2nd October 2019

w3schools

15

What is HTTP request and response?

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The Hypertext Transfer Protocol (HTTP) is designed to enable communications between clients and servers. HTTP works as a request-response protocol between a client and server. A web browser may be the client, and an application on a computer that hosts a web site may be the server.

So, what is difference between GET and POST method in HTTP protocol?

Both GET and POST method is used to transfer data from client to server in HTTP protocol but Main difference between POST and GET method is that GET carries request parameter appended in URL string while POST carries request parameter in message body which makes it more secure way of transferring data from client to

What is request response model?

Request–response, or request–reply, is one of the basic methods computers use to communicate with each other, in which the first computer sends a request for some data and the second computer responds to the request.

What is the difference between post and get?

By design, the POST request method requests that a web server accepts the data enclosed in the body of the request message, most likely for storing it. It is often used when uploading a file or when submitting a completed web form. In contrast, the HTTP GET request method retrieves information from the server.

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Why HTTP is stateless?

Because a stateless protocol does not require the server to retain session information or status about each communications partner for the duration of multiple requests. HTTP is a stateless protocol, which means that the connection between the browser and the server is lost once the transaction ends.

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What are the HTTP methods?

The HTTP verbs comprise a major portion of our “uniform interface” constraint and provide us the action counterpart to the noun-based resource. The primary or most-commonly-used HTTP verbs (or methods, as they are properly called) are POST, GET, PUT, PATCH, and DELETE.

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WHAT IS PUT method?

The POST method is used to request that the origin server accept the entity enclosed in the request as a new subordinate of the resource identified by the Request-URI in the Request-Line. In other words, POST is used to create. The PUT method requests that the enclosed entity be stored under the supplied Request-URI .

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What is an HTTP header?

HTTP headers. HTTP headers allow the client and the server to pass additional information with the request or the response. An HTTP header consists of its case-insensitive name followed by a colon ' : ', then by its value (without line breaks). IANA also maintains a registry of proposed new HTTP message headers.

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What is HTTP message format?

HTTP message format. An HTTP message contains components that are appropriate to its type. The bit stream containing headers and body is parsed and represented within the message tree when an input request is received by an HTTPInput node, or when a response from a Web service is received by the HTTPRequest node.

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What is an http message?

HTTP messages are how data is exchanged between a server and a client. There are two types of messages: requests sent by the client to trigger an action on the server, and responses, the answer from the server. HTTP messages are composed of textual information encoded in ASCII, and span over multiple lines.

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What is the https?

Hyper Text Transfer Protocol Secure (HTTPS) is the secure version of HTTP, the protocol over which data is sent between your browser and the website that you are connected to. The 'S' at the end of HTTPS stands for 'Secure'. It means all communications between your browser and the website are encrypted.

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What is the port used for HTTP?

Use in URLs. Port numbers are sometimes seen in web or other uniform resource locators (URLs). By default, HTTP uses port 80 and HTTPS uses port 443, but a URL like http://www.example.com:8080/path/ specifies that the web browser connects instead to port 8080 of the HTTP server.

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What is HTTP in networking?

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text.

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What is HTTP used for?

HTTP means HyperText Transfer Protocol. HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.

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How does the HTTP works?

The application protocol that makes the web work is Hypertext Transfer Protocol or HTTP. Do not confuse this with the Hypertext Markup Language (HTML). HTTP is the protocol that web browsers and web servers use to communicate with each other over the Internet.

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What do you mean by URL?

Definition: URL is an abbreviation that stands for "Universal Resource Locator." It's another name for a web address, the text that you type into your internet browser when you want to go to a website. A URL works like a house address. If you give someone a house address, they can navigate to find a home or business.

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What is the role of a Web server?

The basic function of a web server is to host websites and to deliver web content from its hosted websites over the internet. During the delivery of web pages, web servers follow a network protocol known as hyper text transfer protocol (HTTP).

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What is the definition for HTTP?

Definition of: HTTP. HTTP. (HyperText Transfer Protocol) The communications protocol used to connect to Web servers on the Internet or on a local network (intranet). Its primary function is to establish a connection with the server and send HTML pages back to the user's browser.

15

What is the use of GET and POST method in PHP?

GET can't be used to send binary data, like images or word documents, to the server. The data sent by GET method can be accessed using QUERY_STRING environment variable. The PHP provides $_GET associative array to access all the sent information using GET method. The POST method transfers information via HTTP headers.

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What is the use of HTTP headers?

HTTP header fields provide required information about the request or response, or about the object sent in the message body. There are four types of HTTP message headers: General-header: These header fields have general applicability for both request and response messages.

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What is the meaning of Idempotent?

Idempotence is a funky word that often hooks people. Idempotence is sometimes a confusing concept, at least from the academic definition. From a RESTful service standpoint, for an operation (or service call) to be idempotent, clients can make that same call repeatedly while producing the same result.

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What is the use of Session in PHP?

Sessions are a simple way to store data for individual users against a unique session ID. Session IDs are normally sent to the browser via session cookies and the ID is used to retrieve existing session data. The absence of an ID or session cookie lets PHP know to create a new session, and generate a new session ID.

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What is the difference between cookies and session?

The main difference between a session and a cookie is that session data is stored on the server, whereas cookies store data in the visitor's browser. Sessions are more secure than cookies as it is stored in server.Cookie can be turn off from browser.

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Can we use session in MVC?

The Controller in MVC is the major component for request processing and has its own lifecycle. Like ASP.NET WebForms, in MVC the Session property is provided by HttpContext class. But MVC has its own TempData object which is used to pass data across controllers.

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