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>

routers/api/v1/misc/markdown.go

@@ -5,6 +5,7 @@
 package misc
 
 import (
+	"io/ioutil"
 	"net/http"
 	"strings"
 
@@ -13,12 +14,13 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/web"
 
 	"mvdan.cc/xurls/v2"
 )
 
 // Markdown render markdown document to HTML
-func Markdown(ctx *context.APIContext, form api.MarkdownOption) {
+func Markdown(ctx *context.APIContext) {
 	// swagger:operation POST /markdown miscellaneous renderMarkdown
 	// ---
 	// summary: Render a markdown document as HTML
@@ -37,6 +39,8 @@ func Markdown(ctx *context.APIContext, form api.MarkdownOption) {
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
+	form := web.GetForm(ctx).(*api.MarkdownOption)
+
 	if ctx.HasAPIError() {
 		ctx.Error(http.StatusUnprocessableEntity, "", ctx.GetErrMsg())
 		return
@@ -117,7 +121,7 @@ func MarkdownRaw(ctx *context.APIContext) {
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
-	body, err := ctx.Req.Body().Bytes()
+	body, err := ioutil.ReadAll(ctx.Req.Body)
 	if err != nil {
 		ctx.Error(http.StatusUnprocessableEntity, "", err)
 		return

routers/api/v1/misc/markdown_test.go

@@ -15,10 +15,10 @@ import (
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/web"
 
-	"gitea.com/macaron/inject"
-	"gitea.com/macaron/macaron"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -26,25 +26,21 @@ const AppURL = "http://localhost:3000/"
 const Repo = "gogits/gogs"
 const AppSubURL = AppURL + Repo + "/"
 
-func createContext(req *http.Request) (*macaron.Context, *httptest.ResponseRecorder) {
+func createContext(req *http.Request) (*context.Context, *httptest.ResponseRecorder) {
+	var rnd = templates.HTMLRenderer()
 	resp := httptest.NewRecorder()
-	c := &macaron.Context{
-		Injector: inject.New(),
-		Req:      macaron.Request{Request: req},
-		Resp:     macaron.NewResponseWriter(req.Method, resp),
-		Render:   &macaron.DummyRender{ResponseWriter: resp},
-		Data:     make(map[string]interface{}),
+	c := &context.Context{
+		Req:    req,
+		Resp:   context.NewResponse(resp),
+		Render: rnd,
+		Data:   make(map[string]interface{}),
 	}
-	c.Map(c)
-	c.Map(req)
 	return c, resp
 }
 
-func wrap(ctx *macaron.Context) *context.APIContext {
+func wrap(ctx *context.Context) *context.APIContext {
 	return &context.APIContext{
-		Context: &context.Context{
-			Context: ctx,
-		},
+		Context: ctx,
 	}
 }
 
@@ -115,7 +111,8 @@ Here are some links to the most important topics. You can find the full list of
 
 	for i := 0; i < len(testCases); i += 2 {
 		options.Text = testCases[i]
-		Markdown(ctx, options)
+		web.SetForm(ctx, &options)
+		Markdown(ctx)
 		assert.Equal(t, testCases[i+1], resp.Body.String())
 		resp.Body.Reset()
 	}
@@ -156,7 +153,8 @@ func TestAPI_RenderSimple(t *testing.T) {
 
 	for i := 0; i < len(simpleCases); i += 2 {
 		options.Text = simpleCases[i]
-		Markdown(ctx, options)
+		web.SetForm(ctx, &options)
+		Markdown(ctx)
 		assert.Equal(t, simpleCases[i+1], resp.Body.String())
 		resp.Body.Reset()
 	}
@@ -174,7 +172,7 @@ func TestAPI_RenderRaw(t *testing.T) {
 	ctx := wrap(m)
 
 	for i := 0; i < len(simpleCases); i += 2 {
-		ctx.Req.Request.Body = ioutil.NopCloser(strings.NewReader(simpleCases[i]))
+		ctx.Req.Body = ioutil.NopCloser(strings.NewReader(simpleCases[i]))
 		MarkdownRaw(ctx)
 		assert.Equal(t, simpleCases[i+1], resp.Body.String())
 		resp.Body.Reset()