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Differences between Server-Side and Client-Side Scripting Languages

In the reference to the above scenario:
You have to more focuses on the concepts of web application development for instance different users, site analysis, purpose, site accessibility, web legislation, web functionality, scripting language and security. 
Describe the concept of web-based application including its advantages, critically evaluate its functionality and discuss how the web-based application is employed to solve the business problem described above?
There are various languages available for managing the server-side and client-side scripting language. You are free to choose any server-side and client-side scripting language for this work even though ASP.NET is recommended as the lectures will cover it. Your task here is to critically compare the key differences between the various server side technologies and do the same for the client side technologies with appropriate examples. Moreover, demonstrate evidently how each of them can beused to solve the given problem.
1.3 In the development of web application security of data and information is very important and any application is required to manage them appropriately. Discuss web security techniques and explain how you use them to protect the data in the web application design.
• To achieve M1; learner has to identify and apply strategies to find appropriate solution for the client side and server side technologies with an example.
LO2: Be able to design web applications
You have to pay more attention for to design of the web application and database system that must be suitable to solve given problem (above scenario). You have to investigate,identify and select appropriate tools to solve the given problem (scenario). You have to focuson architectural design, UI design and backend database design.
2.1 Design a web-based application based on the above scenario. This design will be limited to the UI design and overall site map.
2.2 You have to show how the client-side and server-side technologies are synthesized into a web application. This should constitute the complete system architectural design.
2.3 Design and create a database using MS SQL Server to use in your web application. You have to create required tables in your database.
2.4 There are various designs and solutions which can be employed to meet the requirements of the given scenario. Your task here is to investigate and evaluate alternative designs and solutions.
• To achieve M2; learner has to select and apply appropriate methods/techniques, e.g. storyboards including header, footer, main content sections with logo, navigation links menu, relevant images/video, layout design, login form, students record entry form, complete entity relationship diagram, attributes analysis, data flow diagram, use case diagram. 
• To achieve D1; learner has to produce client-server architecture that suits their web application and demonstrate critical reflection to evaluate overall web application design approach.
LO3: Be able to implement web applications
In the reference to the above scenario, this task is focused on implementation of database connected web application based on the design produced in task 2 above. There are various tools and techniques available e.g. html, CSS, JavaScript, VB Script, PHP, MySQL, SQL Server, ASP.NET, Boo,tstrap, JSP, Java Applet etc. The lectures in this module will cover ASP.NET and MS SQL server, use these technologies in your implementation.3.1 Implement the web application based on the design you produced in task 2 above using ASP.NET. Produce the evidence of using client-side technologies.
3.2 By incorporating server-side technologies to the client side implementation in 3.1 above, your task here is to implement a web-enabled database management system to store, retrieve and manipulate data in a web application. You can use ASP.NET and SQL Server for this task.
3.3 Identify and implement opportunities for error handling of the web-based application (e.g. user data input forms such as login form, record entry form etc.)
• To achieve D3; learner has to implement a proper functional system that reflects creativity in developing the proposed design concept (client-server architecture) explained in LO2 and all sub learning tasks. 
LO4: Be able to test web applications
You should concentrate different types of web-application testing approach, test plan Department of Information Technology(expected result, actual result), testing mechanism, analysis feedback, technical and user documentation etc.
4.1 You are required to critically review and test the overall performance of your webapplication by testing both the client side (front end) and the server side (back end). You have to create appropriate test cases to test the functional and nonfunctional 
requirements of the web application produced.
4.2 Analyse the actual test results (from 4.1 above) against expected results and identify any discrepancies and explain with evidence how you would resolve these.
4.3 Critically evaluate user feedback on your web application. For this, you have to prepare a feedback sheet for distribution among different users. Collate their feedback, analyze them and make recommendations for further improvements of your developed web 
application.
4.4 Documentation (e.g. requirements documents, technical design documents, test documents user documents etc.) are important components of software development and delivery. Your task here to demonstrate your understanding of the importance of such documents and then produce a user documentation for your web application.

