1. AJAX uses a group of technologies including HTML, CSS, DOM, JavaScript, and XMLHttpRequest to asynchronously exchange data with a web server in the background without interfering with the display and behavior of the existing page.
2. The document discusses how AJAX works and the XMLHttpRequest object used to asynchronously exchange data with a web server. It provides examples of using AJAX for real-time validation and to retrieve up-to-date stock information from a database without reloading the page.
3. The key steps in an AJAX application are to create an XMLHttpRequest object, assign an onreadystatechange handler, open a request to the server, and send the request. The response is then
Advanced Web Development in PHP - Understanding REST APIRasan Samarasinghe
ESOFT Metro Campus - Advanced Web Development in PHP - (Module VIII) Understanding REST API
(Template - Virtusa Corporate)
Resources: codeofaninja.com
Contents:
What is an API?
Comparing a website to an API
Classification of APIs
What is REST API?
What model does REST use?
REST HTTP Methods
HTTP Codes
The advantages of REST
What is CRUD?
CRUD Operations
CRUD Application Example
Simple REST API Implementation in PHP
Web root Folders and Files Structure
MySQL Database
Reading all Products
Reading one Product
Creating a Product
Updating a Product
Deleting a Product
Searching a Product
PHP stands for “PHP: Hypertext Preprocessor”. It is very good for creating dynamic content. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP.
Advanced Web Development in PHP - Understanding REST APIRasan Samarasinghe
ESOFT Metro Campus - Advanced Web Development in PHP - (Module VIII) Understanding REST API
(Template - Virtusa Corporate)
Resources: codeofaninja.com
Contents:
What is an API?
Comparing a website to an API
Classification of APIs
What is REST API?
What model does REST use?
REST HTTP Methods
HTTP Codes
The advantages of REST
What is CRUD?
CRUD Operations
CRUD Application Example
Simple REST API Implementation in PHP
Web root Folders and Files Structure
MySQL Database
Reading all Products
Reading one Product
Creating a Product
Updating a Product
Deleting a Product
Searching a Product
PHP stands for “PHP: Hypertext Preprocessor”. It is very good for creating dynamic content. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP.
What is JavaScript?
JavaScript is a very powerful client-side scripting language. JavaScript is used mainly for enhancing the interaction of a user with the webpage. In other words, you can make your webpage more lively and interactive, with the help of JavaScript. JavaScript is also being used widely in game development and Mobile application development.
In JavaScript, almost "everything" is an object.
-Booleans can be objects (if defined with the new keyword)
-Numbers can be objects (if defined with the new keyword)
-Strings can be objects (if defined with the new keyword)
-Dates are always objects
-Maths are always objects
-Regular expressions are always objects
-Arrays are always objects
-Functions are always objects
-Objects are always objects
What is JavaScript?
JavaScript is a very powerful client-side scripting language. JavaScript is used mainly for enhancing the interaction of a user with the webpage. In other words, you can make your webpage more lively and interactive, with the help of JavaScript. JavaScript is also being used widely in game development and Mobile application development.
In JavaScript, almost "everything" is an object.
-Booleans can be objects (if defined with the new keyword)
-Numbers can be objects (if defined with the new keyword)
-Strings can be objects (if defined with the new keyword)
-Dates are always objects
-Maths are always objects
-Regular expressions are always objects
-Arrays are always objects
-Functions are always objects
-Objects are always objects
The first of its kind Web Technology Conference on Open Source Technology, WebOSS '07 was organised in Kolkata on Sat, 13th Oct 07 and I spoke at the event as one of the participants on "Building Applications using AJAX". Here I will share my presentation.
Ajax stands for Asynchronous JavaScript and Xml. Ajax is not a single technology, but a group of technologies. HTML and CSS can be used in combination to mark up and style information. The DOM is accessed with JavaScript to dynamically display, and allow the user to interact with, the information presented. JavaScript and the XMLHttpRequest object provide a method for exchanging data asynchronously between browser and server to avoid full page reloads.
Bally Chohan IT Solution is an UK based IT Agency that provides IT services such as Web Development, Web Designing, E-commerce development etc.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Ajax Lecture Notes
1. A New Way To WebA New Way To Web
Applications DevelopmentApplications Development
AJAXAJAX
Mrs.C.SanthiyaMrs.C.Santhiya
Assistant ProfessorAssistant Professor
TCE,MaduraiTCE,Madurai
2. RIA ExRIA Ex
Rich Internet Application (RIA) likesRich Internet Application (RIA) likes
following ?following ?
