mirror of
https://codeberg.org/forgejo/forgejo.git
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412e5c0946
The web context (modules/context.Context) is quite complex, it's difficult for the callers to initialize correctly. This PR introduces a `NewWebContext` function, to make sure the web context have the same behavior for different cases.
259 lines
8.6 KiB
Go
259 lines
8.6 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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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 context
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import (
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"context"
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"html"
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"html/template"
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"io"
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"net/http"
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"net/url"
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"strings"
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"time"
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"code.gitea.io/gitea/models/unit"
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user_model "code.gitea.io/gitea/models/user"
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mc "code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/httpcache"
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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/translation"
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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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web_types "code.gitea.io/gitea/modules/web/types"
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"gitea.com/go-chi/cache"
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"gitea.com/go-chi/session"
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)
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// Render represents a template render
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type Render interface {
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TemplateLookup(tmpl string, templateCtx context.Context) (templates.TemplateExecutor, error)
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HTML(w io.Writer, status int, name string, data any, templateCtx context.Context) error
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}
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// Context represents context of a request.
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type Context struct {
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*Base
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TemplateContext TemplateContext
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Render Render
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PageData map[string]any // data used by JavaScript modules in one page, it's `window.config.pageData`
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Cache cache.Cache
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Csrf CSRFProtector
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Flash *middleware.Flash
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Session session.Store
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Link string // current request URL (without query string)
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Doer *user_model.User // current signed-in user
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IsSigned bool
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IsBasicAuth bool
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ContextUser *user_model.User // the user which is being visited, in most cases it differs from Doer
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Repo *Repository
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Org *Organization
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Package *Package
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}
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type TemplateContext map[string]any
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func init() {
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web.RegisterResponseStatusProvider[*Context](func(req *http.Request) web_types.ResponseStatusProvider {
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return req.Context().Value(WebContextKey).(*Context)
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})
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}
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// TrHTMLEscapeArgs runs ".Locale.Tr()" but pre-escapes all arguments with html.EscapeString.
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// This is useful if the locale message is intended to only produce HTML content.
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func (ctx *Context) TrHTMLEscapeArgs(msg string, args ...string) string {
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trArgs := make([]any, len(args))
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for i, arg := range args {
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trArgs[i] = html.EscapeString(arg)
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}
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return ctx.Locale.Tr(msg, trArgs...)
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}
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type webContextKeyType struct{}
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var WebContextKey = webContextKeyType{}
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func GetWebContext(req *http.Request) *Context {
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ctx, _ := req.Context().Value(WebContextKey).(*Context)
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return ctx
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}
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// ValidateContext is a special context for form validation middleware. It may be different from other contexts.
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type ValidateContext struct {
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*Base
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}
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// GetValidateContext gets a context for middleware form validation
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func GetValidateContext(req *http.Request) (ctx *ValidateContext) {
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if ctxAPI, ok := req.Context().Value(apiContextKey).(*APIContext); ok {
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ctx = &ValidateContext{Base: ctxAPI.Base}
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} else if ctxWeb, ok := req.Context().Value(WebContextKey).(*Context); ok {
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ctx = &ValidateContext{Base: ctxWeb.Base}
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} else {
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panic("invalid context, expect either APIContext or Context")
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}
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return ctx
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}
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func NewTemplateContextForWeb(ctx *Context) TemplateContext {
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tmplCtx := NewTemplateContext(ctx)
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tmplCtx["Locale"] = ctx.Base.Locale
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tmplCtx["AvatarUtils"] = templates.NewAvatarUtils(ctx)
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return tmplCtx
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}
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func NewWebContext(base *Base, render Render, session session.Store) *Context {
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ctx := &Context{
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Base: base,
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Render: render,
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Session: session,
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Cache: mc.GetCache(),
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Link: setting.AppSubURL + strings.TrimSuffix(base.Req.URL.EscapedPath(), "/"),
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Repo: &Repository{PullRequest: &PullRequest{}},
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Org: &Organization{},
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}
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ctx.TemplateContext = NewTemplateContextForWeb(ctx)
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ctx.Flash = &middleware.Flash{DataStore: ctx, Values: url.Values{}}
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return ctx
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}
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// Contexter initializes a classic context for a request.
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func Contexter() func(next http.Handler) http.Handler {
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rnd := templates.HTMLRenderer()
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csrfOpts := CsrfOptions{
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Secret: setting.SecretKey,
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Cookie: setting.CSRFCookieName,
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SetCookie: true,
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Secure: setting.SessionConfig.Secure,
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CookieHTTPOnly: setting.CSRFCookieHTTPOnly,
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Header: "X-Csrf-Token",
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CookieDomain: setting.SessionConfig.Domain,
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CookiePath: setting.SessionConfig.CookiePath,
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SameSite: setting.SessionConfig.SameSite,
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}
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if !setting.IsProd {
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CsrfTokenRegenerationInterval = 5 * time.Second // in dev, re-generate the tokens more aggressively for debug purpose
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}
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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base, baseCleanUp := NewBaseContext(resp, req)
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defer baseCleanUp()
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ctx := NewWebContext(base, rnd, session.GetSession(req))
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ctx.Data.MergeFrom(middleware.CommonTemplateContextData())
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ctx.Data["Context"] = ctx // TODO: use "ctx" in template and remove this
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ctx.Data["CurrentURL"] = setting.AppSubURL + req.URL.RequestURI()
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ctx.Data["Link"] = ctx.Link
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ctx.Data["locale"] = ctx.Locale
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// PageData is passed by reference, and it will be rendered to `window.config.pageData` in `head.tmpl` for JavaScript modules
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ctx.PageData = map[string]any{}
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ctx.Data["PageData"] = ctx.PageData
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ctx.Base.AppendContextValue(WebContextKey, ctx)
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ctx.Base.AppendContextValueFunc(git.RepositoryContextKey, func() any { return ctx.Repo.GitRepo })
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ctx.Csrf = PrepareCSRFProtector(csrfOpts, ctx)
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// Get the last flash message from cookie
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lastFlashCookie := middleware.GetSiteCookie(ctx.Req, CookieNameFlash)
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if vals, _ := url.ParseQuery(lastFlashCookie); len(vals) > 0 {
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// store last Flash message into the template data, to render it
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ctx.Data["Flash"] = &middleware.Flash{
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DataStore: ctx,
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Values: vals,
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ErrorMsg: vals.Get("error"),
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SuccessMsg: vals.Get("success"),
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InfoMsg: vals.Get("info"),
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WarningMsg: vals.Get("warning"),
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}
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}
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// if there are new messages in the ctx.Flash, write them into cookie
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ctx.Resp.Before(func(resp ResponseWriter) {
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if val := ctx.Flash.Encode(); val != "" {
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middleware.SetSiteCookie(ctx.Resp, CookieNameFlash, val, 0)
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} else if lastFlashCookie != "" {
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middleware.SetSiteCookie(ctx.Resp, CookieNameFlash, "", -1)
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}
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})
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// If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid.
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if ctx.Req.Method == "POST" && strings.Contains(ctx.Req.Header.Get("Content-Type"), "multipart/form-data") {
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if err := ctx.Req.ParseMultipartForm(setting.Attachment.MaxSize << 20); err != nil && !strings.Contains(err.Error(), "EOF") { // 32MB max size
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ctx.ServerError("ParseMultipartForm", err)
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return
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}
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}
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httpcache.SetCacheControlInHeader(ctx.Resp.Header(), 0, "no-transform")
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ctx.Resp.Header().Set(`X-Frame-Options`, setting.CORSConfig.XFrameOptions)
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ctx.Data["CsrfToken"] = ctx.Csrf.GetToken()
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ctx.Data["CsrfTokenHtml"] = template.HTML(`<input type="hidden" name="_csrf" value="` + ctx.Data["CsrfToken"].(string) + `">`)
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// FIXME: do we really always need these setting? There should be someway to have to avoid having to always set these
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ctx.Data["DisableMigrations"] = setting.Repository.DisableMigrations
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ctx.Data["DisableStars"] = setting.Repository.DisableStars
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ctx.Data["EnableActions"] = setting.Actions.Enabled
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ctx.Data["ManifestData"] = setting.ManifestData
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ctx.Data["UnitWikiGlobalDisabled"] = unit.TypeWiki.UnitGlobalDisabled()
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ctx.Data["UnitIssuesGlobalDisabled"] = unit.TypeIssues.UnitGlobalDisabled()
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ctx.Data["UnitPullsGlobalDisabled"] = unit.TypePullRequests.UnitGlobalDisabled()
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ctx.Data["UnitProjectsGlobalDisabled"] = unit.TypeProjects.UnitGlobalDisabled()
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ctx.Data["UnitActionsGlobalDisabled"] = unit.TypeActions.UnitGlobalDisabled()
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ctx.Data["AllLangs"] = translation.AllLangs()
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next.ServeHTTP(ctx.Resp, ctx.Req)
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})
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}
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}
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// HasError returns true if error occurs in form validation.
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// Attention: this function changes ctx.Data and ctx.Flash
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func (ctx *Context) HasError() bool {
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hasErr, ok := ctx.Data["HasError"]
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if !ok {
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return false
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}
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ctx.Flash.ErrorMsg = ctx.GetErrMsg()
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ctx.Data["Flash"] = ctx.Flash
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return hasErr.(bool)
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}
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// GetErrMsg returns error message in form validation.
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func (ctx *Context) GetErrMsg() string {
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msg, _ := ctx.Data["ErrorMsg"].(string)
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if msg == "" {
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msg = "invalid form data"
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}
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return msg
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}
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func (ctx *Context) JSONRedirect(redirect string) {
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ctx.JSON(http.StatusOK, map[string]any{"redirect": redirect})
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}
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func (ctx *Context) JSONOK() {
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ctx.JSON(http.StatusOK, map[string]any{"ok": true}) // this is only a dummy response, frontend seldom uses it
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}
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func (ctx *Context) JSONError(msg string) {
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ctx.JSON(http.StatusBadRequest, map[string]any{"errorMessage": msg})
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}
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