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blank page during visit #6191

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bahmutov opened this issue Jan 17, 2020 · 10 comments
Closed

blank page during visit #6191

bahmutov opened this issue Jan 17, 2020 · 10 comments

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@bahmutov
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bahmutov commented Jan 17, 2020 •
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Cypress v3.8.2 on MAc

Spec

describe('QA Admin', () => {
	it('Loads the auth page, not an empty frame', () => {
		cy.visit('https://redacted.alumniq.com/admin/index.cfm/login');
		cy.get('input');
	});
});

Page is blank

Notice the iframed document only has <head>...</head> element, no <body> at all.

See the following in the terminal (I have added a few line breaks to break the single string)

[11854:0117/162940.246364:ERROR:CONSOLE(0)] "Blocked script execution in 'data:text/html;charset=UTF-8,%3Chead%3E%20%3Cscript%20type='text/javascript'%3E%20document.domain%20=%20'alumniq.com';%20var%20Cypress%20=%20window.Cypress%20=%20parent.Cypress;
%20if%20
(!Cypress)%20%7B%20throw%20new%20Error('Something%20went%20terribly%20wrong%20and%20we%20cannot%20proceed.%20We%20expected%20to%20find%20the%20global%20Cypress
%20in%20the%20parent%20window%20but%20it%20is%20missing!.%20This%20should
%20never%20happen%20and%20likely%20is%20a%20bug.%20Please%20open%20an%20issue!');%20%7D;%20Cypress.action('app:window:before:load',%20window);
%20%3C/script%3E%20%3C/head%3E' because the document's frame is sandboxed 
and the 'allow-scripts' permission is not set.", source: data:text/html;charset=UTF-8,%3Chead%3E%20%3Cscript%20type='text/javascript'%3E%20document.domain%20=%20'
alumniq.com';%20var%20Cypress%20=%20window.Cypress%20=%20parent.Cypress;
%20if%20(!Cypress)%20%7B%20throw%20new%20Error('Something%20went%20terribly%20wrong%20and%20we%20cannot%20proceed.%20We%20expected%20to%20find%20the%20
global%20Cypress%20in%20the%20parent%20window%20but%20it%20is%20missing!.
%20This%20should%20never%20happen%20and%20likely%20is%20a%20bug.%20Please%
20open%20an%20issue!');%20%7D;%20Cypress.action('app:window:before:load',
%20window);%20%3C/script%3E%20%3C/head%3E (0)

Relevant error from the above text

Blocked script execution in 'data:text/html... '
because the document's frame is sandboxed  and the 'allow-scripts' permission 
is not set.", source: data:text/html;charset=UTF-...
@bahmutov
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bahmutov commented Jan 17, 2020 •
edited
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After playing some more, see this error in the DevTools console

@bahmutov
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bahmutov commented Jan 17, 2020 •
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By inspecting the document.domain between top and aut frames I see the difference

top.document.domain = foo.com

app document.domain = redacted.foo.com

@flotwig
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flotwig commented Jan 17, 2020

do they embed an iframe with the sandbox attribute? if so this sounds like another thing that #5273 could help with

@atuttle
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atuttle commented Jan 17, 2020

This ticket originated with my request for help on twitter/in gitter... @flotwig can you clarify your question? I don't follow. The page that we're attempting to load doesn't include any iframes (some parts of our application do, but we haven't gotten to writing tests for any of those screens yet.)

@bahmutov
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no, @flotwig I could not any iframes there - I think this message comes from aut iframe

@atuttle
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atuttle commented Jan 22, 2020

Is there anything I can do to assist in debugging?

@flotwig flotwig self-assigned this Jan 22, 2020
@atuttle
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atuttle commented Jan 24, 2020

I'll be offline for a week, starting tonight. If you need any more information or if you think making some changes could help, please contact my colleagues at helpdesk@alumniq.com

@cypress-bot cypress-bot bot added the stage: needs investigating Someone from Cypress needs to look at this label Apr 27, 2020
@villelahdenvuo
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This also happens to me randomly and I have to close Electron and restart the suite.

@jennifer-shehane
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I'm not able to recreate this issue with the code provided anymore.

Screen Shot 2020-08-12 at 2 28 33 PM

Unfortunately we have to close this issue as there is not enough information to reproduce the problem. This does not mean that your issue is not happening - it just means that we do not have a path to move forward.

Please comment in this issue with a reproducible example and we will consider reopening the issue.

@jennifer-shehane jennifer-shehane removed the stage: needs investigating Someone from Cypress needs to look at this label Aug 12, 2020
@villelahdenvuo
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In case anyone finds this issue, in my case the issue was caused by the experimentalFetchPolyfill setting. It worked fine in the beginning and I replaced my custom polyfill solution, however it started failing in a way that the first cy.visit command would work, but after that I would just get a blank screen and if I tried to retry it would get stuck on loading tests.

After I disabled that and installed a third party polyfill plugin: https://github.com/rckeller/cypress-unfetch it started working again.

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5 participants
@atuttle @villelahdenvuo @flotwig @jennifer-shehane @bahmutov