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我写了一个客户端代码来创建套接字并向客户端发送请求,并且由于HTTP 1.1使用Connection:Alive默认情况下仍然连接关闭。如何创建持久连接该服务器监听,直到连接每个请求是闭上的客户端代码:C套接字编程中的持久连接
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
void error(char *msg){
perror(msg);
exit(0);
}
int main(int argc, char *argv[])
{
int sockfd, portno, n,i;
int Max_Requests;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
if (argc < 3) {
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
Max_Requests=atoi(argv[3]);
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
server = gethostbyname(argv[1]);
if (server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,(char *)&serv_addr.sin_addr.s_addr,server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
i=0;
while(i<Max_Requests){
printf("Please enter the message: ");
bzero(buffer,256);
fgets(buffer,255,stdin);
n = write(sockfd,buffer,strlen(buffer));
if (n < 0)
error("ERROR writing to socket");
bzero(buffer,256);
n = read(sockfd,buffer,255);
if (n < 0)
error("ERROR reading from socket");
printf("%s\n",buffer);
i++;
}
return 0;
}
首先,在'argv'数组中的* first *参数是什么索引?考虑到'argv [0]'是命令名,并且第一个参数直接跟在... –
1)它是'Connection:Keep-Alive'和2)服务器不需要遵守。你只是声明你可以支持保持连接,如果它决定使用它。 – spectras
你有什么*发送*到服务器?请向我们显示请求,*逐字*。 –