Unicode C++

SharePoint List Document Libraries

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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.

Unicode C++

#include <CkJsonObjectW.h>
#include <CkHttpCurlW.h>

void ChilkatSample(void)
    {
    bool 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.
    CkJsonObjectW jsonAuth;

    //  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
    jsonAuth.put_EnableSecrets(true);

    success = jsonAuth.UpdateString(L"oauth2.client_id",L"!!sharepoint|oauth2|client_id");
    if (success == true) {
        success = jsonAuth.UpdateString(L"oauth2.client_secret",L"!!sharepoint|oauth2|client_secret");
    }

    if (success == true) {
        success = jsonAuth.UpdateString(L"oauth2.token_endpoint",L"!!sharepoint|oauth2|token_endpoint");
    }

    if (success == false) {
        wprintf(L"%s\n",jsonAuth.lastErrorText());
        return;
    }

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

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

    CkHttpCurlW curl;

    //  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.
    curl.SetAuth(jsonAuth);

    //  Define variables whose values are already known.
    //  
    //  These variables are referenced in the curl command using
    //  {{variable_name}} substitution syntax.
    curl.SetVar(L"sharepoint_hostname",L"example.sharepoint.com");
    curl.SetVar(L"site_name",L"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.
    curl.AddFunction(L"getSite",L"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.
    curl.AddOutput(L"getSite",L"id",L"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.
    const wchar_t *curlCommand = L"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 = curl.DoYourThing(curlCommand);
    if (success == false) {
        wprintf(L"%s\n",curl.lastErrorText());
        return;
    }

    //  A successful Graph response should return HTTP 200.
    //  Any other status code typically indicates an authentication,
    //  permission, or resource lookup error.
    int statusCode = curl.get_StatusCode();
    if (statusCode != 200) {
        wprintf(L"%s\n",curl.responseBodyStr());
        wprintf(L"status code = %d\n",statusCode);
        return;
    }

    //  The response body contains a JSON array named "value".
    //  Each element of the array describes a SharePoint document library.
    CkJsonObjectW json;
    json.put_EmitCompact(false);
    curl.GetResponseJson(json);
    wprintf(L"%s\n",json.emit());

    //  Iterate over the document libraries returned by Microsoft Graph
    //  and display selected properties for each library.
    int i = 0;
    int numDrives = json.SizeOfArray(L"value");
    while (i < numDrives) {
        json.put_I(i);
        wprintf(L"name: %s\n",json.stringOf(L"value[i].name"));
        wprintf(L"description: %s\n",json.stringOf(L"value[i].description"));
        wprintf(L"id: %s\n",json.stringOf(L"value[i].id"));
        wprintf(L"webUrl: %s\n",json.stringOf(L"value[i].webUrl"));
        wprintf(L"displayName: %s\n",json.stringOf(L"value[i].createdBy.user.displayName"));
        wprintf(L"-\n");
        i = i + 1;
    }

    wprintf(L"Success.\n");
    }