plugins/search.go (view raw)
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package plugins import ( "bytes" "fmt" "io" "net/http" "net/url" "strings" "time" "golang.org/x/net/html" "gopkg.in/irc.v3" ) func init() { Register(Search{}) } type Search struct{} func (Search) Triggers() []string { return []string{".ddg", ".g", ".mdn", ".wiki"} } var ddgClient = &http.Client{ Timeout: 10 * time.Second, } func ddgParse(body io.Reader) (string, error) { inResult := false href := "" var snippet strings.Builder tok := html.NewTokenizer(body) for tt := tok.Next(); tt != html.ErrorToken; tt = tok.Next() { switch tt { case html.StartTagToken: tag, hasAttr := tok.TagName() if tag[0] == 'a' { if hasAttr { var key []byte var val []byte var lhref []byte isRes := false for hasAttr { key, val, hasAttr = tok.TagAttr() if bytes.Equal(key, []byte("href")) { lhref = val } else if bytes.Equal(val, []byte("result__snippet")) { isRes = true } } if isRes && len(lhref) != 0 { realUrl, err := url.Parse(string(lhref)) if err == nil { if v, ok := realUrl.Query()["uddg"]; len(v) > 0 && ok { inResult = true href = v[0] } } } } } else if tag[0] == 'b' { // support bold text //snippet.WriteRune('\x02') } case html.TextToken: if inResult && snippet.Len() < 300 { snippet.Write(tok.Text()) } case html.EndTagToken: tag, _ := tok.TagName() if inResult && tag[0] == 'a' { var len int if snippet.Len() > 300 { len = 300 } else { len = snippet.Len() } return snippet.String()[:len] + " - " + href, nil } else if inResult && tag[0] == 'b' { //snippet.WriteRune('\x02') } } } if err := tok.Err(); err != io.EOF && err != nil { return "HTML parse error", err } else { return "No results.", nil } } // Use DuckDuckGo's func ddg(query string) (string, error) { req, err := http.NewRequest("GET", "https://html.duckduckgo.com/html", nil) if err != nil { return "Client request error", err } req.Header.Add("User-Agent", "github.com/icyphox/paprika") q := req.URL.Query() q.Add("q", query) req.URL.RawQuery = q.Encode() res, err := ddgClient.Do(req) if err != nil { return "Server response error", err } defer res.Body.Close() result, err := ddgParse(res.Body) if err != nil { return "HTML parse error", err } return result, nil } // This is just an alias for now. func google(query string) (string, error) { return ddg(query) } func mdn(query string) (string, error) { return ddg("site:https://developer.mozilla.org/en-US " + query) } func wiki(query string) (string, error) { return ddg("site:https://en.wikipedia.org " + query) } func (Search) Execute(m *irc.Message) (string, error) { parsed := strings.SplitN(m.Trailing(), " ", 2) if len(parsed) != 2 { return fmt.Sprintf("Usage: %s <query>", parsed[0]), nil } trigger, query := parsed[0], parsed[1] switch trigger { case ".mdn": return mdn(query) case ".wiki": return wiki(query) case ".g": return google(query) default: return ddg(query) } } |