Question

我正在使用一些C ++套接字示例。客户端运行并可以连接到服务器但无法发送文件。我认为send()存在问题，但我无法修复它。编辑：错误消息是“通过对等方重置连接”

欢迎任何想法。

我使用OpenSuSE和QT 4.7.4

这是发送和接收功能

void str_server(int sock)
{
    char buf[1025];
    const char* filename = "//home//romanov//Documents//HelloWorld-build-desktop-Qt_4_7_4_in_PATH__System__Release//ss.png";

    FILE *file = fopen(filename, "rb");
    if (!file)
    {

        cerr<<"Can't open file for reading";
        return;
    }
    while (!feof(file))
    {
        int rval = fread(buf, 1, sizeof(buf), file);//read value
        if (rval < 1)
        {

            cerr<<"Can't read from file";
            fclose(file);
            return;
        }

        int off = 0;
        do
        {
            int sent = send(sock, &buf[off], rval - off, 0);
            if (sent < 1)
            {
                // if the socket is non-blocking, then check
                // the socket error for WSAEWOULDBLOCK/EAGAIN
                // (depending on platform) and if true then
                // use select() to wait for a small period of
                // time to see if the socket becomes writable
                // again before failing the transfer...

                cout<<"Can't write to socket";
                fclose(file);
                return;
            }

            off += sent;
        }
        while (off < rval);
    }

    fclose(file);
}

// ===================

void RecvFile(int winsock)
{
    int rval;
    char buf[1025];
    FILE *file = fopen("//home//romanov//Documents//HelloWorld-build-desktop-Qt_4_7_4_in_PATH__System__Release//ss2.png", "wb");
    if (!file)
    {
        printf("Can't open file for writing");
        return;
    }

    do
    {
        rval = recv(winsock, buf, sizeof(buf), 0);
        if (rval < 0)
        {
            // if the socket is non-blocking, then check
            // the socket error for WSAEWOULDBLOCK/EAGAIN
            // (depending on platform) and if true then
            // use select() to wait for a small period of
            // time to see if the socket becomes readable
            // again before failing the transfer...

            printf("Can't read from socket");
            fclose(file);
            return;
        }

        if (rval == 0)
            break; //line 159

        int off = 0;
        do
        {
            int written = fwrite(&buf[off], 1, rval - off, file);
            if (written < 1)
            {
                printf("Can't write to file");
                fclose(file);
                return;
            }

            off += written;
        }
        while (off < rval);
    }  //line 175
    while (1);
    fclose(file);
}

Answer 1

嗯，问题是我的不好，recvFile() {{1}}，如果你们遇到同样的问题，你应该检查一下。

无法通过套接字发送文件

1 个答案: