Is it possible to log all HTTP request headers with Apache

Question

How to make a record into the logfile the contents of the HTTP request header  all  as received by apache   Currently my apache combined log format configuration is   LogFormat   h  l  u  t    r     gt s  b     Referer i       User-Agent i       Cookie i    combined  I understand that it is possible to do it so   LogFormat   h  l  u  t    r     gt s  b     Referer i       User-Agent i       Cookie i       heading name i       heading name i       heading name i    combined  but it is not logical and it is not possible to know which headers will be

User · Answer

Here is a list of all http-headers  http   en wikipedia org wiki List of HTTP header fields  And here is a list of all apache-logformats  http   httpd apache org docs 2 0 mod mod log config html formats  As you did write correctly  the code for logging a specific header is   foobar i where foobar is the name of the header  So  the only solution is to create a specific format string  When you expect a non-standard header like x-my-nonstandard-header  then use   x-my-nonstandard-header i  If your server is going to ignore this non-standard-header  why should you want to write it to your logfile  An unknown header has absolutely no effect to your system

User · Answer

If you re interested in seeing which specific headers a remote client is sending to your server  and you can cause the request to run a CGI script  then the simplest solution is to have your server script dump the environment variables into a file somewhere   e g   run the shell command  env    tmp headers  from within your script  Then  look for the environment variables that start with HTTP        You will see lines like   HTTP ACCEPT text html application xhtml xml application xml q 0 9     q 0 8 HTTP ACCEPT ENCODING gzip  deflate HTTP ACCEPT LANGUAGE en-US en q 0 5 HTTP CACHE CONTROL max-age 0   Each of those represents a request header   Note that the header names are modified from the actual request  For example   Accept-Language  becomes  HTTP ACCEPT LANGUAGE   and so on

User · Answer

mod log forensic is what you want  but it may not be included available with your Apache install by default   Here is how to use it   LoadModule log forensic module  usr lib64 httpd modules mod log forensic so   lt IfModule log forensic module gt   ForensicLog  var log httpd forensic log   lt  IfModule gt

User · Answer

In my case easiest way to get browser headers was to use php  It appends headers to file and prints them to test page     lt  php  fp   fopen  m  temp requests txt    a     time     SERVER  REQUEST TIME    fwrite  fp   time    n    echo   time  lt br gt    foreach  getallheaders   as  name   gt   value         cur hd     name   value n       fwrite  fp   cur hd       echo   cur hd  lt br gt      fwrite  fp       n    fclose  fp     gt

[apache] Is it possible to log all HTTP request headers with Apache?

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