JQuery Post sends form data and not JSON - javascript

Trying to send json. Here's my function:
var object = ... ;
$.ajax({
type: 'POST',
url: '<url>',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
data: object
});
But whenever I check Chrome, it always sends it as query params:
Request Payload:
startDate=Wed+Dec+19+2012+19%3A00%3A00+GMT-0500+(EST)&endDate=Thu+Dec+20+2012+19%3A00%3A00+GMT-0500+(EST)&
How do I get it to send as JSON?

With JSON.stringify(object)
Sample:
$.ajax({
type: 'POST',
url: '<url>',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
data: JSON.stringify(object)
});
Note JSON.stringify is not supported in all browsers (http://caniuse.com/#feat=json ), in particular browsers IE7 and lower.
If you need to support this browsers too you can use this Javascript library: https://github.com/douglascrockford/JSON-js

Stringify using JSON.stringify(object)
Modify the data field to:
...
data: JSON.stringify(object),
...
The way you are doing it, IMO, jQuery sees the parameter as a dictionary (key-value pairs), and constructs a percentile-encoded string from that; and hence you see that output.

I have found it easier to send data in default 'application/x-www-form-urlencoded' format with JSON as a field like this:
$.ajax({
type: 'POST',
url: '<url>',
dataType: 'json',
data: {json:JSON.stringify(object)}
});
On server use the regular method to receive field called json.
Just shared to see if this is valid for you.

Related

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}}',
});

Client submitted invalid JSON: lexical error: invalid string in json text.↵

I have an ajax POST method that, despite what I am sending to the server, is apparently appending a '↵' character to the value field. My code:
$.ajax({
url: url,
type: "POST",
data: {"name" : "lol"},
dataType : "json",
contentType : "application/json; charset=utf-8"
});
The error returned is error code 400 "Client submitted invalid JSON: lexical error: invalid string in json text.↵" and the console reports that this name=lol↵ is the data being sent.
I just read the error message again and checked with the docs here.
What you need to do is to send your request in JSON format, not as form-data. You specified the right contentType, but you need to convert your data using JSON.stringify
Look at this answer here for a possible solution.
In your case it would be something like this:
$.ajax({
url: url,
type: 'POST',
data: JSON.stringify({
name: 'lol',
}),
contentType: 'application/json; charset=utf-8',
dataType: 'json',
});
I hope that works for you. If this didn't work either, I would check with the docs at dev.groupme.com. Maybe you have misspelled some of the JSON fields?

Setting the POST-body to a JSON object with jQuery

I'm trying to write a JSON-based web API in a Sinatra app. I want to POST a JSON object as the post body (with the proper content-type set) but I'm struggling.
In Cocoa, I'd do something like
[mutableHTTPRequest setHTTPBody:dataRepresentationOfJSONObject];
And the content type, set to JSON, would then post the HTTP body as a JSON object. I'm trying to do this with jquery. The best I can do so far just takes the JSON object and turns it into a normal style key=value&… style post body, and that's not what I'm after.
My Javascript:
var data = { "user" : "me!" };
$.ajax({
type: "POST",
url: "/api/user/create",
contentType: 'application/json',
data: data,
success: function(r) {
});
Any pointers on how to do this? My goal is for my Sinatra to do like the following
post "/api/user/create" do
js = JSON.parse(request.body.read)
# do something with the js object… this works when POSTing from Cocoa
end
Add the processData parameter to your ajax request and set it to false. Additionally, you need to stringify your object to turn it into JSON.
var data = { "user" : "me!" };
$.ajax({
type: "POST",
url: "/api/user/create",
processData: false,
contentType: 'application/json',
data: JSON.stringify(data),
success: function(r) {
}
});
JSON.stringify will not work in older versions of IE unless you implement it. http://json.org

javascript soap error calling asp.net web service

I have a working ASP.Net test web service, but I keep getting 500 errors as:
"System.InvalidOperationException: Request format is invalid: text/xml.
at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()
at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()
"
when I call it with javascript.
It is a simple web service that takes a single parameter as a string and returns it to the client. Please help!
link to code here
For those of you who this might help, the issue was setting the SOAPAction in teh header correctly:
$.ajax({
type: "post",
url: target,
contentType: "text/xml",
data: soapBody,
dataType: "xml",
processData: false,
beforeSend: function( xhr ){
xhr.setRequestHeader(
"SOAPAction",
"http://blahblah.com/Services/MethodName"
);
},
....
Make sure that your mess variable doesn't contain GET-style query string like '?a=1&b=2'. You need to send it in POST format, for example in JSON. Try to change contentType to contentType: "application/json; charset=utf-8"
$.ajax({
url: service,
type: "POST",
dataType: "xml",
data: '{key: value}',
complete: endTest,
error: processError,
contentType: "application/json; charset=utf-8",
});

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/

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