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New, syllabus, 2020-21, Chapter 11, Web services,, Ecomm. Payment, transaction, , Computer Science, Class XII ( As per CBSE Board), Visit : python.mykvs.in for regular updates
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Web services, Web service - is a standardized medium,protocol or language to, propagate communication between the client and server, applications on the World Wide Web. A web service is a software, module that is designed to perform a certain set of tasks., , Web services are invoked by the user directly or indirectly to, provide services to the program/software which is being used as, a part of WWW.User may be unaware about such web services., The web services can be searched for over the network and can, also be invoked accordingly., When invoked, the web service would be able to provide the, functionality to the client, which invokes that web service., Visit : python.mykvs.in for regular updates
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Web services, Many people think that the internet and the world wide web, (WWW) are the same thing. While they are closely linked, they, are very different systems., The internet is a huge network of computers all connected, together. The world wide web (‘www’ or ‘web’ for short) is a, collection of webpages found on this network of computers. Our, web browser uses the internet to access the web., The World Wide Web is a way of exchanging information, between computers on the Internet, tying them together into a, vast collection of interactive multimedia resources., World Wide Web was created by Timothy Berners Lee in 1989 at, CERN in Geneva. World Wide Web came into existence as a, proposal by him, to allow researchers to work together, effectively and efficiently at CERN. Eventually it became World, Wide Web., Visit : python.mykvs.in for regular updates
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Web services, Web architecture –, , Web is a two – tiered architecture., • A web browser display information contents, • Web server that transfers information to the client, Visit : python.mykvs.in for regular updates
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Web services, HTML – Hyper text markup language is a document design, language not a programming language. It provide various, kinds of tags(commands) used to define the structure and, appearance of web page., HTML was created by Sir Tim Berners-Lee in late 1991 but, was not released officially, which was published in 1995 as, HTML 2.0. HTML5 is the latest evolution of the standard that, defines HTML., , Visit : python.mykvs.in for regular updates
Page 6 : Web services, Basic structure of HTML document –, <html>, <head>, <title>simple document</title>, </head>, <body>, <p>a simple paragraph</p>, </body>, </html>, Save above content in text editor with .html extension and open, it in web browser to run it(tags).Generally/Most of the tags are, written as part of <body> tag., List of HTML Tags, Visit : python.mykvs.in for regular updates
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Web services, Extensible Markup Language (XML) is a markup language, that defines a set of rules for encoding documents in a, format that is both human-readable and machinereadable., XML is Platform Independent and Language, Independent: The main benefit of xml is that we can use, it to take data from a program like Microsoft SQL,, convert it into XML then share that XML with other, programs and platforms. You can communicate between, two platforms which are generally very difficult., Visit : python.mykvs.in for regular updates
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Web services, Difference between HTML and XML, BASIS FOR, COMPARISON, , XML, , HTML, , Expands to, , Extensible Markup Language, , Hypertext Markup Language, , Basic, , Provides a framework for markup, , HTML is predefined markup language., , Structural, , Information Provided, , Does not contain structural information, , Language type, , Case sensitive, , Case insensitive, , Purpose of the language Transfer of information, , Presentation of the data, , Errors, , Not allowed, , Small errors can be ignored., , Whitespace, , Can be preserved., , Does not preserve white spaces., , Closing tags, , Compulsory to use closing tags., , Closing tags are optional., , Nesting, , Must be properly done., , Not much valuable., , Visit : python.mykvs.in for regular updates
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Web services, Structure of XML Document System, A XML Document is intended to display data like HTML., An XML document system comprises the following Style Sheet (CSS or XSL), It defines the style (How it would appear i.e. font,, color, size alignment etc.) of the elements., Grammar Structure (DTD), It is optional component in XML document system, and defines the Rules of the document (Tag, definitions)., XML File, It contains and describes actual data., Visit : python.mykvs.in for regular updates
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Web services, How to Prepare XML Document, In order to prepare XML Document system, you may, do the following steps Prepare XML document file as per problem, XML document is divided into two part., 1. The Prolog :, Preface or Introduction to the XML document. It, includes An XML declaration, Comments etc., 2. The Data Instance :, It contains actual data., , Prepare a style-sheet file for XML file, It contains style rules that tells a browser how to, display an XML document., , Link the XML file with Style sheet, Visit : python.mykvs.in for regular updates
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Web services, Example to create XML document, Expected View on Browser, Suppose we, want to make an, XML document, which is, displayed in, browser as, shown here, , Computer Parts, Mother Board, , Asus, P3B-F, 1230.00, TFT Monitor, LG Electronics, 995e, 8500.00, , Visit : python.mykvs.in for regular updates
