server

package
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 Go to latest Published: Apr 23, 2023 License: MIT Imports: 17 Imported by: 0

Documentation

Overview

Package server provides an IMAP server.

Index

Constants

View Source 
const MinAutoLogout = 30 * time.Minute

The minimum autologout duration defined in RFC 3501 section 5.4.

Variables

View Source 
var (
	ErrAlreadyAuthenticated = errors.New("Already authenticated")
	ErrAuthDisabled         = errors.New("Authentication disabled")
)

IMAP errors in Not Authenticated state.

View Source 
var (
	ErrNoMailboxSelected = errors.New("No mailbox selected")
	ErrMailboxReadOnly   = errors.New("Mailbox opened in read-only mode")
)

imap errors in Selected state.

View Source 
var (
	ErrNotAuthenticated = errors.New("Not authenticated")
)

imap errors in Authenticated state.

Functions

func ErrNoStatusResp deprecated 

func ErrNoStatusResp() error

ErrNoStatusResp can be returned by a Handler to prevent the default status response from being sent.

Deprecated: Use imap.ErrStatusResp{nil} instead

func ErrStatusResp deprecated 

func ErrStatusResp(res *imap.StatusResp) error

ErrStatusResp can be returned by a Handler to replace the default status response. The response tag must be empty.

Deprecated: Use imap.ErrStatusResp{res} instead.

To disable the default status response, use imap.ErrStatusResp{nil} instead.

Types

type Append 

type Append struct {
	commands.Append
}

func (*Append) Handle 

func (cmd *Append) Handle(conn Conn) error

type Authenticate 

type Authenticate struct {
	commands.Authenticate
}

func (*Authenticate) Handle 

func (cmd *Authenticate) Handle(conn Conn) error

type Capability 

type Capability struct {
	commands.Capability
}

func (*Capability) Handle 

func (cmd *Capability) Handle(conn Conn) error

type Check 

type Check struct {
	commands.Check
}

func (*Check) Handle 

func (cmd *Check) Handle(conn Conn) error

type Close 

type Close struct {
	commands.Close
}

func (*Close) Handle 

func (cmd *Close) Handle(conn Conn) error

type Conn 

type Conn interface {
	io.Reader

	// Server returns this connection's server.
	Server() *Server
	// Context returns this connection's context.
	Context() *Context
	// Capabilities returns a list of capabilities enabled for this connection.
	Capabilities() []string
	// WriteResp writes a response to this connection.
	WriteResp(res imap.WriterTo) error
	// IsTLS returns true if TLS is enabled.
	IsTLS() bool
	// TLSState returns the TLS connection state if TLS is enabled, nil otherwise.
	TLSState() *tls.ConnectionState
	// Upgrade upgrades a connection, e.g. wrap an unencrypted connection with an
	// encrypted tunnel.
	Upgrade(upgrader imap.ConnUpgrader) error
	// Close closes this connection.
	Close() error
	WaitReady()

	Info() *imap.ConnInfo
	// contains filtered or unexported methods
}

Conn is a connection to a client.

type ConnExtension 

type ConnExtension interface {
	Extension

	// This function will be called when a client connects to the server. It can
	// be used to add new features to the default Conn interface by implementing
	// new methods.
	NewConn(c Conn) Conn
}

An extension that provides additional features to each connection.

type Context 

type Context struct {
	// This connection's current state.
	State imap.ConnState
	// If the client is logged in, the user.
	User backend.User
	// If the client has selected a mailbox, the mailbox.
	Mailbox backend.Mailbox
	// True if the currently selected mailbox has been opened in read-only mode.
	MailboxReadOnly bool
	// Responses to send to the client.
	Responses chan<- imap.WriterTo
	// Closed when the client is logged out.
	LoggedOut <-chan struct{}
}

Context stores a connection's metadata.

type Copy 

type Copy struct {
	commands.Copy
}

func (*Copy) Handle 

func (cmd *Copy) Handle(conn Conn) error

func (*Copy) UidHandle 

func (cmd *Copy) UidHandle(conn Conn) error

type Create 

type Create struct {
	commands.Create
}

func (*Create) Handle 

func (cmd *Create) Handle(conn Conn) error

type Delete 

type Delete struct {
	commands.Delete
}

func (*Delete) Handle 

func (cmd *Delete) Handle(conn Conn) error

type Expunge 

type Expunge struct {
	commands.Expunge
}

func (*Expunge) Handle 

func (cmd *Expunge) Handle(conn Conn) error

type Extension 

type Extension interface {
	// Get capabilities provided by this extension for a given connection.
	Capabilities(c Conn) []string
	// Get the command handler factory for the provided command name.
	Command(name string) HandlerFactory
}

An IMAP extension.

type Fetch 

type Fetch struct {
	commands.Fetch
}

func (*Fetch) Handle 

func (cmd *Fetch) Handle(conn Conn) error

func (*Fetch) UidHandle 

func (cmd *Fetch) UidHandle(conn Conn) error

type Handler 

type Handler interface {
	imap.Parser

	// Handle this command for a given connection.
	//
	// By default, after this function has returned a status response is sent. To
	// prevent this behavior handlers can use imap.ErrStatusResp.
	Handle(conn Conn) error
}

A command handler.

type HandlerFactory 

type HandlerFactory func() Handler

A function that creates handlers.

