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<?xml version="1.0" encoding="UTF-8"?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <title>nanohttp: minimal HTTP implementation</title> <meta name="generator" content="Libxml2 devhelp stylesheet"/> <link rel="start" href="index.html" title="libxml2 Reference Manual"/> <link rel="up" href="general.html" title="API"/> <link rel="stylesheet" href="style.css" type="text/css"/> <link rel="chapter" href="general.html" title="API"/> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> <tr valign="middle"> <td> <a accesskey="p" href="libxml2-nanoftp.html"> <img src="left.png" width="24" height="24" border="0" alt="Prev"/> </a> </td> <td> <a accesskey="u" href="general.html"> <img src="up.png" width="24" height="24" border="0" alt="Up"/> </a> </td> <td> <a accesskey="h" href="index.html"> <img src="home.png" width="24" height="24" border="0" alt="Home"/> </a> </td> <td> <a accesskey="n" href="libxml2-parser.html"> <img src="right.png" width="24" height="24" border="0" alt="Next"/> </a> </td> <th width="100%" align="center">libxml2 Reference Manual</th> </tr> </table> <h2> <span class="refentrytitle">nanohttp</span> </h2> <p>nanohttp - minimal HTTP implementation</p> <p>minimal HTTP implementation allowing to fetch resources like external subset. </p> <p>Author(s): Daniel Veillard </p> <div class="refsynopsisdiv"> <h2>Synopsis</h2> <pre class="synopsis">int <a href="#xmlNanoHTTPRead">xmlNanoHTTPRead</a> (void * ctx, <br/> void * dest, <br/> int len); int <a href="#xmlNanoHTTPSave">xmlNanoHTTPSave</a> (void * ctxt, <br/> const char * filename); const char * <a href="#xmlNanoHTTPRedir">xmlNanoHTTPRedir</a> (void * ctx); const char * <a href="#xmlNanoHTTPAuthHeader">xmlNanoHTTPAuthHeader</a> (void * ctx); int <a href="#xmlNanoHTTPFetch">xmlNanoHTTPFetch</a> (const char * URL, <br/> const char * filename, <br/> char ** contentType); int <a href="#xmlNanoHTTPContentLength">xmlNanoHTTPContentLength</a> (void * ctx); const char * <a href="#xmlNanoHTTPMimeType">xmlNanoHTTPMimeType</a> (void * ctx); void <a href="#xmlNanoHTTPClose">xmlNanoHTTPClose</a> (void * ctx); void <a href="#xmlNanoHTTPCleanup">xmlNanoHTTPCleanup</a> (void); void * <a href="#xmlNanoHTTPMethod">xmlNanoHTTPMethod</a> (const char * URL, <br/> const char * method, <br/> const char * input, <br/> char ** contentType, <br/> const char * headers, <br/> int ilen); void <a href="#xmlNanoHTTPInit">xmlNanoHTTPInit</a> (void); void * <a href="#xmlNanoHTTPOpen">xmlNanoHTTPOpen</a> (const char * URL, <br/> char ** contentType); void * <a href="#xmlNanoHTTPOpenRedir">xmlNanoHTTPOpenRedir</a> (const char * URL, <br/> char ** contentType, <br/> char ** redir); void * <a href="#xmlNanoHTTPMethodRedir">xmlNanoHTTPMethodRedir</a> (const char * URL, <br/> const char * method, <br/> const char * input, <br/> char ** contentType, <br/> char ** redir, <br/> const char * headers, <br/> int ilen); void <a href="#xmlNanoHTTPScanProxy">xmlNanoHTTPScanProxy</a> (const char * URL); const char * <a href="#xmlNanoHTTPEncoding">xmlNanoHTTPEncoding</a> (void * ctx); int <a href="#xmlNanoHTTPReturnCode">xmlNanoHTTPReturnCode</a> (void * ctx); </pre> </div> <div class="refsect1" lang="en"> <h2>Description</h2> </div> <div class="refsect1" lang="en"> <h2>Details</h2> <div class="refsect2" lang="en"> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPAuthHeader"/>xmlNanoHTTPAuthHeader ()</h3><pre class="programlisting">const char * xmlNanoHTTPAuthHeader (void * ctx)<br/> </pre><p>Get the authentication header of an HTTP context</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the stashed value of the WWW-Authenticate or Proxy-Authenticate header.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPCleanup"/>xmlNanoHTTPCleanup ()</h3><pre class="programlisting">void xmlNanoHTTPCleanup (void)<br/> </pre><p>Cleanup the HTTP protocol layer.</p> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPClose"/>xmlNanoHTTPClose ()</h3><pre class="programlisting">void xmlNanoHTTPClose (void * ctx)<br/> </pre><p>This function closes an HTTP context, it ends up the connection and free all data related to it.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPContentLength"/>xmlNanoHTTPContentLength ()</h3><pre class="programlisting">int xmlNanoHTTPContentLength (void * ctx)<br/> </pre><p>Provides the specified content length from the HTTP header.