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Prevent panics with missing storage (#13164)

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* The `.Use` of storageHandler before setting up the template renderer
causes a panic if there is an error to log.
* The error passed to `ctx.Error` in that case may contain sensitive
information and should not be rendered to the end user. We should
instead log the error and render a simple error message.
* There is no handling of missing avatars and this needs a 404. Minio
errors need to be mapped to standard golang errors such as
os.ErrNotExist.
* There is no logging when storage is set up.

Related #13159

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2020-10-16 04:51:06 +01:00 committed by GitHub
parent cb171dbd56
commit 91f2afdb54
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 64 additions and 19 deletions
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2
modules/storage/local.go
View file

@ -11,6 +11,7 @@ import (
"os"
"path/filepath"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
@ -40,6 +41,7 @@ func NewLocalStorage(ctx context.Context, cfg interface{}) (ObjectStorage, error
}
config := configInterface.(LocalStorageConfig)
log.Info("Creating new Local Storage at %s", config.Path)
if err := os.MkdirAll(config.Path, os.ModePerm); err != nil {
return nil, err
}

52
modules/storage/minio.go
View file

@ -13,6 +13,8 @@ import (
"strings"
"time"
"code.gitea.io/gitea/modules/log"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
)
@ -58,20 +60,42 @@ type MinioStorage struct {
basePath string
}
func convertMinioErr(err error) error {
if err == nil {
return nil
}
errResp, ok := err.(minio.ErrorResponse)
if !ok {
return err
}
// Convert two responses to standard analogues
switch errResp.Code {
case "NoSuchKey":
return os.ErrNotExist
case "AccessDenied":
return os.ErrPermission
}
return err
}
// NewMinioStorage returns a minio storage
func NewMinioStorage(ctx context.Context, cfg interface{}) (ObjectStorage, error) {
configInterface, err := toConfig(MinioStorageConfig{}, cfg)
if err != nil {
return nil, err
return nil, convertMinioErr(err)
}
config := configInterface.(MinioStorageConfig)
log.Info("Creating Minio storage at %s:%s with base path %s", config.Endpoint, config.Bucket, config.BasePath)
minioClient, err := minio.New(config.Endpoint, &minio.Options{
Creds: credentials.NewStaticV4(config.AccessKeyID, config.SecretAccessKey, ""),
Secure: config.UseSSL,
})
if err != nil {
return nil, err
return nil, convertMinioErr(err)
}
if err := minioClient.MakeBucket(ctx, config.Bucket, minio.MakeBucketOptions{
@ -80,7 +104,7 @@ func NewMinioStorage(ctx context.Context, cfg interface{}) (ObjectStorage, error
// Check to see if we already own this bucket (which happens if you run this twice)
exists, errBucketExists := minioClient.BucketExists(ctx, config.Bucket)
if !exists || errBucketExists != nil {
return nil, err
return nil, convertMinioErr(err)
}
}
@ -101,7 +125,7 @@ func (m *MinioStorage) Open(path string) (Object, error) {
var opts = minio.GetObjectOptions{}
object, err := m.client.GetObject(m.ctx, m.bucket, m.buildMinioPath(path), opts)
if err != nil {
return nil, err
return nil, convertMinioErr(err)
}
return &minioObject{object}, nil
}
@ -117,7 +141,7 @@ func (m *MinioStorage) Save(path string, r io.Reader) (int64, error) {
minio.PutObjectOptions{ContentType: "application/octet-stream"},
)
if err != nil {
return 0, err
return 0, convertMinioErr(err)
}
return uploadInfo.Size, nil
}
@ -159,19 +183,16 @@ func (m *MinioStorage) Stat(path string) (os.FileInfo, error) {
minio.StatObjectOptions{},
)
if err != nil {
if errResp, ok := err.(minio.ErrorResponse); ok {
if errResp.Code == "NoSuchKey" {
return nil, os.ErrNotExist
}
}
return nil, err
return nil, convertMinioErr(err)
}
return &minioFileInfo{info}, nil
}
// Delete delete a file
func (m *MinioStorage) Delete(path string) error {
return m.client.RemoveObject(m.ctx, m.bucket, m.buildMinioPath(path), minio.RemoveObjectOptions{})
err := m.client.RemoveObject(m.ctx, m.bucket, m.buildMinioPath(path), minio.RemoveObjectOptions{})
return convertMinioErr(err)
}
// URL gets the redirect URL to a file. The presigned link is valid for 5 minutes.
@ -179,7 +200,8 @@ func (m *MinioStorage) URL(path, name string) (*url.URL, error) {
reqParams := make(url.Values)
// TODO it may be good to embed images with 'inline' like ServeData does, but we don't want to have to read the file, do we?
reqParams.Set("response-content-disposition", "attachment; filename=\""+quoteEscaper.Replace(name)+"\"")
return m.client.PresignedGetObject(m.ctx, m.bucket, m.buildMinioPath(path), 5*time.Minute, reqParams)
u, err := m.client.PresignedGetObject(m.ctx, m.bucket, m.buildMinioPath(path), 5*time.Minute, reqParams)
return u, convertMinioErr(err)
}
// IterateObjects iterates across the objects in the miniostorage
@ -193,13 +215,13 @@ func (m *MinioStorage) IterateObjects(fn func(path string, obj Object) error) er
}) {
object, err := m.client.GetObject(lobjectCtx, m.bucket, mObjInfo.Key, opts)
if err != nil {
return err
return convertMinioErr(err)
}
if err := func(object *minio.Object, fn func(path string, obj Object) error) error {
defer object.Close()
return fn(strings.TrimPrefix(m.basePath, mObjInfo.Key), &minioObject{object})
}(object, fn); err != nil {
return err
return convertMinioErr(err)
}
}
return nil

