[Resolved] Chunked HTTP/1.1 POST request support

[ritchey]

I've noticed that LSWS doesn't support Chunked HTTP/1.1 POST requests. Such behavior seems to be HTTP/1.1 incompatible. HTTP/1.1 RFC (see RFC 2616, section 3.6.1) states clearly:

"All HTTP/1.1 applications MUST be able to receive and decode the "chunked" transfer-coding, (...)"

Today, major part of mobile devices sends CHUNKED HTTP requests, when posting large data (above 5 KB). For example Apache server handles such requests perfectly.

Any explanation to this behaviour ?

[mistwang]

Chunked POST request should be supported. Can you provide a simple example request including request header and chunked body, please send it to bug@litepseed... We will fix it if it is a bug or a situation not handled properly.

[ritchey]

Sample chunked POST request:

POST /test.php HTTP/1.1
User-Agent: Profile/MIDP-2.0 Configuration/CLDC-1.1
Host: 127.0.0.1
Transfer-Encoding: chunked

6
Hello_
5
World
0

// after last '0' there are two times CRLF, so the last 5 bytes are: 0x30, 0x0D, 0x0A, 0x0D, 0x0A
Above request is attached as text file to this post.

And here is the test.php:

PHP Code:

<?php
    $in = fopen('php://input', 'r');
    $text = fread($in, 100);
    $size = strlen($text);
    echo "Text: $text<br/>";
    echo "Size: $size<br/>";    
?>

On Apache 2.2.11 it gives following response:

HTTP/1.1 200 OK
Date: Sun, 27 Jun 2010 22:04:27 GMT
Server: Apache/2.2.11 (Win32) PHP/5.3.0
X-Powered-By: PHP/5.3.0
Content-Length: 38
Content-Type: text/html

Text: Hello_World<br/>Size: 11<br/>

I also tested this POST request on Tomcat and Jetty - works perfectly - we recive request with its content.
(When testing it on Apache or other servers - remember not to use any proxies like Squid, cause they usually also don't support chunked POSTs).

Unfortunetly, on LSWS the PHP $text variable leaves empty:

HTTP/1.1 200 OK
Date: Sun, 27 Jun 2010 22:02:54 GMT
Server: LiteSpeed
Connection: close
X-Powered-By: PHP/5.2.8
Content-Type: text/html
Content-Length: 26

Text: <br/>Size: 0<br/>

No data is read from "php://input". The strange thing is LSWS doesn't abort request at the begining by returing some 4xx or 5xx error - not at all. LSWS accepts the request, passes it to PHP file but drops posted content. The retured code is HTTP 200.
All seems to be perfect but we cannot access chunked request body from PHP file.

Such requests as above are produced by major part of today mobile devices when POST-ing large data (above 5 KB). So now, using LSWS server we cannot upload files to server from large number of mobile phones.


I will also post this info to bug@litespeed... as You suggested.

Best Regards,
Mateusz Maksymiuk

[mistwang]

Thanks for the detail test case, we successfully identify the bug and fixed it. It was the length of request body not being passed to PHP properly.
Fix is in our 4.0.16 build, just change the version number in the download link to get it.

[ritchey]

Mistwang - Thank You very much for Your reply. You have incredibly fast reaction time - in less than one day - You have released fixed version.
It's the highest possible Quality of Service.

Best Regards,
Mateusz Maksymiuk