From: Stefan Fritsch
where the action can be one of:
+where the action will be treated as:
When redirecting to a local URL, additional environment variables diff --git a/docs/manual/custom-error.xml.es b/docs/manual/custom-error.xml.es index 3c38365e837..927572133f8 100644 --- a/docs/manual/custom-error.xml.es +++ b/docs/manual/custom-error.xml.es @@ -1,7 +1,7 @@ - + + + + + + + +
Apache HTTP Server Version 2.3
+Available Languages: en
+Description: | Rewrite HTML links in to ensure they are addressable +from Clients' networks in a proxy context. |
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Status: | Base |
Module Identifier: | proxy_html_module |
Source File: | mod_proxy_html.c |
Compatibility: | Version 2.4 and later. Available as a third-party module +for earlier 2.x versions |
This module provides an output filter to rewrite HTML links in a proxy situation, to ensure that links work for users outside the proxy. It serves the same purpose as Apache's ProxyPassReverse directive does for HTTP headers, and is an essential component of a reverse proxy.
+ +For example, if a company has an application server at appserver.example.com that is only visible from within the company's internal network, and a public webserver www.example.com
, they may wish to provide a gateway to the application server at http://www.example.com/appserver/
. When the application server links to itself, those links need to be rewritten to work through the gateway. mod_proxy_html serves to rewrite <a href="http://appserver.example.com/foo/bar.html">foobar</a>
to <a href="http://www.example.com/appserver/foo/bar.html">foobar</a>
making it accessible from outside.
mod_proxy_html was originally developed at WebÞing, whose +extensive documentation may be useful to users.
+Description: | Sets the buffer size increment for buffering inline scripts and +stylesheets. |
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Syntax: | ProxyHTMLBufSize bytes |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
In order to parse non-HTML content (stylesheets and scripts), mod_proxy_html +has to read the entire script or stylesheet into a buffer. This buffer will +be expanded as necessary to hold the largest script or stylesheet in a page, +in increments of [nnnn] as set by this directive.
+The default is 8192, and will work well for almost all pages. However, +if you know you're proxying a lot of pages containing stylesheets and/or +scripts bigger than 8K (that is, for a single script or stylesheet, +NOT in total), it will be more efficient to set a larger buffer +size and avoid the need to resize the buffer dynamically during a request. +
+ +Description: | Specify a charset for mod_proxy_html output. |
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Syntax: | ProxyHTMLCharsetOut Charset | * |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
This selects an encoding for mod_proxy_html output. It should not
+normally be used, as any change from the default UTF-8
+(Unicode - as used internally by libxml2) will impose an additional
+processing overhead. The special token ProxyHTMLCharsetOut *
+will generate output using the same encoding as the input.
Note that this relies on mod_xml2enc
being loaded.
Description: | Sets an HTML or XHTML document type declaration. |
---|---|
Syntax: | ProxyHTMLDocType HTML|XHTML [Legacy] |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
In the first form, documents will be declared as HTML 4.01 or XHTML 1.0 +according to the option selected. This option also determines whether +HTML or XHTML syntax is used for output. Note that the format of the +documents coming from the backend server is immaterial: the parser will +deal with it automatically. If the optional second argument is set to +"Legacy", documents will be declared "Transitional", an option that may +be necessary if you are proxying pre-1998 content or working with defective +authoring/publishing tools.
+In the second form, it will insert your own FPI. The optional second +argument determines whether SGML/HTML or XML/XHTML syntax will be used.
+The default is changed to omitting any FPI, +on the grounds that no FPI is better than a bogus one. If your backend +generates decent HTML or XHTML, set it accordingly.
+If the first form is used, mod_proxy_html
+will also clean up the HTML to the specified standard. It cannot
+fix every error, but it will strip out bogus elements and attributes.
+It will also optionally log other errors at LogLevel
Debug.
Description: | Turns the proxy_html filter on or off. |
---|---|
Syntax: | ProxyHTMLEnable On|Off |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +module for earlier 2.x versions. |
A simple switch to enable or disable the proxy_html filter.
+ If mod_xml2enc
is loaded it will also automatically
+ set up internationalisation support.
Note that the proxy_html filter will only act on HTML data + (Content-Type text/html or application/xhtml+xml) and when the + data are proxied. You can override this (at your own risk) by + setting the PROXY_HTML_FORCE environment variable.
+ +Description: | Specify attributes to treat as scripting events. |
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Syntax: | ProxyHTMLEvents attribute [attribute ...] |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
Specifies one or more attributes to treat as scripting events and
+apply ProxyHTMLURLMap
s to where appropriate.
+You can specify any number of attributes in one or more
+ProxyHTMLEvents
directives.
The default configuration defines the events in standard HTML 4 +and XHTML 1.
