(C) OneDrive -- List Large Directory

Demonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children.

Note: This example requires Chilkat v9.5.0.68 or greater.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS/Heroku C/C++ MAC OS X C/C++ C++ Builder	Solaris C/C++ iOS C/C++ Android C/C++ Raspberry Pi C/C++ Windows Mobile 5.0/Pocket PC 2003	ARM Embedded Linux C/C++ PowerLinux C/C++ FreeBSD C/C++ MinGW C/C++

#include <C_CkHttp.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    const char *resp;
    int i;
    int numItems;
    HCkJsonObject json;
    BOOL bGetMore;
    const char *nextLink;

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

    http = CkHttp_Create();

    // Use your previously obtained access token here:
    // See the following examples for getting an access token:
    //    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
    //    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
    //    Refresh Access Token (Azure AD v2.0 Endpoint).
    //    Refresh Access Token (Azure AD Endpoint).

    // (Make sure your token was obtained with the FilesRead or Files.ReadWrite scope.)
    CkHttp_putAuthToken(http,"MICROSOFT_GRAPH_ACCESS_TOKEN");

    // This example will get the DriveItems in /lots-of-files, which has 450 children..
    CkHttp_SetUrlVar(http,"item_path","/lots-of-files");

    json = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(json,FALSE);

    // This loop will download DriveItems in sets of 50 until no more exist.
    bGetMore = TRUE;
    // (Add the $top query parameter to define the page size, i.e. the max number of results to return).
    nextLink = "https://graph.microsoft.com/v1.0/me/drive/root:{$item_path}:/children?$top=50";

    while ((bGetMore == TRUE)) {

        // Get the next chunk of DriveItems
        resp = CkHttp_quickGetStr(http,nextLink);
        if (CkHttp_getLastMethodSuccess(http) != TRUE) {
            printf("%s\n",CkHttp_lastErrorText(http));
            CkHttp_Dispose(http);
            CkJsonObject_Dispose(json);
            return;
        }

        // The response should be JSON.
        CkJsonObject_Load(json,resp);

        // A successful response should return a status code of 200.
        if (CkHttp_getLastStatus(http) != 200) {
            printf("%s\n",CkJsonObject_emit(json));
            printf("Response status = %d\n",CkHttp_getLastStatus(http));
            CkHttp_Dispose(http);
            CkJsonObject_Dispose(json);
            return;
        }

        // Iterate over the DriveItems in the JSON response:
        i = 0;
        numItems = CkJsonObject_SizeOfArray(json,"value");
        while (i < numItems) {
            CkJsonObject_putI(json,i);
            printf("name: %s\n",CkJsonObject_stringOf(json,"value[i].name"));
            i = i + 1;
        }

        // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
        // Otherwise, exit the loop.
        if (CkJsonObject_HasMember(json,"\"@odata.nextLink\"") == TRUE) {
            nextLink = CkJsonObject_stringOf(json,"\"@odata.nextLink\"");
            printf("nextLink: %s\n",nextLink);
        }
        else {
            bGetMore = FALSE;
        }

    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(json);

    }