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<html><head><meta name="keywords" content="php php4 http webdav client file fetching"> |
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<meta name="author" content="Léo WEST"> |
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<body> |
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<a name="sec_1"><h1> HTTP Client class</h1></a> |
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<p class="text"> Net_HTTP_Client is an almost complete HTTP Client, implementing all <strong>HTTP</strong> methods and a subset of <strong>WebDAV</strong> the standard web publishing protocol.<br> |
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<br> |
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<a href="zip/httpclient.zip">Download httpclient.zip</a>, a zip archive providing the class and documentation.<br> |
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<br> |
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</p><a name="sec_2"><h3> Informations</h3></a> |
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<p class="text"> Version : 0.7<br> |
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Licence : GPL - You may send a mail if you enjoy this component<br> |
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Lastmod : Aug 2001<br> |
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Author : <a href="mailto:west_leo@yahoo-REMOVE-.com?subject=HttpClient">Leo West</a><br> |
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<br> |
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</p><a name="sec_3"><h3> Documentation</h3></a> |
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|
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<ul> |
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<ul> |
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<ul> |
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<li> <a class="index" href="#sec_4">Sample use</a> |
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<ul> |
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<li> <a class="index" href="#sec_5">A minimal example</a> |
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<li> <a class="index" href="#sec_6">Using HTTP/1.1 persistent connexions</a> |
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</ul> |
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<li> <a class="index" href="#sec_7">Main methods</a> |
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<ul> |
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<li> <a class="index" href="#sec_8">Net_HTTP_Client( [host, port] )</a> |
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<li> <a class="index" href="#sec_9">Connect( host, port )</a> |
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<li> <a class="index" href="#sec_10">Disconnect()</a> |
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<li> <a class="index" href="#sec_11">setHeaders( headers )</a> |
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<li> <a class="index" href="#sec_12">removeHeader( headerName )</a> |
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<li> <a class="index" href="#sec_13">setCredentials( username, password )</a> |
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<li> <a class="index" href="#sec_14">setProtocolVersion( version )</a> |
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<li> <a class="index" href="#sec_15">setProxy( proxyHost, proxyPort )</a> |
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<li> <a class="index" href="#sec_16">addHeader( headerName, headerValue )</a> |
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<li> <a class="index" href="#sec_16a">addCookie( cookieName, cookieValue )</a> |
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<li> <a class="index" href="#sec_16b">removeCookies()</a> |
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<li> <a class="index" href="#sec_17">Get( uri )</a> |
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<li> <a class="index" href="#sec_18">getHeaders()</a> |
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<li> <a class="index" href="#sec_19">getBody()</a> |
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<li> <a class="index" href="#sec_20">Head( uri )</a> |
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<li> <a class="index" href="#sec_20a">Options( uri )</a> |
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<li> <a class="index" href="#sec_21">Post( uri, query_params )</a> |
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</ul> |
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<li> <a class="index" href="#sec_22">WebDAV methods</a> |
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<ul> |
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<li> <a class="index" href="#sec_23">Copy( srcUri, destUri, overwrite )</a> |
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<li> <a class="index" href="#sec_24">Delete( uri )</a> |
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<li> <a class="index" href="#sec_25">Move( srcUri, destUri, overwrite )</a> |
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<li> <a class="index" href="#sec_26">MkCol( uri )</a> |
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<li> <a class="index" href="#sec_27">PropFind( uri, scope )</a> |
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<li> <a class="index" href="#sec_28">Put( uri, filecontent )</a> |
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<li> <a class="index" href="#sec_29">Lock( uri, lockScope, lockType, lockOwner )</a> |
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<li> <a class="index" href="#sec_30">Unlock( uri, lockToken )</a> |
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</ul> |
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<li> <a class="index" href="#sec_31">Diagnostics and debug</a> |
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<ul> |
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<li> <a class="index" href="#sec_32">getStatus()</a> |
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<li> <a class="index" href="#sec_33">getStatusMessage()</a> |
