1224981 - [e10s] Pretty printing and syntax highlight don't work if JS file causes 302-response-redirect (debugger doesn't get Content-Type)

Status: RESOLVED INVALID

(DevTools :: Debugger, defect)

Description

[arni2033]

Attachment: screenshot 1 - Pretty printing and syntax highlight don't work on some third-party JS if third-party cookies are forbidden.png

>>> My Info:   Win7_64, Nightly 45, 32bit, ID 20151113030248, new profile <<<
STR:
1. Open clear profile, forbid third-party cookies
 A) On about:preferences#privacy , 
 B) Create user.js (in profile folder) with the following line, then restart browser
>   user_pref("network.cookie.cookieBehavior", 1);
2. Open   https://www.yandex.ru/   or   https://ya.ru/
3. Open devtools -> Debugger, refresh the page
4. Click on a JS file from   "https://mc.yandex.ru"   which name consists of digits (e.g. 723233)

Result:
 The syntax isn't highlighted and JS file isn't pretty-printed. Pretty-print button doesn't work   =(

Expectations:
 It should "syntax-highlighted" and pretty-printed normally. Pretty-print button should work properly

Notes:
 If I forbid cookies, then netmonitor says that the file is downloaded twice. I can reproduce that 
 JS file by copypasting its location in url like this:     data:text/html,<script src="..."></script>

Comment 1

[arni2033]

>>>   CORRECTION   <<<
1.A) On about:preferences#privacy , set "Nightly will" -> "use custom settings for history",
     set "Accept third-party cookies" -> "Never".
     DO NOT set "Always use private browsing mode" - only apply settings I described.

Comment 2

[arni2033]

It appears to be e10s-only issue. It's presented since at least (2013-11-16)

Comment 3

[arni2033]

Hm, of course forbidden cookies aren't the case. It's just site behavior, a way to reproduce the bug.
The script has 302 state and returns another link in "Location" header. I hope this info will help to make a testcase which doesn't depend on Yandex stuff

Comment 4

[arni2033]

Attachment: screenshot 2 - [e10s] Pretty printing and syntax highlight don't work if JS file causes redirect.png

Comment 5

[arni2033]

Attachment: testcase 1 - Pretty printing and syntax highlight don't work if JS file causes redirect.htm

This testcase uses Wikipedia's redirect from http:// to https://.
Also, note that downloaded script in Netmonitor starts with "https:" while the script in Debugger starts with "http:". Maybe it's a part of some general issue.

Comment 6

[arni2033]

Comment on attachment 8688351 [details]
testcase 1 - Pretty printing and syntax highlight don't work if JS file causes redirect.htm

This testcase uses Wikipedia's redirect from http:// to https://. You must save the html preserving link to wikimedia.org. Do NOT "open testcase, then save it", because that'll save the script locally.
Once you saved it, do the following:
 1. Open the saved html file
 2. Open Netmonitor, then Debugger
 3. Reload page

Results:
 [e10s] Script url in Netmonitor starts with "https://" while url in Debugger starts with "http://"
 Script in Debugger is broken: syntax isn't highlighted, pretty-printing doesn't work.
 
 [non-e10s] Both urls start with "https://". Pretty-print and syntax highlight work OK

Comment 7

[arni2033]

Attachment: script 1 bug 1224981.js