I have a Extension method in my html helper class to render an Autocomplete. This works fine with aspx view engine in VS2008 & VS2010. The Autocomplete class has an overloaded ToString() method which outputs Raw Html.
However when i use Razor engine i don't get any visible output. Firebug shows the output of Extension method is Html Encoded as follow :(with all <, >..)
<input class="AutoComplete" id="p_ename" name="p_ename" style="width: 190px" type="text" valuefield="p_empid"></input> <input id="p_empid" name="p_empid" type="hidden"></input>
<script type='text/javascript'>$('#p_ename').autocomplete('/UserMst/GetEmployee', { dataType: 'json', scroll: true, parse: function(item, event) { $('#p_empid').val(''); var array = new Array(); if(item) for (var i = 0; item[i]; i++ ) { array[array.length] = { data: item[i], value: item[i], result: unescape(item[i].Text) }; } return array; }, formatItem: function(row) { return unescape(row.Text); } }).result(function(event, item, formatted) { $('#p_empid').val(item.Value); }).keyup(function() { if (window.event.keyCode != 13 && window.event.keyCode != 16 && window.event.keyCode != 20 && window.event.keyCode != 9 && window.event.keyCode != 27 && !(window.event.keyCode >= 112 && window.event.keyCode <= 123) && !(window.event.keyCode >= 37 && window.event.keyCode <= 40)) { $('#p_empid').val(''); } });
</script>
And this is how I call the method :
#Html.AutocompleteFor(m => m.p_empid, m => m.p_ename)
.setUrl(VirtualPathUtility.ToAbsolute("~/UserMst/GetEmployee"))
.setClass("AutoComplete").setStyle("width: 190px")
How do i fix this to work with Razor in MVC3 ?
Thanks
Make sure you return an MvcHtmlString by using following:
public static MvcHtmlString HiText(this HtmlHelper obj) {
string code = "<p>hi</p>";
return MvcHtmlString.Create(code);
}
Ok ! This is how i got it to work for now. Dont know whether it is a good solution or not. Posting the fix here for others who are facing the same problem.
i renamed the ToString() override method to MvcHtmlString ToHtml() and returned MvcHtmlString.Create(result.ToString()) instead of raw html as string.
Now i have to call it as
#Html.AutocompleteFor(m => m.p_empid, m => m.p_ename)
.setUrl(VirtualPathUtility.ToAbsolute("~/UserMst/GetEmployee"))
.setClass("AutoComplete").setStyle("width: 190px").ToHtml()
Razor renders it properly now.
Related
I have a parent table with rows.
When they select a row, an AJAX call fires that returns the child details.
I have multiple text boxes showing child properties
<div class="row">
#Html.CheckBoxFor(m => m.Child.Property)
#Html.LabelFor(m => m.Child.Property)
</div>
but I can't see how to update the text boxes with the child I get back in AJAX results.
The best I've been able to do is manually updating each field from the 'complete' method. But I've got about 30 more fields to add and it feels like the wrong approach.
How do I bind the edit boxes to the returned model without using partials and without refreshing the entire page?
I added Child as a property in the #model, and the TextFor appears to bind properly. But of course
#Model.Child = child
does not. So they never show any data.
This question was based on a misunderstanding on my part. At first I deleted the question when I realized my mistake. I'm reinstating it because I think it is an easy mistake for a noobie to fall into and once you do, the answer is hard to sort out.
The problem is that #model no longer exists once the page is rendered. There is no data binding going on behind the scenes as I thought there was.
Your options are
populating the elements manually. (this will need editing to fit your particular elements)
function DisplayMergeSection(data) {
for (var key of Object.keys(data)) {
DisplayElement(data, key, "#Clients_");
}
}
function DisplayElement(data, key, prefix) {
return;
var val = data[key];
var valString = data[key + "String"];
var element = $(prefix + key)[0];
if (element && element.type === 'text') {
if ((val || '').toString().indexOf("Date(") > -1) {
var dtStart = new Date(parseInt(val.substr(6)));
element.value = moment(dtStart).format('MM/DD/YYYY');
} else {
element.value = val;
}
} else if (element && element.type === 'checkbox') {
element.checked = val;
} else if (element && element.type === 'select-one') {
element.value = valString;
} else if (element && element.nodeName === 'DIV') {
if ((val || '').toString().indexOf("Date(") > -1) {
var dtStart = new Date(parseInt(val.substr(6)));
element.innerText = moment(dtStart).format('MM/DD/YYYY');
} else {
element.innerText = val;
}
}
}
create a bunch of observables with knockout and then set up data binding. This is a lot cleaner.
