Question

我试图从DLL（连接到程序）获取请求，但无论我尝试什么，一切都会挂起。

我尝试使用CURL和WinHttpClient。两者都做了同样的事情，但略有不同。

CURL使程序挂起很长时间，然后什么都没有显示（该代码没有被注释，并且包含来自其他Stack Overflow问题的代码。）

WinHttpClient立即返回任何内容。

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
//#include "WinHttpClient/WinHttpClient.h"
#include <windows.h>
#include <iostream>
#include <stdio.h>
#include <curl/curl.h>

using namespace std; // fix later

static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
    ((std::string*)userp)->append((char*)contents, size * nmemb);
    return size * nmemb;
}

extern "C" __declspec(dllexport) void Quack();

__declspec(dllexport) void Quack() {
    /*WinHttpClient client(L"http://www.google.com");
    client.SetUserAgent(L"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1;...)");

    client.SendHttpRequest();
    wstring httpResponseHeader = client.GetResponseHeader();
    wstring httpResponseContent = client.GetResponseContent();

    std::string thingstr((const char*)&httpResponseContent[0], sizeof(wchar_t) / sizeof(char)*httpResponseContent.size());

    LPCSTR thing = (LPCSTR)httpResponseContent.c_str();

    MessageBoxA(NULL, thing, "Quack", MB_OK);*/

    CURL *curl;
    CURLcode res;
    std::string readBuffer;

    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
        res = curl_easy_perform(curl);
        curl_easy_cleanup(curl);
    }

    MessageBoxA(NULL, (LPCSTR)readBuffer.c_str(), "Quack", MB_OK);
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
        case DLL_PROCESS_ATTACH:
            Quack();
        case DLL_THREAD_ATTACH:
        case DLL_THREAD_DETACH:
        case DLL_PROCESS_DETACH:
            break;
    }
    return TRUE;
}

有没有人有解决方案？任何答案或建议都表示赞赏。

DLL中的HTTP请求不返回任何内容

0 个答案: