Move macaron to chi (#14293)

Use [chi](https://github.com/go-chi/chi) instead of the forked [macaron](https://gitea.com/macaron/macaron). Since macaron and chi have conflicts with session share, this big PR becomes a have-to thing. According my previous idea, we can replace macaron step by step but I'm wrong. :( Below is a list of big changes on this PR.

- [x] Define `context.ResponseWriter` interface with an implementation `context.Response`.
- [x] Use chi instead of macaron, and also a customize `Route` to wrap chi so that the router usage is similar as before.
- [x] Create different routers for `web`, `api`, `internal` and `install` so that the codes will be more clear and no magic .
- [x] Use https://github.com/unrolled/render instead of macaron's internal render
- [x] Use https://github.com/NYTimes/gziphandler instead of https://gitea.com/macaron/gzip
- [x] Use https://gitea.com/go-chi/session which is a modified version of https://gitea.com/macaron/session and removed `nodb` support since it will not be maintained. **BREAK**
- [x] Use https://gitea.com/go-chi/captcha which is a modified version of https://gitea.com/macaron/captcha
- [x] Use https://gitea.com/go-chi/cache which is a modified version of https://gitea.com/macaron/cache
- [x] Use https://gitea.com/go-chi/binding which is a modified version of https://gitea.com/macaron/binding
- [x] Use https://github.com/go-chi/cors instead of https://gitea.com/macaron/cors
- [x] Dropped https://gitea.com/macaron/i18n and make a new one in `code.gitea.io/gitea/modules/translation`
- [x] Move validation form structs from `code.gitea.io/gitea/modules/auth` to `code.gitea.io/gitea/modules/forms` to avoid dependency cycle.
- [x] Removed macaron log service because it's not need any more. **BREAK**
- [x] All form structs have to be get by `web.GetForm(ctx)` in the route function but not as a function parameter on routes definition.
- [x] Move Git HTTP protocol implementation to use routers directly.
- [x] Fix the problem that chi routes don't support trailing slash but macaron did.
- [x] `/api/v1/swagger` now will be redirect to `/api/swagger` but not render directly so that `APIContext` will not create a html render. 

Notices:
- Chi router don't support request with trailing slash
- Integration test `TestUserHeatmap` maybe mysql version related. It's failed on my macOS(mysql 5.7.29 installed via brew) but succeed on CI.

Co-authored-by: 6543 <6543@obermui.de>

12 files changed, 1032 insertions, 0 deletions

diff --git a/vendor/gitea.com/go-chi/cache/.drone.yml b/vendor/gitea.com/go-chi/cache/.drone.yml
new file mode 100644
index 0000000000..9baf4f1cf7
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/.drone.yml
@@ -0,0 +1,24 @@
+kind: pipeline
+name: go1-1-1
+
+steps:
+- name: test
+  image: golang:1.11
+  environment:
+    GOPROXY: https://goproxy.cn
+  commands:
+  - go build -v
+  - go test -v -race -coverprofile=coverage.txt -covermode=atomic
+
+---
+kind: pipeline
+name: go1-1-2
+
+steps:
+- name: test
+  image: golang:1.12
+  environment:
+    GOPROXY: https://goproxy.cn
+  commands:
+  - go build -v
+  - go test -v -race -coverprofile=coverage.txt -covermode=atomic
\ No newline at end of file
diff --git a/vendor/gitea.com/go-chi/cache/.gitignore b/vendor/gitea.com/go-chi/cache/.gitignore
new file mode 100644
index 0000000000..5c84e85ffc
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/.gitignore
@@ -0,0 +1,5 @@
+nodb/cache
+ledis/tmp.db/
+nodb/tmp.db/
+/vendor
+/.idea
diff --git a/vendor/gitea.com/go-chi/cache/LICENSE b/vendor/gitea.com/go-chi/cache/LICENSE
new file mode 100644
index 0000000000..8405e89a0b
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/LICENSE
@@ -0,0 +1,191 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+"License" shall mean the terms and conditions for use, reproduction, and
+distribution as defined by Sections 1 through 9 of this document.
