML_ZLIB_ENABLED if ((xmlInputCallbackTable[i].opencallback == xmlGzfileOpen) && (strcmp(URI, "-") != 0)) { #if defined(ZLIB_VERNUM) && ZLIB_VERNUM >= 0x1230 ret->compressed = !gzdirect(context); #else if (((z_stream *)context)->avail_in > 4) { char *cptr, buff4[4]; cptr = (char *) ((z_stream *)context)->next_in; if (gzread(context, buff4, 4) == 4) { if (strncmp(buff4, cptr, 4) == 0) ret->compressed = 0; else ret->compressed = 1; gzrewind(context); } } #endif } #endif #ifdef LIBXML_LZMA_ENABLED if ((xmlInputCallbackTable[i].opencallback == xmlXzfileOpen) && (strcmp(URI, "-") != 0)) { ret->compressed = __libxml2_xzcompressed(context); } #endif } else xmlInputCallbackTable[i].closecallback (context); return(ret); } /** * xmlParserInputBufferCreateFilename: * @URI: a C string containing the URI or filename * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing of a file * If filename is "-' then we use stdin as the input. * Automatic support for ZLIB/Compress compressed document is provided * by default if found at compile-time. * Do an encoding check if enc == XML_CHAR_ENCODING_NONE * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) { if ((xmlParserInputBufferCreateFilenameValue)) { return xmlParserInputBufferCreateFilenameValue(URI, enc); } return __xmlParserInputBufferCreateFilename(URI, enc); } #ifdef LIBXML_OUTPUT_ENABLED xmlOutputBufferPtr __xmlOutputBufferCreateFilename(const char *URI, xmlCharEncodingHandlerPtr encoder, int compression ATTRIBUTE_UNUSED) { xmlOutputBufferPtr ret; xmlURIPtr puri; int i = 0; void *context = NULL; char *unescaped = NULL; #ifdef LIBXML_ZLIB_ENABLED int is_file_uri = 1; #endif if (xmlOutputCallbackInitialized == 0) xmlRegisterDefaultOutputCallbacks(); if (URI == NULL) return(NULL); puri = xmlParseURI(URI); if (puri != NULL) { #ifdef LIBXML_ZLIB_ENABLED if ((puri->scheme != NULL) && (!xmlStrEqual(BAD_CAST puri->scheme, BAD_CAST "file"))) is_file_uri = 0; #endif /* * try to limit the damages of the URI unescaping code. */ if ((puri->scheme == NULL) || (xmlStrEqual(BAD_CAST puri->scheme, BAD_CAST "file"))) unescaped = xmlURIUnescapeString(URI, 0, NULL); xmlFreeURI(puri); } /* * Try to find one of the output accept method accepting that scheme * Go in reverse to give precedence to user defined handlers. * try with an unescaped version of the URI */ if (unescaped != NULL) { #ifdef LIBXML_ZLIB_ENABLED if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) { context = xmlGzfileOpenW(unescaped, compression); if (context != NULL) { ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = context; ret->writecallback = xmlGzfileWrite; ret->closecallback = xmlGzfileClose; } xmlFree(unescaped); return(ret); } } #endif for (i = xmlOutputCallbackNr - 1;i >= 0;i--) { if ((xmlOutputCallbackTable[i].matchcallback != NULL) && (xmlOutputCallbackTable[i].matchcallback(unescaped) != 0)) { #if defined(LIBXML_HTTP_ENABLED) && defined(LIBXML_ZLIB_ENABLED) /* Need to pass compression parameter into HTTP open calls */ if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch) context = xmlIOHTTPOpenW(unescaped, compression); else #endif context = xmlOutputCallbackTable[i].opencallback(unescaped); if (context != NULL) break; } } xmlFree(unescaped); } /* * If this failed try with a non-escaped URI this may be a strange * filename */ if (context == NULL) { #ifdef LIBXML_ZLIB_ENABLED if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) { context = xmlGzfileOpenW(URI, compression); if (context != NULL) { ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = context; ret->writecallback = xmlGzfileWrite; ret->closecallback = xmlGzfileClose; } else xmlGzfileClose(context); return(ret); } } #endif for (i = xmlOutputCallbackNr - 1;i >= 0;i--) { if ((xmlOutputCallbackTable[i].matchcallback != NULL) && (xmlOutputCallbackTable[i].matchcallback(URI) != 0)) { #if defined(LIBXML_HTTP_ENABLED) && defined(LIBXML_ZLIB_ENABLED) /* Need to pass compression parameter into HTTP open calls */ if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch) context = xmlIOHTTPOpenW(URI, compression); else #endif context = xmlOutputCallbackTable[i].opencallback(URI); if (context != NULL) break; } } } if (context == NULL) { return(NULL); } /* * Allocate the Output buffer front-end. */ ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = context; ret->writecallback = xmlOutputCallbackTable[i].writecallback; ret->closecallback = xmlOutputCallbackTable[i].closecallback; } return(ret); } /** * xmlOutputBufferCreateFilename: * @URI: a C string containing the URI or filename * @encoder: the encoding converter or NULL * @compression: the compression ration (0 none, 9 max). * * Create a buffered output for the progressive saving of a file * If filename is "-' then we use stdout as the output. * Automatic support for ZLIB/Compress compressed document is provided * by default if found at compile-time. * TODO: currently if compression is set, the library only support * writing to a local file. * * Returns the new output or NULL */ xmlOutputBufferPtr xmlOutputBufferCreateFilename(const char *URI, xmlCharEncodingHandlerPtr encoder, int compression ATTRIBUTE_UNUSED) { if ((xmlOutputBufferCreateFilenameValue)) { return xmlOutputBufferCreateFilenameValue(URI, encoder, compression); } return __xmlOutputBufferCreateFilename(URI, encoder, compression); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlParserInputBufferCreateFile: * @file: a FILE* * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing of a FILE * * buffered C I/O * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateFile(FILE *file, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; if (xmlInputCallbackInitialized == 0) xmlRegisterDefaultInputCallbacks(); if (file == NULL) return(NULL); ret = xmlAllocParserInputBuffer(enc); if (ret != NULL) { ret->context = file; ret->readcallback = xmlFileRead; ret->closecallback = xmlFileFlush; } return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlOutputBufferCreateFile: * @file: a FILE* * @encoder: the encoding converter or NULL * * Create a buffered output for the progressive saving to a FILE * * buffered C I/O * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlOutputBufferCreateFile(FILE *file, xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; if (xmlOutputCallbackInitialized == 0) xmlRegisterDefaultOutputCallbacks(); if (file == NULL) return(NULL); ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = file; ret->writecallback = xmlFileWrite; ret->closecallback = xmlFileFlush; } return(ret); } /** * xmlOutputBufferCreateBuffer: * @buffer: a xmlBufferPtr * @encoder: the encoding converter or NULL * * Create a buffered output for the progressive saving to a xmlBuffer * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlOutputBufferCreateBuffer(xmlBufferPtr buffer, xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; if (buffer == NULL) return(NULL); ret = xmlOutputBufferCreateIO(xmlBufferWrite, NULL, (void *) buffer, encoder); return(ret); } /** * xmlOutputBufferGetContent: * @out: an xmlOutputBufferPtr * * Gives a pointer to the data currently held in the output buffer * * Returns a pointer to the data or NULL in case of error */ const xmlChar * xmlOutputBufferGetContent(xmlOutputBufferPtr out) { if ((out == NULL) || (out->buffer == NULL)) return(NULL); return(xmlBufContent(out->buffer)); } /** * xmlOutputBufferGetSize: * @out: an xmlOutputBufferPtr * * Gives the length of the data currently held in the output buffer * * Returns 0 in case or error or no data is held, the size otherwise */ size_t xmlOutputBufferGetSize(xmlOutputBufferPtr out) { if ((out == NULL) || (out->buffer == NULL)) return(0); return(xmlBufUse(out->buffer)); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlParserInputBufferCreateFd: * @fd: a file descriptor number * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing for the input * from a file descriptor * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateFd(int fd, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; if (fd < 0) return(NULL); ret = xmlAllocParserInputBuffer(enc); if (ret != NULL) { ret->context = (void *) (ptrdiff_t) fd; ret->readcallback = xmlFdRead; ret->closecallback = xmlFdClose; } return(ret); } /** * xmlParserInputBufferCreateMem: * @mem: the memory input * @size: the length of the memory block * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing for the input * from a memory area. * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateMem(const char *mem, int size, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; int errcode; if (size < 0) return(NULL); if (mem == NULL) return(NULL); ret = xmlAllocParserInputBuffer(enc); if (ret != NULL) { ret->context = (void *) mem; ret->readcallback = xmlInputReadCallbackNop; ret->closecallback = NULL; errcode = xmlBufAdd(ret->buffer, (const xmlChar *) mem, size); if (errcode != 0) { xmlFree(ret); return(NULL); } } return(ret); } /** * xmlParserInputBufferCreateStatic: * @mem: the memory input * @size: the length of the memory block * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing for the input * from an immutable memory