https://knockoutjs.com/documentation/json-data.html
set up a mapping with the knockout plugin.
https://knockoutjs.com/documentation/plugins-mapping.html
I am trying to match a single aurelia validation to a bunch of properties in a form. E.g. every field with a property name of ssid in an array of objects that map to rows in a table. The validation docs say that the ensure clauses can have a property expression which sounds like what I need. I'm using the validation from
{ValidationRules, ValidationController} from 'aurelia-validation';
I've got validation working for a single property using
ValidationRules.ensure('apPwd').displayName('XY AP Password').maxLength(32).minLength(8).on(this);
where apPwd is the property expression.
But I can't find any spec for property expressions. Most examples in the aurelia docs just show a single property name. The most complicated I've seen are things piped together with | or & (whatever that is).
Can anyone point me to a spec or help with my specific problem? Or maybe I should just ditch this package and roll my own code?
I think this can help you out:
This is validate.ts
import { autoinject } from 'aurelia-framework';
import { ValidationRules, ValidationController } from 'aurelia-validation';
#autoinject
export class Validate {
numberField: number;
controller: any;
constructor (
private validationController: ValidationController
) {
this.controller = validationController;
ValidationRules.customRule(
'nummer',
(value, obj, min, max) => {
let numberValue: number = parseInt(value);
return value === null || value === undefined || Number.isInteger(nummer) && nummer >= min && nummer <= max;
},
`\${$displayName} must be an integer between \${$config.min} and \${$config.max}.`,
(min, max) => ({ min, max })
);
ValidationRules
.ensure((m: this) => m.numberField)
.required()
.withMessage('Rutan får inte vara tom.')
.satisfiesRule('nummer', 1, 100)
/*.satisfies((value: any, object?: any) => {
console.log(value);
if (value >= 1 && value <= 100) {
return true;
}
else {
return false;
}
})
.withMessage(`The number must be between - 100.`)*/
.ensure((m: this) => m.numberField).required()
.on(this);
}
submit(): void {
this.executeValidation();
}
executeValidation(): void {
this.controller.validate()
.then(errors => {
if (errors.length === 0) {
console.log('all good!');
} else {
console.log('all errors!');
}
});
}
}
And this is validate.pug (in my case, but you can use a html page if you like)
template
section.au-animate
h2 Validate
form(role="form")
.form-group
label Number
input#meetingSubject.form-control(type="text" value.bind="numberField & validate")
button.btn.btn-lg.btn-primary(click.delegate='submit()') Validate
div
h3 ${'latestValidationResult'}
ul(if.bind='controller.errors.length')
li(repeat.for='error of controller.errors') ${error.message}
Not sure if I understood your question, but I think you're looking for ensureObject:
ValidationRules
.ensureObject()
.satisfies(obj => {
return obj.property1 === 'test' && obj.property2.indexOf('test2') !== -1
})
.withMessage('Some error message.')
.on(this);
We have an ajax navigation menu which updates a dynamic include. The include files have each their own forms.
<h:form>
<h:commandButton value="Add" action="#{navigator.setUrl('AddUser')}">
<f:ajax render=":propertiesArea" />
</h:commandButton>
</h:form>
<h:panelGroup id="propertiesArea" layout="block">
<ui:include src="#{navigator.selectedLevel.url}" />
</h:panelGroup>
It works correctly, but any command button in the include file doesn't work on first click. It works only on second click and forth.
I found this question commandButton/commandLink/ajax action/listener method not invoked or input value not updated and my problem is described in point 9.
I understand that I need to explicitly include the ID of the <h:form> in the include in the <f:ajax render> to solve it.
<f:ajax render=":propertiesArea :propertiesArea:someFormId" />
In my case, however, the form ID is not known beforehand. Also this form will not be available in the context initally.
Is there any solution to the above scenario?
You can use the following script to fix the Mojarra 2.0/2.1/2.2 bug (note: this doesn't manifest in MyFaces). This script will create the javax.faces.ViewState hidden field for forms which did not retrieve any view state after ajax update.
jsf.ajax.addOnEvent(function(data) {
if (data.status == "success") {
fixViewState(data.responseXML);
}
});
function fixViewState(responseXML) {
var viewState = getViewState(responseXML);
if (viewState) {
for (var i = 0; i < document.forms.length; i++) {
var form = document.forms[i];
if (form.method == "post") {
if (!hasViewState(form)) {
createViewState(form, viewState);
}
}
else { // PrimeFaces also adds them to GET forms!
removeViewState(form);
}
}
}
}
function getViewState(responseXML) {
var updates = responseXML.getElementsByTagName("update");
for (var i = 0; i < updates.length; i++) {
var update = updates[i];
if (update.getAttribute("id").match(/^([\w]+:)?javax\.faces\.ViewState(:[0-9]+)?$/)) {
return update.textContent || update.innerText;
}
}
return null;
}
function hasViewState(form) {
for (var i = 0; i < form.elements.length; i++) {
if (form.elements[i].name == "javax.faces.ViewState") {
return true;
}
}
return false;
}
function createViewState(form, viewState) {
var hidden;
try {
hidden = document.createElement("<input name='javax.faces.ViewState'>"); // IE6-8.
} catch(e) {
hidden = document.createElement("input");
hidden.setAttribute("name", "javax.faces.ViewState");
}
hidden.setAttribute("type", "hidden");
hidden.setAttribute("value", viewState);
hidden.setAttribute("autocomplete", "off");
form.appendChild(hidden);
}
function removeViewState(form) {
for (var i = 0; i < form.elements.length; i++) {
var element = form.elements[i];
if (element.name == "javax.faces.ViewState") {
element.parentNode.removeChild(element);
}
}
}
Just include it as <h:outputScript name="some.js" target="head"> inside the <h:body> of the error page. If you can't guarantee that the page in question uses JSF <f:ajax>, which would trigger auto-inclusion of jsf.js, then you might want to add an additional if (typeof jsf !== 'undefined') check before jsf.ajax.addOnEvent() call, or to explicitly include it by
<h:outputScript library="javax.faces" name="jsf.js" target="head" />
Note that jsf.ajax.addOnEvent only covers standard JSF <f:ajax> and not e.g. PrimeFaces <p:ajax> or <p:commandXxx> as they use under the covers jQuery for the job. To cover PrimeFaces ajax requests as well, add the following:
$(document).ajaxComplete(function(event, xhr, options) {
if (typeof xhr.responseXML != 'undefined') { // It's undefined when plain $.ajax(), $.get(), etc is used instead of PrimeFaces ajax.
fixViewState(xhr.responseXML);
}
}
Update if you're using JSF utility library OmniFaces, it's good to know that the above has since 1.7 become part of OmniFaces. It's just a matter of declaring the following script in the <h:body>. See also the showcase.
<h:body>
<h:outputScript library="omnifaces" name="fixviewstate.js" target="head" />
...
</h:body>
Thanks to BalusC since his answer is really great (as usual :) ). But I have to add that this approach does not work for ajax requests coming from RichFaces 4. They have several issues with ajax and one of them is that the JSF-ajax-handlers are not being invoked. Thus, when doing a rerender on some container holding a form using RichFaces-components, the fixViewState-function is not called and the ViewState is missing then.
In the RichFaces Component Reference, they state how to register callbacks for "their" ajax-requests (in fact they're utilizing jQuery to hook on all ajax-requests).
But using this, I was not able to get the ajax-response which is used by BalusC's script above to get the ViewState.
So based on BalusC's fix, i worked out a very similar one. My script saves all ViewState-values of all forms on the current page in a map before the ajax-request is being processed by the browser. After the update of the DOM, I try to restore all ViewStates which have been saved before (for all forms which are missing the ViewState now).