type Idle 

type Idle struct {
	commands.Idle
}

func (*Idle) Handle 

func (cmd *Idle) Handle(conn Conn) error

type List 

type List struct {
	commands.List
}

func (*List) Handle 

func (cmd *List) Handle(conn Conn) error

type Login 

type Login struct {
	commands.Login
}

func (*Login) Handle 

func (cmd *Login) Handle(conn Conn) error

type Logout 

type Logout struct {
	commands.Logout
}

func (*Logout) Handle 

func (cmd *Logout) Handle(conn Conn) error

type Move 

type Move struct {
	commands.Move
}

func (*Move) Handle 

func (h *Move) Handle(conn Conn) error

func (*Move) UidHandle 

func (h *Move) UidHandle(conn Conn) error

type Noop 

type Noop struct {
	commands.Noop
}

func (*Noop) Handle 

func (cmd *Noop) Handle(conn Conn) error

type Rename 

type Rename struct {
	commands.Rename
}

func (*Rename) Handle 

func (cmd *Rename) Handle(conn Conn) error

type SASLServerFactory 

type SASLServerFactory func(conn Conn) sasl.Server

A function that creates SASL servers. 

type Search struct {
	commands.Search
}

func (*Search) Handle 

func (cmd *Search) Handle(conn Conn) error

func (*Search) UidHandle 

func (cmd *Search) UidHandle(conn Conn) error

type Select 

type Select struct {
	commands.Select
}

func (*Select) Handle 

func (cmd *Select) Handle(conn Conn) error

type Server 

type Server struct {

	// TCP address to listen on.
	Addr string
	// This server's TLS configuration.
	TLSConfig *tls.Config
	// This server's backend.
	Backend backend.Backend
	// Backend updates that will be sent to connected clients.
	Updates <-chan backend.Update
	// Automatically logout clients after a duration. To do not logout users
	// automatically, set this to zero. The duration MUST be at least
	// MinAutoLogout (as stated in RFC 3501 section 5.4).
	AutoLogout time.Duration
	// Allow authentication over unencrypted connections.
	AllowInsecureAuth bool
	// An io.Writer to which all network activity will be mirrored.
	Debug io.Writer
	// ErrorLog specifies an optional logger for errors accepting
	// connections and unexpected behavior from handlers.
	// If nil, logging goes to os.Stderr via the log package's
	// standard logger.
	ErrorLog imap.Logger
	// The maximum literal size, in bytes. Literals exceeding this size will be
	// rejected. A value of zero disables the limit (this is the default).
	MaxLiteralSize uint32
	// contains filtered or unexported fields
}

An IMAP server.

func New 

func New(bkd backend.Backend) *Server

Create a new IMAP server from an existing listener.

func (*Server) Close 

func (s *Server) Close() error

Stops listening and closes all current connections.

func (*Server) Command 

func (s *Server) Command(name string) HandlerFactory

Command gets a command handler factory for the provided command name.

func (*Server) Enable 

func (s *Server) Enable(extensions ...Extension)

Enable some IMAP extensions on this server. Wiki entry: https://github.com/emersion/go-imap/wiki/Using-extensions

func (*Server) EnableAuth 

func (s *Server) EnableAuth(name string, f SASLServerFactory)

Enable an authentication mechanism on this server. Wiki entry: https://github.com/emersion/go-imap/wiki/Using-authentication-mechanisms

func (*Server) ForEachConn 

func (s *Server) ForEachConn(f func(Conn))

ForEachConn iterates through all opened connections.

func (*Server) ListenAndServe 

func (s *Server) ListenAndServe() error

ListenAndServe listens on the TCP network address s.Addr and then calls Serve to handle requests on incoming connections.

If s.Addr is blank, ":imap" is used.

func (*Server) ListenAndServeTLS 

func (s *Server) ListenAndServeTLS() error

ListenAndServeTLS listens on the TCP network address s.Addr and then calls Serve to handle requests on incoming TLS connections.

If s.Addr is blank, ":imaps" is used.

func (*Server) Serve 

func (s *Server) Serve(l net.Listener) error

Serve accepts incoming connections on the Listener l.

type StartTLS 

type StartTLS struct {
	commands.StartTLS
}

func (*StartTLS) Handle 

func (cmd *StartTLS) Handle(conn Conn) error

func (*StartTLS) Upgrade 

func (cmd *StartTLS) Upgrade(conn Conn) error

type Status 

type Status struct {
	commands.Status
}

func (*Status) Handle 

func (cmd *Status) Handle(conn Conn) error

type Store 

type Store struct {
	commands.Store
}

func (*Store) Handle 

func (cmd *Store) Handle(conn Conn) error

func (*Store) UidHandle 

func (cmd *Store) UidHandle(conn Conn) error

type Subscribe 

type Subscribe struct {
	commands.Subscribe
}

func (*Subscribe) Handle 

func (cmd *Subscribe) Handle(conn Conn) error

type Uid 

type Uid struct {
	commands.Uid
}

func (*Uid) Handle 

func (cmd *Uid) Handle(conn Conn) error

type UidHandler 

type UidHandler interface {
	Handler

	// Handle this command using UIDs for a given connection.
	UidHandle(conn Conn) error
}

A command handler that supports UIDs.

type Unselect 

type Unselect struct {
	commands.Unselect
}

func (*Unselect) Handle 

func (cmd *Unselect) Handle(conn Conn) error

type Unsubscribe 

type Unsubscribe struct {
	commands.Unsubscribe
}

func (*Unsubscribe) Handle 

func (cmd *Unsubscribe) Handle(conn Conn) error

type Upgrader 

type Upgrader interface {
	// Upgrade the connection. This method should call conn.Upgrade().
	Upgrade(conn Conn) error
}

A connection upgrader. If a Handler is also an Upgrader, the connection will be upgraded after the Handler succeeds.

This should only be used by libraries implementing an IMAP extension (e.g. COMPRESS).

Source Files

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