I'm using a custom object extended from fabric.Image in my canvas, as suggested in this answer. When I retrieve the json string from the server, I get odd errors when attempting to load it to the canvas:
var canvas = new fabric.Canvsd();
function loadCanvas(resp) {
// response object contains a data field
// that's essentialy a JSON string
var json = JSON.parse(resp.data);
canvas.loadFromDatalessJSON(json);
}
I get an odd printout to the console: Cannot call method 'setupState' of undefined (fabric.min.js: 1118). I tried replacing the call with canvas.loadFromJSON(json), and instead got a vague SyntaxError: Unexpected token o error. When I used a regular fabric.Image before the change suggested in the linked thread, this code worked fine. I fear this might be something I'm missing when I extended favric's Image class with aditional data. Thoughts?
After some search I saw a similar thread in the fabricjs google group. Turned out I messing up 3 things:
I was missing a fromObject() callback definition in a different location for another custom object I made (I had a couple).
I was using loadFromDatalessJSON() when I should have been using simply loadFromJSON().
I was parsing the json string into an actual JSON using JSON.parse(json) before passing it into the loadFromJSON() function, which expected a json string and handled the parsing internally.
Derp.
Related
When recaptcha makes the call to https://www.google.com/recaptcha/api2/userverify?k=
It comes back with this
)]}'
["uvresp",,,,2]
Granted with a valid k it comes back with a bit more. However the )]}' is clearly invalid json.
When I try to retrieve the response with grecaptcha.getResponse() I get an empty string.
Same result when using curl.
Any help would be appreciated.
Actually the value returned is not valid json but well parsed by the Google's API.
Is it a protection ? I don't know, but if you look at the javascript, you can find that:
var jm=function(a,b,c,d,e,g,h,l,r){this.xl=a;this.$c=c||"GET";this.Ka=d;this.Gg=e||null;this.Td=m(h)?h:1;this.ye=0;this.xh=this.Nh=!1;this.uh=b;this.Mh=g;this.md=l||"";this.Zb=!!r;this.Wf=null};f=jm.prototype;f.getUrl=function(){return this.xl};f.ug=function(){return this.$c};f.Ca=function(){return this.Ka};f.fi=function(){return this.Zb};f.bi=function(){return this.md};var nm=function(){G.call(this);this.nj=new hm(0,mm,1,10,5E3);H(this,this.nj);this.ad=0};x(nm,G);var mm=new Nh;nm.prototype.send=function(a){return new Lc(function(b,c){var d=String(this.ad++);this.nj.send(d,a.Uf.toString(),a.ug(),a.Ca(),mm,void 0,u(function(a,d){var h=d.target;if(Xk(h)){var l=a.ml;h.B?(h=h.B.responseText,0==h.indexOf(")]}'\n")&&(h=h.substring(5)),h=Hg(h)):h=void 0;b(new l(h))}else c(new om(a))},this,a))},this)};var om=function(a){y.call(this);this.request=a};x(om,y);
especially take a look at:
var l=a.ml;h.B?(h=h.B.responseText,0==h.indexOf(")]}'\n")&&(h=h.substring(5)),h=Hg(h)):h=void 0;`
The parser explicitly checks that the value begins by )]} and strips it.
I suggest you to just apply the same substring on the "json" string
I am trying to access the steamid data in a json response returned by an API, specifically the Steam API.
The responses look like this:
I've made it return json but why do I see array all over the place?
How would I access the steamid data? I'm getting a bit confused as I thought this would be json.
I'm using guzzle to get the data and converting it to json using the guzzle json() method:
Any help would be appreciated.
Thanks!
The API is indeed using JSON to send/receive , however JSON is just a string, so in order to use that data PHP must parse it, which is automatically handled by guzzle, so as soon as you get the data back it has automatically decoded the data into a usable format for yourself.
It does this using the json_encode() and json_decode() functions.
You'd be able to access the steamid with the following.
// Assuming $data is your response from the API.
$players = array_get($data, 'response.players', []);
foreach($players as $player)
{
$steamId = array_get($player, 'steamid', null);
}
Using the laravel helper array_get() function is a great way of ensuring you return a sane default if the data doesn't exist as well as eliminating the need to keep doing things like isset() to avoid errors about undefined indexes, etc. http://laravel.com/docs/5.1/helpers
Alternativly not using the laravel helpers you could use something similar to below, although I'd advise you add checks to avoid the aforementioned problems.
foreach($data['response']['players'] as $player)
{
$steamId = $player['steamid'];
}
If you didn't want guzzle to automatically decode the API's JSON I believe you should just be able to call the getBody() method to return the JSON string.
