perf(backend): 使用 gjson/sjson 优化热路径 JSON 处理
将 API 网关热路径中的 json.Unmarshal+json.Marshal 替换为 gjson 零拷贝查询和 sjson 精准写入: - unwrapV1InternalResponse 性能提升 22x(4009ns→182ns),内存分配减少 28.5x - unwrapGeminiResponse、extractGeminiUsage、estimateGeminiCountTokens、ParseGeminiRateLimitResetTime 改为接收 []byte 使用 gjson 提取 - ParseGatewayRequest 的 model/stream/metadata/thinking/max_tokens 改用 gjson 类型安全提取 - Handler 层(sora/openai)改用 gjson 提取字段、sjson 注入/修改字段,移除 map[string]any 中间变量 - Sora Client 响应解析改用 gjson ForEach 遍历,减少内存分配 - 新增约 100 个单元测试用例,所有改动函数覆盖率 >85% Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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@@ -19,6 +19,8 @@ import (
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"github.com/Wei-Shaw/sub2api/internal/testutil"
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"github.com/gin-gonic/gin"
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"github.com/stretchr/testify/require"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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)
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// 编译期接口断言
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@@ -414,3 +416,65 @@ func TestSoraGatewayHandler_ChatCompletions(t *testing.T) {
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require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
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require.NotEmpty(t, resp["media_url"])
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}
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// TestSoraHandler_StreamForcing 验证 sora handler 的 stream 强制逻辑
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func TestSoraHandler_StreamForcing(t *testing.T) {
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// 测试 1:stream=false 时 sjson 强制修改为 true
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body := []byte(`{"model":"sora","messages":[{"role":"user","content":"test"}],"stream":false}`)
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clientStream := gjson.GetBytes(body, "stream").Bool()
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require.False(t, clientStream)
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newBody, err := sjson.SetBytes(body, "stream", true)
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require.NoError(t, err)
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require.True(t, gjson.GetBytes(newBody, "stream").Bool())
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// 测试 2:stream=true 时不修改
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body2 := []byte(`{"model":"sora","messages":[{"role":"user","content":"test"}],"stream":true}`)
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require.True(t, gjson.GetBytes(body2, "stream").Bool())
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// 测试 3:无 stream 字段时 gjson 返回 false(零值)
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body3 := []byte(`{"model":"sora","messages":[{"role":"user","content":"test"}]}`)
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require.False(t, gjson.GetBytes(body3, "stream").Bool())
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}
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// TestSoraHandler_ValidationExtraction 验证 sora handler 中 gjson 字段校验逻辑
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func TestSoraHandler_ValidationExtraction(t *testing.T) {
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// model 缺失
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body := []byte(`{"messages":[{"role":"user","content":"test"}]}`)
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model := gjson.GetBytes(body, "model").String()
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require.Empty(t, model)
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// messages 缺失
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body2 := []byte(`{"model":"sora"}`)
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require.False(t, gjson.GetBytes(body2, "messages").Exists())
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// messages 不是 JSON 数组
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body3 := []byte(`{"model":"sora","messages":"not array"}`)
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msgResult := gjson.GetBytes(body3, "messages")
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require.True(t, msgResult.Exists())
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require.NotEqual(t, gjson.JSON, msgResult.Type) // string 类型,不是 JSON 数组
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}
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// TestGenerateOpenAISessionHash_WithBody 验证 generateOpenAISessionHash 的 body/header 解析逻辑
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func TestGenerateOpenAISessionHash_WithBody(t *testing.T) {
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gin.SetMode(gin.TestMode)
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// 从 body 提取 prompt_cache_key
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body := []byte(`{"model":"sora","prompt_cache_key":"session-abc"}`)
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w := httptest.NewRecorder()
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c, _ := gin.CreateTestContext(w)
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c.Request = httptest.NewRequest("POST", "/", nil)
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hash := generateOpenAISessionHash(c, body)
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require.NotEmpty(t, hash)
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// 无 prompt_cache_key 且无 header → 空 hash
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body2 := []byte(`{"model":"sora"}`)
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hash2 := generateOpenAISessionHash(c, body2)
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require.Empty(t, hash2)
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// header 优先于 body
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c.Request.Header.Set("session_id", "from-header")
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hash3 := generateOpenAISessionHash(c, body)
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require.NotEmpty(t, hash3)
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require.NotEqual(t, hash, hash3) // 不同来源应产生不同 hash
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}
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