Fix google translator

xwjdsh · Jun 9, 2021 · 68d191c · 68d191c
1 parent 3dbd667
commit 68d191c
Showing 1 changed file with 14 additions and 119 deletions.
diff --git a/google.go b/google.go
@@ -6,9 +6,7 @@ import (
 	"net/http"
 	"net/url"
 	"regexp"
-
-	"github.com/robertkrimen/otto"
-	"github.com/tidwall/gjson"
+	"strings"
 )
 
 type googleTranslator struct{}
@@ -25,132 +23,29 @@ func GoogleTranslate(ctx context.Context, req Request) *Response {
 
 func (g *googleTranslator) translate(ctx context.Context, req Request) (resp *Response) {
 	resp = newResp(g)
-	_, data, err := sendRequest(ctx, http.MethodGet, "https://translate.google.cn", nil, nil)
-	if err != nil {
-		resp.Err = fmt.Errorf("readResp error: %v", err)
-		return
+	reqStr := fmt.Sprintf(`[[["MkEWBc","[[\"%s\",\"%s\",\"%s\",true],[null]]",null,"generic"]]]`, req.Text, "auto", req.ToLang)
+	param := url.Values{
+		"f.req": {reqStr},
 	}
-	vq, err := g.getVq(string(data))
-	if err != nil {
-		resp.Err = fmt.Errorf("getVq error: %v", err)
-		return
-	}
-	tk, err := g.calTK(vq, req.Text)
-	if err != nil {
-		resp.Err = fmt.Errorf("calTK error: %v", err)
-		return
-	}
-
-	u, _ := url.Parse("https://translate.google.cn/translate_a/single")
-	param := u.Query()
-	param.Set("client", "t")
-	param.Set("sl", "auto")
-	param.Set("hl", "zh-CN")
-	param.Set("tl", req.ToLang)
-	param.Set("dt", "t")
-	param.Set("ie", "UTF-8")
-	param.Set("oe", "UTF-8")
-	param.Set("source", "btn")
-	param.Set("ssel", "3")
-	param.Set("tsel", "3")
-	param.Set("kc", "0")
-	param.Set("tk", tk)
-	param.Set("q", req.Text)
-	u.RawQuery = param.Encode()
+	body := strings.NewReader(param.Encode())
 
-	_, data, err = sendRequest(ctx, "GET", u.String(), nil, func(r *http.Request) error {
-		r.Header.Set("User-Agent", "Paw/3.1.5 (Macintosh; OS X/10.13.2) GCDHTTPRequest")
+	_, data, err := sendRequest(ctx, "POST", "https://translate.google.cn/_/TranslateWebserverUi/data/batchexecute", body, func(r *http.Request) error {
+		r.Header.Set("user-agent", UserAgent)
+		r.Header.Set("content-type", "application/x-www-form-urlencoded;charset=UTF-8")
 		return nil
 	})
 	if err != nil {
 		resp.Err = fmt.Errorf("sendRequest error: %v", err)
 		return
 	}
-
-	jr := gjson.Parse(string(data))
-	if !jr.Get("..0.0.0").Exists() {
-		resp.Err = fmt.Errorf("cannot get google translate result")
-		return
-	}
-	jsonResult := jr.Get("..0.0").Array()
-	for _, r := range jsonResult {
-		resp.Result += r.Get("..0.0").String()
-	}
-
+	resp.Result, resp.Err = g.getResult(string(data))
 	return
 }
 
-const (
-	googleSignJS = `
-  var Tq = function(a) {
-	        return function() {
-	            return a
-	        }
-	    },
-	    Uq = function(a, b) {
-	        for (var c = 0; c < b.length - 2; c += 3) {
-	            var d = b.charAt(c + 2);
-	            d = "a" <= d ? d.charCodeAt(0) - 87 : Number(d);
-	            d = "+" == b.charAt(c + 1) ? a >>> d : a << d;
-	            a = "+" == b.charAt(c) ? a + d & 4294967295 : a ^ d
-	        }
-	        return a
-	    },
-	    Wq = function(a) {
-	        var b = Vq;
-	        var d = Tq(String.fromCharCode(116));
-	        c = Tq(String.fromCharCode(107));
-	        d = [d(), d()];
-	        d[1] = c();
-	        d = b.split(".");
-	        b = Number(d[0]) || 0;
-	        for (var e = [], f = 0, g = 0; g < a.length; g++) {
-	            var l = a.charCodeAt(g);
-	            128 > l ? e[f++] = l : (2048 > l ? e[f++] = l >> 6 | 192 : (55296 == (l & 64512) && g + 1 < a.length && 56320 == (a.charCodeAt(g + 1) & 64512) ? (l = 65536 + ((l & 1023) << 10) + (a.charCodeAt(++g) & 1023),
-	                        e[f++] = l >> 18 | 240,
-	                        e[f++] = l >> 12 & 63 | 128) : e[f++] = l >> 12 | 224,
-	                    e[f++] = l >> 6 & 63 | 128),
-	                e[f++] = l & 63 | 128)
-	        }
-	        a = b;
-	        for (f = 0; f < e.length; f++)
-	            a += e[f],
-	            a = Uq(a, "+-a^+6");
-	        a = Uq(a, "+-3^+b+-f");
-	        a ^= Number(d[1]) || 0;
-	        0 > a && (a = (a & 2147483647) + 2147483648);
-	        a %= 1E6;
-	        return a.toString() + "." + (a ^ b)
-	    };
-	result = Wq(query)
-	`
-)
-
-func (*googleTranslator) calTK(vq, query string) (string, error) {
-	vm := otto.New()
-	if err := vm.Set("Vq", vq); err != nil {
-		return "", fmt.Errorf("vm.Set Vq error: %v", err)
-	}
-	if err := vm.Set("query", query); err != nil {
-		return "", fmt.Errorf("vm.Set query error: %v", err)
-	}
-	value, err := vm.Run(googleSignJS)
-	if err != nil {
-		return "", fmt.Errorf("vm.Run error: %v", err)
-	}
-	return value.String(), nil
-}
-
-func (*googleTranslator) getVq(dataStr string) (string, error) {
-	//dataStr = `LOW_CONFIDENCE_THRESHOLD=-1;MAX_ALTERNATIVES_ROUNDTRIP_RESULTS=1;TKK=eval('((function(){var a\x3d1966732470;var b\x3d1714107181;return 423123+\x27.\x27+(a+b)})())');VERSION_LABEL = 'twsfe_w_20180402_RC00';`
-	vqResult := regexp.MustCompile(`tkk:'(?P<vq>[\s\S]+)',experiment_ids`).FindStringSubmatch(dataStr)
-	if len(vqResult) != 2 {
-		return "", fmt.Errorf("cannot get vq")
-	}
-	vm := otto.New()
-	value, err := vm.Run(vqResult[1])
-	if err != nil {
-		return "", fmt.Errorf("vm.Run error: %v", err)
+func (g *googleTranslator) getResult(dataStr string) (string, error) {
+	result := regexp.MustCompile(`(?U),null,null,null,\[\[\\"(?P<result>\S+)\\",\[\\"`).FindStringSubmatch(dataStr)
+	if len(result) != 2 {
+		return "", fmt.Errorf("cannot get result")
 	}
-	return value.String(), nil
+	return result[1], nil
 }