Move on:
jQuery(document).ready(function() {
jQuery(document).on("ajaxbeforedomupdate", function(args) {
// the callback will be triggered for each received JSF AJAX for the current page
// store the current view-states of all forms in a map
storeViewStates(args.currentTarget.forms);
});
jQuery(document).on("ajaxcomplete", function(args) {
// the callback will be triggered for each completed JSF AJAX for the current page
// restore all view-states of all forms which do not have one
restoreViewStates(args.currentTarget.forms);
});
});
var storedFormViewStates = {};
function storeViewStates(forms) {
storedFormViewStates = {};
for (var formIndex = 0; formIndex < forms.length; formIndex++) {
var form = forms[formIndex];
var formId = form.getAttribute("id");
for (var formChildIndex = 0; formChildIndex < form.children.length; formChildIndex++) {
var formChild = form.children[formChildIndex];
if ((formChild.hasAttribute("name")) && (formChild.getAttribute("name").match(/^([\w]+:)?javax\.faces\.ViewState(:[0-9]+)?$/))) {
storedFormViewStates[formId] = formChild.value;
break;
}
}
}
}
function restoreViewStates(forms) {
for (var formIndexd = 0; formIndexd < forms.length; formIndexd++) {
var form = forms[formIndexd];
var formId = form.getAttribute("id");
var viewStateFound = false;
for (var formChildIndex = 0; formChildIndex < form.children.length; formChildIndex++) {
var formChild = form.children[formChildIndex];
if ((formChild.hasAttribute("name")) && (formChild.getAttribute("name").match(/^([\w]+:)?javax\.faces\.ViewState(:[0-9]+)?$/))) {
viewStateFound = true;
break;
}
}
if ((!viewStateFound) && (storedFormViewStates.hasOwnProperty(formId))) {
createViewState(form, storedFormViewStates[formId]);
}
}
}
function createViewState(form, viewState) {
var hidden;
try {
hidden = document.createElement("<input name='javax.faces.ViewState'>"); // IE6-8.
} catch(e) {
hidden = document.createElement("input");
hidden.setAttribute("name", "javax.faces.ViewState");
}
hidden.setAttribute("type", "hidden");
hidden.setAttribute("value", viewState);
hidden.setAttribute("autocomplete", "off");
form.appendChild(hidden);
}
Since I am not an JavaScript-expert, I guess that this may be improved further. But it definitely works on FF 17, Chromium 24, Chrome 12 and IE 11.
Two additional questions to this approach:
Is it feasible to use the same ViewState-value again? I.e. is JSF assigning the same ViewState-value to each form for every request/response? My approach is based on this assumption (and I have not found any related information).
Does someone expect any problems with this JavaScript-code or already ran into some using any browser?
I'll start off by stating that I don't know if this is possible at all, but I'm reading over the Kendo UI documentation and trying to figure out how to at least try it, but I'm running into a lot of difficulties with making a custom binding. This is a followup to another question I am still working on, which is posted here. If this is not an appropriate question, please kindly let me know, and I will close it or rephrase it. I'm just really lost and confused at this point.
As I understand it, based on what I've been told and tried, Kendo cannot bind to an Associative Array not because the data isn't good, but because it is an array of objects, each as a separate individual entity - under normal circumstances, an array would be a bit different and contain a length property, as well as some other functions in the array prototype that make iteration through it possible.
So I was trying to conjecture how to get around this. I succeeded in getting what I think was a workaround to function. I preface that with "think" because I'm still too inexperienced with Javascript to truly know the ramifications of doing it this way (performance, stability, etc)
Here is what I did;
kendo template
<script type="text/x-kendo-template" id="display-items-many">
# for(var key in data) { #
# if (data.hasOwnProperty(key) && data[key].hasOwnProperty("Id")) { #
<tr>
<td>
<strong>#= data[key].Id #</strong>
</td>
<td class="text-right">
<code>#= data[key].Total #</code>
</td>
</tr>
# } #
# } #
</script>
html
<table class="table borderless table-hover table-condensed" data-bind="source: Associative data-template="display-items-many">
</table>
Now to me, immediately off hand, this gave me the illusion of functioning. So I got to thinking a bit more on how to fix this ...
I want to create a new binding called repeat. The goal of this binding is as follows;
repeat the template for each instance of an object within the given root object that meets a given criteria
In my head, this would function like this;
<div data-template="repeater-sample" data-bind="repeat: Associative"></div>
<script type="text/x-kendo-template" id="repeater-sample">
<div> ${ data.Id }</div>
</script>
And the criteria would be a property simply called _associationKey. So the following would, in theory, work.
$.ajax({
// get data from server and such.
}).done(function(results){
// simple reference to the 'associative array' for easier to read code
var associative = results.AssociativeArray;
// this is a trait that everything in the 'associative array' should have to match
// this is purely, purely an example. Obviously you would use a more robust property
var match = "Id";
// go through the results and wire up the associative array objects
for(var key in associative ) {
if(associative.hasOwnProperty(key) && associative[key].hasOwnProperty(match)) {
associative[key]._associationKey = 10; // obviously an example value
}
}
// a watered down example implementation, obviously a real use would be more verbose
viewModel = kendo.observable({
// property = results.property
// property = results.property
associativeArray = associative
});
kendo.bind('body', viewModel);
});
So far this actually seems to work pretty well, but I have to hard code the logic in the template using inline scripting. That's kind of what I want to avoid.
