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doc:appunti:linux:sa:proxy_debug [2011/09/15 15:50]
niccolo created
doc:appunti:linux:sa:proxy_debug [2011/09/15 17:45]
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-====== Substitute HTML or JavaScript ​with a proxy ======+====== Substitute HTML or JavaScript ​on the fly ======
-===== How to test changes ​to live site without touching ​it =====+Using this recipe - while browsing a remote server - you can trick your browser into taking one file (JavaScript,​ HTML, image, ecc.) from a web server controlled by you, instead of from the original server. 
 +This can be useful ​to test some changes ​on production server ​without ​actually ​touching ​the deployed code. 
 +It works by telling the browser to use a proxy for a particular URL, and configure a fake web server to serve that content, eventually canged.
 Create a file **''​proxy.pac''​** and store it into your web server: Create a file **''​proxy.pac''​** and store it into your web server:
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 function FindProxyForURL(url,​ host) { function FindProxyForURL(url,​ host) {
     if (shExpMatch(url,​ "​http://​​8084/​subdir/​page.jsp?​query_string"​)) {     if (shExpMatch(url,​ "​http://​​8084/​subdir/​page.jsp?​query_string"​)) {
-        return "PROXY​8080";+        return "PROXY​8084";
     }     }
 } }
 </​code>​ </​code>​
-Configure ​the fake VirtualHost on your web server:+Configure ​fake ''​VirtualHost'' ​on your web server:
 <​file>​ <​file>​
 +NameVirtualHost *:8084
 +Listen 8084
 +<​VirtualHost *:8084>
 +    ServerName
 +    DocumentRoot /​var/​www/​
 +    ServerAdmin
 +    ErrorLog /​var/​log/​apache2/​​error.log
 +    CustomLog /​var/​log/​apache2/​​access.log combined
 +    # Force .jsp to be served as HTML
 +    AddType text/html .jsp
 +    <​Directory /​var/​www/​>​
 +        AllowOverride All
 +    </​Directory>​
 </​file>​ </​file>​
-The put the fake file into the DocumentRoot ​fo the VirtaulHost **''/​var/​www/​​subdir/​page.jsp''​**.+Then put the fake file into the DocumentRoot ​for the VirtaulHost. In the example above it will be **''/​var/​www/​​subdir/​page.jsp''​**
 +Configure the browser to use automatic proxy configuration,​ and give **''​%%http://​​proxy.pac%%''​** as the URL.
-Configure the browser to use automatic proxy, and give **''​%%''​** as the URL.+**NOTE:** This trick **does not work with Internet Explorer**, because it caches the proxy configuration on a per-server ​basisIf one page from the server was got via proxy, all the subsequent pages will be too.
doc/appunti/linux/sa/proxy_debug.txt · Last modified: 2011/09/15 17:45 by niccolo