(Unicode C++) Create a File in a Folder

Creates (uploads) a file to be located in a particular folder.

See Google Drive Files: create for more details.

Also See Google Drive Multipart Upload for more details.

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#include <CkAuthGoogleW.h>
#include <CkRestW.h>
#include <CkJsonObjectW.h>
#include <CkJsonArrayW.h>

void ChilkatSample(void)
    {
    bool success = true;

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

    // This example uses a previously obtained access token having permission for the 
    // Google Drive scope.

    CkAuthGoogleW gAuth;
    gAuth.put_AccessToken(L"GOOGLE-DRIVE-ACCESS-TOKEN");

    CkRestW rest;

    // Connect using TLS.
    bool bAutoReconnect = true;
    success = rest.Connect(L"www.googleapis.com",443,true,bAutoReconnect);

    // Provide the authentication credentials (i.e. the access token)
    rest.SetAuthGoogle(gAuth);

    // -------------------------------------------------------------------------
    // A multipart upload to Google Drive needs a multipart/related Content-Type
    rest.AddHeader(L"Content-Type",L"multipart/related");

    // Specify each part of the request.

    // The 1st part is JSON with information about the file.
    rest.put_PartSelector(L"1");
    rest.AddHeader(L"Content-Type",L"application/json; charset=UTF-8");

    CkJsonObjectW json;
    json.AppendString(L"name",L"testHello.txt");
    json.AppendString(L"description",L"A simple file that says Hello World.");
    json.AppendString(L"mimeType",L"text/plain");

    // To place the file in a folder, we must add a parents[] array to the JSON
    // and list the folder id's.  It's possible for a file to be in multiple folders at once
    // if it has more than one parent.  If no parents are specified, then the file is created
    // in the My Drive folder.  
    // Note: We'll assume we already have the id if the folder.  It is the id's that are specified here,
    // not the folder names.
    CkJsonArrayW *parents = json.AppendArray(L"parents");
    const wchar_t *folderId = L"0B53Q6OSTWYolY2tPU1BnYW02T2c";
    parents->AddStringAt(-1,folderId);
    delete parents;

    rest.SetMultipartBodyString(json.emit());

    // The 2nd part is the file content, which will contain "Hello World!"
    rest.put_PartSelector(L"2");
    rest.AddHeader(L"Content-Type",L"text/plain");

    const wchar_t *fileContents = L"Hello World!";
    rest.SetMultipartBodyString(fileContents);

    const wchar_t *jsonResponse = rest.fullRequestMultipart(L"POST",L"/upload/drive/v3/files?uploadType=multipart");
    if (rest.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response JSON: %s\n",jsonResponse);
        return;
    }

    // Show the JSON response.
    json.Load(jsonResponse);

    // Show the full JSON response.
    json.put_EmitCompact(false);
    wprintf(L"%s\n",json.emit());

    // A successful response looks like this:
    // {
    //   "kind": "drive#file",
    //   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
    //   "name": "Untitled",
    //   "mimeType": "text/plain"
    // }

    // Get the fileId:
    wprintf(L"fileId: %s\n",json.stringOf(L"id"));
    }