Fix proxy settings types when reading the configurations

src/api/utils.ts

@@ -28,8 +28,8 @@ export async function createHttpAgent(
 ): Promise<ProxyAgent> {
 	const insecure = cfg.get<boolean>("coder.insecure", false);
 	const proxyStrictSSL = cfg.get<boolean>("http.proxyStrictSSL", true);
-	const proxyAuthorization = cfg.get<string>("http.proxyAuthorization");
-	const httpNoProxy = cfg.get<string>("http.noProxy");
+	const proxyAuthorization = cfg.get<string | null>("http.proxyAuthorization");
+	const httpNoProxy = cfg.get<string[]>("http.noProxy");
 
 	const certFile = expandPath(
 		String(cfg.get("coder.tlsCertFile") ?? "").trim(),
@@ -56,7 +56,7 @@ export async function createHttpAgent(
 				url,
 				cfg.get("http.proxy"),
 				cfg.get("coder.proxyBypass"),
-				httpNoProxy,
+				httpNoProxy?.map((noProxy) => noProxy.trim())?.join(","),
 			);
 		},
 		headers,

test/unit/api/utils.test.ts

@@ -201,7 +201,7 @@ describe("createHttpAgent", () => {
 		it("uses http.noProxy as fallback when coder.proxyBypass is not set", async () => {
 			const cfg = new MockConfigurationProvider();
 			cfg.set("http.proxy", proxy);
-			cfg.set("http.noProxy", "internal.example.com");
+			cfg.set("http.noProxy", ["internal.example.com"]);
 
 			const agent = await createHttpAgent(cfg);
 
@@ -214,7 +214,7 @@ describe("createHttpAgent", () => {
 			const cfg = new MockConfigurationProvider();
 			cfg.set("http.proxy", proxy);
 			cfg.set("coder.proxyBypass", "primary.example.com");
-			cfg.set("http.noProxy", "fallback.example.com");
+			cfg.set("http.noProxy", ["fallback.example.com"]);
 
 			const agent = await createHttpAgent(cfg);
 
@@ -225,5 +225,42 @@ describe("createHttpAgent", () => {
 				await agent.getProxyForUrl("https://fallback.example.com", mockRequest),
 			).toBe(proxy);
 		});
+
+		it("trims and joins multiple http.noProxy entries", async () => {
+			const cfg = new MockConfigurationProvider();
+			cfg.set("http.proxy", proxy);
+			cfg.set("http.noProxy", [" first.example.com ", "second.example.com "]);
+
+			const agent = await createHttpAgent(cfg);
+
+			expect(
+				await agent.getProxyForUrl("https://first.example.com", mockRequest),
+			).toBe("");
+			expect(
+				await agent.getProxyForUrl("https://second.example.com", mockRequest),
+			).toBe("");
+			expect(
+				await agent.getProxyForUrl("https://other.example.com", mockRequest),
+			).toBe(proxy);
+		});
+
+		interface NoProxyTestCase {
+			name: string;
+			noProxy: string[] | undefined;
+		}
+		it.each<NoProxyTestCase>([
+			{ name: "undefined", noProxy: undefined },
+			{ name: "empty array", noProxy: [] },
+		])("uses proxy when http.noProxy is $name", async ({ noProxy }) => {
+			const cfg = new MockConfigurationProvider();
+			cfg.set("http.proxy", proxy);
+			cfg.set("http.noProxy", noProxy);
+
+			const agent = await createHttpAgent(cfg);
+
+			expect(
+				await agent.getProxyForUrl("https://example.com", mockRequest),
+			).toBe(proxy);
+		});
 	});
 });