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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package context
import (
"errors"
"fmt"
"html/template"
"net"
"net/http"
"net/url"
"path"
"strconv"
"strings"
"syscall"
"time"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/httplib"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/web/middleware"
)
// RedirectToUser redirect to a differently-named user
func RedirectToUser(ctx *Base, userName string, redirectUserID int64) {
user, err := user_model.GetUserByID(ctx, redirectUserID)
if err != nil {
ctx.Error(http.StatusInternalServerError, "unable to get user")
return
}
redirectPath := strings.Replace(
ctx.Req.URL.EscapedPath(),
url.PathEscape(userName),
url.PathEscape(user.Name),
1,
)
if ctx.Req.URL.RawQuery != "" {
redirectPath += "?" + ctx.Req.URL.RawQuery
}
ctx.Redirect(path.Join(setting.AppSubURL, redirectPath), http.StatusTemporaryRedirect)
}
// RedirectToFirst redirects to first not empty URL which likely belongs to current site.
// If no suitable redirection is found, it redirects to the home.
// It returns the location it redirected to.
func (ctx *Context) RedirectToFirst(location ...string) string {
for _, loc := range location {
if len(loc) == 0 {
continue
}
if httplib.IsRiskyRedirectURL(loc) {
continue
}
ctx.Redirect(loc)
return loc
}
ctx.Redirect(setting.AppSubURL + "/")
return setting.AppSubURL + "/"
}
const tplStatus500 base.TplName = "status/500"
// HTML calls Context.HTML and renders the template to HTTP response
func (ctx *Context) HTML(status int, name base.TplName) {
log.Debug("Template: %s", name)
tmplStartTime := time.Now()
if !setting.IsProd {
ctx.Data["TemplateName"] = name
}
ctx.Data["TemplateLoadTimes"] = func() string {
return strconv.FormatInt(time.Since(tmplStartTime).Nanoseconds()/1e6, 10) + "ms"
}
err := ctx.Render.HTML(ctx.Resp, status, string(name), ctx.Data, ctx.TemplateContext)
if err == nil || errors.Is(err, syscall.EPIPE) {
return
}
// if rendering fails, show error page
if name != tplStatus500 {
err = fmt.Errorf("failed to render template: %s, error: %s", name, templates.HandleTemplateRenderingError(err))
ctx.ServerError("Render failed", err) // show the 500 error page
} else {
ctx.PlainText(http.StatusInternalServerError, "Unable to render status/500 page, the template system is broken, or Gitea can't find your template files.")
return
}
}
// JSONTemplate renders the template as JSON response
// keep in mind that the template is processed in HTML context, so JSON-things should be handled carefully, eg: by JSEscape
func (ctx *Context) JSONTemplate(tmpl base.TplName) {
t, err := ctx.Render.TemplateLookup(string(tmpl), nil)
if err != nil {
ctx.ServerError("unable to find template", err)
return
}
ctx.Resp.Header().Set("Content-Type", "application/json")
if err = t.Execute(ctx.Resp, ctx.Data); err != nil {
ctx.ServerError("unable to execute template", err)
}
}
// RenderToHTML renders the template content to a HTML string
func (ctx *Context) RenderToHTML(name base.TplName, data map[string]any) (template.HTML, error) {
var buf strings.Builder
err := ctx.Render.HTML(&buf, 0, string(name), data, ctx.TemplateContext)
return template.HTML(buf.String()), err
}
// RenderWithErr used for page has form validation but need to prompt error to users.
func (ctx *Context) RenderWithErr(msg any, tpl base.TplName, form any) {
if form != nil {
middleware.AssignForm(form, ctx.Data)
}
ctx.Flash.Error(msg, true)
ctx.HTML(http.StatusOK, tpl)
}
// NotFound displays a 404 (Not Found) page and prints the given error, if any.
func (ctx *Context) NotFound(logMsg string, logErr error) {
ctx.notFoundInternal(logMsg, logErr)
}
func (ctx *Context) notFoundInternal(logMsg string, logErr error) {
if logErr != nil {
log.Log(2, log.DEBUG, "%s: %v", logMsg, logErr)
if !setting.IsProd {
ctx.Data["ErrorMsg"] = logErr
}
}
// response simple message if Accept isn't text/html
showHTML := false
for _, part := range ctx.Req.Header["Accept"] {
if strings.Contains(part, "text/html") {
showHTML = true
break
}
}
if !showHTML {
ctx.plainTextInternal(3, http.StatusNotFound, []byte("Not found.\n"))
return
}
ctx.Data["IsRepo"] = ctx.Repo.Repository != nil
ctx.Data["Title"] = "Page Not Found"
ctx.HTML(http.StatusNotFound, base.TplName("status/404"))
}
// ServerError displays a 500 (Internal Server Error) page and prints the given error, if any.
func (ctx *Context) ServerError(logMsg string, logErr error) {
ctx.serverErrorInternal(logMsg, logErr)
}
func (ctx *Context) serverErrorInternal(logMsg string, logErr error) {
if logErr != nil {
log.ErrorWithSkip(2, "%s: %v", logMsg, logErr)
if _, ok := logErr.(*net.OpError); ok || errors.Is(logErr, &net.OpError{}) {
// This is an error within the underlying connection
// and further rendering will not work so just return
return
}
// it's safe to show internal error to admin users, and it helps
if !setting.IsProd || (ctx.Doer != nil && ctx.Doer.IsAdmin) {
ctx.Data["ErrorMsg"] = fmt.Sprintf("%s, %s", logMsg, logErr)
}
}
ctx.Data["Title"] = "Internal Server Error"
ctx.HTML(http.StatusInternalServerError, tplStatus500)
}
// NotFoundOrServerError use error check function to determine if the error
// is about not found. It responds with 404 status code for not found error,
// or error context description for logging purpose of 500 server error.
// TODO: remove the "errCheck" and use util.ErrNotFound to check
func (ctx *Context) NotFoundOrServerError(logMsg string, errCheck func(error) bool, logErr error) {
if errCheck(logErr) {
ctx.notFoundInternal(logMsg, logErr)
return
}
ctx.serverErrorInternal(logMsg, logErr)
}
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