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+any separate license agreement you may have executed with Licensor regarding
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+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
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+
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+
+In no event and under no legal theory, whether in tort (including negligence),
+contract, or otherwise, unless required by applicable law (such as deliberate
+and grossly negligent acts) or agreed to in writing, shall any Contributor be
+liable to You for damages, including any direct, indirect, special, incidental,
+or consequential damages of any character arising as a result of this License or
+out of the use or inability to use the Work (including but not limited to
+damages for loss of goodwill, work stoppage, computer failure or malfunction, or
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+
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+offer, and charge a fee for, acceptance of support, warranty, indemnity, or
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+agree to indemnify, defend, and hold each Contributor harmless for any liability
+incurred by, or claims asserted against, such Contributor by reason of your
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+   Copyright [yyyy] [name of copyright owner]
+
+   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.
\ No newline at end of file
diff --git a/vendor/gitea.com/go-chi/cache/README.md b/vendor/gitea.com/go-chi/cache/README.md
new file mode 100644
index 0000000000..e9eac96115
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/README.md
@@ -0,0 +1,20 @@
+# cache
+
+Middleware cache provides cache management for [Macaron](https://github.com/go-macaron/macaron). It can use many cache adapters, including memory, file, Redis, Memcache, PostgreSQL, MySQL, Ledis and Nodb.
+
+### Installation
+
+	go get gitea.com/macaron/cache
+
+## Getting Help
+
+- [API Reference](https://gowalker.org/gitea.com/macaron/cache)
+- [Documentation](http://go-macaron.com/docs/middlewares/cache)
+
+## Credits
+
+This package is a modified version of [go-macaron/cache](github.com/go-macaron/cache).
+
+## License
+
+This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.
\ No newline at end of file
diff --git a/vendor/gitea.com/go-chi/cache/cache.go b/vendor/gitea.com/go-chi/cache/cache.go
new file mode 100644
index 0000000000..79d92cc6d8
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/cache.go
@@ -0,0 +1,96 @@
+// Copyright 2013 Beego Authors
+// Copyright 2014 The Macaron Authors
+//
+// 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 cache is a middleware that provides the cache management of Macaron.
+package cache
+
+import (
+	"fmt"
+)
+
+// Cache is the interface that operates the cache data.
+type Cache interface {
+	// Put puts value into cache with key and expire time.
+	Put(key string, val interface{}, timeout int64) error
+	// Get gets cached value by given key.
+	Get(key string) interface{}
+	// Delete deletes cached value by given key.
+	Delete(key string) error
+	// Incr increases cached int-type value by given key as a counter.
+	Incr(key string) error
+	// Decr decreases cached int-type value by given key as a counter.
+	Decr(key string) error
+	// IsExist returns true if cached value exists.
+	IsExist(key string) bool
+	// Flush deletes all cached data.
+	Flush() error
+	// StartAndGC starts GC routine based on config string settings.
+	StartAndGC(opt Options) error
+}
+
+// Options represents a struct for specifying configuration options for the cache middleware.
+type Options struct {
+	// Name of adapter. Default is "memory".
+	Adapter string
+	// Adapter configuration, it's corresponding to adapter.
+	AdapterConfig string
+	// GC interval time in seconds. Default is 60.
+	Interval int
+	// Occupy entire database. Default is false.
+	OccupyMode bool
+	// Configuration section name. Default is "cache".
+	Section string
+}
+
+func prepareOptions(opt Options) Options {
+	if len(opt.Section) == 0 {
+		opt.Section = "cache"
+	}
+	if len(opt.Adapter) == 0 {
+		opt.Adapter = "memory"
+	}
+	if opt.Interval == 0 {
+		opt.Interval = 60
+	}
+	if len(opt.AdapterConfig) == 0 {
+		opt.AdapterConfig = "data/caches"
+	}
+
+	return opt
+}
+
+// NewCacher creates and returns a new cacher by given adapter name and configuration.
+// It panics when given adapter isn't registered and starts GC automatically.
+func NewCacher(opt Options) (Cache, error) {
+	opt = prepareOptions(opt)
+	adapter, ok := adapters[opt.Adapter]
+	if !ok {
+		return nil, fmt.Errorf("cache: unknown adapter '%s'(forgot to import?)", opt.Adapter)
+	}
+	return adapter, adapter.StartAndGC(opt)
+}
+
+var adapters = make(map[string]Cache)
+
+// Register registers a adapter.
