mirror of
https://gitcode.com/JianFeeeee/HomeAgent.git
synced 2026-09-21 17:38:10 +00:00
404 lines
8.9 KiB
Go
404 lines
8.9 KiB
Go
package lua
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import (
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"embed"
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"sync"
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lua "github.com/yuin/gopher-lua"
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)
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//go:embed adapters/*.lua
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var bundledAdapters embed.FS
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type APIAdapter struct {
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Name string `json:"name"`
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Version string `json:"version"`
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}
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// AdapterCache 预加载容器：启动时编译全部脚本到内存，运行时只读缓存，无文件 I/O
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type AdapterCache struct {
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mu sync.RWMutex
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state *lua.LState
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items map[string]*lua.LTable
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}
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func newAdapterCache() *AdapterCache {
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return &AdapterCache{
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state: lua.NewState(),
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items: make(map[string]*lua.LTable),
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}
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}
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func (c *AdapterCache) setupGlobals() {
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s := c.state
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s.SetGlobal("log", s.NewFunction(func(L *lua.LState) int {
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level := L.ToString(1)
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msg := L.ToString(2)
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fmt.Printf("[lua/%s] %s\n", level, msg)
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return 0
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}))
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jsonTable := s.NewTable()
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s.SetGlobal("json", jsonTable)
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s.SetField(jsonTable, "encode", s.NewFunction(func(L *lua.LState) int {
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val := L.CheckAny(1)
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goVal := luaValueToGo(val)
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b, err := json.Marshal(goVal)
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if err != nil {
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L.Push(lua.LString("null"))
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return 1
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}
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L.Push(lua.LString(string(b)))
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return 1
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}))
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s.SetField(jsonTable, "decode", s.NewFunction(func(L *lua.LState) int {
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str := L.CheckString(1)
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var val interface{}
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if err := json.Unmarshal([]byte(str), &val); err != nil {
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L.Push(lua.LNil)
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return 1
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}
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L.Push(goValueToLua(L, val))
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return 1
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}))
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s.SetGlobal("http_get", s.NewFunction(func(L *lua.LState) int {
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url := L.ToString(1)
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L.Push(lua.LString(fmt.Sprintf(`{"url":%q,"status":200,"body":"mock"}`, url)))
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return 1
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}))
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s.SetGlobal("http_post", s.NewFunction(func(L *lua.LState) int {
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url := L.ToString(1)
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body := L.ToString(2)
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L.Push(lua.LString(fmt.Sprintf(`{"url":%q,"body":%q,"status":200}`, url, body)))
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return 1
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}))
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}
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// Preload 编译单个 Lua 适配器脚本并注入缓存
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func (c *AdapterCache) Preload(path string) error {
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data, err := os.ReadFile(path)
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if err != nil {
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return fmt.Errorf("read adapter: %w", err)
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}
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return c.PreloadSource(filepath.Base(path), string(data))
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}
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// PreloadSource 从源码字符串编译适配器并注入缓存
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func (c *AdapterCache) PreloadSource(name, code string) error {
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c.mu.Lock()
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defer c.mu.Unlock()
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if err := c.state.DoString(code); err != nil {
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return fmt.Errorf("compile adapter: %w", err)
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}
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tbl, ok := c.state.Get(-1).(*lua.LTable)
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c.state.Pop(1)
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if !ok {
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return fmt.Errorf("adapter script must return a table")
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}
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if n := tbl.RawGetString("name"); n != nil && n.String() != "" {
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name = n.String()
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}
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c.items[name] = tbl
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return nil
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}
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// Get 运行时从缓存读取已编译的适配器表（无文件 I/O）
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func (c *AdapterCache) Get(name string) *lua.LTable {
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c.mu.RLock()
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defer c.mu.RUnlock()
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return c.items[name]
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}
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// Remove 从缓存移除适配器
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func (c *AdapterCache) Remove(name string) {
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c.mu.Lock()
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defer c.mu.Unlock()
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delete(c.items, name)
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}
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// List 返回缓存中所有适配器摘要
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func (c *AdapterCache) List() []APIAdapter {
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c.mu.RLock()
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defer c.mu.RUnlock()
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list := make([]APIAdapter, 0, len(c.items))
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for name, tbl := range c.items {
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a := APIAdapter{Name: name}
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if v := tbl.RawGetString("version"); v != nil {