+ +Description: | Determines whether to fix links in inline scripts, stylesheets, +and scripting events. |
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Syntax: | ProxyHTMLExtended On|Off |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
Set to Off
, HTML links are rewritten according
+ProxyHTMLURLMap
directives, but links appearing
+in Javascript and CSS are ignored.
Set to On
, all scripting events and embedded scripts or
+stylesheets are also processed by the ProxyHTMLURLMap
+rules, according to the flags set for each rule. Since this requires more
+parsing, performance will be best if you only enable it when strictly necessary.
Description: | Fixes for simple HTML errors. |
---|---|
Syntax: | ProxyHTMLFixups [lowercase] [dospath] [reset] |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
This directive takes one to three arguments as follows:
+lowercase
Urls are rewritten to lowercasedospath
Backslashes in URLs are rewritten to forward slashes.reset
Unset any options set at a higher level in the configuration.Take care when using these. The fixes will correct certain authoring +mistakes, but risk also erroneously fixing links that were correct to start with. +Only use them if you know you have a broken backend server.
+ +Description: | Enables per-request interpolation of
+ProxyHTMLURLMap rules. |
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Syntax: | ProxyHTMLInterp On|Off |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
This enables per-request interpolation in
+ ProxyHTMLURLMap
to- and from- patterns.
If interpolation is not enabled, all rules are pre-compiled at startup. + With interpolation, they must be re-compiled for every request, which + implies an extra processing overhead. It should therefore be + enabled only when necessary.
+ +Description: | Specify HTML elements that have URL attributes to be rewritten. |
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Syntax: | ProxyHTMLLinks element attribute [attribute2 ...] |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
Specifies elements that have URL attributes that should be rewritten
+using standard ProxyHTMLURLMap
s. You will need one
+ProxyHTMLLinks directive per element, but it can have any number of attributes.
The default configuration defines the HTML links for standard HTML 4 +and XHTML 1.
+ +Description: | Enables extra verbose logging for debug |
---|---|
Syntax: | ProxyHTMLLogVerbose On|Off |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
If On, mod_proxy_html will log extra diagnostic information (at
+LogLevel
Info)
+including charset detection and processing and
+ProxyHTMLURLMap
matches and rewrites.
+This may be helpful in debugging a configuration.
Description: | Determines whether to strip HTML comments. |
---|---|
Syntax: | ProxyHTMLStripComments On|Off |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +for earlier 2.x versions |
This directive will cause mod_proxy_html to strip HTML comments. +Note that this will also kill off any scripts or styles embedded in +comments (a bogosity introduced in 1995/6 with Netscape 2 for the +benefit of then-older browsers, but still in use today). +It may also interfere with comment-based processors such as SSI or ESI: +be sure to run any of those before mod_proxy_html in the +filter chain if stripping comments!
+ +Description: | Defines a rule to rewrite HTML links |
---|---|
Syntax: | ProxyHTMLURLMap from-pattern to-pattern [flags] [cond] |
Context: | server config, virtual host, directory |
Status: | Base |
Module: | mod_proxy_html |
Compatibility: | Version 2.4 and later; available as a third-party +module for earlier 2.x versions. |
This is the key directive for rewriting HTML links. When parsing a document, +whenever a link target matches from-pattern, the matching +portion will be rewritten to to-pattern, as modified by any +flags supplied.
+ +The optional third argument may define any of the following +Flags. Flags are case-sensitive.
+Ignore HTML links (pass through unchanged)
Ignore scripting events (pass through unchanged)
Pass embedded script and style sections through untouched.
Last-match. If this rule matches, no more rules are applied +(note that this happens automatically for HTML links).
Opposite to L. Overrides the one-change-only default +behaviour with HTML links.
Use Regular Expression matching-and-replace. from-pattern
+is a regexp, and to-pattern
a replacement string that may be
+based on the regexp. Regexp memory is supported: you can use brackets ()
+in the from-pattern
and retrieve the matches with $1 to $9
+in the to-pattern
.
If R is not set, it will use string-literal search-and-replace. +The logic is starts-with in HTML links, but +contains in scripting events and embedded script and style sections. +
+Use POSIX extended Regular Expressions. Only applicable with R.
Case-insensitive matching. Only applicable with R.
Disable regexp memory (for speed). Only applicable with R.
Line-based regexp matching. Only applicable with R.
Match at start only. This applies only to string matching +(not regexps) and is irrelevant to HTML links.
Match at end only. This applies only to string matching +(not regexps) and is irrelevant to HTML links.
Interpolate environment variables in to-pattern
.
+A string of the form ${varname|default}
will be replaced by the
+value of environment variable varname
. If that is unset, it
+is replaced by default
. The |default
is optional.
NOTE: interpolation will only be enabled if
+ProxyHTMLInterp
is On.
Interpolate environment variables in from-pattern
.
+Patterns supported are as above.
NOTE: interpolation will only be enabled if
+ProxyHTMLInterp
is On.
Available Languages: en
+