feat: production-grade hardening v1.1.0
- fix: Compile() defensive map copy, prevents post-compile Graph mutation - fix: correct 'origin'→'destination' in edge validation error message - feat: export ErrNotPaused/ErrAlreadyFinished for errors.Is() support - feat: WithPreNodeHook/WithPostNodeHook now support chaining (multiple hooks) - feat: Compile detects conflicting outgoing edge types on same node - fix: FileCheckpointer atomic write (tmp+rename, crash-safe) - fix: FileCheckpointer threadID path traversal validation - refactor: remove redundant continue in run() loop - docs: add doc.go package-level documentation - test: +7 test cases covering error paths, edge conflicts, hook chaining
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-33
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@@ -46,7 +46,7 @@ package main
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import (
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"context"
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GopherGraph "github.com/uncesam-ly/GopherGraph"
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GopherGraph "github.com/unclesam-ly/GopherGraph"
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)
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func main() {
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@@ -187,7 +187,7 @@ package main
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import (
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"context"
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GopherGraph "github.com/uncesam-ly/GopherGraph"
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GopherGraph "github.com/unclesam-ly/GopherGraph"
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)
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func main() {
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@@ -327,7 +327,7 @@ package main
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import (
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"context"
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GopherGraph "github.com/uncesam-ly/GopherGraph"
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GopherGraph "github.com/unclesam-ly/GopherGraph"
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)
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func main() {
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+32
-2
@@ -6,6 +6,7 @@ import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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)
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// Checkpointer 定义了持久化状态的接口,S 是工作流的强类型状态。
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@@ -31,8 +32,13 @@ func NewFileCheckpointer[S any](dir string) (*FileCheckpointer[S], error) {
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return &FileCheckpointer[S]{dir: dir}, nil
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}
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// Save 将 Thread 序列化为 JSON 并写入本地文件
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// Save 将 Thread 序列化为 JSON 并写入本地文件。
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// 采用“先写临时文件再原子重命名”的方式,防止写入中途程序崩溃导致文件损坏。
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func (fc *FileCheckpointer[S]) Save(ctx context.Context, threadID string, thread *Thread[S]) error {
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if err := validateThreadID(threadID); err != nil {
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return err
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}
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path := filepath.Join(fc.dir, threadID+".json")
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// 使用 MarshalIndent 方便人工阅读生成的 JSON 文件
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@@ -41,11 +47,23 @@ func (fc *FileCheckpointer[S]) Save(ctx context.Context, threadID string, thread
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return fmt.Errorf("failed to marshal thread: %w", err)
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}
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return os.WriteFile(path, data, 0644)
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// 原子写入:先写临时文件,再 Rename 替换,确保断电/崩溃安全
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tmpPath := path + ".tmp"
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if err := os.WriteFile(tmpPath, data, 0644); err != nil {
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return fmt.Errorf("failed to write temp file: %w", err)
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}
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if err := os.Rename(tmpPath, path); err != nil {
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return fmt.Errorf("failed to rename temp file: %w", err)
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}
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return nil
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}
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// Load 从本地文件中读取 JSON 并反序列化为 Thread。
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func (fc *FileCheckpointer[S]) Load(ctx context.Context, threadID string) (*Thread[S], error) {
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if err := validateThreadID(threadID); err != nil {
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return nil, err
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}
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path := filepath.Join(fc.dir, threadID+".json")
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data, err := os.ReadFile(path)
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@@ -60,3 +78,15 @@ func (fc *FileCheckpointer[S]) Load(ctx context.Context, threadID string) (*Thre
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return &thread, nil
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}
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// validateThreadID 校验 threadID 的合法性,防止路径穿越(path traversal)攻击。
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// threadID 中不允许出现目录分隔符或 ".." 序列。
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func validateThreadID(id string) error {
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if id == "" {
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return fmt.Errorf("threadID must not be empty")
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}
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if strings.ContainsAny(id, "/\\") || strings.Contains(id, "..") {
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return fmt.Errorf("threadID %q contains invalid characters", id)
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}
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return nil
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}
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@@ -0,0 +1,19 @@
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// Package GopherGraph 是一个用 Go 语言编写的代码即图(Code-as-Graph)智能体编排引擎,
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// 设计灵感来源于 Python 生态的 LangGraph。
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//
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// 它利用 Go 1.18+ 的泛型机制,让工作流的上下文状态在编译期就具备强类型约束,
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// 并依靠 Go 原生的 Goroutines 和 Channels 实现极高并发的本地数据流转。
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//
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// # 核心概念
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//
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// - [Graph] 图构建器:通过 [NewGraph] 创建,使用 AddNode/AddEdge 系列方法声明节点和连线。
