如何为文本和箱缓冲区设置 WSABUF.buf

How Do I Set WSABUF.buf For Text And Bin Buffer?

本文关键字：缓冲区 设置 WSABUF buf 文本      更新时间：2023-10-16

我正在重构代码以不使用std：：vector。我该如何做到这一点？

不知何故，WSASend（） 更喜欢让 WSABUF.buf 指向 std：：vector以便它适用于图像文件（.jpg、.png 等）。

在测试过程中，image/* mimetypes 返回 net：：ERR_CONTENT_LENGTH_MISMATCH。

byte* HttpResponse::GetResponse2(ULONG *len)
{
    DWORD dwThreadId = GetCurrentThreadId();
    char *buffer = (char*)malloc(DATA_BUFSIZE);
    memset(buffer, 0, DATA_BUFSIZE);
    std::vector<byte> binbuffer = m_sbResponse;
    std::string ctstr;
    ctstr.assign(contenType.begin(), contenType.end());
    size_t siz = binbuffer.size();
    std::string ssiz = std::to_string(siz);
    strcpy_s(buffer, DATA_BUFSIZE, resp_ok);
    strcat_s(buffer, DATA_BUFSIZE, "n");
    strcat_s(buffer, DATA_BUFSIZE, "Date: ");
    strcat_s(buffer, DATA_BUFSIZE, "May 10, 2015");
    strcat_s(buffer, DATA_BUFSIZE, "n");
    strcat_s(buffer, DATA_BUFSIZE, "Content-Type: ");
    strcat_s(buffer, DATA_BUFSIZE, ctstr.c_str());
    strcat_s(buffer, DATA_BUFSIZE, "n");
    strcat_s(buffer, DATA_BUFSIZE, "Content-Length: ");
    strcat_s(buffer, DATA_BUFSIZE, ssiz.c_str());
    strcat_s(buffer, DATA_BUFSIZE, "n");
    strcat_s(buffer, DATA_BUFSIZE, "n");
    int bufsiz = strlen(buffer) + binbuffer.size() + 1;
    byte* buffer2 = (byte*)malloc(bufsiz);
    memset(buffer2, 0, bufsiz);
    strcpy_s((char*)buffer2, strlen(buffer)+1, buffer);
    int n = strlen((char*)buffer2);
    std::vector<byte>::iterator it;
    for (it = binbuffer.begin(); it != binbuffer.end(); it++)
    {
        byte b = *it;
        buffer2[n++] = b;
    }
    *len = strlen((char*)buffer2);
    return buffer2;
}

是否需要为 WSA* 设置属性才能与我尝试执行的操作一起使用？

该文件位于存储库中。

尝试更多类似的东西：

byte* HttpResponse::GetResponse2(ULONG *len)
{
    *len = 0;
    std::ostringstream oss;            
    oss << resp_ok << "n"
    oss << "Date: " << "May 10, 2015" << "n";
    oss << "Content-Type: " << contenType << "n";
    oss << "Content-Length: " << m_sbResponse.size() << "n";
    oss << "n";
    std::string s = oss.str();
    int bufsiz = s.length() + m_sbResponse.size();
    byte* buffer2 = (byte*) malloc(bufsiz);
    if (buffer2)
    {
        std::copy(s.begin(), s.end(), buffer2);
        std::copy(m_sbResponse.begin(), m_sbResponse.end(), &buffer2[s.length()]);
        *len = bufsiz;
    }
    return buffer2;
}

话虽如此，我强烈建议不要返回byte*。 您的GetResponse()方法将输出std::vector<byte>作为参数，您确实应该坚持使用该模型：

void HttpResponse::GetResponse2(std::vector<byte> *pv)
{
    pv->clear();
    std::ostringstream oss;            
    oss << resp_ok << "n"
    oss << "Date: " << "May 10, 2015" << "n";
    oss << "Content-Type: " << contenType << "n";
    oss << "Content-Length: " << m_sbResponse.size() << "n";
    oss << "n";
    std::string s = oss.str();
    pv->reserve(s.length() + m_sbResponse.size());
    std::copy(s.begin(), s.end(), std::back_inserter(*pv));
    std::copy(m_sbResponse.begin(), m_sbResponse.end(), std::back_inserter(*pv));
}
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