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libhttpd 相关函数介绍

jackyhwei 发布于 2011-09-28 10:31 点击:次 
libhttpd is a lib for supporting interaction using http protocols.you can use it to quickly build an http server.
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libhttpd is a lib for supporting interaction using http protocols.

you can use it to quickly build an http server.

LibHttpd是一个开源轻量级嵌入式Web server，LibHttpd实现了下述功能：

  • 实现了HTTP的子集；
  • 使用表格技术自动处理Html Form数据；
  • 产生的内容既可以是静态的网页，也可以是调用C函数动态产生的(callback)；

LibHttpd提供API，利用这些API，用户可以很方便地将自己的Web内容加入到程序当中。

LibHTTPD相关函数介绍

-----------------------------------------------------------------------------------
httpdCreate ( ) 创建WEB服务器

httpd * httpdCreate ( host , port )  
 char * host 
 int port 

Example :  
 server = httpdCreate( “192.168.1.1”, HTTP_PORT);

 if ( server == NULL )  
     perror ( “Couldn’t create HTTP server” ); 
 
 server2 = httpdCreate ( NULL , 2048 );

------------------------------------------------------------------------------------
httpdSetAccessLog( ) 设置访问日志文件

httpdSetAccessLog ( server, fp )  
 httpd *server; 
 FILE *fp;

Example :  
 fp = fopen ( “/tmp/access.log”, “a” ); 
 httpdSetAccessLog ( server, fp );


--------------------------------------------------------------------
httpdSetErrorLog( ) 设置错误日志文件

httpdSetErrorLog ( server, fp )  
 httpd *server; 
 FILE *fp;

Example :  
 httpdSetErrorLog ( server, stderr );

------------------------------------------------------------------------
httpdSetFileBase( ) 设置文件基本路径名
 
httpdSetErrorLog ( server, path )  
 httpd *server; 
 char *path;

Example :  
 httpdSetFileBase ( server, “/usr/local/www-pages” );

------------------------------------------------------------------------
httpdAddCContent( ) 调用C函数产生输出内容
 
httpdAddCContent ( server, dir, name, indexFlag, preload, functPtr )  
 httpd *server; 
 char *dir, *name; 
 int  indexFlag, (*)( )preload; 
 void  (*)( ) functPtr;

Example :  
 void index_callbackl ( server ) 
   httpd *server; 
 { 
    httpdOutput(server, “<HTML><BODY>Hello There</BODY></HTML>\n”); 
 } 
 
 httpdAddCContent( server, “/”, “index.html”, HTTP_TRUE, NULL, index_callback); 
------------------------------------------------------------------------------------
httpdAddFileContent( ) 将一个外部文件加入到输出内容

httpdAddFileContent ( server, dir, name, indexFlag, preload, path )  
 httpd *server; 
 char *dir, *name; 
 int  indexFlag, (*) ( ) preload; 
 char *path;

Example :  
 httpdAddFileContent( server, “/”, “index.html”, HTTP_TRUE, NULL,  “/usr/local/www/index.html” );

-----------------------------------------------------------------------------------
httpdAddStaticContent( ) 将一个内部文本BUFFER加入到HTML输出内容

httpdAddStaticContent ( server, dir, name, indexFlag, preload, buf )  
 httpd *server; 
 char *dir, *name; 
 int  indexFlag, (*)( ) preload; 
 char *buf;

Example :  
 #define index_content “<HTML><BODY>Hello There</BODY></HTML>\n” 
 httpdAddStaticContent( server, “/”, “index.html”, HTTP_TRUE, NULL, index_content );

------------------------------------------------------------------------------------
httpdAddWildcardContent( ) 增加与通配符匹配的文件内容
 
httpdAddWildcardContent ( server, dir, preload, path )  
 httpd *server; 
 char *dir; 
 int  (*) ( )preload; 
 char *path;

Example :  
        httpdAddWildcardContent(server,“/graphics”, NULL, “/usr/local/www/graphics” );

-----------------------------------------------------------------------------------
httpdAddCWildcardContent( ) 请求指定目录中的任何文件时调用C回调函数

httpdAddCWildcardContent ( server, dir, preload, functPtr )  
 httpd *server; 
 char *dir; 
 int  (*) ( )preload; 
 void  (*)( ) functPtr;

Example :  
      httpdAddCWildcardContent(server,“/users”, NULL, send_user_info );

---------------------------------------------------------------------------------
httpdGetConnection ( ) 接受一个HTTP连接请求

int httpdGetConnection ( server , timeout)  
 httpd *server; 
 struct timeval *timeout;

-----------------------------------------------------------------------
httpdReadRequest ( ) 读取并保存从客户端发送过来的请求和数据

int httpdReadRequest ( server )  
 httpd *server;

-------------------------------------------------------------------------
httpdProcessRequest ( ) 对请求进行处理，并将请求内容发送到客户端浏览器
 
httpdProcessRequest ( server )  
 httpd *server;

----------------------------------------------------------------------
httpdEndRequest ( ) 请求结束处理
 
httpdEndRequest ( server )  
 httpd *server;

----------------------------------------------------------------------
httpdOutput ( ) 将文本BUFFER内容发送到客户端浏览器

httpdOutput ( server, buffer )  
 httpd *server; 
 char *buffer

Example :  
 httpdOutput ( server, “Hello $name. Welcome to the test server” );

----------------------------------------------------------------------
httpdPrintf ( ) 按指定格式将内容输出到客户端浏览器
 
httpdPrintf ( server, format, arg, arg, … )  
 httpd *server; 
 char *format;

Example :  
 httpdPrintf( server, “Hello %s.  Welcome to the server running in process number %d”， 
 username, getpid( )  );

