feat: implement proxy support (#1051)

* feat: implement proxy support


prefer lower-case http proxy env vars

* Create calm-oranges-walk.md

update calm-oranges-walk.md

* chore: bump undici to get bug fix for http_proxy

* fix: default fetch to application/json unless otherwise provided

* Revert "fix: default fetch to application/json unless otherwise provided"

This reverts commit 338759b.

* chore: bump undici

.changeset/calm-oranges-walk.md

@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+feat: add support for using wrangler behind a proxy
+
+Configures the undici library (the library wrangler uses for `fetch`) to send all requests via a proxy selected from the first non-empty environment variable from "https_proxy", "HTTPS_PROXY", "http_proxy" and "HTTP_PROXY".

packages/wrangler/package.json

@@ -97,7 +97,7 @@
     "timeago.js": "^4.0.2",
     "tmp-promise": "^3.0.3",
     "ts-dedent": "^2.2.0",
-    "undici": "^4.15.1",
+    "undici": "^5.3.0",
     "update-check": "^1.5.4",
     "ws": "^8.5.0",
     "yargs": "^17.4.1"

packages/wrangler/src/index.tsx

@@ -11,6 +11,7 @@ import { render } from "ink";
 import React from "react";
 import onExit from "signal-exit";
 import supportsColor from "supports-color";
+import { setGlobalDispatcher, ProxyAgent } from "undici";
 import makeCLI from "yargs";
 import { version as wranglerVersion } from "../package.json";
 import { fetchResult } from "./cfetch";
@@ -78,6 +79,17 @@ const resetColor = "\x1b[0m";
 const fgGreenColor = "\x1b[32m";
 const DEFAULT_LOCAL_PORT = 8787;
 
+const proxy =
+  process.env.https_proxy ||
+  process.env.HTTPS_PROXY ||
+  process.env.http_proxy ||
+  process.env.HTTP_PROXY ||
+  undefined;
+
+if (proxy) {
+  setGlobalDispatcher(new ProxyAgent(proxy));
+}
+
 function getRules(config: Config): Config["rules"] {
   const rules = config.rules ?? config.build?.upload?.rules ?? [];