feat: support sse protocol

README.md

@@ -16,6 +16,7 @@ This repository contains the specifications for each AsyncAPI protocol binding.
 * [NATS binding](./nats)
 * [Pulsar](./pulsar)
 * [Redis binding](./redis)
+* [Server-Sent Events binding](./sse)
 * [SNS binding](./sns)
 * [Solace binding](./solace)
 * [SQS binding](./sqs)

sse/README.md

@@ -0,0 +1,53 @@
+# Server Sent Events Bindings
+
+This document defines how to describe Server Sent Events-specific information on AsyncAPI.
+
+See the [Server-Sent Events protocol specification][protocolSpecification].
+
+Server-Sent Events requires `http` protocol, so the SSE [Message Binding Object](#message) below is appropriate for AsyncAPI Servers with protocol `http` or `https`.
+
+<a name="version"></a>
+
+## Version
+
+Current version is `0.1.0`.
+
+
+<a name="server"></a>
+
+## Server Binding Object
+
+This object MUST NOT contain any properties. Its name is reserved for future use.
+
+
+<a name="channel"></a>
+
+## Channel Binding Object
+
+This object MUST NOT contain any properties. Its name is reserved for future use.
+
+
+<a name="operation"></a>
+
+## Operation Binding Object
+
+This object MUST NOT contain any properties. Its name is reserved for future use.
+
+
+<a name="message"></a>
+
+## Message Binding Object
+
+This object contains information about the message representation in SSE.
+
+##### Fixed Fields
+
+Field Name | Type | Description
+---|:---:|---
+<a name="messageBindingObjectEventType"></a>`event` | string | Server-sent event type, typically `message`, to specify allowed SSE message types. |
+<a name="messageBindingObjectBindingVersion"></a>`bindingVersion` | string | The version of this binding. If omitted, "latest" MUST be assumed.
+
+This object MUST contain only the properties defined above.
+
+
+[protocolSpecification]: https://html.spec.whatwg.org/multipage/server-sent-events.html#server-sent-events