Problem
The big issue is that I'm vastly confused on telerik's documentation for custom bindings (available here). I do have their examples to draw from, yes - but it's a bit confusing to me how it interacts with the object. I'll try to explain, but I'm so lost that it may be difficult.
This is what telerik gives for an example custom binding, and I've pruned it a bit for space concerns;
<script>
kendo.data.binders.repeater = kendo.data.Binder.extend({
init: function(element, bindings, options) {
//call the base constructor
kendo.data.Binder.fn.init.call(this, element, bindings, options);
var that = this;
// how do we interact with the data that was bound?
}
});
</script>
So essentially that's where I am lost. I'm having a big disconnect figuring out how to interact with the actual "associative array" that is bound using data-bind="repeat: associativeArray"
So ..
I need to interact with the bound data (the entire 'associative array')
I need to be able to tell it to render the target template for each instance that matches
Further Updates
I have been digging through the kendo source code, and this is what I have so far - by taking the source binding as an example... but I'm still not getting the right results. Unfortunately this poses a few problems;
some of the functions are internal to kendo, I'm not sure how to get access to them without re-writing them. While I have the source and can do that, I'd prefer to make version agnostic code so that it can "plug in" to newer releases
I'm totally lost about what a lot of this does. I basically made a copy of the source binding and replaced it with my own syntax where possible, since the concept is fundamentally the same. I cannot figure out where to do the test for qualification to be rendered, if that makes sense.
I'm having a big logic disconnect here - there should ideally be some place where I can basically say ... If the current item that kendo is attempting to render in a template matches a criteria, render it. If not, pass it over and then another place where I tell it to iterate over every object in the 'associative array' so as to get to the point where I test it.
I feel just forcing a for loop in here will actually make this fire too many times, and I am getting pretty lost. Any help is greatly appreciated.
kendo.data.binders.repeat = kendo.data.Binder.extend({
init: function(element, bindings, options) {
kendo.data.Binder.fn.init.call(this, element, bindings, options);
var source = this.bindings.repeat.get();
if (source instanceof kendo.data.DataSource && options.autoBind !== false) {
source.fetch();
}
},
refresh: function(e) {
var that = this,
source = that.bindings.repeat.get();
if (source instanceof kendo.data.ObservableArray|| source instanceof kendo.data.DataSource) {
e = e || {};
if (e.action == "add") {
that.add(e.index, e.items);
} else if (e.action == "remove") {
that.remove(e.index, e.items);
} else if (e.action != "itemchange") {
that.render();
}
} else {
that.render();
}
},
container: function() {
var element = this.element;
if (element.nodeName.toLowerCase() == "table") {
if (!element.tBodies[0]) {
element.appendChild(document.createElement("tbody"));
}
element = element.tBodies[0];
}
return element;
},
template: function() {
var options = this.options,
template = options.template,
nodeName = this.container().nodeName.toLowerCase();
if (!template) {
if (nodeName == "select") {
if (options.valueField || options.textField) {
template = kendo.format('<option value="#:{0}#">#:{1}#</option>',
options.valueField || options.textField, options.textField || options.valueField);
} else {
template = "<option>#:data#</option>";
}
} else if (nodeName == "tbody") {
template = "<tr><td>#:data#</td></tr>";
} else if (nodeName == "ul" || nodeName == "ol") {
template = "<li>#:data#</li>";
} else {
template = "#:data#";
}
template = kendo.template(template);
}
return template;
},
add: function(index, items) {
var element = this.container(),
parents,
idx,
length,
child,
clone = element.cloneNode(false),
reference = element.children[index];
$(clone).html(kendo.render(this.template(), items));
if (clone.children.length) {
parents = this.bindings.repeat._parents();
for (idx = 0, length = items.length; idx < length; idx++) {
child = clone.children[0];
element.insertBefore(child, reference || null);
bindElement(child, items[idx], this.options.roles, [items[idx]].concat(parents));
}
}
},
remove: function(index, items) {
var idx, element = this.container();
for (idx = 0; idx < items.length; idx++) {
var child = element.children[index];
unbindElementTree(child);
element.removeChild(child);
}
},
render: function() {
var source = this.bindings.repeat.get(),
parents,
idx,
length,
element = this.container(),
template = this.template();
if (source instanceof kendo.data.DataSource) {
source = source.view();
}
if (!(source instanceof kendo.data.ObservableArray) && toString.call(source) !== "[object Array]") {
source = [source];
}
if (this.bindings.template) {
unbindElementChildren(element);
$(element).html(this.bindings.template.render(source));
if (element.children.length) {
parents = this.bindings.repeat._parents();
for (idx = 0, length = source.length; idx < length; idx++) {
bindElement(element.children[idx], source[idx], this.options.roles, [source[idx]].concat(parents));
}
}
}
else {
$(element).html(kendo.render(template, source));
}
}
});
I would propose as a simpler solution transform transmitted associative array in an array. This is pretty simple and (for most cases) can solve your problem.
