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What Is HTTP And HTTPS – The Difference and Everything you need to know

Today we learn what is HTTP and https. Have you noticed http:// or https:// in the address bar of a browser when browsing a website? Both of these are internet protocols. If none of these exist, most likely, it is http://. This question must have come to your mind at some point in time what are they, how do they work and what is the difference between HTTP and HTTPS. In this article, we have tried to give complete information about HTTP and HTTPS.

What is HTTP?

what is http

The full form of HTTP is “HyperText Transfer Protocol”. It is a type of network protocol that is used in the World Wide Web, where the protocol refers to the set of rules that are used during the exchange of information between the web browser and the server.

Whenever HTTP is written before the address of a website (eg http://www.rocoderes.com) then any type of data (such as text, image, audio, video file, etc.) is transferred between the web browser and the server. But they have to follow some rules and these rules are set by the HTTP protocol.

This protocol determines what will be the format of the data to be transferred, how it will be transmitted and the response of the browser and the server to different commands.

Nowadays there is no need to type HTTP in the browser because the browser uses HTTP by default, so when you enter the address of the website directly, it automatically comes in front of http://.

How does HTTP work?

HTTP is a request-response protocol that serves as a medium of communication between a client and a server. Here our web browser acts as a client and web-server like Apache or IIS as a server.

All the files are stored in the server and according to the request of the client, the server responds to the client. HTTP is a stateless protocol, that is, all the requests sent by the client are executed separately and after giving the response of the request, the connection is closed.

The client sends the request for the file that he needs to the server and after finding that file the server sends it to the client.

what is http and how does work

HTTP Request Message

To access any file, the client sends a request message to the server related to it, which is made up of the request line, header, and body (optional).

1. Request line:

It contains information about the request method, URL and HTTP version. There are many types of request type

  • GET: With this, the response is sent by the server.
  • POST: Through this data is sent to the server using HTML form.
  • HEAD: From this the response header is received.
  • PUT: To upload the resource.
  • PATCH: To edit the resource.
  • DELETE: To delete the resource.
  • TRACE: It would have been used to test the server.
  • URL: The address of any file or web page available on the server.
  • HTTP version: In this, it is defined which version of HTTP (HTTP 1.1 or HTTP 2) is being used.

2. Request Header Line:

Through this some additional information is sent such as date, user agent i.e. details of software program used by the client, referrer etc.

3. Message Body:

This is an optional field, through which a message can be sent as a comment.

HTTP Response Message

After receiving the request from the client side, the server has to respond according to the request. The Response message is made up of a status line, header lines and body.

1. Status line:

In this, the protocol version, status code and phrase are given.

  • Protocol version: It contains information about the current HTTP version.
  • Status code: This is a 3 digit code, it shows the status of the request.
  • Phrase: It defines the status code in the format of text.

2. Header line:

With this, some additional information is sent to the client. The body contains the file or document for which the client has requested. If the response contains an error message, the body is blank.

HTTP Error Codes

You must have encountered an error on your browser at some point during Internet surfing. Sometimes this becomes a big problem for us, especially when we do not understand the reason behind these errors.

To understand the errors related to HTTP, some error codes have been created, which are also called HTTP status codes, through which it helps us to understand the reason behind the error.

Some common error codes associated with HTTP are as follows:

  • 400 Bad File Request: This error code appears when our URL is wrong like using a capital letter instead of small, mistakes in typing symbols etc.
  • 401 Unauthorized: This error may occur due to entering the wrong password.
  • 403 Forbidden/Access Denied: When you are opening a page for which you do not have permission, then in such a situation this response code may appear.
  • 404 File Not Found: This is the most common error. When you are requesting for a file or document which is not available on the server, either it has been deleted or has been moved to some other location, then 404 error comes in such a situation.
  • 408 Request Timeout: This error mostly occurs when the speed of the server is slow or the size of the requested file is more.
  • 500 Internal Error: When there is some problem in the configuration of the server, then there is trouble in accessing the file and the status code of internal error appears.
  • 503 Service Unavailable: If there is a problem with the Internet connection, the server is busy, or the site has been moved to another address, then this type of error can come.

Why is HTTP not Secure?

Do you know that the HTTP protocol is not secure? Yes, data transferred through an HTTP connection is not secure, it can be easily hacked.

Let us know why HTTP is not secure: Data in HTTP is in unencrypted form, that is, in such a format that anyone can easily understand. The HTTP request can be read in the middle by a hacker.

Server identification is not required in HTTP, so the hacker can also respond on behalf of the server. Due to all these reasons, it is not secure, so sensitive information such as passwords, credit card details etc. are not transferred through HTTP.

What is HTTPS ?

what is http

The full form of HTTPS is “HyperText Transfer Protocol Secured”. It is a secure version of HTTP, it uses SSL (Secured Socket Layer) which transfers data between browser and server in encrypted form.

HTTPS has three main goals:

  • Privacy: Encrypting the data so that no middleman between the client and the server can read the data.
  • Integrity: To ensure that the data has not changed anywhere between the two ends.
  • Authentication: In this system, both the client-server have to prove their identities to each other, by this it is decided whether the communication is taking place and whether its identity is really what it is telling.

In HTTPS connection, all the data is encrypted by cryptography i.e. converted into a format which is difficult to decode without decryption key and similarly sensitive information being transferred is protected.

You must have seen https:// at the beginning of the URL of a website, this means that your data has been secured through SSL. You can see secure written in front of such URL in Chrome’s address bar with a lock icon in green color. Example:

  • https://www.facebook.com
  • https://www.canva.com/

How does HTTPS work?

As we have already told you that in HTTPS all the data is encrypted and transferred from one end to the other, so if you want to understand how HTTPS works then you have to understand the concept of cryptography for this.

What is Cryptography?

It is a method through which ordinary information (plan text) is converted into an unreadable format that only authorized users can read.

What are Public and Private Keys?

In cryptography, two types of keys are widely used to keep communication private and secure, one “public key” and the other “private key” which are used for data encryption and decryption.

There are some algorithms for this work from which keys are generated; The private key is kept with you and the public key is distributed publicly.

If someone wants to send you a secret message, he encrypts the message with the public key given by you, which you will have to decrypt with your private key to read it.

What is Session Key?

This is also a type of encryption decryption key which is generated randomly and remains valid for a certain session i.e. for a certain time and then its validity ends.

What is Symmetric Encryption?

When you encrypt both the user and the website through the same key, then it is called symmetric encryption and that key is called symmetric key.

How HTTPS encryption works

  • Let’s say you type the address of the Facebook website in the browser and press enter.
  • Your browser requests an HTTPS connection to Facebook’s server.
  • Facebook sends its public key to you and keeps the private key with itself.
  • Your browser generates a third key which is called the session key.
  • Your system encrypts the session key with the public key given by Facebook and sends it to Facebook.
  • Now Facebook’s server decrypts that session key with its private key. Now both your browser and the server have the session key available.
  • Now here the session key will act like a symmetric key and through symmetric encryption, your connection will be established till you close the site.

What is the difference between HTTP and HTTPS?

InventionAccording to Wikipedia, HTTP was discovered in 1989 by Tim Berners-Lee at CERN.Netscape Communications created HTTPS for its own Netscape Navigator web browser in 1994.
ProtocolHTTP uses a TCP / IP protocol.HTTPS also uses the same protocol as HTTP but uses an encrypted TLS/SSL connection.
URLThe URL associated with HTTP begins with http:// .The URL associated with HTTPS is from https://.
SecurityThe security of HTTP is very less, due to which hackers can easily steal its data.HTTPS uses a security layer so it is a secure protocol.
SSL Certificate
No SSL certificate is required to install Http.The website needs an SSL certificate to install https.
Http speed is much better than Https.Https speed is slow because it prepares an additional security layer. But you can also increase the speed of your website through this.
TrustIt is not trust worthy.You can trust https with confidence.
AMPAmp is not used with Http.To use Accelerated Mobile Pages ie Amp, you have to install HTTPS SSL.
HackingThere is scope for hacking in HTTP.The possibility of hacking in HTTPS is negligible.
PortUses HTTP Port 80.HTTPS uses port 443.
Ranking Factor
HTTP does not improve your website’s Google ranking.If the website is to rank on Google then you must use HTTPS.
Data Transfer
Whenever HTTP transfers data, it does not encrypt the data. this the chance of hacking increases.Whenever HTTPS encrypts data even before data transfer.
UseThis seems to be a new website that is under development.Most websites and blogs, use HTTPS so that the trust of the user remains.
LockThe browser shows a RED lock on a site that uses HTTP.The browser shows GREEN Lock on websites using HTTPS.
PaidIt is added to the website’s URL by default, so it does not have to be purchased.HTTPS needs to be purchased to be installed on any website.

so that’s all so guys today we learned what is HTTPS and HTTPS. how they work and what the difference between HTTP and HTTPS. HTTPS comes with many advantages, both performance and, most important, security wise. All browsers are strongly encouraging users to trust only websites implementing HTTPS because this is the single measure that can help them mitigate a variety of threats and attacks.

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Rocoderes is a blog you can learn HTML, CSS, JavaScript, React Js and Python along with creative coding stuff and free source code files.



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