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As per functionality both GET and POST methods were same.Difference is GET method will be showing the information information to the users.But in the case of POST method information will not be shown to the user.
The data passed using the GET method would be visible to the user of the website in the browser address bar but when we pass the information using the POST method the data is not visible to the user directly.
Also in GET method characters were restricted only to 256 characters.But in the case of POST method characters were not restricted.
Get method will be visible to the user as it sended appended to the URL, put Post will not be visible as it is sent encapsulated within the HTTP request body.
About the data type that can be send, with Get method you can only use text as it sent as a string appended with the URL, but with post is can text or binary.
About form default, Get is the defualt method for any form, if you need to use the post method, you have to change the value of the attribute "method" to be Post.
Get method has maximum length restricted to 256 characters as it is sent appended with the URL, but the Post method hasn't.
Get method has limitataion in the size of data tranamitted, but post method hasn't.
GET Method:
- All the name value pairs are submitted as a query string in URL.
- It's not secured as it is visible in plain text format in the Location bar of the web browser.
- As the data transfers through address bar (URL) there are some restrictions in using space, some characters like ampersand (&) etc in the GET method of posting data. We have to take special care for encoding data if such special characters are present.
- Length of the string is restricted.
- If method is not mentioned in the Form tag, this is the default method used.
- If get method is used and if the page is refreshed it would not prompt before the request is submitted again.
- One can store the name value pairs as bookmark and directly be used while sharing with others - example search results.
- Data is always submitted in the form of text
- If the response of the page is always same for the posted query then use GET example database searches
- All the name value pairs are submitted in the Message Body of the request.
- Length of the string (amount of data submitted) is not restricted.
- Post Method is secured because Name-Value pairs cannot be seen in location bar of the web browser.
- If post method is used and if the page is refreshed it would prompt before the request is resubmitted.
- If the service associated with the processing of a form has side effects (for example, modification of a database or subscription to a service), the method should be POST.
- Data is submitted in the form as specified in enctype attribute of form tag and thus files can be used in FileUpload input box.
GET and POST methods are both ways of transporting variables (and their values) from one page to another. However, they transport the variable names and values in different ways. GET uses the URL to transfer variables. Web pages can pick up the URL address and detach the variables usable to the scripting language used in the page. A user can change the variable names and values of a URL with GET-type variables. This introduces security risks, as it is an open way to attack a website. All variables that could possibly be input by a user should always be checked. GET values must be under 255 characters, otherwise some older browsers will not transfer values properly. Today's browsers propagate values just fine with larger character limits, such as 4,000 - but caution should be taken. POST transfers variables from one page to the next - broadly speaking - silently. No users can edit these variables without simulating a POST transfer to the page - which is a more difficult route for site attackers to make. These variables should still always be checked. POST values can be of infinite length.
Get and Post are two different ways of passing data from your web application screen and the servlet.
When you submit your web page (form) the data would reach the servlet in either of the two ways Get and Post. The methods doGet() and doPost() are servlet specific action methods that can handle the submit actions. If you have specified your form submission type as Get then the doGet() would be invoked and if you have specified as Post the doPost() would be invoked.
1) HTTP GET: In HTTP GET method data passed through URL querystring using name value pair. It's simpler and you can troubleshoot any problems simply by looking at the address bar in your browser because all values passed are displayed there. This is also the primary weakness of this method.
2) HTTP POST: In HTTP POST request data are embeded in a HTTP HEADER. So data are NOT visible to end user while you can see the data passed in HTTP GET method. So if you want to pass sensitive information/data, you should have to use HTTP POST request. Another advantage is that you can send larger amounts of information compare to HTTP GET method.
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Which HTTP methods data is not cached in the browsers URL history?
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Code for post and get in HTML form?
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