area. This will not copy the memory area to * the buffer, but the memory is expected to be available until the end of * the parsing, this is useful for example when using mmap'ed file. * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateStatic(const char *mem, int size, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; if (size < 0) return(NULL); if (mem == NULL) return(NULL); ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer)); if (ret == NULL) { xmlIOErrMemory("creating input buffer"); return(NULL); } memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer)); ret->buffer = xmlBufCreateStatic((void *)mem, (size_t) size); if (ret->buffer == NULL) { xmlFree(ret); return(NULL); } ret->encoder = xmlGetCharEncodingHandler(enc); if (ret->encoder != NULL) ret->raw = xmlBufCreateSize(2 * xmlDefaultBufferSize); else ret->raw = NULL; ret->compressed = -1; ret->context = (void *) mem; ret->readcallback = NULL; ret->closecallback = NULL; return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlOutputBufferCreateFd: * @fd: a file descriptor number * @encoder: the encoding converter or NULL * * Create a buffered output for the progressive saving * to a file descriptor * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlOutputBufferCreateFd(int fd, xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; if (fd < 0) return(NULL); ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = (void *) (ptrdiff_t) fd; ret->writecallback = xmlFdWrite; ret->closecallback = NULL; } return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlParserInputBufferCreateIO: * @ioread: an I/O read function * @ioclose: an I/O close function * @ioctx: an I/O handler * @enc: the charset encoding if known * * Create a buffered parser input for the progressive parsing for the input * from an I/O handler * * Returns the new parser input or NULL */ xmlParserInputBufferPtr xmlParserInputBufferCreateIO(xmlInputReadCallback ioread, xmlInputCloseCallback ioclose, void *ioctx, xmlCharEncoding enc) { xmlParserInputBufferPtr ret; if (ioread == NULL) return(NULL); ret = xmlAllocParserInputBuffer(enc); if (ret != NULL) { ret->context = (void *) ioctx; ret->readcallback = ioread; ret->closecallback = ioclose; } return(ret); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlOutputBufferCreateIO: * @iowrite: an I/O write function * @ioclose: an I/O close function * @ioctx: an I/O handler * @encoder: the charset encoding if known * * Create a buffered output for the progressive saving * to an I/O handler * * Returns the new parser output or NULL */ xmlOutputBufferPtr xmlOutputBufferCreateIO(xmlOutputWriteCallback iowrite, xmlOutputCloseCallback ioclose, void *ioctx, xmlCharEncodingHandlerPtr encoder) { xmlOutputBufferPtr ret; if (iowrite == NULL) return(NULL); ret = xmlAllocOutputBufferInternal(encoder); if (ret != NULL) { ret->context = (void *) ioctx; ret->writecallback = iowrite; ret->closecallback = ioclose; } return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlParserInputBufferCreateFilenameDefault: * @func: function pointer to the new ParserInputBufferCreateFilenameFunc * * Registers a callback for URI input file handling * * Returns the old value of the registration function */ xmlParserInputBufferCreateFilenameFunc xmlParserInputBufferCreateFilenameDefault(xmlParserInputBufferCreateFilenameFunc func) { xmlParserInputBufferCreateFilenameFunc old = xmlParserInputBufferCreateFilenameValue; if (old == NULL) { old = __xmlParserInputBufferCreateFilename; } xmlParserInputBufferCreateFilenameValue = func; return(old); } /** * xmlOutputBufferCreateFilenameDefault: * @func: function pointer to the new OutputBufferCreateFilenameFunc * * Registers a callback for URI output file handling * * Returns the old value of the registration function */ xmlOutputBufferCreateFilenameFunc xmlOutputBufferCreateFilenameDefault(xmlOutputBufferCreateFilenameFunc func) { xmlOutputBufferCreateFilenameFunc old = xmlOutputBufferCreateFilenameValue; #ifdef LIBXML_OUTPUT_ENABLED if (old == NULL) { old = __xmlOutputBufferCreateFilename; } #endif xmlOutputBufferCreateFilenameValue = func; return(old); } /** * xmlParserInputBufferPush: * @in: a buffered parser input * @len: the size in bytes of the array. * @buf: an char array * * Push the content of the arry in the input buffer * This routine handle the I18N transcoding to internal UTF-8 * This is used when operating the parser in progressive (push) mode. * * Returns the number of chars read and stored in the buffer, or -1 * in case of error. */ int