(C++) Upload Application Specific Data

Uploads a text file (application specific data) where the contents of the file are contained in a string variable.

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#include <CkJsonObject.h>
#include <CkAuthGoogle.h>
#include <CkRest.h>

void ChilkatSample(void)
    {
    bool success = true;

    // It 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 application specific data scope.
    CkJsonObject jsonToken;
    success = jsonToken.LoadFile("qa_data/tokens/googleDriveAppData.json");

    CkAuthGoogle gAuth;
    gAuth.put_AccessToken(jsonToken.stringOf("access_token"));

    CkRest rest;

    // Connect using TLS.
    bool bAutoReconnect = true;
    success = rest.Connect("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("Content-Type","multipart/related");

    // Specify each part of the request.

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

    CkJsonObject json;
    json.put_EmitCompact(false);

    json.UpdateString("name","helloWorld.txt");
    json.UpdateString("description","A simple text file that says Hello World.");
    json.UpdateString("mimeType","text/plain");
    // Specifiy the application-specific data folder.
    json.UpdateString("parents[0]","appDataFolder");
    rest.SetMultipartBodyString(json.emit());

    std::cout << json.emit() << "\r\n";

    // The JSON looks like this:
    // {
    //   "name": "helloWorld.txt",
    //   "description": "A simple text file that says Hello World.",
    //   "mimeType": "text/plain",
    //   "parents": [
    //     "appDataFolder"
    //   ]
    // }

    // The 2nd part is the file content.
    // In this case, we'll upload a simple text file containing "Hello World!"
    rest.put_PartSelector("2");
    rest.AddHeader("Content-Type","text/plain");

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

    const char *jsonResponse = rest.fullRequestMultipart("POST","/upload/drive/v3/files?uploadType=multipart");
    if (rest.get_LastMethodSuccess() != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response JSON: " << jsonResponse << "\r\n";
        return;
    }

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

    // Show the full JSON response.
    json.put_EmitCompact(false);
    std::cout << json.emit() << "\r\n";

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

    // Get the fileId:
    std::cout << "fileId: " << json.stringOf("id") << "\r\n";
    }