Swift Requires Chilkat v11.0.0+

Google Drive - Resumable Upload

See more Google Drive Examples

Demonstrates how to do a resumable upload to Google Drive. Swift

func chilkatTest() {
    var success: Bool = 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

    let http = CkoHttp()!

    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(name: "X-Upload-Content-Type", value: "application/zip")
    http.setRequestHeader(name: "X-Upload-Content-Length", value: "1366807")

    let json = CkoJsonObject()!
    json.updateString(jsonPath: "name", value: "myZip")

    let resp = CkoHttpResponse()!
    success = http.httpJson(verb: "POST", url: "https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable", json: json, contentType: "application/json", response: resp)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    var statusCode: Int = resp.statusCode.intValue
    if statusCode != 200 {
        print("\(resp.bodyStr!)")
        print("response status = \(statusCode)")
        return
    }

    //  The session URI is in the "Location" response header:
    let sbSessionUri = CkoStringBuilder()!
    sbSessionUri.append(value: resp.getHeaderField(fieldName: "Location"))
    var sessionUri: String? = sbSessionUri.getAsString()
    print("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.
    let req = CkoHttpRequest()!

    req.contentType = "application/zip"
    req.httpVerb = "PUT"

    let url = CkoUrl()!
    url.parse(url: sessionUri)

    req.path = url.pathWithQueryParams
    print("Path with Query Param: \(url.pathWithQueryParams!)")

    //  Specify that the request body is to be streamed directly from a file.
    success = req.streamBody(fromFile: "qa_data/zips/big.zip")
    if success == false {
        print("\(req.lastErrorText!)")
        return
    }

    success = http.httpSReq(domain: url.host, port: url.port.intValue, ssl: url.ssl, request: req, response: resp)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    print("\(resp.bodyStr!)")
    print("response status = \(resp.statusCode.intValue)")

    //  Sample output:

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

}