server

Documentation

Overview

Package server implements an HTTPS web server. The configuration is idiosyncratic, and not intended to be suitable for everyone.

Index

• func Country(r *http.Request) (loc string)
• func Location(r *http.Request) (loc string)
• func Registered(r *http.Request) (loc string)
• func RemoteIP(r *http.Request) (ip string)
• type App
• type GeoBlocker
  • func (gb *GeoBlocker) GeoBlock(next http.Handler) http.Handler
  • func (gb *GeoBlocker) Locate(ipStr string) (country, registered string, ip net.IP)
  • func (gb *GeoBlocker) RejectsCounted() (rejects int)
  • func (gb *GeoBlocker) Start(countries []string)
  • func (gb *GeoBlocker) Stop()
• type Server
  • func (srv *Server) Serve(app App)

Functions

func Country

func Country(r *http.Request) (loc string)

Country returns the location country code for the current request.

func Location

func Location(r *http.Request) (loc string)

Location returns both the registered and location country codes for the current request, if they are different.

func Registered

func Registered(r *http.Request) (loc string)

Registered returns the registered country codes for the current request.

func RemoteIP

func RemoteIP(r *http.Request) (ip string)

RemoteIP returns the originating IP address for the current request.

Types

type App

type App interface {

	// Routes registers handlers for web request paths.
	Routes() http.Handler
}

App is the interface provided by the web application.

type GeoBlocker

type GeoBlocker struct {
	Allow        bool // permit only specified countries, instead of blocking them
	ErrorLog     *log.Logger
	Reporter     func(r *http.Request, location string, ip net.IP) string
	ReportSingle bool   // report just location or registered country, not both
	Store        string // storage location for database
	// contains filtered or unexported fields
}

GeoBlocker holds the parameters and state for geo-blocking. Typically only one is needed.

func (*GeoBlocker) GeoBlock

func (gb *GeoBlocker) GeoBlock(next http.Handler) http.Handler

GeoBlock initialises and returns a handler to block IPs for some locations.

func (*GeoBlocker) Locate

func (gb *GeoBlocker) Locate(ipStr string) (country, registered string, ip net.IP)

Locate looks up a remote address in the geolocation database, and returns the countries of origin and registration.

func (*GeoBlocker) RejectsCounted

func (gb *GeoBlocker) RejectsCounted() (rejects int)

RejectsCounted returns a statistic of the total number of requests rejected, and resets the count.

func (*GeoBlocker) Start

func (gb *GeoBlocker) Start(countries []string)

Start initialises the geo-blocker.

func (*GeoBlocker) Stop

func (gb *GeoBlocker) Stop()

Stop ends geo-blocking.

type Server

type Server struct {

	// logging
	ErrorLog *log.Logger
	InfoLog  *log.Logger

	// HTTPS
	CertEmail string   // notifications from Let's Encrypt
	CertPath  string   // folder for certificates
	Domains   []string // domains to be served (empty for HTTP)

	// port addresses
	AddrHTTP  string
	AddrHTTPS string
}

Server specifies the parameters for a web server.

func (*Server) Serve

func (srv *Server) Serve(app App)

Serve runs the web server. It never returns.