Question

我正在使用wininet玩HttpRequests。

我尝试创建一个httpRequest来将数据发送到本地Web服务器上的PHP文件。虽然它发送，但它遭受了崩溃沿线。我的C ++代码看起来像这样

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <wininet.h>

#define PAGE_NAME "order.php"

#pragma comment (lib, "wininet")


int main()
{
    char firstname[50] = "John";
    char lastname[50] = "Darwin";
    char tel[50] = "08098688603";
    char idnumber[50] = "99057151";

    char* data = (char*)VirtualAlloc(NULL, 4052, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

    //lstrcpy(data, PAGE_NAME);
    lstrcat(data, PAGE_NAME);
    lstrcat(data, "?&firstname=%s");
    lstrcat(data, firstname);
    lstrcat(data, "&lastname=%s");
    lstrcat(data, lastname);
    lstrcat(data, "&tel=%s");
    lstrcat(data, tel);
    lstrcat(data, "&idnumber=%s");
    lstrcat(data, (char*)idnumber);

    HINTERNET hSession = InternetOpen("Vox", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    if (hSession == NULL)
        MessageBox(NULL, "Bad InternetOpen", "Error", MB_OK);

    HINTERNET hConnect = InternetConnect(hSession, "localhost", 80, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
    if (hConnect == NULL)
        MessageBox(NULL, "Bad InternetConect", "Error", MB_OK);

    HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", PAGE_NAME, NULL, NULL, (const char**)"text/*", 0, 1);
    if (hRequest == NULL)
        MessageBox(NULL, "Bad OpenRequest", "Error", MB_OK);

    if (HttpSendRequestA(hRequest, "Content-Type: app1ication/x-www-form-urlencoded", strlen("Content-Type: app1ication/x-www-form-urlencoded"), data, strlen(data)) == NULL)
        MessageBox(NULL, "Bad SendRequest", "Error", MB_OK);

    else
        MessageBox(NULL, "Data transfer Complete", "Sent Info", MB_ICONINFORMATION | MB_OK);

    InternetCloseHandle(hRequest);
    InternetCloseHandle(hConnect);
    InternetCloseHandle(hSession);



    return 0;
}

虽然它正确地将完整信息发送到php文件，但它在行

中崩溃了

 HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", PAGE_NAME, NULL, NULL, (const char**)"text/*", 0, 1);

错误

在ConsoleApplication1.exe中的0x7504712A（wininet.dll）抛出异常：0xC0000005：访问冲突读取位置0x74786574。

如果存在此异常的处理程序，则可以安全地继续该程序。

我可能缺少什么，有什么我没有得到正确的吗？

Answer 1

似乎接受类型数组没有用NULL - 指针正确终止：

指向以null结尾的字符串数组的指针，指示客户端接受的媒体类型。这是一个例子。

PCTSTR rgpszAcceptTypes[] = {_T(“text/*”), NULL};

无法使用NULL指针正确终止数组将导致崩溃。

See here.

与Wininet崩溃

1 个答案: