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    39. 

  39.       <span class="refentrytitle">nanohttp</span>
    40. 

  40.     </h2>
    41. 

  41.     <p>nanohttp - minimal HTTP implementation</p>
    42. 

  42.     <p>minimal HTTP implementation allowing to fetch resources like external subset. </p>
    43. 

  43.     <p>Author(s): Daniel Veillard </p>
    44. 

  44.     <div class="refsynopsisdiv">
    45. 

  45.       <h2>Synopsis</h2>
    46. 

  46.       <pre class="synopsis">int	<a href="#xmlNanoHTTPRead">xmlNanoHTTPRead</a>			(void * ctx, <br/>					 void * dest, <br/>					 int len);
    47. 

  47. int	<a href="#xmlNanoHTTPSave">xmlNanoHTTPSave</a>			(void * ctxt, <br/>					 const char * filename);
    48. 

  48. const char *	<a href="#xmlNanoHTTPRedir">xmlNanoHTTPRedir</a>	(void * ctx);
    49. 

  49. const char *	<a href="#xmlNanoHTTPAuthHeader">xmlNanoHTTPAuthHeader</a>	(void * ctx);
    50. 

  50. int	<a href="#xmlNanoHTTPFetch">xmlNanoHTTPFetch</a>		(const char * URL, <br/>					 const char * filename, <br/>					 char ** contentType);
    51. 

  51. int	<a href="#xmlNanoHTTPContentLength">xmlNanoHTTPContentLength</a>	(void * ctx);
    52. 

  52. const char *	<a href="#xmlNanoHTTPMimeType">xmlNanoHTTPMimeType</a>	(void * ctx);
    53. 

  53. void	<a href="#xmlNanoHTTPClose">xmlNanoHTTPClose</a>		(void * ctx);
    54. 

  54. void	<a href="#xmlNanoHTTPCleanup">xmlNanoHTTPCleanup</a>		(void);
    55. 

  55. 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);
    56. 

  56. void	<a href="#xmlNanoHTTPInit">xmlNanoHTTPInit</a>			(void);
    57. 

  57. void *	<a href="#xmlNanoHTTPOpen">xmlNanoHTTPOpen</a>			(const char * URL, <br/>					 char ** contentType);
    58. 

  58. void *	<a href="#xmlNanoHTTPOpenRedir">xmlNanoHTTPOpenRedir</a>		(const char * URL, <br/>					 char ** contentType, <br/>					 char ** redir);
    59. 

  59. 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);
    60. 

  60. void	<a href="#xmlNanoHTTPScanProxy">xmlNanoHTTPScanProxy</a>		(const char * URL);
    61. 

  61. const char *	<a href="#xmlNanoHTTPEncoding">xmlNanoHTTPEncoding</a>	(void * ctx);
    62. 

  62. int	<a href="#xmlNanoHTTPReturnCode">xmlNanoHTTPReturnCode</a>		(void * ctx);
    63. 

  63. </pre>
    64. 

  64.     </div>
    65. 

  65.     <div class="refsect1" lang="en">
    66. 

  66.       <h2>Description</h2>
    67. 

  67.     </div>
    68. 

  68.     <div class="refsect1" lang="en">
    69. 

  69.       <h2>Details</h2>
    70. 

  70.       <div class="refsect2" lang="en">
    71. 

  71.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPAuthHeader"/>xmlNanoHTTPAuthHeader ()</h3><pre class="programlisting">const char *	xmlNanoHTTPAuthHeader	(void * ctx)<br/>
    72. 

  72. </pre><p>Get the authentication header of an HTTP context</p>
    73. 

  73. <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>
    74. 

  74.         <hr/>
    75. 

  75.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPCleanup"/>xmlNanoHTTPCleanup ()</h3><pre class="programlisting">void	xmlNanoHTTPCleanup		(void)<br/>
    76. 

  76. </pre><p>Cleanup the HTTP protocol layer.</p>
    77. 

  77. </div>
    78. 

  78.         <hr/>
    79. 

  79.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPClose"/>xmlNanoHTTPClose ()</h3><pre class="programlisting">void	xmlNanoHTTPClose		(void * ctx)<br/>
    80. 

  80. </pre><p>This function closes an HTTP context, it ends up the connection and free all data related to it.</p>
    81. 

