소켓을 이용한 간단한 HTTP 클라이언트

물론 버그 있음 ^_^;;

001:    /* http://img.yahoo.co.kr/home/img/v2.gif */

002: 

003: #include <stdio.h>

004: #include <stdlib.h>

005: #include <string.h>

006: #include <winsock2.h>

007: 

008: void ErrorHandling(char *message);

009: 

010: int main(int argc, char **argv)

011: {

012:     WSADATA wsaData;

013:     SOCKET hSocket;

014:     FILE *fp;

015:         FILE *fp2;

016:         struct hostent *h;

017:         char *file;

018:         char *t;

019:         char *domain;

020:         char argv1_data[100] = {0,        };

021:         char file_name[100] = { 0, };

022:         char query[100] = { 0,         };

023:         int strLen;

024:         int i = 0;

025:         int rd;

026: 

027:     SOCKADDR_IN servAddr;

028:         

029:         if(argc != 3) {

030:         printf("Usage : %s <IP> <PORT>

", argv[0]);

031:         exit(1);

032:     }

033:     

034:         strcat(argv1_data, argv[1]);

035: 

036:         t = strtok(argv[1], "//");

037:         if ( t != NULL )

038:         {

039:                 t = strtok(NULL,"/");

040:         }

041:         else 

042:         {

043:                 t = strtok(argv[1] , "/" );

044:         }

045:         

046:         domain = t;

047: 

048:         do 

049:         {

050:                 t = strtok(NULL , "/" );

051:                 if (t != NULL ) file = t;

052:         } while ( t != NULL ) ;

053: 

054:         if ( file == "" ) {

055:                 printf("화일명이 잘못되었습니다.

");

056:                 exit(1);

057:         }

058: 

059:         strcat(file_name, file);

060:         printf("File Name	%s

", file_name);        

061:         printf("Domain Name	%s

", domain);

062:      

063:   

064:     /* Load WinSocket 2.2 DLL */

065:     if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)

066:         ErrorHandling("WSAStartup() error!");

067:         

068:     /* 서버 접속을 위한 소켓 생성 */

069:     hSocket=socket(PF_INET, SOCK_STREAM, 0);

070:     if(hSocket==INVALID_SOCKET)

071:         ErrorHandling("hSocketet() error");

072:     

073:         h = gethostbyname(domain);

074:         if(!h) ErrorHandling("gethost... error");

075: 

076:     printf("Host name	%s

", h->h_name);

077:         printf("IP Address	%s

", inet_ntoa( *(IN_ADDR*)h->h_addr_list[0] ));

078:     domain = inet_ntoa( *(IN_ADDR*)h->h_addr_list[0] ); 

079: 

080:     memset(&servAddr, 0, sizeof(servAddr));

081:     servAddr.sin_family=AF_INET;

082:     servAddr.sin_addr.s_addr=inet_addr(domain);

083:     servAddr.sin_port=htons(atoi(argv[2]));

084:   

085:         if(connect(hSocket, (SOCKADDR*)&servAddr, sizeof(servAddr))==SOCKET_ERROR) /* 서버로 연결 요청 */

086:         ErrorHandling("connect() error!");

087:        

088: 

089:     /* 데이터 수신 */

090:         printf("연결되었습니다.

");

091: 

092:         strcat(query, "GET ");

093: 

094:         t = strtok(argv1_data, "//");

095: 

096:         if ( t != NULL ) {

097:                 t = strtok(NULL,"/");

098:         } else {

099:                 t = strtok(argv1_data , "/" );

100:         }

101:         

102: 

103:         do 

104:         {

105:                 t = strtok(NULL , "/" );

106:                 if (t != NULL ) {

107:                         strcat(query,"/");

108:                         strcat(query, t);

109:                 }

110:         } while ( t != NULL ) ;

111:         strcat(query,"



");

112:         printf("QUERY	%s", query);

113: 

114:         // 서버로 쿼리를 날리도록 하자.



115:         send(hSocket,query, strlen(query),MSG_OOB);

116:         

117: 

118:         // 서버에서 도착하는 데이터를 읽어서 화면에 출력하도록 하자.



119:         while ( recv(hSocket,&rd,1,0) > 0 )

120:         {

121:                 printf("%c",rd);

122:         }

123: 

124:     closesocket(hSocket); /* 연결 종료 */

125:     WSACleanup();

126:     return 0;

127: }

128: 

129: void ErrorHandling(char *message)

130: {

131:     fputs(message, stderr);

132:     fputc('

', stderr);

133:     exit(1);

134: }     

135: 

invalid-file