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| META TOPICPARENT |
name="TWikiVariables" |
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< < | ENCODE{"string"} -- encodes a string to HTML entities
- Encode "special" characters to HTML numeric entities. Encoded characters are:
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> > | ENCODE{string} -- encode a string to URL or HTML entities
- Encode "special" characters to HTML numeric entities or to URL entities.
- Encoded characters:
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- all non-printable ASCII characters below space, except newline (
"\n") and linefeed ("\r")
- HTML special characters
"<", ">", "&", single quote (') and double quote (")
- TWiki special characters
"%", "[", "]", "@", "_", "*", "=" and "|"
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type="moderate" |
Encode special characters into HTML entities for moderate cross-site scripting protection: "<", ">", single quote (') and double quote (") are encoded. Useful to allow TWiki variables in comment boxes. |
type="url" |
type="safe" |
Encode special characters into HTML entities for cross-site scripting protection: "<", ">", "%", single quote (') and double quote (") are encoded. |
type="url" |
type="entity" |
Encode special characters into HTML entities, like a double quote into ". Does not encode newline (\n) or linefeed (\r). |
type="url" |
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< < |
type="html" |
Encode special characters into HTML entities. In addition to type="entity", it also encodes space, \n and \r. Useful to encode text properly in HTML input fields. |
type="url" |
- Example:
%ENCODE{"spaced name"}% expands to spaced%20name
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Notes:
- Values of HTML input fields should encoded as
"html". Example: <input type="text" name="address" value="%ENCODE{ "any text" type="html" }%" />
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> > |
type="entity" extra=" $n$r" |
For type="entity" only, use the extra parameter to encode additional characters to HTML numeric entities. Formatting tokens can be used, such as "$n" for newline. Note that type="entity" extra=" $n$r" is equivalent to type="html". |
type="url" extra="" |
type="html" |
Encode special characters into HTML entities. In addition to type="entity", it also encodes space, \n and \r. Useful to encode text properly in HTML input fields. See equivalent ENTITY. |
type="url" |
- Examples:
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%ENCODE{"spaced name"}% expands to spaced%20name
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%ENCODE{"spaced name" type="entity" extra=" "}% expands to spaced name
- Notes:
- Values of HTML input fields should be encoded as
"html". A shorter %ENTITY{any text}% can be used instead of the more verbose %ENCODE{ "any text" type="html" }%. Example: <input type="text" name="address" value="%ENTITY{any text}%" />
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- Double quotes in strings must be escaped when passed into other TWiki variables.
Example: %SEARCH{ "%ENCODE{ "string with "quotes"" type="quotes" }%" noheader="on" }%
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< < |
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- Use
type="moderate", type="safe" or type="entity" to protect user input from URL parameters and external sources against cross-site scripting (XSS). type="entity" is the safest mode, but some TWiki applications might not work. type="safe" provides a safe middle ground, type="moderate" provides only moderate cross-site scripting protection.
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