(MFC) 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 v9.5.0.68 or greater.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;

    // 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.)
    http.put_AuthToken("MICROSOFT_GRAPH_ACCESS_TOKEN");

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

    // Make sure to automatically follow redirects
    http.put_FollowRedirects(true);

    // This example will download /Misc/hamlet.xml
    http.SetUrlVar("item_path","Misc/hamlet.xml");

    CkStringBuilder sbXml;
    const char *expectedCharset = "utf-8";
    const char *url = "https://graph.microsoft.com/v1.0/me/drive/root:/{$item_path}:/content";
    bool success = http.DownloadSb(url,expectedCharset,sbXml);
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // If the response status code was not 200, then it failed.
    if (http.get_LastStatus() != 200) {
        strOut.append("Response Status Code = ");
        strOut.appendInt(http.get_LastStatus());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }