package session-redis-lwt

  1. Overview
  2. Docs
A session manager for your everyday needs - Redis-specific support for Lwt

Install

Dune Dependency

Authors

Maintainers

Sources

0.5.0.tar.gz
sha256=bac89b05335fae06ba4d060687aa28578977a296cb46344784f16df1ba1f2360
md5=96a6cf425da69c010ecef492af339e8c

Description

Published: 14 Aug 2021

README

ocaml-session

ocaml-session is an session manager that handles cookie headers and backend storage for HTTP servers. The library supports CoHTTP and Webmachine; Async and Lwt; and pluggable backing stores based on a functor interface.

Installation

Install the library and its depenencies via OPAM:

opam install session

Basic Usage

Below is a simplified implementation of session-based user authentication, one of the most common use-cases of sessions. The server will respond with 401 Unauthorized for every path until the client visits /authenticate, after which all paths will respond with 200 OK.

module Session = struct
  module Backend = Session_postgresql_lwt
  include Session
  include Session_cohttp_lwt.Make(Backend)
end

let cookie_key = "__session"

let callback conn { Request.headers; uri } body =
  Session.of_header backend cookie_key headers
  >>= function
    | Ok (Some session) when authorized session ->
      Server.respond ~status:`OK ()
    | _ ->
      if Uri.path = "/authenticate" then
        let session = Session.generate backend "<user_id>" in
        let headers = Header.of_list (Session.to_cookie_hdrs cookie_key session) in
        Server.respond ~headers ~status:`OK ()
      else
        Server.respond ~status:`Unauthorized ()

There are additional examples for both CoHTTP and webmachine in the examples subdirectory of this project. These examples use a session to count the number of HTTP requests that the server has received from a client. To build them, reconfigure the build to enable examples, an i/o library of our choice (e.g., Async or Lwt), as well as the library you're using to build your server (e.g., CoHTTP or Webmachine):

./configure --enable-examples --enable-async --enable-cohttp
make

Development

To install development versions of the library, pin the package from the root of the repository:

opam pin add .

You can install the latest changes by committing them to the local git repository and running:

opam upgrade session

For building and running the tests during development, you will need to install the oUnit package and reconfigure the build process to enable tests:

opam install oUnit
./configure --enable-tests
make && make test

License

BSD3, see LICENSE file for its text.

Dependencies (4)

  1. redis-lwt
  2. session >= "0.4.2"
  3. dune >= "1.0"
  4. ocaml >= "4.07.0"

Dev Dependencies

None

Used by (1)

  1. datakit-ci >= "0.12.0"

Conflicts

None

OCaml

Innovation. Community. Security.