Rewriting redirect 302 headers using Apache2 module? — OZONE Asylum, home of the Mad Scientists

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Maskkkk Paranoid (IV) Inmate From: Johnstown, PA Insane since: Mar 2002	posted 02-22-2010 17:02 I am currently attempting to use my.domain.com as a proxy through which users of my site access a business partners site: http://domain.to_proxy_through_my_domain.com/ below is the configuration I have so far: code: #Load Files needed for proxy_html_module #Proxy Support LoadModule proxy_module modules/mod_proxy.so #HTTP Support LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule headers_module modules/mod_headers.so LoadModule deflate_module modules/mod_deflate.so #LoadFile "C://www/gra/mod_proxy_html/zlib1.dll" #LoadFile "C://www/gra/mod_proxy_html/iconv.dll" # for proxy_html_module LoadFile "C://www/gra/mod_proxy_html/libxml2.dll" # rewrites HMTL URLs for proxied pages LoadModule proxy_html_module modules/mod_proxy_html.so # Turn off forward proxying ProxyRequests Off <Proxy > Order deny,allow Allow from all </Proxy> # Forward /my-gateway to http://domain.to_proxy_through_my_domain.com/ ProxyPass /my-gateway/ http://domain.to_proxy_through_my_domain.com/ <Location /my-gateway/> # ReWrite response headers ProxyPassReverse / # Enable link rewriting SetOutputFilter proxy-html # Apparently compression causes problems in mod_proxy_html RequestHeader unset Accept-Encoding ProxyHTMLExtended On ProxyHTMLURLMap . http://my.domain.com/my-gateway/$1 Rihe ProxyHTMLLinks form action </Location> Thus far it works until the point at which the user logs in to my business partners domain (http://domain.to_proxy_through_my_domain.com) I used fiddler to track what happens during the request where the user logs in: the browser makes the request to login: Request: code: POST /my-gateway/default.asp?do=login HTTP/1.1 Accept: image/gif, image/jpeg, image/pjpeg, application/x-ms-application, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, / Referer: http://my.domain.com/my-gateway/ Accept-Language: en-us User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729) Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Host: my.domain.com Content-Length: 47 Connection: Keep-Alive Pragma: no-cache Cookie: sessionguid=%7B0DC785C5%2DE137%2D4514%2D826E%2D959A9D831E19%7D; ASPSESSIONIDASQQBQSA=NEMKJJBCMHMAENLDDOGKBNDN username=test&password=testpassword&Submit=Log+In The response that the user gets back redirects them directly to my business partners website, instead of through the proxy that I've setup on my domain: Response: code: HTTP/1.1 302 Object moved Date: Mon, 22 Feb 2010 14:02:02 GMT Server: Microsoft-IIS/5.0 Location: http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products Content-Type: text/html;charset=utf-8 Cache-control: private Set-Cookie: sessionguid=%7B02F9DB52%2D1907%2D48DF%2DBE08%2DE61777D6B192%7D; expires=Tue, 22-Feb-2011 06:00:00 GMT; path=/ Content-Length: 235 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive <html><head><title>Object moved</title></head><body><h1>Object Moved</h1>This object may be found <a href="http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products">here</a>.</body></html> How do I rewrite the headers so that the "Location: " header above reads code: "http://my.domain.com/my-gateway/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products" instead of code: "http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products" Thank you, maskkkk
mr.maX Maniac (V) Mad Scientist From: Belgrade, Serbia Insane since: Sep 2000	posted 02-23-2010 18:56 ProxyPassReverse directive is used to instruct Apache to adjust Location, Content-Location and URI headers in HTTP responses. Looking at your configuration, I think that you've specified this directive in a wrong way. Example code from Apache documentation looks like this: ProxyPass /mirror/foo/ http://backend.example.com/ ProxyPassReverse /mirror/foo/ http://backend.example.com/ ProxyPassReverseCookieDomain backend.example.com public.example.com ProxyPassReverseCookiePath / /mirror/foo/ Read more about ProxyPass* directives and their usage at: http://httpd.apache.org/docs/2.2/mod/mod_proxy.html Also note that Apache will only overwrite addresses in HTTP headers, if returned page contains hard coded links to proxied domain, they will by-pass your proxy, too. In order to rewrite those links you need to use third party module (as mentioned in Apache documentation above).