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<li> <a class="index" href="#sec_34">setDebug( flags )</a> |
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<li> <a class="index" href="#sec_35">Other methods</a> |
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</ul> |
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<li> <a class="index" href="#sec_36">Changelog</a> |
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<li> <a class="index" href="#sec_37">References</a> |
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|
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</ul> |
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</ul> |
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</ul> |
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<a name="sec_4"><h3> Sample use</h3></a> |
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<a name="sec_5"><h4> A minimal example</h4></a> |
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<div class="code"><p class="text"> include "Net/HTTP/Client.php";<br> |
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<br> |
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$http = new Net_HTTP_Client();<br> |
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$http->Connect( "somehost", 80 ) or die( "Connect problem" );<br> |
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$status = $http->Get( "/index.html" );<br> |
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if( $status != 200 )<br> |
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die( "Problem : " . $http->getStatusMessage() );<br> |
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else<br> |
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echo $http->getBody();<br> |
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$http->Disconnect();<br> |
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</div> |
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<br> |
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</p><a name="sec_6"><h4> Using HTTP/1.1 persistent connexions</h4></a> |
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<div class="code"><p class="text"> $http = new Net_HTTP_Client( "dir.yahoo.com", 80 );<br> |
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$http->setProtocolVersion( "1.1" );<br> |
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$http->addHeader( "Host", "dir.yahoo.com" );<br> |
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$http->addHeader( "Connection", "keep-alive" );<br> |
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<br> |
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if( $http->Get( "/Reference/Libraries/" ) == 200 )<br> |
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$page1 = $http->getBody();<br> |
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<br> |
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if( $http->Get( "/News_and_Media/" ) == 200 )<br> |
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$page2 = $http->getBody();<br> |
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$http->disconnect();<br> |
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</div> |
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<br> |
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</p><a name="sec_7"><h3> Main methods</h3></a> |
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<a name="sec_8"><h4> Net_HTTP_Client( [host, port] )</h4></a> |
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<p class="text"> Class constructor<br> |
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parameters host and port are optional, but when defined, the connection is immediate.<br> |
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<strong>seeAlso</strong> : Connect method<br> |
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<br> |
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</p><a name="sec_9"><h4> Connect( host, port )</h4></a> |
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<p class="text"> Open the connection to the server<br> |
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<span class="code">host</span> is the server address (or IP)<br> |
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<span class="code">port</span> is the optional server listening port, defaults to 80<br> |
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return true if successfull, false is connection failed. Use getStatusMessage to examine the error problem<br> |
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<br> |
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</p><a name="sec_10"><h4> Disconnect()</h4></a> |
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<p class="text"> close the connection to the server<br> |
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<br> |
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</p><a name="sec_11"><h4> setHeaders( headers )</h4></a> |
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<p class="text"> Define all HTTP headers to be sent during next requests.<br> |
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<span class="code">headers</span> is an array containing the headers in the form "headerName" => "headerValue"<br> |
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header names are case sensitive in this class.<br> |
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<br> |
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</p><a name="sec_12"><h4> removeHeader( headerName )</h4></a> |
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<p class="text"> unset a request header<br> |
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<span class="code">headerName</span> is the header name. Be aware i choose to use <strong>case sensitive</strong> headers.<br> |
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<br> |
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</p><a name="sec_13"><h4> setCredentials( username, password )</h4></a> |
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<p class="text"> Set the username and password to access a protected resource on the server.<br> |
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Only "Basic" authentication scheme is supported yet<br> |
