I'm trying to send an JS Object with an (POST) XMLHttpRequest, but I get no POST data in PHP.
This code worked before with an Ajax request, but i'm trying to get feedback from the server for an progressbar ( whitch is working fine now). That's why i've chagend to XMLHttpRequest.
The code:
var dataRows = {
'bewaarnaam': bewaarNaam,
rows: {}
};
$(".rows").each(function (i, obj) {
var row = $(obj);
var rowName = $(row).attr('name');
var chests = {};
$(".cv_chest", row).each(function (i2, obj2) {
chests[$(obj2).attr('id')] = {
'counter': $(obj2).attr('chest_counter'),
'height': $(obj2).attr('chest_height'),
'db_id': $(obj2).attr('db_id')
};
});
var top = $(row).css('top').replace("px", "");
var left = $(row).css('left').replace("px", "");
var rowData = {
'name': $(row).attr('name'),
'x': parseInt(left),
'y': (parseInt(top - 100)),
'rotation': rotation[$(row).attr('dir')],
'db_id': $(row).attr("db_id"),
'chests': chests
};
dataRows.rows[$(row).attr('id')] = rowData;
});
...
var xhr = new XMLHttpRequest();
xhr.open("POST", "{{ url('bewaarplaatsen/xhrTest/') }}", true);
xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhr.send(dataRows);
So my question is rather simple... How can i send an object with an post through the XmlHttpRequest function?
Use JSON:
var xhr = new XMLHttpRequest();
xhr.open("POST", "{{ url('bewaarplaatsen/xhrTest/') }}", true);
xhr.setRequestHeader("Content-type", "application/json");
xhr.send(JSON.stringify(dataRows));
EDIT:
You can also use newer fetch API, see Fetch: POST JSON data.
You can't. "An object" is a data structure that exists in memory and only makes sense to the program it is dealing with it.
You need to serialise the data (e.g. using the application/x-www-form-urlencoded format, or JSON, or XML, or a host of other choices) and send that instead.
If you are trying to send entire DOM elements (and it isn't clear what the data you are trying to send actually is) then serialising them would involve converting them to HTML or (and this would usually be the better option) a data structure that they represent.
Related
I am having problem sending base64 image data using ajax post
I think I have the wrong value for Content-Type but have tried application/json, text/json and image/jpeg without any success
Javascript
function sendFormData(fD)
{
var urls = fD.get('urls');
console.log('urls', urls);
var xhr = new XMLHttpRequest();
xhr.open('POST', '/editsongs.update_artwork');
alert(urls);
xhr.setRequestHeader("Content-type", "image/jpeg");
xhr.send(urls);
}
Browser console shows
["data:image/jpeg;base64,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…
Java Server code
public String updateArtwork(Request request, Response response)
{
System.out.println("Received artwork");
for(String s:request.queryParams())
{
System.out.println("---"+s);
}
System.out.println("ReadParms");
return "";
}
just outputs
Received artwork
ReadParms
Updated to Send as Form Instead
// Once we got everything, time to retrieve our objects
function sendData()
{
var fD = new FormData();
// send Files data directly
var files = imgList.filter(
function isFile(obj)
{
return obj.type === 'file';
}
);
files.forEach(
function appendToFD(obj)
{
fD.append('files[]', obj.file);
}
);
// for elems, we will need to grab the data from the server
var elems = imgList.filter(
function isElem(obj)
{
return obj.type === "element";
}
);
var urls = elems.map(
function grabURL(obj)
{
return obj.element.src;
}
);
if (urls.length)
fD.append('urls', JSON.stringify(urls));
sendFormData(fD);
};
function sendFormData(fD)
{
// but here we will just log the formData's content
var files = fD.getAll('files[]');
console.log('files: ', files);
var urls = fD.get('urls');
console.log('urls', urls);
var xhr = new XMLHttpRequest();
xhr.open('POST', '/editsongs.update_artwork');
xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhr.send(fD);
}
then on server I have
public String updateArtwork(Request request, Response response)
{
System.out.println("Received artwork");
for(String s:request.queryParams())
{
System.out.println("***"+s);
System.out.println(request.queryParams(s));
}
System.out.println("ReadParms");
return "";
}
and its outputs
Received artwork
***-----------------------------330219842643
Content-Disposition: form-data; name
"urls"
["data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBxMSEhUSExIWFhUXFxgXGBcYFRgXFxkdGBcWGBgYFx0YHSggHR0lHRkYITEhJSkrLi4uFyA1ODMtNygtLisBCgoKDg0OFQ8PFSsZFRkrLSstLSstKysrLS03KystLSstKy03LSstLSstNzc3KysrLS0tKysrKysrKysrKysrK//AABEIAKoBKQMBIgACEQEDEQH...."]
