(Delphi DLL) HTTP multipart-mixed POST (for a UPS Package Level Detail PLD Request)

Important: This example requires Chilkat v9.5.0.59 or greater.

Demonstrates how to create a POST for a UPS Package Level Detail PLD Request. The request must be a multipart-mixed request having two sub-parts. The first is a application/x-www-form-urlencoded with name=value URL encoded pairs. The second is a application/x-ups-binary containing a UPS PLD request.

The HTTP request created by this example looks like this:

POST /hapld/tos/kdwhapltos HTTP/1.1
Content-Type: multipart/mixed; boundary=------------050801040202040701030308
Host: domain
Content-Length: 658

--------------050801040202040701030308
Content-type: application/x-www-form-urlencoded
Content-length: 134

AppVersion=1.0&AcceptUPSLicenseAgreement=YES&VersionNumber=V4R1&UserId=myUser&Password=myPassword&ResponseType=application/x-ups-pld

--------------050801040202040701030308
Content-type: application/x-ups-binary
Content-length: 721

020094 2014041500000594196532600 000000001*AAV0Y203 DE 5941965326000001*BA1ZV0Y2036650001829 00001+0000000000000012 +0000000000000000KGS07COL10 3CMEUR000001*CA18TC239 AOK Bahnhofstr. Dresden 01099 DE *EAEVS+000000000000104200EUR*PA1ZV0Y2036650001829 02+0000012 +0000000+00000000+00000000+00000000*SA000005

--------------050801040202040701030308--

The HTTP response (if successful) is multipart MIME as shown below. This example will extract the response content using the Chilkat MIME API.

Content-type: text/html
Content-length: 138

<HTML>
<HEAD>
<TITLE>UPS Internet Software</TITLE>
</HEAD>
<BODY>
<P>UPS Internet Software, Copyright UPS 1998</P>
</BODY>
</HTML>

--BOUNDARY
Content-type: application/x-ups-psmpld
Content-length: 104

UPSOnLine%1.0%0000%0000Successful completion - No errors found.                                    

--BOUNDARY
Content-type: application/x-ups-pld
Content-length: 800

000200000787300000640 KDGPLCR1                   United Parcel Service                      09/06/16  Page:1                    Test PLD Control Report                     05:44 PM                                                                                  ------------------------------------------------------------------------------- Pickup Date:20030813 Sequence#:000005900000002 #of Segments:000000000000000005                                                                                                                                                                  Shipper#:0TEST0     Book/Page#:5900000002 Shipments:000001 Packages:0000000001 10000012900000000Successful completion - No errors found.                                        
!!! Test Upload !!!
File Uploaded: n/a

--BOUNDARY--

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, HttpRequest, Mime, HttpResponse, StringBuilder;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
req: HCkHttpRequest;
paramEncoder: HCkHttpRequest;
urlEncodedParams: PWideChar;
sbParams: HCkStringBuilder;
pld: PWideChar;
http: HCkHttp;
resp: HCkHttpResponse;
mime: HCkMime;
part0: HCkMime;
part1: HCkMime;
part2: HCkMime;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

req := CkHttpRequest_Create();

// The ContentType, HttpVerb, and Path properties should
// always be explicitly set.
CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putPath(req,'/hapld/tos/kdwhapltos');
CkHttpRequest_putContentType(req,'multipart/mixed');

// The 1st body of the multipart/mixed HTTP request will have a content-type of application/x-www-form-urlencoded
// It contains URL encoded parameters.
// We'll use a temporary HTTP request object solely for the purpose of generating our URL encoded parameter string.
paramEncoder := CkHttpRequest_Create();
CkHttpRequest_AddParam(paramEncoder,'AppVersion','1.0');
CkHttpRequest_AddParam(paramEncoder,'AcceptUPSLicenseAgreement','YES');
CkHttpRequest_AddParam(paramEncoder,'VersionNumber','V4R1');
CkHttpRequest_AddParam(paramEncoder,'UserId','UPS_USERID');
CkHttpRequest_AddParam(paramEncoder,'Password','UPS_PASSWORD');
urlEncodedParams := CkHttpRequest__getUrlEncodedParams(paramEncoder);

