sentry/static/app/gettingStartedDocs/node/koa.tsx

import {StepType} from 'sentry/components/onboarding/gettingStartedDoc/step';
import {
  Docs,
  DocsParams,
  OnboardingConfig,
} from 'sentry/components/onboarding/gettingStartedDoc/types';
import {getUploadSourceMapsStep} from 'sentry/components/onboarding/gettingStartedDoc/utils';
import {getJSServerMetricsOnboarding} from 'sentry/components/onboarding/gettingStartedDoc/utils/metricsOnboarding';
import {ProductSolution} from 'sentry/components/onboarding/productSelection';
import {t, tct} from 'sentry/locale';
import {
  getDefaultNodeImports,
  getInstallConfig,
  ProductSelectionMap,
} from 'sentry/utils/gettingStartedDocs/node';

type Params = DocsParams;

const productSelection = (params: Params): ProductSelectionMap => {
  return {
    [ProductSolution.ERROR_MONITORING]: true,
    [ProductSolution.PROFILING]: params.isProfilingSelected,
    [ProductSolution.PERFORMANCE_MONITORING]: params.isPerformanceSelected,
    [ProductSolution.SESSION_REPLAY]: params.isReplaySelected,
  };
};

const getSdkSetupSnippet = (params: Params) => `
${getDefaultNodeImports({productSelection: productSelection(params)}).join('\n')}
import { stripUrlQueryAndFragment } from "@sentry/utils";
import Koa from "koa";

const app = new Koa();

Sentry.init({
  dsn: "${params.dsn}",
  integrations: [${
    params.isPerformanceSelected
      ? `
      // Automatically instrument Node.js libraries and frameworks
      ...Sentry.autoDiscoverNodePerformanceMonitoringIntegrations(),`
      : ''
  }${
    params.isProfilingSelected
      ? `
      new ProfilingIntegration(),`
      : ''
  }
],${
  params.isPerformanceSelected
    ? `
      // Performance Monitoring
      tracesSampleRate: 1.0, //  Capture 100% of the transactions`
    : ''
}${
  params.isProfilingSelected
    ? `
    // Set sampling rate for profiling - this is relative to tracesSampleRate
    profilesSampleRate: 1.0,`
    : ''
}
});${
  params.isPerformanceSelected
    ? `

const requestHandler = (ctx, next) => {
  return new Promise((resolve, reject) => {
    Sentry.runWithAsyncContext(async () => {
      const hub = Sentry.getCurrentHub();
      hub.configureScope((scope) =>
        scope.addEventProcessor((event) =>
          Sentry.addRequestDataToEvent(event, ctx.request, {
            include: {
              user: false,
            },
          })
        )
      );

      try {
        await next();
      } catch (err) {
        reject(err);
      }
      resolve();
    });
  });
};

// This tracing middleware creates a transaction per request
const tracingMiddleWare = async (ctx, next) => {
  const reqMethod = (ctx.method || "").toUpperCase();
  const reqUrl = ctx.url && stripUrlQueryAndFragment(ctx.url);

  // Connect to trace of upstream app
  let traceparentData;
  if (ctx.request.get("sentry-trace")) {
    traceparentData = Sentry.extractTraceparentData(
      ctx.request.get("sentry-trace")
    );
  }

  const transaction = Sentry.startTransaction({
    name: \`\${reqMethod} \${reqUrl}\`,
    op: "http.server",
    ...traceparentData,
  });

  ctx.__sentry_transaction = transaction;

  // We put the transaction on the scope so users can attach children to it
  Sentry.getCurrentHub().configureScope((scope) => {
    scope.setSpan(transaction);
  });

  ctx.res.on("finish", () => {
    // Push \`transaction.finish\` to the next event loop so open spans have a chance to finish before the transaction closes
    setImmediate(() => {
      // If you're using koa router, set the matched route as transaction name
      if (ctx._matchedRoute) {
        const mountPath = ctx.mountPath || "";
        transaction.setName(\`\${reqMethod} \${mountPath}\${ctx._matchedRoute}\`);
      }
      transaction.setHttpStatus(ctx.status);
      transaction.finish();
    });
  });

  await next();
};

app.use(requestHandler);
app.use(tracingMiddleWare);`
    : ''
}

// Send errors to Sentry
app.on("error", (err, ctx) => {
  Sentry.withScope((scope) => {
    scope.addEventProcessor((event) => {
      return Sentry.addRequestDataToEvent(event, ctx.request);
    });
    Sentry.captureException(err);
  });
});

app.listen(3000);`;

const getVerifySnippet = () => `
app.use(async function () {
  throw new Error("My first Sentry error!");
});
`;

const onboarding: OnboardingConfig = {
  install: params => [
    {
      type: StepType.INSTALL,
      description: t('Add the Sentry Node SDK as a dependency:'),
      configurations: getInstallConfig(params, {
        additionalPackages: params.isPerformanceSelected ? ['@sentry/utils'] : [],
      }),
    },
  ],
  configure: params => [
    {
      type: StepType.CONFIGURE,
      description: tct(
        "Initialize Sentry as early as possible in your application's lifecycle, for example in your [code:index.ts/js] entry point:",
        {code: <code />}
      ),
      configurations: [
        {
          language: 'javascript',
          code: getSdkSetupSnippet(params),
        },
      ],
    },
    getUploadSourceMapsStep({
      guideLink: 'https://docs.sentry.io/platforms/node/guides/koa/sourcemaps/',
      ...params,
    }),
  ],
  verify: () => [
    {
      type: StepType.VERIFY,
      description: t(
        "This snippet contains an intentional error and can be used as a test to make sure that everything's working as expected."
      ),
      configurations: [
        {
          language: 'javascript',
          code: getVerifySnippet(),
        },
      ],
    },
  ],
};

const docs: Docs = {
  onboarding,
  customMetricsOnboarding: getJSServerMetricsOnboarding(),
};

export default docs;