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Belenot
Asked:2020-08-18 18:38:48 +0000 UTC2020-08-18 18:38:48 +0000 UTC

http响应中的正文仅在大量请求之后出现

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#include "iostream"
#include "unistd.h"
#include "netinet/in.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "fcntl.h"
#include "tools.h"//мой файл. там strlen() и ip2int()
using namespace std;
int main(int argc, char** argv){
  struct sockaddr_in addr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(80);
  addr.sin_addr.s_addr = htonl(ip2int(192,168,0,1));
  int sockfd = socket(AF_INET, SOCK_STREAM, 0);
  connect(sockfd,(struct sockaddr*) &addr, sizeof(addr);
  char result[1024];
  char request_buffer[] = "GET / HTTP/1.1\r\n\r\n";//Это исправлено
  for(int i = 0; i < 20; i++){
    write(sockfd,request_buffer,strlen(request_buffer));
  }
  read(sockfd, result, 1024);
  cout << result << endl;
  close(sockfd);
  return 0;
}

如果您多次发送请求，正文就会出现。从第一次开始，只有空体的头球出现。

c++

1 个回答

  1. Best Answer

    发送两个换行符： "GET / HTTP/1.1\r\n\r\n"

    事实是，根据HTTP 1.1 规范，请求的结束是在空行之后的 \r\n，即 \r\n\r\n。这样做是为了能够发送请求标头。例如：

    (request)
    GET / HTTP/1.1
    Host: example.com

(response)
    HTTP/1.1 200 OK
    Server: server version
    Date: date
    ...
    
    <HTML>
    ...

    尝试远程登录到端口 80 - 它会变得非常清楚。

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

int main(int argc, char** argv){
  struct sockaddr_in addr;
  int status;

  status = 0;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(80);
  addr.sin_addr.s_addr = inet_addr ("127.0.0.1");
  int sockfd = socket(AF_INET, SOCK_STREAM, 0);
  connect(sockfd, (struct sockaddr*) &addr, sizeof(addr));
  char result[1025];
  char request_buffer[] = "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n";
  write(sockfd,request_buffer,strlen(request_buffer));
  while (status = read (sockfd, result, 1024)) {
      printf ("=============== READ STATUS %d =============\n", status);
      printf ("%s\n", result);
      memset (&result, 0, sizeof (result));
  }
  close(sockfd);
  return 0;
}

    我不会为了一件事而拖累所有的加加重量cout。

    • 1

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