I have a program that was working before and when I ran it today, the post seems to not be getting to the server. I added an alert to debug, and it runs successfully. Here is the JQuery code:
$(document).ready(function() {
$("#submit").click(function(d) {
d.preventDefault();
var data = {"message" : $("#theText").val()};
alert($("#theText").val());
$.ajax({
type: "POST",
url: "/post",
processData: false,
contentType: "application/json",
data: JSON.stringify(data),
dataType: text
});
});
});
It is being passed into an Express route that just looks like this:
app.post("/post", log, dc);
It does not show up on the logger at all, and even if I change it to something like this it still doesn't print:
app.post("/post", function(){
console.log("received post");
});
You are passing a named variable to dataType...should be a string like 'json' or 'text'. That is probably causing the primary error.
Related
how to send large base64 data Array using jQuery Ajax. Here is my code :
$.ajax({
type: "POST",
url: "addPhoto.php",
data:{photosArray:photosArray},
dataType: "json",
success: function(data) {
$(data).each(function(){
...
});
}
});
photosArray contains between 3 and 12 very long strings like :
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAMAAAC6V+0...
Is there any limit for POST data size in Ajax?
Open your php.ini file and find the line stating upload_max_filesize. The default it set to 2M, which is 2MB. Try increasing it to 3MB and see if you are still receiving the error.
And use
"cache": false
Is your data properly declared ? It can be either String, object or array. try following
$.ajax({
type: "POST",
url: "addPhoto.php",
data:"{photosArray:photosArray}",
dataType: "json",
success: function(data) {
$(data).each(function(){
...
});
}
});
I have an AJAX script like this
function savetoDB(inp) {
var userID = (FB.getAuthResponse() || {}).userID;
jQuery.ajax({
url: URL,
type: 'GET',
data:{ 'input': JSON.stringify(inp) },
contentType: 'application/json; charset=utf-8',
dataType: 'json',
async: true,
success: function(msg) {
console.log(msg);
alert(msg);
}
});
}
The problem I am facing is that the php returns (echo's) some string , but I am unable to see it in alert.
I used the inspect element and Inside inspect element I can see the Response, and also the status is 200, what could be the reason that it is not showing the response in alert?
You are returning a JSON object, so it won't show in alert, which only displays strings. Convert it to a string first:
success: function(msg) {
console.log(msg);
alert(JSON.stringify(msg));
}
Replace "URL" with the actual url of file you're extracting data from otherwise you'll get an empty response as is the case.
ok i'm that far:
app.get('/mypartial', function (req. res) {
res.render('mypartial', {layout: false, data: data});
});
this renders out my jade with the data and sends it as html to the client
now i need to fetch this via js and to render it out using
$('#idofparentelementofyourpartial').html(responseHTML);
so i would need something like:
//// Pseudocode
var locat = window.location.pathname;
on locat change{
prevent default // because i want to use the ajax call (not standart browser call)
ajax({
url: locat,
type: "GET",
dataType: "json",
success: $('#idofparentelementofyourpartial').html(data);
});
}
the strange thing is that "layout: false" still trys to render something: i would expect that it just puts stuff into the dom
You may have a look at jQuery load() to load partial html into a defined container.
ajax({
url: locat,
type: "GET",
dataType: "json",
success: $('#idofparentelementofyourpartial').html(data);
});
Datatype JSON is not what you want.
I have a JSON response coming from REST web service and want to bind that data to html using jQuery. Looks like its not even hitting web service url which I have provided in my jquery.
Url is working fine which gives me JSON data in browser but jQuery I am using unable to get any content from this. I am pasting my code here, plz let me know if some one can help.
While debugging script its directly going on error section in ajax call.
<script type="text/javascript">
$(document).ready(function () {
GetData();
});
function GetData() {
// alert(textblock.value);
$.ajax({
type: "GET",
url: "http://localhost:8092/api/Employees",
data: "{'employeeId'= '" + 1234 + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
var results = $.parseJSON(msg.d);
alert(msg);
alert(results);
},
error: function (result) {
alert('here');
var tt = result.text;
alert(tt);
}
});
}
</script>
finally i am able to get data now.
I added below properties in $.ajax:
processData: false,
async: false,
I have the following but it's not working, I read somewhere on the stackoverflow that it works like this but I can't seem to get it to work.. it errors... am I doing something wrong?
If I do pass data like this - it works -- so I know my service is working
//THIS WORKS
data: "{one : 'test',two: 'test2' }"
// BUT SETTING UP OBJECT doesn't work..
var saveData = {};
saveData.one = "test";
saveData.two = "tes2";
$.ajax({
type: "POST",
url: "MyService.aspx/GetDate",
data: saveData,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert(msg.d);
},
error: function(msg) {
alert('error');
}
});
I believe that code is going to call .value or .toString() on your object and then pass over the wire. You want to pass JSON.
So, include the json javascript library
http://www.json.org/js.html
And then pass...
var saveData = {};
saveData.one = "test";
saveData.two = "tes2";
$.ajax({
type: "POST",
url: "MyService.aspx/GetDate",
data: JSON.stringify(saveData), // NOTE CHANGE HERE
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert(msg.d);
},
error: function(msg) {
alert('error');
}
});
According to this blog post, the reason it doesn't work when you try to pass the object is that jQuery attempts to serialize it. From the post:
Instead of passing that JSON object through to the web service, jQuery will automatically serialize and send it as:
fname=dave&lname=ward
To which, the server will respond with:
Invalid JSON primitive: fname.
This is clearly not what we want to happen. The solution is to make sure that you’re passing jQuery a string for the data parameter[...]
Which is what you're doing in the example that works.
My suggestion would be to use the jquery-json plug-in and then you can just do this in your code:
...
data: $.toJSON(saveData),
...