Yunkai Zhang created TS-2576:
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Summary: Add Oct/Hex escape representation into LogFormat
Key: TS-2576
URL: https://issues.apache.org/jira/browse/TS-2576
Project: Traffic Server
Issue Type: Improvement
Components: Logging
Reporter: Yunkai Zhang
By default, we use white space ' ' as delimiter into LogFormat:
{code}
<LogFormat>
<Name = "Cdn_access_log"/>
<Format = "%<cqhm> %<cquuc> %<pscl> %<psql> %<crc> %<fsi>"/>
</LogFormat>
{code}
Of course, we could use other characters, such as comma(',') or any other
visible character or string.
But we found that, the value of fields may conation the same delimiter
characters, it would case hard to extract from log file.
So I develop a patch, it will introduce Oct/Hex escape sequences representation
in LogFormat, for example:
{code}
<LogFormat>
<Name = "Cdn_access_log"/>
<Format =
"%<cqhm>\001\002%<cquuc>\001\002%<pscl>\001\002%<psql>\001\002%<crc>\001\002%<fsi>"/>
</LogFormat>
{code}
In the above example, '\001\002' are two characters: '\001', '\002' in Oct
escape sequence representation.
This patch now supports two forms(the same with the format in C lauguage):
* Oct escape sequence:
{code}
'\abc': a,b,c should be one of [0-9], and (a*8^2 + b*8 + c) should less then
255.
{code}
* Hex escape sequence:
{code}
'\xab': a,b should one [0-9, a-f, A-F], and (a*16 + b) should less then 255.
{code}
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