(Go) 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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    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.

    gAuth := chilkat.NewAuthGoogle()
    gAuth.SetAccessToken("GOOGLE-DRIVE-ACCESS-TOKEN")

    rest := chilkat.NewRest()

    // Connect using TLS.
    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.SetPartSelector("1")
    rest.AddHeader("Content-Type","application/json; charset=UTF-8")

    json := chilkat.NewJsonObject()
    json.AppendString("name","testHello.txt")
    json.AppendString("description","A simple file that says Hello World.")
    json.AppendString("mimeType","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.
    parents := json.AppendArray("parents")
    folderId := "0B53Q6OSTWYolY2tPU1BnYW02T2c"
    parents.AddStringAt(-1,folderId)
    parents.DisposeJsonArray()

    rest.SetMultipartBodyString(*json.Emit())

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

    fileContents := "Hello World!"
    rest.SetMultipartBodyString(fileContents)

    jsonResponse := rest.FullRequestMultipart("POST","/upload/drive/v3/files?uploadType=multipart")
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        json.DisposeJsonObject()
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.ResponseStatusCode() != 200 {
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response JSON: ", *jsonResponse)
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        json.DisposeJsonObject()
        return
    }

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

    // Show the full JSON response.
    json.SetEmitCompact(false)
    fmt.Println(*json.Emit())

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

    // Get the fileId:
    fmt.Println("fileId: ", *json.StringOf("id"))

    gAuth.DisposeAuthGoogle()
    rest.DisposeRest()
    json.DisposeJsonObject()