+func Register(name string, adapter Cache) {
+	if adapter == nil {
+		panic("cache: cannot register adapter with nil value")
+	}
+	if _, dup := adapters[name]; dup {
+		panic(fmt.Errorf("cache: cannot register adapter '%s' twice", name))
+	}
+	adapters[name] = adapter
+}
diff --git a/vendor/gitea.com/go-chi/cache/file.go b/vendor/gitea.com/go-chi/cache/file.go
new file mode 100644
index 0000000000..d07ab0b11e
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/file.go
@@ -0,0 +1,207 @@
+// Copyright 2013 Beego Authors
+// Copyright 2014 The Macaron Authors
+//
+// 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 cache
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"github.com/unknwon/com"
+)
+
+// Item represents a cache item.
+type Item struct {
+	Val     interface{}
+	Created int64
+	Expire  int64
+}
+
+func (item *Item) hasExpired() bool {
+	return item.Expire > 0 &&
+		(time.Now().Unix()-item.Created) >= item.Expire
+}
+
+// FileCacher represents a file cache adapter implementation.
+type FileCacher struct {
+	lock     sync.Mutex
+	rootPath string
+	interval int // GC interval.
+}
+
+// NewFileCacher creates and returns a new file cacher.
+func NewFileCacher() *FileCacher {
+	return &FileCacher{}
+}
+
+func (c *FileCacher) filepath(key string) string {
+	m := md5.Sum([]byte(key))
+	hash := hex.EncodeToString(m[:])
+	return filepath.Join(c.rootPath, string(hash[0]), string(hash[1]), hash)
+}
+
+// Put puts value into cache with key and expire time.
+// If expired is 0, it will be deleted by next GC operation.
+func (c *FileCacher) Put(key string, val interface{}, expire int64) error {
+	filename := c.filepath(key)
+	item := &Item{val, time.Now().Unix(), expire}
+	data, err := EncodeGob(item)
+	if err != nil {
+		return err
+	}
+
+	os.MkdirAll(filepath.Dir(filename), os.ModePerm)
+	return ioutil.WriteFile(filename, data, os.ModePerm)
+}
+
+func (c *FileCacher) read(key string) (*Item, error) {
+	filename := c.filepath(key)
+
+	data, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	item := new(Item)
+	return item, DecodeGob(data, item)
+}
+
+// Get gets cached value by given key.
+func (c *FileCacher) Get(key string) interface{} {
+	item, err := c.read(key)
+	if err != nil {
+		return nil
+	}
+
+	if item.hasExpired() {
+		os.Remove(c.filepath(key))
+		return nil
+	}
+	return item.Val
+}
+
+// Delete deletes cached value by given key.
+func (c *FileCacher) Delete(key string) error {
+	return os.Remove(c.filepath(key))
+}
+
+// Incr increases cached int-type value by given key as a counter.
+func (c *FileCacher) Incr(key string) error {
+	item, err := c.read(key)
+	if err != nil {
+		return err
+	}
+
+	item.Val, err = Incr(item.Val)
+	if err != nil {
+		return err
+	}
+
+	return c.Put(key, item.Val, item.Expire)
+}
+
+// Decrease cached int value.
+func (c *FileCacher) Decr(key string) error {
+	item, err := c.read(key)
+	if err != nil {
+		return err
+	}
+
+	item.Val, err = Decr(item.Val)
+	if err != nil {
+		return err
+	}
+
+	return c.Put(key, item.Val, item.Expire)
+}
+
+// IsExist returns true if cached value exists.
+func (c *FileCacher) IsExist(key string) bool {
+	return com.IsExist(c.filepath(key))
+}
+
+// Flush deletes all cached data.
+func (c *FileCacher) Flush() error {
+	return os.RemoveAll(c.rootPath)
+}
+
+func (c *FileCacher) startGC() {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	if c.interval < 1 {
+		return
+	}
+
+	if err := filepath.Walk(c.rootPath, func(path string, fi os.FileInfo, err error) error {
+		if err != nil {
+			return fmt.Errorf("Walk: %v", err)
+		}
+
+		if fi.IsDir() {
+			return nil
+		}
+
+		data, err := ioutil.ReadFile(path)
+		if err != nil && !os.IsNotExist(err) {
+			fmt.Errorf("ReadFile: %v", err)
+		}
+
+		item := new(Item)
+		if err = DecodeGob(data, item); err != nil {
+			return err
+		}
+		if item.hasExpired() {
+			if err = os.Remove(path); err != nil && !os.IsNotExist(err) {
+				return fmt.Errorf("Remove: %v", err)
+			}
+		}
+		return nil
+	}); err != nil {
+		log.Printf("error garbage collecting cache files: %v", err)
+	}
+
+	time.AfterFunc(time.Duration(c.interval)*time.Second, func() { c.startGC() })
+}
+
+// StartAndGC starts GC routine based on config string settings.
