(C++) SharePoint -- Download File (Site Collection)

Demonstrates how to download a file from SharePoint located in the /Documents folder in a site within a site collection.

The format for a URL for a resource contained in a site within a site collection is like this:

https://contoso.com/sites/teamA/_api/web/GetFolderByServerRelativeUrl('/sites/teamA/Documents')/Files('SomeDocument.docx')/$value

Notice that the "/sites/teamA" (where "teamA" is the name of the site) occurs twice in the URL.

For more information, see https://docs.microsoft.com/en-us/sharepoint/sites/sites-and-site-collections-overview

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#include <CkHttp.h>

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

    // -------------------------------------------------------------------------
    // The following comments apply to SharePoint Windows classic authentication.
    // -------------------------------------------------------------------------
    // For example, imagine our SharePoint endpoint is https://xyzoffice.mycompany.com/
    // The SHAREPOINT_NTLM_DOMAIN would be "mycompany.com"
    // The SHAREPOINT_HTTPS_DOMAIN would be "xyzoffice.mycompany.com"
    // Also, the SHAREPOINT_USERNAME would be just the name, not a full email address.
    // for example, "chilkat" instead of "chilkat@mycompany.com"

    CkHttp http;

    // If SharePoint Windows classic authentication is used, then set the 
    // Login, Password, LoginDomain, and NtlmAuth properties.
    http.put_Login("SHAREPOINT_USERNAME");
    http.put_Password("SHAREPOINT_PASSWORD");
    http.put_LoginDomain("SHAREPOINT_NTLM_DOMAIN");
    http.put_NtlmAuth(true);

    // -------------------------------------------------------------------------
    // The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
    // If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
    // establish the cookie as shown at SharePoint Online Authentication
    // -------------------------------------------------------------------------

    // This example downloads the file named "Domain Name created for Exchange.docx"

    // Note: I was initially confused by the "$value" part of the URL. 
    // When I see something like $value, I immediately think that it's some sort of
    // variable or placeholder to be replaced with an actual value.  In this case,
    // the "$value" is literally part of the URL.  It's not replace with anything.

    // --------------------------------------------------------------------------------
    // IMPORTANT: The format for a URL within a site collection is like this:
    // https://SHAREPOINT_HTTPS_DOMAIN/sites/teamA/_api/web/GetFolderByServerRelativeUrl('/sites/teamA/Documents')/Files('Domain Name created for Exchange.docx')/$value
    // 
    // Notice that "/sites/teamA" is specified twice in the above sample URL.
    // --------------------------------------------------------------------------------

    const char *url = "https://SHAREPOINT_HTTPS_DOMAIN/sites/teamA/_api/web/GetFolderByServerRelativeUrl('/sites/teamA/Documents')/Files('Domain Name created for Exchange.docx')/$value";
    const char *localFilePath = "qa_output/x.docx";

    bool success = http.Download(url,localFilePath);
    if (success != true) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "File successfully downloaded from a SharePoint site within a site collection." << "\r\n";
    }