修复全量审查问题;设置接口PATCH化;回传指纹加固

internal/oci/genai_responses_test.go

@@ -1,6 +1,7 @@
 package oci
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"io"
@@ -139,3 +140,31 @@ func TestCallWithHeaderBudget(t *testing.T) {
 		}
 	})
 }
+
+// TestReadCompatBodyRejectsOversize 锁定上游响应上限:恰好达限通过,超限报错,
+// 不允许静默截断配 200 让下游当完整成功。
+func TestReadCompatBodyRejectsOversize(t *testing.T) {
+	cases := []struct {
+		name    string
+		size    int64
+		wantErr bool
+	}{
+		{"under limit", 15, false},
+		{"exactly limit", 16, false},
+		{"over limit", 17, true},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			payload, err := readCompatBody(bytes.NewReader(make([]byte, tc.size)), 16, "test")
+			if tc.wantErr {
+				if err == nil || !strings.Contains(err.Error(), "exceeds") {
+					t.Fatalf("err = %v, want 超限错误", err)
+				}
+				return
+			}
+			if err != nil || int64(len(payload)) != tc.size {
+				t.Fatalf("payload = %d bytes, %v; want %d", len(payload), err, tc.size)
+			}
+		})
+	}
+}