Lets say that you get the following associative array received from the server:
{
"One" : { Name: "One", Id: "id/one" },
"Two" : { Name: "Two", Id: "id/two" },
"Three" : { Name: "Three", Id: "id/three" }
}
That is store in a variable called input. Transform it from associative to no associative is as easy as:
var output = [];
$.each(input, function(idx, elem) {
elem.index = idx;
output.push(elem);
});
Now, you have in output an equivalent array where I saved the index field into a field called index for each element of the associative array.
Now you can use out-of-the-box code for displaying the data received from the server.
See it in action here : http://jsfiddle.net/OnaBai/AGfWc/
You can even use KendoUI DataSource for retrieving and transforming the data by using DataSource.schema.parse method as:
var dataSource = new kendo.data.DataSource({
transport: {
read: ...
},
schema : {
parse: function (response) {
var output = [];
$.each(response, function(idx, elem) {
elem.index = idx;
output.push(elem);
});
return output;
}
}
});
and your model would be:
var viewModel = new kendo.data.ObservableObject({
Id: "test/id",
Associative: dataSource
});
You can see it in action here: http://jsfiddle.net/OnaBai/AGfWc/1/
I am using Selenium WebDriver for crawling a web site(only for example, I will be crawling other web sites too!) which has infinite scroll.
Problem statement:
Scroll down the infinite scroll page till the content stops loading using Selenium web driver.
My Approach:
Currently I am doing this-
Step 1: Scroll to the page bottom
JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("javascript:window.onload=toBottom();"+
"function toBottom(){" +
"window.scrollTo(0,Math.max(document.documentElement.scrollHeight," +
"document.body.scrollHeight,document.documentElement.clientHeight));" +
"}");
Then I wait for some time to let the Ajax Request complete like this-
Step 2: Explicitly wait for Ajax request to be over
Thread.sleep(1000);
Then I give another java script to check if the page is scrollable
Step 3:Check if the page is scrollable
//Alternative to document.height is to be used which is document.body.clientHeight
//refer to https://developer.mozilla.org/en-US/docs/DOM/document.height
if((Long)js.executeScript("return " +
"(document.body.clientHeight-(window.pageYOffset + window.innerHeight))")>0)
If the above condition is true then I repeat the from Step 1 - 3, till condition in Step 3 is false.
The Problem:
I do not want to give the Thread.sleep(1000); in step 2, rather I would like to check using Java Script if the background Ajax request is over and then scroll down further if the condition in Step 3 is true .
PS: I am not the developer of the page so I do not have access to the code running the page, I can just inject java scripts(as in Step 1 and 3) in the web page. And, I have to write a generic logic for any web site with Ajax requests during infinite scroll.
I will be grateful to some one could spare some time here!
EDIT : Ok, after struggling for 2 days, I have figured out that the pages which I am crawling through the Selenium WebDriver can have any of these JavaScript libraries and I will have to pool according to the different Library, for example, In case of the web application using jQuery api, I may be waiting for
(Long)((JavascriptExecutor)driver).executeScript("return jQuery.active")
to return a zero.
Likewise if the web application is using the Prototype JavaScript library I will have to wait for
(Long)((JavascriptExecutor)driver).executeScript("return Ajax.activeRequestCount")
to return a zero.
Now, the problem is how do I write a generic code which could handle most the JavaScript libraries available?
Problem I am facing in implementing this-
1. How do I find which JavaScript Library is being used in the Web Application(using Selenium WebDriver in Java), such that I can then write the corresponding wait methods?
Currently, I am using this
Code
2. This way I will have to write as many as 77 methods for separate JavaScript library so, I need a better way to handle this scenario as well.
