django 请求处理流程 链路追踪

class BaseMiddleware:

# https://github.com/django/django/blob/master/tests/utils_tests/test_decorators.py

def __init__(self, get_response):

self.get_response = get_response

def __call__(self, request):

return self.get_response(request)

在请求响应头中加入request_id

class StraceRequestMiddleware(BaseMiddleware):

def __call__(self, request):

response = self.get_response(request)

# 'WSGIRequest' object has no attribute 'process_view_RequestId'

# TODO

try:

response['X-REQUEST-ID'] = request.process_view_RequestId

except:

pass

return response

def process_view(self, request, view_func, view_args, view_kwargs):

if not hasattr(request, 'process_view_RequestId'):

setattr(request, 'process_view_RequestId', createRequestId())