Differences between Server-Side and Client-Side Scripting Languages

A web-based application is any application that employs the use of websites as front-end or as user interface. The users are able to access the application as they are connected to the internet and have access to a standard web browser. It is different from the traditional applications where a software has to be installed on the user’s computer for them to access the application functions (GU and YU, 2009). An example of a web application is the Google Docs. However, it is possible to convert desktop software into a web-based application.

Web-based applications have numerous advantages including:

Cost effectiveness: users use a uniform platform to access the system, the web browser. Web applications need only to be developed for one operating system which will be hosted and the users will be able to access regardless of the operating system running on their computers. Unlike the traditional desktop applications where application have to be developed for every operating system (HE and XIE, 2013). We applications is cheaper both to develop and test.

Accessible anywhere, any time: as long as you have access to the internet and a computer, one can be able to access the system from anywhere at any time unlike the traditional that you have to install the application to a computer before using it. It also allows real-time collaboration, tele-commuting, and global teamwork.

Customizable: as compared to traditional applications it is easier to customize web-applications making it easier to update the feel and look of the interface and customize how the information is displayed and presented to the different group of users. Therefore, it is not necessary to have all users sharing similar interfaces instead, you can determine the best interface for every user or situation.

Can be accessed from a wide range of devices. Web-based application can be designed to be responsive to fit the different screen sizes. Since the applications are not dependent on the operating system, it can be accessed from laptops, tables, desktops, or even mobile phones as long as you have a web browser and access to the internet (Mohan, et al., 2014). This allows the users to interact with the system using methods and devices that best suits them.

Interoperability: it is easier to attain a greater interoperability level amongst the web applications as compared to the traditional stand-alone desktop applications. For instance, a web-based accounting application can be easily integrated with a shopping cart because of the ability of web-based architecture to support integration of enterprise systems more rapidly.

Easy installation: the complexity of installing and maintaining web-based applications is less. This is because once the update or upgrade has been installed on the host server, all the users will be able to access it immediately and no need to upgrade the application on individual user computers.

Enhanced security: web-based applications are installed on dedicated servers and are monitored by highly skilled and experienced administrators. This means that potential breaches and threats are identified easily and security is tighter (QIN, et al., 2013).

Designing Web Applications and Creating Databases

Web Application can be defined as an application that uses a website in functioning and interfacing. PWA which is a Progressive Web App can be defined as the web app that uses some applications in modern app capabilities e.g. Elixir in delivering the applications which are native and which are an experience to the users (Kraenzel, 2017).  This application has been in existence since the early 90s, shortly after the WWW was introduced (Weaver, 2018). They have walked hand in hand from the scripts such as the client slides scripts which are the creation of Netscape to the flash player. Immediately after the completion of the HTML5 in the year, 2011 web applications have been granted to have some more capabilities for the interactions on the client-side which have allowed many modern web applications and thus making it more interactive in so many ways (Hume, 2017).  The following are some of the ways through the web Application have been applied.

