我在用linux下用C编写HTTP服务端，发现传送mp3文件（大概5M）时程序崩溃情况。抓取报文分析是客户端发了FIN报文，应该是其关闭TCP连接导致。gdb也显示收到SIGPIPE信号。
但同样的文件，浏览器另存为时，数据传输正常。此程序浏览网页也是正常的。

传输文件的代码如下：

void SendHtmlContent(int client, char * path )
{
        FILE *resource ;
        char buf[1448];
        char ContentType[50] ;
        int len ;

        GetContentTypeByExName(path , ContentType ) ;
        //printf( "\tContentType : %s\n" , ContentType ) ;
        resource = fopen( path , "rb") ;

        //Get File Size
        fseek(resource, 0L, SEEK_END); // go to file end
        len = ftell(resource); //Get offset from head
        fseek(resource, 0L, SEEK_SET); // go to file head
        SendOkHeaders(client) ;

        sprintf(buf, "Content-Type: %s\r\n", ContentType);
        send(client, buf, strlen(buf), 0);
        sprintf(buf, "Accept-Ranges: bytes\r\nContent-Length: %d\r\n",len);
        send(client, buf, strlen(buf), 0);
        strcpy(buf, "\r\n");
        send(client, buf, strlen(buf), 0);
        len = fread( buf , sizeof(char) , sizeof(buf) , resource) ;
        while (len == sizeof(buf) )
        {
                if( ( rst = send(client, buf, len, 0) ) == -1 )
                {
                        len= -1 ;
                        break ;
                }

                len = fread( buf , sizeof(char) , sizeof(buf) , resource) ;
                //usleep(1000);

        }

        if( len > 0 )
        {
                send(client, buf, len, 0);
        }

        fclose(resource) ;
}

完整代码在https://