(C# UWP/WinRT) Upload Binary File from Memory

This example demonstrates how to upload a binary file from memory. It uploads the file to a subdirectory of our choosing.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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.

Chilkat.AuthGoogle gAuth = new Chilkat.AuthGoogle();
gAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN";

Chilkat.Rest rest = new Chilkat.Rest();

// Connect using TLS.
bool bAutoReconnect = true;
success = await rest.ConnectAsync("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.PartSelector = "1";
rest.AddHeader("Content-Type","application/json; charset=UTF-8");

// Construct the JSON that will contain the metadata about the file data to be uploaded...
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.AppendString("name","hedgehogs.jpg");
json.AppendString("description","A cute photo of two hedgehogs.");
json.AppendString("mimeType","image/jpeg");

// To place the file in a folder, we must add a parents[] array to the JSON
// and add the folder ID.  
// In a previous example (see Build Local Metadata Cache
// we built a local cache to make it easy to lookup file IDs given a file path.
// Let's find the file ID for the folder "testFolder/abc/123"
Chilkat.Cache gdCache = new Chilkat.Cache();
gdCache.Level = 0;
gdCache.AddRoot("C:/ckCache/googleDrive");

string folderId = gdCache.FetchText("testFolder/abc/123");
if (gdCache.LastMethodSuccess != true) {
    Debug.WriteLine("Filepath not found in cache.");
    return;
}

Chilkat.JsonArray parents = json.AppendArray("parents");
parents.AddStringAt(-1,folderId);

rest.SetMultipartBodyString(json.Emit());

// The 2nd part is the file content, which will contain the binary image data.
rest.PartSelector = "2";
rest.AddHeader("Content-Type","image/jpeg");

Chilkat.FileAccess fac = new Chilkat.FileAccess();
byte[] jpgBytes = null;
// Read a JPG file from the local filesystem.
jpgBytes = fac.ReadEntireFile("qa_data/jpg/hedgehogs.jpg");

// Add the bytes to our upload
rest.SetMultipartBodyBinary(jpgBytes);

string jsonResponse = await rest.FullRequestMultipartAsync("POST","/upload/drive/v3/files?uploadType=multipart");
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// A successful response will have a status code equal to 200.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine("response status code = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("response status text = " + rest.ResponseStatusText);
    Debug.WriteLine("response header: " + rest.ResponseHeader);
    Debug.WriteLine("response JSON: " + jsonResponse);
    return;
}

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

// Show the full JSON response.
json.EmitCompact = false;
Debug.WriteLine(json.Emit());

// A successful response looks like this:
// {
//   "kind": "drive#file",
//   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
//   "name": "hedgehogs.jpg",
//   "mimeType": "image/jpeg"
// }

// Get the fileId:
Debug.WriteLine("fileId: " + json.StringOf("id"));