-----------------------------330219842643--
ReadParms
So I'm now getting the data but I don't understand really understand how to parse the Content-Disposition part in Java.
This code wasn't originally written by me, as you can see the FormData is constructed it doesnt come from an actual form. My first attempt was to try and extract from FormData and send in different way, an alternative would be to not store in FormData in the first place but dont know how to do this.
Update 2
Tried just sending first url rather than formdata or an arrya of urls, because actually there is only ever one url.But it just doesnt work, nothing received by server ?
function sendFormData(urls)
{
console.log('urls', urls[0]);
var xhr = new XMLHttpRequest();
xhr.open('POST', '/editsongs.update_artwork');
xhr.setRequestHeader("Content-type", "text/json");
alert(JSON.stringify(urls[0]));
xhr.send(JSON.stringify(urls[0]));
}
You are trying to view data in the body using queryParams(), which will give you the query params that are located in the url.
Load data from the request body using body().
For some reason I cannot use $.ajax, only the XMLHttpRequest.
I need to send json to laravel controller. When I tried it, I only got 500s
Here's how I make the request:
const sendEdit = function(){
let xhr = new XMLHttpRequest();
xhr.open("POST", "/blog/edit");
xhr.setRequestHeader("Content-Type","application/json");
xhr.setRequestHeader('X-CSRF-TOKEN', $('meta[name="csrf-token"]').attr('content'))
let data = {};
data.header = $("#editHeader").val();
data.body = $("#editBody").val();
data.postId = {{$post->id}};
data.userId = {{Auth::user()->id}}
xhr.onreadystatechange = function(d){
}
xhr.send([data]);
}
The controller returned 500. When I tried to var_dump $request->json() or $request->all() it showed me an error. Here's my controller. Please help me access the data in JSON
public function edit(Request $request){
echo(var_dump($request->all()));
}
The problem was not using JSON.stringify() before sending the request.
I am brand new to javascript and have spent the past few hours trying to parse json data from an api url into my body in my html document. My only experience with APIs are with C# wrappers so this is new to me.
This is the API url: https://catfact.ninja/fact
I'm not sure where to go from here. I've been able to successfully pull the data I want, but I'm only able to print it to the console and I'm not sure how to pull that data into html. Here is my javascript code:
var HttpClient = function() {
this.get = function(aUrl, aCallback) {
var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
var anHttpRequest = new XMLHttpRequest();
anHttpRequest.onreadystatechange = function() {
if (anHttpRequest.readyState == 4 && anHttpRequest.status == 200)
aCallback(anHttpRequest.responseText);
}
anHttpRequest.open( "GET", aUrl, true );
anHttpRequest.send( null );
}
}
var client = new HttpClient();
client.get('https://catfact.ninja/fact', function(response) {
var vsplit = response.split("\"")
console.log(vsplit[3]);
$('body').html(document.write(vsplit[3]));
});
Thanks for any help, sorry if I seem dumb
The first issue you have is that the call to document.write in the html function will not produce the results you think. document.write is a synchronous write function that tries to inject a string into the DOM renderer at the point it's called. If you remove that, you should have more luck seeing something in the HTML, but you can also use the following.
The response from https://catfact.ninja/fact is the following.
{"fact":"Cats' eyes shine in the dark because of the tapetum, a reflective layer in the eye, which acts like a mirror.","length":109}
There's no need to split the response when the format is JSON. You can use JSON.parse to create a Javascript Object. For example.
