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Howto: Language negotiated error documents

Discussion in 'General Discussion' started by thobarn, Apr 2, 2009.

  1. thobarn

    thobarn Well-Known Member

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    I have been looking for a permanent solution to the error document mess on my server. The default CPanel installation comes with the following statement in httpd.conf
    Code:
    Include "/usr/local/apache/conf/includes/errordocument.conf"
    which contains paths to various error documents that are supposed to be in /usr/local/apache/htdocs directory. Unfortunately, except most common five, they are not there.

    In addition, Apache default installation comes with an error directory (/usr/local/apache/error on my server) which contains multi language error documents.

    I spent some time today setting my server to serve those multi language error documents in cases where it was not overridden by a specific host using .htaccess. It took me a while to figure out exactly what to do so I will put it here in case it is any use to someone else, and in the hope that if there is something I overlooked someone will warn me.
    ----------------
    Required:
    Apache 2+ (because of SetOutputFilter, may be adjusted for Apache 1)
    mod_include (comes as default, you can also enclose entire thing in an <IfModule>)

    First remove the
    Code:
    Include "/usr/local/apache/conf/includes/errordocument.conf"
    from httpd.conf, and re-distill with
    Code:
    /usr/local/cpanel/bin/apache_conf_distiller --update
    Alternatively, remove everything from errordocument.conf and save it as a blank document.

    Next, add the following to httpd.conf using Main >> Service Configuration >> Apache Configuration >> Include editor > Pre Main Include
    Code:
    # Apache default installation comes with a directory /error
    # where multi-language error documents are kept.
    
    
    # Define the error document to be served for each error
    # to be those that come with Apache.
    # We put this in server context, so it applies to all
    # hosts defined on this server, unless it is overridden
    # by a specific host.
    ErrorDocument 400 /error/HTTP_BAD_REQUEST.html.var
    ErrorDocument 401 /error/HTTP_UNAUTHORIZED.html.var
    ErrorDocument 403 /error/HTTP_FORBIDDEN.html.var
    ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var
    ErrorDocument 405 /error/HTTP_METHOD_NOT_ALLOWED.html.var
    ErrorDocument 408 /error/HTTP_REQUEST_TIME_OUT.html.var
    ErrorDocument 410 /error/HTTP_GONE.html.var
    ErrorDocument 411 /error/HTTP_LENGTH_REQUIRED.html.var
    ErrorDocument 412 /error/HTTP_PRECONDITION_FAILED.html.var 
    ErrorDocument 413 /error/HTTP_REQUEST_ENTITY_TOO_LARGE.html.var
    ErrorDocument 414 /error/HTTP_REQUEST_URI_TOO_LARGE.html.var
    ErrorDocument 415 /error/HTTP_UNSUPPORTED_MEDIA_TYPE.html.var
    ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var
    ErrorDocument 501 /error/HTTP_NOT_IMPLEMENTED.html.var
    ErrorDocument 502 /error/HTTP_BAD_GATEWAY.html.var
    ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var
    ErrorDocument 506 /error/HTTP_VARIANT_ALSO_VARIES.html.var
    
    # When an error occurs, the host will be looking for a directory
    # called error, give it to them.
    Alias /error /usr/local/apache/error 
    
    <Directory "/usr/local/apache/error">	
    	# Allow acces to this direcory by everyone
    	Order allow,deny
    	Allow from all
    	
    	# We need this for Language negotiation
    	AddHandler type-map .var
    	
    	# We need this as files in error directory
    	# and the directories below are SSI so we set
    	# *everything* in this process as SSI.
    	Options Includes
    	SetOutputFilter INCLUDES	 
    </Directory>
    Finally, delete *.shtml in /usr/local/apache/htdocs (optional)

    Now you can make any customization to top.html and bottom.html in /usr/local/apache/error/include directory.
    The results are like this (minus any customisation I made in /usr/local/apache/error/include)

    English 404
    Korean 404

    Above makes following assumptions:
    • Options Includes was restricted by a higher directory context. If not you can omit that line.
    • Access to /usr/local/apache/error was restricted by a higher directory context. If not, you can omit the lines "Order allow,deny" and "Allow from all".
    • No host will have a directory called error immediately below their document root. Actually, I renamed the /usr/local/apache/error to /usr/local/apache/402FFD9DBBD079 as it is unlikely that anyone will have such a directory. Obviously, one must replace all occurrences of error in above description with 402FFD9DBBD079.
    • You make a backup of any original file before making changes so if something goes wrong... :)
     
    Infopro likes this.
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