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The old code is unnecessarily complex, and has many misuses. Old code "wraps" a lot, wrap wrap wrap, it's difficult to understand which kind of handler is used. The new code uses a general approach, we do not need to write all kinds of handlers into the "wrapper", do not need to wrap them again and again. New code, there are only 2 concepts: 1. HandlerProvider: `func (h any) (handlerProvider func (next) http.Handler)`, it can be used as middleware 2. Use HandlerProvider to get the final HandlerFunc, and use it for `r.Get()` And we can decouple the route package from context package (see the TODO). # FAQ ## Is `reflect` safe? Yes, all handlers are checked during startup, see the `preCheckHandler` comment. If any handler is wrong, developers could know it in the first time. ## Does `reflect` affect performance? No. https://github.com/go-gitea/gitea/pull/24080#discussion_r1164825901 1. This reflect code only runs for each web handler call, handler is far more slower: 10ms-50ms 2. The reflect is pretty fast (comparing to other code): 0.000265ms 3. XORM has more reflect operations already
124 lines
4.0 KiB
Go
124 lines
4.0 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package install
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import (
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goctx "context"
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"fmt"
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"html"
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"net/http"
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"code.gitea.io/gitea/modules/httpcache"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/public"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/templates"
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"code.gitea.io/gitea/modules/web"
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"code.gitea.io/gitea/modules/web/middleware"
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"code.gitea.io/gitea/routers/common"
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"code.gitea.io/gitea/routers/web/healthcheck"
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"code.gitea.io/gitea/services/forms"
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"gitea.com/go-chi/session"
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)
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type dataStore map[string]interface{}
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func (d *dataStore) GetData() map[string]interface{} {
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return *d
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}
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func installRecovery(ctx goctx.Context) func(next http.Handler) http.Handler {
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_, rnd := templates.HTMLRenderer(ctx)
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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defer func() {
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// Why we need this? The first recover will try to render a beautiful
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// error page for user, but the process can still panic again, then
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// we have to just recover twice and send a simple error page that
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// should not panic anymore.
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defer func() {
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if err := recover(); err != nil {
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combinedErr := fmt.Sprintf("PANIC: %v\n%s", err, log.Stack(2))
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log.Error("%s", combinedErr)
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if setting.IsProd {
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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} else {
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http.Error(w, combinedErr, http.StatusInternalServerError)
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}
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}
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}()
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if err := recover(); err != nil {
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combinedErr := fmt.Sprintf("PANIC: %v\n%s", err, log.Stack(2))
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log.Error("%s", combinedErr)
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lc := middleware.Locale(w, req)
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store := dataStore{
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"Language": lc.Language(),
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"CurrentURL": setting.AppSubURL + req.URL.RequestURI(),
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"locale": lc,
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"SignedUserID": int64(0),
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"SignedUserName": "",
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}
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httpcache.SetCacheControlInHeader(w.Header(), 0, "no-transform")
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w.Header().Set(`X-Frame-Options`, setting.CORSConfig.XFrameOptions)
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if !setting.IsProd {
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store["ErrorMsg"] = combinedErr
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}
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err = rnd.HTML(w, http.StatusInternalServerError, "status/500", templates.BaseVars().Merge(store))
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if err != nil {
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log.Error("%v", err)
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}
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}
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}()
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next.ServeHTTP(w, req)
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})
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}
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}
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// Routes registers the installation routes
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func Routes(ctx goctx.Context) *web.Route {
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r := web.NewRoute()
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for _, middle := range common.Middlewares() {
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r.Use(middle)
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}
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r.Use(web.MiddlewareWithPrefix("/assets/", nil, public.AssetsHandlerFunc("/assets/")))
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r.Use(session.Sessioner(session.Options{
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Provider: setting.SessionConfig.Provider,
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ProviderConfig: setting.SessionConfig.ProviderConfig,
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CookieName: setting.SessionConfig.CookieName,
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CookiePath: setting.SessionConfig.CookiePath,
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Gclifetime: setting.SessionConfig.Gclifetime,
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Maxlifetime: setting.SessionConfig.Maxlifetime,
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Secure: setting.SessionConfig.Secure,
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SameSite: setting.SessionConfig.SameSite,
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Domain: setting.SessionConfig.Domain,
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}))
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r.Use(installRecovery(ctx))
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r.Use(Init(ctx))
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r.Get("/", Install) // it must be on the root, because the "install.js" use the window.location to replace the "localhost" AppURL
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r.Post("/", web.Bind(forms.InstallForm{}), SubmitInstall)
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r.Get("/post-install", InstallDone)
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r.Get("/api/healthz", healthcheck.Check)
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r.NotFound(installNotFound)
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return r
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}
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func installNotFound(w http.ResponseWriter, req *http.Request) {
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w.Header().Add("Content-Type", "text/html; charset=utf-8")
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w.Header().Add("Refresh", fmt.Sprintf("1; url=%s", setting.AppSubURL+"/"))
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// do not use 30x status, because the "post-install" page needs to use 404/200 to detect if Gitea has been installed.
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// the fetch API could follow 30x requests to the page with 200 status.
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w.WriteHeader(http.StatusNotFound)
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_, _ = fmt.Fprintf(w, `Not Found. <a href="%s">Go to default page</a>.`, html.EscapeString(setting.AppSubURL+"/"))
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}
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