delphi函数，识别字符集编码

纪念不用 Delphi 开发7周年

 函数，获取web page文本，识别字符集编码；

 1 function CreateHttpRequest(proxyServer: string = ''; proxyPort: integer = 0):
 2   TIdHTTP;
 3 function DecodeHttpRequestText(InString: string): string;
 4 implementation
 5 
 6 {$R *.dfm}
 7 
 8 function DecodeHttpRequestText(InString: string): string;
 9 begin
10   Result := UpperCase(InString);
11   //google,baidu,cnblogs,localhost等测试ok...
12   if (Pos('CHARSET=', Result) = 0) or (pos('=UTF-', Result) <> 0) then
13     InString := Utf8Decode(InString);
14   Result := InString;
15 end;
16 
17 function CreateHttpRequest(proxyServer: string = ''; proxyPort: integer = 0):
18   TIdHTTP;
19 begin
20   Result := TIdHTTP.Create(nil);
21   with Result do
22   begin
23     HandleRedirects := true;
24     HTTPOptions := [hoForceEncodeParams];
25     ReadTimeout := 30000;
26     Request.Accept :=
27       'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*';
28     Request.AcceptLanguage := 'zh-cn';
29     Request.ContentType := 'application/x-www-form-urlencoded';
30     Request.UserAgent :=
31       'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 4.0)';
32     if (proxyServer <> '') then
33       proxyParams.ProxyServer := proxyServer; //'代理服务器地址';
34     if proxyPort <> 0 then
35       proxyParams.ProxyPort := proxyPort; //'代理服务器端口';
36   end;
37 end;
38 
39 procedure TForm1.btn1Click(Sender: TObject);
40 var
41   getstr: string;
42 begin
43   mmo1.Lines.Clear;
44   getstr :=DecodeHttpRequestText( CreateHttpRequest().Get(edt1.Text));
45   mmo1.Lines.Add(getstr);
46 
47 end;