forked from fluffle/goirc
/
cmd-google.go
177 lines (155 loc) · 4.31 KB
/
cmd-google.go
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package main
import (
irc "github.com/fluffle/goirc/client"
"fmt"
"strings"
"os"
"http"
"net"
"url"
"io/ioutil"
"html"
"regexp"
"strconv"
"utf8"
)
func tr(conn *irc.Conn, nick *irc.Nick, args, target string) {
if args == "" {
return
}
var sourcelang, targetlang, text string
index := strings.IndexAny(args, " ") // handle spaces and ideographic spaces (U+3000)
if index == 5 && args[2] == '|' {
sourcelang = args[:2]
targetlang = args[3:5]
if args[5] == ' ' {
text = args[6:]
} else {
text = args[5 + utf8.RuneLen(3000):]
}
} else {
sourcelang = "auto"
targetlang = "en"
text = args
}
say(conn, target, translate(sourcelang, targetlang, text))
}
func roman(conn *irc.Conn, nick *irc.Nick, args, target string) {
if args == "" {
return
}
var sourcelang, targetlang string
if utf8.NewString(args).IsASCII() {
sourcelang = "en"
} else {
sourcelang = "ja"
}
targetlang, _ = conf.String(conn.Network, "roman")
if targetlang == "" {
targetlang = "ja"
}
say(conn, target, translate(sourcelang, targetlang, args))
}
func translate(sourcelang, targetlang, text string) string {
uri := fmt.Sprintf("http://translate.google.com/translate_a/t?client=t&hl=%s&sl=%s&tl=en-US&text=%s",
targetlang, sourcelang, url.QueryEscape(text))
b, err := getUserAgent(uri)
if err != nil {
return "Error while requesting translation"
}
result := strings.SplitN(string(b), `"`, 11)
if len(result) < 11 {
return "Error while parsing translation"
}
if sourcelang == "auto" {
return result[9]
}
source := utf8.NewString(result[1])
romanized := utf8.NewString(result[5])
if romanized.RuneCount() > 0 {
if sourcelang == "en" && !strings.Contains(text, " ") {
// Google duplicates when there is only one source word
source_left := source.Slice(0, source.RuneCount()/2)
source_right := source.Slice(source.RuneCount()/2, source.RuneCount())
romanized_left := romanized.Slice(0, romanized.RuneCount()/2)
romanized_right :=romanized.Slice(romanized.RuneCount()/2, romanized.RuneCount())
if (source_left == source_right &&
strings.ToLower(romanized_left) == strings.ToLower(romanized_right)) {
return fmt.Sprintf( "%s: %s", source_left, romanized_left)
}
}
return fmt.Sprintf("%s: %s", source, romanized)
}
return source.String()
}
func calc(conn *irc.Conn, nick *irc.Nick, args, target string) {
if args == "" {
return
}
uri := fmt.Sprintf("http://www.google.com/ig/calculator?hl=en&q=%s", url.QueryEscape(args))
b, err := getUserAgent(uri)
if err != nil {
say(conn, target, "%s: Error while requesting calculation", nick.Nick); return
}
re := regexp.MustCompile(`{lhs: "(.*)",rhs: "(.*)",error: "(.*)",icc: (true|false)}`)
result := re.FindSubmatch(b)
if len(result) != 5 {
say(conn, target, "%s: Error while parsing.", nick.Nick)
return
}
if len(result[3]) > 1 {
output := fmt.Sprintf(`"%s"`, result[3])
error := parseCalc(output)
if error != "" {
say(conn, target, "%s: Error: %s", nick.Nick, error)
} else {
say(conn, target, "%s: Error while calculating and error while decoding error.", nick.Nick)
}
return
}
if len(result[1]) == 0 || len(result[2]) == 0 {
say(conn, target, "%s: Error while calculating.", nick.Nick)
return
}
output := fmt.Sprintf(`"%s = %s"`, result[1], result[2])
output = parseCalc(output)
if output == "" {
say(conn, target, "%s: Error while decoding.", nick.Nick); return
}
say(conn, target, output)
}
func parseCalc(output string) string {
parsed, err := strconv.Unquote(output)
if err != nil {
return ""
}
parsed = html.UnescapeString(parsed)
parsed = strings.Replace(parsed, "<sup>", "^(", -1)
parsed = strings.Replace(parsed, "</sup>", ")", -1)
return parsed
}
// make a GET request with a fake user agent
// this is definitely not for those undocumented Google APIs
func getUserAgent(urlstr string) ([]byte, os.Error) {
urlobj, err := url.Parse(urlstr)
if err != nil {
return nil, err
}
conn, err := net.Dial("tcp", urlobj.Host + ":http")
if err != nil {
return nil, err
}
req, err := http.NewRequest("GET", urlstr, nil)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", "Mozilla/5.0")
httpconn := http.NewClientConn(conn, nil)
response, err := httpconn.Do(req)
if err != nil {
return nil, err
}
defer response.Body.Close()
b, err := ioutil.ReadAll(response.Body)
return b, err
}