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gitea/routers/web/repo/render.go
wxiaoguang 633785a5f3
Refactor markup render system (#32612)
This PR removes (almost) all path tricks, and introduces "renderhelper"
package.

Now we can clearly see the rendering behaviors for comment/file/wiki,
more details are in "renderhelper" tests.

Fix #31411 , fix #18592, fix #25632 and maybe more problems. (ps: fix
#32608 by the way)
2024-11-24 16:18:57 +08:00

72 lines
1.9 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repo
import (
"bytes"
"io"
"net/http"
"path"
"code.gitea.io/gitea/models/renderhelper"
"code.gitea.io/gitea/modules/charset"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/typesniffer"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/context"
)
// RenderFile renders a file by repos path
func RenderFile(ctx *context.Context) {
blob, err := ctx.Repo.Commit.GetBlobByPath(ctx.Repo.TreePath)
if err != nil {
if git.IsErrNotExist(err) {
ctx.NotFound("GetBlobByPath", err)
} else {
ctx.ServerError("GetBlobByPath", err)
}
return
}
dataRc, err := blob.DataAsync()
if err != nil {
ctx.ServerError("DataAsync", err)
return
}
defer dataRc.Close()
buf := make([]byte, 1024)
n, _ := util.ReadAtMost(dataRc, buf)
buf = buf[:n]
st := typesniffer.DetectContentType(buf)
isTextFile := st.IsText()
rd := charset.ToUTF8WithFallbackReader(io.MultiReader(bytes.NewReader(buf), dataRc), charset.ConvertOpts{})
ctx.Resp.Header().Add("Content-Security-Policy", "frame-src 'self'; sandbox allow-scripts")
if markupType := markup.DetectMarkupTypeByFileName(blob.Name()); markupType == "" {
if isTextFile {
_, _ = io.Copy(ctx.Resp, rd)
} else {
http.Error(ctx.Resp, "Unsupported file type render", http.StatusInternalServerError)
}
return
}
rctx := renderhelper.NewRenderContextRepoFile(ctx, ctx.Repo.Repository, renderhelper.RepoFileOptions{
CurrentRefPath: ctx.Repo.BranchNameSubURL(),
CurrentTreePath: path.Dir(ctx.Repo.TreePath),
}).WithRelativePath(ctx.Repo.TreePath).WithInStandalonePage(true)
err = markup.Render(rctx, rd, ctx.Resp)
if err != nil {
log.Error("Failed to render file %q: %v", ctx.Repo.TreePath, err)
http.Error(ctx.Resp, "Failed to render file", http.StatusInternalServerError)
return
}
}