TWebBrowser和URL

问题描述

我正在开发一种软​​件，以验证将其从 D5 移植到 XE5 的问题.在 D5 中，每次用户单击显示的表单的提交"按钮时，都会调用 TWebBrowser.BeforeNavigate2 .在XE5中并非如此.我发现这是因为提交的URL包含 http:/aDirectory/ExecToBeCall.exe .如果在之后添加一个额外的/，则表示该事件为火.

I'm working on a software to verify the problem of porting it from D5 to XE5. In D5, TWebBrowser.BeforeNavigate2 was call each time the user click on the submit button of a displayed form. In XE5, it's not the case. I figured out it is because the URL for the submit contain http:/aDirectory/ExecToBeCall.exe. If I add an extra / after: the event is fire.

在D5下，URL更改为:

Under D5 the URL is change for:

http://localhost/aDirectory/ExecToBeCall.exe (添加了空格以断开帖子中的链接)

http ://localhost/aDirectory/ExecToBeCall.exe (space added to break the link in the post)

在 D5 下的 TWebBrowser 仍然可以触发并更改URL的行为对于该软件很重要，而我不能更改 HTML (关于2000个文件)包含2.它使我们知道提交是在Delphi内部还是从外部浏览器进行的.我尝试了 TWebBrowser 的其他新事件，但没有一个发生.

That behavior of TWebBrowser under D5 to fire anyway and change the URL is important for the software and I cannot change the HTML (about 2000 files) to contain 2. It allowed us to know if the submit was made inside Delphi or from a outside Browser. I tried other and newer events of TWebBrowser and none are fire.

如何通知我有问题的URL，将其检查并将其更改为本地URL?小型且清洁的方法将是更可取的.

How can I be informed of a problematic URL, check it and change it into a localhost URL? A small and clean method would be preferable.

感谢您的帮助和建议

推荐答案

如果要重定向意外的URL而不是导航至该URL，可以从TEmbeddedWB项目开始，也可以通过扩展 TWebBrowser 进行DIY.带有 IDocHostUIHandler 的类，该类具有有趣的方法 TranslateURL .

If you want to redirect unexpected url instead of navigating to it, you can start with TEmbeddedWB project or you can DIY by extending TWebBrowser class with IDocHostUIHandler, which has an interesting method TranslateURL.

function TAdvWebBrowser.TranslateURL(const dwTranslate: DWORD; const pchURLIn: POLESTR; var ppchURLOut: POLESTR): HRESULT;
var
  Url: string;
  BufferSize: Integer;
begin
  Url := PChar(pchURLIn);
  if GetSafeUrlFor(Url) then
  begin
    ppchURLOut := CoTaskMemAlloc(BufferSize);
    CopyMemory(ppchURLOut, PChar(Url), BufferSize);

    // redirects to new location
    Result := S_OK;
  end
  else
    // no redirection
    Result := S_FALSE;
end;

// You can change the function to add more complex redirection rules
function GetSafeUrlFor(var Url: string): Boolean;
begin
  Result := Url.EndsWithText('.exe');
  if Result then
    Url := 'http://localhost/';
end;

这篇关于TWebBrowser和URL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！