fix: types.RequestResponse url field UnmarshalJSON bug

pkg/input/types/http.go

@@ -123,11 +123,15 @@ func (rr *RequestResponse) UnmarshalJSON(data []byte) error {
 	if err := json.Unmarshal(data, &m); err != nil {
 		return err
 	}
-	urlStr, ok := m["url"]
+	urlStrRaw, ok := m["url"]
 	if !ok {
 		return fmt.Errorf("missing url in request response")
 	}
-	parsed, err := urlutil.ParseAbsoluteURL(string(urlStr), false)
+	var urlStr string
+	if err := json.Unmarshal(urlStrRaw, &urlStr); err != nil {
+		return err
+	}
+	parsed, err := urlutil.ParseAbsoluteURL(urlStr, false)
 	if err != nil {
 		return err
 	}

pkg/input/types/http_test.go

@@ -1,6 +1,7 @@
 package types
 
 import (
+	"encoding/json"
 	"io"
 	"net/http"
 	"net/http/httputil"
@@ -65,3 +66,23 @@ func TestParseHttpRequest(t *testing.T) {
 		})
 	}
 }
+
+func TestUnmarshalJSON(t *testing.T) {
+	tests := []struct {
+		name       string
+		rawJSONStr string
+	}{
+		{"basic url", `{"url": "example.com"}`},
+		{"basic url with scheme", `{"url": "http://example.com"}`},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			var rr RequestResponse
+			err := json.Unmarshal([]byte(tc.rawJSONStr), &rr)
+			if err != nil {
+				t.Fatal(err)
+			}
+			t.Logf("url: %+v", rr.URL)
+		})
+	}
+}