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// - [CompiledGraph] 编译后的只读图:通过 [Graph.Compile] 生成,可直接调用 Start/Resume 运行。
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// - [Engine] 增强包装器:通过 [NewEngine] 创建,在 CompiledGraph 基础上叠加
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// StateCloner(深拷贝)、MaxSteps(死循环熔断)、PreNodeHook/PostNodeHook(生命周期钩子)。
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// - [Thread] 执行快照:承载当前状态、下一节点、暂停/结束标记,可序列化用于断点恢复。
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// - [Checkpointer] 持久化接口:内置 [FileCheckpointer] 实现基于 JSON 文件的状态存储。
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//
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// # 零外部依赖
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//
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// GopherGraph 仅使用 Go 标准库,无任何第三方依赖。
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package GopherGraph
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@@ -37,7 +37,7 @@ func (g *Graph[S]) Compile() (*CompiledGraph[S], error) {
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return nil, fmt.Errorf("compile error: edge origin %q does not exist", from)
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}
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if _, exists := g.nodes[to]; !exists {
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return nil, fmt.Errorf("compile error: edge origin %q does not exist", to)
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return nil, fmt.Errorf("compile error: edge destination %q does not exist", to)
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}
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}
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@@ -79,16 +79,60 @@ func (g *Graph[S]) Compile() (*CompiledGraph[S], error) {
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}
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}
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// 返回编译好的只读图
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// 校验同一节点的出边冲突:不能同时存在于 edges、conditional、parallels 中
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for node := range g.nodes {
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conflictCount := 0
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if _, ok := g.edges[node]; ok {
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conflictCount++
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}
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if _, ok := g.conditional[node]; ok {
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conflictCount++
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}
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if _, ok := g.parallels[node]; ok {
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conflictCount++
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}
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if conflictCount > 1 {
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return nil, fmt.Errorf("compile error: node %q has conflicting outgoing edges (defined in multiple edge types simultaneously)", node)
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}
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}
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// 返回编译好的只读图(防御性拷贝,阻止编译后修改 Graph 对 CompiledGraph 造成污染)
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nodesCopy := make(map[string]NodeFn[S], len(g.nodes))
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for k, v := range g.nodes {
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nodesCopy[k] = v
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}
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edgesCopy := make(map[string]string, len(g.edges))
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for k, v := range g.edges {
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edgesCopy[k] = v
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}
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conditionalCopy := make(map[string]RouterFn[S], len(g.conditional))
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for k, v := range g.conditional {
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conditionalCopy[k] = v
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}
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interruptsCopy := make(map[string]bool, len(g.interrupts))
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for k, v := range g.interrupts {
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interruptsCopy[k] = v
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}
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parallelsCopy := make(map[string]parallelStep[S], len(g.parallels))
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for k, v := range g.parallels {
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parallelsCopy[k] = v
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}
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return &CompiledGraph[S]{
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nodes: g.nodes,
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edges: g.edges,
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conditional: g.conditional,
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interrupts: g.interrupts,
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parallels: g.parallels,
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nodes: nodesCopy,
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edges: edgesCopy,
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conditional: conditionalCopy,
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interrupts: interruptsCopy,
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parallels: parallelsCopy,
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}, nil
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}
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// ErrNotPaused 在调用 Resume 时线程未处于暂停状态时返回。可用于 errors.Is 判断。
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var ErrNotPaused = errors.New("cannot resume: thread is not paused")
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// ErrAlreadyFinished 在调用 Resume 时线程已结束时返回。可用于 errors.Is 判断。
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var ErrAlreadyFinished = errors.New("cannot resume: thread is already finished")
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// Start 从指定的起始节点开始运行图,并持续流转,直到遇到中断或运行结束
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func (cg *CompiledGraph[S]) Start(ctx context.Context, startNode string, initialState S) (*Thread[S], error) {
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thread := &Thread[S]{
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@@ -102,10 +146,10 @@ func (cg *CompiledGraph[S]) Start(ctx context.Context, startNode string, initial
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// Resume 恢复执行一个被暂停的线程,并允许注入外部修改后的状态数据(例如人工审批修改后的结果)
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func (cg *CompiledGraph[S]) Resume(ctx context.Context, thread *Thread[S], modifiedState S) (*Thread[S], error) {
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if !thread.IsPaused {
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return nil, errors.New("cannot resume: thread is not paused")
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return nil, ErrNotPaused
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}
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if thread.IsFinished {
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return nil, errors.New("cannot resume: thread is already finished")
