feat(core): basic implementation of remote workspace support (#15120)

packages/opencode/src/control-plane/session-proxy-middleware.ts

@@ -0,0 +1,46 @@
+import { Instance } from "@/project/instance"
+import type { MiddlewareHandler } from "hono"
+import { Installation } from "../installation"
+import { getAdaptor } from "./adaptors"
+import { Workspace } from "./workspace"
+
+// This middleware forwards all non-GET requests if the workspace is a
+// remote. The remote workspace needs to handle session mutations
+async function proxySessionRequest(req: Request) {
+  if (req.method === "GET") return
+  if (!Instance.directory.startsWith("wrk_")) return
+
+  const workspace = await Workspace.get(Instance.directory)
+  if (!workspace) {
+    return new Response(`Workspace not found: ${Instance.directory}`, {
+      status: 500,
+      headers: {
+        "content-type": "text/plain; charset=utf-8",
+      },
+    })
+  }
+  if (workspace.config.type === "worktree") return
+
+  const url = new URL(req.url)
+  const body = req.method === "HEAD" ? undefined : await req.arrayBuffer()
+  return getAdaptor(workspace.config).request(
+    workspace.config,
+    req.method,
+    `${url.pathname}${url.search}`,
+    body,
+    req.signal,
+  )
+}
+
+export const SessionProxyMiddleware: MiddlewareHandler = async (c, next) => {
+  // Only available in development for now
+  if (!Installation.isLocal()) {
+    return next()
+  }
+
+  const response = await proxySessionRequest(c.req.raw)
+  if (response) {
+    return response
+  }
+  return next()
+}