You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
# -*- coding: utf-8 -*-
"""
@author: peng
@file: span.py
@time: 2025/1/17 16:57
"""
from contextlib import asynccontextmanager
from starlette . types import Scope , Message
from . ctx import TraceCtx
class Span :
"""
整个http生命周期：
request(before) --> request(after) --> response(before) --> response(after)
"""
def __init__ ( self , scope : Scope ) :
self . scope = scope
async def request_before ( self ) :
"""
request_before: 处理header信息等, 如记录请求体信息
"""
TraceCtx . set_id ( )
async def request_after ( self , message : Message ) :
"""
request_after: 处理请求bytes，
example:
message: { ' type ' : ' http.request ' , ' body ' : b ' { \r \n " name " : " \xe8 \x8b \x8f \xe8 \x8b \x8f \xe8 \x8b \x8f " \r \n } ' , ' more_body ' : False}
"""
return message
async def response ( self , message : Message ) :
"""
if message[ ' type ' ] == " http.response.start " : -----> request-before
pass
if message[ ' type ' ] == " http.response.body " : -----> request-after
message.get( ' body ' , b ' ' )
pass
"""
if message [ ' type ' ] == ' http.response.start ' :
message [ ' headers ' ] . append ( ( b ' request-id ' , TraceCtx . get_id ( ) . encode ( ) ) )
return message
@asynccontextmanager
async def get_current_span ( scope : Scope ) :
yield Span ( scope )