mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-26 09:24:07 -05:00
ca00ca8ee4
This PR gitea'ises the macaron.Recovery() handler meaning that in the event of panic we get proper gitea 500 pages and the stacktrace is logged with the gitea logger. Signed-off-by: Andrew Thornton <art27@cantab.net>
112 lines
3.4 KiB
Go
112 lines
3.4 KiB
Go
// Copyright 2013 Martini Authors
|
|
// Copyright 2014 The Macaron Authors
|
|
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
|
// not use this file except in compliance with the License. You may obtain
|
|
// a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
// License for the specific language governing permissions and limitations
|
|
// under the License.
|
|
|
|
package context
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"runtime"
|
|
|
|
macaron "gopkg.in/macaron.v1"
|
|
)
|
|
|
|
// Recovery returns a middleware that recovers from any panics and writes a 500 and a log if so.
|
|
// Although similar to macaron.Recovery() the main difference is that this error will be created
|
|
// with the gitea 500 page.
|
|
func Recovery() macaron.Handler {
|
|
return func(ctx *Context) {
|
|
defer func() {
|
|
if err := recover(); err != nil {
|
|
combinedErr := fmt.Errorf("%s\n%s", err, string(stack(3)))
|
|
ctx.ServerError("PANIC:", combinedErr)
|
|
}
|
|
}()
|
|
|
|
ctx.Next()
|
|
}
|
|
}
|
|
|
|
var (
|
|
unknown = []byte("???")
|
|
)
|
|
|
|
// Although we could just use debug.Stack(), this routine will return the source code
|
|
// skip the provided number of frames - i.e. allowing us to ignore this function call
|
|
// and the preceding function call.
|
|
// If the problem is a lack of memory of course all this is not going to work...
|
|
func stack(skip int) []byte {
|
|
buf := new(bytes.Buffer)
|
|
|
|
// Store the last file we opened as its probable that the preceding stack frame
|
|
// will be in the same file
|
|
var lines [][]byte
|
|
var lastFilename string
|
|
for i := skip; ; i++ { // Skip over frames
|
|
programCounter, filename, lineNumber, ok := runtime.Caller(i)
|
|
// If we can't retrieve the information break - basically we're into go internals at this point.
|
|
if !ok {
|
|
break
|
|
}
|
|
|
|
// Print equivalent of debug.Stack()
|
|
fmt.Fprintf(buf, "%s:%d (0x%x)\n", filename, lineNumber, programCounter)
|
|
// Now try to print the offending line
|
|
if filename != lastFilename {
|
|
data, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
// can't read this sourcefile
|
|
// likely we don't have the sourcecode available
|
|
continue
|
|
}
|
|
lines = bytes.Split(data, []byte{'\n'})
|
|
lastFilename = filename
|
|
}
|
|
fmt.Fprintf(buf, "\t%s: %s\n", functionName(programCounter), source(lines, lineNumber))
|
|
}
|
|
return buf.Bytes()
|
|
}
|
|
|
|
// functionName converts the provided programCounter into a function name
|
|
func functionName(programCounter uintptr) []byte {
|
|
function := runtime.FuncForPC(programCounter)
|
|
if function == nil {
|
|
return unknown
|
|
}
|
|
name := []byte(function.Name())
|
|
|
|
// Because we provide the filename we can drop the preceding package name.
|
|
if lastslash := bytes.LastIndex(name, []byte("/")); lastslash >= 0 {
|
|
name = name[lastslash+1:]
|
|
}
|
|
// And the current package name.
|
|
if period := bytes.Index(name, []byte(".")); period >= 0 {
|
|
name = name[period+1:]
|
|
}
|
|
// And we should just replace the interpunct with a dot
|
|
name = bytes.Replace(name, []byte("·"), []byte("."), -1)
|
|
return name
|
|
}
|
|
|
|
// source returns a space-trimmed slice of the n'th line.
|
|
func source(lines [][]byte, n int) []byte {
|
|
n-- // in stack trace, lines are 1-indexed but our array is 0-indexed
|
|
if n < 0 || n >= len(lines) {
|
|
return unknown
|
|
}
|
|
return bytes.TrimSpace(lines[n])
|
|
}
|