WIP: Add UNIX socket support.

config.yaml

@@ -5,9 +5,13 @@
 name: Test
 
 # The address and port to bind on.
-# address: "[::]"
+address: "[::]"
 port: 5000
 
+# Alternatively, lurkcoin can bind on a UNIX domain socket.
+# network_protocol: unix
+# address: "/tmp/lurkcoin.sock"
+
 # TLS (optional).
 tls:
     enable: false

lurkcoin/api/config.go

@@ -25,6 +25,7 @@ import (
 	"log"
 	"lurkcoin"
 	"lurkcoin/databases"
+	"net"
 	"net/http"
 	"os"
 	"strings"
@@ -35,6 +36,10 @@ type Config struct {
 	// the default server name for the v2 API.
 	Name string `yaml:"name"`
 
+	// The network protocol to use when binding to the socket. Defaults to
+	// "tcp", can be set to "unix" for example.
+	NetworkProtocol string `yaml:"network_protocol"`
+
 	// The address to bind to (optional) and port.
 	Address string `yaml:"address"`
 	Port    uint16 `yaml:"port"`
@@ -115,17 +120,45 @@ func StartServer(config *Config) {
 
 	router := MakeHTTPRouter(db, config)
 
-	address := fmt.Sprintf("%s:%d", config.Address, config.Port)
-	urlAddress := address
-	if config.Address == "" {
+
+	var address, networkProtocol, urlAddress string
+	switch config.NetworkProtocol {
+	case "", "tcp":
+		if config.Port == 0 {
+			address = config.Address
+		} else {
+			address = fmt.Sprintf("%s:%d", address, config.Port)
+		}
+		networkProtocol = "tcp"
+		urlAddress = address
+		if address != "" && address[0] == ':' {
 			urlAddress = "[::]" + urlAddress
 		}
+	case "unix":
+		address = config.Address
+		networkProtocol = "unix"
+		urlAddress = "unix:" + address + ":"
+		if config.Port != 0 {
+			log.Fatal("The port option is invalid with UNIX sockets.")
+		}
+	default:
+		log.Fatalf("Unrecognised network protocol: %q", config.NetworkProtocol)
+	}
+
 	if config.TLS.Enable {
 		log.Printf("Starting server on https://%s/", urlAddress)
 	} else {
 		log.Printf("Starting server on http://%s/", urlAddress)
 	}
 
+	// Bind to the address
+	var ln net.Listener
+	ln, err = net.Listen(networkProtocol, address)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Switch to the logfile
 	if config.Logfile != "" {
 		f, err := os.OpenFile(
 			config.Logfile,
@@ -151,10 +184,11 @@ func StartServer(config *Config) {
 		server.SetKeepAlivesEnabled(false)
 	}
 
+	// Serve the webpage
 	if config.TLS.Enable {
-		err = server.ListenAndServeTLS(config.TLS.CertFile, config.TLS.KeyFile)
+		err = server.ServeTLS(ln, config.TLS.CertFile, config.TLS.KeyFile)
 	} else {
-		err = server.ListenAndServe()
+		err = server.Serve(ln)
 	}
 
 	log.Fatal(err)

lurkcoin/misc.go

@@ -35,7 +35,7 @@ import (
 )
 
 const SYMBOL = "¤"
-const VERSION = "3.0.0"
+const VERSION = "3.0.1 alpha"
 
 // Note that public source code is required by the AGPL
 const SOURCE_URL = "https://github.com/luk3yx/lurkcoin-core"