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<br> |
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<span class="code">username </span> The user identifier<br> |
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<span class="code">password </span> The user password (clear form)<br> |
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<br> |
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</p><a name="sec_14"><h4> setProtocolVersion( version )</h4></a> |
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<p class="text"> Define the HTTP protocol version to use<br> |
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<span class="code">version</span> is a string representing the version number, with one digit: "0.9", "1.0", "1.1"<br> |
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return false if the version number is bad, true if OK<br> |
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<br> |
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Note that for some obscure reasons, persistent connexions sometimes fail with some versions of PHP (4.0.6 notably)<br> |
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Socket gurus, you may track down the problem in the processBody() code.<br> |
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<br> |
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</p><a name="sec_15"><h4> setProxy( proxyHost, proxyPort )</h4></a> |
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<p class="text"> Instruct the class to use a connect through a proxy. Tested only against HTTP proxies (Squid etc.)<br> |
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<br> |
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<span class="code">proxyHost</span> is the proxy address, <span class="code">proxyPort</span> the proxy port, usually 80 or 8080<br> |
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<br> |
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</p><a name="sec_16"><h4> addHeader( headerName, headerValue )</h4></a> |
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<p class="text"> Define a request header to be sent during next requests. headerName is case sensitive<br> |
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<span class="code">headerName</span> HTTP header name<br> |
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<span class="code">headerValue</span> HTTP header value<br> |
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<br> |
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</p><a name="sec_16a"><h4> addCookie( cookieName, cookieValue )</h4></a> |
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<p class="text"> set a cookie to use for the next requests<br>cookie is a session-type cookie. |
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|
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<span class="code">cookieName</span> cookie name<br> |
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<span class="code">cookieValue</span> cookie value<br> |
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<small>[since v0.7]</small> |
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<br> |
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</p><a name="sec_16b"><h4> removeCookies( )</h4></a> |
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<p class="text"> discards all defined cookies<br> |
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<small>[since v0.7]</small> |
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<br> |
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</p><a name="sec_17"><h4> Get( uri )</h4></a> |
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<p class="text"> issue a GET http request<br> |
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<span class="code">$uri</span> is the URI of the document<br> |
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<span class="code">Returns</span> the status code received from server (200 if ok)<br> |
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see Also getHeaders & getBody methods<br> |
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<br> |
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</p><a name="sec_18"><h4> getHeaders()</h4></a> |
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<p class="text"> return the response headers. Headers are returned as an (headername => value) array.<br> |
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To be called after a request, to examine the headers returned by server: Set-Cookie, Location or whatever.<br> |
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<div class="code"> $status = $http->Get( "/" );<br> |
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...<br> |
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// document is somewhere else<br> |
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if( $status == 301 || $status == 302 || $status == 307 )<br> |
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{<br> |
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$headers = $http->getHeaders();<br> |
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$status = $http->Get( $headers["Location"] );<br> |
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}<br> |
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<br> |
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</div> |
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<br> |
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</p><a name="sec_19"><h4> getBody()</h4></a> |
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<p class="text"> return a string containing the response body, to be used after a Get or Post call for instance.<br> |
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<br> |
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</p><a name="sec_20"><h4> Head( uri )</h4></a> |
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<p class="text"> issue a HEAD request<br> |
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$uri is a string containing the URI of the document ( the part of the URL after the host and port /)<br> |
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<strong>Returns</strong> the status code received from server (200 if ok)<br> |
