fix: fix for host parsing

containers/l7.go

@@ -1,6 +1,7 @@
 package containers
 
 import (
+	"log"
 	"time"
 
 	"github.com/coroot/coroot-node-agent/common"
@@ -73,8 +74,10 @@ func (s L7Stats) get(protocol l7.Protocol, destination, actualDestination netadd
 			constLabels["method"] = method
 			if dstWorkload.Namespace == "external" {
 				host, err := l7.ParseHostFromHttpRequest(string(r.Payload))
-				if err == nil {
+				if host != "" {
 					constLabels["destination_workload_name"] = host
+				} else {
+					log.Printf("Failed to parse host %s , %q", host, err)
 				}
 			}
 			hOpts := L7Latency[protocol]

ebpftracer/l7/http.go

@@ -3,7 +3,6 @@ package l7
 import (
 	"bytes"
 	"encoding/base64"
-	"errors"
 	"log"
 	"regexp"
 	"strings"
@@ -50,28 +49,26 @@ func ParseHttpAndRest(payload []byte) (string, string, string, string) {
 	return string(method), string(uri), string(headers), string(d)
 }
 
-func ParseHostFromHttpRequest(request string) (string, error) {
-	// Split the request string into lines
-	lines := strings.Split(request, "\n")
+func ParseHostFromHttpRequest(input string) (string, error) {
+	// Split the input string by newline characters
+	lines := strings.Split(input, "\r\n")
 
-	// Search for the Host header within the lines
+	// Initialize host variable
 	var host string
+
+	// Iterate through each line
 	for _, line := range lines {
+		// Check if the line starts with "Host:"
 		if strings.HasPrefix(line, "Host:") {
-			parts := strings.SplitN(line, ": ", 2)
+			// Split the line by colon and trim the leading/trailing whitespace
+			parts := strings.Split(line, ":")
 			if len(parts) == 2 {
-				host = parts[1]
-				break
+				host = strings.TrimSpace(parts[1])
 			}
+			break
 		}
 	}
 
-	// Check if the Host header is found
-	if host == "" {
-		err := errors.New("host header not found")
-		return "", err
-	}
-
 	return host, nil
 }