test: add HTTP_PROXY tests (#2977)

cli/flags.rs

@@ -62,7 +62,9 @@ pub struct DenoFlags {
 
 static ENV_VARIABLES_HELP: &str = "ENVIRONMENT VARIABLES:
     DENO_DIR        Set deno's base directory
-    NO_COLOR        Set to disable color";
+    NO_COLOR        Set to disable color
+    HTTP_PROXY      Set proxy address for HTTP requests (module downloads, fetch)
+    HTTPS_PROXY     Set proxy address for HTTPS requests (module downloads, fetch)";
 
 fn add_run_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
   app

cli/tests/045_proxy_client.ts

+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+async function main(): Promise<void> {
+  const res = await fetch("http://deno.land/welcome.ts");
+  console.log(`Response http: ${await res.text()}`);
+}
+
+main();

cli/tests/045_proxy_test.ts

+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import {
+  serve,
+  ServerRequest
+} from "../../js/deps/https/deno.land/std/http/server.ts";
+import { assertEquals } from "../../js/deps/https/deno.land/std/testing/asserts.ts";
+
+const addr = Deno.args[1] || "127.0.0.1:4555";
+
+async function proxyServer(): Promise<void> {
+  const server = serve(addr);
+
+  console.log(`Proxy server listening on http://${addr}/`);
+  for await (const req of server) {
+    proxyRequest(req);
+  }
+}
+
+async function proxyRequest(req: ServerRequest): Promise<void> {
+  console.log(`Proxy request to: ${req.url}`);
+  const resp = await fetch(req.url, {
+    method: req.method,
+    headers: req.headers
+  });
+  req.respond(resp);
+}
+
+async function testFetch(): Promise<void> {
+  const c = Deno.run({
+    args: [
+      Deno.execPath(),
+      "--no-prompt",
+      "--reload",
+      "--allow-net",
+      "045_proxy_client.ts"
+    ],
+    stdout: "piped",
+    env: {
+      HTTP_PROXY: `http://${addr}`
+    }
+  });
+
+  const status = await c.status();
+  assertEquals(status.code, 0);
+  c.close();
+}
+
+async function testModuleDownload(): Promise<void> {
+  const http = Deno.run({
+    args: [
+      Deno.execPath(),
+      "--no-prompt",
+      "--reload",
+      "fetch",
+      "http://deno.land/welcome.ts"
+    ],
+    stdout: "piped",
+    env: {
+      HTTP_PROXY: `http://${addr}`
+    }
+  });
+
+  const httpStatus = await http.status();
+  assertEquals(httpStatus.code, 0);
+  http.close();
+}
+
+async function main(): Promise<void> {
+  proxyServer();
+  await testFetch();
+  await testModuleDownload();
+  Deno.exit(0);
+}
+
+main();

cli/tests/045_proxy_test.ts.out

+Proxy server listening on [WILDCARD]
+Proxy request to: http://deno.land/welcome.ts
+Proxy request to: http://deno.land/welcome.ts

cli/tests/integration_tests.rs

@@ -317,6 +317,11 @@ itest!(_044_bad_resource {
   exit_code: 1,
 });
 
+itest!(_045_proxy {
+  args: "run --allow-net --allow-env --allow-run --reload 045_proxy_test.ts",
+  output: "045_proxy_test.ts.out",
+});
+
 itest!(async_error {
   exit_code: 1,
   args: "run --reload async_error.ts",

website/manual.md

@@ -712,6 +712,8 @@ SUBCOMMANDS:
 ENVIRONMENT VARIABLES:
     DENO_DIR        Set deno's base directory
     NO_COLOR        Set to disable color
+    HTTP_PROXY      Set proxy address for HTTP requests (module downloads, fetch)
+    HTTPS_PROXY     Set proxy address for HTTPS requests (module downloads, fetch)
 ```
 
 ### Environmental variables
@@ -876,12 +878,12 @@ $ deno install awesome_cli https://example.com/awesome/cli.ts
 
 ## Proxies
 
-Deno supports proxies.
+Deno supports proxies for module downloads and `fetch` API.
 
-`HTTP_PROXY` and `HTTPS_PROXY` environmental variables are used to configure
-them.
+Proxy configuration is read from environmental variables: `HTTP_PROXY` and
+`HTTPS_PROXY`.
 
-For Windows if environmental variables are not found Deno will fall back to
+In case of Windows if environmental variables are not found Deno falls back to
 reading proxies from registry.
 
 ## Import maps