674186 - <pre>JSON</pre> in File upload response

Status: RESOLVED INVALID

(Core :: General, defect)

Description

[billy3321]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20100101 Firefox/5.0
Build ID: 20110622232440

Steps to reproduce:

Upload file and handler the json return.


Actual results:

After uploaded file, if the page return a json not in text/plain content, firefox will add <pre> tag automaticly.
Here has some information:
http://stackoverflow.com/questions/3939741/ajaxfileupload-syntaxerror-missing-in-xml-expression
http://www.sencha.com/forum/showthread.php?17248-lt-pre-gt-json-lt-pre-gt-in-File-upload-response-%28FF-only%29


Expected results:

The pre tag should not be added.

Comment 1

[Boris Zbarsky [:bzbarsky]]

So this script is loading a text/plain file in an iframe, then examining the innerHTML of that iframe and hoping to recover the original text?

The former will follow the steps at http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html#read-text which will in fact generate a <pre> tag in the DOM of that iframe.  Then the innerHTML will include the <pre> tag, of course.

Presumably the file uploader thing should be looking at .textContent, not .innerHTML.