Question

嘿，我正在创建一个发送/接收文件的简单程序，我的代码发送文本文件但是当涉及到二进制时它开始出错，代码：

static void
send_event(conn,file)
  void *conn;
  void *file;
{
   FILE *f;
   char *buffer;
   int32_t block_size;
   int32_t size;
   size_t __read;
   ConnectionQueue *q;
   f = (FILE *)file;
   q = (ConnectionQueue *)conn;
   block_size = conf_getint("transfer:block_size");
   if (block_size <= 1 || block_size > 1024)
     {
       abort();
       return;
     }
   buffer = (char *)MyMalloc(block_size);
   if (!q || !f)
     return;

   fseek(f,0L,SEEK_END);
   size = ftell(f);
   if (size == 0L)
     {
       send_socket(q->conn,"RECEIVE: 302 FSE");
       return;
    }
   fseek(f,0,SEEK_SET);
   while (true)
    {
      if (q->abort)
       {
         send_socket(q->conn,"RECEIVE: File transfer aborted\n");
         if (f)
           fclose(f);
         f = NULL;
         MyFree(buffer);
         return;
       }
      __sleep(100);
       __read = fread(buffer,sizeof(char),512,f);
       if (__read <= 0)
         {
           send_socket(q->conn,"RECEIVE: EOF\n");
           break;
         }
      if (*buffer == '\0')
        {
          send_socket(q->conn,"RECEIVE: EOF\n");
          break;
        }

      send_socket(q->conn,"RECEIVE: %s\n",buffer);
   }
   send_socket(q->conn,"RECEIVE: 915 EOF\n");
   fclose(f);
   f = NULL;
   MyFree(buffer);
}

固定：请检查我的回答\ /

Answer 1

K＆amp; R语法和void *参数有什么用？

static void send_event( ConnectionQueue * conn, FILE * file) {
....

在二进制文本与文本上，通常这是因为您使用“r”而不是“rb”作为模式打开文件。

 __read = fread(buffer,sizeof(char),512,f);

您应该使用block_size而不是512。

if (*buffer == '\0')
...
send_socket(q->conn,"RECEIVE: %s\n",buffer);

你的“二进制文件”可能包含0 - 这不是一个好的EOF标记，如果你在strlen中使用send_socket，你的数据会在你的第一个0处被截断缓冲液中。

Answer 2

这修复了它 - ＆gt; Send binary file in HTTP response using C sockets

通过winsock / linux套接字发送文件

2 个答案: