发送及接收信息和事件是代理与用户间沟通的核心环节。代理通过 Business Messages API 向用户发送信息、事件和请求，但通过网络钩子以 JSON 格式接收用户创建的信息和事件。
下面是一个对话流程示例，它使用示例数据来说明信息、事件和请求如何形成有用且有意义的互动。
在此示例中，用户发起对话并发送“Hello, I'm World!”信息，然后代理回复“Hello, World”。
- 用户发起与代理的对话。
用户开始输入回复后，会向代理发送输入事件。
{ "agent": "brands/1111/agents/2222", "conversationId": "3333", "customAgentId": "hello-world-bot", "requestId": "1234567890", "userStatus": { "isTyping": "true", "createTime": "2020-10-02T15:01:23.045123456Z", }, "sendTime": "2020-10-02T15:01:24.045123456Z", }用户发送“Hello, I'm World!”信息。
{ "agent": "brands/1111/agents/2222", "conversationId": "3333", "customAgentId": "hello-world-bot", "requestId": "123123123", "message": { "messageId": "4444", "name": "conversations/12345/messages/67890", "text": "Hello! I'm World!", "createTime": "2020-10-02T15:05:23.045123456Z", }, "context": { "entryPoint": "PLACESHEET", "userInfo": { "displayName": "Michael", "userDeviceLocale": "en", }, "resolvedLocale": "en", } "sendTime": "2020-10-02T15:05:24.045123456Z", }代理发送“Hello, World”信息。
curl -X POST "https://businessmessages.googleapis.com/v1/conversations/3333/messages" \ -H "Content-Type: application/json" \ -H "`oauth2l header --json path/to/service/account/key.json businessmessages`" \ -d "{ 'messageId': '5555', 'text': 'Hello, World', 'representative': { 'avatarImage': 'https://hello.world/avatar.jpg', 'displayName': 'Hello World Agent', 'representativeType': 'BOT' } }"信息送达后，用户的设备会返回递送回执。
{ "agent": "brands/1111/agents/2222", "conversationId": "3333", "customAgentId": "hello-world-bot", "receipts" : { "receipts": [ { "message": "conversations/3333/messages/5555", "receiptType": "DELIVERED", } ], "createTime": "2020-10-02T16:01:23.045123456Z", }, "sendTime": "2020-10-02T16:01:24.045123456Z", }