  1.    Users will be able to communicate on even the terms. In most cases, this is termed to be so useful for businesses that have or owns machines which are different and applied in most places which are different. Web browser beauty is that they are always designed to work across each and every platform and thus making the architecture to remain relatively consistently (Biørn-Hansen, 2017). For instance, a Linux user is able to share a document to another user using Windows OS and who is remotely working with another user using a Mac OS as long each of them has some internet connections. In businesses, this may mean that the companies can be able to concentrate on the major objectives instead of worrying over the obstacles which are non-central such as the conformity between the hardware.
  2.    Web Applications being Everywhere and always available enable users to operate from anywhere.  There are many situations we have heard one saying that I will at them when I get into the office and thus one can be able to understand that availability is everywhere and thus it is a very significant tool for any single business. Progressive apps maybe handy and rigid for workers who may be in need of information immediately such as the salespeople, agents working in the real estate and the officer in the finance (Sheppard, 2017). The continued development of the mobile phones and the propelling in browsers have always been available and thus lessening the need for the less portability of the availability laptops and are always in the arm’s reach.
  3.    Web applications have allowed some sensitive information to be stored in a single location which is well defended.   In most cases, most of the people who work in the cybersecurity may tell one that the human errors are some of the most regular causes of the data leaks, more than the shoddy firewalls and the protocols. They are much easier in controlling the flow of the sensitive data among all the staff, where each will have to log in through the web application that will record all the specific identity, the time of the logs as well as the date and the files that they interacted with.
  4.    Progressive Web application in most cases they allow a collaboration which is instant.  Some of the applications such as the Skype, Google Docs and Hangouts and slack have been designed for the users so that they can work on the same project in the real-time instead of them using emails and fax which are known to be back and forth in all times and one cannot be able to have assurance the other end has seen the message.  There are many others application helping in communication which has collaborated widely.Thus, enhancing communication into areas beyond the use of phone calls and much more the use of emails. Web applications have been able to allow for the remote presentations as well as meetings that have negated the need for one to travel in most of the cases and thus going beyond to just saving the cost of the long-distance calls when conversing in different countries with different zip codes (Firtman, 2016). The collaborative apps have got features which have been created so that they can be able to save time and much more money and thus having some efficiency which has boosted the efficiency by providing further such magnification in their usefulness.
  5.    Valuable information having some constant streams. This means that they can be applied in feeding each and every part of the country in the process of decision making.  This ranges from the website to social media efforts and much more on the digital marketing (Griffith, 2017).  Amidst having some constant influx in starting new sites and pages in social media, many of the businesses will have to use data from the given web apps so that they gain the leverage over the competitors, even if it’s just through elimination of the online strategies which have been ineffective in the favor of those who are working.
  6.    They are less sensitive in terms of scalability for the workloads that are increasing daily.  A good example is that of a system relying on the local machines for the hardware power or maybe upgrading the entire system which may need upgrading all the connected clients. PWA always provides data to each and every client even in remote places, the only thing that may require an upgrade for the workloads which have increased is that ability to be able to scale them horizontally. Similarly, it may be easier for one to be able to identify the problem in the system in case the nucleus is in a central position, the part which is malfunctioning may it be a hardware or even software and thus be ready to be replaced with even affecting the entire system.
  7.    PWA have allowed upgrades in the core technologies without the upgrades on the capabilities of the clients.  In the desktop software becoming more robust, many machines where they lie and operates have to follow such a suit. This isn’t much of a big concern for any single user who is looking to take any advantage of the latest software.  With PWA, many innovators can be able to continue with them without too much concern over the results of what they have discovered in terms of whether they will be known globally.

The server-side scripting is that technique in programming used for producing the code which will be running in the software on the server side, in simple terms it is any script or a program which can run on the web server. All the customizations on a given website, all the dynamic changes in the web content, generation responses to the queries of the users and database access are all performed on the server end (Crawford, 2017). This script has constructed communication links between the server and the user.  The server side is known to incorporate at least three parts namely the Database, Server and the API and the software at the back-end of the web software which has been developed by the SSS language.  

In the case where a browser sends the request to a given server for a given webpage which may consist of SSS, the web server will have to process the scripts prior serving the webpage to the web browser (Hughes, 2016). In this case to process, a script one could include extraction of information in the DB, make calculations which are simple and thus choosing the appropriate content that has to be displayed in the client end. The script that is then processed and the outcome is sent to the to the web browser. The web server can abstract all the scripts on the end user side until it serves the content and thus making the data and the source date very much secure.

The languages of SSS after the advent of CGI have evolved such as the RUBY, PHP, Python, ColdFusion, Java, C# and C++ among others.

  1.    PHP. This is the most used and prevalent SSS language which is applied on the web and designed in extracting and manipulating the information in the DB.  This language is associated with the SQL language of the DB. It has been applied in making Facebook, Wikipedia, and WordPress among many other.
  2.    Python. This is very short in terms of code and very much fast when in use. It always good for beginners as it has put its concentration on the readability and the code simplicity. It always functions well in the environment which is object-oriented and it is used in most famous websites such as the Google and YouTube among others.
  3.    Ruby. This is known for its complex logic which has packages in the back-end with the DB utility and thus it is always provided by the PHP and SQL.