  81. <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>
    82. 

  82.         <hr/>
    83. 

  83.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPContentLength"/>xmlNanoHTTPContentLength ()</h3><pre class="programlisting">int	xmlNanoHTTPContentLength	(void * ctx)<br/>
    84. 

  84. </pre><p>Provides the specified content length from the HTTP header.</p>
    85. 

  85. <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>
    86. 

  86.         <hr/>
    87. 

  87.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPEncoding"/>xmlNanoHTTPEncoding ()</h3><pre class="programlisting">const char *	xmlNanoHTTPEncoding	(void * ctx)<br/>
    88. 

  88. </pre><p>Provides the specified encoding if specified in the HTTP headers.</p>
    89. 

  89. <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>
    90. 

  90.         <hr/>
    91. 

  91.         <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/>
    92. 

  92. </pre><p>This function try to fetch the indicated resource via HTTP GET and save it's content in the file.</p>
    93. 

  93. <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>
    94. 

  94.         <hr/>
    95. 

  95.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPInit"/>xmlNanoHTTPInit ()</h3><pre class="programlisting">void	xmlNanoHTTPInit			(void)<br/>
    96. 

  96. </pre><p>Initialize the HTTP protocol layer. Currently it just checks for proxy informations</p>
    97. 

  97. </div>
    98. 

  98.         <hr/>
    99. 

  99.         <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/>
    100. 

  100. </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>
    101. 

  101. <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>
    102. 

  102.         <hr/>
    103. 

  103.         <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/>
    104. 

  104. </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>
    105. 

  105. <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>
    106. 

  106.         <hr/>
    107. 

  107.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPMimeType"/>xmlNanoHTTPMimeType ()</h3><pre class="programlisting">const char *	xmlNanoHTTPMimeType	(void * ctx)<br/>
    108. 

  108. </pre><p>Provides the specified Mime-Type if specified in the HTTP headers.</p>
    109. 

  109. <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>
    110. 

  110.         <hr/>
    111. 

  111.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPOpen"/>xmlNanoHTTPOpen ()</h3><pre class="programlisting">void *	xmlNanoHTTPOpen			(const char * URL, <br/>					 char ** contentType)<br/>
    112. 

  112. </pre><p>This function try to open a connection to the indicated resource via HTTP GET.</p>
    113. 

  113. <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>
    114. 

  114.         <hr/>
    115. 

  115.         <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/>
    116. 

  116. </pre><p>This function try to open a connection to the indicated resource via HTTP GET.</p>
    117. 

  117. <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>
    118. 

  118.         <hr/>
    119. 

  119.         <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/>
    120. 

  120. </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>
    121. 

  121. <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>
    122. 

  122.         <hr/>
    123. 

  123.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPRedir"/>xmlNanoHTTPRedir ()</h3><pre class="programlisting">const char *	xmlNanoHTTPRedir	(void * ctx)<br/>
    124. 

  124. </pre><p>Provides the specified redirection URL if available from the HTTP header.</p>
    125. 

  125. <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>
    126. 

  126.         <hr/>
    127. 

  127.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPReturnCode"/>xmlNanoHTTPReturnCode ()</h3><pre class="programlisting">int	xmlNanoHTTPReturnCode		(void * ctx)<br/>
    128. 

  128. </pre><p>Get the latest HTTP return code received</p>
    129. 

  129. <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>
    130. 

  130.         <hr/>
    131. 

  131.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPSave"/>xmlNanoHTTPSave ()</h3><pre class="programlisting">int	xmlNanoHTTPSave			(void * ctxt, <br/>					 const char * filename)<br/>
    132. 

  132. </pre><p>This function saves the output of the HTTP transaction to a file It closes and free the context at the end</p>
    133. 

  133. <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>
    134. 

  134.         <hr/>
    135. 

  135.         <div class="refsect2" lang="en"><h3><a name="xmlNanoHTTPScanProxy"/>xmlNanoHTTPScanProxy ()</h3><pre class="programlisting">void	xmlNanoHTTPScanProxy		(const char * URL)<br/>
    136. 

  136. </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>
    137. 

  137. <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>
    138. 

  138.         <hr/>
    139. 

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    140. 

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    141. 

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    142. 

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    143.