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// 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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"fmt"
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"html"
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"net/http"
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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/web"
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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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)
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Refactor web route (#24080)
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
2 years ago
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// Routes registers the installation routes
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func Routes() *web.Route {
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base := web.NewRoute()
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base.Use(common.ProtocolMiddlewares()...)
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base.Methods("GET, HEAD", "/assets/*", public.FileHandlerFunc())
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r := web.NewRoute()
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r.Use(common.Sessioner(), Contexter())
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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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Refactor web route (#24080)
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
2 years ago
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r.NotFound(installNotFound)
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base.Mount("", r)
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return base
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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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