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Replace #16455 Close #21803 Mixing different Gitea contexts together causes some problems: 1. Unable to respond proper content when error occurs, eg: Web should respond HTML while API should respond JSON 2. Unclear dependency, eg: it's unclear when Context is used in APIContext, which fields should be initialized, which methods are necessary. To make things clear, this PR introduces a Base context, it only provides basic Req/Resp/Data features. This PR mainly moves code. There are still many legacy problems and TODOs in code, leave unrelated changes to future PRs.
182 lines
5.3 KiB
Go
182 lines
5.3 KiB
Go
// Copyright 2023 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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"errors"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"path"
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"strconv"
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"strings"
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"time"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/log"
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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/web/middleware"
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)
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// RedirectToUser redirect to a differently-named user
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func RedirectToUser(ctx *Base, userName string, redirectUserID int64) {
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user, err := user_model.GetUserByID(ctx, redirectUserID)
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if err != nil {
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ctx.Error(http.StatusInternalServerError, "unable to get user")
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return
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}
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redirectPath := strings.Replace(
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ctx.Req.URL.EscapedPath(),
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url.PathEscape(userName),
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url.PathEscape(user.Name),
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1,
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)
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if ctx.Req.URL.RawQuery != "" {
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redirectPath += "?" + ctx.Req.URL.RawQuery
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}
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ctx.Redirect(path.Join(setting.AppSubURL, redirectPath), http.StatusTemporaryRedirect)
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}
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// RedirectToFirst redirects to first not empty URL
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func (ctx *Context) RedirectToFirst(location ...string) {
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for _, loc := range location {
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if len(loc) == 0 {
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continue
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}
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// Unfortunately browsers consider a redirect Location with preceding "//" and "/\" as meaning redirect to "http(s)://REST_OF_PATH"
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// Therefore we should ignore these redirect locations to prevent open redirects
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if len(loc) > 1 && loc[0] == '/' && (loc[1] == '/' || loc[1] == '\\') {
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continue
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}
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u, err := url.Parse(loc)
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if err != nil || ((u.Scheme != "" || u.Host != "") && !strings.HasPrefix(strings.ToLower(loc), strings.ToLower(setting.AppURL))) {
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continue
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}
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ctx.Redirect(loc)
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return
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}
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ctx.Redirect(setting.AppSubURL + "/")
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}
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const tplStatus500 base.TplName = "status/500"
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// HTML calls Context.HTML and renders the template to HTTP response
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func (ctx *Context) HTML(status int, name base.TplName) {
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log.Debug("Template: %s", name)
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tmplStartTime := time.Now()
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if !setting.IsProd {
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ctx.Data["TemplateName"] = name
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}
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ctx.Data["TemplateLoadTimes"] = func() string {
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return strconv.FormatInt(time.Since(tmplStartTime).Nanoseconds()/1e6, 10) + "ms"
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}
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err := ctx.Render.HTML(ctx.Resp, status, string(name), ctx.Data)
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if err == nil {
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return
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}
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// if rendering fails, show error page
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if name != tplStatus500 {
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err = fmt.Errorf("failed to render template: %s, error: %s", name, templates.HandleTemplateRenderingError(err))
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ctx.ServerError("Render failed", err) // show the 500 error page
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} else {
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ctx.PlainText(http.StatusInternalServerError, "Unable to render status/500 page, the template system is broken, or Gitea can't find your template files.")
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return
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}
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}
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// RenderToString renders the template content to a string
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func (ctx *Context) RenderToString(name base.TplName, data map[string]interface{}) (string, error) {
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var buf strings.Builder
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err := ctx.Render.HTML(&buf, http.StatusOK, string(name), data)
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return buf.String(), err
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}
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// RenderWithErr used for page has form validation but need to prompt error to users.
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func (ctx *Context) RenderWithErr(msg string, tpl base.TplName, form interface{}) {
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if form != nil {
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middleware.AssignForm(form, ctx.Data)
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}
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ctx.Flash.ErrorMsg = msg
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ctx.Data["Flash"] = ctx.Flash
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ctx.HTML(http.StatusOK, tpl)
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}
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// NotFound displays a 404 (Not Found) page and prints the given error, if any.
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func (ctx *Context) NotFound(logMsg string, logErr error) {
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ctx.notFoundInternal(logMsg, logErr)
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}
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func (ctx *Context) notFoundInternal(logMsg string, logErr error) {
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if logErr != nil {
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log.Log(2, log.DEBUG, "%s: %v", logMsg, logErr)
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if !setting.IsProd {
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ctx.Data["ErrorMsg"] = logErr
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}
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}
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// response simple message if Accept isn't text/html
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showHTML := false
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for _, part := range ctx.Req.Header["Accept"] {
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if strings.Contains(part, "text/html") {
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showHTML = true
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break
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}
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}
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if !showHTML {
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ctx.plainTextInternal(3, http.StatusNotFound, []byte("Not found.\n"))
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return
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}
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ctx.Data["IsRepo"] = ctx.Repo.Repository != nil
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ctx.Data["Title"] = "Page Not Found"
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ctx.HTML(http.StatusNotFound, base.TplName("status/404"))
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}
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// ServerError displays a 500 (Internal Server Error) page and prints the given error, if any.
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func (ctx *Context) ServerError(logMsg string, logErr error) {
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ctx.serverErrorInternal(logMsg, logErr)
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}
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func (ctx *Context) serverErrorInternal(logMsg string, logErr error) {
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if logErr != nil {
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log.ErrorWithSkip(2, "%s: %v", logMsg, logErr)
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if _, ok := logErr.(*net.OpError); ok || errors.Is(logErr, &net.OpError{}) {
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// This is an error within the underlying connection
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// and further rendering will not work so just return
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return
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}
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// it's safe to show internal error to admin users, and it helps
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if !setting.IsProd || (ctx.Doer != nil && ctx.Doer.IsAdmin) {
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ctx.Data["ErrorMsg"] = fmt.Sprintf("%s, %s", logMsg, logErr)
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}
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}
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ctx.Data["Title"] = "Internal Server Error"
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ctx.HTML(http.StatusInternalServerError, tplStatus500)
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}
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// NotFoundOrServerError use error check function to determine if the error
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// is about not found. It responds with 404 status code for not found error,
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// or error context description for logging purpose of 500 server error.
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func (ctx *Context) NotFoundOrServerError(logMsg string, errCheck func(error) bool, logErr error) {
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if errCheck(logErr) {
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ctx.notFoundInternal(logMsg, logErr)
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return
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}
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ctx.serverErrorInternal(logMsg, logErr)
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}
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