In short, I need to figure out if the browser is making any call(Ajax or simple) with or without any JavaScript library through Selenium Web Driver's java implementation
PS: there are Add ons for Chorme's JavaScript Lib detector and Firefox's JavaScript Library detector which detect the JavaScript library being used.
For web pages with Ajax Response during the infinite scroll and using jQuery API(or other actions), before starting to opening the web page.
//Inject the pooling status variable
js.executeScript("window.status = 'fail';");
//Attach the Ajax call back method
js.executeScript( "$(document).ajaxComplete(function() {" +
"status = 'success';});");
Step 1: will remain the same as in the original question
Step 2 Pooling the following script(This is the one which removes the need of Thread.Sleep() and makes the logic more dynamic)
String aStatus = (String)js.executeScript("return status;");
if(aStatus!=null && aStatus.equalsIgnoreCase("success")){
js.executeScript("status = 'fail';");
break poolingLoop;
}
Step 3: No need now!
Conclusion: No need to give blunt Thread.sleep(); again and again while using Selenium WebDriver!!
This approach works good only if there's jQuery api being used in the web application.
EDIT:
As per the the link given by #jayati i injected the javascript-
Javascript one:
//XMLHttpRequest instrumentation/wrapping
var startTracing = function (onnew) {
var OldXHR = window.XMLHttpRequest;
// create a wrapper object that has the same interfaces as a regular XMLHttpRequest object
// see http://www.xulplanet.com/references/objref/XMLHttpRequest.html for reference on XHR object
var NewXHR = function() {
var self = this;
var actualXHR = new OldXHR();
// private callbacks (for UI):
// onopen, onsend, onsetrequestheader, onupdate, ...
this.requestHeaders = "";
this.requestBody = "";
// emulate methods from regular XMLHttpRequest object
this.open = function(a, b, c, d, e) {
self.openMethod = a.toUpperCase();
self.openURL = b;
ajaxRequestStarted = 'open';
if (self.onopen != null && typeof(self.onopen) == "function") {
self.onopen(a,b,c,d,e); }
return actualXHR.open(a,b,c,d,e);
}
this.send = function(a) {
ajaxRequestStarted = 'send';
if (self.onsend != null && typeof(this.onsend) == "function") {
self.onsend(a); }
self.requestBody += a;
return actualXHR.send(a);
}
this.setRequestHeader = function(a, b) {
if (self.onsetrequestheader != null && typeof(self.onsetrequestheader) == "function") { self.onsetrequestheader(a, b); }
self.requestHeaders += a + ":" + b + "\r\n";
return actualXHR.setRequestHeader(a, b);
}
this.getRequestHeader = function() {
return actualXHR.getRequestHeader();
}
this.getResponseHeader = function(a) { return actualXHR.getResponseHeader(a); }
this.getAllResponseHeaders = function() { return actualXHR.getAllResponseHeaders(); }
this.abort = function() { return actualXHR.abort(); }
this.addEventListener = function(a, b, c) { return actualXHR.addEventListener(a, b, c); }
this.dispatchEvent = function(e) { return actualXHR.dispatchEvent(e); }
this.openRequest = function(a, b, c, d, e) { return actualXHR.openRequest(a, b, c, d, e); }
this.overrideMimeType = function(e) { return actualXHR.overrideMimeType(e); }
this.removeEventListener = function(a, b, c) { return actualXHR.removeEventListener(a, b, c); }
// copy the values from actualXHR back onto self
function copyState() {
// copy properties back from the actual XHR to the wrapper
try {
self.readyState = actualXHR.readyState;
} catch (e) {}
try {
self.status = actualXHR.status;
} catch (e) {}
try {
self.responseText = actualXHR.responseText;
} catch (e) {}
try {
self.statusText = actualXHR.statusText;
} catch (e) {}
try {
self.responseXML = actualXHR.responseXML;
} catch (e) {}
}
// emulate callbacks from regular XMLHttpRequest object
actualXHR.onreadystatechange = function() {
copyState();
try {
if (self.onupdate != null && typeof(self.onupdate) == "function") { self.onupdate(); }
} catch (e) {}
// onreadystatechange callback
if (self.onreadystatechange != null && typeof(self.onreadystatechange) == "function") { return self.onreadystatechange(); }
}
actualXHR.onerror = function(e) {
ajaxRequestComplete = 'err';
copyState();
try {
if (self.onupdate != null && typeof(self.onupdate) == "function") { self.onupdate(); }
