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>

modules/context/xsrf_test.go

@@ -0,0 +1,90 @@
+// Copyright 2012 Google Inc. All Rights Reserved.
+// Copyright 2014 The Macaron Authors
+// Copyright 2020 The Gitea 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 context
+
+import (
+	"encoding/base64"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	key      = "quay"
+	userID   = "12345678"
+	actionID = "POST /form"
+)
+
+var (
+	now              = time.Now()
+	oneMinuteFromNow = now.Add(1 * time.Minute)
+)
+
+func Test_ValidToken(t *testing.T) {
+	t.Run("Validate token", func(t *testing.T) {
+		tok := generateTokenAtTime(key, userID, actionID, now)
+		assert.True(t, validTokenAtTime(tok, key, userID, actionID, oneMinuteFromNow))
+		assert.True(t, validTokenAtTime(tok, key, userID, actionID, now.Add(Timeout-1*time.Nanosecond)))
+		assert.True(t, validTokenAtTime(tok, key, userID, actionID, now.Add(-1*time.Minute)))
+	})
+}
+
+// Test_SeparatorReplacement tests that separators are being correctly substituted
+func Test_SeparatorReplacement(t *testing.T) {
+	t.Run("Test two separator replacements", func(t *testing.T) {
+		assert.NotEqual(t, generateTokenAtTime("foo:bar", "baz", "wah", now),
+			generateTokenAtTime("foo", "bar:baz", "wah", now))
+	})
+}
+
+func Test_InvalidToken(t *testing.T) {
+	t.Run("Test invalid tokens", func(t *testing.T) {
+		invalidTokenTests := []struct {
+			name, key, userID, actionID string
+			t                           time.Time
+		}{
+			{"Bad key", "foobar", userID, actionID, oneMinuteFromNow},
+			{"Bad userID", key, "foobar", actionID, oneMinuteFromNow},
+			{"Bad actionID", key, userID, "foobar", oneMinuteFromNow},
+			{"Expired", key, userID, actionID, now.Add(Timeout)},
+			{"More than 1 minute from the future", key, userID, actionID, now.Add(-1*time.Nanosecond - 1*time.Minute)},
+		}
+
+		tok := generateTokenAtTime(key, userID, actionID, now)
+		for _, itt := range invalidTokenTests {
+			assert.False(t, validTokenAtTime(tok, itt.key, itt.userID, itt.actionID, itt.t))
+		}
+	})
+}
+
+// Test_ValidateBadData primarily tests that no unexpected panics are triggered during parsing
+func Test_ValidateBadData(t *testing.T) {
+	t.Run("Validate bad data", func(t *testing.T) {
+		badDataTests := []struct {
+			name, tok string
+		}{
+			{"Invalid Base64", "ASDab24(@)$*=="},
+			{"No delimiter", base64.URLEncoding.EncodeToString([]byte("foobar12345678"))},
+			{"Invalid time", base64.URLEncoding.EncodeToString([]byte("foobar:foobar"))},
+		}
+
+		for _, bdt := range badDataTests {
+			assert.False(t, validTokenAtTime(bdt.tok, key, userID, actionID, oneMinuteFromNow))
+		}
+	})
+}