I have a situation where I want to hit a button in the GSP (actionSubmit) and update a div when I finish the call (which includes a call to a javascript function). I want to ultimate end up in the controller rendering the searchResults parameter and the div with the results (which is currently working).
Problem is, I need to (presumably) wrap my actionSubmit in a remoteForm. But how do I:
1) Run the javascript method already existent in the onClick
2) Render the page in the controller.
If I try both wrapped in a controller, I finish the remoteForm action and the javascript action "hangs" and never finishes.
Any ideas?
List.gsp
<g:actionSubmit type="button" value="Ping All" onclick="getIds('contactList');"/>
function getIds(checkList)
{
var idList = new Array();
jQuery("input[name=" + checkList + "]:checked").each
(
function() {
idList.push(jQuery(this).val());
}
);
$.ajax({
url: "pingAll",
type:"GET",
data:{ids:JSON.stringify(idList)}
});
}
controller:
def pingAll() {
String ids = params.ids
if(ids == "[]") {
render(template:'searchResults', model:[searchResults:""])
return
}
def idArray = contactService.formatIDString(ids)
idArray.each {
def contactInstance = Contact.get(Integer.parseInt(it))
emailPingService.ping(contactInstance)
}
/**
* Added this on 3/13. Commented out line was initial code.
*/
def searchResults = contactSearchService.refactorSearchResults(contactSearchService.searchResults)
render(template:'searchResults', model:[searchResults:searchResults, total:searchResults.size()])
}
You have a couple options:
1) You can avoid using the Grails remote tags (formRemote, remoteField, etc.), and I really encourage you to explore and understand how they work. The Grails remote tags are generally not very flexible. The best way to learn how they work is to just write some sample tags using the examples from the Grails online docs and then look at the rendered page in a web browser. All the tags do generally speaking are output basic html with the attributes you define in your Grails tags. Open up your favorite HTML source view (i.e. Firebug) and see what Grails outputs for the rendered HTML.
The reason I say this is because, the code you've written so far somewhat accomplishes what I've stated above, without using any GSP tags.
g:actionSubmit submits the form you are working in using the controller action you define (which you haven't here, so it runs the action named in your value attribute). However, you also have an onClick on your actionSubmit that is running an AJAX call that also submits data to your pingAll action. Without seeing the rest of your code and what else is involved in your form, you are submitting your form twice!
You can simply just not write actionSubmit, and simply do an input of type button (not submit) with an onClick. Then in your javascript function that runs, define a jQuery success option for your AJAX call
$.ajax({
url: "pingAll",
type:"GET",
data:{ids:JSON.stringify(idList)},
success:function(data) {
$('#your-updatedDiv-id-here').html(data);
}
});
2) If you want to use the GSP tags, I think you are using the wrong one. Without knowing the full extent of your usage and form data involved, it looks like g:formRemote, g:submitToRemote, and g:remoteFunction could serve your purposes. All have attributes you can define to call javascript before the remote call, as well as defining a div to update and various event handlers.
Related
I have a custom template tag that returns suppose name of a student and roll number if passed as an argument id of the student.
#register.inclusion_tag('snippet/student_name.html')
def st_name_tag(profile, disp_roll=True, disp_name=True):
#some calculations
return {'full_name':student.name,
'roll':student.roll_number,
}
The template(included) consists of some Html file which is written in a single line(to avoid unterminated string literal error from js).
I simply want to call the st_name_tag from inside the JS function.
My JS looks like:
{% load profile_tag %}
<script type = "text/javascript">
eventclick : function(st){
var div = ('<div></div>');
var st_id = st.id;
if (st.status == 'pass'){
div.append('<p>Student Name:{% st_name_tag '+st_id+' %}</p>');
}
}
So far I tried the above method along with removing the + and '' signs from st_id varaible. That hasnt helped me at all. Help Please!
You are trying to render a template based on the interaction by user. The first happens on the server (server-side as it is often referred to), and the latter happens on the user's browser.
The order that these happen is first to render the template on server, send and present in browser, then user interacts with js. Because of this fact, as I mentioned in the comment, it is not possible to affect the template rendered within javascript.
I would recommend you to use ajax in order to accomplish this. Whenever an iteraction occurs, you asynchronously make a request to the server to present you with new data.
Well i wanna create an Ajax Drag and Drop Shopping cart using only javascript and ajax. Currently i'm using the example in this page as a stepping stone. Right now it's only with local jquery and it works fine but i want to make the cart work with ajax calls. Note that i do not want to use a server side language( like php, rubby, asp etc), only html and javascript.
My initial thought was that at the $(".basket").droppable i should add an ajax call to another html page containing the "server logic" in javascript, execute in that file all the necessary steps( like reading the get variables (product name, product id and quantity), set a cookie and then return an ok response back. When the server got the "ok" response it should "reload" the cart div with the updated info stored inside the cookie.
If this was with php i would know how to do it. The problem is that as far as i know, you can execute javascript once it reaches the DOM, but how can you execute that js from inside the page that isbeing called upon ? ( thanks to Amadan for the correction)
I've thought about loading the script using $.getScript( "ajax/test.js", function( data, textStatus, jqxhr ).. but the problem with that is that the url GET variables i want to pass to the "server script" do not exist in that page.
I havent implemented all the functionality yet as i am stuck in how to first achieve javascript execution inside an ajax target page.
Below is a very basic form of my logic so far
// read GET variables
var product = getQueryVariable("product");
var id = getQueryVariable("id");
var quantity= getQueryVariable("quantity");
//To DO
//--- here eill go all the logic regarding cookie handling
function getQueryVariable(variable) {
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
if (pair[0] == variable) {
return pair[1];
}
}
alert('Query Variable ' + variable + ' not found');
}
Any help regarding this matter will be appreciated.
Note: Logic in simple words:
1)have an html page with products+cart
2)Have an "addtocart.html" with the "Cart Server Logic"( being the target of the ajax call when an item is dropped into the product.)
If you have some other idea on this, please enlighten me :)
thanks in advance
Foot Note-1:
if i try loading the scipt using
$("#response").load("ajax/addtocart.html?"+ $.param({
product: product,
id: id,
quantity:quantity
})
);
i get the alert about not being able to find the url parameters( something that i thing is normal as because the content is being loaded into the initial page, from which the request is started, there are no get parameters in the url in the first place)
The problem is that as far as i know, you cannot execute javascript contained in the target of an ajax call, as that page never reaches the browser interpreter.
This is either incorrect or misleading. The browser will execute any JavaScript that enters DOM. Thus, you can use $.load to load content and execute code at the same time. Alternately, you can use hacked JSONP to both execute code and also provide content as a JSON document.
EDIT: Yes, you can't get to the AJAX parameters from JavaScript. Why do you want to? Do you have a good reason for it, or is it an XY problem?
The way I'd do it is this:
$('#response').load(url, data, function() {
onAddedToCart(product, id, quantity);
});
and wrap your JS code in your HTML into the onAddedToCart function.
Depending on what exactly you're doing, it could be simplified even further, but this should be enough to cover your use case.
I have a basic html file which is attached to a java program. This java program updates the contents of part of the HTML file whenever the page is refreshed. I want to refresh only that part of the page after each interval of time. I can place the part I would like to refresh in a div, but I am not sure how to refresh only the contents of the div. Any help would be appreciated. Thank you.
Use Ajax for this.
Build a function that will fetch the current page via ajax, but not the whole page, just the div in question from the server. The data will then (again via jQuery) be put inside the same div in question and replace old content with new one.
Relevant function:
http://api.jquery.com/load/
e.g.
$('#thisdiv').load(document.URL + ' #thisdiv');
Note, load automatically replaces content. Be sure to include a space before the id selector.
