<Vishal> Added tracing id in request.

README.md

@@ -1,5 +1,5 @@
 # DRF API Logger
-![version](https://img.shields.io/badge/version-1.1.12-blue.svg)
+![version](https://img.shields.io/badge/version-1.1.13-blue.svg)
 [![Downloads](https://static.pepy.tech/personalized-badge/drf-api-logger?period=total&units=none&left_color=black&right_color=orange&left_text=Downloads%20Total)](http://pepy.tech/project/drf-api-logger)
 [![Downloads](https://static.pepy.tech/personalized-badge/drf-api-logger?period=month&units=none&left_color=black&right_color=orange&left_text=Downloads%20Last%20Month)](https://pepy.tech/project/drf-api-logger)
 [![Downloads](https://static.pepy.tech/personalized-badge/drf-api-logger?period=week&units=none&left_color=black&right_color=orange&left_text=Downloads%20Last%20Week)](https://pepy.tech/project/drf-api-logger)
@@ -215,6 +215,28 @@ DRF_API_LOGGER_PATH_TYPE = 'ABSOLUTE'  # Default to ABSOLUTE if not specified
 # Possible values are ABSOLUTE, FULL_PATH or RAW_URI
 ```
 
+### Tracing
+You can enable tracing by specifying `DRF_API_LOGGER_ENABLE_TRACING` in settings.py.
+This will add a tracing id (UUID.uuid4()) in the signals of DRF API Logger (if enabled).
+
+In views, you can use request.tracing_id to get the tracing id.
+```python
+DRF_API_LOGGER_ENABLE_TRACING = True  # default to False
+```
+
+### Want to generate your own tracing uuid?
+By default, DRF API Logger usage uuid.uuid4() to generate tracing id.
+If you want to use your custom function to generate uuid, specify DRF_API_LOGGER_TRACING_FUNC in setting.py file.
+```python
+DRF_API_LOGGER_TRACING_FUNC = 'foo.bar.func_name'
+```
+
+### Tracing already present in headers?
+If the tracing id is already coming as a part of request headers, you can specify the header name.
+```python
+DRF_API_LOGGER_TRACING_ID_HEADER_NAME: str = 'X_TRACING_ID'  # Replace with actual header name.
+```
+
 Considering we are accessing the following URL: http://127.0.0.1:8000/api/v1/?page=123
 DRF_API_LOGGER_PATH_TYPE possible values are:
 1. ABSOLUTE (Default) :   

drf_api_logger/middleware/api_logger_middleware.py

@@ -1,6 +1,8 @@
+import importlib
 import json
 import time
-import re
+import uuid
+
 from django.conf import settings
 from django.urls import resolve
 from django.utils import timezone
@@ -57,6 +59,19 @@ def __init__(self, get_response):
                     settings.DRF_API_LOGGER_STATUS_CODES) is list:
                 self.DRF_API_LOGGER_STATUS_CODES = settings.DRF_API_LOGGER_STATUS_CODES
 
+        self.DRF_API_LOGGER_ENABLE_TRACING = False
+        self.DRF_API_LOGGER_TRACING_ID_HEADER_NAME = None
+        if hasattr(settings, 'DRF_API_LOGGER_ENABLE_TRACING'):
+            self.DRF_API_LOGGER_ENABLE_TRACING = settings.DRF_API_LOGGER_ENABLE_TRACING
+            if self.DRF_API_LOGGER_ENABLE_TRACING and hasattr(settings, 'DRF_API_LOGGER_TRACING_ID_HEADER_NAME'):
+                self.DRF_API_LOGGER_TRACING_ID_HEADER_NAME = settings.DRF_API_LOGGER_TRACING_ID_HEADER_NAME
+
+        self.tracing_func_name = None
+        if hasattr(settings, 'DRF_API_LOGGER_TRACING_FUNC'):
+            mod_name, func_name = settings.DRF_API_LOGGER_TRACING_FUNC.rsplit('.', 1)
+            mod = importlib.import_module(mod_name)
+            self.tracing_func_name = getattr(mod, func_name)
+
     def __call__(self, request):
 
         # Run only if logger is enabled.
@@ -77,13 +92,31 @@ def __call__(self, request):
             if namespace in self.DRF_API_LOGGER_SKIP_NAMESPACE:
                 return self.get_response(request)
 
+            # Code to be executed for each request/response after
+            # the view is called.
+
             start_time = time.time()
+
+            headers = get_headers(request=request)
+            method = request.method
+
             request_data = ''
             try:
                 request_data = json.loads(request.body) if request.body else ''
             except:
                 pass
 
+            tracing_id = None
+            if self.DRF_API_LOGGER_ENABLE_TRACING:
+                if self.DRF_API_LOGGER_TRACING_ID_HEADER_NAME:
+                    tracing_id = headers.get(self.DRF_API_LOGGER_TRACING_ID_HEADER_NAME)
+                else:
+                    if self.tracing_func_name:
+                        tracing_id = self.tracing_func_name()
+                    else:
+                        tracing_id = str(uuid.uuid4())
+                    request.tracing_id = tracing_id
+
             # Code to be executed for each request before
             # the view (and later middleware) are called.
             response = self.get_response(request)
@@ -92,18 +125,13 @@ def __call__(self, request):
             if self.DRF_API_LOGGER_STATUS_CODES and response.status_code not in self.DRF_API_LOGGER_STATUS_CODES:
                 return response
 
-            # Code to be executed for each request/response after
-            # the view is called.
-
-            headers = get_headers(request=request)
-            method = request.method
-
             # Log only registered methods if available.
             if len(self.DRF_API_LOGGER_METHODS) > 0 and method not in self.DRF_API_LOGGER_METHODS:
                 return response
 
-            if response.get('content-type') in ('application/json', 'application/vnd.api+json', 'application/gzip', 'application/octet-stream'):
-
+            if response.get('content-type') in (
+                    'application/json', 'application/vnd.api+json', 'application/gzip', 'application/octet-stream'):
+
                 if response.get('content-type') == 'application/gzip':
                     response_body = '** GZIP Archive **'
                 elif response.get('content-type') == 'application/octet-stream':
@@ -144,6 +172,10 @@ def __call__(self, request):
                         d['response'] = json.dumps(d['response'], indent=4, ensure_ascii=False)
                         LOGGER_THREAD.put_log_data(data=d)
                 if self.DRF_API_LOGGER_SIGNAL:
+                    if tracing_id:
+                        data.update({
+                            'tracing_id': tracing_id
+                        })
                     API_LOGGER_SIGNAL.listen(**data)
             else:
                 return response

setup.py

@@ -21,7 +21,7 @@ def get_long_desc():
 
 setuptools.setup(
     name="drf_api_logger",
-    version="1.1.12",
+    version="1.1.13",
     author="Vishal Anand",
     author_email="vishalanandl177@gmail.com",
     description="An API Logger for your Django Rest Framework project.",