Vad gör http
En hemsida som använder HTTP ger en mycket mindre säker uppkoppling och riskerna för att kunddata nås av utomstående ökar drastiskt. It's the communication protocol you use when you browse the web. At a fundamental level, when you visit a website, your browser makes an HTTP request to a server. Then that server responds with a resource an image, video, or the HTML of a web page - which your browser then displays for you.
Stateless means that all requests are separate from each other. So each request from your browser must contain enough information on its own for the server to fulfill the request.
An overview of HTTP
That also means that each transaction of the message based model of HTTP is processed separately from the others. It is also one of most important and useful concepts. A URL is a web address used to identify resources on the Web. The idea of the web is structured around resources. Example of an URL. Path —Specifies the resource location on the server.
It uses the same logic as a resource location used on the device where you are reading this article i. URI is sometimes being used instead of URL but mostly in formal specifications and by people who want to show off. Additionally, the request needs a method. The four main HTTP methods are:. All HTTP messages have one or more headers, followed by an optional message body.
The body contains the data that will be sent with the request or the data received with the response. That means it sends parameters of the requested resource. GET requests do not change the state of resource. Think of this as a way to "edit" something. But the return will contain same headers as if GET was used. The response will contain in its body the exact content of the request message.
Representational state transfer REST is an architecture style where requests and responses contain representations of the current state of the systems resource. You can learn more about REST here if you're curious. We already talked about the first line in HTTP requests and responses, and body function was mentioned too. Now we'll talk about HTTP headers. The HTTP headers are added after the first line and are defined as name:value pairs separated by a colon.
HTTP headers are used to send additional parameters along with the request or response. As I already said, the body of the message includes the data to be sent with the request or the data received along with the response. There are different types of headers that are grouped based on their usage into 4 broad categories:.
Så här fixar du ett 403 Förbjudet-fel på din webbplats
Types of headers. Browsing the web, you may have encountered " error: not found" pages or " errors: server is not responding" pages. HTTPS provides encrypted communication between a browser client and the website server. Asymmetric encryption systems use a public key encryption key and a private key decryption keys to encrypt a message. Anyone can use the public key to encrypt a message.
However, private keys are secret, and that means that only the intended receiver can decrypt the message. Example of asymmetric encryption system. As you probably noticed, when a trusted secure tunnel is used during in a HTTPS connection, the green padlock icon is displayed in the browsers address bar. Example of one of my secure pages. Thank you for reading! Check out more articles like this on my freeCodeCamp profile.
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