-------------------------------------------------------------------------
httpdSetContentType ( ) 设置除HTML文本以外的内容类型
 
httpdSetContentType( server, type )  
 httpd *server; 
 char *type

Example :  
 httpdSetContentType ( server, “image/jpeg” );

------------------------------------------------------------------------
httpdSetResponse ( ) 设置返回给客户端浏览器的的响应代码

httpdSetResponse( server, responseInfo )  
 httpd *server; 
 char *responseInfo;

Example :  
 httpdSetResponse ( server, “301 Moved Permanently” );

-------------------------------------------------------------------
httpdAddHeader ( ) 增加HTML头内容
 
httpdAddHeader( server, header )  
 httpd *server; 
 char *header;

Example :  
 httpdSetResponse ( server, “307 Temporary Redirect” ); 
 httpdAddHeader ( server, “Location: http://www.foo.com/some/new/location”);

---------------------------------------------------------------------------------
httpdSendHeaders( ) 发送HTML头
 
httpdSendHeaders( server)  
 httpd *server;

Example :  
 httpdSetContentType ( server, “image/jpeg” ); 
 httpdSendHeaders ( server ); 
 generateJpegData( server );

---------------------------------------------------------------------------------
httpVar * httpdGetVariableByName ( ) 在符号表中查找变量

httpdGetVariableByName( server, varName )  
 httpd *server; 
 char *varName;

Example :  
 varPtr = httpdGetVariableByName ( server, “username” ); 
 if ( varPtr != NULL) 
 uname = varPtr->value ;

------------------------------------------------------------------------------
httpVar * httpdGetVariableByPrefix ( ) 获取第一个与指定前缀相匹配的变量

httpdGetVariableByPrefixe( server, prefix )  
 httpd *server; 
 char *prefix;

-------------------------------------------------------------------------
httpVar * httpdGetNextVariableByPrefix ( ) 获取下一个与指定前缀相匹配的变量

httpdGetNextVariableByPrefixe( varPtr, prefix )  
 httpVar *varPtr; 
 char *prefix;


Example :  
 varPtr = httpdGetVariableByPrefix ( server, “hughes_” ); 
 while ( varPtr != NULL )  
 { 
          printf(“Name = %s, Value = %s \n”, varPtr->name, varPtr->value; 
     varPtr = httpdGetNextVariableByPrefix ( varPtr, “hughes_” ); 
 }
 
------------------------------------------------------------------------
httpVar * httpdGetVariableByPrefixedName ( ) 在符号表中查找变量

httpdGetVariableByPrefixedName( varPtr, prefix, remainder )  
 httpVar *varPtr; 
 char  *prefix, *remainder; 

Example :  
 prefixPtr = httpdGetVariableByName ( server, “multi-select-values” ); 
 while ( prefixPtr != NULL ) 
 { 
    prefix = prefixPtr->value; 
    varPtr = httpdGetVariableByPrefixedName(server, prefix, “_username”); 
    printf(“%s_username = %s\n”, prefix, varPtr->value; 
    prefixPtr = prefixPtr->nextValue; 
 } 
 
------------------------------------------------------------------------------
httpdAddVariable( ) 在符号表中增加变量

httpdAddVariable( server, name, value )  
 httpd *server; 
 char  *name, *value; 

Example :  
 httpdAddVariable( server, “background_color”, “#FFFF30” ); 
 httpdOutput( server, “<BODY BGCOLOR=$background_color>\n”);

---------------------------------------------------------------------------
httpdDumpVariables( ) Dump符号表内容
 
httpdDumpVariables( server )  
 httpd *server;

-------------------------------------------------------------------------
httpdSet( ) 设置

httpdSet( server, name, value )  
 httpd *server; 
 char *name, *value;

---------------------------------------------------------------------------
httpdAuthenticate( ) 使用用户名和口令进行身份认证
 
httpdAuthenticate( server, realm )  
 httpd *server; 
 char *realm;

---------------------------------------------------------------------------
httpdForceAuthenticate( ) 强迫身份认证
 
httpdForceAuthenticate( server, realm )  
 httpd *server; 
 char *realm;

------------------------------------------------------------------------------
httpdAddAcl( ) 在ACL表中增加访问控制项
 
httpdAddAcl( server, acl, cidrAddr, action )  
 httpd *server; 
 httpAcl *acl; 
 char *cidrAddr; 
 int action

-----------------------------------------------------------------------------
httpdSetDefaultAcl( ) 设置默认ACL
 
httpdSetDefaultAcl( server, acl )  
 httpd *server; 
 httpAcl *acl;

--------------------------------------------------------------------
httpdCheckAcl( ) 进行ACL检查
 
httpdCheckAcl( server, acl )  
 httpd *server; 
 httpAcl *acl;

-------------------------------------------------------------------
httpdUrlEncode( ) 进行URL解码
 
char * httpdUrlEncode( buf )  
 char *buf;

-------------------------------------------------------------------
httpdRequestMethod( ) 获取访问方式（HTTP_GET/HTTP_POST）
 
int httpdRequestMethod( server )  
 httpd *server;

--------------------------------------------------------------------
httpdRequestMethodName( ) 获取访问方式名字
 
char *httpdRequestMethodName( server )  
 httpd *server;

------------------------------------------------------------------
httpdRequestPath( ) 获取URL请求路径

char *httpdRequestPath( server )  
 httpd *server;

----------------------------------------------------------------------
httpdRequestContentType( ) 获取当前请求内容类型

char *httpdRequestContentType( server )  
 httpd *server;

-----------------------------------------------------------------------
httpdRequestContentLength( ) 获取当前请求发送的内容长度
 
int httpdRequestContentLength( server )  
 httpd *server;

-----------------------------------------------------------------------

(xgzhang)
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本文出处：blog.sina.com.cn/xgzhang　作者：xgzhang
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