I am new to ActionScript 3. I am attempting to call the server from the client using the nc.call() method to see if this was a good option to use for clients to communicate back and forth in a chat application.
I received a compile error message:
1118: Implicit coercion of a value with static type Object to a possibly unrelated type flash.net:Responder.
Can somebody please help me fix this error?
This is my client-side code below:
import flash.net.NetConnection;
import flash.events.NetStatusEvent;
var nc:NetConnection = new NetConnection();
nc.connect("rtmfp:/fms/textchatexample");
nc.addEventListener(NetStatusEvent.NET_STATUS, netHandler);
function netHandler(event:NetStatusEvent):void {
switch(event.info.code) {
case "NetConnection.Connect.Success":
trace("Your Connected UP");
break;
}
}
var test:Object = new Object();
test.onResult = function(arg) {
trace(arg);
};
nc.call("sendMsg", test, "just, a test call"); ERROR LINE
try to replace your Object instance with a Responder:
var test:Responder = new Responder(
function(result):void
{
trace('ok :', result);
},
function(status):void
{
trace('status :', status);
});
instead of your Object
Related
I'm trying to use Firebase and its callable Cloud Functions for my Unity project.
With the docs and different posts I found on the web I struggle to understand how returning data works. (I come from Azure Functions in C#)
I use TypeScript, and try to return a custom object CharactersResponse:
export class CharactersResponse //extends CustomResponse
{
Code!: CharactersCode;
CharacterID?: string;
}
export enum CharactersCode
{
Success = 0,
InvalidName = 2000,
CharacterNameAlreadyExists = 2009,
NoCharacterSlotAvailable = 3000,
InvalidCharacterClass = 4000,
EmptyResponse = 9000,
UnknownError = 9999,
}
(Custom Response is a parent class with only an UnknownErrorMessage string property, that I use for adding extra message when needed, but only in Unity. I don't need it in my functions.)
I have the same in my C# Unity Project:
public class CharactersResponse : CustomResponse
{
public CharactersCode Code;
public string CharacterID;
}
public enum CharactersCode
{
Success = 0,
InvalidName = 2000,
CharacterNameAlreadyExists = 2009,
NoCharacterSlotAvailable = 3000,
InvalidCharacterClass = 4000,
EmptyResponse = 9000,
UnknownError = 9999,
}
I'm still learning but I found it useful to do this way for displaying correct messages in Unity (and also regarding localization).
When the Code is 0 (Success), I will usually need to get some data at the same time like in this example CharacterID, or CharacterLevel, CharacterName etc.. CharacterResponse will be used for all functions regarding Characters like "GetAllCharacters", "CreateNewCharacter" etc..
My Function (CreateNewCharacter) looks like this:
import * as functions from "firebase-functions";
import { initializeApp } from "firebase-admin/app";
import { getFirestore } from "firebase-admin/firestore";
import { CharactersResponse } from "./CharactersResponse";
import { CharactersCode } from "./CharactersResponse";
import { StringUtils } from "../Utils/StringUtils";
// DATABASE INITIALIZATION
initializeApp();
const db = getFirestore();
// CREATE NEW CHARACTER
export const CreateNewCharacter =
functions.https.onCall((data, context) =>
{
// Checking that the user is authenticated.
if (!context.auth)
{
// Throwing an HttpsError so that the client gets the error details.
throw new functions.https.HttpsError('failed-precondition', 'The function must be called ' +
'while authenticated.');
}
// TEST
data.text = '';
// Authentication / user information is automatically added to the request.
const uid: string = context?.auth?.uid;
const characterName: string = data.text;
// Check if UserID is present
if (StringUtils.isNullOrEmpty(uid))
{
// Throwing an HttpsError so that the client gets the error details.
throw new functions.https.HttpsError('failed-precondition', 'Missing UserID in Auth Context.');
}
const response = new CharactersResponse();
if (StringUtils.isNullOrEmpty(characterName))
{
response.Code = CharactersCode.InvalidName;
console.log("character name null or empty return");
return response; // PROBLEM IS HERE *****************
}
console.log("end return");
return "Character created is named : " + characterName + ". UID = " + uid;
});
In Unity, the function call looks like this:
private static FirebaseFunctions functions = FirebaseManager.Instance.Func;
public static void CreateNewCharacter(string text, Action<CharactersResponse> successCallback, Action<CharactersResponse> failureCallback)
{
Debug.Log("Preparing Function");
// Create the arguments to the callable function.
var data = new Dictionary<string, object>();
data["text"] = text;
// Call the function and extract the operation from the result.
HttpsCallableReference function = functions.GetHttpsCallable("CreateNewCharacter");
function.CallAsync(data).ContinueWithOnMainThread((task) =>
{
if (task.IsFaulted)
{
foreach(var inner in task.Exception.InnerExceptions)
{
if (inner is FunctionsException)
{
var e = (FunctionsException)inner;
// Function error code, will be INTERNAL if the failure
// was not handled properly in the function call.
var code = e.ErrorCode;
var message = e.Message;
Debug.LogError($"Code: {code} // Message: {message}");
if (failureCallback != null)
{
failureCallback.Invoke(new CharactersResponse()
{
Code = CharacterCode.UnknownError,
UnknownErrorMessage = $"ERROR: {code} : {message?.ToString()}"
});
}
}
}
}
else
{
Debug.Log("About to Deserialize response");
// PROBLEM IS HERE *********************
CharactersResponse response = JsonConvert.DeserializeObject<CharactersResponse>(task.Result.Data.ToString());
Debug.Log("Deserialized response");
if (response == null)
{
Debug.LogError("Response is NULL");
}
else
{
Debug.Log("ELSE");
Debug.Log($"Response: {response}");
Debug.Log(response.Code.ToString());
}
}
});
}
The problem :
In my Unity C# code, task.Result.Data contains the CharactersCode I've set in my function, but I can't find a way to convert it to CharactersResponse. (It worked in Azure Functions). Moreover, the line just after Deserialization Debug.Log("Deserialized response"); is not executed. The code seems stuck in the deserialization process.
I tried with and without extending my TypeScript class with CustomResponse(because I don't need it in my Function so I didn't extended it at first).
I also tried setting a CharacterID because I thought maybe it didn't like the fact that this property was missing but the result is the same.
I don't understand what is the problem here? If any of you can help.
Thanks.
HttpsCallableResult.Data is of type object!
=> Your ToString will simply return the type name something like
System.Object
or in your case the result is a dictionary so it prints out that type.
=> This is of course no valid JSON content and not what you expected.
Simply construct the result yourself from the data:
var result = (Dictionary<string, object>)task.Result.Data;
CharactersResponse response = new CharactersResponse
{
Code = (CharactersCode)(int)result["Code"],
CharacterID = (string)result["CharacterID"];
};
I wanted to implement derHugo's solution but couldn't find a way to convert task.Result.Data to Dictionary<string, object>.
The code was stuck at var result = (Dictionary<string, object>)task.Result.Data; even in step by step debugging and no error popped up.
OLD SOLUTION:
So I did a little research and stumbled upon this post and ended up using this instead :
var json = JsonConvert.SerializeObject(task.Result.Data);
CharactersResponse response = JsonConvert.DeserializeObject<CharactersResponse>(json);
I basically convert the task.Result.Data to JSON and convert it back to CharactersResponse and it works. I have what I wanted.
However, I seem to understand that it is not the best solution performance-wise, but for now it is okay and I can now move forward in the project, I'll try to find a better solution later.
NEW SOLUTION:
I wanted to try one last thing, out of curiosity. I wondered what if I convert to JSON at the beginning (in my function) instead of at the end (in my Unity app). So I did this in my function's TypeScript code:
response.Code = CharactersCode.InvalidName;
var r = JSON.stringify(response); // Added this line
return r; // return 'r' instead of 'response'
In my C# code, I retried this line of code:
CharactersResponse response = JsonConvert.DeserializeObject<CharactersResponse>(task.Result.Data.ToString());
And it works ! I just needed to convert my object to JSON in my function before returning it. It allows me to "save" one line of code to process on the client side compared to the old solution.
Thanks derHugo for your answer as it helped me finding what I want.
I have created a url scraper function, working and tested on Google Cloud, but I am really drawing a blank on how to invoke it. I have tried two methods, one using the cloud_functions package, and the other using a standard HTTPS get. I've tried looking online, but none of the solutions/guides involve functions with an input from the Flutter app, and an output back to the app.
Here's the structure of the function (which is working alright). I've named this function Parse in Google Cloud Platform.
<PYTHON PACKAGE IMPORTS>
def Parser(url):
<URL PARSE FUNCTIONS>
return source, datetime, imageurl, keyword
def invoke_parse(request):
request_json = request.get_json(silent=True)
file = Parser(request_json['url'])
return jsonify({
"source": file[0],
"datetime": file[1],
"imageurl": file[2],
"keyword": file[3],
})
The first method I tried was using an HTTP CALL to get the function. But that isn't working, even though there are no errors - I suspect it's just returning nothing.
parser(String url) async{ // Here I honestly don't know where to use the url input within the function
var uri = Uri.parse(<Function URL String>);
HttpClient client;
try {
var request = await client.getUrl(uri);
var response = await request.close();
if (response.statusCode == HttpStatus.ok) {
var json = await response.transform(utf8.decoder).join();
Map data = jsonDecode(json) as Map;
source = data['source']; // These are the variables used in the main Flutter app
postedAt = data['datetime'];
_imageUrl = data['image'];
keyword = data['keyword'];
} else {
print('Error running parse:\nHttp status ${response.statusCode}');
}
} catch (exception) {
print('Failed invoking the parse function.');
}
}
That didn't work, so I thought I might alternatively use the cloud_functions package as follows (in lieu of the previous):
parser(String url) async {
var functionUrl = <FUNCTION URL>;
HttpsCallable callable = CloudFunctions.instance.getHttpsCallable(functionName: 'Parse')
..timeout = const Duration(seconds: 30);
try {
final HttpsCallableResult result = await callable.call(
<String, dynamic>{
'url': url,
}
);
setState(() {
source = result.data['source']; //THESE ARE VARIABLES USED IN THE FLUTTER APP
postedAt = result.data['datetime'];
_imageUrl = result.data['image'];
keyword = result.data['keyword'];
});
}
on CloudFunctionsException catch (e) {
print('caught firebase functions exception');
print(e.code);
print(e.message);
print(e.details);
} catch (e) {
print('caught generic exception');
print(e);
}
}
In the latter case, the code ran without errors but doesn't work. My flutter log states the following error:
I/flutter ( 2821): caught generic exception
I/flutter ( 2821): PlatformException(functionsError, Cloud function failed with exception., {code: NOT_FOUND, details: null, message: NOT_FOUND})
which I'm assuming is also an error at not being able to read the function.
Any help on how I should go about processing my function would be appreciated. Apologies if something is a really obvious solution, but I am not familiar as much with HTTP requests and cloud platforms.
Thanks and cheers.
Node Js Backend Function
const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();
exports.test = functions.https.onCall(async (data, context) => {
functions.logger.info("Hello logs: ", {structuredData: true});
functions.logger.info( data.token, {structuredData: true});
}
Flutter frontend
1- pubspec.yaml
cloud_functions: ^1.1.2
2 - Code
HttpsCallable callable = FirebaseFunctions.instance.httpsCallable('test');
final HttpsCallableResult results = await callable.call<Map>( {
'token': token,
});
I'm trying to post some data from a dart project to another and store them in a mongoDB
Post code:
import 'dart:io';
void main() {
List example = [
{"source": "today", "target": "tomorrow"},
{"source": "yesterday", "target": "tomorrow"},
{"source": "today", "target": "yesterday"}
];
new HttpClient().post('localhost', 4040, '')
.then((HttpClientRequest request) {
request.headers.contentType = ContentType.JSON;
request.write(example);
return request.close();
});
}
Code that receives it, inside another file
void start() {
HttpServer.bind(address, port)
.then((HttpServer server) {
// Log in console to show that server is listening
print('Server listening on ${address}:${server.port}');
server.listen((HttpRequest request) {
request.transform(UTF8.decoder).listen(sendToDatastore);
});
});
}
void sendToDatastore(String contents) {
var dbproxy = new dbProxy("myDb");
dbproxy.write("rawdata", contents);
index++;
// non related to the problem code
}
bool write(collectionName, document)
{
Db connection = connect();
DbCollection collection = connection.collection(collectionName);
connection.open().then((_){
print('writing $document to db');
collection.insert(document);
}).then((_) {
print('closing db');
connection.close();
});
return true;
}
What I'm struggling with is that I'm using
request.transform(UTF8.decoder).listen(sendToDatastore);
so I'm converting the request stream to a string as I couldn't find the way to send it as Json.
And then in sendToDatastore I'm not able to parse it properly in order to store it. As far as I understand I'd need to get every Json object as a Map to store it as I'm getting this error
Uncaught Error: type 'String' is not a subtype of type 'Map' of 'document'.
Thanks,
UPDATE
If I try to do something like this in sendToDatastore
void sendToDatastore(String contents) {
var dbproxy = new dbProxy("myDb");
var contentToPass = JSON.decode(contents);
contentToPass.forEach((element) => dbproxy.write("rawdata", element));
index++;
// non related to the problem code
}
It raises this error
Uncaught Error: FormatException: Unexpected character (at character 3)
[{source: today, target: tomorrow}, {source: yesterday, target: tomorrow}, ...
^
In the use of JSON.decode
UPDATE2
The error was that I wasn't sending actual Json from the "post code". I used
// ...
request.write(JSON.encode(example));
// ...
and everything worked fine
Thanks
You should be able to use the dart:convert package.
You can then use:
String str = JSON.encode(obj)
and
var obj = JSON.decode(str)
to convert string/json.
When using URLLoader two types of errors are possible: exceptions which can be catched in try {} block and error events which can be handled by handler functions.
Should I call close() on my URLLoader object after exception/error event occurs?
Interesting question - I gave this code a try and didn't get the error you would expect (stream error):
var urlLoader:URLLoader = new URLLoader();
urlLoader.load( new URLRequest("http://stackoverflow.com/test.jpg") );
urlLoader.addEventListener(IOErrorEvent.IO_ERROR, error);
function error(e:IOErrorEvent):void
{
// Don't get the stream error, meaning the stream is still open.
urlLoader.close();
}
I then thought to myself that maybe it just closes half a second later, so I attached a setTimeout() to the close call. Still didn't get the error.
function error(e:IOErrorEvent):void
{
setTimeout(function()
{
// Still no error.
trace("Test.");
urlLoader.close();
}, 3000);
}
To double check, I ran this to make sure we still actually get that error:
var urlLoader:URLLoader = new URLLoader();
urlLoader.close(); // Error: Error #2029: This URLStream object does not have
// a stream opened.
So, it seems as though you actually do need to .close() a stream if there is an error. How weird. That said, I am still in disbelief, so I welcome any evidence against this.
Not sure where I'm going wrong, for now just trying this out locally. Thanks.
sendingLC.swf does return, LocalConnection.send() succeeded
This is the errors I get from Flash.
Error #2044: Unhandled AsyncErrorEvent:. text=Error #2095: flash.net.LocalConnection was unable to invoke callback myMethod. error=ReferenceError: Error #1069: Property myMethod not found on flash.net.LocalConnection and there is no default value.
Code for sendingLC.swf:
import flash.net.LocalConnection
var sendingLC:LocalConnection;
sendingLC = new LocalConnection();
sendingLC.allowDomain('*');
Security.allowDomain("*");
sendBtn.addEventListener(MouseEvent.CLICK, sendIt);
function sendIt(eventObj:MouseEvent):void {
sendingLC.send('myConnection', 'myMethod');
}
sendingLC.addEventListener(StatusEvent.STATUS, statusHandler);
function statusHandler (event:StatusEvent):void
{
switch (event.level)
{
case "status" :
textArea.text = ("LocalConnection.send() succeeded");
break;
case "error" :
textArea.text = ("LocalConnection.send() failed");
break;
}
}
Code for receivingLC.swf:
import flash.net.LocalConnection
var receivingLC:LocalConnection;
receivingLC = new LocalConnection();
receivingLC.allowDomain('*');
Security.allowDomain("*");
receivingLC.connect('myConnection');
function myMethod():void {trace('Hello World')}
I also had issues with the LocalConnection giving me callback errors, but it stopped when I added the client property to the connection. Then it started working, even in flash IDE.
var conn:LocalConnection;
conn = new LocalConnection();
conn.allowDomain('*');
conn.client = this;
conn.connect('localThingieConnector');
There could be an issue with making the connection in the receiver.
try {
var receivingLC:LocalConnection;
receivingLC = new LocalConnection();
receivingLC.allowDomain('*');
Security.allowDomain("*"); // not sure this line is needed
receivingLC.connect('myConnection');
} catch (error:ArgumentError) {
trace('failure to make connection ' + error.toString() );
}
Also something to note do not test LocalConnections in the flash api do it through a browser when you are first making these as permission issues can be a cranky woman.
Perhaps try making myMethod public like so:
public function myMethod():void{
trace("hello world");
}
Also you should try/catch the send call so you get more information about errors like so:
try{
sendingLC.send('myConnection', 'myMethod');
}
catch(e:Error){
trace(e.toString());
}