resty.session

• Index

Contents

• Configuration
• Constructors
• Storage
• Database

Modules

• resty.session
• resty.session.dshm
• resty.session.file
• resty.session.file.thread
• resty.session.file.utils
• resty.session.memcached
• resty.session.mysql
• resty.session.postgres
• resty.session.redis
• resty.session.redis.cluster
• resty.session.redis.common
• resty.session.redis.sentinel
• resty.session.shm
• resty.session.utils

Module resty.session.postgres

Postgres backend for session library.

Configuration

configuration

Postgres storage backend configuration

Constructors

module.new ([configuration])

Create a Postgres storage.

Storage

instance:set (name, key, value, ttl, current_time[, old_key], stale_ttl[, metadata])	Store session data.
instance:get (name, key)	Retrieve session data.
instance:delete (name, key[, metadata])	Delete session data.
instance:read_metadata (name, audience, subject, current_time)	Read session metadata.

Database

sessions	Sessions table.
metadata	Sessions metadata table.

Configuration

configuration

Postgres storage backend configuration

Fields:

• host The host to connect (defaults to "127.0.0.1").
• port The port to connect (defaults to 5432).
• application Set the name of the connection as displayed in pgstatactivity (defaults to "pgmoon").
• username The database username to authenticate (defaults to "postgres").
• password Password for authentication, may be required depending on server configuration.
• database The database name to connect.
• table_name Name of database table to which to store session data (can be database schema prefixed) (defaults to "sessions").
• table_name_meta Name of database meta data table to which to store session meta data (can be database schema prefixed) (defaults to "sessions_meta").
• connect_timeout Controls the default timeout value used in TCP/unix-domain socket object's connect method.
• send_timeout Controls the default timeout value used in TCP/unix-domain socket object's send method.
• read_timeout Controls the default timeout value used in TCP/unix-domain socket object's receive method.
• keepalive_timeout Controls the default maximal idle time of the connections in the connection pool.
• pool A custom name for the connection pool being used.
• pool_size The size of the connection pool.
• backlog A queue size to use when the connection pool is full (configured with @pool_size).
• ssl Enable SSL (defaults to false).
• ssl_verify Verify server certificate (defaults to nil).
• ssl_required Abort the connection if the server does not support SSL connections (defaults to nil).

Constructors

module.new ([configuration])

Create a Postgres storage.

This creates a new Postgres storage instance.

Parameters:

• configuration table postgres storage configuration (optional)

Returns:

table postgres storage instance

Storage

instance:set (name, key, value, ttl, current_time[, old_key], stale_ttl[, metadata])

Store session data.

Parameters:

• name string cookie name
• key string session key
• value string session value
• ttl number session ttl
• current_time number current time
• old_key string old session id (optional)
• stale_ttl string stale ttl
• metadata table table of metadata (optional)

Returns:

1. true or nil ok
2. string error message

instance:get (name, key)

Retrieve session data.

Parameters:

• name string cookie name
• key string session key

Returns:

1. string or nil session data
2. string error message

instance:delete (name, key[, metadata])

Delete session data.

Parameters:

• name string cookie name
• key string session key
• metadata table session meta data (optional)

Returns:

1. boolean or nil session data
2. string error message

instance:read_metadata (name, audience, subject, current_time)

Read session metadata.

Parameters:

• name string cookie name
• audience string session key
• subject string session key
• current_time number current time

Returns:

1. table or nil session metadata
2. string error message

Database

sessions

Sessions table.

Database table that stores session data.

Usage:

CREATE TABLE IF NOT EXISTS sessions (
  sid  TEXT PRIMARY KEY,
  name TEXT,
  data TEXT,
  exp  TIMESTAMP WITH TIME ZONE
);
CREATE INDEX ON sessions (exp);

metadata

Sessions metadata table.

This is only needed if you want to store session metadata.

Usage:

CREATE TABLE IF NOT EXISTS sessions_meta (
  aud TEXT,
  sub TEXT,
  sid TEXT REFERENCES sessions (sid) ON DELETE CASCADE ON UPDATE CASCADE,
  PRIMARY KEY (aud, sub, sid)
);