} catch (e) {}
if (self.onerror != null && typeof(self.onerror) == "function") {
return self.onerror(e);
} else if (self.onreadystatechange != null && typeof(self.onreadystatechange) == "function") {
return self.onreadystatechange();
}
}
actualXHR.onload = function(e) {
ajaxRequestComplete = 'loaded';
copyState();
try {
if (self.onupdate != null && typeof(self.onupdate) == "function") { self.onupdate(); }
} catch (e) {}
if (self.onload != null && typeof(self.onload) == "function") {
return self.onload(e);
} else if (self.onreadystatechange != null && typeof(self.onreadystatechange) == "function") {
return self.onreadystatechange();
}
}
actualXHR.onprogress = function(e) {
copyState();
try {
if (self.onupdate != null && typeof(self.onupdate) == "function") { self.onupdate(); }
} catch (e) {}
if (self.onprogress != null && typeof(self.onprogress) == "function") {
return self.onprogress(e);
} else if (self.onreadystatechange != null && typeof(self.onreadystatechange) == "function") {
return self.onreadystatechange();
}
}
if (onnew && typeof(onnew) == "function") { onnew(this); }
}
window.XMLHttpRequest = NewXHR;
}
window.ajaxRequestComplete = 'no';//Make as a global javascript variable
window.ajaxRequestStarted = 'no';
startTracing();
Or Javascript Two:
var startTracing = function (onnew) {
window.ajaxRequestComplete = 'no';//Make as a global javascript variable
window.ajaxRequestStarted = 'no';
XMLHttpRequest.prototype.uniqueID = function() {
if (!this.uniqueIDMemo) {
this.uniqueIDMemo = Math.floor(Math.random() * 1000);
}
return this.uniqueIDMemo;
}
XMLHttpRequest.prototype.oldOpen = XMLHttpRequest.prototype.open;
var newOpen = function(method, url, async, user, password) {
ajaxRequestStarted = 'open';
/*alert(ajaxRequestStarted);*/
this.oldOpen(method, url, async, user, password);
}
XMLHttpRequest.prototype.open = newOpen;
XMLHttpRequest.prototype.oldSend = XMLHttpRequest.prototype.send;
var newSend = function(a) {
var xhr = this;
var onload = function() {
ajaxRequestComplete = 'loaded';
/*alert(ajaxRequestComplete);*/
};
var onerror = function( ) {
ajaxRequestComplete = 'Err';
/*alert(ajaxRequestComplete);*/
};
xhr.addEventListener("load", onload, false);
xhr.addEventListener("error", onerror, false);
xhr.oldSend(a);
}
XMLHttpRequest.prototype.send = newSend;
}
startTracing();
And checking the status of the status vars ajaxRequestStarted, ajaxRequestComplete in the java code, one can determine if the ajax was started or completed.
Now I have a way to wait till an Ajax is complete, I can also find if the Ajax was triggered on some action
Approach 1:
Your approach is good, just a few changes would do the trick:
Step 1: Improve this step to call the toBottom function at regular interval using window.setInterval. At (c >= totalcount) call window.clearInterval
Setp 2: Instead of checking the page is yet scrollable, check if (c >= totalcount). And this condition every 200ms until (c >= totalcount) returns true.
FYI: If the Step 1 doesn't work in all the browsers then probably, you can refer to line 5210 of Tata-Nano-Reviews-925076578.js and call this with cvariable checking.
Approach 2:
Go to jQuery API and type "ajax". You can find some callback handlers which could be used for ajax requests.
Probably, set a variable before the request is been sent and after it is been received appropriately.
And in between use your original method of scrolling to bottom at regular interval, unless you can no more scroll. At this point clear the interval variable.
Now, regularly check if that interval variable is null or not. Null would mean that you have reached the bottom.
We had to solve the same problem, and managed using a long Javascript function. Just need to add checks to see which library is not undefined.
PS Thanks for giving me an easy answer for how to check for in progress Prototype requests!
eg. Handle JQuery and XHR/Prototype
var jsExecutor = /*Get your WebDriverInstance*/ as IJavaScriptExecutor;
while(/*your required timeout here*/)
{
var ajaxComplete =
jsExecutor.ExecuteScript("return ((typeof Ajax === 'undefined') ||
Ajax.activeRequestCount == 0) && ((typeof jQuery === 'undefined') || $.active == 0)");
if (ajaxIsComplete)
return
}