forgejo/routers/web/repo/blame.go
zeripath bbffcc3aec
Multiple Escaping Improvements (#17551)
There are multiple places where Gitea does not properly escape URLs that it is building and there are multiple places where it builds urls when there is already a simpler function available to use this.
    
This is an extensive PR attempting to fix these issues.

1. The first commit in this PR looks through all href, src and links in the Gitea codebase and has attempted to catch all the places where there is potentially incomplete escaping.
2. Whilst doing this we will prefer to use functions that create URLs over recreating them by hand.
3. All uses of strings should be directly escaped - even if they are not currently expected to contain escaping characters. The main benefit to doing this will be that we can consider relaxing the constraints on user names and reponames in future. 
4. The next commit looks at escaping in the wiki and re-considers the urls that are used there. Using the improved escaping here wiki files containing '/'. (This implementation will currently still place all of the wiki files the root directory of the repo but this would not be difficult to change.)
5. The title generation in feeds is now properly escaped.
6. EscapePound is no longer needed - urls should be PathEscaped / QueryEscaped as necessary but then re-escaped with Escape when creating html with locales Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-11-16 18:18:25 +00:00

260 lines
6.7 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package repo
import (
"fmt"
gotemplate "html/template"
"net/http"
"net/url"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
)
const (
tplBlame base.TplName = "repo/home"
)
type blameRow struct {
RowNumber int
Avatar gotemplate.HTML
RepoLink string
PartSha string
PreviousSha string
PreviousShaURL string
IsFirstCommit bool
CommitURL string
CommitMessage string
CommitSince gotemplate.HTML
Code gotemplate.HTML
}
// RefBlame render blame page
func RefBlame(ctx *context.Context) {
fileName := ctx.Repo.TreePath
if len(fileName) == 0 {
ctx.NotFound("Blame FileName", nil)
return
}
userName := ctx.Repo.Owner.Name
repoName := ctx.Repo.Repository.Name
commitID := ctx.Repo.CommitID
branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
treeLink := branchLink
rawLink := ctx.Repo.RepoLink + "/raw/" + ctx.Repo.BranchNameSubURL()
if len(ctx.Repo.TreePath) > 0 {
treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
}
var treeNames []string
paths := make([]string, 0, 5)
if len(ctx.Repo.TreePath) > 0 {
treeNames = strings.Split(ctx.Repo.TreePath, "/")
for i := range treeNames {
paths = append(paths, strings.Join(treeNames[:i+1], "/"))
}
ctx.Data["HasParentPath"] = true
if len(paths)-2 >= 0 {
ctx.Data["ParentPath"] = "/" + paths[len(paths)-1]
}
}
// Get current entry user currently looking at.
entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
if err != nil {
ctx.NotFoundOrServerError("Repo.Commit.GetTreeEntryByPath", git.IsErrNotExist, err)
return
}
blob := entry.Blob()
ctx.Data["Paths"] = paths
ctx.Data["TreeLink"] = treeLink
ctx.Data["TreeNames"] = treeNames
ctx.Data["BranchLink"] = branchLink
ctx.Data["RawFileLink"] = rawLink + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
ctx.Data["PageIsViewCode"] = true
ctx.Data["IsBlame"] = true
ctx.Data["FileSize"] = blob.Size()
ctx.Data["FileName"] = blob.Name()
ctx.Data["NumLines"], err = blob.GetBlobLineCount()
if err != nil {
ctx.NotFound("GetBlobLineCount", err)
return
}
blameReader, err := git.CreateBlameReader(ctx, models.RepoPath(userName, repoName), commitID, fileName)
if err != nil {
ctx.NotFound("CreateBlameReader", err)
return
}
defer blameReader.Close()
blameParts := make([]git.BlamePart, 0)
for {
