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gitea/routers/common/markup.go

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// 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"
"strings"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/markdown"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/context"
"mvdan.cc/xurls/v2"
)
// RenderMarkup renders markup text for the /markup and /markdown endpoints
func RenderMarkup(ctx *context.Base, repo *context.Repository, mode, text, urlPrefix, filePath string, wiki bool) {
var markupType string
relativePath := ""
if len(text) == 0 {
_, _ = ctx.Write([]byte(""))
return
}
switch mode {
case "markdown":
// Raw markdown
if err := markdown.RenderRaw(&markup.RenderContext{
Ctx: ctx,
Links: markup.Links{
AbsolutePrefix: true,
Base: urlPrefix,
},
}, strings.NewReader(text), ctx.Resp); err != nil {
ctx.Error(http.StatusInternalServerError, err.Error())
}
return
case "comment":
// Comment as markdown
markupType = markdown.MarkupName
case "gfm":
// Github Flavored Markdown as document
markupType = markdown.MarkupName
case "file":
// File as document based on file extension
markupType = ""
relativePath = filePath
default:
ctx.Error(http.StatusUnprocessableEntity, fmt.Sprintf("Unknown mode: %s", mode))
return
}
if !strings.HasPrefix(setting.AppSubURL+"/", urlPrefix) {
// check if urlPrefix is already set to a URL
linkRegex, _ := xurls.StrictMatchingScheme("https?://")
m := linkRegex.FindStringIndex(urlPrefix)
if m == nil {
urlPrefix = util.URLJoin(setting.AppURL, urlPrefix)
}
}
meta := map[string]string{}
if repo != nil && repo.Repository != nil {
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,
Links: markup.Links{
AbsolutePrefix: true,
Base: urlPrefix,
},
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
}
}