linux C发送 http 请求

/*****************************************************************/

/*********** 程序名称：get_http.c ********************************/

/*********** 功能：向固定地址发起请求得到返回页面字符 ************/

/*********** 作者：YZW ******************************************/

/*********** 时间：2010-10-28 ************************************/

/*****************************************************************/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdarg.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netdb.h>

int htconnect(char *host, int port){

int white_sock;

struct hostent * site;

struct sockaddr_in me;

site = gethostbyname(host);

if (site==NULL) return -2;

white_sock = socket(AF_INET,SOCK_STREAM,0);

if (white_sock <0) return -1;

memset(&me, 0, sizeof(struct sockaddr_in));

memcpy(&me.sin_addr, site-> h_addr_list[0], site-> h_length);

me.sin_family = AF_INET;

me.sin_port = htons(port);

return (connect(white_sock, (struct sockaddr *)&me,sizeof(struct sockaddr)) <0) ? -1 : white_sock;

}

int htsend(int sock, char *fmt, ...){

char BUF[1024];

va_list argptr;

va_start(argptr,fmt);

vsprintf(BUF,fmt,argptr);

va_end(argptr);

//printf(BUF); //回显

//printf("-->%s<--\n",BUF);

return send(sock,BUF,strlen(BUF),0);

}

int main(int argc,char **argv){

int black_sock;

int M,N;

char bugs_bunny[3];

if (argc<2){

printf( "Please input the hostName. Example:\n %s www.sohu.com\n ",argv[0]);

return;

}

black_sock = htconnect(argv[1],80);

if (black_sock <1) return;

printf("循环发送请求开始\n");

printf("......\n");

M=1;N=1;

while (N==1){

if(M % 1000 == 0){printf("当前循环次数：%d \n",M); }

if(M == 1000000){break;}

htsend(black_sock, "GET / HTTP/1.0\n");

htsend(black_sock, "Host: %s\n", argv[1]);

htsend(black_sock, "\n");

//htsend(black_sock, "%c ", 10);

M++;

}

printf("循环发送请求 %d 次\n",M);

printf("收到信息Start:---->\n");

//while (read(black_sock, bugs_bunny, 1)> 0){

// printf( "%c",bugs_bunny[0]);

//}

printf( "收到信息End.<----\n ");

close(black_sock);

}

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define IPSTR "61.147.124.120"
#define PORT 80
#define BUFSIZE 1024

int main(int argc, char **argv)
{
int sockfd, ret, i, h;
struct sockaddr_in servaddr;
char str1[4096], str2[4096], buf[BUFSIZE], *str;
socklen_t len;
fd_set   t_set1;
struct timeval  tv;

if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {
printf("创建网络连接失败,本线程即将终止---socket error!\n");
exit(0);
};

bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(PORT);
if (inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 ){
printf("创建网络连接失败,本线程即将终止--inet_pton error!\n");
exit(0);
};

if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0){
printf("连接到服务器失败,connect error!\n");
exit(0);
}
printf("与远端建立了连接\n");

//发送数据
memset(str2, 0, 4096);
strcat(str2, "qqCode=474497857");
str=(char *)malloc(128);
len = strlen(str2);
sprintf(str, "%d", len);

memset(str1, 0, 4096);
strcat(str1, "POST /webservices/qqOnlineWebService.asmx/qqCheckOnline HTTP/1.1\n");
strcat(str1, "Host: www.webxml.com.cn\n");
strcat(str1, "Content-Type: application/x-www-form-urlencoded\n");
strcat(str1, "Content-Length: ");
strcat(str1, str);
strcat(str1, "\n\n");

strcat(str1, str2);
strcat(str1, "\r\n\r\n");
printf("%s\n",str1);

ret = write(sockfd,str1,strlen(str1));
if (ret < 0) {
printf("发送失败！错误代码是%d，错误信息是'%s'\n",errno, strerror(errno));
exit(0);
}else{
printf("消息发送成功，共发送了%d个字节！\n\n", ret);
}

FD_ZERO(&t_set1);
FD_SET(sockfd, &t_set1);

while(1){
sleep(2);
tv.tv_sec= 0;
tv.tv_usec= 0;
h= 0;
printf("--------------->1");
h= select(sockfd +1, &t_set1, NULL, NULL, &tv);
printf("--------------->2");

//if (h == 0) continue;
if (h < 0) {
close(sockfd);
printf("在读取数据报文时SELECT检测到异常，该异常导致线程终止！\n");
return -1;
};

if (h > 0){
memset(buf, 0, 4096);
i= read(sockfd, buf, 4095);
if (i==0){
close(sockfd);
printf("读取数据报文时发现远端关闭，该线程终止！\n");
return -1;
}

printf("%s\n", buf);
}
}
close(sockfd);

return 0;
}

/*******   http客户端程序   httpclient.c   ************/
#include   <stdio.h>
#include   <stdlib.h>
#include   <string.h>
#include   <sys/types.h>
#include   <sys/socket.h>
#include   <errno.h>
#include   <unistd.h>
#include   <netinet/in.h>
#include   <limits.h>
#include   <netdb.h>
#include   <arpa/inet.h>
#include   <ctype.h>

//////////////////////////////httpclient.c   开始///////////////////////////////////////////

