I am trying to fetch a part of the page from another domain. I could directly embed as a
frame. But i need to retrieve a part of it. How can i? I use:
$.ajax({
type: "POST",
url: "marketToday.php",
data: "symbol=" + symbol,
success: function(html)
{
alert(html);
}
});
in marketToday.php:
I retrieve a page using curl
PHP has built-in libraries (usually included by default) for DOM manipulation. Essentially you would need to use curl or file_get_contents() and then parse the source code with DOM or XPATH.
Related
I was asked in an interview what are the methods in AJAX other than GET and POST. I googled but I couldn't find any . Could someone please tell me.
HEAD Same as GET but returns only HTTP headers and no document body
PUT Uploads a representation of the specified URI
DELETE Deletes the specified resource
OPTIONS Returns the HTTP methods that the server supports
These are generally used methods
Also see detail about
There are four types of calls you cand do to a REST API GET,POST,PUT and DELETE. PUT should be suposedly used to modify already existing data while DELETE should be used to eliminate data. Still due to convention, PUT and DELETE are barely used. Here are a couple of examples of PUT and DELETE Ajax calls
$.ajax({
url: urlCalltoDeleteResource),
type: 'DELETE',
success: function(data) {
alert('Deleted');
},
error: function(data) {
alert('Not Deleted');
},
});
$.ajax({
url: urlToUpdate,
type: 'PUT',
data: "name=NameToUpdate",
success: function(data) {
alert('Load was performed.');
}
});
I use this code to store and retrieve ajax data via http://openkeyval.org/
$.ajax({ /* send data */
url: "http://api.openkeyval.org/store/",
data: "test-key-data=" + JSON.stringify([123,456]),
dataType: "jsonp",
success: function(data){
console.log(data);
}
});
$.ajax({ /* retrieve data */
url: "http://api.openkeyval.org/test-key-data",
dataType: "jsonp",
success: function(data){
console.log(data);
}
});
everything work fine in Chrome javascript console but in userscript I get error like this
Uncaught ReferenceError: jQuery110208458673823624849_1375932537303 is
not defined
I try to use GM_xmlhttpRequest to retrieve data like this
GM_xmlhttpRequest({
method: "GET",
url: "http://api.openkeyval.org/test-key-data",
onload: function(response) {
console.log(response.responseText);
}
});
but it seem like openkeyval doesn't accept data via POST/GET method and log result was like when you access it directly from url of browser like this
{"error":"not_found","documentation_url":"http://openkeyval.org/"}
I include jQuery and it work fine with this code
// #require http://code.jquery.com/jquery-latest.min.js
I try to use Greasemonkey/jQuery XHR bridge with out change other code by like this
// #require http://courses.ischool.berkeley.edu/i290-4/f09/resources/gm_jq_xhr.js
and try use openkeyval official javascript library with code like this
// #require http://cdn.openkeyval.org/statics/openkeyval.packed.js
and retrieve data with code like this
var ourCallback = function(value, key) {
console('The value of ' + key ' + is ' + value);
};
window.remoteStorage.getItem('test-key-data', ourCallback);
still got error ERROR: Unexpected string
Please help, I mess with it more than 10 hours. Thank you so much.
It look like $.ajax always trigger error event function
but GM_xmlhttpRequest can retrieve mistype data, so I try looking for dataType: "jsonp" in GM_xmlhttpRequest and I got that jsonp header content-type is "application/javascript" OR "application/json" and the first one work well.
my new code for retrieve data look like this
GM_xmlhttpRequest({
method: "GET",
url: "http://api.openkeyval.org/test-key-data?nocache=" + new Date(),
headers: {
"Content-Type": "application/javascript"
},
onload: function(response) {
console.log(response.responseText);
}
});
and retrieve data using $.ajax even it always trigger error event function but it still send data.
I try both content-type on GM_xmlhttpRequest and still not work.
my code to store data look like this
$.ajax({ /* send data */
url: "http://api.openkeyval.org/store/",
data: "test-key-data=" + JSON.stringify(myVarObject),
dataType: "jsonp"
});
Add this into $.ajax({...})
crossDomain: true;
It is because by default cross domain ability is disabled. See http://api.jquery.com/jQuery.ajax/
EDIT:
Sometimes there will be a issue with different charset between local script and remote script. Try using:
scriptCharset: "utf-8";
Also look at JQuery AJAX is not sending UTF-8 to my server, only in IE
Elaborating my comment
The reference is to the callback function generated by jquery.
