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<a href="#enum-members">Enumerations</a> |
<a href="#func-members">Functions</a> </div>
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<div class="title">Wt::Utils Namespace Reference</div> </div>
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<p>Namespace with utility functions.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100">HtmlEncodingFlag</a> { <a class="el" href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100a1bb31216bbc0ec42cdec826acd4521b3">EncodeNewLines</a> = 0x1
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">An enumeration for HTML encoding flags. <a href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a969a7514201547676ad78cef8efc5d62">md5</a> (const std::string &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Computes an MD5 hash. <a href="#a969a7514201547676ad78cef8efc5d62"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#ae6bed2c3fba8d19e7cb6cf62f6b82a9c">sha1</a> (const std::string &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Computes a SHA-1 hash. <a href="#ae6bed2c3fba8d19e7cb6cf62f6b82a9c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a4357400c59a374a67555a11a8610c504">base64Encode</a> (const std::string &data, bool crlf=true)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Base64-encoding of data. <a href="#a4357400c59a374a67555a11a8610c504"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a11988818e1c5a0e77d9ea9c245970df1">base64Decode</a> (const std::string &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Base64-decoding of data. <a href="#a11988818e1c5a0e77d9ea9c245970df1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#ac55faa08ee7785fc131532b579170450">hexEncode</a> (const std::string &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Hex-encoding of data. <a href="#ac55faa08ee7785fc131532b579170450"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a29500f1662db9c36a29e5e7031b8dd74">hexDecode</a> (const std::string &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Hex-decoding of data. <a href="#a29500f1662db9c36a29e5e7031b8dd74"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a3c2f96e6b152bad194c9e2b02e174641">htmlEncode</a> (const std::string &text, WFlags< <a class="el" href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100">HtmlEncodingFlag</a> > flags=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs HTML encoding of text. <a href="#a3c2f96e6b152bad194c9e2b02e174641"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API <a class="el" href="classWt_1_1WString.html">WString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a2e8368d1565c9f4ec4aaf2165346d244">htmlEncode</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &text, WFlags< <a class="el" href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100">HtmlEncodingFlag</a> > flags=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs HTML encoding of text. <a href="#a2e8368d1565c9f4ec4aaf2165346d244"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#ab51bcf8eb00911b097ea117da17e5d57">urlEncode</a> (const std::string &text)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Url encoding (aka percentage encoding). <a href="#ab51bcf8eb00911b097ea117da17e5d57"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#aef2c3f070c53f52f9596535145ecf203">urlDecode</a> (const std::string &text)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Performs Url decoding. <a href="#aef2c3f070c53f52f9596535145ecf203"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API bool </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a6d0a084921aebaf2b0c498d5b1a04f59">removeScript</a> (<a class="el" href="classWt_1_1WString.html">WString</a> &text)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Remove tags/attributes from text that are not passive. <a href="#a6d0a084921aebaf2b0c498d5b1a04f59"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a4b8e353abf99080963e5dee7e4c88a4a">guessImageMimeTypeData</a> (const std::vector< unsigned char > &header)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Guess the image mime type from an image. <a href="#a4b8e353abf99080963e5dee7e4c88a4a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WT_API std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceWt_1_1Utils.html#a134bad34b75368937fc6faa2fa83d008">guessImageMimeType</a> (const std::string &file)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Guess the image mime type from an image. <a href="#a134bad34b75368937fc6faa2fa83d008"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Namespace with utility functions. </p>
<p>This namespace contains functions for computing message digests with cryptographic hash functions (md5, sha1), and functions that implement encoding and decoding for common encodings. </p>
</div><hr/><h2>Enumeration Type Documentation</h2>
<a class="anchor" id="a7b778fbf129e065e259109ec01f8e100"></a><!-- doxytag: member="Wt::Utils::HtmlEncodingFlag" ref="a7b778fbf129e065e259109ec01f8e100" args="" -->
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<td class="memname">enum <a class="el" href="namespaceWt_1_1Utils.html#a7b778fbf129e065e259109ec01f8e100">Wt::Utils::HtmlEncodingFlag</a></td>
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<p>An enumeration for HTML encoding flags. </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="a7b778fbf129e065e259109ec01f8e100a1bb31216bbc0ec42cdec826acd4521b3"></a><!-- doxytag: member="EncodeNewLines" ref="a7b778fbf129e065e259109ec01f8e100a1bb31216bbc0ec42cdec826acd4521b3" args="" -->EncodeNewLines</em> </td><td>
<p>Encode new-lines as line breaks (<br>) </p>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="a11988818e1c5a0e77d9ea9c245970df1"></a><!-- doxytag: member="Wt::Utils::base64Decode" ref="a11988818e1c5a0e77d9ea9c245970df1" args="(const std::string &data)" -->
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<p>Performs Base64-decoding of data. </p>
<p>This utility function implements a Base64 decoding (RFC 2045) of the <code>data</code>. Illegal characters are discarded and skipped.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#a4357400c59a374a67555a11a8610c504" title="Performs Base64-encoding of data.">base64Encode()</a> </dd></dl>
