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<TITLE>C Examples -- Example 1: nshello</TITLE>
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<a name="17805">
</a><h3>Example 1: nshello</h3>
<p><a name="14947">
</a>The following example provides a single request function which handles the /helloworld URL, returning 'Hello'. This module is the simplest of the AOLserver example modules.</p>
<p><a name="14881">
</a>This example can be found in the <code>examples/c/nshello</code> directory.</p>
<pre> <a name="14873"></a>
<a name="15043"></a>
<a name="15044"></a>#include "ns.h"
<a name="15050"></a>/*
<a name="15051"></a> * This is the simplest possible example of adding a C module
<a name="15052"></a> * to the AOLserver.
<a name="15053"></a> */
<a name="15054"></a>
<a name="15055"></a>/*
<a name="15056"></a> * The Ns_ModuleVersion exported integer is used to verify
<a name="15057"></a> * this module version when loaded. For AOLserver 2.0,
<a name="15058"></a> * 1 (one) is the only valid value for this variable.
<a name="15059"></a> */
<a name="15060"></a>int Ns_ModuleVersion = 1;
<a name="15061"></a>
<a name="15062"></a>static Ns_OpProc Hello;
<a name="15063"></a>
<a name="15064"></a>/*
<a name="15065"></a> * The Ns_ModuleInit function is the function the AOLserver
<a name="15066"></a> * will call each time the module is loaded into a
<a name="15067"></a> * server. The function is passed two parameters:
<a name="15068"></a> *
<a name="15069"></a> * hServer: The server `handle' as a string. This is the
<a name="15070"></a> * short name given to the virutal server such
<a name="15071"></a> * as `server1'.
<a name="15072"></a> *
<a name="15073"></a> * hModule: The module `handle' as a string. This is the
<a name="15074"></a> * short name given to the module such as `hello'
<a name="15075"></a> *
<a name="15076"></a> * For example, if this module is known as `hello' and loaded
<a name="15077"></a> * into the `server1' server with entries similar to the following
<a name="15078"></a> * in the nsd.ini file:
<a name="15079"></a> *
<a name="15080"></a> * [ns\servers]
<a name="15081"></a> * server1=My First Server
<a name="15082"></a> *
<a name="15083"></a> * [ns\server1\modules]
<a name="15084"></a> * hello=hello.dll ; or hello.so on Unix platforms
<a name="15085"></a> *
<a name="15086"></a> * This function would be called with "server1" and "hello" as
<a name="15087"></a> * its arguments.
<a name="15088"></a> *
<a name="15089"></a> */
<a name="15090"></a>int
<a name="15091"></a>Ns_ModuleInit(char *hServer, char *hModule)
<a name="15092"></a>{
<a name="15093"></a> Ns_RegisterRequest(hServer, "GET", "/helloworld", Hello,
<a name="15110"></a> NULL, NULL, 0);
<a name="15094"></a> return NS_OK;
<a name="15095"></a>}
<a name="15096"></a>
<a name="15097"></a>static int
<a name="15098"></a>Hello(Ns_OpContext context, Ns_Conn *conn)
<a name="15099"></a>{
<a name="15100"></a> char html[]="<HTML><BODY>Hello World.</BODY></HTML>";
<a name="15101"></a> Ns_ConnReturnHtml(conn, 200, html, strlen(html));
<a name="15102"></a> return NS_OK;
<a name="15103"></a>}
<a name="15104"></a>
<a name="15105"></a>
</pre><p>
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