2021-03-21 13:12:09 +03:00
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+++
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noatcards = True
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isdraft = False
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2021-03-27 13:16:09 +03:00
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weight = 161
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2021-03-21 13:12:09 +03:00
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+++
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# Hypertext transfer protocol (HTTP)
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## Introduction about HTTP
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HTTP is a method for encoding and transporting data between a client and a server. It is a request/response protocol:
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clients issue requests and servers issue responses with relevant content and completion status info about the request.
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HTTP is self-contained, allowing requests and responses to flow through many intermediate routers and servers that
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perform load balancing, caching, encryption, and compression.
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A basic HTTP request consists of a verb (method) and a resource (endpoint) . Below are common HTTP verbs:
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2021-03-21 13:55:58 +03:00
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| Verb | Description | Idempotent\* | Safe | Cacheable |
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2021-03-21 13:12:09 +03:00
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|---|---|---|---|---|
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| GET | Reads a resource | Yes | Yes | Yes |
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| POST | Creates a resource or trigger a process that handles data | No | No | Yes if response contains freshness info |
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| PUT | Creates or replace a resource | Yes | No | No |
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| PATCH | Partially updates a resource | No | No | Yes if response contains freshness info |
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| DELETE | Deletes a resource | Yes | No | No |
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HTTP is an application layer protocol relying on lower-level protocols such as TCP and UDP.
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- [HTTP](https://www.nginx.com/resources/glossary/http/)
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- [README](https://www.quora.com/What-is-the-difference-between-HTTP-protocol-and-TCP-protocol)
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