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Fix external render, make iframe render work (#35727, #35730) (#35731)

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Backport #35727 and #35730

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
wxiaoguang
2025-10-23 16:07:17 +08:00
committed by GitHub
parent 0925089b5e
commit b2f2f8528a
19 changed files with 391 additions and 121 deletions
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30
modules/markup/internal/finalprocessor.go
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@@ -5,11 +5,13 @@ package internal
import (
"bytes"
"html/template"
"io"
)
type finalProcessor struct {
renderInternal *RenderInternal
extraHeadHTML template.HTML
output io.Writer
buf bytes.Buffer
@@ -25,6 +27,32 @@ func (p *finalProcessor) Close() error {
// because "postProcess" already does so. In the future we could optimize the code to process data on the fly.
buf := p.buf.Bytes()
buf = bytes.ReplaceAll(buf, []byte(` data-attr-class="`+p.renderInternal.secureIDPrefix), []byte(` class="`))
_, err := p.output.Write(buf)
tmp := bytes.TrimSpace(buf)
isLikelyHTML := len(tmp) != 0 && tmp[0] == '<' && tmp[len(tmp)-1] == '>' && bytes.Index(tmp, []byte(`</`)) > 0
if !isLikelyHTML {
// not HTML, write back directly
_, err := p.output.Write(buf)
return err
}
// add our extra head HTML into output
headBytes := []byte("<head>")
posHead := bytes.Index(buf, headBytes)
var part1, part2 []byte
if posHead >= 0 {
part1, part2 = buf[:posHead+len(headBytes)], buf[posHead+len(headBytes):]
} else {
part1, part2 = nil, buf
}
if len(part1) > 0 {
if _, err := p.output.Write(part1); err != nil {
return err
}
}
if _, err := io.WriteString(p.output, string(p.extraHeadHTML)); err != nil {
return err
}
_, err := p.output.Write(part2)
return err
}