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To examine the headers content, see getResponseHeaders method<br> |
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<br> |
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</p><a name="sec_20a"><h4> Options( uri )</h4></a> |
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<p class="text"> issue an OPTIONS request<br> |
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<span class="code">uri</span> document URI, usually "/"<br> |
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Returns an array with the options supported by the server<br> |
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<small>[since v0.7]</small> |
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<br> |
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</p><a name="sec_21"><h4> Post( uri, query_params )</h4></a> |
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<p class="text"> issue a POST http request<br> |
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<span class="code">uri</span> is the URI of the document<br> |
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<span class="code">query_params</span> is an hash array containg the form parameters to send<br> |
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Returns the status code received from server (200 if ok)<br> |
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<br> |
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<strong>Example</strong><br> |
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<div class="code"> $params = array( "login" => "scott", "password" => "tiger" );<br> |
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$status = $http->post( "/login.php", $params );<br> |
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</div> |
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<br> |
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</p><a name="sec_22"><h3> WebDAV methods</h3></a> |
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<a name="sec_23"><h4> Copy( srcUri, destUri, overwrite )</h4></a> |
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<p class="text"> Copy an existing file on the server into a new place, using the COPY request<br> |
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<br> |
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<span class="code">srcUri</span> is the current file location on the server. dont forget the heading "/"<br> |
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<span class="code">destUri</span> is the destination location on the server. this is *not* a full URL<br> |
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<span class="code">overwrite</span> indicates whether to overwrite (true) or leave (false) an existing destination. overwrite by default<br> |
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Returns the status code 204 (Unchanged) if OK.<br> |
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<br> |
| 323 |
<span class="code">$status = $http->Copy( "/sources/client.php", "/backup/client-0.4.php", true );</span><br> |
| 324 |
<br> |
| 325 |
</p><a name="sec_24"><h4> Delete( uri )</h4></a> |
| 326 |
<p class="text"> Delete a file on the server using the "DELETE" HTTP-DAV request<br> |
| 327 |
<span class="code">uri</span> the location of the file on the server.<br> |
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Returns the status code (204 if OK)<br> |
| 329 |
<br> |
| 330 |
Note: This HTTP method is *not* widely supported, and only partially supports "collection"<br> |
| 331 |
deletion, as the XML response is not parsed.<br> |
| 332 |
<br> |
| 333 |
</p><a name="sec_25"><h4> Move( srcUri, destUri, overwrite )</h4></a> |
| 334 |
<p class="text"> Move or rename a resource on the server, using the MOVE request.<br> |
| 335 |
<span class="code">srcUri</span> is the current file location on the server. dont forget the heading /<br> |
| 336 |
<span class="code">destUri</span> the destination location on the server. this is *not* a full URL<br> |
| 337 |
<span class="code">overwrite</span> is a boolean set to true to overwrite an existing destination.<br> |
| 338 |
Return the response status code as a string, 204 (Unchanged) if OK.<br> |
| 339 |
<br> |
| 340 |
</p><a name="sec_26"><h4> MkCol( uri )</h4></a> |
| 341 |
<p class="text"> Send a MKCOL HTTP-DAV request<br> |
| 342 |
Create a collection (usually a directory) on the server.<br> |
| 343 |
<span class="code">uri</span> is the collection's location on the server.<br> |
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Return the status code, 201 (Created) if OK<br> |
| 345 |
<br> |
| 346 |
</p><a name="sec_27"><h4> PropFind( uri, scope )</h4></a> |
| 347 |
<p class="text"> Retrieves meta informations about a resource on the server, using the WebDAV PROPFIND method<br> |
| 348 |
The XML reply body is <strong>not parsed</strong>, therfore you will have to do it :)<br> |
| 349 |
<br> |
| 350 |
<span class="code">uri</span> the location of the file on the server<br> |
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<span class="code">scope</span> set the scope of the request, (somehow similar to the LDAP scope notion):<br> |
| 352 |
To retrieve infos about the node only (0), for the node and its direct children (1), or "Infinity" infos for the node and all its descendant nodes.<br> |
| 353 |
<br> |
| 354 |
Returns the response status code, 207 (Multi-Status) if OK<br> |
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<br> |
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</p><a name="sec_28"><h4> Put( uri, filecontent )</h4></a> |
| 357 |
<p class="text"> Send a PUT request<br> |
| 358 |
PUT is the method to sending a file on the server. it is *not* widely supported<br> |
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<span class="code">uri</span> the location of the file on the server. dont forget the heading "/"<br> |
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<span class="code">filecontent</span> is the content of the file. binary content accepted<br> |
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Returns the status code as a string, 201 (Created) if OK.<br> |
