I'm new in codeigniter 4
I just started a new project in Codeigniter 4, and i got an error using JSON.parse,
Unexpected token < in JSON at position 30
I get two different results from using different enviroments:
Default// did not make any change to codeigniter config
-The code run totaly fine, though for a second i manage to see a bug in console
-The bad thing, in this enviroment most of debugging tools are deactivated something that i would like to have while working.
SetEnv CI_ENVIRONMENT production // which makes the debugging tools from CI4 appear, this line is in .htacess
-The code stops at JSON.parse and get the error described before in console
So here it is how my code is estructured:
//controller
echo json_encode(array('status' => 0,'message'=>'Access denied'));
//response rgets data from callback from a controller
console.log(response);//{status:0,message:'Access denied'}
data=JSON.parse(response); //error
//Other fixes i already tried
data=JSON.parse(JSON.stringify(response)); //Works fine, but returns a string, need an object
data=JSON.parse(JSON.parse(JSON.stringify(response))); //error
data=JSON.parse("{status:0,message:'Access denied'} "); //Even trying to use directly a JSON format throws error
data=JSON.parse({status:0,message:'Access denied'}) //error, without the comas
data=JSON.parse([{status:0,message:'Access denied'}]) //error
The debbuging tools seem to stop the loading when they find a bug, but i have not managed to find what i am doing wrong. Hope you can help me with this and thanks in advance.
EDIT
I´m using webix libraries for request, but they return string format.
I tried manually what you suggested,but the result was the same. It works if use CI4 in production env, but fails at development mode.
//Solutions tried
response = JSON.parse({"status":0,"message":"Access denied"});//error
response = JSON.parse("{'status':0,'message':'Access denied'}");//error
echo json_encode(array('status' => 0,'message'=>'Access denied'));
//the response should be like this
{"status":0,"message":"Access denied"}
and then use like this
data=JSON.parse(response);
and kindly check your datatype during the post and it should be a json
Hi I'm trying to retrieve data from a title.JSON file into an index.html file using AJAX calls.Both these files resides in my local file system.I have created a new instance of the chrome and 've set its target property as "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"--disable-web-security --user-data-dir="c:/chromedev"(I'm aware that this is not a good practice. Just trying out a server less way).Below is my code
<h1><a id="headName" href="#">Name</a></h1>
<p onclick="spaLoad()">NameChange</p>
function spaLoad(){
var xhr = new XMLHttpRequest();
xhr.open('GET','title.json',true);
xhr.send();
xhr.onreadystatechange=function () {
//var obj=xhr.responseText;
var obj = JSON.parse(xhr.responseText);
console.log(obj);
console.log(xhr.readyState);
console.log(xhr.status);
console.log(xhr.statusText);
//document.getElementById('headName').innerHTML = obj;
document.getElementById('headName').innerHTML = obj.name;
}
}
title.json
{"name":"stackoverflow","age":"100"}
I get my h1 updated as "stackoverflow" through an ajax call along with the error
Uncaught SyntaxError: Unexpected end of JSON input
at JSON.parse ()
at XMLHttpRequest.xhr.onreadystatechange
Here are my doubts:
1.I hope AJAX is for the communication between the client and the server. Though I have avoided using a server by modifying the browser settings, how did the ajax call work for me?Is it logical?
2.The JSON file contains the data as objects.Then why should I use JSON.parse(responseText)?(JSON.parse() is for converting the string from server into object for client I hope).If i directly give var obj=xhr.responseText;I get undefined.
3.readystate is changing to 4, but status is always 0.Why is it so?How could I resolve it.
Please give a brief explanation of how this server less ajax call works.I'm very new to ajax and is confused with this.
It is because readystate change fires multiple times and you expect it to fire once. You would need to check for readystate to be equal to 4 and the status to be 200 (or zero in your case since you are on the file protocol). Or use the onload and onerror events instead.
And if you still get a parsing error than you need to debug what is being returned.
//see what is returned
console.log(xhr.responseText)
//Look to see if you have hidden characters in the file.
console.log(escape(xhr.responseText))
Parsing errors occur either the file you are loading returns something else like an error page OR it has special hidden characters that cause the parser to choke.
First I know its annoying to have so much text instead of code to display the error, its just I'm not sure where I should start debugging, and therefore I will complement the thread as I go.
Here is the thing, I have a page where I have to upload multiple images and edit them in the browser. For that matter I developed javascript code where you can upload and edit the image inside a canvas and then output it to a hidden input.
