A curated list of awesome middleware and adapters for Faraday. If you want your adapter or middleware to feature in this list, please open a discussion or a PR.

Faraday allows you to change the adapter, the element in the stack responsible for performing the HTTP request, with ease, by the combination of a standardised API to provide configuration and request details, and a powerful set of middleware. However, each adapter can also offer unique features, or lack the support for others. The following table show the available adapters and which features they support.

Under the hood, Faraday uses a Rack-inspired middleware stack for making requests. Much of Faraday’s power is unlocked with custom middleware. Some middleware is included with Faraday, and others are in external gems. Learn more about Middleware.

In addition to this curated list of middleware, we would like to specifically call your attention to middleware that is helpful for general HTTP use:

• encode_xml - encode XML requests (responses decoding is included in faraday_middleware gem)
• encoding - required for handling UTF-8 responses
• follow_redirects - follow HTTP 30X redirects
• json_request and json_response - encode/decode JSON requests and responses
• retry - retry intermittent HTTP failures
• url_encoded - encode request body as a url-encoded form upload

• cookie_jar - support for HTTP cookies
• detailed_logger - robust logging for requests & responses
• encoding - required for handling UTF-8 responses
• http_cache - standards compliant cache that works with ActiveSupport::Cache
• gzip - decompress responses (needed for some non-default adapters)

• authorization - middleware for the Authorization HTTP header
• basic_authentication - HTTP basic auth
• instrumentation - instrument requests using ActiveSupport::Notifications or similar
• logger - log request and response
• raise_error - raises exception on 4xx or 5xx
• token_authentication - HTTP token authentication
• url_encoded - encode request body as a url-encoded form upload
• json - encode/decode JSON requests and responses

• multipart - encode request body as a multipart form
• retry - retry intermittent HTTP failures
• rashify - parse responses into a Hashie::Mash::Rash
• follow_redirects - follow HTTP 30X redirects

ATTENTION: faraday_middleware have been deprecated and won't be updated to work on Faraday 2.0. All the middleware below will need to be moved into their own gems.

• caching - simple cache that works with ActiveSupport::Cache
• chunked - support for HTTP Transfer-Encoding
• dates - parse ISO 8601 dates from response body
• follow_redirects - follow HTTP 30X redirects
• instrumentation - instruments requests using ActiveSupport::Notifications or similar
• json_fix - fix responses that insist on serving JSON with wrong mime types
• marshal - parse responses as marshalled ruby objects
• mashify - parse responses into a Hashie::Mash
• method_override - support for X-Http-Method-Override
• oauth/oauth2 - adds an oauth access token to each request
• rashify - parse responses into a Hashie::Rash
• xml - parse responses as XML
• yaml - parse responses as YAML

TBC