5
modules/storage/storage.go
View file

@ -12,6 +12,7 @@ import (
"net/url"
"os"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
@ -141,21 +142,25 @@ func NewStorage(typStr string, cfg interface{}) (ObjectStorage, error) {
}
func initAvatars() (err error) {
log.Info("Initialising Avatar storage with type: %s", setting.Avatar.Storage.Type)
Avatars, err = NewStorage(setting.Avatar.Storage.Type, setting.Avatar.Storage)
return
}
func initAttachments() (err error) {
log.Info("Initialising Attachment storage with type: %s", setting.Attachment.Storage.Type)
Attachments, err = NewStorage(setting.Attachment.Storage.Type, setting.Attachment.Storage)
return
}
func initLFS() (err error) {
log.Info("Initialising LFS storage with type: %s", setting.LFS.Storage.Type)
LFS, err = NewStorage(setting.LFS.Storage.Type, setting.LFS.Storage)
return
}
func initRepoAvatars() (err error) {
log.Info("Initialising Repository Avatar storage with type: %s", setting.RepoAvatar.Storage.Type)
RepoAvatars, err = NewStorage(setting.RepoAvatar.Storage.Type, setting.RepoAvatar.Storage)
return
}

24
routers/routes/routes.go
View file

@ -7,8 +7,10 @@ package routes
import (
"bytes"
"encoding/gob"
"fmt"
"io"
"net/http"
"os"
"path"
"strings"
"text/template"
@ -125,7 +127,13 @@ func storageHandler(storageSetting setting.Storage, prefix string, objStore stor
rPath := strings.TrimPrefix(req.RequestURI, "/"+prefix)
u, err := objStore.URL(rPath, path.Base(rPath))
if err != nil {
ctx.Error(500, err.Error())
if err == os.ErrNotExist {
log.Warn("Unable to find %s %s", prefix, rPath)
ctx.Error(404, "file not found")
return
}
log.Error("Error whilst getting URL for %s %s. Error: %v", prefix, rPath, err)
ctx.Error(500, fmt.Sprintf("Error whilst getting URL for %s %s", prefix, rPath))
return
}
http.Redirect(
@ -152,14 +160,21 @@ func storageHandler(storageSetting setting.Storage, prefix string, objStore stor
//If we have matched and access to release or issue
fr, err := objStore.Open(rPath)
if err != nil {
ctx.Error(500, err.Error())
if err == os.ErrNotExist {
log.Warn("Unable to find %s %s", prefix, rPath)
ctx.Error(404, "file not found")
return
}
log.Error("Error whilst opening %s %s. Error: %v", prefix, rPath, err)
ctx.Error(500, fmt.Sprintf("Error whilst opening %s %s", prefix, rPath))
return
}
defer fr.Close()
_, err = io.Copy(ctx.Resp, fr)
if err != nil {
ctx.Error(500, err.Error())
log.Error("Error whilst rendering %s %s. Error: %v", prefix, rPath, err)
ctx.Error(500, fmt.Sprintf("Error whilst rendering %s %s", prefix, rPath))
return
}
}
@ -208,10 +223,11 @@ func NewMacaron() *macaron.Macaron {
},
))
m.Use(templates.HTMLRenderer())
m.Use(storageHandler(setting.Avatar.Storage, "avatars", storage.Avatars))
m.Use(storageHandler(setting.RepoAvatar.Storage, "repo-avatars", storage.RepoAvatars))
m.Use(templates.HTMLRenderer())
mailer.InitMailRender(templates.Mailer())
localeNames, err := options.Dir("locale")