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the specified content length from the HTTP header. Note that a value of -1 indicates that the content length element was not included in the response header.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPEncoding"/>xmlNanoHTTPEncoding ()</h3><pre class="programlisting">const char * xmlNanoHTTPEncoding (void * ctx)<br/> </pre><p>Provides the specified encoding if specified in the HTTP headers.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the specified encoding or NULL if not available</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPFetch"/>xmlNanoHTTPFetch ()</h3><pre class="programlisting">int xmlNanoHTTPFetch (const char * URL, <br/> const char * filename, <br/> char ** contentType)<br/> </pre><p>This function try to fetch the indicated resource via HTTP GET and save it's content in the file.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The URL to load</td></tr><tr><td><span class="term"><i><tt>filename</tt></i>:</span></td><td>the filename where the content should be saved</td></tr><tr><td><span class="term"><i><tt>contentType</tt></i>:</span></td><td>if available the Content-Type information will be returned at that location</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of failure, 0 incase of success. The contentType, if provided must be freed by the caller</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPInit"/>xmlNanoHTTPInit ()</h3><pre class="programlisting">void xmlNanoHTTPInit (void)<br/> </pre><p>Initialize the HTTP protocol layer. Currently it just checks for proxy informations</p> </div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPMethod"/>xmlNanoHTTPMethod ()</h3><pre class="programlisting">void * xmlNanoHTTPMethod (const char * URL, <br/> const char * method, <br/> const char * input, <br/> char ** contentType, <br/> const char * headers, <br/> int ilen)<br/> </pre><p>This function try to open a connection to the indicated resource via HTTP using the given @method, adding the given extra headers and the input buffer for the request content.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The URL to load</td></tr><tr><td><span class="term"><i><tt>method</tt></i>:</span></td><td>the HTTP method to use</td></tr><tr><td><span class="term"><i><tt>input</tt></i>:</span></td><td>the input string if any</td></tr><tr><td><span class="term"><i><tt>contentType</tt></i>:</span></td><td>the Content-Type information IN and OUT</td></tr><tr><td><span class="term"><i><tt>headers</tt></i>:</span></td><td>the extra headers</td></tr><tr><td><span class="term"><i><tt>ilen</tt></i>:</span></td><td>input length</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of failure, otherwise a request handler. The contentType, if provided must be freed by the caller</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPMethodRedir"/>xmlNanoHTTPMethodRedir ()</h3><pre class="programlisting">void * xmlNanoHTTPMethodRedir (const char * URL, <br/> const char * method, <br/> const char * input, <br/> char ** contentType, <br/> char ** redir, <br/> const char * headers, <br/> int ilen)<br/> </pre><p>This function try to open a connection to the indicated resource via HTTP using the given @method, adding the given extra headers and the input buffer for the request content.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The URL to load</td></tr><tr><td><span class="term"><i><tt>method</tt></i>:</span></td><td>the HTTP method to use</td></tr><tr><td><span class="term"><i><tt>input</tt></i>:</span></td><td>the input string if any</td></tr><tr><td><span class="term"><i><tt>contentType</tt></i>:</span></td><td>the Content-Type information IN and OUT</td></tr><tr><td><span class="term"><i><tt>redir</tt></i>:</span></td><td>the redirected URL OUT</td></tr><tr><td><span class="term"><i><tt>headers</tt></i>:</span></td><td>the extra headers</td></tr><tr><td><span class="term"><i><tt>ilen</tt></i>:</span></td><td>input length</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of failure, otherwise a request handler. The contentType, or redir, if provided must be freed by the caller</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPMimeType"/>xmlNanoHTTPMimeType ()</h3><pre class="programlisting">const char * xmlNanoHTTPMimeType (void * ctx)<br/> </pre><p>Provides the specified Mime-Type if specified in the HTTP headers.