server

package
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 Go to latest Published: Oct 22, 2020 License: MIT Imports: 15 Imported by: 61

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 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 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 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

View all Source files

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