Introduction

The Meziantou.Framework.Http.* packages add features to HttpClient that it does not have on its own. Most of them are a DelegatingHandler: you put it in the pipeline of a client, and every request that goes through the client gets the feature. The others parse HTTP formats.

What you can do with them

• Cache responses on the client, following the HTTP caching rules: freshness, validation with ETag and Last-Modified, Vary, No-Vary-Search, immutable and stale-if-error. Keep the cache in memory, in a file, in SQLite or in Redis. See Caching.
• Enforce HSTS: send the requests to the hosts that require HTTPS over HTTPS, even when the URL says http://, with the HSTS preload list built in. See HSTS.
• Block server-side request forgery when your application fetches URLs it does not control: reject the schemes, the IP addresses and the networks it must not reach, checked on every connection. See Server-side request forgery.
• Record and replay the traffic of an HttpClient in tests, to a JSON or a HAR file, with the secrets removed. See Recording.
• Parse Link headers (RFC 8288), for instance to follow pagination links. See Link headers.
• Verify credentials against an Apache htpasswd file. See Htpasswd files.

Packages

Each package is independent: install only the ones you need. The HAR files that the recording package reads and writes are described by the HttpArchive package.

Next steps

• Getting started: install a package and add a handler to an HttpClient.