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<br> |
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</p><a name="sec_29"><h4> Lock( uri, lockScope, lockType, lockOwner )</h4></a> |
| 364 |
<p class="text"> <span class="note">WARNING: experimental</span><br> |
| 365 |
Lock a ressource on the server and return 200 if locking went OK.<br> |
| 366 |
The XML reply is not parsed for now [translate: Your help is welcome].<br> |
| 367 |
<br> |
| 368 |
<span class="code">uri </span> URL of the resource to lock<br> |
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<span class="code">lockScope </span> scope of the lock. Use "exclusive" for an private lock, "inclusive" for a shared lock.<br> |
| 370 |
<span class="code">lockType </span> Access type for the lock : Use "write", ?<br> |
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<span class="code">lockOwner </span> An URL representing the owner of this lock<br> |
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<br> |
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<div class="code"> $reply = $http->Lock( "/docs/manual.html", "inclusive", "write", "leo@leo.com" );<br> |
| 374 |
if( $reply != 200 ) {<br> |
| 375 |
$msg = $http->getStatusMessage();<br> |
| 376 |
die( "Unlock problem, server says $msg" );<br> |
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} else {<br> |
| 378 |
$xmlResponse = $http->getBody();<br> |
| 379 |
// TODO : parse the XML response here<br> |
| 380 |
}<br> |
| 381 |
</div> |
| 382 |
<br> |
| 383 |
</p><a name="sec_30"><h4> Unlock( uri, lockToken )</h4></a> |
| 384 |
<p class="text"> <span class="note">WARNING: experimental</span><br> |
| 385 |
Release a lock on a remote file and return the response code (204 if unlock OK)<br> |
| 386 |
<span class="code">uri</span> The relative URL of the resource to unlock<br> |
| 387 |
<span class="code">lockToken</span> The lock token given at lock time, eg: opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4<br> |
| 388 |
<br> |
| 389 |
<div class="code"> $token = "opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4";<br> |
| 390 |
$reply = $http->Unlock( "/docs/manual.html", $token );<br> |
| 391 |
if( $reply != 204 ) {<br> |
| 392 |
$msg = $http->getStatusMessage();<br> |
| 393 |
die( "Unlock problem, server says $msg" );<br> |
| 394 |
}<br> |
| 395 |
</div> |
| 396 |
<br> |
| 397 |
</p><a name="sec_31"><h3> Diagnostics and debug</h3></a> |
| 398 |
<a name="sec_32"><h4> getStatus()</h4></a> |
| 399 |
<p class="text"> Return the server status code for the last request.<br> |
| 400 |
HTTP codes are divided in classes (where x is a digit)<br> |
| 401 |
<br> |
| 402 |
- 20x : request processed OK<br> |
| 403 |
- 30x : document moved<br> |
| 404 |
- 40x : client error ( bad url, document not found, etc...)<br> |
| 405 |
- 50x : server error<br> |
| 406 |
<br> |
| 407 |
</p><a name="sec_33"><h4> getStatusMessage()</h4></a> |
| 408 |
<p class="text"> Returns the full response status of the last request, in the form "CODE Message"<br> |
| 409 |
Example : <span class="code">404 Document not found</span><br> |
| 410 |
<br> |
| 411 |
</p><a name="sec_34"><h4> setDebug( flags )</h4></a> |
| 412 |
<p class="text"> Turn on debug messages<br> |
| 413 |
<span class="code">$client->setDebug( DBGTRACE | DBGINDATA );</span><br> |
| 414 |
<br> |
| 415 |
Flags is a bit mask of following debug modes:<br> |
| 416 |
</p><!-- table --><table class="params"> |
| 417 |
<tr> <td class="params">DBGTRACE</td> |
| 418 |
<td class="params">to trace methods calls stack</td> |
| 419 |
</tr> |
| 420 |
<tr> <td class="params">DBGINDATA</td> |
| 421 |
<td class="params">to debug data received from server</td> |
| 422 |
</tr> |
| 423 |
<tr> <td class="params">DBGOUTDATA</td> |
| 424 |
<td class="params">to debug data sent</td> |
| 425 |
</tr> |
| 426 |
<tr> <td class="params">DBGLOW</td> |
| 427 |
<td class="params">to debug low-level (usually internal) methods</td> |
| 428 |
</tr> |
| 429 |
<tr> <td class="params">DBGSOCK</td> |
| 430 |
<td class="params">to debug socket-level stuff</td> |
| 431 |
</tr> |
| 432 |
</table><a name="sec_35"><h4> Other methods</h4></a> |
| 433 |
<p class="text"> sendCommand, makeURI, processReply, processHeader, processBody, readReply, flushReply<br> |
| 434 |
These methods are private therefore not documented and USUALLY NOT FOR DIRECT USE.<br> |
| 435 |
<br> |
| 436 |
</p><a name="sec_36"><h3> Changelog</h3></a> |
| 437 |
<p class="text"><pre> |
| 438 |
0.1 initial version |
| 439 |
0.2 documentation completed |
| 440 |
+ getHeaders(), getBody() |
| 441 |
o Post(), Connect() |
| 442 |
0.3 DAV enhancements: |
| 443 |
+ Put() method |
| 444 |
0.4 continued DAV support |
| 445 |
+ Delete(), Move(), MkCol(), Propfind() methods |
| 446 |
o added url property, remove host and port properties |
| 447 |
o Connect, Net_HTTP_Client (use of this.url) |
| 448 |
o processBody() : use non-blocking to fix a socket pblm |
| 449 |
0.5 debug support |
| 450 |
+ setDebug() |
| 451 |
+ debug levels definitions (DBG*) |
| 452 |
0.6 + Lock() method |
| 453 |
+ setCredentials() method and fix - thanks Thomas Olsen |
| 454 |
+ support for Get( full_url ) |
| 455 |
o fix POST call (duplicate content-length) - thanks to Javier Sixto |
| 456 |
0.7 + OPTIONS method support |
| 457 |
+ addCookie and removeCookies methods |
| 458 |
o fix the "0" problem |
| 459 |
o fix undefined variable warning |
| 460 |
</pre> |
| 461 |
</p><a name="sec_37"><h3> References</h3></a> |
| 462 |
<p class="text"> RFC2616 "Hypertext Transfer Protocol -- HTTP/1.1"<br> |
| 463 |
<a href="http://lwest.free.fr/doc/protocols/http/rfc2616.html" target="_new">http://lwest.free.fr/doc/protocols/http/rfc2616.html</a><br> |
| 464 |
<br> |
| 465 |
RFC2518 "HTTP Extensions for Distributed Authoring WEBDAV"<br> |
| 466 |
<a href="http://lwest.free.fr/doc/protocols/http/rfc2518.html" target="_new">http://lwest.free.fr/doc/protocols/http/rfc2518.html</a><br> |
| 467 |
<br> |
| 468 |
WebDAV Community Site<br> |
| 469 |
<a href="http://www.webdav.org" target="_new">http://www.webdav.org</a><br> |
| 470 |
<br> |
| 471 |
</body> |
| 472 |
</html> |
| 473 |
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