What is difference between Get, Post, Put and Delete?

Question

What is difference between Get, Post, Put and Delete? In Which scenario we are using these?

Nilesh Jadav · Answer

Hello Jagdev An HTTP request is a class consisting of HTTP style requests, request lines, request methods, request URL, header fields, and body content. The most common methods that are used by a client in an HTTP request are as follows:- 1) GET:- Used when the client is requesting a resource on the Web server. 2) HEAD:- Used when the client is requesting some information about a resource but not requesting the resource itself. 3) POST:- Used when the client is sending information or data to the server—for example, filling out an online form (i.e. Sends a large amount of complex data to the Web Server). 4) PUT:- Used when the client is sending a replacement document or uploading a new document to the Web server under the request URL. 5) DELETE:- Used when the client is trying to delete a document from the Web server, identified by the request URL. 6) TRACE:- Used when the client is asking the available proxies or intermediate servers changing the request to announce themselves. 7) OPTIONS:- Used when the client wants to determine other available methods to retrieve or process a document on the Web server. 8) CONNECT:- Used when the client wants to establish a transparent connection to a remote host, usually to facilitate SSL-encrypted communication (HTTPS) through an HTTP proxy. 1) GET : The GET method is the simplest and the most frequently used request method. It is used to access the static resources, such as HTML documents and images. GET request can be used to retrieve dynamic information by including query parameters in the request URL. For instance, we can send a parameter name with the URL, such as http://www.domain.com?name=Nilesh . In this example, Nilesh is the dynamic information sent by including a parameter,name, in the request URL. The Web Server can then access this dynamic information through the “name” parameter. 2) POST: The POST request method provides the following functionalities:- 1) Providing annotations of the existing resources. 2) Posting a message to a bulletin board, newsgroup, mailing list, or a similar group of articles. 3) Providing a block of data, such as the result of the submitting a form, to a data-handling process. 4) Extending a database through an append operation.

Upendra Pratap Shahi · Answer

Because the HTTP GET method is specified as idempotent, a GET request, by specification, can be resubmitted with the assumption that it will not change anything on the server. This is not the case for a HTTP POST which by specification can change the status of the application running on the server. So, by specification, one can perform an HTTP GET against a page N number of times without worrying of being changing its status. Not respecting the specification may have various undesired results, for example Web crawlers follow through GET request to index a site but not POST, if you allowed an HTTP GET request to make changes to the database, you can easily understand the undesired implication it can have. Respecting a specification is like respecting an agreement between your service or website and an array of different consumers which can be normal users' browsers but also other services like web crawlers. You could build a site that uses a GET to insert a record, but you should also expect that whatever is built around to consume your site is functioning with the assumption that you are respecting the agreement. As a last example, web browsers warn users when they try to refresh a page that was reached by a HTTP POST request warning that some data might be resubmitted. You do not get that layer of protection built-in browsers if the page is reached by a HTTP GET request. GET to get the resource PUT to update POST to Insert DELETE to delete Read below link- http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html If this is satisfied you kindly mark the answer as Accepted Answer

Pankaj Kumar Choudhary · Answer

Hello @jahdev you can visit these links https://spring.io/understanding/REST http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html http://www.sitepoint.com/key-differences-post/

Dipankar Biswas · Answer

Hi.. Check this link... http://www.sitepoint.com/key-differences-post/ Thanks..

What is difference between Get, Post, Put and Delete?

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