add a code to bind on unix sockets

use "listen: 'unix:sinopia.sock'" for this

conf/full.yaml

@@ -91,6 +91,7 @@ packages:
 # - 0.0.0.0:4873              # listen on all addresses (INADDR_ANY)
 # - https://example.org:4873  # if you want to use https
 # - [::1]:4873                # ipv6
+# - unix:/tmp/sinopia.sock    # unix socket
 
 # Configure HTTPS, it is required if you use "https" protocol above.
 #https:

lib/cli.js

@@ -77,16 +77,16 @@ function get_listen_addresses() {
   }
 
   addresses = addresses.map(function(addr) {
-    addr = Utils.parse_address(addr)
+    var parsed_addr = Utils.parse_address(addr)
 
-    if (!addr) {
+    if (!parsed_addr) {
       logger.logger.warn({ addr: addr },
          'invalid address - @{addr}, we expect a port (e.g. "4873"),'
        + ' host:port (e.g. "localhost:4873") or full url'
        + ' (e.g. "http://localhost:4873/")')
     }
 
-    return addr
+    return parsed_addr
 
   }).filter(Boolean)
 
@@ -142,19 +142,25 @@ function afterConfigLoad() {
     }
 
     webServer
-      .listen(addr.port, addr.host)
+      .listen(addr.port || addr.path, addr.host)
       .on('error', function(err) {
         logger.logger.fatal({ err: err }, 'cannot create server: @{err.message}')
         process.exit(2)
       })
 
     logger.logger.warn({
-      addr: URL.format({
-        protocol: addr.proto,
-        hostname: addr.host,
-        port: addr.port,
-        pathname: '/',
-      }),
+      addr: ( addr.path
+            ? URL.format({
+                protocol: 'unix',
+                pathname: addr.path,
+              })
+            : URL.format({
+                protocol: addr.proto,
+                hostname: addr.host,
+                port: addr.port,
+                pathname: '/',
+              })
+            ),
       version: 'Sinopia/'+pkg.version,
     }, 'http address - @{addr}')
   })

lib/utils.js

@@ -126,23 +126,34 @@ module.exports.parse_address = function parse_address(addr) {
   //
   // Allow:
   //
-  //  - https:localhost:1234   - protocol + host + port
-  //  - localhost:1234         - host + port
-  //  - 1234                   - port
-  //  - http::1234             - protocol + port
-  //  - https://localhost:443/ - full url + https
-  //  - http://[::1]:443/      - ipv6
+  //  - https:localhost:1234        - protocol + host + port
+  //  - localhost:1234              - host + port
+  //  - 1234                        - port
+  //  - http::1234                  - protocol + port
+  //  - https://localhost:443/      - full url + https
+  //  - http://[::1]:443/           - ipv6
+  //  - unix:/tmp/http.sock         - unix sockets
+  //  - https://unix:/tmp/http.sock - unix sockets (https)
+  //
+  // TODO: refactor it to something more reasonable?
   //
   //        protocol :  //      (  host  )|(    ipv6     ):  port  /
   var m = /^((https?):(\/\/)?)?((([^\/:]*)|\[([^\[\]]+)\]):)?(\d+)\/?$/.exec(addr)
 
-  if (!m) return null
-
-  return {
+  if (m) return {
     proto: m[2] || 'http',
     host:  m[6] || m[7] || 'localhost',
     port:  m[8] || '4873',
   }
+
+  var m = /^((https?):(\/\/)?)?unix:(.*)$/.exec(addr)
+
+  if (m) return {
+    proto: m[2] || 'http',
+    path:  m[4],
+  }
+
+  return null
 }
 
 // function filters out bad semver versions and sorts the array

test/unit/listen_addr.js

@@ -6,12 +6,17 @@ describe('Parse address', function() {
     it(what, function() {
       if (proto === null) {
         assert.strictEqual(parse(what), null)
-      } else {
+      } else if (port) {
         assert.deepEqual(parse(what), {
           proto: proto,
           host: host,
           port: port,
         })
+      } else {
+        assert.deepEqual(parse(what), {
+          proto: proto,
+          path: host,
+        })
       }
     })
   }
@@ -26,7 +31,12 @@ describe('Parse address', function() {
   addTest('[::1]:4873', 'http', '::1', '4873')
   addTest('https:[::1]:4873', 'https', '::1', '4873')
 
+  addTest('unix:/tmp/foo.sock', 'http', '/tmp/foo.sock')
+  addTest('http:unix:foo.sock', 'http', 'foo.sock')
+  addTest('https://unix:foo.sock', 'https', 'foo.sock')
+
   addTest('blah', null)
   addTest('blah://4873', null)
   addTest('https://blah:4873///', null)
+  addTest('unix:1234', 'http', 'unix', '1234') // not unix socket
 })