It Sounds to me the way you invoke your userscript unloads the jquery functions before the callback is executed.
Perhaps you use a link and forgot the preventDefault?
If you ajax and have
$("#linkid").on("click"
or
$("#formid").on("submit"
it is MANDATORY to continue like this:
,function(e) {
e.preventDefault();
Otherwise the link is followed or the form is submitted which may not have any visible effect, but the asynchronous scripts have been (partially) unloaded unless the form and link has a target other than the current window
I was trying to get some information from another server using ajax post call as .
$.ajax({
type: 'POST',
url: testURL,
data: data,
//dataType: 'jsonp',
dataType: "script",
success: function (data) {
alert("Successfully posted (Test) : " + data);
},
error: function (ts) {
alert("Inside Error : " + ts.responseText);
}
});
Here testURL is the URL where i am posting the data (Cross domain requests are only possible if datatype is either jsonp or script), and it suppose to return text/html data back (what fiddler says will be the return type for the data).
I am not sure if i can use any proxy as pages are normal HTML pages.
Isn't there any way to get the [data] as text (as for now success expecting JASONP data and alert("Successfully posted (Test) : " + data); only showing data as undefined). I can't make any changes to API or whatever it is on the remote Server.
Thanks for the help in advance.
Regards
Without a proxy you cannot do it. If that is in a windows box, you can create a COM object to make the call to that server and from your JavaScript you call that COM.
UPDATE:
Well it seems you can with JSONP
jsonp with jquery
I like to create a custom module in which I have a select list which on change has to select data from db and show the data.
How can I give the url in the ajax call in my module's helper function?
You create a module with a custom position then you load your module in a new article.
Every article has an ID and an ALIAS.So the url will be like that
http://myurl.gr/ID-ALIAS.html?tmpl=component&type=raw
For more details check the below link:
How to load a custom html module using ajax-call joomla 2.5
You can use something like this :
function datadelete(id){
var dataString = 'id='+ id;
$.ajax({
type: "POST",
url: "index.php?option=componentname&task=deleteecontacts&type=ajax",
data: dataString,
cache: false,
success: function(msg)
});
}
I hope this will give you an idea about how to pass URL in Ajax call using Jquery
I am new to ajax so maybe this is obvious. I've tried many different not-working approaches. I have javascript that when you click on a button:
an ajax call that grabs some data from a controller - returns an object
display that data in a template that I will show on the page
Here is the javascript/ajax:
<script type="text/javascript">
$("#show").click(function () {
$.ajax({ url: '/Myproject/result/index',
type: "POST",
data: { id: id},
success: function(result) {
alert("Success:" + result); // Can see getting object back.
}});
$(".resulttable").show();
});
Here is the key line in grails view template:
<g:each in="${allResults}" status="i" var="result">
How do I get the data from the javascript to the gsp code (ie allResults)?
Do I have to "refresh" this template to display new data?
thanks.
You just can't make your javascript/jquery code populate things in the gsp, since the gsp is processed server-side and javascript is processed client-side, after the gsp rendered all html documents and populated them with your model. You need to be aware that your page was already processed, so things like ${variables} won't be reloaded anymore. So when you do this:
$(".resulttable").show();
It's not gonna show the result you're waiting for. You have to use javascript code to reload your result table.
So if you're using ajax here, you should use the function success to alter your html table via javascript/jquery since you already have the response you wanted. Maybe this read can help you. Oh, and I think it would be better if in your ajax call, you would define a dataType (json works great in your case), like this:
$("#show").click(function () {
$.ajax({ url: '/Myproject/result/index',
type: "POST",
data: { id: id},
dataType: 'json',
success: function(result) {
alert("Success:" + result); // Can see getting object back.
}});
$(".resulttable").show();
});
Just to make clear what kind of response you're getting from the controller.
You do not need to write your ajax calls the hard way. There are some Grails intern tags you can use inside your html:
http://grails.org/doc/latest/ref/Tags/remoteFunction.html
http://grails.org/doc/latest/ref/Tags/submitToRemote.html
http://grails.org/doc/latest/ref/Tags/remoteLink.html
Following the links you will find some nice examples...