I am currently attempting to use my.domain.com as a proxy through which
users of my site access a business partners site: http://domain.to_proxy_through_my_domain.com/

below is the configuration I have so far:

code:

#Load Files needed for proxy_html_module


#Proxy Support
LoadModule  proxy_module         modules/mod_proxy.so

#HTTP Support
LoadModule  proxy_http_module    modules/mod_proxy_http.so
LoadModule  headers_module       modules/mod_headers.so
LoadModule  deflate_module       modules/mod_deflate.so
#LoadFile "C://www/gra/mod_proxy_html/zlib1.dll"
#LoadFile "C://www/gra/mod_proxy_html/iconv.dll"

# for proxy_html_module
LoadFile "C://www/gra/mod_proxy_html/libxml2.dll"
# rewrites HMTL URLs for proxied pages
LoadModule proxy_html_module     modules/mod_proxy_html.so

# Turn off forward proxying
ProxyRequests Off

<Proxy *>
  Order deny,allow
  Allow from all
</Proxy>

# Forward /my-gateway to http://domain.to_proxy_through_my_domain.com/
ProxyPass /my-gateway/ http://domain.to_proxy_through_my_domain.com/

<Location /my-gateway/>
  # ReWrite response headers
  ProxyPassReverse /
  # Enable link rewriting
  SetOutputFilter proxy-html
  # Apparently compression causes problems in mod_proxy_html
  RequestHeader unset Accept-Encoding
  
  ProxyHTMLExtended On
  ProxyHTMLURLMap .* http://my.domain.com/my-gateway/$1 Rihe
  
  ProxyHTMLLinks	form		action
</Location>

Thus far it works until the point at which the user logs in to my business partners domain (http://domain.to_proxy_through_my_domain.com)

I used fiddler to track what happens during the request where the user logs in:

the browser makes the request to login:

Request:

code:

POST /my-gateway/default.asp?do=login HTTP/1.1
Accept: image/gif, image/jpeg, image/pjpeg, application/x-ms-application, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*

Referer: http://my.domain.com/my-gateway/
Accept-Language: en-us
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729)
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Host: my.domain.com
Content-Length: 47
Connection: Keep-Alive
Pragma: no-cache
Cookie: sessionguid=%7B0DC785C5%2DE137%2D4514%2D826E%2D959A9D831E19%7D; ASPSESSIONIDASQQBQSA=NEMKJJBCMHMAENLDDOGKBNDN

username=test&password=testpassword&Submit=Log+In

The response that the user gets back redirects them directly to my business partners website, instead of through the proxy that I've setup on my domain:

Response:

code:

HTTP/1.1 302 Object moved
Date: Mon, 22 Feb 2010 14:02:02 GMT
Server: Microsoft-IIS/5.0
Location: http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products
Content-Type: text/html;charset=utf-8
Cache-control: private
Set-Cookie: sessionguid=%7B02F9DB52%2D1907%2D48DF%2DBE08%2DE61777D6B192%7D; expires=Tue, 22-Feb-2011 06:00:00 GMT; path=/
Content-Length: 235
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive

<html><head><title>Object moved</title></head><body><h1>Object Moved</h1>This object may be found <a href="http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&amp;do=products">here</a>.</body></html>

How do I rewrite the headers so that the "Location: " header above reads

code:

"http://my.domain.com/my-gateway/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products"

instead of

code:

"http://domain.to_proxy_through_my_domain.com/default.asp?SessionGUID={02F9DB52-1907-48DF-BE08-E61777D6B192}&do=products"

Thank you,
maskkkk

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