Fix for #1164 - allow only one header per line (#1280)

* Fix for #1164 - allow only one header per line

* Include original reporter case

caddyhttp/header/setup.go

@@ -60,8 +60,12 @@ func headersParse(c *caddy.Controller) ([]Rule, error) {
 			name := c.Val()
 			value := ""
 
-			if c.NextArg() {
-				value = c.Val()
+			args := c.RemainingArgs()
+
+			if len(args) > 1 {
+				return rules, c.ArgErr()
+			} else if len(args) == 1 {
+				value = args[0]
 			}
 
 			head.Headers.Add(name, value)

caddyhttp/header/setup_test.go

@@ -45,13 +45,25 @@ func TestHeadersParse(t *testing.T) {
 					"Foo": []string{"Bar Baz"},
 				}},
 			}},
-		{`header /bar { Foo "Bar Baz" Baz Qux }`,
+		{`header /bar {
+			Foo "Bar Baz"
+			Baz Qux
+			Foobar
+		}`,
 			false, []Rule{
 				{Path: "/bar", Headers: http.Header{
 					"Foo":    []string{"Bar Baz"},
 					"Baz":    []string{"Qux"},
+					"Foobar": []string{""},
 				}},
 			}},
+		{`header /foo {
+				Foo Bar Baz
+			}`, true,
+			[]Rule{}},
+		{`header /foo {
+				Test "max-age=1814400";
+			}`, true, []Rule{}},
 	}
 
 	for i, test := range tests {