jQuery post not working whereas get works with same structure - javascript

I've got an ajax call to the following php method:
public function test(){
die(json_encode(['test' => 'test1']));
}
My ajax call works when set as GET but not as POST. The GET call is:
$.ajax({
type: 'get',
url: url,
success: function(msg) {
log(msg);
},
dataType: 'json'
});
Which successfully returns the JSON element. But when I set it as POST:
$.ajax({
type: 'post',
url: url,
success: function(msg) {
log(msg);
},
dataType: 'json'
});
Returns nothing. If I removed the dataType it will return the whole webpage where it's being triggered from.
I do need to make the request as POST since I'll be sending a large amount of data.
Thanks.

Do you have CSRF protection enabled?

Related

How to access this data in Javascript?

I have this encode in JSON format as returned data:
{
"error": {
"msg":"Concurrent verifications to the same number are not allowed",
"code":10
}
}
and I want to access msg so I wrote the javascript as:
$("#buttonPhoneSubmit").click(function(e) {
$("#verifyForm").show();
e.preventDefault();
$.ajax({
type: 'post',
url: './process.php',
data: $('form').serialize(),
datatype:'json',
success: function (data) {
$('#error_message').html(data.error.msg);
}
});
but it said the data is undefined. Can someone tell me what's wrong with the code?
Thanks!
As Roy said, you have datatype: 'json' instead of dataType: 'json'. So I suspect jQuery isn't parsing the JSON for you.
While you could change it to dataType: 'json' instead, the better approach is to update the PHP file to send the Content-Type: application/json header with the response:
// In the PHP, prior to sending the body of the response
header('Content-Type: application/json');
...and remove datatype: 'json' from your ajax call. jQuery will see the content type and parse it for you, at which point your code should work (assuming the page return returns the JSON you've quoted).

Javascript POST to API

So I am a bit lost and hoping you can help me out. I am writing an app in simple PHP/HTML/Javascript app.
My Goal: To POST json data to an API.
How can I go about this? I just can't find any good examples to show me the best way to handle this.
In my request I need to send Basic Authorization as well as the json values.
This is what I have right now
$.ajax({
type: "POST",
url: "host.com/api/comments",
dataType: 'json',
async: false,
headers: {
"Authorization": "Basic xxxxxxxxxxxxxxxxxxxxxxx"
},
data: '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}',
success: function (){
alert('Comment Submitted');
}
});
I can't get the above code to work. Im using a button to call a function that will start the ajax call but nothing is happening.
Any help be be amazing! Thank You.
Use
contentType:"application/json"
You need to use JSON.stringify method to convert it to JSON format when you send it,
And the model binding will bind the json data to your class object.
The below code will work fine (tested)
$(function () {
var customer = {contact_name :"Scott",company_name:"HP"};
$.ajax({
type: "POST",
data :JSON.stringify(customer),
url: "api/Customer",
contentType: "application/json"
});
});
If you're writing the API in PHP, and it uses $_POST to get the parameters, you shouldn't send JSON. PHP only knows how to decode multipart/form-data and application/x-www-form-urlencode. If you pass an object to $.ajax, jQuery will use the urlencode format.
Just take the quotes off the object that you're passing to the data: option.
$.ajax({
type: "POST",
url: "host.com/api/comments",
dataType: 'json',
async: false,
headers: {
"Authorization": "Basic xxxxxxxxxxxxxxxxxxxxxxx"
},
data: {"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}},
success: function (){
alert('Comment Submitted');
}
});
You also shouldn't use async: false, it is deprecated. Learn to write proper async code.
Nobody seems to have addressed one issue - the URL
If the page this is requested from is http://yourhost.com/path/file.html the request will be sent as http://yourhost.com/path/host.com/api/comments
As you have host.com in the URL, I assumed the request is to a different domain?
use one of
http://host.com/api/comments
https://host.com/api/comments
//host.com/api/comments
will only work if your page is loaded http and not https
will work only if the remote API supports https
will only always work properly if the remote API supports both http and https
The other issue is regarding the format of the sent data
The default content-type for $.ajax POST is application/x-www-form-urlencoded; charset=UTF-8
So, sending a POST request with various combinations of contentType and data shows the following
Firstly, without setting contentType
data: '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}'
request is sent as formData '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}'
data: {"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}},
request is sent as formdata, the following values:
value1: 2.0
value2: setPowerState
value3[state]: 0
looks better, because there's actually multiple values, not just a string
Now, let's set contentType
contentType: 'json', data: {"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}},
firefox does not tell me the format of the following string: 'value1=2.0&value2=setPowerState&value3%5Bstate%5D=0' - looks useless
And finally
contentType: 'json', data: '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}',
sends the following JSON: '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}'
So, finally, if the API requires JSON request data, and it's actually on a domain called "host.com"
$.ajax({
type: "POST",
url: "//host.com/api/comments",
dataType: 'json',
contentType: 'json', data: '{"value1":"2.0", "value2":"setPowerState", "value3":{"state":0}}',
});

