idHttp 中GET POST应用

 1 procedure GetDemo;
 2 var
 3   IdHttp : TIdHTTP;
 4   Url : string;//请求地址
 5   ResponseStream : TStringStream; //返回信息
 6   ResponseStr : string;
 7 begin
 8   //创建IDHTTP控件
 9   IdHttp := TIdHTTP.Create(nil);
10   //TStringStream对象用于保存响应信息
11   ResponseStream := TStringStream.Create(‘‘);
12   try
13     //请求地址
14     Url := ‘http://dict.youdao.com/‘;
15     try
16       IdHttp.Get(Url,ResponseStream);
17     except
18       on e : Exception do
19       begin
20         ShowMessage(e.Message);
21       end;
22     end;
23     //获取网页返回的信息
24     ResponseStr := ResponseStream.DataString;
25     //网页中的存在中文时，需要进行UTF8解码
26     ResponseStr := UTF8Decode(ResponseStr);
27   finally
28     IdHttp.Free;
29     ResponseStream.Free;
30   end;   
31 end;

 1 procedure PostDemo;
 2 var
 3   IdHttp : TIdHTTP;
 4   Url : string;//请求地址
 5   ResponseStream : TStringStream; //返回信息
 6   ResponseStr : string;
 7 
 8   RequestList : TStringList;     //请求信息
 9   RequestStream : TStringStream;
10 begin
11   //创建IDHTTP控件
12   IdHttp := TIdHTTP.Create(nil);
13   //TStringStream对象用于保存响应信息
14   ResponseStream := TStringStream.Create(‘‘);
15 
16   RequestStream := TStringStream.Create(‘‘);
17   RequestList := TStringList.Create;
18   try
19     Url := ‘http://f.youdao.com/?path=fanyi&vendor=fanyiinput‘;
20     try
21       //以列表的方式提交参数
22       RequestList.Add(‘text=love‘);
23       IdHttp.Post(Url,RequestList,ResponseStream);
24 
25       //以流的方式提交参数
26       RequestStream.WriteString(‘text=love‘);
27       IdHttp.Post(Url,RequestStream,ResponseStream);
28     except
29       on e : Exception do
30       begin
31         ShowMessage(e.Message);
32       end;
33     end;
34     //获取网页返回的信息
35     ResponseStr := ResponseStream.DataString;
36     //网页中的存在中文时，需要进行UTF8解码
37     ResponseStr := UTF8Decode(ResponseStr);
38   finally
39     IdHttp.Free;
40     RequestList.Free;
41     RequestStream.Free;
42     ResponseStream.Free;
43   end;
44 end;