// Copyright 2014 The Gogs Authors. All rights reserved. // Copyright 2020 The Gitea Authors. All rights reserved. // SPDX-License-Identifier: MIT package context import ( "context" "encoding/hex" "fmt" "html/template" "io" "net/http" "net/url" "strings" "time" "code.gitea.io/gitea/models/unit" user_model "code.gitea.io/gitea/models/user" mc "code.gitea.io/gitea/modules/cache" "code.gitea.io/gitea/modules/gitrepo" "code.gitea.io/gitea/modules/httpcache" "code.gitea.io/gitea/modules/setting" "code.gitea.io/gitea/modules/templates" "code.gitea.io/gitea/modules/translation" "code.gitea.io/gitea/modules/web" "code.gitea.io/gitea/modules/web/middleware" web_types "code.gitea.io/gitea/modules/web/types" "gitea.com/go-chi/cache" "gitea.com/go-chi/session" ) // Render represents a template render type Render interface { TemplateLookup(tmpl string, templateCtx context.Context) (templates.TemplateExecutor, error) HTML(w io.Writer, status int, name string, data any, templateCtx context.Context) error } // Context represents context of a request. type Context struct { *Base TemplateContext TemplateContext Render Render PageData map[string]any // data used by JavaScript modules in one page, it's `window.config.pageData` Cache cache.Cache Csrf CSRFProtector Flash *middleware.Flash Session session.Store Link string // current request URL (without query string) Doer *user_model.User // current signed-in user IsSigned bool IsBasicAuth bool ContextUser *user_model.User // the user which is being visited, in most cases it differs from Doer Repo *Repository Org *Organization Package *Package } type TemplateContext map[string]any func init() { web.RegisterResponseStatusProvider[*Context](func(req *http.Request) web_types.ResponseStatusProvider { return req.Context().Value(WebContextKey).(*Context) }) } type webContextKeyType struct{} var WebContextKey = webContextKeyType{} func GetWebContext(req *http.Request) *Context { ctx, _ := req.Context().Value(WebContextKey).(*Context) return ctx } // ValidateContext is a special context for form validation middleware. It may be different from other contexts. type ValidateContext struct { *Base } // GetValidateContext gets a context for middleware form validation func GetValidateContext(req *http.Request) (ctx *ValidateContext) { if ctxAPI, ok := req.Context().Value(apiContextKey).(*APIContext); ok { ctx = &ValidateContext{Base: ctxAPI.Base} } else if ctxWeb, ok := req.Context().Value(WebContextKey).(*Context); ok { ctx = &ValidateContext{Base: ctxWeb.Base} } else { panic("invalid context, expect either APIContext or Context") } return ctx } func NewTemplateContextForWeb(ctx *Context) TemplateContext { tmplCtx := NewTemplateContext(ctx) tmplCtx["Locale"] = ctx.Base.Locale tmplCtx["AvatarUtils"] = templates.NewAvatarUtils(ctx) return tmplCtx } func NewWebContext(base *Base, render Render, session session.Store) *Context { ctx := &Context{ Base: base, Render: render, Session: session, Cache: mc.GetCache(), Link: setting.AppSubURL + strings.TrimSuffix(base.Req.URL.EscapedPath(), "/"), Repo: &Repository{PullRequest: &PullRequest{}}, Org: &Organization{}, } ctx.TemplateContext = NewTemplateContextForWeb(ctx) ctx.Flash = &middleware.Flash{DataStore: ctx, Values: url.Values{}} return ctx } // Contexter initializes a classic context for a request. func Contexter() func(next http.Handler) http.Handler { rnd := templates.HTMLRenderer() csrfOpts := CsrfOptions{ Secret: hex.EncodeToString(setting.GetGeneralTokenSigningSecret()), Cookie: setting.CSRFCookieName, SetCookie: true, Secure: setting.SessionConfig.Secure, CookieHTTPOnly: setting.CSRFCookieHTTPOnly, Header: "X-Csrf-Token", CookieDomain: setting.SessionConfig.Domain, CookiePath: setting.SessionConfig.CookiePath, SameSite: setting.SessionConfig.SameSite, } if !setting.IsProd { CsrfTokenRegenerationInterval = 5 * time.Second // in dev, re-generate the tokens more aggressively for debug purpose } return func(next http.Handler) http.Handler { return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) { base, baseCleanUp := NewBaseContext(resp, req) defer baseCleanUp() ctx := NewWebContext(base, rnd, session.GetSession(req)) ctx.Data.MergeFrom(middleware.CommonTemplateContextData()) ctx.Data["Context"] = ctx // TODO: use "ctx" in template and remove this ctx.Data["CurrentURL"] = setting.AppSubURL + req.URL.RequestURI() ctx.Data["Link"] = ctx.Link // PageData is passed by reference, and it will be rendered to `window.config.pageData` in `head.tmpl` for JavaScript modules ctx.PageData = map[string]any{} ctx.Data["PageData"] = ctx.PageData ctx.Base.AppendContextValue(WebContextKey, ctx) ctx.Base.AppendContextValueFunc(gitrepo.RepositoryContextKey, func() any { return ctx.Repo.GitRepo }) ctx.Csrf = PrepareCSRFProtector(csrfOpts, ctx) // Get the last flash message from cookie lastFlashCookie := middleware.GetSiteCookie(ctx.Req, CookieNameFlash) if vals, _ := url.ParseQuery(lastFlashCookie); len(vals) > 0 { // store last Flash message into the template data, to render it ctx.Data["Flash"] = &middleware.Flash{ DataStore: ctx, Values: vals, ErrorMsg: vals.Get("error"), SuccessMsg: vals.Get("success"), InfoMsg: vals.Get("info"), WarningMsg: vals.Get("warning"), } } // if there are new messages in the ctx.Flash, write them into cookie ctx.Resp.Before(func(resp ResponseWriter) { if val := ctx.Flash.Encode(); val != "" { middleware.SetSiteCookie(ctx.Resp, CookieNameFlash, val, 0) } else if lastFlashCookie != "" { middleware.SetSiteCookie(ctx.Resp, CookieNameFlash, "", -1) } }) // If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid. if ctx.Req.Method == "POST" && strings.Contains(ctx.Req.Header.Get("Content-Type"), "multipart/form-data") { if err := ctx.Req.ParseMultipartForm(setting.Attachment.MaxSize << 20); err != nil && !strings.Contains(err.Error(), "EOF") { // 32MB max size ctx.ServerError("ParseMultipartForm", err) return } } httpcache.SetCacheControlInHeader(ctx.Resp.Header(), 0, "no-transform") ctx.Resp.Header().Set(`X-Frame-Options`, setting.CORSConfig.XFrameOptions) ctx.Data["CsrfToken"] = ctx.Csrf.GetToken() ctx.Data["CsrfTokenHtml"] = template.HTML(`<input type="hidden" name="_csrf" value="` + ctx.Data["CsrfToken"].(string) + `">`) // FIXME: do we really always need these setting? There should be someway to have to avoid having to always set these ctx.Data["DisableMigrations"] = setting.Repository.DisableMigrations ctx.Data["DisableStars"] = setting.Repository.DisableStars ctx.Data["EnableActions"] = setting.Actions.Enabled ctx.Data["ManifestData"] = setting.ManifestData ctx.Data["UnitWikiGlobalDisabled"] = unit.TypeWiki.UnitGlobalDisabled() ctx.Data["UnitIssuesGlobalDisabled"] = unit.TypeIssues.UnitGlobalDisabled() ctx.Data["UnitPullsGlobalDisabled"] = unit.TypePullRequests.UnitGlobalDisabled() ctx.Data["UnitProjectsGlobalDisabled"] = unit.TypeProjects.UnitGlobalDisabled() ctx.Data["UnitActionsGlobalDisabled"] = unit.TypeActions.UnitGlobalDisabled() ctx.Data["AllLangs"] = translation.AllLangs() next.ServeHTTP(ctx.Resp, ctx.Req) }) } } // HasError returns true if error occurs in form validation. // Attention: this function changes ctx.Data and ctx.Flash func (ctx *Context) HasError() bool { hasErr, ok := ctx.Data["HasError"] if !ok { return false } ctx.Flash.ErrorMsg = ctx.GetErrMsg() ctx.Data["Flash"] = ctx.Flash return hasErr.(bool) } // GetErrMsg returns error message in form validation. func (ctx *Context) GetErrMsg() string { msg, _ := ctx.Data["ErrorMsg"].(string) if msg == "" { msg = "invalid form data" } return msg } func (ctx *Context) JSONRedirect(redirect string) { ctx.JSON(http.StatusOK, map[string]any{"redirect": redirect}) } func (ctx *Context) JSONOK() { ctx.JSON(http.StatusOK, map[string]any{"ok": true}) // this is only a dummy response, frontend seldom uses it } func (ctx *Context) JSONError(msg any) { switch v := msg.(type) { case string: ctx.JSON(http.StatusBadRequest, map[string]any{"errorMessage": v, "renderFormat": "text"}) case template.HTML: ctx.JSON(http.StatusBadRequest, map[string]any{"errorMessage": v, "renderFormat": "html"}) default: panic(fmt.Sprintf("unsupported type: %T", msg)) } }