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return nil, ErrAlreadyFinished
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}
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// 注入人工修改后的状态,并解除暂停标记
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@@ -207,11 +251,6 @@ func (cg *CompiledGraph[S]) run(ctx context.Context, thread *Thread[S], opts run
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// 更新快照中的"下一个节点"
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thread.NextNode = nextNode
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// 如果下一站是终点,直接进入下一次循环触发结束逻辑
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if nextNode == "" {
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continue
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}
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// 核心中断机制:如果即将进入的下一个节点被标记为了中断节点,则在此挂起
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if cg.interrupts[nextNode] {
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thread.IsPaused = true
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+20
-12
@@ -76,7 +76,15 @@ func (e *Engine[S]) WithMaxSteps(n int) *Engine[S] {
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// 钩子函数接收到的 state 是节点执行【前】的状态快照,请勿修改(只读语义)。
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// 钩子中的 panic 会向上传播,建议在内部做好 recover。
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func (e *Engine[S]) WithPreNodeHook(fn HookFn[S]) *Engine[S] {
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e.preNodeHook = fn
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if e.preNodeHook == nil {
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e.preNodeHook = fn
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} else {
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prev := e.preNodeHook
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e.preNodeHook = func(ctx context.Context, name string, s S) {
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prev(ctx, name, s)
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fn(ctx, name, s)
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}
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}
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return e
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}
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@@ -89,7 +97,15 @@ func (e *Engine[S]) WithPreNodeHook(fn HookFn[S]) *Engine[S] {
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//
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// 钩子函数接收到的 state 是节点执行【后】更新过的状态,同为只读语义。
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func (e *Engine[S]) WithPostNodeHook(fn HookFn[S]) *Engine[S] {
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e.postNodeHook = fn
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if e.postNodeHook == nil {
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e.postNodeHook = fn
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} else {
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prev := e.postNodeHook
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e.postNodeHook = func(ctx context.Context, name string, s S) {
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prev(ctx, name, s)
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fn(ctx, name, s)
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}
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}
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return e
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}
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@@ -117,10 +133,10 @@ func (e *Engine[S]) Start(ctx context.Context, startNode string, initialState S)
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// 但会附加所有已注册的 Engine 增强选项(Hooks、MaxSteps、StateCloner)。
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func (e *Engine[S]) Resume(ctx context.Context, thread *Thread[S], modifiedState S) (*Thread[S], error) {
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if !thread.IsPaused {
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return nil, errNotPaused
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return nil, ErrNotPaused
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}
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if thread.IsFinished {
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return nil, errAlreadyFinished
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return nil, ErrAlreadyFinished
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}
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thread.State = modifiedState
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@@ -129,12 +145,4 @@ func (e *Engine[S]) Resume(ctx context.Context, thread *Thread[S], modifiedState
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return e.graph.run(ctx, thread, e.opts())
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}
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// 复用与 CompiledGraph.Resume 中相同的哨兵错误,避免魔法字符串重复
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var (
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errNotPaused = errStr("cannot resume: thread is not paused")
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errAlreadyFinished = errStr("cannot resume: thread is already finished")
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)
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type errStr string
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func (e errStr) Error() string { return string(e) }
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@@ -6,7 +6,7 @@ import (
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"log"
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"time"
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GopherGraph "github.com/unclesam-LY/GopherGraph"
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GopherGraph "github.com/unclesam-ly/GopherGraph"
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)
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// AgentState 是这个示例工作流的状态
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@@ -7,7 +7,7 @@ import (
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"os"
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"strings"
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GopherGraph "github.com/unclesam-LY/GopherGraph"
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GopherGraph "github.com/unclesam-ly/GopherGraph"
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)
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// TranslationState 代表我们工作流的共享状态(State)
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+223
@@ -452,3 +452,226 @@ func TestLifecycleHooks(t *testing.T) {
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}
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}
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}
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// TestResumeErrors 验证 Resume 对非暂停/已结束线程的错误路径
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func TestResumeErrors(t *testing.T) {
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g := NewGraph[TestState]()
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g.AddNode("A", func(ctx context.Context, s TestState) (TestState, error) {
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return s, nil
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})
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cg, err := g.Compile()
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if err != nil {
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t.Fatalf("编译图失败: %v", err)
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}
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// 1. Resume 非暂停的线程
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thread := &Thread[TestState]{NextNode: "A"}
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_, err = cg.Resume(context.Background(), thread, TestState{})
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if !errors.Is(err, ErrNotPaused) {
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t.Errorf("期望 ErrNotPaused,实际: %v", err)
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}
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// 2. Resume 已结束的线程
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thread2 := &Thread[TestState]{IsPaused: true, IsFinished: true}
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_, err = cg.Resume(context.Background(), thread2, TestState{})
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if !errors.Is(err, ErrAlreadyFinished) {
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t.Errorf("期望 ErrAlreadyFinished,实际: %v", err)
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}
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// 3. Engine.Resume 也应返回相同的哨兵错误
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engine := NewEngine(cg)
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_, err = engine.Resume(context.Background(), &Thread[TestState]{NextNode: "A"}, TestState{})
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if !errors.Is(err, ErrNotPaused) {
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t.Errorf("Engine.Resume: 期望 ErrNotPaused,实际: %v", err)
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}
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}
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// TestCompileValidationErrors 验证 Compile 对各种非法图结构的校验
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func TestCompileValidationErrors(t *testing.T) {
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// 1. 空图
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g1 := NewGraph[TestState]()
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_, err := g1.Compile()
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if err == nil || !strings.Contains(err.Error(), "no nodes") {
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t.Errorf("空图应报错: %v", err)
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}
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// 2. 边指向不存在的节点
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g2 := NewGraph[TestState]()
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g2.AddNode("A", func(ctx context.Context, s TestState) (TestState, error) { return s, nil })
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g2.AddEdge("A", "nonexistent")
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_, err = g2.Compile()
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if err == nil || !strings.Contains(err.Error(), "destination") {
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t.Errorf("边指向不存在节点应报 destination 错误: %v", err)
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}
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// 3. 中断节点不存在
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g3 := NewGraph[TestState]()
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g3.AddNode("A", func(ctx context.Context, s TestState) (TestState, error) { return s, nil })
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g3.AddInterrupt("ghost")
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_, err = g3.Compile()
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if err == nil || !strings.Contains(err.Error(), "interrupt") {
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t.Errorf("不存在的中断节点应报错: %v", err)
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}
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}
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// TestCompileEdgeConflict 验证同一节点不能同时存在于多种出边类型中
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func TestCompileEdgeConflict(t *testing.T) {
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g := NewGraph[TestState]()
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g.AddNode("A", func(ctx context.Context, s TestState) (TestState, error) { return s, nil })
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g.AddNode("B", func(ctx context.Context, s TestState) (TestState, error) { return s, nil })
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// 同时为 A 设置静态边和条件路由
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g.AddEdge("A", "B")
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g.AddConditionalEdges("A", func(ctx context.Context, s TestState) (string, error) {
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return "B", nil
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})
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_, err := g.Compile()
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if err == nil || !strings.Contains(err.Error(), "conflicting") {
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t.Errorf("出边冲突应报错: %v", err)
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}
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}
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// TestRouterReturnsNonExistentNode 验证路由函数返回不存在的节点名时的运行时错误
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func TestRouterReturnsNonExistentNode(t *testing.T) {
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g := NewGraph[TestState]()
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g.AddNode("start", func(ctx context.Context, s TestState) (TestState, error) { return s, nil })
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g.AddConditionalEdges("start", func(ctx context.Context, s TestState) (string, error) {
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return "nonexistent_node", nil
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})
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cg, err := g.Compile()
|
||||
if err != nil {
|
||||
t.Fatalf("编译图失败: %v", err)
|
||||
}
|
||||
|
||||
_, err = cg.Start(context.Background(), "start", TestState{})
|
||||
if err == nil || !strings.Contains(err.Error(), "not found") {
|
||||
t.Errorf("路由到不存在节点应返回 runtime error: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// TestParallelWithStateCloner 验证 StateCloner 在并发分支中正确隔离引用类型
|
||||
func TestParallelWithStateCloner(t *testing.T) {
|
||||
g := NewGraph[TestState]()
|
||||
|
||||
g.AddNode("start", func(ctx context.Context, s TestState) (TestState, error) {
|
||||
s.Log = append(s.Log, "start")
|
||||
return s, nil
|
||||
})
|
||||
// 两个分支都向 Log 切片追加元素
|
||||
g.AddNode("branch1", func(ctx context.Context, s TestState) (TestState, error) {
|
||||
s.Log = append(s.Log, "branch1")
|
||||
s.Value = 10
|
||||
return s, nil
|
||||
})
|
||||
g.AddNode("branch2", func(ctx context.Context, s TestState) (TestState, error) {
|
||||
s.Log = append(s.Log, "branch2")
|
||||
s.Value = 20
|
||||
return s, nil
|
||||
})
|
||||
|
||||
g.AddParallelEdges("start", []string{"branch1", "branch2"}, "",
|
||||
func(ctx context.Context, parent TestState, branches []TestState) (TestState, error) {
|
||||
for _, b := range branches {
|
||||
parent.Value += b.Value
|
||||
}
|
||||
return parent, nil
|
||||
},
|
||||
)
|
||||
|
||||
cg, err := g.Compile()
|
||||
if err != nil {
|
||||
t.Fatalf("编译图失败: %v", err)
|
||||
}
|
||||
|
||||
// 使用 Engine + StateCloner 运行
|
||||
engine := NewEngine(cg).WithStateCloner(func(s TestState) TestState {
|
||||
clone := s
|
||||
clone.Log = append([]string{}, s.Log...)
|
||||
return clone
|
||||
})
|
||||
|
||||
thread, err := engine.Start(context.Background(), "start", TestState{})
|
||||
if err != nil {
|
||||
t.Fatalf("启动图失败: %v", err)
|
||||
}
|
||||
if thread.State.Value != 30 {
|
||||
t.Errorf("期望 Value 为 30,实际为 %d", thread.State.Value)
|
||||
}
|
||||
}
|
||||
|
||||
// TestHookChaining 验证多次调用 WithPreNodeHook/WithPostNodeHook 时钩子按顺序叠加
|
||||
func TestHookChaining(t *testing.T) {
|
||||
g := NewGraph[TestState]()
|
||||
g.AddNode("A", func(ctx context.Context, s TestState) (TestState, error) {
|
||||
return s, nil
|
||||
})
|
||||
cg, _ := g.Compile()
|
||||
|
||||
var log []string
|
||||
engine := NewEngine(cg).
|
||||
WithPreNodeHook(func(ctx context.Context, name string, s TestState) {
|
||||
log = append(log, "pre1:"+name)
|
||||
}).
|
||||
WithPreNodeHook(func(ctx context.Context, name string, s TestState) {
|
||||
log = append(log, "pre2:"+name)
|
||||
}).
|
||||
WithPostNodeHook(func(ctx context.Context, name string, s TestState) {
|
||||
log = append(log, "post1:"+name)
|
||||
}).
|
||||
WithPostNodeHook(func(ctx context.Context, name string, s TestState) {
|
||||
log = append(log, "post2:"+name)
|
||||
})
|
||||
|
||||
engine.Start(context.Background(), "A", TestState{})
|
||||
|
||||
expected := []string{"pre1:A", "pre2:A", "post1:A", "post2:A"}
|
||||
if len(log) != len(expected) {
|
||||
t.Fatalf("期望 %d 次 hook 触发,实际 %d 次: %v", len(expected), len(log), log)
|
||||
}
|
||||
for i, entry := range expected {
|
||||
if log[i] != entry {
|
||||
t.Errorf("第 %d 次 hook 期望 %q,实际 %q", i, entry, log[i])
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// TestCheckpointerThreadIDValidation 验证 FileCheckpointer 对恶意 threadID 的防御
|
||||
func TestCheckpointerThreadIDValidation(t *testing.T) {
|
||||
tmpDir := t.TempDir()
|
||||
fc, err := NewFileCheckpointer[TestState](tmpDir)
|
||||
if err != nil {
|
||||
t.Fatalf("创建 FileCheckpointer 失败: %v", err)
|
||||
}
|
||||
|
||||
thread := &Thread[TestState]{State: TestState{Value: 1}}
|
||||
ctx := context.Background()
|
||||
|
||||
// 空 ID
|
||||
if err := fc.Save(ctx, "", thread); err == nil {
|
||||
t.Error("空 threadID 应报错")
|
||||
}
|
||||
|
||||
// 路径穿越
|
||||
if err := fc.Save(ctx, "../escape", thread); err == nil {
|
||||
t.Error("包含 .. 的 threadID 应报错")
|
||||
}
|
||||
|
||||
// 目录分隔符
|
||||
if err := fc.Save(ctx, "sub/dir", thread); err == nil {
|
||||
t.Error("包含 / 的 threadID 应报错")
|
||||
}
|
||||
|
||||
// Load 同样校验
|
||||
_, err = fc.Load(ctx, "../escape")
|
||||
if err == nil {
|
||||
t.Error("Load 包含 .. 的 threadID 应报错")
|
||||
}
|
||||
|
||||
// 合法 ID 应成功
|
||||
if err := fc.Save(ctx, "valid-id_123", thread); err != nil {
|
||||
t.Errorf("合法 threadID 不应报错: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
Reference in new issue
Block a user