Let's assume that you have 2 divs inside of your html file.
<div id="div1">some text</div>
<div id="div2">some other text</div>
The java program itself can't update the content of the html file because the html is related to the client, meanwhile java is related to the back-end.
You can, however, communicate between the server (the back-end) and the client.
What we're talking about is AJAX, which you achieve using JavaScript, I recommend using jQuery which is a common JavaScript library.
Let's assume you want to refresh the page every constant interval, then you can use the interval function to repeat the same action every x time.
setInterval(function()
{
alert("hi");
}, 30000);
You could also do it like this:
setTimeout(foo, 30000);
Whereea foo is a function.
Instead of the alert("hi") you can perform the AJAX request, which sends a request to the server and receives some information (for example the new text) which you can use to load into the div.
A classic AJAX looks like this:
var fetch = true;
var url = 'someurl.java';
$.ajax(
{
// Post the variable fetch to url.
type : 'post',
url : url,
dataType : 'json', // expected returned data format.
data :
{
'fetch' : fetch // You might want to indicate what you're requesting.
},
success : function(data)
{
// This happens AFTER the backend has returned an JSON array (or other object type)
var res1, res2;
for(var i = 0; i < data.length; i++)
{
// Parse through the JSON array which was returned.
// A proper error handling should be added here (check if
// everything went successful or not)
res1 = data[i].res1;
res2 = data[i].res2;
// Do something with the returned data
$('#div1').html(res1);
}
},
complete : function(data)
{
// do something, not critical.
}
});
Wherea the backend is able to receive POST'ed data and is able to return a data object of information, for example (and very preferrable) JSON, there are many tutorials out there with how to do so, GSON from Google is something that I used a while back, you could take a look into it.
I'm not professional with Java POST receiving and JSON returning of that sort so I'm not going to give you an example with that but I hope this is a decent start.
You need to do that on the client side for instance with jQuery.
Let's say you want to retrieve HTML into div with ID mydiv:
<h1>My page</h1>
<div id="mydiv">
<h2>This div is updated</h2>
</div>
You can update this part of the page with jQuery as follows:
$.get('/api/mydiv', function(data) {
$('#mydiv').html(data);
});
In the server-side you need to implement handler for requests coming to /api/mydiv and return the fragment of HTML that goes inside mydiv.
See this Fiddle I made for you for a fun example using jQuery get with JSON response data: http://jsfiddle.net/t35F9/1/
Usefetch and innerHTML to load div content
let url="https://server.test-cors.org/server?id=2934825&enable=true&status=200&credentials=false&methods=GET"
async function refresh() {
btn.disabled = true;
dynamicPart.innerHTML = "Loading..."
dynamicPart.innerHTML = await(await fetch(url)).text();
setTimeout(refresh,2000);
}
<div id="staticPart">
Here is static part of page
<button id="btn" onclick="refresh()">
Click here to start refreshing every 2s
</button>
</div>
<div id="dynamicPart">Dynamic part</div>
$.ajax(), $.get(), $.post(), $.load() functions of jQuery internally send XML HTTP request.
among these the load() is only dedicated for a particular DOM Element. See jQuery Ajax Doc. A details Q.A. on these are Here .
I use the following to update data from include files in my divs, this requires jQuery, but is by far the best way I have seen and does not mess with focus. Full working code:
Include jQuery in your code:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
Create the following function:
<script type="text/javascript">
function loadcontent() {
$("#test").load("test.html");
//add more lines / divs
}
</script>
Load the function after the page has loaded; and refresh:
<script type="text/javascript">
$( document ).ready(function() {
loadcontent();
});
setInterval("loadcontent();",120000);
</script>
The interval is in ms, 120000 = 2 minutes.
Use the ID you set in the function in your divs, these must be unique:
<div id="test"></div><br>
I have a script that loads the code dynamically. It is kind of a search engine. When I press a search button, the action gets triggered and a new page opens with many parameters.
