(C) OneDrive -- Download Text File to Memory

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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_CkJsonObject.h>
#include <C_CkHttp.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkJsonObject json;
    HCkHttp http;
    HCkStringBuilder sbXml;
    const char *expectedCharset;
    const char *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 = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"client_id","2871da2c-8176-4b7f-869b-2311aa82e743");
    CkJsonObject_UpdateString(json,"client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH");
    CkJsonObject_UpdateString(json,"scope","https://graph.microsoft.com/.default");
    CkJsonObject_UpdateString(json,"token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token");

    http = CkHttp_Create();
    CkHttp_putAuthToken(http,CkJsonObject_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
    CkHttp_putFollowRedirects(http,TRUE);

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

    sbXml = CkStringBuilder_Create();
    expectedCharset = "utf-8";
    url = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content";
    success = CkHttp_DownloadSb(http,url,expectedCharset,sbXml);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    // If the response status code was not 200, then it failed.
    if (CkHttp_getLastStatus(http) != 200) {
        printf("Response Status Code = %d\n",CkHttp_getLastStatus(http));
        printf("Failed.\n");
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

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


    CkJsonObject_Dispose(json);
    CkHttp_Dispose(http);
    CkStringBuilder_Dispose(sbXml);

    }