+func (c *FileCacher) StartAndGC(opt Options) error {
+	c.lock.Lock()
+	c.rootPath = opt.AdapterConfig
+	c.interval = opt.Interval
+
+	if !filepath.IsAbs(c.rootPath) {
+		panic("rootPath must be an absolute path")
+	}
+	c.lock.Unlock()
+
+	if err := os.MkdirAll(c.rootPath, os.ModePerm); err != nil {
+		return err
+	}
+
+	go c.startGC()
+	return nil
+}
+
+func init() {
+	Register("file", NewFileCacher())
+}
diff --git a/vendor/gitea.com/go-chi/cache/go.mod b/vendor/gitea.com/go-chi/cache/go.mod
new file mode 100644
index 0000000000..3609e210bd
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/go.mod
@@ -0,0 +1,32 @@
+module gitea.com/go-chi/cache
+
+go 1.11
+
+require (
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668
+	github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76 // indirect
+	github.com/edsrzf/mmap-go v1.0.0 // indirect
+	github.com/go-redis/redis v6.15.2+incompatible
+	github.com/go-sql-driver/mysql v1.4.1
+	github.com/golang/snappy v0.0.2 // indirect
+	github.com/lib/pq v1.2.0
+	github.com/lunny/log v0.0.0-20160921050905-7887c61bf0de // indirect
+	github.com/lunny/nodb v0.0.0-20160621015157-fc1ef06ad4af
+	github.com/mattn/go-sqlite3 v1.11.0 // indirect
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
+	github.com/pelletier/go-toml v1.8.1 // indirect
+	github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726 // indirect
+	github.com/siddontang/go-snappy v0.0.0-20140704025258-d8f7bb82a96d // indirect
+	github.com/siddontang/ledisdb v0.0.0-20190202134119-8ceb77e66a92
+	github.com/siddontang/rdb v0.0.0-20150307021120-fc89ed2e418d // indirect
+	github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337
+	github.com/syndtr/goleveldb v1.0.0 // indirect
+	github.com/unknwon/com v0.0.0-20190804042917-757f69c95f3e
+	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 // indirect
+	golang.org/x/sys v0.0.0-20190730183949-1393eb018365 // indirect
+	google.golang.org/appengine v1.6.1 // indirect
+	gopkg.in/ini.v1 v1.44.2
+	gopkg.in/yaml.v2 v2.2.2 // indirect
+)
diff --git a/vendor/gitea.com/go-chi/cache/go.sum b/vendor/gitea.com/go-chi/cache/go.sum
new file mode 100644
index 0000000000..8ed30d7a7a
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/go.sum
@@ -0,0 +1,101 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668 h1:U/lr3Dgy4WK+hNk4tyD+nuGjpVLPEHuJSFXMw11/HPA=
+github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
+github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76 h1:Lgdd/Qp96Qj8jqLpq2cI1I1X7BJnu06efS+XkhRoLUQ=
+github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76/go.mod h1:vYwsqCOLxGiisLwp9rITslkFNpZD5rz43tf41QFkTWY=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/edsrzf/mmap-go v1.0.0 h1:CEBF7HpRnUCSJgGUb5h1Gm7e3VkmVDrR8lvWVLtrOFw=
+github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
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+github.com/go-redis/redis v6.15.2+incompatible h1:9SpNVG76gr6InJGxoZ6IuuxaCOQwDAhzyXg+Bs+0Sb4=
+github.com/go-redis/redis v6.15.2+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
+github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
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+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
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+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/ini.v1 v1.44.2 h1:N6kNUPqiIyxP+s/aINPzRvNpcTVV30qLC0t6ZjZFlUU=
+gopkg.in/ini.v1 v1.44.2/go.mod h1:M3Cogqpuv0QCi3ExAY5V4uOt4qb/R3xZubo9m8lK5wg=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/vendor/gitea.com/go-chi/cache/memcache/memcache.go b/vendor/gitea.com/go-chi/cache/memcache/memcache.go
new file mode 100644
index 0000000000..400a774569
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/memcache/memcache.go
@@ -0,0 +1,92 @@
+// Copyright 2013 Beego Authors
+// Copyright 2014 The Macaron Authors
+//
+// 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 cache
+
+import (
+	"strings"
+
+	"github.com/bradfitz/gomemcache/memcache"
+	"github.com/unknwon/com"
+
+	"gitea.com/go-chi/cache"
+)
+
+// MemcacheCacher represents a memcache cache adapter implementation.