3. Client-Side ProgrammingClient-Side Programming
Recall the technologies comprisingRecall the technologies comprising DHTMLDHTML
1.1. HTML (HTML (contentcontent))
2.2. Document Object Model (DOM) (Document Object Model (DOM) (data structuredata structure))
3.3. JavaScript (JavaScript (behaviourbehaviour))
4.4. Cascading Style Sheets (Cascading Style Sheets (presentationpresentation))
JavaScriptJavaScript is a powerful tool for dynamic client-side programmingis a powerful tool for dynamic client-side programming
4. How does AJAX work?How does AJAX work?
• AJAXAJAX uses a programming model withuses a programming model with displaydisplay andand eventsevents..
• These events areThese events are user actionsuser actions, they call, they call functionsfunctions associatedassociated
withwith elements of the web pageelements of the web page..
• InteractivityInteractivity is achieved withis achieved with formsforms andand buttonsbuttons..
• DOMDOM allows to link elements of the page withallows to link elements of the page with actionsactions and also toand also to
extract data fromextract data from XMLXML or Text files provided by the server.or Text files provided by the server.
6. Classic Web Application ModelClassic Web Application Model
Do not work well for some webDo not work well for some web
applications.applications.
Real time validation.Real time validation.
Loss of operation context during pageLoss of operation context during page
refresh.refresh.
Excessive server load and bandwidthExcessive server load and bandwidth
consumption due to redundant pageconsumption due to redundant page
refreshes.refreshes.
7. What isWhat is AJAXAJAX??
AAsynchronoussynchronous JJavaScriptavaScript AAndnd XXMLML
AJAXAJAX is not a technology itself.is not a technology itself.
Refers to the use of a group of technologiesRefers to the use of a group of technologies
together.together.
– HTMLHTML oror DHTMLDHTML andand CSSCSS for presentationfor presentation
information.information.
– Document Object ModelDocument Object Model manipulated throughmanipulated through
JavaScriptJavaScript to dynamically display and interact with theto dynamically display and interact with the
information presented.information presented.
– XMLHttpRequestXMLHttpRequest object to exchange dataobject to exchange data
asynchronously with the web server.asynchronously with the web server.
8. What are the Issues with AJAX?What are the Issues with AJAX?
User does not know updates will occur.User does not know updates will occur.
User does not notice an update.User does not notice an update.
User can not find the updated information.User can not find the updated information.
Unexpected changes in focus.Unexpected changes in focus.
Loss of Back button functionality*.Loss of Back button functionality*.
URIs can not be bookmarked*.URIs can not be bookmarked*.
11. Creating the ObjectCreating the Object
For Safari and MozillaFor Safari and Mozilla
var req = new XMLHttpRequest();var req = new XMLHttpRequest();
For the ActiveX branchFor the ActiveX branch
var req = newvar req = new
ActiveXObject("Microsoft.XMLHTTP");ActiveXObject("Microsoft.XMLHTTP");
12. The XMLHttpRequest object (cont.)The XMLHttpRequest object (cont.)
function getXMLHttpRequest()function getXMLHttpRequest()
/* This function attempts to get an Ajax request object by trying/* This function attempts to get an Ajax request object by trying
a few different methods for different browsers. */a few different methods for different browsers. */
{{
var request, err;var request, err;
try {try {
request = new XMLHttpRequest(); // Firefox, Safari, Opera, etc.request = new XMLHttpRequest(); // Firefox, Safari, Opera, etc.
}}
catch(err) {catch(err) {
try { // first attempt for Internet Explorertry { // first attempt for Internet Explorer
request = new ActiveXObject("MSXML2.XMLHttp.6.0");request = new ActiveXObject("MSXML2.XMLHttp.6.0");
}}
catch (err) {catch (err) {
try { // second attempt for Internet Explorertry { // second attempt for Internet Explorer
request = new ActiveXObject("MSXML2.XMLHttp.3.0");request = new ActiveXObject("MSXML2.XMLHttp.3.0");
}}
catch (err) {catch (err) {
request = false; // oops, can’t create one!request = false; // oops, can’t create one!
}}
}}
}}
return request;return request;
}}
If this function doesn’t return “false” then we were successful in creating anIf this function doesn’t return “false” then we were successful in creating an XMLHttpRequestXMLHttpRequest object.object.
