handle structs better

appinsights/handler.go

@@ -2,6 +2,8 @@ package appinsights
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"log/slog"
 	"maps"
 	"net/http"
@@ -219,6 +221,15 @@ func addAttributeToMap(m map[string]string, keyPrefix string, a slog.Attr) {
 	case slog.KindGroup:
 		addAttributeGroupToMap(m, keyPrefix, a)
 		return
+	case slog.KindAny:
+		switch v := a.Value.Any().(type) {
+		case json.RawMessage:
+			value = string(v)
+		case []byte:
+			value = string(v)
+		default:
+			value = fmt.Sprint(v)
+		}
 	default:
 		value = a.Value.String()
 	}

appinsights/handler_public_test.go

@@ -2,6 +2,7 @@ package appinsights_test
 
 import (
 	"context"
+	"encoding/json"
 	"log/slog"
 	"maps"
 	"strings"
@@ -199,6 +200,12 @@ type attrTestCase struct {
 	properties attrMap
 }
 
+type pet struct {
+	Name  string
+	Breed string
+	Age   int
+}
+
 func (c *attrTestCase) args() []any {
 	args := make([]any, 0, len(c.attrs)*2)
 	for _, a := range c.attrs {
@@ -295,6 +302,28 @@ func attrsCases() []attrTestCase {
 			},
 			attrMap{},
 		},
+		{
+			"any struct",
+			[]slog.Attr{
+				slog.Any("pet", pet{
+					Name:  "Mochi",
+					Breed: "Beagle",
+					Age:   7,
+				}),
+			},
+			attrMap{
+				"pet": "{Mochi Beagle 7}",
+			},
+		},
+		{
+			"raw json",
+			[]slog.Attr{
+				slog.Any("usage", json.RawMessage(`{"prompt_tokens":448,"total_tokens":1877}`)),
+			},
+			attrMap{
+				"usage": `{"prompt_tokens":448,"total_tokens":1877}`,
+			},
+		},
 	}
 }