http1.rar_Programming with C_qt chm

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <arpa/inet.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> #include <unistd.h> #include <errno.h> #define BUFSIZE 1024 #define DestIp "211.94.144.100" //"www.baidu.com" #define DestPort 80 #define Req "GET /index.html HTTP/1.1\r\nHost: 211.94.144.100\r\nConnection: Close\r\n\r\n" #define ReqLen sizeof(Req) unsigned long dns(const char* host_name) { struct hostent* host = gethostbyname(host_name); struct in_addr addr; char ** pp; pp = host->h_addr_list; if (*pp!=NULL) { addr.s_addr = *((unsigned int *)*pp); printf("address is %s\n",inet_ntoa(addr)); pp++; return addr.s_addr; } return 0; } int main(int argc, char *argv[]) { ssize_t i; int nRequestLen; char strResponse[BUFSIZE]={0}; char strRequest[BUFSIZE]={0}; int sockfd, numbytes; struct sockaddr_in dest_addr; /* connector's address information */ dns(DestIp); if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) { perror("socket"); exit(1); } dest_addr.sin_family = AF_INET; /* host byte order */ dest_addr.sin_port = htons(DestPort); /* short, network byte order */ dest_addr.sin_addr.s_addr = inet_addr(DestIp); /* Create and setup the connection */ if (connect(sockfd, (struct sockaddr *)&dest_addr,sizeof(struct sockaddr)) == -1) { perror("connect"); exit(1); } /* Send the request */ strncpy(strRequest, Req,ReqLen); nRequestLen = ReqLen; if (write(sockfd,strRequest,nRequestLen) == -1) { perror("write"); exit(1); } /* Read in the response */ while (1) { i = read(sockfd,strResponse,BUFSIZE-1); if (0 >= i) { break; } strResponse[i]='\0'; printf(strResponse); } /* Close the connection */ close(sockfd); }