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222 lines
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/network/qhttp.cpp:331 -->
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<title>QHttpHeader Class</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QHttpHeader Class Reference<br><small>[<a href="network.html">network module</a>]</small></h1>
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<p>The QHttpHeader class contains header information for HTTP.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qhttp-h.html">qhttp.h</a>></tt>
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<p>Inherited by <a href="qhttpresponseheader.html">QHttpResponseHeader</a> and <a href="qhttprequestheader.html">QHttpRequestHeader</a>.
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<p><a href="qhttpheader-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#QHttpHeader"><b>QHttpHeader</b></a> ()</li>
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<li class=fn><a href="#QHttpHeader-2"><b>QHttpHeader</b></a> ( const QHttpHeader & header )</li>
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<li class=fn><a href="#QHttpHeader-3"><b>QHttpHeader</b></a> ( const QString & str )</li>
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<li class=fn>virtual <a href="#~QHttpHeader"><b>~QHttpHeader</b></a> ()</li>
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<li class=fn>QHttpHeader & <a href="#operator-eq"><b>operator=</b></a> ( const QHttpHeader & h )</li>
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<li class=fn>QString <a href="#value"><b>value</b></a> ( const QString & key ) const</li>
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<li class=fn>void <a href="#setValue"><b>setValue</b></a> ( const QString & key, const QString & value )</li>
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<li class=fn>void <a href="#removeValue"><b>removeValue</b></a> ( const QString & key )</li>
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<li class=fn>QStringList <a href="#keys"><b>keys</b></a> () const</li>
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<li class=fn>bool <a href="#hasKey"><b>hasKey</b></a> ( const QString & key ) const</li>
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<li class=fn>bool <a href="#hasContentLength"><b>hasContentLength</b></a> () const</li>
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<li class=fn>uint <a href="#contentLength"><b>contentLength</b></a> () const</li>
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<li class=fn>void <a href="#setContentLength"><b>setContentLength</b></a> ( int len )</li>
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<li class=fn>bool <a href="#hasContentType"><b>hasContentType</b></a> () const</li>
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<li class=fn>QString <a href="#contentType"><b>contentType</b></a> () const</li>
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<li class=fn>void <a href="#setContentType"><b>setContentType</b></a> ( const QString & type )</li>
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<li class=fn>virtual QString <a href="#toString"><b>toString</b></a> () const</li>
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<li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li>
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<li class=fn>virtual int <a href="#majorVersion"><b>majorVersion</b></a> () const = 0</li>
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<li class=fn>virtual int <a href="#minorVersion"><b>minorVersion</b></a> () const = 0</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QHttpHeader class contains header information for HTTP.
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<p>
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<p> In most cases you should use the more specialized derivatives of
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this class, <a href="qhttpresponseheader.html">QHttpResponseHeader</a> and <a href="qhttprequestheader.html">QHttpRequestHeader</a>, rather
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than directly using QHttpHeader.
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<p> QHttpHeader provides the HTTP header fields. A HTTP header field
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consists of a name followed by a colon, a single space, and the
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field value. (See RFC 1945.) Field names are case-insensitive. A
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typical header field looks like this:
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<pre>
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content-type: text/html
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</pre>
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<p> In the API the header field name is called the "key" and the
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content is called the "value". You can get and set a header
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field's value by using its key with <a href="#value">value</a>() and <a href="#setValue">setValue</a>(), e.g.
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<pre>
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header.setValue( "content-type", "text/html" );
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<a href="qstring.html">QString</a> contentType = header.value( "content-type" );
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</pre>
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<p> Some fields are so common that getters and setters are provided
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for them as a convenient alternative to using <a href="#value">value</a>() and
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<a href="#setValue">setValue</a>(), e.g. <a href="#contentLength">contentLength</a>() and <a href="#contentType">contentType</a>(),
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<a href="#setContentLength">setContentLength</a>() and <a href="#setContentType">setContentType</a>().
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<p> Each header key has a <em>single</em> value associated with it. If you
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set the value for a key which already exists the previous value
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will be discarded.
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<p> <p>See also <a href="qhttprequestheader.html">QHttpRequestHeader</a>, <a href="qhttpresponseheader.html">QHttpResponseHeader</a>, and <a href="io.html">Input/Output and Networking</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QHttpHeader"></a>QHttpHeader::QHttpHeader ()
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</h3>
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Constructs an empty HTTP header.
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<h3 class=fn><a name="QHttpHeader-2"></a>QHttpHeader::QHttpHeader ( const <a href="qhttpheader.html">QHttpHeader</a> & header )
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</h3>
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Constructs a copy of <em>header</em>.
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<h3 class=fn><a name="QHttpHeader-3"></a>QHttpHeader::QHttpHeader ( const <a href="qstring.html">QString</a> & str )
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</h3>
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Constructs a HTTP header for <em>str</em>.
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<p> This constructor parses the string <em>str</em> for header fields and
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adds this information. The <em>str</em> should consist of one or more
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"\r\n" delimited lines; each of these lines should have the format
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key, colon, space, value.
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<h3 class=fn><a name="~QHttpHeader"></a>QHttpHeader::~QHttpHeader ()<tt> [virtual]</tt>
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</h3>
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Destructor.
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<h3 class=fn>uint <a name="contentLength"></a>QHttpHeader::contentLength () const
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</h3>
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Returns the value of the special HTTP header field <tt>content-length</tt>.
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<p> <p>See also <a href="#setContentLength">setContentLength</a>() and <a href="#hasContentLength">hasContentLength</a>().
