mirror of
https://github.com/infinite-iroha/touka.git
synced 2026-02-03 08:51:11 +08:00
fix fileserver status chain
This commit is contained in:
wjqserver
parent
8ae88a77f0
commit
52b900db92
2 changed files with 99 additions and 13 deletions
69
ecw.go
69
ecw.go
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@ -1,6 +1,9 @@
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package touka
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import (
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"bufio"
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"errors"
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"net"
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"net/http"
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"sync"
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)
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@ -44,9 +47,9 @@ func (ecw *errorCapturingResponseWriter) reset(w http.ResponseWriter, r *http.Re
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// AcquireErrorCapturingResponseWriter 从对象池获取一个 errorCapturingResponseWriter 实例
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// 必须在处理完成后调用 ReleaseErrorCapturingResponseWriter
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func AcquireErrorCapturingResponseWriter(c *Context, eh ErrorHandler) *errorCapturingResponseWriter {
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func AcquireErrorCapturingResponseWriter(c *Context) *errorCapturingResponseWriter {
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ecw := errorResponseWriterPool.Get().(*errorCapturingResponseWriter)
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ecw.reset(c.Writer, c.Request, c, eh) // 传入 Touka Context 的 Writer
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ecw.reset(c.Writer, c.Request, c, c.engine.errorHandle.handler) // 传入 Touka Context 的 Writer
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return ecw
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}
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@ -74,9 +77,9 @@ func (ecw *errorCapturingResponseWriter) WriteHeader(statusCode int) {
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if ecw.responseStarted {
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return // 响应已开始, 忽略后续的 WriteHeader 调用
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}
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ecw.statusCode = statusCode // 总是记录 FileServer 意图的状态码
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ecw.statusCode = statusCode
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if statusCode >= http.StatusBadRequest {
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if ecw.Status() >= 400 {
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ecw.capturedErrorSignal = true
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// 是一个错误状态码 (>=400), 激活错误信号
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// 不会将这个 WriteHeader 传递给原始的 w, 等待 processAfterFileServer 处理
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@ -108,7 +111,7 @@ func (ecw *errorCapturingResponseWriter) Write(data []byte) (int, error) {
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for k, v := range ecw.headerSnapshot {
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ecw.w.Header()[k] = v // 直接赋值 []string, 保留所有值
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}
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ecw.w.WriteHeader(ecw.statusCode) // 发送实际的状态码 (可能是 200 或之前设置的 2xx)
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ecw.w.WriteHeader(ecw.Status()) // 发送实际的状态码 (可能是 200 或之前设置的 2xx)
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ecw.responseStarted = true
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}
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return ecw.w.Write(data) // 写入数据到原始 ResponseWriter
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@ -133,7 +136,7 @@ func (ecw *errorCapturingResponseWriter) processAfterFileServer() {
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ecw.ctx.Next()
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} else {
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// 调用用户自定义的 ErrorHandlerFunc, 由它负责完整的错误响应
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ecw.errorHandlerFunc(ecw.ctx, ecw.statusCode)
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ecw.errorHandlerFunc(ecw.ctx, ecw.Status())
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ecw.ctx.Abort()
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}
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}
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@ -141,3 +144,57 @@ func (ecw *errorCapturingResponseWriter) processAfterFileServer() {
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// 如果 ecw.capturedErrorSignal && ecw.responseStarted, 表示在捕获错误信号之前,
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// 成功路径的响应已经开始, 此时无法再进行错误处理覆盖
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}
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// Status 返回当前记录的状态码
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func (ecw *errorCapturingResponseWriter) Status() int {
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if ecw.statusCode == 0 && !ecw.responseStarted {
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// 如果还没有显式设置状态码, 并且响应尚未开始,
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// 则尝试从底层 ResponseWriter 获取状态码 (如果它实现了 Statuser)
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if tw, ok := ecw.w.(ResponseWriter); ok {
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return tw.Status()
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}
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// 否则, 默认返回 200 OK (Go HTTP server 的默认行为)
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return http.StatusOK
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}
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return ecw.statusCode
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}
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// Size 返回已写入响应体的字节数
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func (ecw *errorCapturingResponseWriter) Size() int {
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// ecw 在捕获错误信号时会丢弃 FileServer 写入的数据, 所以 Size 应返回 0
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if ecw.capturedErrorSignal {
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return 0
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}
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// 否则, 尝试从底层 ResponseWriter 获取已写入的字节数
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if tw, ok := ecw.w.(ResponseWriter); ok {
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return tw.Size()
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}
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// 对于其他类型的 ResponseWriter, 无法可靠获取, 只能返回 0
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return 0
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}
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// Written方式
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func (ecw *errorCapturingResponseWriter) Written() bool {
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// 如果响应已经通过这个包装器开始写入 (WriteHeader 或 Write 成功调用)
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// 或者如果原始 ResponseWriter 已经标记为 Written (例如, 如果它是 touka.ResponseWriterImpl)
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// 则认为响应已开始
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if ecw.responseStarted {
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return true
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}
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// 检查原始 ResponseWriter 是否已经写入
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if tw, ok := ecw.w.(ResponseWriter); ok {
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return tw.Written()
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}
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// 对于其他类型的 ResponseWriter, 无法可靠判断是否已写入, 只能依赖 responseStarted 标记
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return false
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}
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// Hijack 实现 http.Hijacker 接口
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// 它将 Hijack 调用委托给底层的 ResponseWriter
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func (ecw *errorCapturingResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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hijacker, ok := ecw.w.(http.Hijacker)
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if !ok {
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return nil, nil, errors.New("the underlying ResponseWriter does not support the Hijacker interface")
