65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package koushinviewhtml
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import (
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"bytes"
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"fmt"
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"html/template"
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"io/ioutil"
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"strings"
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"git.sr.ht/~emersion/koushin"
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koushinbase "git.sr.ht/~emersion/koushin/plugins/base"
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"github.com/emersion/go-message"
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)
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const tplSrc = `
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<!-- allow-same-origin is required to resize the frame with its content -->
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<!-- allow-popups is required for target="_blank" links -->
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<iframe id="email-frame" srcdoc="{{.}}" sandbox="allow-same-origin allow-popups"></iframe>
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<script src="/plugins/viewhtml/assets/script.js"></script>
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<link rel="stylesheet" href="/plugins/viewhtml/assets/style.css">
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`
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var tpl = template.Must(template.New("view-html.html").Parse(tplSrc))
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type viewer struct{}
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func (viewer) ViewMessagePart(ctx *koushin.Context, msg *koushinbase.IMAPMessage, part *message.Entity) (interface{}, error) {
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allowRemoteResources := ctx.QueryParam("allow-remote-resources") == "1"
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mimeType, _, err := part.Header.ContentType()
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if err != nil {
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return nil, err
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}
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if !strings.EqualFold(mimeType, "text/html") {
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return nil, koushinbase.ErrViewUnsupported
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}
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body, err := ioutil.ReadAll(part.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read part body: %v", err)
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}
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san := sanitizer{
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msg: msg,
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allowRemoteResources: allowRemoteResources,
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}
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body, err = san.sanitizeHTML(body)
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if err != nil {
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return nil, fmt.Errorf("failed to sanitize HTML part: %v", err)
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}
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ctx.Set("viewhtml.hasRemoteResources", san.hasRemoteResources)
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var buf bytes.Buffer
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err = tpl.Execute(&buf, string(body))
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if err != nil {
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return nil, err
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}
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return template.HTML(buf.String()), nil
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}
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func init() {
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koushinbase.RegisterViewer(viewer{})
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}
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