(C++) OneDrive -- Download to File

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Downloads the contents of a DriveItem directly to a file in the local filesystem.

Note: This example requires Chilkat v9.5.0.97 or greater.

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#include <CkJsonObject.h>
#include <CkHttp.h>

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

    // This example uses the OAuth client credentials flow.
    // See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

    // Use your client ID, client secret, and tenant ID in the following lines
    CkJsonObject json;
    json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743");
    json.UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH");
    json.UpdateString("scope","https://graph.microsoft.com/.default");
    json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token");

    CkHttp http;
    http.put_AuthToken(json.emit());

    // Download the file.
    http.SetUrlVar("item_path","Pictures/three_penguins.jpg");
    http.SetUrlVar("user_id","4fe732c3-322e-4a6b-b729-2fd1eb5c6104");
    const char *url = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content";
    const char *localFilePath = "c:/temp/qa_output/three_penguins.jpg";
    bool success = http.Download(url,localFilePath);
    if (success != true) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Successfully downloaded a OneDrive file to the local filesystem." << "\r\n";
    }