xmlParserInputBufferPush(xmlParserInputBufferPtr in, int len, const char *buf) { int nbchars = 0; int ret; if (len < 0) return(0); if ((in == NULL) || (in->error)) return(-1); if (in->encoder != NULL) { unsigned int use; /* * Store the data in the incoming raw buffer */ if (in->raw == NULL) { in->raw = xmlBufCreate(); } ret = xmlBufAdd(in->raw, (const xmlChar *) buf, len); if (ret != 0) return(-1); /* * convert as much as possible to the parser reading buffer. */ use = xmlBufUse(in->raw); nbchars = xmlCharEncInput(in, 1); if (nbchars < 0) { xmlIOErr(XML_IO_ENCODER, NULL); in->error = XML_IO_ENCODER; return(-1); } in->rawconsumed += (use - xmlBufUse(in->raw)); } else { nbchars = len; ret = xmlBufAdd(in->buffer, (xmlChar *) buf, nbchars); if (ret != 0) return(-1); } #ifdef DEBUG_INPUT xmlGenericError(xmlGenericErrorContext, "I/O: pushed %d chars, buffer %d/%d\n", nbchars, xmlBufUse(in->buffer), xmlBufLength(in->buffer)); #endif return(nbchars); } /** * endOfInput: * * When reading from an Input channel indicated end of file or error * don't reread from it again. */ static int endOfInput (void * context ATTRIBUTE_UNUSED, char * buffer ATTRIBUTE_UNUSED, int len ATTRIBUTE_UNUSED) { return(0); } /** * xmlParserInputBufferGrow: * @in: a buffered parser input * @len: indicative value of the amount of chars to read * * Grow up the content of the input buffer, the old data are preserved * This routine handle the I18N transcoding to internal UTF-8 * This routine is used when operating the parser in normal (pull) mode * * TODO: one should be able to remove one extra copy by copying directly * onto in->buffer or in->raw * * Returns the number of chars read and stored in the buffer, or -1 * in case of error. */ int xmlParserInputBufferGrow(xmlParserInputBufferPtr in, int len) { char *buffer = NULL; int res = 0; int nbchars = 0; if ((in == NULL) || (in->error)) return(-1); if ((len <= MINLEN) && (len != 4)) len = MINLEN; if (xmlBufAvail(in->buffer) <= 0) { xmlIOErr(XML_IO_BUFFER_FULL, NULL); in->error = XML_IO_BUFFER_FULL; return(-1); } if (xmlBufGrow(in->buffer, len + 1) < 0) { xmlIOErrMemory("growing input buffer"); in->error = XML_ERR_NO_MEMORY; return(-1); } buffer = (char *)xmlBufEnd(in->buffer); /* * Call the read method for this I/O type. */ if (in->readcallback != NULL) { res = in->readcallback(in->context, &buffer[0], len); if (res <= 0) in->readcallback = endOfInput; } else { xmlIOErr(XML_IO_NO_INPUT, NULL); in->error = XML_IO_NO_INPUT; return(-1); } if (res < 0) { return(-1); } /* * try to establish compressed status of input if not done already */ if (in->compressed == -1) { #ifdef LIBXML_LZMA_ENABLED if (in->readcallback == xmlXzfileRead) in->compressed = __libxml2_xzcompressed(in->context); #endif } len = res; if (in->encoder != NULL) { unsigned int use; /* * Store the data in the incoming raw buffer */ if (in->raw == NULL) { in->raw = xmlBufCreate(); } res = xmlBufAdd(in->raw, (const xmlChar *) buffer, len); if (res != 0) return(-1); /* * convert as much as possible to the parser reading buffer. */ use = xmlBufUse(in->raw); nbchars = xmlCharEncInput(in, 1); if (nbchars < 0) { xmlIOErr(XML_IO_ENCODER, NULL); in->error = XML_IO_ENCODER; return(-1); } in->rawconsumed += (use - xmlBufUse(in->raw)); } else { nbchars = len; xmlBufAddLen(in->buffer, nbchars); } #ifdef DEBUG_INPUT xmlGenericError(xmlGenericErrorContext, "I/O: read %d chars, buffer %d\n", nbchars, xmlBufUse(in->buffer)); #endif return(nbchars); } /** * xmlParserInputBufferRead: * @in: a buffered parser input * @len: indicative value of the amount of chars to read * * Refresh the content of the input buffer, the old data are considered * consumed * This routine handle the I18N transcoding to internal UTF-8 * * Returns the number of chars read and stored in the buffer, or -1 * in case of error. */ int xmlParserInputBufferRead(xmlParserInputBufferPtr in, int len) { if ((in == NULL) || (in->error)) return(-1); if (in->readcallback != NULL) return(xmlParserInputBufferGrow(in, len)); else if (xmlBufGetAllocationScheme(in->buffer) == XML_BUFFER_ALLOC_IMMUTABLE) return(0); else return(-1); } #ifdef LIBXML_OUTPUT_ENABLED /** * xmlOutputBufferWrite: * @out: a buffered parser output * @len: the size in bytes of the array. * @buf: an char array * * Write the content of the array in the output I/O buffer * This routine handle the I18N transcoding from internal UTF-8 * The buffer is lossless, i.e. will store in case of partial * or delayed writes. * * Returns the number of chars immediately written, or -1 * in case of error. */ int