(Delphi DLL) SharePoint List Document Libraries

See more SharePoint Examples

This example shows how to use Chilkat's HttpCurl class to list the document libraries in a SharePoint site. In Microsoft Graph, SharePoint document libraries are represented as drives. The example demonstrates how HttpCurl can automatically resolve a SharePoint site name to its Microsoft Graph site ID, then use that ID to retrieve and display the site's document libraries.

Note: This example requires Chilkat v11.5.0 or greater.

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, JsonObject, HttpCurl;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
jsonAuth: HCkJsonObject;
curl: HCkHttpCurl;
curlCommand: PWideChar;
statusCode: Integer;
json: HCkJsonObject;
i: Integer;
numDrives: Integer;

begin
success := False;

// This example retrieves the document libraries for a SharePoint site.
// 
// In Microsoft Graph terminology, a document library is represented as a "drive".
// The example demonstrates how HttpCurl can automatically resolve a SharePoint
// site name to a site ID before requesting the site's document libraries.

success := False;

// --------------------------------------------------------------------------------------------------------
// Before running this example, create an Azure App Registration and grant it
// the Microsoft Graph permissions required to access SharePoint.
// 
// The application will authenticate using OAuth2 Client Credentials.
// See:
// How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
// --------------------------------------------------------------------------------------------------------

// Build a JSON authentication configuration.
// HttpCurl will use this information to automatically obtain OAuth2 access tokens.
jsonAuth := CkJsonObject_Create();

// Enable secret lookup.
// 
// Instead of hard-coding sensitive values such as the client ID,
// client secret, and token endpoint, secret specification strings
// are used.  Chilkat automatically retrieves the actual values from
// Windows Credential Manager (Windows) or Apple Keychain (macOS).
// 
// See:
// Secret Specification Strings
CkJsonObject_putEnableSecrets(jsonAuth,True);

success := CkJsonObject_UpdateString(jsonAuth,'oauth2.client_id','!!sharepoint|oauth2|client_id');
if (success = True) then
  begin
    success := CkJsonObject_UpdateString(jsonAuth,'oauth2.client_secret','!!sharepoint|oauth2|client_secret');
  end;
if (success = True) then
  begin
    success := CkJsonObject_UpdateString(jsonAuth,'oauth2.token_endpoint','!!sharepoint|oauth2|token_endpoint');
  end;
if (success = False) then
  begin
    Memo1.Lines.Add(CkJsonObject__lastErrorText(jsonAuth));
    Exit;
  end;

// Request Microsoft Graph permissions that were granted to the application.
CkJsonObject_UpdateString(jsonAuth,'oauth2.scope','https://graph.microsoft.com/.default');

// ---------------------------------------------------------------------------------------------------

curl := CkHttpCurl_Create();

// Associate the OAuth2 configuration with HttpCurl.
// 
// When the request is executed, Chilkat automatically obtains an access token
// if needed and adds the Authorization: Bearer header to the HTTP request.
CkHttpCurl_SetAuth(curl,jsonAuth);

// Define variables whose values are already known.
// 
// These variables are referenced in the curl command using
// {{variable_name}} substitution syntax.
CkHttpCurl_SetVar(curl,'sharepoint_hostname','example.sharepoint.com');
CkHttpCurl_SetVar(curl,'site_name','test');

// The document libraries endpoint requires a Microsoft Graph site ID.
// 
// Because the application only knows the SharePoint site name,
// HttpCurl must first retrieve the corresponding site ID.
// 
// Define a function that can resolve the site_id variable when needed.
// HttpCurl may execute this function automatically if it determines that
// site_id is required by another request.
CkHttpCurl_AddFunction(curl,'getSite','GET https://graph.microsoft.com/v1.0/sites/root:/sites/{{site_name}}');

// Extract the "id" field from the getSite response and store it
// in the HttpCurl variable named "site_id".
// 
// Any later request that references {{site_id}} can use this value.
CkHttpCurl_AddOutput(curl,'getSite','id','site_id');

// The target Microsoft Graph request:
// 
// curl -X GET \"https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives
// 
// This request returns the document libraries belonging to the site.
// 
// Microsoft Graph refers to document libraries as "drives",
// so each object in the response represents one document library.
// 
// No Authorization header is included because HttpCurl automatically
// adds it when OAuth2 authentication is configured.
curlCommand := 'curl -X GET "https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives"';

// Execute the request.
// 
// HttpCurl examines the target curl command and determines that
// the variable {{site_id}} is required.
// 
// Because site_id is not yet known, HttpCurl searches for a function
// capable of producing it.  The getSite function provides the "id"
// output, which is mapped to the site_id variable.
// 
// The execution plan becomes:
// 
//   1) Execute getSite to obtain site_id.
//   2) Substitute {{site_id}} into the target request.
//   3) Execute the drives request.
// 
// The final HTTP response returned by DoYourThing is always the
// response from the target curl command, which is the last step in the plan.
success := CkHttpCurl_DoYourThing(curl,curlCommand);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttpCurl__lastErrorText(curl));
    Exit;
  end;

// A successful Graph response should return HTTP 200.
// Any other status code typically indicates an authentication,
// permission, or resource lookup error.
statusCode := CkHttpCurl_getStatusCode(curl);
if (statusCode <> 200) then
  begin
    Memo1.Lines.Add(CkHttpCurl__responseBodyStr(curl));
    Memo1.Lines.Add('status code = ' + IntToStr(statusCode));
    Exit;
  end;

// The response body contains a JSON array named "value".
// Each element of the array describes a SharePoint document library.
json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);
CkHttpCurl_GetResponseJson(curl,json);
Memo1.Lines.Add(CkJsonObject__emit(json));

// Iterate over the document libraries returned by Microsoft Graph
// and display selected properties for each library.
i := 0;
numDrives := CkJsonObject_SizeOfArray(json,'value');
while i < numDrives do
  begin
    CkJsonObject_putI(json,i);
    Memo1.Lines.Add('name: ' + CkJsonObject__stringOf(json,'value[i].name'));
    Memo1.Lines.Add('description: ' + CkJsonObject__stringOf(json,'value[i].description'));
    Memo1.Lines.Add('id: ' + CkJsonObject__stringOf(json,'value[i].id'));
    Memo1.Lines.Add('webUrl: ' + CkJsonObject__stringOf(json,'value[i].webUrl'));
    Memo1.Lines.Add('displayName: ' + CkJsonObject__stringOf(json,'value[i].createdBy.user.displayName'));
    Memo1.Lines.Add('-');
    i := i + 1;
  end;

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

CkJsonObject_Dispose(jsonAuth);
CkHttpCurl_Dispose(curl);
CkJsonObject_Dispose(json);

end;