1 files changed, 25 insertions, 2 deletions
diff --git a/echo/middleware/recover_middleware.go b/echo/middleware/recover_middleware.go
index 310e146..af4259a 100644
--- a/echo/middleware/recover_middleware.go
+++ b/echo/middleware/recover_middleware.go
@@ -1,9 +1,11 @@
 package middleware
 import (
+        "bytes"
        "fmt"
        "net/http"
        "runtime"
+        "text/template"
        "github.com/labstack/echo/v4"
        "github.com/labstack/echo/v4/middleware"
@@ -49,6 +51,16 @@ var (
                DisablePrintStack: false,
                LogLevel:          0,
        }
+        defaultErrorTemplate = `<html>
+                <head>
+                        <title>Error</title>
+                        <style type="text/css">
+                                pre { border: 1px solid black; padding: 1em; background: #f0f0f0; font-size: 1.5em; }
+                        </style>
+                </head>
+                <body><h1>Error</h1><pre>{{ . }}</pre></body>
+        </html>
+        `
 )
 // Recover returns a middleware which recovers from panics anywhere in the chain
@@ -68,6 +80,11 @@ func RecoverWithConfig(config RecoverConfig) echo.MiddlewareFunc {
                config.StackSize = DefaultRecoverConfig.StackSize
        }
+        errorTemplate, err := template.New("").Parse(defaultErrorTemplate)
+        if err != nil {
+                panic("RecoverWithConfig: error parsing html template")
+        }
        return func(next echo.HandlerFunc) echo.HandlerFunc {
                return func(c echo.Context) error {
                        if config.Skipper(c) {
@@ -100,8 +117,14 @@ func RecoverWithConfig(config RecoverConfig) echo.MiddlewareFunc {
                                                }
                                        }
                                        if c.Echo().Debug {
-                                                msg := fmt.Sprintf("%v %s\n", err, stack[:length])
+                                                buf := bytes.Buffer{}
-                                                c.String(http.StatusInternalServerError, msg)
+                                                msg := fmt.Sprintf("%v\n\n%s", err, stack[:length])
+                                                if err := errorTemplate.Execute(&buf, msg); err != nil {
+                                                        c.Logger().Errorf("Error rendering HTML error page: %s", err)
+                                                        c.String(http.StatusInternalServerError, msg)
+                                                        return
+                                                }
+                                                c.HTMLBlob(http.StatusInternalServerError, buf.Bytes())
                                        } else {
                                                c.Error(err)
                                        }