Ajax XParser

XParser is a simple, yet highly effective component that could be launched in any Ajax based application. This is often used in parsing RSS and Atom feeds to the website. However, it could be more than a mere parser.

XParser could be used to retrieve certain elements from specific resources. These elements could contain data that could be loaded to the website directly or elements that are required from other functions. XParser is a very simple but could be used in many ways. Ultimately, XParser could improve the Ajax application in so many ways.

Types of XParser

XParserAttribute – This is the simplest form of XParser that could be launched in JavaScript and in turn Ajax. Its sole function is to fetch the attribute of the element. This is often launched in online applications since functions vary from time to time and the attributes needs to be individually fetched.

XParserAttribute does this job very well if properly coded. The challenging part though is it requires individual tagging for XParserAttribute which is very tedious.

XParserElement – This type of XParser is often used in XML, which also an essential element in Ajax. XParserElement is used to extract the attributes and the elements at the same time, its values. This type of XParser is more robust in the sense that it could be used in more ways compared to XParserAttribute.

Configuring XParserElement on the other hand is a little bit challenging which defeats the purpose of using XParser which is ease of coding. However, some find XParserElement to be easier because it could specify the type of data without longer line of codes.

XParserItem – This type of XParser could be easily identified with regular parsing because it could extract actual “items” such as feeds from RSS and ATOM. A single XParserItem could contain different values and attributes since it contains a good amount of data.

This is highly recommended in parsing feeds since it could compact the information from these feeds and sends them easily to the client side using JavaScript. Since it is used in data intensive functions only, it is easier to configure since there is usually a single source of data which is usually a feed.

Challenges of XParser in Ajax

• Frameworks – XParser could ease the requirement of coding in developing an Ajax application. However a framework wherein a single line of JavaScript is not written, XParser could be a block instead of an advantage in Ajax development.

Developers who would work with frameworks should consider using flexible frameworks that could accept manual reconfiguration of codes so that XParser functions could be inserted.

• Security – XParser could present new challenges for developers on securing the data transfer. XParser is used to extract information and it could be used to inject code to the client side which could ultimately extract information and could be directed to the attacker.

XParser should help the developer build a faster and more efficient Ajax based application. However, certain precautions have to be made to ensure the application’s security is optimized even with the use of different types of XParser.