// data will contain data.fact, and data.length
var data = JSON.parse(response);
// Without using jQuery, you can set the html of the body directly
var body = document.getElementsByTagName("body")[0];
body.innerHTML = data.fact;
This is regarding passing an array to a php page.Is it possible to send an array like this(code below)? if its not possible , what changes should i bring about to my code?
function ajax_post(){
var hr = new XMLHttpRequest();
hr.open("POST", "get_numbers.php", true);
hr.setRequestHeader("Content-type", "application/json");
hr.onreadystatechange = function() {
if(hr.readyState == 4 && hr.status == 200) {
var data = JSON.parse(hr.responseText);
var results=document.getElementById("ace");
//results.innerHTML=data.u1.port;
for (var obj in data)
{
results.innerHTML+=data[obj].port;
}
}
}
var cards= new Array();
cards[0]="hearts";
cards[1]="spades";
hr.send(cards);
results.innerHTML = "processing...";
}
.send() doesn't take a javascript array. There are a number of forms of data you could send and you will have to decide which form is appropriate, but an array is not one of them. The simplest would be to turn the array into a JSON string and send that.
var cards = [
"hearts",
"spades"
];
hr.send(JSON.stringify(cards));
Then, on the receiving end of things, you would parse the JSON back into whatever language form you are using on the server end. If it's PHP, then you can use the PHP functions for parsing the JSON which will put the data into a PHP array on your server.
Per the MDN doc page for the XMLHttpRequest object, .send() can take the following types of data:
void send();
void send(ArrayBufferView data);
void send(Blob data);
void send(Document data);
void send(DOMString? data);
void send(FormData data);
Using JSON would be using the string type.
I am trying to call a Hessian web service from a Javascript application, but I'm having issues parsing the response, since jQuery is treating the response as text and stripping the first bytes of it.
In my research, I have found out that you need to set the charset as 'charset=x-user-defined' in order to the browser leave my bytes as is. But, according the ajax docs:
Sending Data to the Server
By default, Ajax requests are sent using the GET HTTP method. If the
POST method is required, the method can be specified by setting a
value for the type option. This option affects how the contents of the
data option are sent to the server. POST data will always be
transmitted to the server using UTF-8 charset, per the W3C
XMLHTTPRequest standard.
And indeed, the charset is not changing regardless of the settings I used. I have tried the following, separately and all at once, with no luck
$.ajax({
type : 'POST',
url : url,
timeout : 3000,
data : parameters,
contentType : "x-application/hessian; charset=x-user-defined'",
mimeType: 'text/plain; charset=x-user-defined',
headers: {
Accept : "text/plain; charset=x-user-defined",
"Content-Type": "text/plain; charset=x-user-defined"
},
beforeSend : function(xhr) {
xhr.overrideMimeType("text/plain; charset=x-user-defined");
}
})
Also I tried to mess around with the data converters and custom contenttypes defined in jQuery, with no succes.
It appears that as per the standard, I will not be able to do this. It works with GET but not with POST, and the Hessian protocol requires POST.
Do you have any ideas? Or do I need to start to build my XHR method form scratch?
Turns out that I was making a silly mistake somewhere else. But anyhow, I found a sweet way for handling binary data on request and responses, from here.
define(function() {
// Do setup work here
function configurationException(message) {
throw new Error(message + " missing from configuration object");
}
return {
post : function(config) {
if (config) {
var url = config.url || configurationException("url");
var done = config.done || configurationException("callback function");
var timeout = config.timeout || 10000;
var data;
if (config.data) {
data = config.data;
} else {
data = null;
console.warn('No data is specified in binaryPost');
}
var request = new XMLHttpRequest();
request.open("POST", url, true);
request.responseType = "arraybuffer";
request.setRequestHeader("Content-Type", "x-application/hessian;");
request.onload = function(oEvent) {
var arrayBuffer = request.response; // Note: not oReq.responseText
if (arrayBuffer) {
var byteArray = new Uint8Array(arrayBuffer);
done(byteArray);
}
};
request.send(data);
} else {
throw new Error("Configuration object is missing");
}
}
};
});
Hope you find it useful