Middleware for Django framework

Author: pglombardo

instana/middleware.py

@@ -0,0 +1,24 @@
+import opentracing
+import instana.tracer
+import opentracing.ext.tags as ext
+
+
+class InstanaMiddleware(object):
+    def __init__(self, get_response):
+        self.get_response = get_response
+        opentracing.global_tracer = instana.tracer.InstanaTracer()
+        self
+
+    def __call__(self, request):
+        span = opentracing.global_tracer.start_span("django")
+
+        span.set_tag(ext.HTTP_URL, request.environ['PATH_INFO'])
+        span.set_tag("http.params", request.environ['QUERY_STRING'])
+        span.set_tag(ext.HTTP_METHOD, request.method)
+        span.set_tag("http.host", request.environ['HTTP_HOST'])
+
+        response = self.get_response(request)
+
+        span.set_tag(ext.HTTP_STATUS_CODE, response.status_code)
+        span.finish()
+        return response