xmlOutputBufferWrite(xmlOutputBufferPtr out, int len, const char *buf) { int nbchars = 0; /* number of chars to output to I/O */ int ret; /* return from function call */ int written = 0; /* number of char written to I/O so far */ int chunk; /* number of byte current processed from buf */ if ((out == NULL) || (out->error)) return(-1); if (len < 0) return(0); if (out->error) return(-1); do { chunk = len; if (chunk > 4 * MINLEN) chunk = 4 * MINLEN; /* * first handle encoding stuff. */ if (out->encoder != NULL) { /* * Store the data in the incoming raw buffer */ if (out->conv == NULL) { out->conv = xmlBufCreate(); } ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk); if (ret != 0) return(-1); if ((xmlBufUse(out->buffer) < MINLEN) && (chunk == len)) goto done; /* * convert as much as possible to the parser reading buffer. */ ret = xmlCharEncOutput(out, 0); if ((ret < 0) && (ret != -3)) { xmlIOErr(XML_IO_ENCODER, NULL); out->error = XML_IO_ENCODER; return(-1); } if (out->writecallback) nbchars = xmlBufUse(out->conv); else nbchars = ret >= 0 ? ret : 0; } else { ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk); if (ret != 0) return(-1); if (out->writecallback) nbchars = xmlBufUse(out->buffer); else nbchars = chunk; } buf += chunk; len -= chunk; if (out->writecallback) { if ((nbchars < MINLEN) && (len <= 0)) goto done; /* * second write the stuff to the I/O channel */ if (out->encoder != NULL) { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->conv), nbchars); if (ret >= 0) xmlBufShrink(out->conv, ret); } else { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->buffer), nbchars); if (ret >= 0) xmlBufShrink(out->buffer, ret); } if (ret < 0) { xmlIOErr(XML_IO_WRITE, NULL); out->error = XML_IO_WRITE; return(ret); } if (out->written > INT_MAX - ret) out->written = INT_MAX; else out->written += ret; } written += nbchars; } while (len > 0); done: #ifdef DEBUG_INPUT xmlGenericError(xmlGenericErrorContext, "I/O: wrote %d chars\n", written); #endif return(written); } /** * xmlEscapeContent: * @out: a pointer to an array of bytes to store the result * @outlen: the length of @out * @in: a pointer to an array of unescaped UTF-8 bytes * @inlen: the length of @in * * Take a block of UTF-8 chars in and escape them. * Returns 0 if success, or -1 otherwise * The value of @inlen after return is the number of octets consumed * if the return value is positive, else unpredictable. * The value of @outlen after return is the number of octets consumed. */ static int xmlEscapeContent(unsigned char* out, int *outlen, const xmlChar* in, int *inlen) { unsigned char* outstart = out; const unsigned char* base = in; unsigned char* outend = out + *outlen; const unsigned char* inend; inend = in + (*inlen); while ((in < inend) && (out < outend)) { if (*in == '<') { if (outend - out < 4) break; *out++ = '&'; *out++ = 'l'; *out++ = 't'; *out++ = ';'; } else if (*in == '>') { if (outend - out < 4) break; *out++ = '&'; *out++ = 'g'; *out++ = 't'; *out++ = ';'; } else if (*in == '&') { if (outend - out < 5) break; *out++ = '&'; *out++ = 'a'; *out++ = 'm'; *out++ = 'p'; *out++ = ';'; } else if (*in == '\r') { if (outend - out < 5) break; *out++ = '&'; *out++ = '#'; *out++ = '1'; *out++ = '3'; *out++ = ';'; } else { *out++ = (unsigned char) *in; } ++in; } *outlen = out - outstart; *inlen = in - base; return(0); } /** * xmlOutputBufferWriteEscape: * @out: a buffered parser output * @str: a zero terminated UTF-8 string * @escaping: an optional escaping function (or NULL) * * Write the content of the string in the output I/O buffer * This routine escapes the characters and then handle the I18N * transcoding from internal UTF-8 * The buffer is lossless, i.e. will store in case of partial * or delayed writes. * * Returns the number of chars immediately written, or -1 * in case of error. */ int xmlOutputBufferWriteEscape(xmlOutputBufferPtr out, const xmlChar *str, xmlCharEncodingOutputFunc escaping) { int nbchars = 0; /* number of chars to output to I/O */ int ret; /* return from function call */ int written = 0; /* number of char written to I/O so far */ int oldwritten=0;/* loop guard */ int chunk; /* number of byte currently processed from str */ int len; /* number of bytes in str */ int cons; /* byte from str consumed */ if ((out == NULL) || (out->error) || (str == NULL) || (out->buffer == NULL) || (xmlBufGetAllocationScheme(out->buffer) == XML_BUFFER_ALLOC_IMMUTABLE)) return(-1); len = strlen((const char *)str); if (len < 0) return(0); if (out->error) return(-1); if (escaping == NULL) escaping = xmlEscapeContent; do { oldwritten = written; /* * how many bytes to consume and how many bytes to store. */ cons = len; chunk = xmlBufAvail(out->buffer) - 1; /* * make sure we have enough room to save first, if this is * not the case force a flush, but make sure we stay in the loop */ if (chunk < 40) { if (xmlBufGrow(out->buffer, 100) < 0) return(-1); oldwritten = -1; continue; } /* * first handle encoding stuff. */ if (out->encoder != NULL) { /* * Store the data in the incoming raw buffer */ if (out->conv == NULL) { out->conv = xmlBufCreate(); } ret = escaping(xmlBufEnd(out->buffer) , &chunk, str, &cons); if ((ret < 0) || (chunk == 0)) /* chunk==0 => nothing done */ return(-1); xmlBufAddLen(out->buffer, chunk); if ((xmlBufUse(out->buffer) < MINLEN) && (cons == len)) goto done; /* * convert as much as possible to the output buffer. */ ret = xmlCharEncOutput(out, 0); if ((ret < 0) && (ret != -3)) { xmlIOErr(XML_IO_ENCODER, NULL); out->error = XML_IO_ENCODER; return(-1); } if (out->writecallback) nbchars = xmlBufUse(out->conv); else nbchars = ret >= 0 ? ret : 0; } else { ret = escaping(xmlBufEnd(out->buffer), &chunk, str, &cons); if ((ret < 0) || (chunk == 0)) /* chunk==0 => nothing done */ return(-1); xmlBufAddLen(out->buffer, chunk); if (out->writecallback) nbchars = xmlBufUse(out->buffer); else nbchars = chunk; } str += cons; len -= cons; if (out->writecallback) { if ((nbchars < MINLEN) && (len <= 0)) goto done; /* * second write the stuff to the I/O channel */ if (out->encoder != NULL) { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->conv), nbchars); if (ret >= 0) xmlBufShrink(out->conv, ret); } else { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->buffer), nbchars); if (ret >= 0) xmlBufShrink(out->buffer, ret); } if (ret < 0) { xmlIOErr(XML_IO_WRITE, NULL); out->error = XML_IO_WRITE; return(ret); } if (out->written > INT_MAX - ret) out->written = INT_MAX; else out->written += ret; } else if (xmlBufAvail(out->buffer) < MINLEN) { xmlBufGrow(out->buffer, MINLEN); } written += nbchars; } while ((len > 0) && (oldwritten != written)); done: #ifdef DEBUG_INPUT xmlGenericError(xmlGenericErrorContext, "I/O: wrote %d chars\n", written); #endif return(written); } /** * xmlOutputBufferWriteString: * @out: a buffered parser output * @str: a zero terminated C string * * Write the content of the string in the output I/O buffer * This routine handle the I18N transcoding from internal UTF-8 * The buffer is lossless, i.e. will store in case of partial * or delayed writes. * * Returns the number of chars immediately written, or -1 * in case of error. */ int xmlOutputBufferWriteString(xmlOutputBufferPtr out, const char *str) { int len; if ((out == NULL) || (out->error)) return(-1); if (str == NULL) return(-1); len = strlen(str); if (len > 0) return(xmlOutputBufferWrite(out, len, str)); return(len); } /** * xmlOutputBufferFlush: * @out: a buffered output * * flushes the output I/O channel * * Returns the number of byte written or -1 in case of error. */ int xmlOutputBufferFlush(xmlOutputBufferPtr out) { int nbchars = 0, ret = 0; if ((out == NULL) || (out->error)) return(-1); /* * first handle encoding stuff. */ if ((out->conv != NULL) && (out->encoder != NULL)) { /* * convert as much as possible to the parser output buffer. */ do { nbchars = xmlCharEncOutput(out, 0); if (nbchars < 0) { xmlIOErr(XML_IO_ENCODER, NULL); out->error = XML_IO_ENCODER; return(-1); } } while (nbchars); } /* * second flush the stuff to the I/O channel */ if ((out->conv != NULL) && (out->encoder != NULL) && (out->writecallback != NULL)) { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->conv), xmlBufUse(out->conv)); if (ret >= 0) xmlBufShrink(out->conv, ret); } else if (out->writecallback != NULL) { ret = out->writecallback(out->context, (const char *)xmlBufContent(out->buffer), xmlBufUse(out->buffer)); if (ret >= 0) xmlBufShrink(out->buffer, ret); } if (ret < 0) { xmlIOErr(XML_IO_FLUSH, NULL); out->error = XML_IO_FLUSH; return(ret); } if (out->written > INT_MAX - ret) out->written = INT_MAX; else out->written += ret; #ifdef DEBUG_INPUT xmlGenericError(xmlGenericErrorContext, "I/O: flushed %d chars\n", ret); #endif return(ret); } #endif /* LIBXML_OUTPUT_ENABLED */ /** * xmlParserGetDirectory: * @filename: the path to a file * * lookup the directory for that file * * Returns a new allocated string containing the directory, or NULL. */ char * xmlParserGetDirectory(const char *filename) { char *ret = NULL; char dir[1024]; char *cur; #ifdef _WIN32_WCE /* easy way by now ... wince does not have dirs! */ return NULL; #endif if (xmlInputCallbackInitialized == 0) xmlRegisterDefaultInputCallbacks(); if (filename == NULL) return(NULL); #if defined(_WIN32) && !defined(__CYGWIN__) # define IS_XMLPGD_SEP(ch) ((ch=='/')||(ch=='\\')) #else # define IS_XMLPGD_SEP(ch) (ch=='/') #endif strncpy(dir, filename, 1023); dir[1023] = 0; cur = &dir[strlen(dir)]; while (cur > dir) { if (IS_XMLPGD_SEP(*cur)) break; cur --; } if (IS_XMLPGD_SEP(*cur)) { if (cur == dir) dir[1] = 0; else *cur = 0; ret = xmlMemStrdup(dir); } else { if (getcwd(dir, 1024) != NULL) { dir[1023] = 0; ret = xmlMemStrdup(dir); } } return(ret); #undef IS_XMLPGD_SEP } /**************************************************************** * * * External entities loading * * * ****************************************************************/ /** * xmlCheckHTTPInput: * @ctxt: an XML parser context * @ret: an XML parser input * * Check an input in case it was created from an HTTP stream, in that * case it will handle encoding and update of the base URL in case of * redirection. It also checks for HTTP errors in which case the input * is cleanly freed up and an appropriate error is raised in context * * Returns the input or NULL in case of HTTP error. */ xmlParserInputPtr xmlCheckHTTPInput(xmlParserCtxtPtr ctxt, xmlParserInputPtr ret) { #ifdef LIBXML_HTTP_ENABLED if ((ret != NULL) && (ret->buf != NULL) && (ret->buf->readcallback == xmlIOHTTPRead) && (ret->buf->context != NULL)) { const char *encoding; const char *redir; const char *mime; int code; code = xmlNanoHTTPReturnCode(ret->buf->context); if (code >= 400) { /* fatal error */ if (ret->filename != NULL) __xmlLoaderErr(ctxt, "failed to load HTTP resource \"%s\"\n", (const char *) ret->filename); else __xmlLoaderErr(ctxt, "failed to load HTTP resource\n", NULL); xmlFreeInputStream(ret); ret = NULL; } else { mime = xmlNanoHTTPMimeType(ret->buf->context); if ((xmlStrstr(BAD_CAST mime, BAD_CAST "/xml")) || (xmlStrstr(BAD_CAST mime, BAD_CAST "+xml"))) { encoding = xmlNanoHTTPEncoding(ret->buf->context); if (encoding != NULL) { xmlCharEncodingHandlerPtr handler; handler = xmlFindCharEncodingHandler(encoding); if (handler != NULL) { xmlSwitchInputEncoding(ctxt, ret, handler); } else { __xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING, "Unknown encoding %s", BAD_CAST encoding, NULL); } if (ret->encoding == NULL) ret->encoding = xmlStrdup(BAD_CAST encoding); } #if 0 } else if (xmlStrstr(BAD_CAST mime, BAD_CAST "html")) { #endif } redir = xmlNanoHTTPRedir(ret->buf->context); if (redir != NULL) { if (ret->filename != NULL) xmlFree((xmlChar *) ret->filename); if (ret->directory != NULL) { xmlFree((xmlChar *) ret->directory); ret->directory = NULL; } ret->filename = (char *) xmlStrdup((const xmlChar *) redir); } } } #endif return(ret); } static int xmlNoNetExists(const char *URL) { const char *path; if (URL == NULL) return(0); if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file://localhost/", 17)) #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &URL[17]; #else path = &URL[16]; #endif else if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file:///", 8)) { #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__) path = &URL[8]; #else path = &URL[7]; #endif } else path = URL; return xmlCheckFilename(path); } #ifdef LIBXML_CATALOG_ENABLED /** * xmlResolveResourceFromCatalog: * @URL: the URL for the entity to load * @ID: the System ID for the entity to load * @ctxt: the context in which the entity is called or NULL * * Resolves the URL and ID against the appropriate catalog. * This function is used by xmlDefaultExternalEntityLoader and * xmlNoNetExternalEntityLoader. * * Returns a new allocated URL, or NULL. */ static xmlChar * xmlResolveResourceFromCatalog(const char *URL, const char *ID, xmlParserCtxtPtr ctxt) { xmlChar *resource = NULL; xmlCatalogAllow pref; /* * If the resource doesn't exists as a file, * try to load it from the resource pointed in the catalogs */ pref = xmlCatalogGetDefaults(); if ((pref != XML_CATA_ALLOW_NONE) && (!xmlNoNetExists(URL))) { /* * Do a local lookup */ if ((ctxt != NULL) && (ctxt->catalogs != NULL) && ((pref == XML_CATA_ALLOW_ALL) || (pref == XML_CATA_ALLOW_DOCUMENT))) { resource = xmlCatalogLocalResolve(ctxt->catalogs, (const xmlChar *)ID, (const xmlChar *)URL); } /* * Try a global lookup */ if ((resource == NULL) && ((pref == XML_CATA_ALLOW_ALL) || (pref == XML_CATA_ALLOW_GLOBAL))) { resource = xmlCatalogResolve((const xmlChar *)ID, (const xmlChar *)URL); } if ((resource == NULL) && (URL != NULL)) resource = xmlStrdup((const xmlChar *) URL); /* * TODO: do an