$.ajax POST in Firefox fails with a null data parameter

[garrett]

Firefox has a bug where it does not send a Content-Length of 0 in a post when the post's body is omitted. Ordinarily, this works well with popular webservers... however, Squid (and possibly other proxies) complain and refuse to actually post.

Simply setting a Content-Length does not solve this issue; Firefox does not transmit custom Content-Length headers. The solution is to send an empty string instead of null. This makes Firefox send a Content-Length, and as a result, Squid is happy.

I am attaching patches for both jQuery 1.2.6 and 1.3.1 which fix this issue.

[garrett]

fix for jQuery 1.2.6

[garrett]

fix for jQuery 1.3.1

[dmethvin]

See als dup #4664.

[dmethvin]

Another vote to fix in dup #4667.

[jamon]

This problem also exists with other HTTP methods that have content. In our case, we ran into it with "PROPFIND" (writing a Webdav client in jquery). The latest patch does not resolve this case.

[snover]

Please confirm this is still an issue in the latest version of jQuery and supported versions of Firefox (3+ only). If this issue no longer occurs, you do not need to respond; the ticket will close automatically in 30 days.

[jess.hottenstein@…]

Replying to snover:

Please confirm this is still an issue in the latest version of jQuery and supported versions of Firefox (3+ only). If this issue no longer occurs, you do not need to respond; the ticket will close automatically in 30 days.

This is still a problem in jQuery 1.4.3 with Firefox 3.0+.

[jess.hottenstein@…]

Replying to jess.hottenstein@…:

This is still a problem in jQuery 1.4.3 with Firefox 3.0+.

Correction. This is a problem in jQuery 1.4.x with Firefox 3.0.x. As this only occurs with a squid proxy, I do not know how to duplicate this with fiddler. I have attached the request and response headers to my empty post request.

Response Headers Date Fri, 12 Nov 2010 19:45:30 GMT Server squid/2.6.STABLE21 Content-Type text/html; charset=UTF-8 Content-Length 2054 Expires Fri, 12 Nov 2010 19:45:30 GMT X-Squid-Error ERR_INVALID_REQ 0 X-Cache MISS from fw.example.com X-Cache-Lookup NONE from fw.example.com:3128 Via 1.0 fw.example.com:3128 (squid/2.6.STABLE21) Connection close

Request Headers Host User-Agent Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.19) Gecko/2010031706 Red Hat/3.0.19-1.el5_5 Firefox/3.0.19 Accept text/javascript, application/javascript, */*; q=0.01 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 300 Connection keep-alive X-Requested-With XMLHttpRequest Referer  https:// Cookie Pragma no-cache Cache-Control no-cache

[trac-o-bot]

Automatically closed due to 14 days of inactivity.

[katiegengler]

This is still happening in jQuery 1.5

[jitter]

Replying to katiegengler:

This is still happening in jQuery 1.5

 How to report bugs

[katiegengler]

The same problem exists in jQuery 1.5; the problem was already described sufficiently. It is the combination of Squid, FF3 and jQuery. As this bug was closed invalid by a bot for inactivity, that does not necessarily mean that it should never be fixed.

[anonymous]

Same problem still exists