π Internet β The internet is the network that allows clients and servers to exchange information. It acts as the medium through which requests and responses travel.
π₯οΈ Client β In web interactions, the client is typically a web browser that sends requests to a server. The client initiates the communication by sending an HTTP request.
ποΈ Server β The server receives requests from the client and processes them to generate a response. It acts as the producer of the requested information.
π HTTP Request/Response Cycle β This cycle involves the client sending a request to the server, which processes it and sends back a response. This is the fundamental process of web communication.
π HTTP Verbs β Common HTTP verbs include GET, POST, PUT, PATCH, and DELETE, which define the action to be performed on the resource identified by the URI.
HTTP Request Components
π€ URL β The Uniform Resource Locator specifies the address of the resource on the web. It is a key component of the HTTP request.
π Verb β The HTTP verb indicates the action to be performed, such as GET for retrieving data or POST for submitting data.
π€οΈ Path β The path specifies the specific resource being requested, such as '/tasks' or '/items/6/reviews'.
π Headers β These provide additional information about the request, such as content type and authentication details.
π¦ Body β In some requests, especially POST and PUT, the body contains data to be sent to the server.
Server Processing Steps
π Connection β The server accepts the connection from the client, often through a TCP handshake.
π Parsing β The server parses the HTTP request to understand the client's needs.
π Authentication β The server may authenticate the request to ensure it is from a legitimate source.
ποΈ Data Retrieval β The server retrieves the requested data from its database or other resources.
π οΈ Processing β The server processes the data, applying any necessary business logic or transformations.
HTTP Response Details
π Status Code β The response includes a status code indicating the result of the request, such as 200 for success or 404 for not found.
π Headers β Response headers provide metadata about the response, such as content type and length.
π¦ Body β The body contains the actual data requested by the client, such as HTML, JSON, or XML.
π Caching β Responses may include caching directives to optimize future requests.
π Security β Responses may include security headers to protect against threats like cross-site scripting.
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