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<h3 class=fn><a href="qstring.html">QString</a> <a name="contentType"></a>QHttpHeader::contentType () const
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</h3>
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Returns the value of the special HTTP header field <tt>content-type</tt>.
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<p> <p>See also <a href="#setContentType">setContentType</a>() and <a href="#hasContentType">hasContentType</a>().
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<h3 class=fn>bool <a name="hasContentLength"></a>QHttpHeader::hasContentLength () const
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</h3>
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Returns TRUE if the header has an entry for the special HTTP
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header field <tt>content-length</tt>; otherwise returns FALSE.
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<p> <p>See also <a href="#contentLength">contentLength</a>() and <a href="#setContentLength">setContentLength</a>().
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<h3 class=fn>bool <a name="hasContentType"></a>QHttpHeader::hasContentType () const
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</h3>
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Returns TRUE if the header has an entry for the the special HTTP
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header field <tt>content-type</tt>; otherwise returns FALSE.
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<p> <p>See also <a href="#contentType">contentType</a>() and <a href="#setContentType">setContentType</a>().
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<h3 class=fn>bool <a name="hasKey"></a>QHttpHeader::hasKey ( const <a href="qstring.html">QString</a> & key ) const
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</h3>
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Returns TRUE if the HTTP header has an entry with the given <em>key</em>; otherwise returns FALSE.
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<p> <p>See also <a href="#value">value</a>(), <a href="#setValue">setValue</a>(), and <a href="#keys">keys</a>().
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<h3 class=fn>bool <a name="isValid"></a>QHttpHeader::isValid () const
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</h3>
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Returns TRUE if the HTTP header is valid; otherwise returns FALSE.
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<p> A QHttpHeader is invalid if it was created by parsing a malformed string.
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<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="keys"></a>QHttpHeader::keys () const
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</h3>
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Returns a list of the keys in the HTTP header.
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<p> <p>See also <a href="#hasKey">hasKey</a>().
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<h3 class=fn>int <a name="majorVersion"></a>QHttpHeader::majorVersion () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the major protocol-version of the HTTP header.
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<p>Reimplemented in <a href="qhttpresponseheader.html#majorVersion">QHttpResponseHeader</a> and <a href="qhttprequestheader.html#majorVersion">QHttpRequestHeader</a>.
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<h3 class=fn>int <a name="minorVersion"></a>QHttpHeader::minorVersion () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the minor protocol-version of the HTTP header.
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<p>Reimplemented in <a href="qhttpresponseheader.html#minorVersion">QHttpResponseHeader</a> and <a href="qhttprequestheader.html#minorVersion">QHttpRequestHeader</a>.
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<h3 class=fn><a href="qhttpheader.html">QHttpHeader</a> & <a name="operator-eq"></a>QHttpHeader::operator= ( const <a href="qhttpheader.html">QHttpHeader</a> & h )
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</h3>
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Assigns <em>h</em> and returns a reference to this http header.
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<h3 class=fn>void <a name="removeValue"></a>QHttpHeader::removeValue ( const <a href="qstring.html">QString</a> & key )
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</h3>
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Removes the entry with the key <em>key</em> from the HTTP header.
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<p> <p>See also <a href="#value">value</a>() and <a href="#setValue">setValue</a>().
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<h3 class=fn>void <a name="setContentLength"></a>QHttpHeader::setContentLength ( int len )
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</h3>
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Sets the value of the special HTTP header field <tt>content-length</tt>
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to <em>len</em>.
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<p> <p>See also <a href="#contentLength">contentLength</a>() and <a href="#hasContentLength">hasContentLength</a>().
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<h3 class=fn>void <a name="setContentType"></a>QHttpHeader::setContentType ( const <a href="qstring.html">QString</a> & type )
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</h3>
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Sets the value of the special HTTP header field <tt>content-type</tt> to
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<em>type</em>.
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<p> <p>See also <a href="#contentType">contentType</a>() and <a href="#hasContentType">hasContentType</a>().
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<p>Example: <a href="archivesearch-example.html#x475">network/archivesearch/archivedialog.ui.h</a>.
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<h3 class=fn>void <a name="setValue"></a>QHttpHeader::setValue ( const <a href="qstring.html">QString</a> & key, const <a href="qstring.html">QString</a> & value )
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</h3>
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Sets the value of the entry with the <em>key</em> to <em>value</em>.
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<p> If no entry with <em>key</em> exists, a new entry with the given <em>key</em>
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and <em>value</em> is created. If an entry with the <em>key</em> already
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exists, its value is discarded and replaced with the given <em>value</em>.
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<p> <p>See also <a href="#value">value</a>(), <a href="#hasKey">hasKey</a>(), and <a href="#removeValue">removeValue</a>().
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<p>Example: <a href="archivesearch-example.html#x476">network/archivesearch/archivedialog.ui.h</a>.
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<h3 class=fn><a href="qstring.html">QString</a> <a name="toString"></a>QHttpHeader::toString () const<tt> [virtual]</tt>
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</h3>
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Returns a string representation of the HTTP header.
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<p> The string is suitable for use by the constructor that takes a
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<a href="qstring.html">QString</a>. It consists of lines with the format: key, colon, space,
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value, "\r\n".
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<h3 class=fn><a href="qstring.html">QString</a> <a name="value"></a>QHttpHeader::value ( const <a href="qstring.html">QString</a> & key ) const
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</h3>
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Returns the value for the entry with the given <em>key</em>. If no entry
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has this <em>key</em>, an empty string is returned.
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<p> <p>See also <a href="#setValue">setValue</a>(), <a href="#removeValue">removeValue</a>(), <a href="#hasKey">hasKey</a>(), and <a href="#keys">keys</a>().
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">Qt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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