Since the number of images a variable, another javascript function is necessary to create multiple inputs for new images.
Those images are, them, uploaded with other data by a post form. The process in which the post is processed is page_with_form --> process_form_page --> redirect_to_page, which is used to save the data into the database and the images to the server.
When uploading these multiple images in my local server no error is generated, but when I upload the code to the web server the script go bananas.
Every time I post the form WITH a multiple image (without the image uploaded the post is successful) an error occurs, but not always the same error. I had many different errors occurring actually.
The errors variate from outputting gibberish, like this:
‰PNG IHDR´ð©NH IDATxœd»wTUY‚¾]Ó=Ý=ÓSªzª«ÚŠ†2'Ì ”œsÎ9HF‚"* ‚ˆ(*"¨¨˜³¥‚JÎ9Þtn«»ºº,y~`÷Ì|ßï:÷œ³îZgóœw½{ïw°nñ "üqýF› B|Ùüù·¬ž±-_,ä›ßþ‰Ÿ~Ég¿þÛ¿YÀŸ~ó[>úÕò›_þ]]<6êâ±b5Ñ!DúcôÙ7|ò«?¢÷ç/0ûbž³çá2k!!u\¯CøcÂ,pÒÞIl`8q»¢‰ÛElhñÑ1ÄFEMLp±þaÄEÆCLxÑ»¢‰ $&$‚˜b㉊!66–¸Ø8â"£ˆ%>>žøø8’““IJˆ'1Ò„]>$z¹ëCÒ.7LV.ÂJ{úØmYI‰Û7šà¦§ƒî‚o°Ú¢EB’É»ˆõ7#ÖÛ„Ä]$„†ëJ´‹^;vadI˜Ž þëôpÑ5ÃtËV¶,^ŠÉÆ,ÿf6+gÎa§ÖZÌÖ¯'f—+ZŸ.ÄDk«–aµr#Kþ¬…Ùúõ˜¬]‰ÅÆͬœ¹„¿ü~&[V`ªãÄWÿ=—û¿ÿøÝoþÀï~óG>üõïøÏû-‰‰IìÙ³—øøxbcc‰%&&...
Or giving an errors like:
PHP Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in E:\Home\gerenciamentodelegac\Web\documents\imgs\tatoos\51d115e8909cc397141e9a39651fa88a6d7302aeaee4248d257b8c8f16bf87ba.png on line 18
PHP Parse error: syntax error, unexpected ')' in E:\Home\gerenciamentodelegac\Web\documents\imgs\tatoos\d8e6765d3ab791adce3b325f6a1b8270e244a70df3739f34202f9158fa540f80.png on line 46
Or it just does not redirect to any page or show any error, it sits on the same page, and if a try to upload again a new error is generated:
PHP Warning: include(documents/imgs/tatoos/97ebacba3f87fd2477bb74a523fcc4810002a474b569b43b485ddac7c885ede5.png) [<a href='function.include'>function.include</a>]: failed to open stream: No such file or directory in E:\Home\gerenciamentodelegac\Web\fetch_page.php on line 70
PHP Warning: include() [<a href='function.include'>function.include</a>]: Failed opening 'documents/imgs/tatoos/97ebacba3f87fd2477bb74a523fcc4810002a474b569b43b485ddac7c885ede5.png' for inclusion (include_path='.;c:\PHP_5.3\includes') in E:\Home\gerenciamentodelegac\Web\fetch_page.php on line 70
But here is the crazy part: All the data is outputted correctly! The data is correctly saved to the database and the images are saved to the server.
Now, the local server uses PHP 5.5 and the web server uses PHP 5.3, and here is the code to save the image:
for ($i = 0; $i < sizeof($tatoos); $i++) {
if (!file_exists($tatoos[$i])) {
$uri = substr($tatoos_src[$i], strpos($tatoos_src[$i], ",") + 1);
$success = file_put_contents($tatoos[$i], base64_decode($uri));
}
}
Where should I start trouble shooting? Any idea where the error may relies?
I am running an AJAX call in my MooTools script, this works fine in Firefox but in Chrome I am getting a Uncaught SyntaxError: Unexpected token : error, I cannot determine why. Commenting out code to determine where the bad code is yields nothing, I am thinking it may be a problem with the JSON being returned. Checking in the console I see the JSON returned is this:
{"votes":47,"totalvotes":90}
I don't see any problems with it, why would this error occur?
vote.each(function(e){
e.set('send', {
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = JSON.decode(resp);
if (!j) return false;
var restaurant = e.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
});
e.addEvent('submit', function(e){
e.stop();
this.send();
});
});
Seeing red errors
Uncaught SyntaxError: Unexpected token <
in your Chrome developer's console tab is an indication of HTML in the response body.
What you're actually seeing is your browser's reaction to the unexpected top line <!DOCTYPE html> from the server.
Just an FYI for people who might have the same problem -- I just had to make my server send back the JSON as application/json and the default jQuery handler worked fine.
This has just happened to me, and the reason was none of the reasons above. I was using the jQuery command getJSON and adding callback=? to use JSONP (as I needed to go cross-domain), and returning the JSON code {"foo":"bar"} and getting the error.
This is because I should have included the callback data, something like jQuery17209314005577471107_1335958194322({"foo":"bar"})
Here is the PHP code I used to achieve this, which degrades if JSON (without a callback) is used:
$ret['foo'] = "bar";
finish();
function finish() {
header("content-type:application/json");
if ($_GET['callback']) {
print $_GET['callback']."(";
}
print json_encode($GLOBALS['ret']);
if ($_GET['callback']) {
print ")";
}
exit;
}
Hopefully that will help someone in the future.
I have just solved the problem. There was something causing problems with a standard Request call, so this is the code I used instead:
vote.each(function(element){
element.addEvent('submit', function(e){
e.stop();
new Request.JSON({
url : e.target.action,
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = resp;
if (!j) return false;
var restaurant = element.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
}).send(this);
});
});
If anyone knows why the standard Request object was giving me problems I would love to know.
I thought I'd add my issue and resolution to the list.
I was getting: Uncaught SyntaxError: Unexpected token < and the error was pointing to this line in my ajax success statement:
var total = $.parseJSON(response);
I later found that in addition to the json results, there was HTML being sent with the response because I had an error in my PHP. When you get an error in PHP you can set it to warn you with huge orange tables and those tables were what was throwing off the JSON.
I found that out by just doing a console.log(response) in order to see what was actually being sent. If it's an issue with the JSON data, just try to see if you can do a console.log or some other statement that will allow you to see what is sent and what is received.
When you request your JSON file, server returns JavaScript Content-Type header (text/javascript) instead of JSON (application/json).
According to MooTools docs:
Responses with javascript content-type will be evaluated automatically.
In result MooTools tries to evaluate your JSON as JavaScript, and when you try to evaluate such JSON:
{"votes":47,"totalvotes":90}
as JavaScript, parser treats { and } as a block scope instead of object notation. It is the same as evaluating following "code":
"votes":47,"totalvotes":90
As you can see, : is totally unexpected there.
The solution is to set correct Content-Type header for the JSON file. If you save it with .json extension, your server should do it by itself.
It sounds like your response is being evaluated somehow. This gives the same error in Chrome:
var resp = '{"votes":47,"totalvotes":90}';
eval(resp);
This is due to the braces '{...}' being interpreted by javascript as a code block and not an object literal as one might expect.
I would look at the JSON.decode() function and see if there is an eval in there.
Similar issue here:
Eval() = Unexpected token : error
This happened to me today as well. I was using EF and returning an Entity in response to an AJAX call. The virtual properties on my entity was causing a cyclical dependency error that was not being detected on the server. By adding the [ScriptIgnore] attribute on the virtual properties, the problem was fixed.
Instead of using the ScriptIgnore attribute, it would probably be better to just return a DTO.
This happened to because I have a rule setup in my express server to route any 404 back to /# plus whatever the original request was. Allowing the angular router/js to handle the request. If there's no js route to handle that path, a request to /#/whatever is made to the server, which is just a request for /, the entire webpage.
So for example if I wanted to make a request for /correct/somejsfile.js but I miss typed it to /wrong/somejsfile.js the request is made to the server. That location/file does not exist, so the server responds with a 302 location: /#/wrong/somejsfile.js. The browser happily follows the redirect and the entire webpage is returned. The browser parses the page as js and you get
Uncaught SyntaxError: Unexpected token <
So to help find the offending path/request look for 302 requests.
Hope that helps someone.
If nothing makes sense, this error can also be caused by PHP Error that is embedded inside html/javascript, such as the one below
<br />
<b>Deprecated</b>: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in <b>C:\Projects\rwp\demo\en\super\ge.php</b> on line <b>54</b><br />
var zNodes =[{ id:1, pId:0, name:"ACE", url: "/ace1.php", target:"_self", open:true}
Not the <br /> etc in the code that are inserted into html by PHP is causing the error. To fix this kind of error (suppress warning), used this code in the start
error_reporting(E_ERROR | E_PARSE);
To view, right click on page, "view source" and then examine complete html to spot this error.