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a.Version = v.String()
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}
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list = append(list, a)
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}
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return list
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}
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// Close 释放 Lua 状态
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func (c *AdapterCache) Close() {
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c.mu.Lock()
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defer c.mu.Unlock()
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if c.state != nil {
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c.state.Close()
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c.state = nil
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}
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c.items = nil
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}
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// VM 运行时虚拟机，封装 AdapterCache 提供适配器调用
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type VM struct {
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mu sync.Mutex
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cache *AdapterCache
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adapterDir string
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}
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func NewVM(adapterDir string) *VM {
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return &VM{
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adapterDir: adapterDir,
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cache: newAdapterCache(),
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}
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}
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func (v *VM) AdapterDir() string { return v.adapterDir }
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func (v *VM) Cache() *AdapterCache { return v.cache }
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func (v *VM) Start() error {
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if err := os.MkdirAll(v.adapterDir, 0755); err != nil {
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return fmt.Errorf("mkdir adapter dir: %w", err)
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}
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if err := v.writeBundledAdapters(); err != nil {
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return fmt.Errorf("write bundled adapters: %w", err)
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}
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v.cache.setupGlobals()
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// 预加载：扫描适配器目录，全部编译到缓存
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entries, err := os.ReadDir(v.adapterDir)
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return err
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}
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for _, entry := range entries {
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if filepath.Ext(entry.Name()) != ".lua" {
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continue
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}
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path := filepath.Join(v.adapterDir, entry.Name())
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if err := v.cache.Preload(path); err != nil {
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fmt.Printf("[lua] preload %s: %v\n", entry.Name(), err)
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}
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}
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return nil
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}
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func (v *VM) Stop() {
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v.cache.Close()
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}
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// LoadAdapter 对外接口：从文件加载并编译适配器到缓存（运行时安全，不影响其他适配器）
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func (v *VM) LoadAdapter(path string) error {
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return v.cache.Preload(path)
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}
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// RemoveAdapter 对外接口：从缓存移除适配器（运行时安全）
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func (v *VM) RemoveAdapter(name string) {
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v.cache.Remove(name)
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}
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func (v *VM) ListAdapters() []APIAdapter {
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return v.cache.List()
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}
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func (v *VM) CallTransformRequest(name, rawJSON string) (string, error) {
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adapter := v.cache.Get(name)
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if adapter == nil {
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return "", fmt.Errorf("adapter %s not loaded", name)
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}
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v.mu.Lock()
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defer v.mu.Unlock()
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fn := adapter.RawGetString("transform_request")
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if fn == nil {
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return "", fmt.Errorf("adapter %s missing transform_request", name)
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}
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state := v.cache.state
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state.Push(fn)
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state.Push(lua.LString(rawJSON))
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if err := state.PCall(1, 1, nil); err != nil {
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return "", fmt.Errorf("transform_request: %w", err)
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}
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result := state.Get(-1)
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state.Pop(1)
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return result.String(), nil
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}
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func (v *VM) CallTransformResponse(name, rawJSON string) (string, error) {
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adapter := v.cache.Get(name)
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if adapter == nil {
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return rawJSON, nil
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}
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v.mu.Lock()
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defer v.mu.Unlock()
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fn := adapter.RawGetString("transform_response")
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if fn == nil {
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return rawJSON, nil
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}
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state := v.cache.state
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state.Push(fn)
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state.Push(lua.LString(rawJSON))
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if err := state.PCall(1, 1, nil); err != nil {
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return "", fmt.Errorf("transform_response: %w", err)
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}
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result := state.Get(-1)
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state.Pop(1)
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return result.String(), nil
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}
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func (v *VM) CallTransformStreamChunk(name, rawLine string) (string, error) {
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adapter := v.cache.Get(name)
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if adapter == nil {
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return rawLine, nil
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}
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v.mu.Lock()
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defer v.mu.Unlock()
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fn := adapter.RawGetString("transform_stream_chunk")
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if fn == nil {
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return rawLine, nil
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}
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state := v.cache.state
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state.Push(fn)
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state.Push(lua.LString(rawLine))
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if err := state.PCall(1, 1, nil); err != nil {
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return "", fmt.Errorf("transform_stream_chunk: %w", err)
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}
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result := state.Get(-1)
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state.Pop(1)
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if result.String() == "" {
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return "", nil
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}
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return result.String(), nil
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}
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func (v *VM) GetAdapterEndpoint(name string) string {
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adapter := v.cache.Get(name)
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if adapter == nil {
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return ""
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}
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if ep := adapter.RawGetString("endpoint"); ep != nil {
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return ep.String()
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}
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return ""
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}
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func (v *VM) GetAdapterHeaders(name string) map[string]string {
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adapter := v.cache.Get(name)
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if adapter == nil {
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return nil
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}
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headers := make(map[string]string)
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if ht := adapter.RawGetString("headers"); ht != nil {
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if tbl, ok := ht.(*lua.LTable); ok {
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tbl.ForEach(func(key, val lua.LValue) {
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headers[key.String()] = val.String()
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})
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}
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}
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return headers
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}
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func (v *VM) writeBundledAdapters() error {
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known := []string{
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"openai", "anthropic", "deepseek", "gemini",
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"github", "groq", "mistral", "ollama",
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}
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for _, name := range known {
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srcPath := "adapters/" + name + ".lua"
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dstPath := filepath.Join(v.adapterDir, name+".lua")
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if _, err := os.Stat(dstPath); err == nil {
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continue
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}
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data, err := bundledAdapters.ReadFile(srcPath)
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if err != nil {
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continue
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}
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if err := os.WriteFile(dstPath, data, 0644); err != nil {
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return fmt.Errorf("write %s: %w", name+".lua", err)
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}
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fmt.Printf("[lua] installed bundled adapter: %s\n", name+".lua")
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}
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return nil
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}
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func luaValueToGo(lv lua.LValue) interface{} {
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switch v := lv.(type) {
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case lua.LString:
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return string(v)
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case lua.LNumber:
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return float64(v)
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case lua.LBool:
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return bool(v)
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case *lua.LTable:
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if v.MaxN() > 0 {
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arr := make([]interface{}, 0, v.MaxN())
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v.ForEach(func(_, val lua.LValue) {
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arr = append(arr, luaValueToGo(val))
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})
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return arr
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}
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m := make(map[string]interface{})
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v.ForEach(func(key, val lua.LValue) {
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m[key.String()] = luaValueToGo(val)
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})
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return m
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default:
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return nil
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}
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}
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func goValueToLua(L *lua.LState, val interface{}) lua.LValue {
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switch v := val.(type) {
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case string:
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return lua.LString(v)
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case float64:
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return lua.LNumber(v)
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case int:
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return lua.LNumber(v)
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case int64:
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return lua.LNumber(v)
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case bool:
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return lua.LBool(v)
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case nil:
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return lua.LNil
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case []interface{}:
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tbl := L.NewTable()
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for i, item := range v {
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tbl.RawSetInt(i+1, goValueToLua(L, item))
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}
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return tbl
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case map[string]interface{}:
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tbl := L.NewTable()
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for k, item := range v {
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tbl.RawSetString(k, goValueToLua(L, item))
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}
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return tbl
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default:
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return lua.LNil
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}
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}
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