INCLUDE{"page"} -- include other topic, attachment, or web page

• Merges the content of a specified page into the current one before rendering.
• Syntax: %INCLUDE{"page" ...}%
• Supported parameters:

  Parameter:	Description:	Default:
  "SomeTopic"	The name of a topic located in the current web, i.e. %INCLUDE{"WebNotify"}%
  "Web.Topic"	A topic in another web, i.e. %INCLUDE{"TWiki.SiteMap"}%
  "http://..."	A full qualified URL, i.e. %INCLUDE{"http://twiki.org:80/index.html"}%. Supported content types are text/html and text/plain by default. See allowanytype. if the URL resolves to an attachment file on the server this will automatically translate to a server-side include.
  attachment="filename.ext"	Include the specified attachment instead of topic text. The attachment content is subject to processing just like when topic text is included. For example, text up to %STARTINCLUDE% is excluded. When including an attachment, you can do without topic specification - %INCLUDE{attachment="filename.ext"}% works, which results in including the attachment of the same topic.
  allowanytype="on"	Suppress the content type checking in including the web page specified by a URL.	disabled
  charset="CHARSET"	Specify the charset of the included content so that a proper charset conversion happens when it's different from the site charset. Needless to say, this works for a TWiki topic, a topic attachment, and a content specified with a URL. This parameter overrides otherwise specified or implied charset.	none
  pattern="..."	Include a subset of a topic or a web page. Specify a RegularExpression that scans from start ('^') to end and contains the text you want to keep in parenthesis, e.g., pattern="^.*?(from here.*?to here).*". IncludeTopicsAndWebPages has more.	none
  headingoffset="2"	Adjust the level of headings in the included topic. A "2" or "+2" increases the level by two, e.g. a ---+ H1 turns into a ---+++ H3. Positive and negative values are supported. Adjusted min and max levels are H1 and H6, respectively.	no adjustment
  hidetoc="on"	Remove %TOC% in included content. Useful to show table of contents in individual topics, while suppressing them if included in a big master document.	TOC_HIDE_IF_ INCLUDED setting
  rev="2"	Include a previous topic revision; N/A for URLs	top revision
  raw="on" (for HTTP inclusion)	When a page is included via HTTP, normally TWiki will process it, doing the following: 1) Alter relative links to point back to originating host, 2) Remove some basic HTML tags (html, head, body, script) and finally 3) Remove newlines from HTML tags spanning multiple lines. If you prefer to include exactly what is in the source of the originating page set this to on. raw="on" is short for disableremoveheaders="on", disableremovescript="on", disableremovebody="on", disablecompresstags="on" and disablerewriteurls="on".	disabled
  raw="on" (for topic or attachment inclusion)	When a topic is included, normally TWiki variables in the included topic are expanded in the context of the inlcluded topic. If raw="on" is specified, that variable expansion does not happen. You may wonder what's that for and what are the implications, which are found out on IncludeTopicRaw. Because of the "in the raw" nature of the parapmeter, if it's specified, parameters such as encode, headingoffset, hidetoc, newline, nofinalnewline, and section are ignored.	disabled
  literal="on"	While using the raw option will indeed include the raw content, the included content will still be processed and rendered like regular topic content. To disable parsing of the included content, set the literal option to "on".	disabled
  nofinalnewline="on"	Delete the new line at the end of the result if exists	disabled
  newline="$br"	Convert newlines in textarea to other delimiters. Variable $br expands to <br /> tag, and $n to a newline. Other text is encoded based on encode parameter.	no conversion
  encode="html"	Encode special characters into HTML entities. If a FORMFIELD is passed into an HTML form field it should be encoded as "html". Additional encodings available: encode="quote", encode="moderate", encode="safe", encode="entity" and encode="url". See ENCODE for details.	no encoding
  disableremoveheaders="on"	Bypass stripping headers from included HTML (everything until first </head> tag)	disabled
  disableremovescript="on"	Bypass stripping all <script> tags from included HTML	disabled
  disableremovebody="on"	Bypass stripping the </body> tag and everything around over and below it	disabled
  disablecompresstags="on"	Bypass replacing newlines in HTML tags with spaces. This compression step rewrites unmatched <'s into &lt; entities unless bypassed	disabled
  disablerewriteurls="on"	Bypass rewriting relative URLs into absolute ones	disabled
  disablefixlinks="on"	Bypass fixing WikiWord links if include is done across webs. Fixing links in included text such as from SomeLink to Otherweb.SomeLink is usually desirable so that links in included text still point to the same target	disabled
  warn="off"	Warn if topic include fails: Fail silently (if off); output default warning (if set to on); else, output specific text (use $topic for topic name)	%INCLUDEWARNING% preferences setting
  section="name"	Includes only the specified named section, as defined in the included topic by the STARTSECTION and ENDSECTION variables. Nothing is shown if the named section does not exists. section="" is equivalent to not specifying a section
  PARAMONE="val 1" PARAMTWO="val 2"	Any other parameter will be defined as a variable within the scope of the included topic. The example parameters on the left will result in %PARAMONE% and %PARAMTWO% being defined within the included topic. A default value for a variable can be specified in the included topic in case the corresponding parameter is not specified, such as %PARAMONE{ default="..." }%

• Security Considerations:
  • The ability to INCLUDE arbitrary URLs, such as %INCLUDE{"http://www.google.com/"}% is turned off by default. To turn this on, ask your TWiki administrator to enable the {INCLUDE}{AllowURLs} flag in the Security setup section of configure.
  • JavaScript in included web pages is filtered out as a security precaution per default. Disable filtering with raw or disableremovescript parameter.
• Infinite INCLUDE loop prevention:
  • To prevent obvious infinite INCLUDE loop, %INCLUDE{"http://THIS_SERVER/.../THIS_WEB/THIS_TOPIC}% is detected and blocked.
  • If the server has aliases, $TWiki::cfg{UrlHostRegex} should be set so that it matches all possible server names. e.g.

    $TWiki::cfg{UrlHostRegex} = qr{http://(www\.)?domain\.com};
    

• INCLUDE attachment:
  As described above, there are two ways to include an attachment. They are similar, but behave slightly differently.
  • attachment="filename.ext"
    This works in the same manner as ordinary topic text inclusion. %STARTINCLUDE% and %STOPINCLUDE% in the attachment are observed. The section parameter is observed. The variables are expanded in the context of the topic having the attachment. For example, %TOPIC% is expanded to the name of the topic having the attachment.
  • Specifying the URL of an attachment. (e.g. %INCLUDE{%ATTACHURL%/foo.txt}%)
    The attachment content is processed in the same manner as when data is retrieved from another web server. Unless raw="on" is specified, the content of <body>...</body> is extracted, all occurrences of <script>...</script> are removed. Topic context change doesn't happen because in general inclusion via HTTP doesn't cause topic context change.
• Examples: See IncludeTopicsAndWebPages
• Category: ApplicationsAndComponentsVariables, DevelopmentVariables, ImportVariables
• Related: BASETOPIC, BASEWEB, INCLUDINGTOPIC, INCLUDINGWEB, STARTINCLUDE, STOPINCLUDE, STARTSECTION, ENDSECTION, TOC, IncludeTopicsAndWebPages, ParameterizedVariables