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(Delphi ActiveX) URL Encoding Charset in POST Query ParamsDemonstrates how to control the URL encoding charset in POST query params. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; nameWin1252Encoded: WideString; sb: TChilkatStringBuilder; http: TChilkatHttp; req: TChilkatHttpRequest; resp: TChilkatHttpResponse; begin success := 0; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // We have the string "MÆRSK". nameWin1252Encoded := 'M%E6RSK'; sb := TChilkatStringBuilder.Create(Self); success := sb.DecodeAndAppend(nameWin1252Encoded,'url','windows-1252'); http := TChilkatHttp.Create(Self); // We're setting the session log filename so we can see the exact request sent. http.SessionLogFilename := 'qa_output/sessionLog.txt'; // First demonstrate a simple application/x-www-form-urlencoded POST req := TChilkatHttpRequest.Create(Self); // Set the Charset = "utf-8" to cause URL encoding to use utf-8. req.Charset := 'utf-8'; req.AddParam('name',sb.GetAsString()); req.HttpVerb := 'POST'; req.HttpVerb := 'POST'; req.ContentType := 'application/x-www-form-urlencoded'; resp := TChilkatHttpResponse.Create(Self); success := http.HttpReq('https://www.chilkatsoft.com/something',req.ControlInterface,resp.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; // This is the request that is sent: // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6) // POST /something HTTP/1.1 // Host: www.chilkatsoft.com // Content-Type: application/x-www-form-urlencoded // Content-Length: 15 // // name=M%C3%A6RSK // --------------------------------------------------------------- // Switch to windows-1252 req.Charset := 'windows-1252'; req.HttpVerb := 'POST'; req.ContentType := 'application/x-www-form-urlencoded'; success := http.HttpReq('https://www.chilkatsoft.com/something',req.ControlInterface,resp.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; // This is the request that is sent: // Notice that windows-1252 is used in the query param (the letter 'Æ' is %E6) // POST /something HTTP/1.1 // Host: www.chilkatsoft.com // Content-Type: application/x-www-form-urlencoded // Content-Length: 12 // // name=M%E6RSK // --------------------------------------------------------------- // Let's do the same with HttpSReq, switching back to utf-8 req.Path := '/something'; req.HttpVerb := 'POST'; req.ContentType := 'application/x-www-form-urlencoded'; req.Charset := 'utf-8'; success := http.HttpSReq('www.chilkatsoft.com',443,1,req.ControlInterface,resp.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; // This is the request that is sent: // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6) // POST /something HTTP/1.1 // Host: www.chilkatsoft.com // Content-Type: application/x-www-form-urlencoded // Content-Length: 15 // // name=M%C3%A6RSK // --------------------------------------------------------------- // Let's do a PostXml where the query params are in the HTTP request start line, // and the Content-Type is text/xml where the body of the request is XML. req.Path := '/something'; req.HttpVerb := 'POST'; req.ContentType := 'text/xml'; success := req.LoadBodyFromString('<test>123</test>','utf-8'); req.Charset := 'utf-8'; // Remember... our request object still contains the query param added in the above call to AddParam.new HttpResponse resp; success := http.HttpSReq('www.chilkatsoft.com',443,1,req.ControlInterface,resp.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; // This is the request that is sent: // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6) // POST /something?name=M%C3%A6RSK HTTP/1.1 // Host: www.chilkatsoft.com // Content-Type: text/xml // Content-Length: 16 // // <test>123</test> end; |
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