apitally/dist/common/response.js

Simple API monitoring & analytics for REST APIs built with Express, Fastify, NestJS, AdonisJS, Hono, H3, Elysia, Hapi, and Koa.

var __defProp = Object.defineProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
function captureResponse(response, { captureBody = false, maxBodySize = 0, readTimeout = 5e3 } = {}) {
  if (!response.body) {
    return [
      response,
      Promise.resolve({
        size: 0,
        completed: true
      })
    ];
  }
  let size = 0;
  let bodySizeLimitExceeded = false;
  let readStarted = false;
  const chunks = [];
  const { readable, writable } = new TransformStream({
    transform: /* @__PURE__ */ __name((chunk, controller) => {
      readStarted = true;
      size += chunk.byteLength;
      if (captureBody && !bodySizeLimitExceeded) {
        if (size > maxBodySize) {
          bodySizeLimitExceeded = true;
          chunks.length = 0;
        } else {
          chunks.push(chunk);
        }
      }
      controller.enqueue(chunk);
    }, "transform")
  });
  const pipePromise = response.body.pipeTo(writable).then(() => ({
    body: chunks.length > 0 ? Buffer.concat(chunks) : void 0,
    size,
    completed: true
  })).catch((error) => ({
    size,
    completed: false,
    error
  }));
  const timeoutPromise = new Promise((resolve) => setTimeout(() => {
    if (!readStarted) {
      resolve({
        size: 0,
        completed: false
      });
    }
  }, readTimeout));
  const racePromise = Promise.race([
    pipePromise,
    timeoutPromise
  ]);
  const newResponse = new Response(readable, {
    status: response.status,
    statusText: response.statusText,
    headers: response.headers
  });
  void newResponse.headers;
  return [
    newResponse,
    racePromise
  ];
}
__name(captureResponse, "captureResponse");
function getResponseJson(body) {
  if (body.length === 0) {
    return null;
  }
  try {
    return JSON.parse(body.toString());
  } catch (error) {
    return null;
  }
}
__name(getResponseJson, "getResponseJson");
export {
  captureResponse,
  getResponseJson
};
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