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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package common
import (
"fmt"
"net/http"
"strings"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/web/middleware"
"code.gitea.io/gitea/modules/web/routing"
"code.gitea.io/gitea/services/context"
"code.forgejo.org/go-chi/session"
"github.com/chi-middleware/proxy"
chi "github.com/go-chi/chi/v5"
)
// ProtocolMiddlewares returns HTTP protocol related middlewares, and it provides a global panic recovery
func ProtocolMiddlewares() (handlers []any) {
// first, normalize the URL path
handlers = append(handlers, stripSlashesMiddleware)
// prepare the ContextData and panic recovery
handlers = append(handlers, func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
defer func() {
if err := recover(); err != nil {
RenderPanicErrorPage(resp, req, err) // it should never panic
}
}()
req = req.WithContext(middleware.WithContextData(req.Context()))
next.ServeHTTP(resp, req)
})
})
// wrap the request and response, use the process context and add it to the process manager
handlers = append(handlers, func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
ctx, _, finished := process.GetManager().AddTypedContext(req.Context(), fmt.Sprintf("%s: %s", req.Method, req.RequestURI), process.RequestProcessType, true)
defer finished()
next.ServeHTTP(context.WrapResponseWriter(resp), req.WithContext(cache.WithCacheContext(ctx)))
})
})
if setting.ReverseProxyLimit > 0 {
opt := proxy.NewForwardedHeadersOptions().
WithForwardLimit(setting.ReverseProxyLimit).
ClearTrustedProxies()
for _, n := range setting.ReverseProxyTrustedProxies {
if !strings.Contains(n, "/") {
opt.AddTrustedProxy(n)
} else {
opt.AddTrustedNetwork(n)
}
}
handlers = append(handlers, proxy.ForwardedHeaders(opt))
}
if setting.IsRouteLogEnabled() {
handlers = append(handlers, routing.NewLoggerHandler())
}
if setting.IsAccessLogEnabled() {
handlers = append(handlers, context.AccessLogger())
}
return handlers
}
func stripSlashesMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
// First of all escape the URL RawPath to ensure that all routing is done using a correctly escaped URL
req.URL.RawPath = req.URL.EscapedPath()
urlPath := req.URL.RawPath
rctx := chi.RouteContext(req.Context())
if rctx != nil && rctx.RoutePath != "" {
urlPath = rctx.RoutePath
}
sanitizedPath := &strings.Builder{}
prevWasSlash := false
for _, chr := range strings.TrimRight(urlPath, "/") {
if chr != '/' || !prevWasSlash {
sanitizedPath.WriteRune(chr)
}
prevWasSlash = chr == '/'
}
if rctx == nil {
req.URL.Path = sanitizedPath.String()
} else {
rctx.RoutePath = sanitizedPath.String()
}
next.ServeHTTP(resp, req)
})
}
func Sessioner() func(next http.Handler) http.Handler {
return session.Sessioner(session.Options{
Provider: setting.SessionConfig.Provider,
ProviderConfig: setting.SessionConfig.ProviderConfig,
CookieName: setting.SessionConfig.CookieName,
CookiePath: setting.SessionConfig.CookiePath,
Gclifetime: setting.SessionConfig.Gclifetime,
Maxlifetime: setting.SessionConfig.Maxlifetime,
Secure: setting.SessionConfig.Secure,
SameSite: setting.SessionConfig.SameSite,
Domain: setting.SessionConfig.Domain,
})
}
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