(JavaScript) Google Drive - Resumable Upload

Demonstrates how to do a resumable upload to Google Drive.

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://developers.google.com/drive/api/v3/manage-uploads#resumable

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

success = true;

// This example uses a previously obtained access token having permission for the 
// Google Drive scope. 
// See Get Google Drive OAuth2 Access Token

var http = new CkHttp();

http.AuthToken = "GOOGLE_DRIVE_ACCESS_TOKEN";

// First we want to initiate the resumable upload.
// We send a POST to get a session URI, which will be used to upload the file, and resume if needed.

// Our POST will look like this:

// POST https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable HTTP/1.1
// Authorization: Bearer [YOUR_AUTH_TOKEN]          <-- Chilkat automatically adds this header because the AuthToken property was set.
// Content-Length: 38                               <-- Chilkat will automatically add this header.
// Content-Type: application/json; charset=UTF-8    <-- This is the type of this POST, and is specified in the call to HttpJson.
// X-Upload-Content-Type: application/zip           <-- The type of file we'll be uploading
// X-Upload-Content-Length: 1366807                 <-- The size of the file we'll be uploading
// 
// {
//   "name": "myObject"
// }

http.SetRequestHeader("X-Upload-Content-Type","application/zip");
http.SetRequestHeader("X-Upload-Content-Length","1366807");

var json = new CkJsonObject();
json.UpdateString("name","myZip");

var resp = new CkHttpResponse();
success = http.HttpJson("POST","https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable",json,"application/json",resp);
if (success == false) {
    console.log(http.LastErrorText);
    return;
}

var statusCode = resp.StatusCode;
if (statusCode !== 200) {
    console.log(resp.BodyStr);
    console.log("response status = " + statusCode);
    return;
}

// The session URI is in the "Location" response header:
var sbSessionUri = new CkStringBuilder();
sbSessionUri.Append(resp.GetHeaderField("Location"));
var sessionUri = sbSessionUri.GetAsString();
console.log("Session URI: " + sessionUri);

// Here's a sample session URI:  https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&upload_id=AEnB2UrszR8lDqlo3mtXJw_0rYI_Hi1oVh1NPFcLfoyBq9NcSjk85kFopoZaVEgT38OSmLl0XsObPf4iCSJwHlrOvvIJQ_ckIQ

// -----------------------------------------------------------------------------
// The next step is to upload the file using the session URI:

// We'll send a PUT that looks like this:

// PUT https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&upload_id=xa298sd_sdlkj2 HTTP/1.1
// Content-Length: 1366807
// Content-Type: application/zip
// 
// [BYTES 0-1366806]

// First remove the X-Upload-Content-Type and X-Upload-Content-Length request headers we specified earlier, so they don't get sent with subsequent requests.
http.ClearHeaders();

// Because the file is likely large, we'll use HttpSReq which allows to to pass an HTTP request object where the body can be streamed directly from a file.
var req = new CkHttpRequest();

req.ContentType = "application/zip";
req.HttpVerb = "PUT";

var url = new CkUrl();
url.ParseUrl(sessionUri);

req.Path = url.PathWithQueryParams;
console.log("Path with Query Param: " + url.PathWithQueryParams);

// Specify that the request body is to be streamed directly from a file.
success = req.StreamBodyFromFile("qa_data/zips/big.zip");
if (success == false) {
    console.log(req.LastErrorText);
    return;
}

success = http.HttpSReq(url.Host,url.Port,url.Ssl,req,resp);
if (success == false) {
    console.log(http.LastErrorText);
    return;
}

console.log(resp.BodyStr);
console.log("response status = " + resp.StatusCode);

// Sample output:

// {
//  "kind": "drive#file",
//  "id": "1rx20i53eurtkVQ-RT7Ry8Ct85PgPYMET",
//  "name": "myZip",
//  "mimeType": "application/zip"
// }
// 
// response status = 200