c/c++网络编程单纯http客户端，服务器端

网络编程 单纯http客户端，服务器端

1，http客户端

2，http服务器端

http客户端：

#include #include #include #include #include #include #include #include #include int main(int argc, char* argv[]){  int err;  int sock;  char buf[32];  char* deststr;  addrinfo hints, *res0, *res;  if(argc != 2){return 1;}  deststr = argv[1];  memset(&hints, 0, sizeof(hints));  hints.ai_socktype = SOCK_STREAM;  hints.ai_family = PF_UNSPEC;  if((err = getaddrinfo(deststr, "http", &hints, &res0)) != 0){    printf("error %d:%sn", err, gai_strerror(err));    return 1;  }  for(res = res0; res != NULL; res = res->ai_next){    printf("%dn", res->ai_family);    sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);    if(sock < 0){continue;}    if(connect(sock, res->ai_addr, res->ai_addrlen) != 0){      close(sock);      continue;    }    break;  }  freeaddrinfo(res0);  if(res == NULL){    printf("failedn");    return 1;  }  snprintf(buf, sizeof(buf), "GET / HTTP/1.0rnrn");  int n = write(sock, buf, (int)strlen(buf));  while(n > 0){    n = read(sock, buf, sizeof(buf));    write(fileno(stdout), buf, n);  }  close(sock);  return 0;}

github源代码

发送端的执行方式：

./a.out www.baidu.com

http服务器端

#include #include #include #include #include #include #include #include #include int main(){  int sock0;  sockaddr_in client;  socklen_t len;  int sock;  int yes = 1;  addrinfo *res, hints;  int err;  char buf[2048];  int n;  char inbuf[2048];  hints.ai_family = AF_INET;  hints.ai_flags = AI_PASSIVE;  hints.ai_socktype = SOCK_STREAM;  err = getaddrinfo(NULL, "12345", &hints, &res);  if(err != 0){    printf("getaddrinfo %sn", gai_strerror(err));    return 1;  }  sock0 = socket(res->ai_family, res->ai_socktype, 0);  setsockopt(sock0, SOL_SOCKET, SO_REUSEADDR, (const char*)&yes, sizeof(yes));  bind(sock0, res->ai_addr, res->ai_addrlen);  listen(sock0, 5);  snprintf(buf, sizeof(buf),       "HTTP/1.0 200 OKrn"       "Content-Length: 20rn"       "Content-Type:text/htmlrn"       "rn"       "HELLOrn");  while(1){    len = sizeof(client);    sock = accept(sock0, (sockaddr*)&client, &len);    n = read(sock, inbuf, sizeof(inbuf));    write(fileno(stdout), inbuf, n);    write(sock, buf, (int)strlen(buf));    close(sock);  }  close(sock0);  return 0;}

github源代码

测试方式：

在浏览器里输入：http://127.0.0.1:12345或者输入：http://localhost:12345

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