python httpx-sse 处理SSE流式响应数据

SSE接口一次请求会分多次响应体(chunk)返回, 这就可以表现为流式响应.
chatgpt对话窗口几个字几个字蹦出来的效果,就使用的这种协议

python httpx-sse 客户端 demo

import httpx
from httpx_sse import connect_sse
import json


url = "http://127.0.0.1:8080/streamecho"
param = {
    "text": "你好啊~",
    "num": 100,
    "interval": 0.5
}
with httpx.Client() as client:
    with connect_sse(client, "GET", url, params=param) as event_source:
        # 把 iter_sse() 迭代完, 就相当于处理完了一次流式调用
        for sse in event_source.iter_sse():
            # 流式响应中,每次响应体的处理逻辑
            chunk_result = json.loads(sse.data)
            # sse.event 获取 event 类型; sse.data 获取每次返回的数据
            print(sse.event, json.dumps(chunk_result, ensure_ascii=False))
        print()
# message {"part": 0, "text": "你好啊~", "datetime": "2024-09-03 17:53:35.684078"}
# message {"part": 1, "text": "你好啊~", "datetime": "2024-09-03 17:53:36.185339"}
# message {"part": 2, "text": "你好啊~", "datetime": "2024-09-03 17:53:36.686913"}

参考

Server-Sent Events 教程参考: https://www.ruanyifeng.com/blog/2017/05/server-sent_events.html