(Unicode C) OneDrive -- Download Text File to Memory

Downloads a text file (such as XML, JSON, plain-text, HTML, etc.) into a StringBuilder object.

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

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#include <C_CkJsonObjectW.h>
#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    HCkJsonObjectW json;
    HCkHttpW http;
    HCkStringBuilderW sbXml;
    const wchar_t *expectedCharset;
    const wchar_t *url;
    BOOL success;

    // 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
    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"client_id",L"2871da2c-8176-4b7f-869b-2311aa82e743");
    CkJsonObjectW_UpdateString(json,L"client_secret",L"2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH");
    CkJsonObjectW_UpdateString(json,L"scope",L"https://graph.microsoft.com/.default");
    CkJsonObjectW_UpdateString(json,L"token_endpoint",L"https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token");

    http = CkHttpW_Create();
    CkHttpW_putAuthToken(http,CkJsonObjectW_emit(json));

    // Sends the following GET request:
    // GET https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{item-path}:/content

    // Make sure to automatically follow redirects
    CkHttpW_putFollowRedirects(http,TRUE);

    // This example will download /Misc/hamlet.xml
    CkHttpW_SetUrlVar(http,L"item_path",L"Misc/hamlet.xml");
    CkHttpW_SetUrlVar(http,L"user_id",L"4fe732c3-322e-4a6b-b729-2fd1eb5c6104");

    sbXml = CkStringBuilderW_Create();
    expectedCharset = L"utf-8";
    url = L"https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content";
    success = CkHttpW_DownloadSb(http,url,expectedCharset,sbXml);
    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkJsonObjectW_Dispose(json);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

    // If the response status code was not 200, then it failed.
    if (CkHttpW_getLastStatus(http) != 200) {
        wprintf(L"Response Status Code = %d\n",CkHttpW_getLastStatus(http));
        wprintf(L"Failed.\n");
        CkJsonObjectW_Dispose(json);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

    // If we got here, then the file was successfully downloaded.
    wprintf(L"Download from OneDrive successful.\n");
    wprintf(L"The file is contained in sbXml.\n");


    CkJsonObjectW_Dispose(json);
    CkHttpW_Dispose(http);
    CkStringBuilderW_Dispose(sbXml);

    }