Usage of JSON.stringify() breaks page without errors in console

Usage of JSON.stringify() breaks page without errors in console
EDIT: I read about jquery plugin jquery-json, I tried that with the same result.
var bookmarkParams = {"id":"123456"};
$.ajax({
url: 'http://service',
cache: false,
type: "POST",
dataType: "json",
headers: {
// some headers
},
contentType: 'application/json; charset=UTF-8',
data: JSON.stringify(bookmarkParams),
success: successCallback,
error: errorCallback
});
// successCallback & errorCallback are defined functions
any ideas why this might be?
If i don't use JSON.stringify() then the page does not break but my AJAX request won't function correctly when passing my data to the server.
What is params? Don't you mean bookmark params?
try this...
var bookmarkParams = '{"id":"123456"}';
then change params to bookmarkParams

JSONP via getJson not working?

I have getJson like this:
$.getJSON(userUrl+'scanp?callback=?', { 'someparametar': 100 }, function(data){
console.log(data);
});
and I do get a response from my url, and it looks like this:
'"jQuery1110010384737118147314_1401820556204({'hasWon':'false','code':'120580e9fce67a4921f31af7ffa358cc10c83b10','defaultReward':'{\"secure_url\":\"https://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"url\":\"http://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"resource_type\":\"image\",\"format\":\"png\",\"height\":960,\"width\":640,\"signature\":\"a8ca9bb867e0a3d99e1666b7891e8f918d81e627\",\"version\":1401318096,\"public_id\":\"k6jrm2pehwycmehrkicz\"}''}"'
Any idea why I don't get any response when I console.log it?
With 'callback' in your querystring, JQuery wraps the response with a randomly generated method name. To get JSON (without method name), remove 'callback=?' from querystring.
If your server supports JSONP, you can make a call like this :
$.ajax({
type: 'GET',
url: url,
jsonpCallback: 'jsonCallback',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
console.log(JSON.stringify(json));
},
error: function(e) {
console.log(e.message);
}
});
Hope this helps.
Well I figured it out, the request I wrote was perfectly fine. The thing that was causing the the problem was response I was getting from server.
It was JSON stringified before return.

How to send json request to rails using jquery

I would like to send JSON post request to rails 3 server. I have following ajax request:
$.ajax({
type: 'POST',
contentType: "application/json",
url: url,
data: {email: "example#test.com", password: "password"},
success: onSuccess,
error: onError,
dataType: "json"
});
However the rails server receive the data as following:
{"_json"=>["object Object"]}
Where I want it to receive it as:
{"email"=>"exmaple#test.com", "password"=>"[FILTERED]"}
I think this is happening because the jquery wraps the data with _json object if the content type is json.
Does anybody know how I should do this?
This turns out to be because of bugs in old version of jquery. I now user jquery version 1.5 and send post request as follow:
$.post(url, { email: emailVal, password: passwordVal }, callback, "json").error(errorHandler);
It now works perfectly fine.
have you tried doing the serialization yourself (using jQuery.param)?
jQuery.param({email: "example#test.com", password: "password"})
==> "email=example%40test.com&password=password"
So that your ajax request becomes:
$.ajax({ type: 'POST',
contentType: "application/json",
url: url, data: $.param({email: "example#test.com", password: "password"}),
success: onSuccess,
error: onError,
dataType: "json"
});
According to jquery docs it seems like if you pass in an object to data it will try some automatic deserialization.
Set processData: false and then set data to json string.
http://api.jquery.com/jQuery.ajax/

Categories