// The UPS server wants all params to be URL encoded except for the ResponseType param.
// Therefore, we'll add ResponseType unencoded at the end, like this:
sbParams := CkStringBuilder_Create();
CkStringBuilder_Append(sbParams,urlEncodedParams);
CkStringBuilder_Append(sbParams,'&ResponseType=application/x-ups-pld');
// Also, it is very important to include a CRLF at the end.  (This is to satisfy undocumented details
// required by the UPS PLD server.)
CkStringBuilder_Append(sbParams,#13#10);

// Add the params as the 1st sub-part of the multipart/mixed request
CkHttpRequest_AddStringForUpload2(req,'','',CkStringBuilder__getAsString(sbParams),'','application/x-www-form-urlencoded');

// Now for the 2nd part (using some junk data found on the developerkitcommunity.ups.com site.
// Notice the CRLF at the end of the string.  This is important.
pld := '020094                                  2003081300000590000000200   000000001*AA0TEST0    DE                5900000002000001*BA1Z0TEST06800000018                 00001+0000000000000010 +0000000000000000KGS11PRE10                                   3CMEUR000001*CA18                                   United Parcel Service              Goerlitzer Str 1                                                                                         Neuss                              41460    DE                                                        *PA1Z0TEST06800000018                 02+0000010                                                                                      +0000000+00000000+00000000+00000000*SA000004' + #13#10;

CkHttpRequest_AddStringForUpload2(req,'','',pld,'','application/x-ups-binary');

// The UPS PLD server requires Content-Length headers within the MIME sub-parts of the request.
// A new feature of Chilkat v9.5.0.59 is if a Content-Length sub-header is added (with an arbitrary value, such as 0),
// then Chilkat will compute the actual sub-part size and replace the value when the request is sent.
CkHttpRequest_AddSubHeader(req,0,'Content-Length','0');
CkHttpRequest_AddSubHeader(req,1,'Content-Length','0');

// A few important comments about the HTTP request that is generated:
// 
// 1) Chilkat automatically generates a random boundary string.   In 99.999% of cases, this should 
//    be sufficient.
// 2) The top-level Content-Length header is automatically generated based on the actual length of the MIME message
//    that follows the intial (topmost) MIME header.
// 3) The HOST header will automatically get filled in with the actual domain when SynchronousRequest
//    method is called.

// Now send the request...
http := CkHttp_Create();

// If desired (for debugging), provide a flie path for a session log.
// The session log can be sent to support@chilkatsoft.com if the PLD request fails.
CkHttp_putSessionLogFilename(http,'c:/aaworkarea/ups_pld/sessionLog.txt');

// Send the PLD request over TLS..
resp := CkHttp_SynchronousRequest(http,'www.pld-certify.ups.com',443,True,req);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// Load the response MIME.
mime := CkMime_Create();
CkMime_LoadMime(mime,CkHttpResponse__fullMime(resp));

// If it does not have 3 sub-parts, then something is amiss...
if (CkMime_getNumParts(mime) <> 3) then
  begin
    Memo1.Lines.Add('Unexpected number of MIME parts.');
    Memo1.Lines.Add(CkHttpResponse__fullMime(resp));
    Exit;
  end;

// Examine each response part.
part0 := CkMime_GetPart(mime,0);
Memo1.Lines.Add('---- text/html part ----');
Memo1.Lines.Add(CkMime__getBodyDecoded(part0));

part1 := CkMime_GetPart(mime,1);
Memo1.Lines.Add('---- application/x-ups-psmpld part ----');
Memo1.Lines.Add(CkMime__getBodyDecoded(part1));

part2 := CkMime_GetPart(mime,2);
Memo1.Lines.Add('---- application/x-ups-pld part ----');
Memo1.Lines.Add(CkMime__getBodyDecoded(part2));

CkMime_Dispose(part0);
CkMime_Dispose(part1);
CkMime_Dispose(part2);
CkHttpResponse_Dispose(resp);

CkHttpRequest_Dispose(req);
CkHttpRequest_Dispose(paramEncoder);
CkStringBuilder_Dispose(sbParams);
CkHttp_Dispose(http);
CkMime_Dispose(mime);

end;