/********************************************
功能：搜索字符串右边起的第一个匹配字符
********************************************/
char* Rstrchr(char* s, char x)
{
int i = strlen(s);
if(!(*s))
{
return 0;
}
while(s[i-1])
{
if(strchr(s+(i-1), x))
{
return (s+(i-1));
}
else
{
i--;
}
}
return 0;
}

/********************************************
功能：把字符串转换为全小写
********************************************/
void   ToLowerCase(char* s)
{
while(*s && *s!='\0' )
{
*s=tolower(*s++);
}
*s = '\0';
}

/**************************************************************
功能：从字符串src中分析出网站地址和端口，并得到用户要下载的文件
***************************************************************/
void GetHost(char* src, char* web, char* file, int* port)
{
char* pA;
char* pB;
memset(web, 0, sizeof(web));
memset(file, 0, sizeof(file));
*port = 0;
if(!(*src))
{
return;
}
pA = src;
if(!strncmp(pA, "http://", strlen("http://")))
{
pA = src+strlen("http://");
}
else if(!strncmp(pA, "https://", strlen( "https://")))
{
pA = src+strlen( "https://");
}
pB = strchr(pA, '/');
if(pB)
{
memcpy(web, pA, strlen(pA)-strlen(pB));
if(pB+1)
{
memcpy(file, pB+1, strlen(pB)-1);
file[strlen(pB)-1] = 0;
}
}
else
{
memcpy(web, pA, strlen(pA));
}
if(pB)
{
web[strlen(pA) - strlen(pB)] = 0;
}
else
{
web[strlen(pA)] = 0;
}
pA = strchr(web, ':');
if(pA)
{
*port = atoi(pA + 1);
}
else
{
*port = 80;
}
}

/*********************************************************************
*filename:   httpclient.c
*purpose:   HTTP协议客户端程序，可以用来下载网页
*********************************************************************/
int   main(int   argc,   char   *argv[])
{
int sockfd = 0;
char buffer[1024] = "";
struct sockaddr_in   server_addr;
struct hostent   *host;
int portnumber = 0;
int nbytes = 0;
char host_addr[256] = "";
char host_file[1024] = "";
FILE *fp;
char request[1024] = "";
int send = 0;
int totalsend = 0;
int i = 0;
char *pt;

if(argc!=2)
{
fprintf(stderr, "Usage:%s   web-address\a\n ",argv[0]);
exit(1);
}
printf( "parameter.1 is: %s\n ", argv[1]);
//ToLowerCase(argv[1]);/*将参数转换为全小写*/
//printf( "lowercase   parameter.1   is:   %s\n ",   argv[1]);

GetHost(argv[1], host_addr, host_file, &portnumber);/*分析网址、端口、文件名等*/
printf( "webhost:%s\n ", host_addr);
printf( "hostfile:%s\n ", host_file);
printf( "portnumber:%d\n\n ", portnumber);

if((host=gethostbyname(host_addr)) == NULL)/*取得主机IP地址*/
{
fprintf(stderr, "Gethostname   error,   %s\n ",   strerror(errno));
exit(1);
}

/*   客户程序开始建立   sockfd描述符   */
if((sockfd=socket(AF_INET,SOCK_STREAM,0)) == -1)/*建立SOCKET连接*/
{
fprintf(stderr, "Socket   Error:%s\a\n ",strerror(errno));
exit(1);
}

/*   客户程序填充服务端的资料   */
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(portnumber);
server_addr.sin_addr=*((struct in_addr*)host->h_addr);

/*   客户程序发起连接请求   */
if(connect(sockfd, (struct sockaddr*)(&server_addr), sizeof(struct sockaddr)) == -1)/*连接网站*/
{
fprintf(stderr, "Connect   Error:%s\a\n ",strerror(errno));
exit(1);
}

sprintf(request,   "GET   /%s   HTTP/1.1\r\nAccept:   */*\r\nAccept-Language:   zh-cn\r\n\
User-Agent:   Mozilla/4.0   (compatible;   MSIE   5.01;   Windows   NT   5.0)\r\n\
Host:   %s:%d\r\nConnection:   Close\r\n\r\n ", host_file, host_addr, portnumber);

printf( "%s\n", request);/*准备request，将要发送给主机*/

/*取得真实的文件名*/
if(host_file && *host_file)
{
pt = Rstrchr(host_file, '/');
}
else
{
pt = 0;
}

/*发送http请求request*/
send = 0;
totalsend = 0;
nbytes=strlen(request);
while(totalsend < nbytes)
{
send = write(sockfd, request+totalsend, nbytes-totalsend);
if(send == -1)
{
printf( "send error!%s\n ", strerror(errno));
exit(0);
}
totalsend += send;
printf("%d bytes send OK!\n ", totalsend);
}

printf( "\nThe   following   is   the   response   header:\n ");
i=0;
/*   连接成功了，接收http响应，response   */
while((nbytes=read(sockfd,buffer,1))==1)
{
if(i < 4)
{
if(buffer[0] == '\r' || buffer[0] == '\n')
{
i++;
}
else
{
i = 0;
}
printf( "%c ", buffer[0]);/*把http头信息打印在屏幕上*/
}
}
//	printf("\n\nresponse = %s\n", buffer);
/*   结束通讯   */
close(sockfd);
exit(0);
}
//////////////////////////////httpclient.c   结束///////////////////////////////////////////