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Web services, HTTP -, , HTTP stands for hypertext transfer protocol and is used to transfer data across, the Web. It allow users of the World Wide Web to exchange information found on web, pages. When accessing any web page entering http:// in front of the address tells the, browser to communicate over HTTP., How It WorksIt is a connectionless text based protocol. Clients (web browsers) send requests through, request object of http to web servers for web pages / images etc.Web server respond, accordingly through response object of http After this cycle(request – response), the, connection between client and server across the Internet is disconnected. A new connection, must be made for each request(means for each web page)., , This diagram shows the, working of http protocol., Working with dns server, and working with web, Server both., , Visit : python.mykvs.in for regular updates
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Web services, DNS, , –The Domain Name System, translates human readable domain, names (for example, www.python.mykvs.in) to machine readable IP, addresses (for example, 182.156.84.26). ... DNS servers translate requests, for names into IP addresses., Request python.mykvs.in, Response 182.156.84.26, , Local DNS server, Make http Request to 182.156.84.26, Http response, , A domain name is our website name. e.g. in python.mykvs.in , in is primary, domain,mykvs is subdomain of in and python is subdomain of mykvs., Generic domain name - .com,.edu,.gov,.mil,.net,.org etc, Country specific domain name - .in for india,.us for united states, Visit : python.mykvs.in for regular updates
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Web services, , URL, , –Uniform Resource Locator is defined as the global address of, documents and other resources on the World Wide Web. The URL is, an address that sends users to a specific resource online, such as a, webpage, video or other document or resource., e.g., http://python.mykvs.in/syllabus/cs12.pdf, protocol subdomain domain name, , path, , Visit : python.mykvs.in for regular updates
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Web services, Web page - A html document which can be displayed in a web, browser., Website - A collection of web pages which are grouped together, and usually connected together in various ways. Often called a, "web site" or simply a "site.“, Web browser – A software which interpret html document and, display them in human readable form is known as web browser., E.g. Firefox, Google Chrome, Opera, Microsoft Internet Explorer or, Edge, or Apple's Safari. These are also often called just "pages.“, Web server – A software which host website and return web pages, to web client(web browser) on request. E.g. Apache Tomcat,, Microsoft’s Internet Information Services (IIS) Windows Server ,, Nginx web server , Jigsaw , Zeus web server, Visit : python.mykvs.in for regular updates
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Web services, Domain Name-Domain name is the address of your website that, people type in the browser’s URL bar to visit your website., Web hosting - Web hosting is the place where all the files of your, website live. It is like the home of our website where it actually, lives., A good way to think about this is if the domain name is the address, of our house, then web hosting is the actual house that address, points to. All websites on the internet, need web hosting., Domain names and web hosting are two different services., However, they work together to make websites possible.It is, possible with the system known as DNS., Visit : python.mykvs.in for regular updates
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Web services, There are four main types of web hosting:, • Shared hosting – share by multiple domains/web sites., • VPS (virtual private server) hosting - The main server is split into, multiple virtual servers—hence the name. These virtual servers, can be customized by individual websites., • Dedicated hosting - Websites being hosted on a dedicated server, have complete technical control over the server settings. We, choose the software, configurations, and anything else we need., • Cloud hosting - Cloud hosting plans come with multiple remote, servers. Each server has different responsibilities. If one of the, servers is compromised or has a problem, the other servers on the, network will take over those responsibilities and pick up the slack., • Reseller hosting and WordPress hosting are also specific types of, hosting, Visit : python.mykvs.in for regular updates
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Web services, Web script - A computer programming language for adding dynamic capabilities to, World Wide Web pages. The CGI component on the server contains small, programs called scripts that take information from the browser system or provide, it for display., Scripting languages are like programming languages that allow us to write, programs in form of script. These scripts are interpreted not compiled and, executed line by line.Two types of scripting languages are used., • Client Side Scripting languages, • Server Side Scripting languages, , Visit : python.mykvs.in for regular updates
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Web services, , Client-side Scripting -, , refers to the programs that are executed on, client-side. Client-side scripts contains the instruction for the browser to be, executed in response to certain user’s action. Suppose we want to develop web, page for simple calculation then client side scripting must be preferred as the, numbers will be entered at the client side and can be executed at client computer., If such data are to be processed at server end then suppose 100 user calculate, then 100 threads of process will be running over the server as a result server, speed will be slowed down., Following table describes commonly used Client-Side scripting languages:, • JavaScript- It is a prototype based scripting language. It inherits its naming, conventions from java. All java script files are stored in file having .js extension., • VBScript - It is an open source web programming language developed by, Microsoft. It is superset of JavaScript and adds optional static typing classbased object oriented programming., • PHP is an acronym for "PHP: Hypertext Preprocessor“ ,is a widely-used, open, source scripting language & is free to download and use run on both client and, server., Visit : python.mykvs.in for regular updates