These are scripts which are performed so that they can generate a code that may be running on the client side that is the browser without the need to of the server end processing. These types of the scripts are usually embedded on the on the HTML document. The client Slide scripting has been used in examining the users form for bugs before it is submitted and also to change the content with reference to the input of the user. As it is mentioned, the web will always require the three elements for its to function which are the DB, Client and the server respectively. If the client slide scripting is effective then it can significantly help in reducing the server load. It is in most cases designed in a way that it can run the scripting language by utilizing the web browser to act as the host program (Shepherd, 2016). A good example is when a user makes a given request via the web browser for a webpage to the given server, it will be sent to the HTML and to CSS as a plain text and the web browser will have to do an interpretation and thus rendering the content in the web in the client side.  The following are some of the client-side scripting languages.

  1.    HTML – this is the building block in the web programming which has fundamentally provided the frame of the website. It is describing the content arrangement.
  2.    CSS – cascading style sheets have been providing all ways in which the graphic elements can be easily designed and thus helping the web application appearance to look more attractive.
  3.    JavaScript – this is also a Client-Side scripting language which has been created for some specific functionalities, currently there exist some various frameworks of java scripts which are applied or used on the SSS technology.  

Differences Between the Server-Side Scripting and the Client-Side Scripting

Server-Side Scripting

Client-Side Scripting

It is always used at the backed, this is where we have the source code which is not viewable or in other words it is hidden on the client side which is the browser

This is always used as the front-end which is used by the users so that they can see on the displayed content in the web browser.

When the server-side script is in most cases processed then it always communicates with the server.

In the client-side script, it does not involve or need any interaction with the server.

It is very useful and much more when customizing the pages in the web and much more implementing such dynamic changes in the website.

It is conversely in the client-side script, this is because it has effectively minimized all the loads to the specific server.

This one is more secure than on the client-side scripting as it is not viewable on the client side meaning it is hidden.

Its prone to insecurity as it is visible to all the users.

Implementing Web Applications using Different Tools and Techniques

There are some software techniques which can help in keeping the system secure such as the one stated below.

  1.    To keep the software up to date.
  2.    Enforcing a policy of using strong passwords
  3.    Login pages being encrypted.
  4.    Using a host which is secure.
  5.    Keeping the website always clean
  6.    Doing regular and frequent backups
  7.    Scanning one website to check the vulnerabilities
  8.    One can hire an expert in security to monitor the system threats in advance.

Testing of the student attendance system was conducted to check for potential bugs before being commissioned for production (Swarup and Kapoor, 2014). Other important issues such as functionality and security are also carried out. Several tests were done on the system; they include the following.

Functional testing: this testing was carried out to ascertain that the application has met all the requirements specified by the client. This included testing all the links on the web pages are working and that there are no broken links. The links tested include internal links, outgoing links, mail-to links, and anchor links (CHEN, ZHANG and XIN, 2013). Test forms are also checked for instance if the user does not key in the student number or password and error message should come up.

Usability testing: this is the most critical test that was conducted. The system was subjected to be tested by a small focus group sampled from the target audience. The focus was to ensure that the users were able to navigate thought the application and can carry out the tasks with less or no guidance. Some of other functions that the testers did was to test application navigation (menus, links, or buttons), test the content (no grammatical errors and is legible) (LI, et al., 2014).

Interface testing: three main sections were tested including We, application, and database server. The application was tested to ascertain that it was able to send correct requests to the database and display correct output on the client side. The application should detect any errors and notify the user. Web server was tested to ensure that it could handle user requests without any denial of service. The database server was tested to ensure that it could give desired results from the queries issued by the users (FU, LU and ZENG, 2009).

Compatibility testing: this test was done to ascertain that the application could be accessed from a range of devices with different screen sizes to ensure that the look and feel remained consistent. Some of the compatibility testing carried out include browser compatibility testing, and the operating system which the application will be deployed.

Performance testing: the test was conducted to check if the application could work under heavy traffic form the users. The test tasks included but were not limited to: the response time of the web application at different speeds of connection, test was done to check the behavior and load time of the application under peak and normal traffic, test how the site recovers from crush because of peak loads, stress tests to determine the web application breaking point when traffic is pushed beyond peak load (WENG, CAI and YAO, 2013).