$json = $response->getBody();
I found a tutorial for server implementation in a game on this link:
http://unity-tutorials.blogspot.in/
I implemented the code for my server sending in the following data on the Login Section to my Server:
{"email":"rudi#mrpatch.co", "pass": "mrpatch"}
This server is implementing JSON and is giving the below response :
Receive response: "{\"status\":\"success\",\"data\":[{\"id\":\"1\",\"email\":\"rudi#mrpatch.co\",\"password\":\"mrpatch\",\"first_name\":\"Rudi\",\"last_name\":\"Ullon\",\"birth_date\":\"1981-03-20\",\"status\":\"1\"}]}"
There is a JSON parser script in this project, which returns System.string , this is being used by a parser in my other script LoginService.js
But while I am trying to store this in a Boo.Lang.Hash (hashtable) it gives me error in following code:
var parsed : Boo.Lang.Hash = JSONParse.JSONParse(httpResponse.text);
This is the Error message I am getting:
InvalidCastException: Cannot cast from source type to destination type.
LoginService+$sendLoginData$6+$.MoveNext () (at Assets/Scripts/StartMenu/LoginService.js:61)
I have tried saving it a Boo.Lang.Hash, as String etc. but nothing seems to be working.
if you have json you can do in this way.
var parsed : Boo.Lang.Hash = JSONParse.JSONParse(your json );
Oh boy...
You seem to have quite some conceptual issues with type casting and that's a far too broad topic (joke link). :P
The error message means you can't convert from String to that Hashtable through casting. You need a function to convert it for you or do it yourself.
The JSONParse you mentioned can actually do it:
var jsonData : json = json.fromString(httpResponse.text);
At least now you have jsonData.values which can be easily converted to a Hashtable...
But keep in mind "Hashtables" are obsolete and even the Unity Player will warn you about it. Read more.
you must use the JsonPare.js from source code on the demo.https://docs.google.com/file/d/0B0HipNssJJD-bEh0Wi1XeV9PSlE/edit
I figure this may be an unconventional way of creating a JSON string. But, I really need to just be able to make it right in "Sequel Pro" like this
I want to be able to just edit it right there like that. But when I receive the string on the client end, then try to use as3 JSON.parse function on it, it gets an error..."SyntaxError: Error #1132: Invalid JSON parse input."
private function storyTextCallBack(r:Object):void
{
//storyText is an 'Object'
storyText = JSON.parse(r.text);
}
But this is how my client is actually getting it, and it's what I think is breaking the JSON.parse function.....
[\n\t{\n\t\ttext: "hello this is some json test stuff",\n\t\tduration: "5000"\n\t},\n\t{\n\t\ttext: "this is the second line in that json object thing",\n\t\tduration: "3000"\n\t},\n\t{\n\t\ttext: "this is the third and final line in that json object thing",\n\t\tduration: "8000"\n\t}\n]
anyone have any ideas how I can fix this?
The object names in your JSON need to be inside quotes:
"text":"example text"
You can check if you have a valid JSON object with this parser: http://json.parser.online.fr
I'm trying to parse a grails parameter map to a Json String, and then back to a parameter map. (For saving html form entries with constraint-violations)
Everything is fine as long as there is no hasMany relationship in the parameter-map.
I'm using
fc.parameter = params as JSON
to save the params as JSON String.
Later I'm trying to rebuild the parameter map and create a new Domain-Object with it:
new Foo(JSON.parse(fc.parameter))
Everything is fine using only 1:1 relationships (states).
[states:2, listSize:50, name:TestFilter]
But when I try to rebuild a params-map with multi-select values (states)
[states:[1,2], listSize:50, name:TestFilter]
I'm getting this IllegalStateException:
Failed to convert property value of type org.codehaus.groovy.grails.web.json.JSONArray to required type java.util.Set for property states; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [de.gotosec.approve.State] for property states[0]: no matching editors or conversion strategy found
I tried to use this, but without success:
JSON.use("deep") {
new Foo(JSON.parse(fc.parameter))
}
You can use JsonSlurper instead of the converters.JSON of grails, it maps JSON objects to Groovy Maps. I think this link also might help you.
Edit: Now, if the problem is binding the params map to your domain, you should try using bindData() method, like:
bindData(foo, params)
Note that this straightforward use is only if you're calling bindData inside a controller.
What seems to be happening in your case is that Grails is trying to bind a concrete type of List (ArrayList in the case of JsonSlurper and JSONArray in the case of converters.JSON) into a Set of properties (which is the default data structure for one-to-many associations). I would have to take a look at your code to confirm that. But, as you did substitute states: [1,2] for a method of your app, try another test to confirm this hypothesis. Change:
states:[1,2]
for
states:[1,2] as Set
If this is really the problem and not even bindData() works, take a look at this for a harder way to make it work using object marshalling and converters.JSON. I don't know if it's practical for you to use it in your project, but it sure works nicely ;)