TSIOBufferBlockReadStart() could'nt return the corresponding chunk data length
when original server using the "Transfer Encoding: chunked" http header !
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Key: TS-921
URL: https://issues.apache.org/jira/browse/TS-921
Project: Traffic Server
Issue Type: Bug
Components: TS API
Affects Versions: 3.0.1
Environment: OS: Ubuntu 10.10 32bit, Traffic Server version:.3.0.1,
Web Browser：firefox 6.0，CPU: Intel core i3-2100 3.10GHz, Memory: 2G, HardDisk:
500G
Reporter: taoyunxing
Fix For: 3.0.2
Recently I meet with a strange proble when I manage to get the server response
body in the "Transfer Encoding: chunked" mode:
I couldn't get the corresponding chunk length in hexdecimal ! The details as
follows:
I use the "null-transform" plugin modified to just output the server response
body, when the web server uses the "Transfer Encoding: chunked" header
to transfer chunked data to user agent, eg, I request the web page:
"http://www.qq.com/";, I just get the chunk body data, but get no chunk length
in
the hexdecimal format "383cb\r\n" before the chunk body data. the chunk body
data is uncompressed and like as "<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>\r\n......."
In addition, I capture the data packet using the Wireshark software, I sure
that I see the chunk length "383cb\r\n" before the chunk body data "<!DOCTYPE
html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>\r\n.......", it is a
complete chunk response !
I continue to check the code of null-transform.c, set a breakpoint at the
function TSIOBufferBlockReadStart(), run ATS and debug it, when ATS stop at the
breakpoint TSIOBufferBlockReadStart(), I print the return string of
TSIOBufferBlockReadStart(), there is no chunk data length at the head of output
string, which implies the api TSIOBufferBlockReadStart() has bug！
Breakpoint 1, TSIOBufferBlockReadStart (blockp=0x89d6570, readerp=0x89d5330,
avail=0xb6c8e288) at InkIOCoreAPI.cc:659
659 {
(gdb) s
660 sdk_assert(sdk_sanity_check_iocore_structure(blockp) == TS_SUCCESS);
(gdb) n
667 p = blk->start();
(gdb)
668 if (avail)
(gdb) p p
$3 = 0xb1312000 "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0
Transitional//EN\"
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\";>\r\n<html
xmlns=\"http://www.w3.org/1999/xhtml\";>\r\n<head>\r\n<meta
http-equiv=\"Conten"...
(gdb)
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