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Re: [Proto-Scripty] Re: Ajax.Request fails, while vanilla XHR works fine Walter Lee Davis Fri Apr 13 06:00:28 2012

Thanks very much for the added detail. I filed an issue on the Github project 
for the Python server, and within hours another Githubber had posted a pull 
request fixing the bug. The server was just not aware of what to do if it got 
such an OPTIONS request, so it was falling over.

Walter

On Apr 13, 2012, at 5:26 AM, Victor wrote:

> It seems to be an issue on their server (BaseHTTP/0.3 Python/2.7.1+ according 
> to FireBug). I'll file a bug and see what happens.
> 
> XHR without setRequestHeader sends usual 'GET' request:
> 
> Request URL: http://zip.elevenbasetwo.com/?zip=a
> Request Method: GET
> Status Code: 404 Not Found
> Request Headers
> Accept: */*
> Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.3
> Accept-Encoding: gzip,deflate,sdch
> Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4
> Connection: keep-alive
> Host: zip.elevenbasetwo.com
> Origin: https://groups.google.com
> User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.19 (KHTML, like 
> Gecko) Chrome/18.0.1025.142 Safari/535.19
> Response Headers
> Access-Control-Allow-Origin: *
> Connection: close
> Content-Type: text/plain
> Date: Fri, 13 Apr 2012 09:16:07 GMT
> Server: BaseHTTP/0.3 Python/2.7.1+
> 
> XHR with any setRequestHeader sends first 'OPTIONS' request (so-called 
> preflight):
> 
> Request URL: http://zip.elevenbasetwo.com/?zip=a
> Request Method: OPTIONS
> Status Code: 501 Not Implemented
> Request Headers
> Accept: */*
> Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.3
> Accept-Encoding: gzip,deflate,sdch
> Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4
> Access-Control-Request-Headers: x-xxx, origin
> Access-Control-Request-Method: GET
> Connection: keep-alive
> Host: zip.elevenbasetwo.com
> Origin: https://groups.google.com
> User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.19 (KHTML, like 
> Gecko) Chrome/18.0.1025.142 Safari/535.19
> Response Headers
> Connection: close
> Content-Type: text/html
> Date: Fri, 13 Apr 2012 09:20:32 GMT
> Server: BaseHTTP/0.3 Python/2.7.1+
> 
> It seems that some browsers (like Firefox and WebKit-based) may send CORS 
> requests without preflight for text/plain resources when no additional 
> headers are set. In other cases they send preflighted 'OPTIONS' request, 
> which is not implemented in this 'BaseHTTP/0.3 Python/2.7.1+' server.
> 
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