Question

图像“ http://localhost:8882 /img.jpg”因为包含错误而无法显示

我正在尝试构建HTTP服务器，我使用相同的端口连接到浏览器，浏览器打开了一个.txt文件或目录，但是当我尝试打开图像时却收到上述消息，但我没有任何提示知道为什么

由于图像大小，我试图同时进行读写操作

  int send_file_request(int fd, char *path,int content_length,int size)
    {
             int fd1;
char date[128];
char buf1[4000];
char *mime = get_mime_type(path);
        char* request_shape="HTTP/1.0 200 OK\r\n"
          "Server: webserver/1.0\r\n"
          "Date: %s\r\n"
          "Content-Type: %s\r\n"
          "Content-Length: %ld\r\n"
          "Connection: close\r\n\r\n%s";

          char* request_shape_no_mime="HTTP/1.0 200 OK\r\n"
          "Server: webserver/1.0\r\n"
          "Date: %s\r\n"
          "Content-Length: %ld\r\n"
          "Connection: close\r\n\r\n";

            int len=size+strlen(request_shape)+strlen(date)+100;
          char*buf=malloc(len);

          if(mime==NULL)
            sprintf(buf,request_shape_no_mime, get_current_date(date,                sizeof(date)), content_length);
        else
      sprintf(buf,request_shape, get_current_date(date, sizeof(date)), mime, content_length);
  write_to_socket(fd,buf);

     if ((fd1 = open(path, O_RDONLY)) == -1) {
    perror("open error when transfer file");
}
      int nread;
    while ((nread = read(fd1, buf1, sizeof(buf1))) > 0) {
    if (nwrite(fd, buf1, nread) <= 0) {
        fprintf(stderr, "nwrite error when transfer file.\n");
        return -1;
    }
}
       free(buf);
   return 0;
              }

nwrite函数

 ssize_t nwrite(int fd, const void *buf, size_t count)
 {
  int nwrt;
const char *ptr = buf;
size_t nleft = count;

errno = 0;
while (nleft > 0) {
    if ((nwrt = write(fd, ptr, nleft)) > 0) {
        nleft -= nwrt;
        ptr += nwrt;
    } else if (nwrt == 0) {
        fprintf(stderr, "connection has been closed.\n");
        return 0;
    } else {
        if (errno == EINTR)
            continue;
        perror("write");
        return -1;
    }
}
return count;

}

浏览器应显示图像，但不显示

浏览器无法打开连接到服务器的图像

0 个答案: