What is an HTTP proxy? How does it work?

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An HTTP proxy is a server that accepts HTTP requests and forwards them to another server. The proxy server can intercept, modify, or filter requests, as well as respond to client requests. The working principle of HTTP proxy involves the following key steps: the client sends the request, connects to the proxy server, the proxy server receives the request, establishes a connection to the target server, forwards the request, the target server processes the request, the proxy server receives the response, and finally returns the response to the client
The proxy server provides the client with the transfer access to the target server in the HTTP communication. It can be divided into forward proxy, reverse proxy and transparent proxy.
HTTPS proxies typically use the CONNECT method, which establishes a tunnel through the proxy so that the proxy cannot decrypt the data.
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