blamePart, err := blameReader.NextPart()
if err != nil {
ctx.NotFound("NextPart", err)
return
}
if blamePart == nil {
break
}
blameParts = append(blameParts, *blamePart)
}
// Get Topics of this repo
renderRepoTopics(ctx)
if ctx.Written() {
return
}
commitNames, previousCommits := processBlameParts(ctx, blameParts)
if ctx.Written() {
return
}
renderBlame(ctx, blameParts, commitNames, previousCommits)
ctx.HTML(http.StatusOK, tplBlame)
}
func processBlameParts(ctx *context.Context, blameParts []git.BlamePart) (map[string]*models.UserCommit, map[string]string) {
// store commit data by SHA to look up avatar info etc
commitNames := make(map[string]*models.UserCommit)
// previousCommits contains links from SHA to parent SHA,
// if parent also contains the current TreePath.
previousCommits := make(map[string]string)
// and as blameParts can reference the same commits multiple
// times, we cache the lookup work locally
commits := make([]*git.Commit, 0, len(blameParts))
commitCache := map[string]*git.Commit{}
commitCache[ctx.Repo.Commit.ID.String()] = ctx.Repo.Commit
for _, part := range blameParts {
sha := part.Sha
if _, ok := commitNames[sha]; ok {
continue
}
// find the blamePart commit, to look up parent & email address for avatars
commit, ok := commitCache[sha]
var err error
if !ok {
commit, err = ctx.Repo.GitRepo.GetCommit(sha)
if err != nil {
if git.IsErrNotExist(err) {
ctx.NotFound("Repo.GitRepo.GetCommit", err)
} else {
ctx.ServerError("Repo.GitRepo.GetCommit", err)
}
return nil, nil
}
commitCache[sha] = commit
}
// find parent commit
if commit.ParentCount() > 0 {
psha := commit.Parents[0]
previousCommit, ok := commitCache[psha.String()]
if !ok {
previousCommit, _ = commit.Parent(0)
if previousCommit != nil {
commitCache[psha.String()] = previousCommit
}
}
// only store parent commit ONCE, if it has the file
if previousCommit != nil {
if haz1, _ := previousCommit.HasFile(ctx.Repo.TreePath); haz1 {
previousCommits[commit.ID.String()] = previousCommit.ID.String()
}
}
}
commits = append(commits, commit)
}
// populate commit email addresses to later look up avatars.
for _, c := range models.ValidateCommitsWithEmails(commits) {
commitNames[c.ID.String()] = c
}
return commitNames, previousCommits
}
func renderBlame(ctx *context.Context, blameParts []git.BlamePart, commitNames map[string]*models.UserCommit, previousCommits map[string]string) {
repoLink := ctx.Repo.RepoLink
var lines = make([]string, 0)
rows := make([]*blameRow, 0)
var i = 0
var commitCnt = 0
for _, part := range blameParts {
for index, line := range part.Lines {
i++
lines = append(lines, line)
br := &blameRow{
RowNumber: i,
}
commit := commitNames[part.Sha]
previousSha := previousCommits[part.Sha]
if index == 0 {
// Count commit number
commitCnt++
// User avatar image
commitSince := timeutil.TimeSinceUnix(timeutil.TimeStamp(commit.Author.When.Unix()), ctx.Data["Lang"].(string))
var avatar string
if commit.User != nil {
avatar = string(templates.Avatar(commit.User, 18, "mr-3"))
} else {
avatar = string(templates.AvatarByEmail(commit.Author.Email, commit.Author.Name, 18, "mr-3"))
}
br.Avatar = gotemplate.HTML(avatar)
br.RepoLink = repoLink
br.PartSha = part.Sha
br.PreviousSha = previousSha
br.PreviousShaURL = fmt.Sprintf("%s/blame/commit/%s/%s", repoLink, url.PathEscape(previousSha), util.PathEscapeSegments(ctx.Repo.TreePath))
br.CommitURL = fmt.Sprintf("%s/commit/%s", repoLink, url.PathEscape(part.Sha))
br.CommitMessage = commit.CommitMessage
br.CommitSince = commitSince
}
if i != len(lines)-1 {
line += "\n"
}
fileName := fmt.Sprintf("%v", ctx.Data["FileName"])
line = highlight.Code(fileName, line)
br.Code = gotemplate.HTML(line)
rows = append(rows, br)
}
}
ctx.Data["BlameRows"] = rows
ctx.Data["CommitCnt"] = commitCnt
}