83 lines
1.8 KiB
Go
83 lines
1.8 KiB
Go
package middleware
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import (
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"errors"
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"log/slog"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"runtime/debug"
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"strings"
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"github.com/gin-gonic/gin"
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)
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func Recovery(logger *slog.Logger) gin.HandlerFunc {
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return func(c *gin.Context) {
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defer func() {
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panicValue := recover()
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if panicValue == nil {
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return
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}
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brokenPipe := isBrokenPipe(panicValue)
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request := recoveryRequestDump(c.Request)
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if logger != nil {
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logger.ErrorContext(c.Request.Context(), "recovery from panic", "mod", "http", "error", panicValue, "request", request, "stack", string(debug.Stack()))
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}
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if brokenPipe {
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if err, ok := panicValue.(error); ok {
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_ = c.Error(err)
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}
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c.Abort()
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return
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}
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c.AbortWithStatus(http.StatusInternalServerError)
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}()
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c.Next()
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}
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}
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func isBrokenPipe(value any) bool {
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var networkError *net.OpError
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if !errors.As(asError(value), &networkError) {
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return false
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}
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var syscallError *os.SyscallError
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if !errors.As(networkError, &syscallError) {
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return false
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}
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message := strings.ToLower(syscallError.Error())
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return strings.Contains(message, "broken pipe") || strings.Contains(message, "connection reset by peer")
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}
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func asError(value any) error {
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err, _ := value.(error)
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return err
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}
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func recoveryRequestDump(request *http.Request) string {
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if request == nil {
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return ""
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}
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clone := request.Clone(request.Context())
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clone.Header = request.Header.Clone()
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for key := range clone.Header {
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if isSensitiveHeader(key) {
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clone.Header[key] = []string{redactedValue}
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}
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}
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if request.URL != nil {
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clone.URL = new(url.URL)
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*clone.URL = *request.URL
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clone.URL.RawQuery = redactQuery(request.URL.RawQuery)
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clone.RequestURI = clone.URL.RequestURI()
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}
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dumped, err := httputil.DumpRequest(clone, false)
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if err != nil {
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return clone.Method + " " + clone.RequestURI
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}
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return string(dumped)
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}
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