Things to know

Stateless Protocol

Stateless protocol is a protocol which treats every request as an independent transaction and no relations with previous transactions. So server will not retain session information or status about each communication party.

Ex: -

·         Internet Protocol (IP) –foundation of internet

·         HTTP -Foundation of World Wide Web

Advantages

-       No need to dynamically allocate storage for each conversation

-       No need to clean/reset client’s state during the conversation

Disadvantages

-       Every request should contain additional information and this information should interpret by server.

Note:

Statefull protocol is the opposite of stateless protocol and following are the examples for statefull protocols.

-       TCP

-       FTP

REST (Representational State Transfer)

Rest services Relies on cacheable, state-less, client- server communicational protocols so normally used Http protocol for all CRUD operations.

RESTS is an architecture style for designing networked applications and organize the independent systems

Simple and fully featured architecture

Features of REST

• Language independent (C# programs can communicate with Java things)
• Platform independent
• Can easily be used in presence of firewall
• Doesn’t offer the built in security, session management, encryption but those features can added by building on top of Http

GET Vs. POST

	GET	POST
Form data passing	Form data is encode to URL	Form data is appear within message body
Security	Everyone can see the data because data passing through the URL as less security than POST. Not used to send sensitive data like user name and password. Easier to hack	Data passing inside the message body so visibility is restricted .security wise better than GET as POST can use to send sensitive data Hard to hack
Data caching	Can be bookmarked and parameters can save in browser history and caching is possible	Can’t be bookmarked and parameters are not save in browser history. Cannot be cache
Restrictions on form data	Length of the URL is limit and browser specific so data passing through the URL is limited	No restriction on form data length
Restriction on form data type	Only ASCII characters possible	No restrictions even Binary characters are allowed
Usage	Use to retrieve data.	Can involve with any operations(CRUD)