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gitea/routers/common/markup.go
Brecht Van Lommel 597d1da96b
Fix missing images in editor preview due to wrong links (#31299)
Parse base path and tree path so that media links can be correctly
created with /media/.

Resolves #31294

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2024-06-17 14:16:14 +08:00

103 lines
3.5 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package common
import (
"fmt"
"net/http"
"path"
"strings"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/httplib"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/markdown"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/services/context"
)
// RenderMarkup renders markup text for the /markup and /markdown endpoints
func RenderMarkup(ctx *context.Base, repo *context.Repository, mode, text, urlPathContext, filePath string, wiki bool) {
// urlPathContext format is "/subpath/{user}/{repo}/src/{branch, commit, tag}/{identifier/path}/{file/dir}"
// filePath is the path of the file to render if the end user is trying to preview a repo file (mode == "file")
// filePath will be used as RenderContext.RelativePath
// for example, when previewing file "/gitea/owner/repo/src/branch/features/feat-123/doc/CHANGE.md", then filePath is "doc/CHANGE.md"
// and the urlPathContext is "/gitea/owner/repo/src/branch/features/feat-123/doc"
var markupType, relativePath string
links := markup.Links{AbsolutePrefix: true}
if urlPathContext != "" {
links.Base = fmt.Sprintf("%s%s", httplib.GuessCurrentHostURL(ctx), urlPathContext)
}
switch mode {
case "markdown":
// Raw markdown
if err := markdown.RenderRaw(&markup.RenderContext{
Ctx: ctx,
Links: links,
}, strings.NewReader(text), ctx.Resp); err != nil {
ctx.Error(http.StatusInternalServerError, err.Error())
}
return
case "comment":
// Issue & comment content
markupType = markdown.MarkupName
case "gfm":
// GitHub Flavored Markdown
markupType = markdown.MarkupName
case "file":
markupType = "" // render the repo file content by its extension
relativePath = filePath
default:
ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Unknown mode: %s", mode))
return
}
fields := strings.SplitN(strings.TrimPrefix(urlPathContext, setting.AppSubURL+"/"), "/", 5)
if len(fields) == 5 && fields[2] == "src" && (fields[3] == "branch" || fields[3] == "commit" || fields[3] == "tag") {
// absolute base prefix is something like "https://host/subpath/{user}/{repo}"
absoluteBasePrefix := fmt.Sprintf("%s%s/%s", httplib.GuessCurrentAppURL(ctx), fields[0], fields[1])
fileDir := path.Dir(filePath) // it is "doc" if filePath is "doc/CHANGE.md"
refPath := strings.Join(fields[3:], "/") // it is "branch/features/feat-12/doc"
refPath = strings.TrimSuffix(refPath, "/"+fileDir) // now we get the correct branch path: "branch/features/feat-12"
links = markup.Links{AbsolutePrefix: true, Base: absoluteBasePrefix, BranchPath: refPath, TreePath: fileDir}
}
meta := map[string]string{}
var repoCtx *repo_model.Repository
if repo != nil && repo.Repository != nil {
repoCtx = repo.Repository
if mode == "comment" {
meta = repo.Repository.ComposeMetas(ctx)
} else {
meta = repo.Repository.ComposeDocumentMetas(ctx)
}
}
if mode != "comment" {
meta["mode"] = "document"
}
if err := markup.Render(&markup.RenderContext{
Ctx: ctx,
Repo: repoCtx,
Links: links,
Metas: meta,
IsWiki: wiki,
Type: markupType,
RelativePath: relativePath,
}, strings.NewReader(text), ctx.Resp); err != nil {
if markup.IsErrUnsupportedRenderExtension(err) {
ctx.Error(http.StatusUnprocessableEntity, err.Error())
} else {
ctx.Error(http.StatusInternalServerError, err.Error())
}
return
}
}