105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
package owl
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"golang.org/x/net/html"
|
|
)
|
|
|
|
type WebmentionIn struct {
|
|
Source string `yaml:"source"`
|
|
Title string `yaml:"title"`
|
|
ApprovalStatus string `yaml:"approval_status"`
|
|
RetrievedAt time.Time `yaml:"retrieved_at"`
|
|
}
|
|
|
|
type WebmentionOut struct {
|
|
Target string `yaml:"target"`
|
|
Supported bool `yaml:"supported"`
|
|
ScannedAt time.Time `yaml:"scanned_at"`
|
|
LastSentAt time.Time `yaml:"last_sent_at"`
|
|
}
|
|
|
|
type HttpRetriever interface {
|
|
Get(url string) ([]byte, error)
|
|
}
|
|
|
|
type MicroformatParser interface {
|
|
ParseHEntry(data []byte) (ParsedHEntry, error)
|
|
}
|
|
|
|
type OwlHttpRetriever struct{}
|
|
|
|
type OwlMicroformatParser struct{}
|
|
|
|
type ParsedHEntry struct {
|
|
Title string
|
|
}
|
|
|
|
func (OwlHttpRetriever) Get(url string) ([]byte, error) {
|
|
resp, err := http.Get(url)
|
|
if err != nil {
|
|
return []byte{}, err
|
|
}
|
|
var data []byte
|
|
_, err = resp.Body.Read(data)
|
|
// TODO: encoding
|
|
return data, err
|
|
}
|
|
|
|
func collectText(n *html.Node, buf *bytes.Buffer) {
|
|
if n.Type == html.TextNode {
|
|
buf.WriteString(n.Data)
|
|
}
|
|
for c := n.FirstChild; c != nil; c = c.NextSibling {
|
|
collectText(c, buf)
|
|
}
|
|
}
|
|
|
|
func (OwlMicroformatParser) ParseHEntry(data []byte) (ParsedHEntry, error) {
|
|
doc, err := html.Parse(strings.NewReader(string(data)))
|
|
if err != nil {
|
|
return ParsedHEntry{}, err
|
|
}
|
|
|
|
var interpretHFeed func(*html.Node, *ParsedHEntry, bool) (ParsedHEntry, error)
|
|
interpretHFeed = func(n *html.Node, curr *ParsedHEntry, parent bool) (ParsedHEntry, error) {
|
|
attrs := n.Attr
|
|
for _, attr := range attrs {
|
|
if attr.Key == "class" && strings.Contains(attr.Val, "p-name") {
|
|
buf := &bytes.Buffer{}
|
|
collectText(n, buf)
|
|
curr.Title = buf.String()
|
|
return *curr, nil
|
|
}
|
|
}
|
|
|
|
for c := n.FirstChild; c != nil; c = c.NextSibling {
|
|
interpretHFeed(c, curr, false)
|
|
}
|
|
return *curr, nil
|
|
}
|
|
|
|
var findHFeed func(*html.Node) (ParsedHEntry, error)
|
|
findHFeed = func(n *html.Node) (ParsedHEntry, error) {
|
|
attrs := n.Attr
|
|
for _, attr := range attrs {
|
|
if attr.Key == "class" && strings.Contains(attr.Val, "h-entry") {
|
|
return interpretHFeed(n, &ParsedHEntry{}, true)
|
|
}
|
|
}
|
|
for c := n.FirstChild; c != nil; c = c.NextSibling {
|
|
entry, err := findHFeed(c)
|
|
if err == nil {
|
|
return entry, nil
|
|
}
|
|
}
|
|
return ParsedHEntry{}, errors.New("no h-entry found")
|
|
}
|
|
return findHFeed(doc)
|
|
}
|