+type MemcacheCacher struct {
+	c *memcache.Client
+}
+
+func NewItem(key string, data []byte, expire int32) *memcache.Item {
+	return &memcache.Item{
+		Key:        key,
+		Value:      data,
+		Expiration: expire,
+	}
+}
+
+// Put puts value into cache with key and expire time.
+// If expired is 0, it lives forever.
+func (c *MemcacheCacher) Put(key string, val interface{}, expire int64) error {
+	return c.c.Set(NewItem(key, []byte(com.ToStr(val)), int32(expire)))
+}
+
+// Get gets cached value by given key.
+func (c *MemcacheCacher) Get(key string) interface{} {
+	item, err := c.c.Get(key)
+	if err != nil {
+		return nil
+	}
+	return string(item.Value)
+}
+
+// Delete deletes cached value by given key.
+func (c *MemcacheCacher) Delete(key string) error {
+	return c.c.Delete(key)
+}
+
+// Incr increases cached int-type value by given key as a counter.
+func (c *MemcacheCacher) Incr(key string) error {
+	_, err := c.c.Increment(key, 1)
+	return err
+}
+
+// Decr decreases cached int-type value by given key as a counter.
+func (c *MemcacheCacher) Decr(key string) error {
+	_, err := c.c.Decrement(key, 1)
+	return err
+}
+
+// IsExist returns true if cached value exists.
+func (c *MemcacheCacher) IsExist(key string) bool {
+	_, err := c.c.Get(key)
+	return err == nil
+}
+
+// Flush deletes all cached data.
+func (c *MemcacheCacher) Flush() error {
+	return c.c.FlushAll()
+}
+
+// StartAndGC starts GC routine based on config string settings.
+// AdapterConfig: 127.0.0.1:9090;127.0.0.1:9091
+func (c *MemcacheCacher) StartAndGC(opt cache.Options) error {
+	c.c = memcache.New(strings.Split(opt.AdapterConfig, ";")...)
+	return nil
+}
+
+func init() {
+	cache.Register("memcache", &MemcacheCacher{})
+}
diff --git a/vendor/gitea.com/go-chi/cache/memcache/memcache.goconvey b/vendor/gitea.com/go-chi/cache/memcache/memcache.goconvey
new file mode 100644
index 0000000000..8485e986e4
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/memcache/memcache.goconvey
@@ -0,0 +1 @@
+ignore
\ No newline at end of file
diff --git a/vendor/gitea.com/go-chi/cache/memory.go b/vendor/gitea.com/go-chi/cache/memory.go
new file mode 100644
index 0000000000..2d5a8fac4d
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/memory.go
@@ -0,0 +1,179 @@
+// Copyright 2013 Beego Authors
+// Copyright 2014 The Macaron Authors
+//
+// 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 cache
+
+import (
+	"errors"
+	"sync"
+	"time"
+)
+
+// MemoryItem represents a memory cache item.
+type MemoryItem struct {
+	val     interface{}
+	created int64
+	expire  int64
+}
+
+func (item *MemoryItem) hasExpired() bool {
+	return item.expire > 0 &&
+		(time.Now().Unix()-item.created) >= item.expire
+}
+
+// MemoryCacher represents a memory cache adapter implementation.
+type MemoryCacher struct {
+	lock     sync.RWMutex
+	items    map[string]*MemoryItem
+	interval int // GC interval.
+}
+
+// NewMemoryCacher creates and returns a new memory cacher.
+func NewMemoryCacher() *MemoryCacher {
+	return &MemoryCacher{items: make(map[string]*MemoryItem)}
+}
+
+// Put puts value into cache with key and expire time.
+// If expired is 0, it will be deleted by next GC operation.
+func (c *MemoryCacher) Put(key string, val interface{}, expire int64) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	c.items[key] = &MemoryItem{
+		val:     val,
+		created: time.Now().Unix(),
+		expire:  expire,
+	}
+	return nil
+}
+
+// Get gets cached value by given key.
