Delphi DLL

SharePoint -- Update the Contents of a File (PUT)

Demonstrates how to update the contents of a SharePoint file. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
req: HCkHttpRequest;
bUseTls: Boolean;
resp: HCkHttpResponse;
json: HCkJsonObject;

begin
success := False;

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

http := CkHttp_Create();

// If SharePoint Windows classic authentication is used, then set the 
// Login, Password, LoginDomain, and NtlmAuth properties.
CkHttp_putLogin(http,'SHAREPOINT_USERNAME');
CkHttp_putPassword(http,'SHAREPOINT_PASSWORD');
CkHttp_putLoginDomain(http,'SHAREPOINT_NTLM_DOMAIN');
CkHttp_putNtlmAuth(http,True);

// The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
// If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
// establish the cookie as shown at SharePoint Online Authentication

// Indicate that we want a JSON reply
CkHttp_putAccept(http,'application/json;odata=verbose');

// Update /Documents/ChilkatTest/sample.docx with new content...
req := CkHttpRequest_Create();
CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putPath(req,'/_api/web/GetFileByServerRelativeUrl(''/Documents/ChilkatTest/sample.docx'')/$value');
// Give the location of the file to be uploaded.  
// Note: The file is not loaded into memory at this point.  It is never fully loaded
// into memory.  Instead, the file data is streamed directly from the file when
// when the upload occurs.
CkHttpRequest_StreamBodyFromFile(req,'qa_data/msword/sample.docx');

// We need to add a form digest value in the X-RequestDigest header field.
// See this example for details on
// how to get (and cache) a form digest value
CkHttpRequest_AddHeader(req,'X-RequestDigest','SHAREPOINT_FORM_DIGEST');

// Also need to add this header..
CkHttpRequest_AddHeader(req,'X-HTTP-Method','PUT');

// Upload..
bUseTls := True;
resp := CkHttpResponse_Create();
success := CkHttp_HttpSReq(http,'SHAREPOINT_HTTPS_DOMAIN',443,bUseTls,req,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// A successful update will return a 204 status code with an empty body.
// A non-successful update will return a JSON response body..
if (CkHttpResponse_getStatusCode(resp) <> 204) then
  begin
    Memo1.Lines.Add('Response status code = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
    json := CkJsonObject_Create();
    CkJsonObject_Load(json,CkHttpResponse__bodyStr(resp));
    CkJsonObject_putEmitCompact(json,False);
    Memo1.Lines.Add(CkJsonObject__emit(json));
    Memo1.Lines.Add('Failed');
    Exit;
  end;

Memo1.Lines.Add('Success.');

CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
CkHttpResponse_Dispose(resp);
    CkJsonObject_Dispose(json);

end;