CLOUDFLAREAPI: Adds CF_WORKER_ROUTE (#1243)

* CLOUDFLAREAPI: Adds CF_WORKER_ROUTE.

- CLOUDFLAREAPI: Initial support for CF_WORKER_ROUTE.
- Put CF_WORKER_ROUTE behind a per-domain feature-flag.
- Adds Integration Test.
- Create Cloudflare workers for tests.
- Updates documentation.

* Workaround for updateWorkerRoute causing stack overflow.

* Sets AccountID.

* Updates to latest master (Thanks @tresni!).

* Removes $CLOUDFLAREAPI_ACCOUNTNAME.

* Add alltrue() filter and -cfworkers flag

* Final workers changes

* alltrue() should be implemented like other filters.
* Update documentation.

Co-authored-by: Tom Limoncelli <tlimoncelli@stackoverflow.com>

pkg/js/helpers.js

@@ -722,7 +722,8 @@ function recordBuilder(type, opts) {
             // Handle D_EXTEND() with subdomains.
             if (d.subdomain &&
                 record.type != 'CF_REDIRECT' &&
-                record.type != 'CF_TEMP_REDIRECT') {
+                record.type != 'CF_TEMP_REDIRECT' &&
+                record.type != 'CF_WORKER_ROUTE') {
                 fqdn = [d.subdomain, d.name].join(".")
 
                 record.subdomain = d.subdomain;
@@ -856,6 +857,18 @@ var CF_TEMP_REDIRECT = recordBuilder('CF_TEMP_REDIRECT', {
     },
 });
 
+var CF_WORKER_ROUTE = recordBuilder('CF_WORKER_ROUTE', {
+    args: [
+        ['pattern', _validateCloudflareRedirect],
+        ['script', _validateCloudflareRedirect],
+    ],
+    transform: function(record, args, modifiers) {
+        record.name = '@';
+        record.target = args.pattern + ',' + args.script;
+    },
+});
+
+
 var URL = recordBuilder('URL');
 var URL301 = recordBuilder('URL301');
 var FRAME = recordBuilder('FRAME');

pkg/js/js_test.go

@@ -132,6 +132,7 @@ func TestErrors(t *testing.T) {
 		{"MX reversed", `D("foo.com","reg",MX("@","test.", 5))`},
 		{"CF_REDIRECT With comma", `D("foo.com","reg",CF_REDIRECT("foo.com,","baaa"))`},
 		{"CF_TEMP_REDIRECT With comma", `D("foo.com","reg",CF_TEMP_REDIRECT("foo.com","baa,a"))`},
+		{"CF_WORKER_ROUTE With comma", `D("foo.com","reg",CF_WORKER_ROUTE("foo.com","baa,a"))`},
 		{"Bad cidr", `D(reverse("foo.com"), "reg")`},
 		{"Dup domains", `D("example.org", "reg"); D("example.org", "reg")`},
 		{"Bad NAMESERVER", `D("example.com","reg", NAMESERVER("@","ns1.foo.com."))`},

pkg/js/parse_tests/036-dextendcf.js

@@ -5,6 +5,8 @@ D("foo.com", REG, DnsProvider(CF));
 D_EXTEND("sub.foo.com",
     A("test1.foo.com","10.2.3.1"),
     A("test2.foo.com","10.2.3.2"),
+    A("test3.foo.com","10.2.3.3"),
     CF_REDIRECT("test1.foo.com","https://goo.com/$1"),
-    CF_TEMP_REDIRECT("test2.foo.com","https://goo.com/$1")
+    CF_TEMP_REDIRECT("test2.foo.com","https://goo.com/$1"),
+    CF_WORKER_ROUTE("test3.foo.com","test-worker")
 );

pkg/js/parse_tests/036-dextendcf.json

@@ -24,6 +24,12 @@
           "target": "10.2.3.2",
           "type": "A"
         },
+        {
+          "name": "test3.foo.com.sub",
+          "subdomain": "sub",
+          "target": "10.2.3.3",
+          "type": "A"
+        },
         {
           "name": "@",
           "target": "test1.foo.com,https://goo.com/$1",
@@ -33,6 +39,11 @@
           "name": "@",
           "target": "test2.foo.com,https://goo.com/$1",
           "type": "CF_TEMP_REDIRECT"
+        },
+        {
+          "name": "@",
+          "target": "test3.foo.com,test-worker",
+          "type": "CF_WORKER_ROUTE"
         }
       ],
       "registrar": "Third-Party"

pkg/js/parse_tests/036-dextendcf/foo.com.zone

@@ -1,5 +1,7 @@
 $TTL 300
 ;@                IN CF_REDIRECT test1.foo.com,https://goo.com/$1
 ;@                IN CF_TEMP_REDIRECT test2.foo.com,https://goo.com/$1
+;@                IN CF_WORKER_ROUTE test3.foo.com,test-worker
 test1.foo.com.sub IN A    10.2.3.1
 test2.foo.com.sub IN A    10.2.3.2
+test3.foo.com.sub IN A    10.2.3.3

pkg/js/parse_tests/040-cfWorkerRoute.js

@@ -0,0 +1,3 @@
+D("foo.com","none",
+    CF_WORKER_ROUTE("test.foo.com","test-worker")
+);

pkg/js/parse_tests/040-cfWorkerRoute.json

@@ -0,0 +1,18 @@
+{
+  "registrars": [],
+  "dns_providers": [],
+  "domains": [
+    {
+      "name": "foo.com",
+      "registrar": "none",
+      "dnsProviders": {},
+      "records": [
+        {
+          "type": "CF_WORKER_ROUTE",
+          "name": "@",
+          "target": "test.foo.com,test-worker"
+        }
+      ]
+    }
+  ]
+}

pkg/js/parse_tests/040-cfWorkerRoute/foo.com.zone

@@ -0,0 +1,2 @@
+$TTL 300
+;@                IN CF_WORKER_ROUTE test.foo.com,test-worker