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the specified Mime-Type or NULL if not available</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPOpen"/>xmlNanoHTTPOpen ()</h3><pre class="programlisting">void * xmlNanoHTTPOpen (const char * URL, <br/> char ** contentType)<br/> </pre><p>This function try to open a connection to the indicated resource via HTTP GET.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The URL to load</td></tr><tr><td><span class="term"><i><tt>contentType</tt></i>:</span></td><td>if available the Content-Type information will be returned at that location</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of failure, otherwise a request handler. The contentType, if provided must be freed by the caller</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPOpenRedir"/>xmlNanoHTTPOpenRedir ()</h3><pre class="programlisting">void * xmlNanoHTTPOpenRedir (const char * URL, <br/> char ** contentType, <br/> char ** redir)<br/> </pre><p>This function try to open a connection to the indicated resource via HTTP GET.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The URL to load</td></tr><tr><td><span class="term"><i><tt>contentType</tt></i>:</span></td><td>if available the Content-Type information will be returned at that location</td></tr><tr><td><span class="term"><i><tt>redir</tt></i>:</span></td><td>if available the redirected URL will be returned</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of failure, otherwise a request handler. The contentType, if provided must be freed by the caller</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPRead"/>xmlNanoHTTPRead ()</h3><pre class="programlisting">int xmlNanoHTTPRead (void * ctx, <br/> void * dest, <br/> int len)<br/> </pre><p>This function tries to read @len bytes from the existing HTTP connection and saves them in @dest. This is a blocking call.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>dest</tt></i>:</span></td><td>a buffer</td></tr><tr><td><span class="term"><i><tt>len</tt></i>:</span></td><td>the buffer length</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of byte read. 0 is an indication of an end of connection. -1 indicates a parameter error.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPRedir"/>xmlNanoHTTPRedir ()</h3><pre class="programlisting">const char * xmlNanoHTTPRedir (void * ctx)<br/> </pre><p>Provides the specified redirection URL if available from the HTTP header.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the specified redirection URL or NULL if not redirected.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPReturnCode"/>xmlNanoHTTPReturnCode ()</h3><pre class="programlisting">int xmlNanoHTTPReturnCode (void * ctx)<br/> </pre><p>Get the latest HTTP return code received</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the HTTP return code for the request.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPSave"/>xmlNanoHTTPSave ()</h3><pre class="programlisting">int xmlNanoHTTPSave (void * ctxt, <br/> const char * filename)<br/> </pre><p>This function saves the output of the HTTP transaction to a file It closes and free the context at the end</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the HTTP context</td></tr><tr><td><span class="term"><i><tt>filename</tt></i>:</span></td><td>the filename where the content should be saved</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of failure, 0 incase of success.</td></tr></tbody></table></div></div> <hr/> <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPScanProxy"/>xmlNanoHTTPScanProxy ()</h3><pre class="programlisting">void xmlNanoHTTPScanProxy (const char * URL)<br/> </pre><p>(Re)Initialize the HTTP Proxy context by parsing the URL and finding the protocol host port it indicates. Should be like http://myproxy/ or http://myproxy:3128/ A NULL URL cleans up proxy informations.</p> <div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>The proxy URL used to initialize the proxy context</td></tr></tbody></table></div></div> <hr/> </div> </div> </body> </html>