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}
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return hijacker.Hijack()
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}
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43
engine.go
43
engine.go
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@ -2,6 +2,7 @@ package touka
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import (
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"context"
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"log"
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"reflect"
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"runtime"
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"strings"
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@ -52,7 +53,8 @@ type Engine struct {
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noRoute HandlerFunc
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unMatchFS UnMatchFS // 未匹配下的处理
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unMatchFS UnMatchFS // 未匹配下的处理
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unMatchFileServer http.Handler // 处理handle
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serverProtocols *http.Protocols //服务协议
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Protocols ProtocolsConfig //协议版本配置
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@ -73,6 +75,9 @@ func defaultErrorHandle(c *Context, code int) { // 检查客户端是否已断
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return
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default:
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if c.Writer.Written() {
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return
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}
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// 输出json 状态码与状态码对应描述
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c.JSON(code, H{
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"code": code,
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@ -84,6 +89,22 @@ func defaultErrorHandle(c *Context, code int) { // 检查客户端是否已断
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}
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}
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// 默认errorhandle包装 避免竞争意外问题, 保证稳定性
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func defaultErrorWarp(handler ErrorHandler) ErrorHandler {
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return func(c *Context, code int) {
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select {
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case <-c.Request.Context().Done():
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return
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default:
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if c.Writer.Written() {
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log.Printf("errpage: response already started for status %d, skipping error page rendering", code)
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return
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}
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}
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handler(c, code)
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}
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}
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type UnMatchFS struct {
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FSForUnmatched http.FileSystem
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ServeUnmatchedAsFS bool
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@ -146,7 +167,7 @@ func Default() *Engine {
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// 设置自定义错误处理
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func (engine *Engine) SetErrorHandler(handler ErrorHandler) {
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engine.errorHandle.useDefault = false
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engine.errorHandle.handler = handler
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engine.errorHandle.handler = defaultErrorWarp(handler)
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}
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// 获取一个默认错误处理handle
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@ -159,8 +180,10 @@ func (engine *Engine) SetUnMatchFS(fs http.FileSystem) {
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if fs != nil {
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engine.unMatchFS.FSForUnmatched = fs
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engine.unMatchFS.ServeUnmatchedAsFS = true
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engine.unMatchFileServer = http.FileServer(fs)
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} else {
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engine.unMatchFS.ServeUnmatchedAsFS = false
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engine.unMatchFileServer = nil
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}
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}
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@ -442,14 +465,20 @@ func (engine *Engine) handleRequest(c *Context) {
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func unMatchFSHandle() HandlerFunc {
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return func(c *Context) {
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engine := c.engine
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// 确保 engine.unMatchFileServer 存在
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if !engine.unMatchFS.ServeUnmatchedAsFS || engine.unMatchFileServer == nil {
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c.Next() // 如果未配置或 FileSystem 为 nil，则继续处理链
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return
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}
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if c.Request.Method == http.MethodGet || c.Request.Method == http.MethodHead {
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// 使用 http.FileServer 处理未匹配的请求
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fileServer := http.FileServer(engine.unMatchFS.FSForUnmatched)
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//fileServer := http.FileServer(engine.unMatchFS.FSForUnmatched)
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//ecw := newErrorCapturingResponseWriter(c, c.engine.errorHandle.handler)
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ecw := AcquireErrorCapturingResponseWriter(c, c.engine.errorHandle.handler)
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ecw := AcquireErrorCapturingResponseWriter(c)
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defer ReleaseErrorCapturingResponseWriter(ecw)
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fileServer.ServeHTTP(ecw, c.Request)
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c.engine.unMatchFileServer.ServeHTTP(ecw, c.Request)
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ecw.processAfterFileServer()
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c.Abort()
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return
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} else {
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if engine.noRoute == nil {
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@ -726,7 +755,7 @@ func (engine *Engine) Static(relativePath, rootPath string) {
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// 使用自定义的 ResponseWriter 包装器来捕获 FileServer 可能返回的错误状态码
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// 这样我们可以在 FileServer 返回 404 或 403 时，使用 Engine 的 ErrorHandler 进行统一处理
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ecw := AcquireErrorCapturingResponseWriter(c, c.engine.errorHandle.handler)
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ecw := AcquireErrorCapturingResponseWriter(c)
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defer ReleaseErrorCapturingResponseWriter(ecw)
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//
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@ -790,7 +819,7 @@ func (group *RouterGroup) Static(relativePath, rootPath string) {
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// 使用自定义的 ResponseWriter 包装器来捕获 FileServer 可能返回的错误状态码
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// 这样我们可以在 FileServer 返回 404 或 403 时，使用 Engine 的 ErrorHandler 进行统一处理
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ecw := AcquireErrorCapturingResponseWriter(c, group.engine.errorHandle.handler)
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ecw := AcquireErrorCapturingResponseWriter(c)
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defer ReleaseErrorCapturingResponseWriter(ecw)
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//
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