I want to override one of the parameters generated with the script in the new URL. JS code is quite big and hard to read, but I have found the important part in the Firebug DOM editor.
This is the pattern of the URL generated when you perform the search:
http://www.example.com/...?ParameterOne=123&ParameterTwo=Two&ThisParameter=Sth&ParameterFour=Four...
What I want to edit is "ThisParameter" and change its value. This is the part edited in the DOM that does what I want:
Foobar = {
_options: [],
...
var options = {"ParameterOne":123,"ParameterTwo":"Two","ThisParameter":"ABC","ParameterFour":Four,...}
...
And this is the output of "ThisParameter" when you choose "Copy path" in Firebug's DOM tab:
_options[0].ThisParameter
I am wondering it this is possible at all. What makes me think that it is, is the fact that I can change this parameter in Firebug and it works perfectly. So, if Firebug can edit it, there should be a way to influence it with another script.
Looking forward to any suggestions, thank you in advance!
Since you cannot edit the dynamic script you have the following options:
You have to try to give the script the correct input and hope it uses your value.
Add a script to the results page which will read the url and arguments, change it and redirect, as we discussed here. (If you put everything in functions it should not conflict with the dynamic script if the functions are uniquely named.)
You could try adding something like this jQuery code to the page with the search button:
$('input[name=search_button_name]').click(function(e) {
e.preventDefault();
var form_search = $('#search_form_id');
$('<input>').attr({
type: 'hidden',
name: 'ThisParameter',
value: 'SomethingElse'
}).appendTo(form_search);
f.submit();
});
You can override any js function and method, or wrap you code around it. The easiest thing would be to look at the code you get and once it gets loaded, you re-declare a method with your own functionality.
I you are trying to replace a parameter in a specific jquery request, you can even wrap around the jquerys ajax method:
var jquery_ajax = $.ajax
$.ajax = function(options){
// parse only a specific occurence
if(options.url.indexOf("example.com") > -1) {
// change the url/params object - depending on where the parameter is
options.params.ThisParameter = "My Custom value"
}
// call the original jquery ajax function
jquery_ajax(options);
}
But it would be a lot cleaner to override the method that builds the ajax request rather than the ajax request itself.
I would investigate further on the scope of the variable options (var options), is it global? i.e. if you type 'options' in the Firebug console, does it display its properties?
If so, you could then access it via your own script and change is value, e.g.
options.ThisParameter = 'my-own-value';
You might hook your script to the click event of the search button.
I hope this helps, it could be more specific maybe if you have some sample code somewhere.
There is a similar post Retrieving HTTP status code from loaded iframe with Javascript but the solution requires the server-side to return javascript calling a function within the iframe. Instead, I would simply like to check the HTTP status code of the iframe without having to call a function within the iframe itself since my app either returns the full site through HTML or the single object as JSON. Essentially I've been trying to implement a callback method which returns success|failure dependent upon the HTTP status code.
Currently I have uploadFrame.onLoad = function() { ... so far pretty empty ... } and I am unsure what to check for when looking for HTTP status codes. Up until now, I've mainly relied upon jQuery's $.ajax() to handle success|failure but would like to further understand the mechanics behind XHR calls and iframe use. Thanks ahead of time.
UPDATE
The solution I came up with using jQuery
form.submit(function() {
uploadFrame.load(function() {
//using eval because the return data is JSON
eval( '(' + uploadFrame[0].contentDocument.body.children[0].innerHTML + ')' );
//code goes here
});
});
I think the best solution is injecting <script> tag into your iframe <head> and insert your "detecting" javascript code there.
something like this:
$('#iframeHolderDivId').html($.get('myPage.php'));
$('#iframeHolderDivId iframe head').delay(1000).append($('<script/>').text('your js function to detect load status'));
Maybe it's not the best solution but I think it works