mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-16 04:55:45 +01:00
1fede04b83
Remove unused CSRF options, decouple "new csrf protector" and "prepare" logic, do not redirect to home page if CSRF validation falis (it shouldn't happen in daily usage, if it happens, redirecting to home doesn't help either but just makes the problem more complex for "fetch")
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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"encoding/hex"
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"fmt"
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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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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/gitrepo"
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"code.gitea.io/gitea/modules/httpcache"
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"code.gitea.io/gitea/modules/session"
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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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)
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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.StringCache
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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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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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tmplCtx["RootData"] = ctx.Data
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tmplCtx["Consts"] = map[string]any{
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"RepoUnitTypeCode": unit.TypeCode,
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"RepoUnitTypeIssues": unit.TypeIssues,
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"RepoUnitTypePullRequests": unit.TypePullRequests,
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"RepoUnitTypeReleases": unit.TypeReleases,
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"RepoUnitTypeWiki": unit.TypeWiki,
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"RepoUnitTypeExternalWiki": unit.TypeExternalWiki,
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"RepoUnitTypeExternalTracker": unit.TypeExternalTracker,
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"RepoUnitTypeProjects": unit.TypeProjects,
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"RepoUnitTypePackages": unit.TypePackages,
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"RepoUnitTypeActions": unit.TypeActions,
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}
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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: cache.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: hex.EncodeToString(setting.GetGeneralTokenSigningSecret()),
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Cookie: setting.CSRFCookieName,
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Secure: setting.SessionConfig.Secure,
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CookieHTTPOnly: setting.CSRFCookieHTTPOnly,
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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.GetContextSession(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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// 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(gitrepo.RepositoryContextKey, func() any { return ctx.Repo.GitRepo })
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ctx.Csrf = NewCSRFProtector(csrfOpts)
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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["SystemConfig"] = setting.Config()
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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 && !unit.TypeActions.UnitGlobalDisabled()
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ctx.Data["ManifestData"] = setting.ManifestData
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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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// If HasError is called, then before Redirect, the error message should be stored by ctx.Flash.Error(ctx.GetErrMsg()) again.
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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 any) {
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switch v := msg.(type) {
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case string:
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ctx.JSON(http.StatusBadRequest, map[string]any{"errorMessage": v, "renderFormat": "text"})
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case template.HTML:
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ctx.JSON(http.StatusBadRequest, map[string]any{"errorMessage": v, "renderFormat": "html"})
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default:
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panic(fmt.Sprintf("unsupported type: %T", msg))
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}
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}
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