Javascript Download !!TOP!! Xml File From Server
Demarcus Smith
I have an application which runs on mobile devices such as android, and I have some third party traffic tracking js code to track the usage of my application. So everytime a user opens up my application the js code sends a ping to the 3rd party tracking server. However I'm not sure if there's an easy way to embed the js code directly into my application that's not browser based and couldn't interpret js code. So I may have to execute the js code on the server side. The 3rd party code is like this :
I answered the question, but I didn't really address the problem. Even if the code will execute run on the server, it won't work as intended. You really need to come up with a better solution for tracking usage of a non web based application.
'So I may have to execute the js code on the server side. ' no need it to run on a nclient side browser, or browser lke component in your native app - "Web view" or ask them for a REST API, get info of handset from native code and call the API (web service all over http in most cases)
Most major websites use some kind of server-side technology to dynamically display data as required. For example, imagine how many products are available on Amazon, and imagine how many posts have been written on Facebook. Displaying all of these using different static pages would be extremely inefficient, so instead such sites display static templates (built using HTML, CSS, and JavaScript), and then dynamically update the data displayed inside those templates when needed, such as when you want to view a different product on Amazon.
Getting started with server-side programming is usually easier than client-side development, because dynamic websites tend to perform a lot of very similar operations (retrieving data from a database and displaying it in a page, validating user-entered data and saving it in a database, checking user permissions and logging users in, etc.), and are constructed using web frameworks that make these and other common web server operations easy.
This topic contains the following modules. You should start with the first module, then go on to one of the following modules, which show how to work with two very popular server-side languages using appropriate web frameworks.
This module provides technology-agnostic information about server-side website programming such as "what is it?", "how does it differ from client-side programming?", and "why is it useful?". This module also outlines some of the more popular server-side web frameworks and gives guidance on how to select the best one for your site. Lastly, an introduction to web server security is provided.
Django is an extremely popular and fully featured server-side web framework, written in Python. The module explains why Django is such a good web server framework, how to set up a development environment and how to perform common tasks with it.
Configuring your server to send the correct MIME types (also known as media types or content types) to browsers is important for browsers to be able to properly process and display the content. It is also important to prevent malicious content from masquerading as benign content.
This module provides technology-agnostic information about server-side website programming such as \"what is it?\", \"how does it differ from client-side programming?\", and \"why is it useful?\". This module also outlines some of the more popular server-side web frameworks and gives guidance on how to select the best one for your site. Lastly, an introduction to web server security is provided.
Is the use of server side javascript prevalent? Why would one use it as opposed the any other server side scripting? Is there a specific use case(s) that makes it better than other server side languages?
Servers are expensive, but users will give you processing time in their browsers for free. Therefore, server-side code is relatively expensive compared to client-side code on any site big enough to need to run more than one server. However, there are some things you can't leave to the client, like data validation and retrieval. You'd like to do them on the client, because it means faster response times for the users and less server infrastructure for yourself, but security and accessibility concerns mean server-side code is required.
What typically happens is you do both. You write server-side logic because you have to, but you also write the same logic in javascript in hopes of providing faster responses to the user and saving your servers a little extra work in some situations. This is especially effective for validation code; a failed validation check in a browser can save an entire http request/response pair on the server.
Since we're all (mostly) programmers here we should immediately spot the new problem. There's not only the extra work involved in developing two sets of the same logic, but also the work involved in maintaining it, the inevitable bugs resulting from platforms don't match up well, and the bugs introduced as the implementations drift apart over time.
Enter server-side javascript. The idea is you can write code once, so the same code runs on both server and client. This would appear to solve most of the issue: you get the full set of both server and client logic done all at once, there's no drifting, and no double maintenance. It's also nice when your developers only need to know one language for both server and client work.
These aren't completely unassailable technical problems: you constrain the server-supported language to a sub-set of javascript that's well supported across most browsers, provide an IDE that knows this subset and the server-side extensions, make some rules about page structure to minimize DOM issues, and provide some boiler-plate javascript for inclusion on the client to make the platform a little nicer to use. The result is something like Aptana Studio/Jaxer, or more recently Node.js, which can be pretty nice.
But not perfect. In my opinion, there are just too many pitfalls and little compatibility issues to make this really shine. Ultimately, additional servers are still cheap compared to developer time, and most programmers are able to be much more productive using something other than javascript.
What I'd really like to see is partial server-side javascript. When a page is requested or a form submitted the server platform does request validation in javascript, perhaps as a plugin to the web server that's completely independent from the rest of it, but the response is built using the platform of your choice.
I think a really cool use of server-side Javascript that isn't used nearly often enough is for data validation. With it, you can write one javascript file to validate a form, check it on the client side, then check it again on the server side because we shouldn't trust anything on the client side. It lets you keep your validation rules DRY. Quite handy.
Javascript is a perfectly good language with a self / scheme prototype style base and a C style syntax. There are some problems, see Javascript the Good Parts, but in general it's a first rate language. The problem is that most javascript programmers are terrible programmers because it's very accessible to get started.
One team at google built out Rhino on Rails, which is an MVC framework like Ruby on Rails which is written in javascript and runs on Rhino a javascript interpreter for the Java VM. In this case they had a requirement to use the Java VM, but wanted to get a language which was fast (javascript is fast), supported duck typing, and was flexible.
Another example is something like CouchDB, a document oriented database which uses json as it's transport format and javascript as it's query & index language. They wanted the database to be as web native as possible.
When I look at compiled code, especially Java code it all still seems to be the same old tools - Spring (maybe SpringBoot) and Jackson. .NET has advanced server side, but not to the extent of the JS world.
Node.js is a powerful runtime environment for executing JavaScript code outside of a web browser. It brings the JavaScript language to the server-side, enabling developers to build scalable, high-performance, and event-driven applications.
Node.js allows developers to use JavaScript both on the client-side and the server-side, providing a unified language and ecosystem. This eliminates the need for context switching and enables code reuse between the front-end and back-end. This results in improved productivity and reduced development time.
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