[TCP/IP - C언어 WWW] 간단한 소스

소켓통신 프로그램(특히 HTTP를 이용한)를 만들면서 테스트했던 소스, 나중에라도 활용할 일이 생길까 하여 남겨봅니다.

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define RCVBUFSIZE 60

void DieWithError(char *errorMessage); //Error handlig

int main(int argc, char *argv[])
{
 int sock;
 struct sockaddr_in servAddr;
 unsigned short servPort;
 char *query;
 char *servIP;
 char *sendMessage;
 char buffer[RCVBUFSIZE];
 unsigned int sendMgsLength;
 int bytesRcvd;
 int totalByteRcvd;
 
 
 servIP = "222.231.20.14";
 sendMessage = "GET /search.nsp?enc=euc_kr&page=1&q=blog HTTP/1.1\nAccept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\nReferer: http://www.1noon.com/\nAccept-Language: ko\nUA-CPU: x86\nAccept-Encoding: gzip, deflate\nUser-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322)\nHost: total.1noon.com\nConnection: Keep-Alive\n\n";
 servPort = 80;
 
 /* Create areliable, stream socket using TCP */
 if((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
  DieWithError("socket() failed\n");
 else fprintf(stdout, "socket create\n");
 
 memset(&servAddr, 0, sizeof(servAddr)); //Zero ou structure
 servAddr.sin_family = AF_INET; //Internet address family
 servAddr.sin_addr.s_addr = inet_addr(servIP); //Server IP address
 servAddr.sin_port = htons(servPort);//Server port
 
 /* Establish the connection to the web server */
 if(connect(sock, (struct sockaddr *) &servAddr, sizeof(servAddr)) < 0)
  DieWithError("connet() failed\n");
 else fprintf(stdout, "socket connect\n");
 
 sendMgsLength = strlen(sendMessage);
 
 /* send the string to the server */
 if(send(sock, sendMessage, sendMgsLength, 0) != sendMgsLength)
  DieWithError("send() sent a different number of bytes than expected\n");
 else fprintf(stdout, "send message\n");
 
 /* receive the html from the web server */
 while(1){
  bytesRcvd = recv(sock, buffer, RCVBUFSIZE-1,0);
  if(bytesRcvd <= 0)
   break;
  buffer[bytesRcvd] = '\0'; //buffer의 값이 문자열임을 알려주기 위하여...
  printf("%s", buffer);
 }
 
 close(sock);
 exit(0);
}
 
void DieWithError(char *errorMessage)
{
 printf(errorMessage);
 exit(-1);
}