gRPC Streams

gRPC streaming enables real-time, bidirectional communication between clients and servers. Bruno supports all four types of gRPC streaming patterns, allowing you to test and interact with streaming APIs efficiently.

Understanding gRPC Streaming

gRPC streaming allows you to send and receive multiple messages over a single connection, making it ideal for:

• Unary streaming (simple request-response, CRUD operations, authentication)
• Client streaming (batch processing, data collection)
• Server streaming (real-time notifications, live data feeds, progress updates)
• Bidirectional streaming (chat applications, collaborative editing, gaming)

Streaming Workflow

Step 1: Configure Request

1. Open your collection and create a new gRPC request
2. Add your gRPC server URL (e.g., https://grpcb.in/)
3. Select a streaming method from the dropdown

Step 2: Auto-Generate or Add Proto Files

You have two options to add message schema:

Option A: Auto-Generate Messages

• Bruno can auto-generate message templates based on server reflection (Click the Auto Fill 🔄 button)
• This works when your gRPC server has reflection enabled

Option B: Add Proto Files

• Upload your .proto files (request or collection level) for enhanced IntelliSense
• Provides better type safety and method discovery

Step 3: Build Stream Connection

1. Start Stream: Click the send button to establish the bidirectional connection

Step 4: Send Multiple Messages

Once the stream is active:

1. Send Message: Click the Send gRPC Message button to transmit your message (next to Auto Fill button)
2. Add More Messages: Continue sending additional messages using Add Message

Step 5: End Stream and View Timeline

1. End Message Stream: Click the ✓ icon (end stream button) to stop sending messages
2. View Response Timeline: See the complete conversation timeline with timestamps