URI lookup on the reference */ if ((resource != NULL) && (!xmlNoNetExists((const char *)resource))) { xmlChar *tmp = NULL; if ((ctxt != NULL) && (ctxt->catalogs != NULL) && ((pref == XML_CATA_ALLOW_ALL) || (pref == XML_CATA_ALLOW_DOCUMENT))) { tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource); } if ((tmp == NULL) && ((pref == XML_CATA_ALLOW_ALL) || (pref == XML_CATA_ALLOW_GLOBAL))) { tmp = xmlCatalogResolveURI(resource); } if (tmp != NULL) { xmlFree(resource); resource = tmp; } } } return resource; } #endif /** * xmlDefaultExternalEntityLoader: * @URL: the URL for the entity to load * @ID: the System ID for the entity to load * @ctxt: the context in which the entity is called or NULL * * By default we don't load external entities, yet. * * Returns a new allocated xmlParserInputPtr, or NULL. */ static xmlParserInputPtr xmlDefaultExternalEntityLoader(const char *URL, const char *ID, xmlParserCtxtPtr ctxt) { xmlParserInputPtr ret = NULL; xmlChar *resource = NULL; #ifdef DEBUG_EXTERNAL_ENTITIES xmlGenericError(xmlGenericErrorContext, "xmlDefaultExternalEntityLoader(%s, xxx)\n", URL); #endif if ((ctxt != NULL) && (ctxt->options & XML_PARSE_NONET)) { int options = ctxt->options; ctxt->options -= XML_PARSE_NONET; ret = xmlNoNetExternalEntityLoader(URL, ID, ctxt); ctxt->options = options; return(ret); } #ifdef LIBXML_CATALOG_ENABLED resource = xmlResolveResourceFromCatalog(URL, ID, ctxt); #endif if (resource == NULL) resource = (xmlChar *) URL; if (resource == NULL) { if (ID == NULL) ID = "NULL"; __xmlLoaderErr(ctxt, "failed to load external entity \"%s\"\n", ID); return (NULL); } ret = xmlNewInputFromFile(ctxt, (const char *) resource); if ((resource != NULL) && (resource != (xmlChar *) URL)) xmlFree(resource); return (ret); } static xmlExternalEntityLoader xmlCurrentExternalEntityLoader = xmlDefaultExternalEntityLoader; /** * xmlSetExternalEntityLoader: * @f: the new entity resolver function * * Changes the defaultexternal entity resolver function for the application */ void xmlSetExternalEntityLoader(xmlExternalEntityLoader f) { xmlCurrentExternalEntityLoader = f; } /** * xmlGetExternalEntityLoader: * * Get the default external entity resolver function for the application * * Returns the xmlExternalEntityLoader function pointer */ xmlExternalEntityLoader xmlGetExternalEntityLoader(void) { return(xmlCurrentExternalEntityLoader); } /** * xmlLoadExternalEntity: * @URL: the URL for the entity to load * @ID: the Public ID for the entity to load * @ctxt: the context in which the entity is called or NULL * * Load an external entity, note that the use of this function for * unparsed entities may generate problems * * Returns the xmlParserInputPtr or NULL */ xmlParserInputPtr xmlLoadExternalEntity(const char *URL, const char *ID, xmlParserCtxtPtr ctxt) { if ((URL != NULL) && (xmlNoNetExists(URL) == 0)) { char *canonicFilename; xmlParserInputPtr ret; canonicFilename = (char *) xmlCanonicPath((const xmlChar *) URL); if (canonicFilename == NULL) { xmlIOErrMemory("building canonical path\n"); return(NULL); } ret = xmlCurrentExternalEntityLoader(canonicFilename, ID, ctxt); xmlFree(canonicFilename); return(ret); } return(xmlCurrentExternalEntityLoader(URL, ID, ctxt)); } /************************************************************************ * * * Disabling Network access * * * ************************************************************************/ /** * xmlNoNetExternalEntityLoader: * @URL: the URL for the entity to load * @ID: the System ID for the entity to load * @ctxt: the context in which the entity is called or NULL * * A specific entity loader disabling network accesses, though still * allowing local catalog accesses for resolution. * * Returns a new allocated xmlParserInputPtr, or NULL. */ xmlParserInputPtr xmlNoNetExternalEntityLoader(const char *URL, const char *ID, xmlParserCtxtPtr ctxt) { xmlParserInputPtr input = NULL; xmlChar *resource = NULL; #ifdef LIBXML_CATALOG_ENABLED resource = xmlResolveResourceFromCatalog(URL, ID, ctxt); #endif if (resource == NULL) resource = (xmlChar *) URL; if (resource != NULL) { if ((!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "ftp://", 6)) || (!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "http://", 7))) { xmlIOErr(XML_IO_NETWORK_ATTEMPT, (const char *) resource); if (resource != (xmlChar *) URL) xmlFree(resource); return(NULL); } } input = xmlDefaultExternalEntityLoader((const char *) resource, ID, ctxt); if (resource != (xmlChar *) URL) xmlFree(resource); return(input); } #define bottom_xmlIO #include "elfgcchack.h"