Conclusion

In conclusion, progressive web applications have the ability to solve many business problems because uses some applications in modern app capabilities such Elixir in delivering the applications which are native and which are an experience to the users. Testing of the student attendance system was conducted to check for potential bugs before being commissioned for production. Other important issues such as functionality and security are also carried out. Client-side scripting and the server-side scripting have worked in coordinated ways and manners with each other. These two techniques are so different as in the client-side scripting much emphasizes have been put on making the web application interface to be more appealing and much more functional while the server-side scripting has put more emphasis on accessing the data methods, handling of data and thus having faster processing.

Reference List

Biørn-Hansen, A., Majchrzak, T.A. and Grønli, T.M., 2017, April. Progressive web apps: The possible web-native unifier for mobile development. In Proceedings of the 13th International Conference on Web Information Systems and Technologies (WEBIST) (pp. 344-351).

Chen, P., Zhang, J. and Xin, T. (2013). Application of Online Calibration Technique in Computerized Adaptive Testing. Advances in Psychological Science, 21(10), pp.1883-1892.

Crawford, T. and Hussain, T., 2017, July. A Comparison of Server-Side Scripting Technologies. In Proceedings of the 15th International Conference on Software Engineering Research and Practice, Las Vegas, NV (pp. 69-76).

Firtman, M., 2016. High-Performance Mobile Web: Best Practices for Optimizing Mobile Web Apps. " O'Reilly Media, Inc.".

Fu, H., Lu, Y. and Zeng, G. (2009). Web application test model based on action. Journal of Computer Applications, 29(3), pp.695-698.

Griffith, C., 2017. Mobile App Development with Ionic, Revised Edition: Cross-Platform Apps with Ionic, Angular, and Cordova. " O'Reilly Media, Inc.".

Gu, X. and Yu, H. (2009). Improvement of full function point for Web-based applications. Journal of Computer Applications, 28(12), pp.3098-3101.

He, C. and Xie, Q. (2013). Personalized Web services selection method based on collaborative filtering. Journal of Computer Applications, 33(1), pp.239-242.

Hughes, S.R. and Rist, J.E., Red Hat Inc, 2016. Server-side internationalization and localization of web applications using a scripting language. U.S. Patent 9,465,799.

Hume, D.A., 2017. Progressive web apps. Manning Publications Co.

Kraenzels, C.J., Immermanih, J.D., Mills, W.A. and Lu, J.J., International Businesses Machines Corp, 2017. Systems and methods for developing and administering web-applications and services from a given workflow, enterprises, and mail-enabled web-application server and platforms. U.S. Patent 9,805,337.

Li, H., Wang, S., Liu, C., Zheng, J. and Li, Z. (2014). Software Reliability Model Considering both Testing Effort and Testing Coverage. Journal of Software, 24(4), pp.749-760.

Mohan, S., Alam, F., Fowler, J., Gopalakrishnan, M. and Printezis, A. (2014). Capacity Planning and Allocation for Web-Based Applications. Decision Sciences, 45(3), pp.535-567.

Qin, Z., Song, X., Geng, J. and Chen, W. (2013). Markov-based survivability model for Web applications. Journal of Computer Applications, 33(2), pp.400-403.

Shepherd, D.R., Sibert, M.A. and Soroka, D.M., International Business Machines Corp, 2016. Client-side script to application communication system. U.S. Patent 9,357,013.

Sheppard, D., 2017. Introduction to Progressive Web Apps. In Beginning Progressive Web App Development (pp. 3-10). Apress, Berkeley, CA.

Swarup, S. and Kapoor, D. (2014). Web Vulnerability Scanner (WVS): A Tool for detecting Web Application Vulnerabilities. International Journal of Engineering Research, 3(2), pp.126-131.

Weaverih, S., Shanks, S.D., Spielmanah, S.J., Li, M., Museh, S.V. and Kosakovsky Pond, S.L., 2018. Datamonkey 2.0: a modern web application for characterizing selective and other evolutionary processes. Molecular biology and evolution, 35(3), pp.773-777.

Weng, L., Cai, W. and Yao, Y. (2013). Research on pressor strategy of Web application system load testing. Journal of Computer Applications, 32(10), pp.2973-2976.

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