Better parse support for files with only an address line

config/parser.go

@@ -19,6 +19,7 @@ type (
 		other    []locationContext // tokens to be 'parsed' later by middleware generators
 		scope    *locationContext  // the current location context (path scope) being populated
 		unused   *token            // sometimes a token will be read but not immediately consumed
+		eof      bool              // if we encounter a valid EOF in a hard place
 	}
 
 	// locationContext represents a location context

config/parser_test.go

@@ -211,6 +211,53 @@ func TestParserBasicWithAlternateAddressStyles(t *testing.T) {
 			t.Fatalf("Expected root for conf of %s to be '/test/www', but got: %s", conf.Address(), conf.Root)
 		}
 	}
+
+	p = &parser{filename: "test"}
+	input = `host:port, http://host:port, http://host, https://host:port, host`
+	p.lexer.load(strings.NewReader(input))
+
+	confs, err = p.parse()
+	if err != nil {
+		t.Fatalf("Expected no errors, but got '%s'", err)
+	}
+	if len(confs) != 5 {
+		t.Fatalf("Expected 5 configurations, but got %d: %#v", len(confs), confs)
+	}
+
+	if confs[0].Host != "host" {
+		t.Errorf("Expected conf[0] Host='host', got '%#v'", confs[0])
+	}
+	if confs[0].Port != "port" {
+		t.Errorf("Expected conf[0] Port='port', got '%#v'", confs[0])
+	}
+
+	if confs[1].Host != "host" {
+		t.Errorf("Expected conf[1] Host='host', got '%#v'", confs[1])
+	}
+	if confs[1].Port != "port" {
+		t.Errorf("Expected conf[1] Port='port', got '%#v'", confs[1])
+	}
+
+	if confs[2].Host != "host" {
+		t.Errorf("Expected conf[2] Host='host', got '%#v'", confs[2])
+	}
+	if confs[2].Port != "http" {
+		t.Errorf("Expected conf[2] Port='http', got '%#v'", confs[2])
+	}
+
+	if confs[3].Host != "host" {
+		t.Errorf("Expected conf[3] Host='host', got '%#v'", confs[3])
+	}
+	if confs[3].Port != "port" {
+		t.Errorf("Expected conf[3] Port='port', got '%#v'", confs[3])
+	}
+
+	if confs[4].Host != "host" {
+		t.Errorf("Expected conf[4] Host='host', got '%#v'", confs[4])
+	}
+	if confs[4].Port != defaultPort {
+		t.Errorf("Expected conf[4] Port='%s', got '%#v'", defaultPort, confs[4].Port)
+	}
 }
 
 func TestParserImport(t *testing.T) {

config/parsing.go

@@ -38,18 +38,25 @@ func (p *parser) addresses() error {
 
 	// address gets host and port in a format accepted by net.Dial
 	address := func(str string) (host, port string, err error) {
+		var schemePort string
+
 		if strings.HasPrefix(str, "https://") {
-			port = "https"
-			host = str[8:]
-			return
+			schemePort = "https"
+			str = str[8:]
 		} else if strings.HasPrefix(str, "http://") {
-			port = "http"
-			host = str[7:]
-			return
+			schemePort = "http"
+			str = str[7:]
 		} else if !strings.Contains(str, ":") {
 			str += ":" + defaultPort
 		}
+
 		host, port, err = net.SplitHostPort(str)
+		if err != nil && schemePort != "" {
+			host = str
+			port = schemePort // assume port from scheme
+			err = nil
+		}
+
 		return
 	}
 
@@ -88,6 +95,10 @@ func (p *parser) addresses() error {
 		if !expectingAnother && p.line() > startLine {
 			break
 		}
+		if !hasNext {
+			p.eof = true
+			break // EOF
+		}
 	}
 
 	return nil
@@ -115,6 +126,12 @@ func (p *parser) addressBlock() error {
 	})
 	p.scope = &p.other[0]
 
+	if p.eof {
+		// this happens if the Caddyfile consists of only
+		// a line of addresses and nothing else
+		return nil
+	}
+
 	err := p.directives()
 	if err != nil {
 		return err