From eef1416de3a21486a1d3b0ce091aba97f9c1b549 Mon Sep 17 00:00:00 2001
From: Evgeny <113383200+KlassnayaAfrodita@users.noreply.github.com>
Date: Wed, 23 Oct 2024 01:05:52 +0300
Subject: [PATCH] Create profiling.go

this middleware can be useful when analyzing errors, it collects information about which request took how long (time, method, path, IP). I wrote middleweir in your style, so there is an empty structure there
---
 internal/core/middleware/profiling.go | 41 +++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 internal/core/middleware/profiling.go

diff --git a/internal/core/middleware/profiling.go b/internal/core/middleware/profiling.go
new file mode 100644
index 0000000..da98ab1
--- /dev/null
+++ b/internal/core/middleware/profiling.go
@@ -0,0 +1,41 @@
+package middleware
+
+import (
+	"log"
+	"net/http"
+	"time"
+)
+
+// ProfilingMiddleware represents a structure for profiling requests
+type ProfilingMiddleware struct {
+}
+
+// NewProfilingMiddleware creates a new instance of ProfilingMiddleware
+func NewProfilingMiddleware() *ProfilingMiddleware {
+	return &ProfilingMiddleware{}
+}
+
+// Handle processes the requests and measures their execution time
+func (pm *ProfilingMiddleware) Handle(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now() // Record the start time of the request
+
+		// Pass the request to the next handler in the middleware chain
+		next.ServeHTTP(w, r)
+
+		// After the request is completed, measure the execution time
+		duration := time.Since(start)
+
+		// Log information about the request and its execution time
+		log.Printf("Request: %s %s | Time: %v | From IP: %s", r.Method, r.URL.Path, duration, getClientIP(r))
+	})
+}
+
+// getClientIP extracts the client's IP address from the request
+func getClientIP(r *http.Request) string {
+	ip, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		return r.RemoteAddr
+	}
+	return ip
+}