Question

我正在尝试制作一个程序，该程序从需要您通过另一个站点登录的网站获取HTML。我遇到WinHttpSendRequest的问题。我希望所有这些都不会出错。

代码：

len = (DWORD)strlen("username=aan1982&pswd=admin1234&sub_check=1&sub_login=");
bResult = WinHttpSendRequest(hRequest,
    WINHTTP_NO_ADDITIONAL_HEADERS,
    0,
    "username=aan1982&pswd=admin1234&sub_check=1&sub_login=",
    len,
    len,
    0);

错误：

C2664 'BOOL' WinHttpSendRequest(HINTERNET,LPCWSTR,DWORD,LPVOID,DWORD,DWORD,DWORD_PTR)': cannot convert argument 4 from 'const char [55]' to 'LPVOID'

代码：

LPVOID data = "username=aan1982&pswd=admin1234&sub_check=1&sub_login=";
len =     (DWORD)strlen("username=aan1982&pswd=admin1234&sub_check=1&sub_login=");
bResult = WinHttpSendRequest(hRequest,
    WINHTTP_NO_ADDITIONAL_HEADERS,
    0,
    data,
    len,
    len,
    0);

错误：

C2440    'initializing': cannot convert from 'const char [55]' to 'LPVOID'

代码：

len = (DWORD)strlen("username=aan1982&pswd=admin1234&sub_check=1&sub_login=");
bResult = WinHttpSendRequest(hRequest,
    WINHTTP_NO_ADDITIONAL_HEADERS,
    0,
    (LPVOID)"username=aan1982&pswd=admin1234&sub_check=1&sub_login=",
    len,
    len,
    0);

错误：

LNK1120 9 unresolved externals
LNK2019 unresolved external symbol __imp__WinHttpCloseHandle@4 referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl GetHTML(void)" (?GetHTML@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ)

和其他8个类似LNK2019的

Answer 1

char    p[] = "username=aan1982&pswd=admin1234&sub_check=1&sub_login=";
LPVOID  ptr = static_cast<LPVOID>( p );
int     len = strlen( p );

C ++ WinHttpSendRequest错误C2664

1 个答案: