Develop Reference

Calling Firebase Function from Unity throws error

I am having problems with my Unity3D calling Firebase Functions function. My code is actually copied from https://firebase.google.com/docs/functions/callable.
My function code is following: (just copied this file actually)
https://github.com/firebase/quickstart-js/blob/a579893cfa33121952aeed9069c1554ed4e65b7e/functions/functions/index.js#L44-L50
and in Unity I have this:
//Create the arguments to the callable function.
var data = new Dictionary<string, object>();
data["text"] = "message";
data["push"] = true;
//Call the function and extract the operation from the result.
var function = FirebaseFunctions.DefaultInstance.GetHttpsCallable("addMessage");
function.CallAsync(data).ContinueWith((task) => {
if (task.IsFaulted)
{
foreach (var inner in task.Exception.InnerExceptions)
{
if (inner is FunctionsException)
{
Debug.Log(inner.Message);
}
}
}
else
{
Debug.Log("Finished: " + task.Result.Data);
}
});
But I am getting this result:
Response is not valid JSON object.
What am I doing wrong?
Thank you for your help!!!

I was still working on that problem and suddenly it worked. I dont know why to be honest, because the could looks exactely the same and I did not change anything on that.

Chrome App: Cannot retrieve file load status

My Chrome app has a function that asks for a file to be loaded by another function, checks that the function has set a flag signifying success (External.curFile.lodd), then attempts to process it. My problem is that the flags are not set the first time I call the function, but when I call it a second time the flags are already set.
I had a feeling this has to do with Chrome file functions being asynchronous, so I had the first function idle for a bit while the file loads. The first load never succeeds, no matter how long I wait, but the second load always does!
Calling Function:
function load_by_lines_from_cur_dir( fileName, context ){ // determine the 'meaning' of a file line by line, return last 'meaning', otherwise 'null'
var curLineMeaning = null;
var lastLineValid = true;
External.read_file_in_load_path(fileName); // 'External' load 'fileName' and reads lines, REPLacement does not see this file
// This is a dirty workaround that accounts for the fact that 'DirectoryEntry.getFile' is asynchronous, thus pre-parsing checks fail intil loaded
var counter = 0, maxLoops = 10;
nuClock();
do{
sleep(500);
counter++;
preDebug.innerText += '\r\nLoop:' + counter + " , " + time_since_last();
}while( !External.curFile.lodd && (counter < maxLoops) ); //idle and check if file loaded, 5000ms max
preDebug.innerText += '\r\nLoaded?:' + External.curFile.lodd;
preDebug.innerText += '\r\nLines?:' + External.curFile.lins;
if( External.curFile.lodd ){ // The last load operating was successful, attempt to parse and interpret each line
// parse and interpret lines, storing each meaning in 'curLineMeaning', until last line is reached
while(!External.curFile.rEOF){
curLineMeaning = meaning( s( External.readln_from_current_file() ), context);
preDebug.innerText += '\r\nNext Line?: ' + External.curFile.lnnm;
preDebug.innerText += '\r\nEOF?: ' + External.curFile.rEOF;
}
} // else, return 'null'
return curLineMeaning; // return the result of the last form
}
which calls the following:
External.read_file_in_load_path = function(nameStr){ // Read the lines of 'nameStr' into 'External.curFile.lins'
External.curPath.objt.getFile( // call 'DirectoryEntry.getFile' to fetch a file in that directory
nameStr,
{create: false},
function(fileEntry){ // action to perform on the fetched file, success
External.curFile.name = nameStr; // store the file name for later use
External.curFile.objt = fileEntry; // store the 'FileEntry' for later use
External.curFile.objt.file( function(file){ // Returns 'File' object associated with selected file. Use this to read the file's content.
var reader = new FileReader();
reader.onload = function(e){
External.curFile.lodd = true; // File load success
};
reader.onloadend = function(e){
//var contents = e.target.result;
// URL, split string into lines: http://stackoverflow.com/questions/12371970/read-text-file-using-filereader
External.curFile.lins = e.target.result.split('\n'); // split the string result into individual lines
};
reader.readAsText(file);
External.curFile.lnnm = 0; // Set current line to 0 for the newly-loaded file
External.curFile.rEOF = false; // Reset EOF flag
// let's try a message instead of a flag ...
/*chrome.runtime.sendMessage({greeting: "hello"}, function(response) {
console.log(response.farewell);
});*/
} );
},
function(e){ External.curFile.lodd = false; } // There was an error
);
};
This app is a dialect of Scheme. It's important that the app knows that the source file has been loaded or not.

I didn't read through all of your code, but you can't kick off an asynchronous activity and then busy-wait for it to complete, because JavaScript is single threaded. No matter what's happened, the asynchronous function won't be executed until the script completes its current processing. In other words, asynchronous does not imply concurrent.
Generally speaking, if task A is to be performed after asynchronous task B completes, you should execute A from the completion callback for B. That's the straightforward, safe way to do it. Any shortcut, to achieve better responsiveness or to simplify the code, is going to have dependency or race-condition problems, and will require lots of horsing around to get right. Even then, it will be hard to prove that the code operates correctly on all platforms in all circumstances.

Error when decoding base64 with buffer. First argument needs to be a number

I am working on running different encoding statements based on the URL.
My code:
var parsedUrl = url.parse(req.url, true);
var queryAsObject = parsedUrl.query;
var myString = queryAsObject["string"];
var myFunction = queryAsObject["function"];
if (myFunction == "encodeb64") {
var bufEncode = new Buffer(JSON.stringify(myString));
var myEncode = bufEncode.toString('base64');
console.log(myEncode);
}
else {
console.log("Error1");
};
if (myFunction == "decodeb64") {
// var bufDecode = new Buffer(myEncode, 'base64');
// var myDecode = bufDecode.toString('utf8');
var myDecode = new Buffer(myEncode, 'base64').toString('utf8');
console.log(myDecode);
}
else {
console.log("Error2");
};
URL used: http://127.0.0.1:8020/?string=text&function=decodeb64
The issue is that I am having is with the last if statement. If its looking for decodeb64 and the first statement is looking for encodeb64 it crashes when function=decodeb64 is in the URL. If both if statements are looking for either encodeb64 or decodeb64, it runs perfectly. It also works if function=encodeb64 is in the URL.
The error message I get is:
buffer.js:188
throw new TypeError('First argument needs to be a number, ' +
^
It points to:
var myDecode = new Buffer(myEncode, 'base64').toString('utf8');
The given number on the error is pointed to the n in new.
I have located the problem to be inside the decode if statement by moving and reversing the order on the code.
As you can see in my code notes, I have tried two different methods of decoding with no success.

The reason that it crashes I believe is that when function=decode64, the variable myEncode is not declared and initialized, as the if(myFunction=="encode64") block is not run.
So when the code tried to new Buffer(myEncode...) it would fail as myEncode is undefined.
I think you meant to code :
var myDecode = new Buffer(myString, ...)
instead

Cannot access elements in object returned by Javascript Function in AngularJS

Thanks to #asgoth, I am able to use AngularJS $http service to retrieve stock prices from Yahoo as described here: Cannot read response from AngularJS $resource JSONP get from Yahoo Finance
In the "getHistoricalPrice" function, it puts the price inside an array, which is inside an object. From inside that function, I am able to access the price and write it to console.
The function returns the object to where it is called from. From there, I can successfully write the entire object out to console. However, I cannot access the elements of this object. I tried many different ways, but still cannot access the data in the object. You can see the code at http://jsfiddle.net/curt00/LTazR/2/ or below:
angular.module('app', ['ngResource']);
function AppCtrl($scope, $http, $resource) {
var historical_price = getHistoricalPrice("AAPL", 'start date is hard coded', 'end date is hard coded');
console.log("after calling historical price: ", historical_price); // historical_price is an object and all of the correct data is outputted to console here, but I cannot access its elements directly from Javascript.
for(var key in historical_price) {
console.log("key =",key); // this outputs "key = list"
}
console.log("after calling getHistoricalPrice: ", historical_price.list[0][1]); // Cannot access this as browser console gives error: TypeError: Cannot read property '1' of undefined
console.log("after calling getHistoricalPrice: ", historical_price['list'][0][1]); // Cannot access this as browser console gives error: TypeError: Cannot read property '1' of undefined
console.log("after calling getHistoricalPrice: ", historical_price[0][1]); // Cannot access this as browser console gives error: TypeError: Cannot read property '1' of undefined
function getHistoricalPrice(symbol, start, end) {
var query = 'select * from csv where url=\'http://ichart.yahoo.com/table.csv?s=' + symbol + '&a=' + '11' + '&b=' + '19' + '&c=' + '2012' + '&d=' + '11' + '&e=' + '19' + '&f=' + '2012' + '&g=d&ignore=.csv\'';
var url = 'http://query.yahooapis.com/v1/public/yql?q=' + fixedEncodeURIComponent(query) + '&format=json&callback=JSON_CALLBACK';
var histData = {};
$http.jsonp(url, {timeout: 30000}).success(function(json) {
var list = [];
var result = json.query.results.row;
result.shift(); // remove the header (columns) row
angular.forEach(result, function(row) {
list.push([(new Date(row.col0)).getTime()/1000, parseFloat(row.col4)]);
});
list.sort(function(val1, val2) {
return val1[0] - val2[0];
});
histData.list = list;
console.log('Loaded historical data',histData.list[0][1],', for ' + symbol); // This works and gives the price
});
return histData;
}
var fixedEncodeURIComponent = function(str) {
return encodeURIComponent(str).replace(/[!'()]/g, escape).replace(/\*/g, "%2A");
};
}
​
Any help or suggestions to solve this problem is greatly appreciate!

It's a matter of timing.
In lines 12-14 you are trying to access histData.list before it has been populated. This is because this code is run before the success callback to the $http.jsonp function is executed.
Any code that depends on that callback being completed must be in the callback or in a function called in the callback.

See my answer on https://stackoverflow.com/a/13967709/1916258
A great way to debug the Yahoo api is using the YQL Console: http://developer.yahoo.com/yql/console/
Info about the different posibilities (which stock info) can be found on http://www.gummy-stuff.org/Yahoo-data.htm
Edit: there was still a problem with function fixedEncodeURIComponent. It should encode quotes (") too:
var fixedEncodeURIComponent = function(str) {
return encodeURIComponent(str).replace(/[!'()]/g, escape).replace(/\*/g, "%2A").replace(/\"/g, "%22");
};

BobS is right, you aren't timing things correctly. Also you declared fixedEncodeURIComponent after you had called it. This was resulting in an immediate error when I loaded up the jsfiddle.
While you were passing the callback through to your function correctly, you weren't actually calling it. I stripped out all the post processing of the json as you have some other errors involving the query and just implemented the callback so you can see it working.
After the request is finished and you're still in the success function you need to add
if(typeof(callback) === "function"){
callback();
}
This calls that function you passed in and runs it. Here is a working jsFiddle of it:
http://jsfiddle.net/LTazR/22/
I also updated a new variable i created call output so you can see it changing.

Thanks to everybody for providing suggestions.
I solved the problem by using AngularJS' $scope variable, such as $scope.symbol[user].price. I created this variable before calling the getHistoricalPrice function and then in that function, after the result is returned from $http.jsonp, I put the value into the $scope variable, as such:
$scope.symbol[user].price = row.col4;

Why is this javascript object property undefined?

I am using an approach described in detail at Dictionary Lookups in Javascript (see the section"A Client-Side Solution") to create an object that contains a property for each word in the scrabble dictionary.
var dict = {};
//ajax call to read dictionary.txt file
$.get("dictionary.txt", parseResults);
function parseResults(txt) {
var words = txt.split( "\n");
for (var i=0; i < words.length; i++){
dict[ words[i] ] = true;
}
console.log(dict.AAH);
console.log(dict);
if (dict.AAH == true) {
console.log('dict.AAH is true!');
}
}
(updated code to use an earlier answer from Phil)
I can't figure out why dict.AAH is returning undefined, but the dict object looks fine in the console. Screenshots from Firebug below.
Console:
Drilled down into "Object { }"
How can I check a given word ("AAH", in this case) and have it return true if it is a property in the dict object defined as true?
Live example
Code on Github

The problem isn't your code. You have invisible characters in your words, which you fail to clean up.
You can verify this by using this as your results parser
function parseResults(txt) {
// clean the words when we split the txt
var words = txt.split("\n")
.map($.trim)
.splice(0,3); // Keep only 3 first ones
if(btoa(words[2]) !== btoa('AAH')){ // Compare in Base64
console.log('YOU HAVE HIDDEN CHARS!');
}
}
And you can fix it by whitelisting your characters.
function parseResults(txt) {
// clean the words when we split the txt
var words = txt.split("\n").map(function(el){
return el.match(/[a-zA-Z0-9]/g).join('');
});
for (var i=0; i < words.length; i++){
dict[ words[i] ] = true;
}
console.log(dict.AAH);
console.log(dict);
if (dict.AAH == true) {
console.log('dict.AAH is true!');
}
}
I would recommend cleaning it up on the server side since running regex on every element in an array as large as seen in your live site might cause performance issues.

It's probably a race condition. You're loading the dictionary in a GET and then immediately (while the request is being made) those console.log commands are being called (and the one comes back undefined). Then the data is actually loaded by the time you debug. Everything should be done in a callback or deferred. It's an understandable quirk of debuggers that's caught me up before.

Get ajax requests are asynchronous. This means that while the whole operation that occurs in the ajax request is going, javascript keeps reading the next lines.
The problem then is you are logging values that the ajax request did not manage to retrieve early enough.
To get around the issue you can include the log calls inside your ajax request callback as below
var dict = {};
//ajax call to read dictionary.txt file
$.get("dictionary.txt", function( txt ){
var words = txt.split( "\n");
for (var i=0; i < words.length; i++){
dict[ words[i] ] = true;
}
//Now inside these console.log will run once you DO have the data
console.log(dict.AAH);
console.log(dict);
});
//Stuff out here will run whether or not asynchronous request has finished
I WOULD RECOMMEND USING THE WHEN METHOD IN JQUERY FOR THIS TYPE OF SCENARIOS EVEN MORE AS THE BEST SOLUTION
HERE IS HOW WHAT I THINK WOULD BE MOST PROPER FOR COMPLEX PROJECTS
var dict = {};
//ajax call to read dictionary.txt file
function getDictionary(){
return $.ajax("dictionary.txt");
}
/*I recommend this technique because this will allow you to easily extend your
code to maybe way for more than one ajax request in the future. You can stack
as many asynchronous operations as you want inside the when statement*/
$.when(getDictionary()).then(function(txt){//Added txt here...forgot callback param before
var words = txt.split( "\n");
for (var i=0; i < words.length; i++){
dict[ words[i] ] = true;
}
//Now inside these console.log will run once you DO have the data
console.log(dict.AAH);
console.log(dict);
});

You're trying to output dict before it has been populated by the $.get success handler.
Try this:
// If the browser doesn't have String.trim() available, add it...
if (!String.prototype.trim) {
String.prototype.trim=function(){return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');};
String.prototype.ltrim=function(){return this.replace(/^\s+/,'');};
String.prototype.rtrim=function(){return this.replace(/\s+$/,'');};
String.prototype.fulltrim=function(){return this.replace(/(?:(?:^|\n)\s+|\s+(?:$|\n))/g,'').replace(/\s+/g,' ');};
}
/**
* Parses the response returned by the AJAX call
*
* Response parsing logic must be executed only after the
* response has been received. To do so, we have to encapsulate
* it in a function and use it as a onSuccess callback when we
* place our AJAX call.
**/
function parseResults(txt) {
// clean the words when we split the txt
var words = txt.split("\n").map($.trim);
for (var i=0; i < words.length; i++){
dict[ words[i] ] = true;
}
console.log(dict.AAH);
console.log(dict);
if (dict.AAH == true) {
console.log('dict.AAH is true!');
}
}
// global object containing retrieved words.
var dict = {};
//ajax call to read dictionary.txt file
$.get("dictionary.txt", parseResults);
As another user commented, jQuery's $.when lets you chain such code.
By the way, if all you want to do is know if a word is in the results you can do:
function parseResults(txt) {
// clean the words when we split the txt
var words = txt.split("\n").map($.trim);
if ($.inArray('AAH', words)) {
console.log('AAH is in the result set');
}
}

I think the problem lays in that you have dict defined as an object but use it as an array.
Replace var dict = {} by var dict = new Array() and your code should work (tried with your live example on Google Chrome).