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<p>Performs Base64-encoding of data. </p>
<p>This utility function implements a Base64 encoding (RFC 2045) of the <code>data</code>.</p>
<p>When the crlf argument is true, a CRLF character will be added after each sequence of 76 characters.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#a11988818e1c5a0e77d9ea9c245970df1" title="Performs Base64-decoding of data.">base64Decode()</a> </dd></dl>
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<p>Guess the image mime type from an image. </p>
<p>This function opens the image <code>file</code>, reads the first 25 bytes and calls <a class="el" href="namespaceWt_1_1Utils.html#a4b8e353abf99080963e5dee7e4c88a4a" title="Guess the image mime type from an image.">guessImageMimeTypeData()</a> to infer the mime type. </p>
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<p>Guess the image mime type from an image. </p>
<p>This function examines the header of an image and tries to identify the image type.</p>
<p>At the moment, it recognizes and returns as mime type :</p>
<ul>
<li>image/png</li>
<li>image/jpeg</li>
<li>image/gif</li>
<li>image/bmp</li>
</ul>
<p>The header should contain (at least) the 25 first bytes of the image data.</p>
<p>If no mime-type could be derived, an empty string is returned.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#a4b8e353abf99080963e5dee7e4c88a4a" title="Guess the image mime type from an image.">guessImageMimeTypeData()</a> </dd></dl>
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<a class="anchor" id="a29500f1662db9c36a29e5e7031b8dd74"></a><!-- doxytag: member="Wt::Utils::hexDecode" ref="a29500f1662db9c36a29e5e7031b8dd74" args="(const std::string &data)" -->
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<p>Performs Hex-decoding of data. </p>
<p>Illegal characters are discarded and skipped.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#ac55faa08ee7785fc131532b579170450" title="Performs Hex-encoding of data.">hexEncode()</a> </dd></dl>
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<p>Performs Hex-encoding of data. </p>
<p>A hex-encoding outputs the value of every byte as as two-digit hexadecimal number.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#a29500f1662db9c36a29e5e7031b8dd74" title="Performs Hex-decoding of data.">hexDecode()</a> </dd></dl>
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<a class="anchor" id="a3c2f96e6b152bad194c9e2b02e174641"></a><!-- doxytag: member="Wt::Utils::htmlEncode" ref="a3c2f96e6b152bad194c9e2b02e174641" args="(const std::string &text, WFlags< HtmlEncodingFlag > flags=0)" -->
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<p>Performs HTML encoding of text. </p>
<p>This utility function escapes characters so that the <code>text</code> can be embodied verbatim in a HTML text block. </p>
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<p>Performs HTML encoding of text. </p>
<p>This utility function escapes characters so that the <code>text</code> can be embodied verbatim in a HTML text block.</p>
<p>By default, newlines are ignored. By passing the EncodeNewLines flag, these may be encoded as line breaks (<br>). </p>
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<p>Computes an MD5 hash. </p>
<p>This utility function computes an MD5 hash, and returns the raw (binary) hash value.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#ae6bed2c3fba8d19e7cb6cf62f6b82a9c" title="Computes a SHA-1 hash.">sha1()</a> </dd></dl>
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<p>Remove tags/attributes from text that are not passive. </p>
<p>This removes tags and attributes from XHTML-formatted text that do not simply display something but may trigger scripting, and could have been injected by a malicious user for Cross-Site Scripting (XSS).</p>
<p>This method is used by the library to sanitize XHTML-formatted text set in <a class="el" href="classWt_1_1WText.html" title="A widget that renders (XHTML) text.">WText</a>, but it may also be useful outside the library to sanitize user content when directly using JavaScript.</p>
<p>Modifies the <code>text</code> if needed. When the text is not proper XML, returns <code>false</code>. </p>
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<p>Computes a SHA-1 hash. </p>
<p>This utility function computes a SHA-1 hash, and returns the raw (binary) hash value.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="namespaceWt_1_1Utils.html#a969a7514201547676ad78cef8efc5d62" title="Computes an MD5 hash.">md5()</a> </dd></dl>
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<p>Performs Url decoding. </p>
<p>This utility function percent encodes a <code>text</code> so that it can be embodied verbatim in a URL (e.g. as a fragment).</p>
<dl class="note"><dt><b>Note:</b></dt><dd>To url decode a unicode string, the de-facto standard practice is to interpret the string as a UTF-8 encoded string.</dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#a17afc7c43b5b7a710047be4a2c639575" title="Creates a WString from a UTF8 unicode encoded string.">WString::fromUTF8()</a>, <a class="el" href="namespaceWt_1_1Utils.html#ab51bcf8eb00911b097ea117da17e5d57" title="Performs Url encoding (aka percentage encoding).">urlEncode()</a> </dd></dl>
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<p>Performs Url encoding (aka percentage encoding). </p>
<p>This utility function percent encodes a <code>text</code> so that it can be embodied verbatim in a URL (e.g. as a fragment).</p>
<dl class="note"><dt><b>Note:</b></dt><dd>To url encode a unicode string, the de-facto standard practice is to encode a UTF-8 encoded string.</dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WString.html#a159d088da6e8f2be1035b2341889254c" title="Returns the value as a UTF8 unicode encoded string.">WString::toUTF8()</a>, <a class="el" href="namespaceWt_1_1Utils.html#aef2c3f070c53f52f9596535145ecf203" title="Performs Url decoding.">urlDecode()</a> </dd></dl>
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