Skip to main content

Difference between get and post and request



  • Fundamental Difference is probably the Visibility - GET request is sent via the URL string (appended to the URI with a question-mark as separator), which is visible whereas POST request is encapsulated in the body of the HTTP request and can't be seen.


  • Length - Since, GET request goes via URL, so it has a limitation for its length. It can't be more than 255 characters long (though this is browser dependent, but usually the max is 255 characters only). Whereas no such maximum length limitation holds for the POST request for the obvious reason that it becomes a part of the body of the HTTP request and there is no size limitation for the body of an HTTP request/response.


  • Performance - GET request is comparatively faster as it's relatively simpler to create a GET request and the time spent in the encapsulation of the POST request in the HTTP body is saved in this case. In addition, the maximum length restriction facilitates better optimization of GET implementation.


  • Type of Data - GET request is sent via URL string and as we all know that URL can be text-only, so GET can carry only text data whereas POST has no such restriction and it can carry both text as well as binary data.


  • Caching/Bookmarking - again for the obvious reason that a GET request is nothing but an URL hence it can be cached as well as Bookmarked. No such luxuries with a POST request.


  • FORM Default - GET is the default method of the HTML FORM element. To submit a FORM using POST method, we need to specify the method attribute and give it the value "POST".


  • Data Set - GET requests are restricted to use ASCII characters only whereas POST requests can use the 'enctype' attribute with a value "multipart/form-data" to use the Universal Multiple-Octet Coded Character Set (UCS).



When to use what? 

The "get" method should be used when the form is idempotent (i.e., causes no side-effects). Many database searches have no visible side-effects and make ideal applications for the "get" method.

If the service associated with the processing of a form causes side effects (for example, if the form modifies a database or subscription to a service), the "post" method should be used.

I think the above W3C Recommendation makes it pretty clear when to use the GET method and when to use the POST method.
Labels:
Location: Ahmedabad, Gujarat, India

Comments

Post a Comment

Popular posts from this blog

Number Format In Javascript

Number.toFixed() :                                 Formats any number for "x" number of trailing decimals. The number is rounded up, and "0"s are used after the decimal point if needed to create the desired decimal length.   var profits=2489.8237 profits.toFixed(3) //returns 2489.824 (round up) profits.toFixed(2) //returns 2489.82 profits.toFixed(7) //returns 2489.8237000 (padding)   Number.toPrecision() :                                   Formats any number so it is of "x" length. Also called significant digits. A decimal point and "0"s are used if needed to create the desired length.   var anumber=123.45 anumber.toPrecision(6) //returns 123.450 (padding) anumber.toPrecision(4) //returns 123.5 (round up) anumber.toPrecision(2) //returns 1.2e+2 (you figure it out!) Round to a certain number of places For rounding decimals y
2 comments
Read more

Use of indexOf and charAt in javascript

indexOf(): The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs. example :  <script type="text/javascript"> var str="Hello world!"; document.write(str.indexOf("d") + "<br />"); document.write(str.indexOf("WORLD") + "<br />"); document.write(str.indexOf("world")); </script> Output : 10 -1 6 charAt() The charAt() method returns the character at the specified index in a string. The index of the first character is 0, and the index of the last character in a string called "txt", is txt.length-1 <script type="text/javascript"> var str = "Hello world!"; document.write("First character: " + str.charAt(0) + "<br />"); document.write("Last character: " + str.charAt(str.l
Post a Comment
Read more

Html tags

HTML Basic Document <html> <head> <title>Title of document goes here</title> </head> <body> Visible text goes here... </body> </html> Heading Elements <h1>Largest Heading</h1> <h2> . . . </h2> <h3> . . . </h3> <h4> . . . </h4> <h5> . . . </h5> <h6>Smallest Heading</h6> Text Elements <p>This is a paragraph</p> <br /> (line break) <hr /> (horizontal rule) <pre>This text is preformatted</pre> Logical Styles <em>This text is emphasized</em> <strong>This text is strong</strong> <code>This is some computer code</code> Physical Styles <b>This text is bold</b> <i>This text is italic</i> Links Ordinary link: <a href="http://www.example.com/">Link-text goes here</a> Image-link: <a href="http://ww
2 comments
Read more