From 0f141e09ea26867f9094bbea1efa2077e5438b3c Mon Sep 17 00:00:00 2001
From: Florian Loitsch <florian@toit.io>
Date: Thu, 14 Mar 2024 10:08:15 +0100
Subject: [PATCH] Add a way to get all keys of the headers. (#131)

Fixes #120.
---
 src/headers.toit        | 7 +++++++
 tests/headers_test.toit | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/headers.toit b/src/headers.toit
index 5f8d0bf..f15538a 100644
--- a/src/headers.toit
+++ b/src/headers.toit
@@ -23,6 +23,13 @@ class Headers:
 
   constructor.private_ .headers_:
 
+  /**
+  The keys of the header.
+  */
+  keys -> List:
+    if not headers_: return []
+    return headers_.keys
+
   /**
   Returns a single string value for the header or null if the header is not
     present.  If there are multiple values, the last value is returned.
diff --git a/tests/headers_test.toit b/tests/headers_test.toit
index 279902a..afd421f 100644
--- a/tests/headers_test.toit
+++ b/tests/headers_test.toit
@@ -8,6 +8,7 @@ import http
 
 main:
   test_from_map
+  test_keys
 
 /**
 Converts the given $headers to a string.
@@ -35,3 +36,10 @@ test_from_map:
 
   headers = http.Headers.from_map {"foo": ["bar", "baz"], "Foo": "corge"}
   expect_equals "Foo: bar\r\nFoo: baz\r\nFoo: corge\r\n" (stringify headers)
+
+test_keys:
+  headers := http.Headers.from_map {"foo": ["bar", "baz"], "qux": "quux"}
+  expect_list_equals ["Foo", "Qux"] headers.keys
+
+  headers = http.Headers
+  expect_list_equals [] headers.keys