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Web services, Sever-side scripting, , acts as an interface for the client and also limit the, user access the resources on web server. It can also collects the user’s, characteristics in order to customize response.Suppose a user login in a web, application then user will enter user name and password ,which will be sent to, server end and will be checked at server only for login purpose., • ASP-Active Server Pages (ASP)is server-side script engine to create dynamic, web pages. It supports Component Object Model (COM) which enables ASP, web sites to access functionality of libraries such as DLL., • Java Server Page (JSP) - is a technology for controlling the content or, appearance of Web pages through the use of servlets, small programs that are, specified in the Web page and run on the Web server to modify the Web page, before it is sent to the user who requested it. Sun Microsystems, the developer, of Java, also refers to the JSP technology as the Servlet application program, interface (API). JSP is comparable to Microsoft's Active Server Page (ASP), technology., • PHP is an acronym for "PHP: Hypertext Preprocessor“ ,is a widely-used, open, source scripting language & is free to download and use run on both client and, server., Visit : python.mykvs.in for regular updates
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Web services, Web 2.0 Web 2.0 is the name used to the describe the second generation of the, world wide web, where focus is given to a more interactive and dynamic, web experience. Web 2.0 is focused on the ability for people to collaborate, and share information online via social media, blogging and Web-based, communities.It support an interactive experience between users and Web, publishers, rather than the one-way conversation that had previously, existed. web 2.0. the term means such internet applications which allow, sharing and collaboration opportunities to people and help them to express, themselves online., Web 2.0 examples include hosted services (Google Maps),Web applications, ( Google Docs, Flickr), Video sharing sites (YouTube), blogs (WordPress),, social networking (Facebook), Microblogging (Twitter) content hosting, services and many more., Visit : python.mykvs.in for regular updates
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Ecommerce Payment, transactions, , An ecommerce payment transaction - is a way, of making transactions or paying for goods, and services through an electronic medium,, without the use of checks or cash., The electronic payment system has grown, increasingly over the last decades due to the, growing spread of internet-based banking and, shopping., Visit : python.mykvs.in for regular updates
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Ecommerce Payment, transactions, Payment transaction through Online banking – Online, banking is also known as internet banking or web banking., Online banking offers customers almost every service, traditionally available through a local branch including, deposits, transfers, and online bill payments., HOW-When we pay through internet banking then as we, select the payment through internet/online/net banking, option we are directed to the bank's login site. There we, enter our id and password. then we confirm our payment, by accepting the terms and we receive an OTP (one-timepassword) after which the transaction is complete., Visit : python.mykvs.in for regular updates
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Ecommerce Payment, transactions, Payment transaction through Mobile banking – Mobile, Banking is simply the use of mobile phones and, accompanying mobile apps to carry out banking, transactions., How – Install mobile banking app->login through user, name and password->quick transfer/payment transfer ->, send money -> enter debit from account /select qr, code/pay using account detail->Feed account detail of, beneficiary ->Enter amount to be transferred -> press, submit/confirm->Enter OTP received->Press submit., Amount will be deducted from account and credited in, beneficiary account., Visit : python.mykvs.in for regular updates
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Ecommerce Payment, transactions, Payment transaction through Payment Apps & Services – Payment, apps allow us to make payments using our phone depending on the, app we download and our phone, we may be able to pay by tapping, our phone at a point of sale rather than swiping a credit/debit card., Popular online payment apps or payment apps or e wallet list in India, include:, • Paytm., • Google Pay., • Amazon Pay., • JIO Money., • Freecharge., • Yono SBI., • Airtel Money., Visit : python.mykvs.in for regular updates
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Ecommerce Payment, transactions, How to make payment through Paytm?, • Open the Paytm App & tap on 'Pay or Send' option., • Scan the QR code provided by the merchant., • Enter the amount to be paid, add comments if any & tap on 'Pay', • We'll receive a confirmation on our registered mobile number once the, transaction is complete., How to make payment through Google Pay, • On your Android device, open the Google Pay for Business app., • Decide how to do payments., • Tap QR code., • Confirm transaction, How do I pay using Amazon Pay UPI? Paying for our order at store is easy., Open Amazon app & click on Scan icon, then scan the UPI QR code and, enter the desired amount to be paid. Enter our UPI pin and our payment is, complete., Visit : python.mykvs.in for regular updates
