Request interception continue method probably not working with POST method

I’m using Puppeteer 2.0.0 (Node.js v11.12.0) and want to perform a POST request. When running the following code:

const puppeteer = require("puppeteer");
const devices = require("puppeteer/DeviceDescriptors");

async function main() {
  const browser = await puppeteer.launch({
    args: ["--enable-features=NetworkService", "--no-sandbox"],
    ignoreHTTPSErrors: true
  });
  const page = await browser.newPage();

  await page.setRequestInterception(true);

  page.on("request", interceptedRequest => {
    const method = "POST", postData = "foo=FOO&bar=BAR";
    interceptedRequest.continue({ method, postData });
  });

  const response = await page.goto("https://postman-echo.com/post");

  console.log({
    url: response.url(),
    statusCode: response.status(),
    method: response.request().method(),
    body: await response.text()
  });

  setTimeout(async () => await browser.close(), 1000);
}

main();

I get statusCode: 200 and method: ‘GET’ like it wasn’t intercepted.

What is even more confusing - when I try to do it with CDP Session:

const puppeteer = require("puppeteer");
const devices = require("puppeteer/DeviceDescriptors");

async function main() {
  const browser = await puppeteer.launch({
    args: ["--enable-features=NetworkService", "--no-sandbox"],
    ignoreHTTPSErrors: true
  });
  const page = await browser.newPage();
  const session = await page.target().createCDPSession();

  await session.send( "Network.enable" );
  await session.send( "Network.setRequestInterception", {
      patterns: [{
        urlPattern: "*",
        interceptionStage: "HeadersReceived"
      }]
    });

  session.on( "Network.requestIntercepted", async ({ interceptionId, request, responseHeaders, resourceType }) => {

    await session.send( "Network.continueInterceptedRequest", {
      interceptionId,
      url: request.url,
      method: "POST",
      postData: "foo=FOO&bar=BAR"
    });
    session.detach();
  });

  const response = await page.goto("https://postman-echo.com/post");
  console.log({
    url: response.url(),
    statusCode: response.status(),
    method: response.request().method(),
    body: await response.text()
  });

  setTimeout(async () => await browser.close(), 1000);
}

main();

I get statusCode: 404 and method: ‘GET’

Am I doing something wrong or is it an issue with Puppeteer?

[dsheiko]

Oh, I see

  page.on("response", async( response ) => {
    console.log("response", await response.text() );
  });

prints the server response body with the POST parameters in it. Thanks.

[kblok]

response.request contains the original request being made. request.continue won’t alter the requests array. If you test that code using https://ptsv2.com/, you will see that you are getting posts on the other side.

const response = await page.goto("https://ptsv2.com/t/wr1pa-1575457987/post");