我使用 InternetErrorDlg 请求登录名/密码(它是 delphi,但我认为它很清楚)
function ShowLoginDlg(Request: HINTERNET): boolean;
var
DlgError: Cardinal;
begin
DlgError := InternetErrorDlg(GetDesktopWindow, Request, 0,
FLAGS_ERROR_UI_FILTER_FOR_ERRORS or
FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS or
FLAGS_ERROR_UI_FLAGS_GENERATE_DATA, PPointer(nil)^{like NULL in C/C++});
if DlgError = ERROR_CANCELLED then Abort; // Abort raises exception
if (DlgError <> ERROR_SUCCESS) and (DlgError <> ERROR_INTERNET_FORCE_RETRY) then
RaiseLastOSError(DlgError); // RaiseLastOSError raises exception
Result := DlgError = ERROR_INTERNET_FORCE_RETRY;
end;
while True do
begin
SendRequest(Request);
if not ((GetStatusCode(Request) = 401) and ShowLoginDlg(Request)) do
Continue;
CheckStatusCode(Request); // raises exception if status code >= 400
end;
并且有一个问题。即使用户勾选“保存密码”,密码并没有真正保存。所以,当我再次关闭并打开我的程序时,网络资源返回 401 给我,我必须再次显示登录对话框。
有任何想法吗??
如果我按照 RRUZ 的建议添加 FLAGS_ERROR_UI_SERIALIZE_DIALOGS,我不会得到任何效果。我的回调没有被调用并且密码没有被保存。
function InternetAuthNotifyCallback(
dwContext: DWORD; // as passed to InternetErrorDlg
dwReturn: DWORD; // error code: success, resend, or cancel
lpReserved: Pointer // reserved: will be set to null
): DWORD; stdcall; // stdcall, is it right?
begin
Result := 0; // What do I have to do??
end;
type
PFN_AUTH_NOTIFY = function(
dwContext:DWORD;
dwReturn:DWORD;
lpReserved:Pointer): DWORD; stdcall;
PINTERNET_AUTH_NOTIFY_DATA = ^INTERNET_AUTH_NOTIFY_DATA;
INTERNET_AUTH_NOTIFY_DATA = packed record
cbStruct: DWORD;
dwOptions: DWORD;
pfnNotify: PFN_AUTH_NOTIFY;
dwContext: PDWORD;
end;
function ShowLoginDlg(Request: HINTERNET): boolean;
var
DlgError: Cardinal;
PData: Pointer;
Data: INTERNET_AUTH_NOTIFY_DATA;
begin
ZeroMemory(@Data, SizeOf(Data));
Data.cbStruct := SizeOf(Data);
Data.pfnNotify := InternetAuthNotifyCallback;
PData := @Data; // if I set PData := Pointer(1) there is **not** AV!!!!
// InternetErrorDlg don't use this parameter???
DlgError := InternetErrorDlg(Application.MainForm.Handle, Request, 0,
FLAGS_ERROR_UI_FILTER_FOR_ERRORS or
FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS or
FLAGS_ERROR_UI_FLAGS_GENERATE_DATA or
FLAGS_ERROR_UI_SERIALIZE_DIALOGS,
PData); // really InternetErrorDlg get pointer to PData, because in Delphi this param is passed by ref
if DlgError = ERROR_CANCELLED then Abort;
if (DlgError <> ERROR_SUCCESS) and (DlgError <> ERROR_INTERNET_FORCE_RETRY) then
RaiseLastOSError(DlgError);
Result := DlgError = ERROR_INTERNET_FORCE_RETRY;
end;