+func (c *MemoryCacher) Get(key string) interface{} {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	item, ok := c.items[key]
+	if !ok {
+		return nil
+	}
+	if item.hasExpired() {
+		go c.Delete(key)
+		return nil
+	}
+	return item.val
+}
+
+// Delete deletes cached value by given key.
+func (c *MemoryCacher) Delete(key string) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	delete(c.items, key)
+	return nil
+}
+
+// Incr increases cached int-type value by given key as a counter.
+func (c *MemoryCacher) Incr(key string) (err error) {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	item, ok := c.items[key]
+	if !ok {
+		return errors.New("key not exist")
+	}
+	item.val, err = Incr(item.val)
+	return err
+}
+
+// Decr decreases cached int-type value by given key as a counter.
+func (c *MemoryCacher) Decr(key string) (err error) {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	item, ok := c.items[key]
+	if !ok {
+		return errors.New("key not exist")
+	}
+
+	item.val, err = Decr(item.val)
+	return err
+}
+
+// IsExist returns true if cached value exists.
+func (c *MemoryCacher) IsExist(key string) bool {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	_, ok := c.items[key]
+	return ok
+}
+
+// Flush deletes all cached data.
+func (c *MemoryCacher) Flush() error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	c.items = make(map[string]*MemoryItem)
+	return nil
+}
+
+func (c *MemoryCacher) checkRawExpiration(key string) {
+	item, ok := c.items[key]
+	if !ok {
+		return
+	}
+
+	if item.hasExpired() {
+		delete(c.items, key)
+	}
+}
+
+func (c *MemoryCacher) checkExpiration(key string) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	c.checkRawExpiration(key)
+}
+
+func (c *MemoryCacher) startGC() {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	if c.interval < 1 {
+		return
+	}
+
+	if c.items != nil {
+		for key, _ := range c.items {
+			c.checkRawExpiration(key)
+		}
+	}
+
+	time.AfterFunc(time.Duration(c.interval)*time.Second, func() { c.startGC() })
+}
+
+// StartAndGC starts GC routine based on config string settings.
+func (c *MemoryCacher) StartAndGC(opt Options) error {
+	c.lock.Lock()
+	c.interval = opt.Interval
+	c.lock.Unlock()
+
+	go c.startGC()
+	return nil
+}
+
+func init() {
+	Register("memory", NewMemoryCacher())
+}
diff --git a/vendor/gitea.com/go-chi/cache/utils.go b/vendor/gitea.com/go-chi/cache/utils.go
new file mode 100644
index 0000000000..734fb6f40e
--- /dev/null
+++ b/vendor/gitea.com/go-chi/cache/utils.go
@@ -0,0 +1,84 @@
+// Copyright 2014 The Macaron Authors
+//
+// 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 cache
+
+import (
+	"bytes"
+	"encoding/gob"
+	"errors"
+)
+
+func EncodeGob(item *Item) ([]byte, error) {
+	buf := bytes.NewBuffer(nil)
+	err := gob.NewEncoder(buf).Encode(item)
+	return buf.Bytes(), err
+}
+
+func DecodeGob(data []byte, out *Item) error {
+	buf := bytes.NewBuffer(data)
+	return gob.NewDecoder(buf).Decode(&out)
+}
+
+func Incr(val interface{}) (interface{}, error) {
+	switch val.(type) {
+	case int:
+		val = val.(int) + 1
+	case int32:
+		val = val.(int32) + 1
+	case int64:
+		val = val.(int64) + 1
+	case uint:
+		val = val.(uint) + 1
+	case uint32:
+		val = val.(uint32) + 1
+	case uint64:
+		val = val.(uint64) + 1
+	default:
+		return val, errors.New("item value is not int-type")
+	}
+	return val, nil
+}
+
+func Decr(val interface{}) (interface{}, error) {
+	switch val.(type) {
+	case int:
+		val = val.(int) - 1
+	case int32:
+		val = val.(int32) - 1
+	case int64:
+		val = val.(int64) - 1
+	case uint:
+		if val.(uint) > 0 {
+			val = val.(uint) - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	case uint32:
+		if val.(uint32) > 0 {
+			val = val.(uint32) - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	case uint64:
+		if val.(uint64) > 0 {
+			val = val.(uint64) - 1
+		} else {
+			return val, errors.New("item value is less than 0")
+		}
+	default:
+		return val, errors.New("item value is not int-type")
+	}
+	return val, nil
+}