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

packages/opencode/src/control-plane/sse.ts

@@ -0,0 +1,66 @@
+export async function parseSSE(
+  body: ReadableStream<Uint8Array>,
+  signal: AbortSignal,
+  onEvent: (event: unknown) => void,
+) {
+  const reader = body.getReader()
+  const decoder = new TextDecoder()
+  let buf = ""
+  let last = ""
+  let retry = 1000
+
+  const abort = () => {
+    void reader.cancel().catch(() => undefined)
+  }
+
+  signal.addEventListener("abort", abort)
+
+  try {
+    while (!signal.aborted) {
+      const chunk = await reader.read().catch(() => ({ done: true, value: undefined as Uint8Array | undefined }))
+      if (chunk.done) break
+
+      buf += decoder.decode(chunk.value, { stream: true })
+      buf = buf.replace(/\r\n/g, "\n").replace(/\r/g, "\n")
+
+      const chunks = buf.split("\n\n")
+      buf = chunks.pop() ?? ""
+
+      chunks.forEach((chunk) => {
+        const data: string[] = []
+        chunk.split("\n").forEach((line) => {
+          if (line.startsWith("data:")) {
+            data.push(line.replace(/^data:\s*/, ""))
+            return
+          }
+          if (line.startsWith("id:")) {
+            last = line.replace(/^id:\s*/, "")
+            return
+          }
+          if (line.startsWith("retry:")) {
+            const parsed = Number.parseInt(line.replace(/^retry:\s*/, ""), 10)
+            if (!Number.isNaN(parsed)) retry = parsed
+          }
+        })
+
+        if (!data.length) return
+        const raw = data.join("\n")
+        try {
+          onEvent(JSON.parse(raw))
+        } catch {
+          onEvent({
+            type: "sse.message",
+            properties: {
+              data: raw,
+              id: last || undefined,
+              retry,
+            },
+          })
+        }
+      })
+    }
+  } finally {
+    signal.removeEventListener("abort", abort)
+    reader.releaseLock()
+  }
+}