content-length header is lost under Cypress.

Current behavior

When using Cypress, no content-length header is returned. This error is not reproduced when using the functionality without Cypress.

Desired behavior

Content length is returned.

Test code to reproduce

git clone https://github.com/dvkruchinin/cvat.git
cd cvat
git checkout case77-for-cypress-issue
docker-compose -f docker-compose.yml -f docker-compose.dev.yml build
docker-compose up -d
docker exec -it cvat bash -ic 'python3 ~/manage.py createsuperuser'
user: admin
email: <can leave it empty>
password: 12qwaszx
cd tests
npm ci
npx cypress open

run the test actions_objects2/case_77_intelligent_scissors.js

For checking without Cypress: Open Chrome Go to http://localhost:8080 Login as admin password 12qwaszx And reproduce the actions from the test

Versions

Cypress version: 6.4.0, 7.3.0 Browser: Chome Version 90.0.4430.93 (Official Build) (64-bit) OS: 20.04.1-Ubuntu

[adi518]

Here’s an example, it goes in your Cypress code:

cy.intercept( 'GET', 'https://foobar.com/media.mp4', (req) => {
    req.continue((res) => {
      // monkey patch content-length, since cypress has a bug
      // where it won't pass this property to the response.
      const contentLength = 123456;
      res.headers['Content-Length'] = String(contentLength);
    });
  }
).as('mediaRequest');

Notice you’ll have to update it when you change your mock or things can/will break. I think it might be possible to make this seamless by reading your mock with fs.readFileSync and calculating the content length.

[masciugo]

I am experiencing the same problem. Thanks for the workaround but it I hope it will fixed