init: add source code from src.zip

src/cli/transports/transportUtils.ts

@@ -0,0 +1,45 @@
+import { URL } from 'url'
+import { isEnvTruthy } from '../../utils/envUtils.js'
+import { HybridTransport } from './HybridTransport.js'
+import { SSETransport } from './SSETransport.js'
+import type { Transport } from './Transport.js'
+import { WebSocketTransport } from './WebSocketTransport.js'
+
+/**
+ * Helper function to get the appropriate transport for a URL.
+ *
+ * Transport selection priority:
+ * 1. SSETransport (SSE reads + POST writes) when CLAUDE_CODE_USE_CCR_V2 is set
+ * 2. HybridTransport (WS reads + POST writes) when CLAUDE_CODE_POST_FOR_SESSION_INGRESS_V2 is set
+ * 3. WebSocketTransport (WS reads + WS writes) — default
+ */
+export function getTransportForUrl(
+  url: URL,
+  headers: Record<string, string> = {},
+  sessionId?: string,
+  refreshHeaders?: () => Record<string, string>,
+): Transport {
+  if (isEnvTruthy(process.env.CLAUDE_CODE_USE_CCR_V2)) {
+    // v2: SSE for reads, HTTP POST for writes
+    // --sdk-url is the session URL (.../sessions/{id});
+    // derive the SSE stream URL by appending /worker/events/stream
+    const sseUrl = new URL(url.href)
+    if (sseUrl.protocol === 'wss:') {
+      sseUrl.protocol = 'https:'
+    } else if (sseUrl.protocol === 'ws:') {
+      sseUrl.protocol = 'http:'
+    }
+    sseUrl.pathname =
+      sseUrl.pathname.replace(/\/$/, '') + '/worker/events/stream'
+    return new SSETransport(sseUrl, headers, sessionId, refreshHeaders)
+  }
+
+  if (url.protocol === 'ws:' || url.protocol === 'wss:') {
+    if (isEnvTruthy(process.env.CLAUDE_CODE_POST_FOR_SESSION_INGRESS_V2)) {
+      return new HybridTransport(url, headers, sessionId, refreshHeaders)
+    }
+    return new WebSocketTransport(url, headers, sessionId, refreshHeaders)
+  } else {
+    throw new Error(`Unsupported protocol: ${url.protocol}`)
+  }
+}