http : Add cookie module (#338)

http/cookie.ts

@@ -0,0 +1,21 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { ServerRequest } from "./server.ts";
+
+export interface Cookie {
+  [key: string]: string;
+}
+
+/* Parse the cookie of the Server Request */
+export function getCookie(rq: ServerRequest): Cookie {
+  if (rq.headers.has("Cookie")) {
+    const out: Cookie = {};
+    const c = rq.headers.get("Cookie").split(";");
+    for (const kv of c) {
+      const cookieVal = kv.split("=");
+      const key = cookieVal.shift().trim();
+      out[key] = cookieVal.join("");
+    }
+    return out;
+  }
+  return {};
+}

http/cookie_test.ts

@@ -0,0 +1,25 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { ServerRequest } from "./server.ts";
+import { getCookie } from "./cookie.ts";
+import { assertEquals } from "../testing/asserts.ts";
+import { test } from "../testing/mod.ts";
+
+test({
+  name: "[HTTP] Cookie parser",
+  fn(): void {
+    let req = new ServerRequest();
+    req.headers = new Headers();
+    assertEquals(getCookie(req), {});
+    req.headers = new Headers();
+    req.headers.set("Cookie", "foo=bar");
+    assertEquals(getCookie(req), { foo: "bar" });
+
+    req.headers = new Headers();
+    req.headers.set("Cookie", "full=of  ; tasty=chocolate");
+    assertEquals(getCookie(req), { full: "of  ", tasty: "chocolate" });
+
+    req.headers = new Headers();
+    req.headers.set("Cookie", "igot=99; problems=but...");
+    assertEquals(getCookie(req), { igot: "99", problems: "but..." });
+  }
+});

http/test.ts

@@ -1,4 +1,5 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import "./cookie_test.ts";
 import "./server_test.ts";
 import "./file_server_test.ts";
 import "./racing_server_test.ts";