13. Object MethodsObject Methods
MethodMethod DescriptionDescription
abort()abort() Stops the current request.Stops the current request.
getAllResponseHeaders()getAllResponseHeaders() Returns complete set of headersReturns complete set of headers
(labels and values) as a string(labels and values) as a string
getResponseHeader("getResponseHeader("headerLabelheaderLabel")") Assigns destination URL, method, andAssigns destination URL, method, and
other optional attributes of a pendingother optional attributes of a pending
requestrequest
open("open("methodmethod", "", "URLURL"[,"[, asyncFlagasyncFlag[,[,
""userNameuserName"[, ""[, "passwordpassword"]]])"]]])
Assigns destination URL, method, andAssigns destination URL, method, and
other optional attributes of a pendingother optional attributes of a pending
requestrequest
send(send(contentcontent)) Transmits the request, optionally withTransmits the request, optionally with
postable string or DOM object datapostable string or DOM object data
setRequestHeader("setRequestHeader("labellabel", "", "valuevalue")") Assigns a label/value pair to theAssigns a label/value pair to the
header to be sent with a requestheader to be sent with a request
14. Object PropertiesObject Properties
PropertyProperty DescriptionDescription
onreadystatechangeonreadystatechange Event handler for an event that fires atEvent handler for an event that fires at
every state changeevery state change
readyStatereadyState Object status integer:Object status integer:
0 = uninitialized0 = uninitialized
1 = loading1 = loading
2 = loaded2 = loaded
3 = interactive3 = interactive
4 = complete4 = complete
responseTextresponseText String version of data returned from serverString version of data returned from server
processprocess
responseXMLresponseXML DOM-compatible document object of dataDOM-compatible document object of data
returned from server processreturned from server process
statusstatus Numeric code returned by server, such asNumeric code returned by server, such as
404 for "Not Found" or 200 for "OK"404 for "Not Found" or 200 for "OK"
statusTextstatusText String message accompanying the statusString message accompanying the status
codecode
15. A general skeleton for an Ajax applicationA general skeleton for an Ajax application
<script type="text/javascript">
// ***** include the getXMLHttpRequest function defined before
var ajaxRequest = getXMLHttpRequest();
if (ajaxRequest) { // if the object was created successfully
ajaxRequest.onreadystatechange = ajaxResponse;
ajaxRequest.open("GET", "search.php?query=Bob");
ajaxRequest.send(null);
}
function ajaxResponse() //This gets called when the readyState changes.
{
if (ajaxRequest.readyState != 4) // check to see if we’re done
{ return; }
else {
if (ajaxRequest.status == 200) // check to see if successful
{ // process server data here. . . }
else {
alert("Request failed: " + ajaxRequest.statusText);
}
}
}
</script>
16. Database Stock ExampleDatabase Stock Example
AJAXAJAX can be used to runrun PHP scripts that obtain
up-to-the-minute information stored on a database.
AJAXAJAX can be used to runrun PHP scripts that obtain
up-to-the-minute information stored on a database.
19. AJAX –AJAX – connectconnect to server,to server, sendsend requestrequest
function startJS() {
xhrequest = null;
try {
xhrequest = getXMLHttpRequest();
}
catch(error) {
document.write("Cannot run Ajax code using this browser");
}
if(xhrequest != null) { JavaScript gets a reference to any element in a
page using DOM API
// get form values ID Attribute
var strStock = document.getElementById("strStock").value;
var strUrl = "example18-2.php??strStock=" + strStock;
xhrequest.onreadystatechange = changePagechangePage; Php script +query
xhrequest.open("GETGET", strUrl, true);
xhrequest.send(null);
}
}
20. function changePage() {
if (xhrequest.readyState == 44 && xhrequest.status == 200200) {
var strResponsestrResponse = xhrequest.responseText;
document.getElementById("strStockResult").innerHTML =
strResponsestrResponse;
}
}
21. function getXMLHttpRequest() {
var xhrequest = null;
open window in browser
if(window.XMLHttpRequestXMLHttpRequest) {
property s present
// If IE7, Mozilla, Safari, etc: Use native object
try {
xhrequest = new XMLHttpRequest();
return xhrequest;
use native scripting
}
catch(exception) {ss
// OK, just carry on looking
}
}
22. Steps of AjaxSteps of Ajax
A client event occurs.
An XMLHttpRequest object is created.
The XMLHttpRequest object is configured.
The XMLHttpRequest object makes an
asynchronous request to the Webserver.
The Webserver returns the result containing XML
document.
The XMLHttpRequest object calls the callback()
function and processes the result.
The HTML DOM is updated.