"Uncaught SyntaxError: Unexpected token" error appearance when your data return wrong json format, in some case, you don't know you got wrong json format.
please check it with alert(); function
onSuccess : function(resp){
alert(resp);
}
your message received should be: {"firstName":"John", "lastName":"Doe"}
and then you can use code below
onSuccess : function(resp){
var j = JSON.decode(resp); // but in my case i'm using: JSON.parse(resp);
}
with out error "Uncaught SyntaxError: Unexpected token"
but if you get wrong json format
ex:
...{"firstName":"John", "lastName":"Doe"}
or
Undefined variable: errCapt in .... on line<b>65</b><br/>{"firstName":"John", "lastName":"Doe"}
so that you got wrong json format, please fix it before you JSON.decode or JSON.parse
I had the same problem and it turned out that the Json returned from the server
wasn't valid Json-P. If you don't use the call as a crossdomain call use regular Json.
My mistake was forgetting single/double quotation around url in javascript:
so wrong code was:
window.location = https://google.com;
and correct code:
window.location = "https://google.com";
In my case putting / at the beginning of the src of scripts or href of stylesheets solved the issue.
I got this error because I was missing the type attribute in script tag.
Initially I was using but when I added the type attribute inside the script tag then my issue is resolved
I got a "SyntaxError: Unexpected token I" when I used jQuery.getJSON() to try to de-serialize a floating point value of Infinity, encoded as INF, which is illegal in JSON.
In my case i ran into the same error, while running spring mvc application due to wrong mapping in my mvc controller
#RequestMapping(name="/private/updatestatus")
i changed the above mapping to
#RequestMapping("/private/updatestatus")
or
#RequestMapping(value="/private/updatestatus",method = RequestMethod.GET)
For me the light bulb went on when I viewed the source to the page inside the Chrome browser. I had an extra bracket in an if statement. You'll immediately see the red circle with a cross in it on the failing line. It's a rather unhelpful error message, because the the Uncaught Syntax Error: Unexpected token makes no reference to a line number when it first appears in the console of Chrome.
I did Wrong in this
`var fs = require('fs');
var fs.writeFileSync(file, configJSON);`
Already I intialized the fs variable.But again i put var in the second line.This one also gives that kind of error...
For those experiencing this in AngularJs 1.4.6 or similar, my problem was with angular not finding my template because the file at the templateUrl (path) I provided couldn't be found. I just had to provide a reachable path and the problem went away.
In my case it was a mistaken url (not existing), so maybe your 'send' in second line should be other...
This error might also mean a missing colon or : in your code.
Facing JS issues repetitively I am working on a Ckeditor apply on my xblock package. please suggest to me if anyone helping me out. Using OpenEdx, Javascript, xblock
xblock.js:158 SyntaxError: Unexpected token '=>'
at eval (<anonymous>)
at Function.globalEval (jquery.js:343)
at domManip (jquery.js:5291)
at jQuery.fn.init.append (jquery.js:5431)
at child.loadResource (xblock.js:236)
at applyResource (xblock.js:199)
at Object.<anonymous> (xblock.js:202)
at fire (jquery.js:3187)
at Object.add [as done] (jquery.js:3246)
at applyResource (xblock.js:201) "SyntaxError: Unexpected token '=>'\n at eval (<anonymous>)\n at Function.globalEval (http://localhost:18010/static/studio/common/js/vendor/jquery.js:343:5)\n at domManip (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5291:15)\n at jQuery.fn.init.append (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5431:10)\n at child.loadResource (http://localhost:18010/static/studio/bundles/commons.js:5091:27)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5054:36)\n at Object.<anonymous> (http://localhost:18010/static/studio/bundles/commons.js:5057:25)\n at fire (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3187:31)\n at Object.add [as done] (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3246:7)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5056:29)"
Late to the party but my solution was to specify the dataType as json. Alternatively make sure you do not set jsonp: true.
Try this to ignore this issue:
Cypress.on('uncaught:exception', (err, runnable) => {
return false;
});
Uncaught SyntaxError: Unexpected token }
Chrome gaved me the error for this sample code:
<div class="file-square" onclick="window.location = " ?dir=zzz">
<div class="square-icon"></div>
<div class="square-text">zzz</div>
</div>
and solved it fixing the onclick to be like
... onclick="window.location = '?dir=zzz'" ...
But the error has nothing to do with the problem..