fix(openai): proxy websocket connections under bun (#29832)

packages/opencode/src/plugin/openai/ws.ts

@@ -4,6 +4,7 @@
 import WebSocket from "ws"
 import { ProviderError } from "@/provider/error"
 import { errorMessage } from "@/util/error"
+import { ProxyEnv } from "@/util/proxy-env"
 
 export const PROTOCOL_HEADER = "responses_websockets=2026-02-06"
 
@@ -72,7 +73,13 @@ export function connectResponsesWebSocket(options: ConnectResponsesWebSocketOpti
     }
     delete headers["content-length"]
 
-    const socket = new WebSocket(options.url, { headers })
+    // Bun does not apply HTTP(S)_PROXY to WebSockets unless the proxy is supplied explicitly.
+    const proxy =
+      typeof Bun === "undefined"
+        ? undefined
+        : ProxyEnv.getProxyForUrl(options.url.replace(/^wss:/, "https:").replace(/^ws:/, "http:"))
+    const connect = { headers, ...(proxy ? { proxy } : {}) }
+    const socket = new WebSocket(options.url, connect)
     const timeout = options.timeout
       ? setTimeout(() => {
           cleanup()

packages/opencode/src/util/proxy-env.ts

@@ -0,0 +1,72 @@
+/*
+ * Adapted from proxy-from-env: https://github.com/Rob--W/proxy-from-env
+ *
+ * The MIT License
+ *
+ * Copyright (C) 2016-2018 Rob Wu <rob@robwu.nl>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+const DEFAULT_PORTS: Record<string, number> = {
+  ftp: 21,
+  gopher: 70,
+  http: 80,
+  https: 443,
+  ws: 80,
+  wss: 443,
+}
+
+export function getProxyForUrl(input: string | URL) {
+  const url = typeof input === "string" ? (URL.canParse(input) ? new URL(input) : undefined) : input
+  if (!url) return
+
+  const protocol = url.protocol.split(":", 1)[0]
+  const hostname = url.host.replace(/:\d*$/, "")
+  const port = Number.parseInt(url.port) || DEFAULT_PORTS[protocol] || 0
+  if (!shouldProxy(hostname, port)) return
+
+  const proxy = env(`${protocol}_proxy`) || env("all_proxy")
+  if (!proxy) return
+  return proxy.includes("://") ? proxy : `${protocol}://${proxy}`
+}
+
+function shouldProxy(hostname: string, port: number) {
+  const noProxy = env("no_proxy").toLowerCase()
+  if (!noProxy) return true
+  if (noProxy === "*") return false
+
+  return noProxy.split(/[,\s]/).every((proxy) => {
+    if (!proxy) return true
+
+    const parsed = proxy.match(/^(.+):(\d+)$/)
+    const proxyHostname = parsed ? parsed[1] : proxy
+    const proxyPort = parsed ? Number.parseInt(parsed[2]) : 0
+    if (proxyPort && proxyPort !== port) return true
+
+    if (!/^[.*]/.test(proxyHostname)) return hostname !== proxyHostname
+    return !hostname.endsWith(proxyHostname.startsWith("*") ? proxyHostname.slice(1) : proxyHostname)
+  })
+}
+
+function env(key: string) {
+  return process.env[key.toLowerCase()] || process.env[key.toUpperCase()] || ""
+}
+
+export * as ProxyEnv from "./proxy-env"