Cypress is unable to load site in v3.5.0 due to "Parse Error"

[tmonteith]

Current behavior:

When attempting to resolve our site, Cypress throws an error. This was not an issue on older versions of Cypress. Our NGINX config is fairly vanilla and hasnt changed since we deployed it several months ago

error

CypressError: cy.visit() failed trying to load:

https://our-website.test.com/search-page

We attempted to make an http request to this URL but the request failed without a response.

We received this error at the network level:

  > Error: Parse Error

Common situations why this would fail:
  - you don't have internet access
  - you forgot to run / boot your web server
  - your web server isn't accessible
  - you have weird network configuration settings on your computer

The stack trace for this error is:

Error: Parse Error
    at TLSSocket.socketOnData (_http_client.js:451:22)
    at TLSSocket.emit (events.js:194:13)
    at addChunk (_stream_readable.js:296:12)
    at readableAddChunk (_stream_readable.js:277:11)
    at TLSSocket.Readable.push (_stream_readable.js:232:10)
    at TLSWrap.onStreamRead (internal/stream_base_commons.js:165:17)


Because this error occurred during a 'before each' hook we are skipping the remaining tests in the current suite: 'Search Page tests'`

Desired behavior:

Our site loads on newer versions of Cypress (3.5.0) and up.

Steps to reproduce: (app code and test code)

example code:

/// <reference types="Cypress" />
describe('Search Page Tests', () => {
  beforeEach(() => {
    cy.visit('/search')
    })

    cy.get(`[data-qa='tabs-wrapper']`).get(`[data-qa='tab']`).contains('red').as('redButton')    
    cy.get(`[data-qa='tabs-wrapper']`).get('[data-qa="tab"]').contains('blue').as('blueButton')
  })

  it('visit the search page and search for buttons', () => {
    cy.getById('searchGoToHomeButton')
      .should('have.attr', 'href', '/home')
  });

Steps to reproduce.

npx cypress open

Click spec from GUI and let test start. Error is thrown immediately upon attempting to resolve the page.

Versions

v3.5.0

Cypress desktop, v3.5.0, MAcOS 10.13.6, Electron(Chrome v78)

[gabbersepp]

Which baseurl do you have set? Maybe there is a problem when cypress tries to redirect from http to https or something. Can you provide a simple example using a small express server + nginx + some cypress code?

[jennifer-shehane]

As @gabbersepp mentioned, we'll need a way to reproduce this in order to move forward with finding the problem - otherwise we will need to close the issue since there's no way for us to more forward debugging.

[tmonteith]

@gabbersepp and @jennifer-shehane I will compile the needed code to debug effectively.

[arifmasood]

We are also getting exactly same issue. With cypress version 3.4.1 every application works fine, however when we try to upgrade to latest versions (3.6.0+) then cypress is not able access the site (throwing the same error shared bytes @tmonteith ).

Apparently, something changed between 3.4.1 to latest versions of cypress that is causing issue. Note that we are also using ngnix and same configurations that work fine with c.ypress 3.4.1, do not work with cypress 3.6.0. @jennifer-shehane

[gabbersepp]

@arifmasood are you able to provide a small example? We are using nginx as reverse proxy and I updated to cypress 3.6.1 right now to test this setup. Runs without any problems.

Our nginx proxies the traffic from a https site to a local http IIS site, if this is relevant.

[arifmasood]

@gabbersepp I cannot share details of scripts or website over here, however I have already sent an email with some details to cypress support team.

[tmonteith]

@arifmasood thanks!

[cbarratt]

I'm seeing the same error (without nginx proxy), just a NextJS app running on http://localhost:3000

Interestingly it works fine on the latest version providing I run in Chrome and not the Electron browser

[sergiomap]

any updates here?

[flotwig]

@tmonteith I believe this is an "Parse Error" related to the Set-Cookie headers being sent from your server. Can you share the headers that your server sends here? It will help to shed some light on this issue.

---

All others in this thread - if you are still experiencing an issue in the latest Cypress, and you do not get a "Parse Error", please check for another issue that matches the error you are getting.

If you are getting the "Parse Error", please share your Set-Cookie headers to help debug.

[sergiomap]

I found a workaround. If I run it using NODE_OPTIONS=--max-http-header-size=1000000 before cypress run it works.