google-trans-api
Version:
use puppeteer to get google translate api
413 lines (412 loc) • 19.4 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var util_1 = require("./util");
var puppeteer = require("puppeteer");
var os = require("os");
var url = require('url');
var platform = os.platform();
var instanceId = 1;
var repairing = false;
var sourceResultsMap = {};
var OVERLOAD = 1000;
var QUERY_MSG_EMPTY = 1001;
var SOURCE_ELEMENT_GET_ERROR = 1002;
var OVER_TIME = 1003;
var Trans = /** @class */ (function () {
function Trans(options) {
var _this = this;
// chrome instance pool
this.chromePool = [];
// Trans instance options
this.options = {
worker: 2,
responseCb: function (response) { return __awaiter(_this, void 0, void 0, function () {
var url, status_1, text, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
url = response.url();
console.log("[info] intercept url " + url);
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
status_1 = response.status();
return [4 /*yield*/, response.text()];
case 2:
text = _a.sent();
console.log("[info] status=>" + status_1 + " text=>" + text);
return [3 /*break*/, 4];
case 3:
err_1 = _a.sent();
console.log("[error] " + err_1.message);
return [3 /*break*/, 4];
case 4: return [2 /*return*/, Promise.resolve("")];
}
});
}); },
regExpIncludeUrl: function (url) {
var reg = new RegExp("translate.google.cn/translate_a/single.*?q=.*");
return reg.test(url);
},
transPageUrl: "https://translate.google.cn/#auto/zh-CN",
handles: true,
executablePath: "",
proxyServer: "",
initPageTimeout: 0,
maxTimesInstance: 200,
};
this.options = Object.assign(this.options, options);
}
/**
* get param q from original url
*
* @param urlStr
*/
Trans.prototype.getQueryFromUrl = function (urlStr) {
var query = url.parse(urlStr, true).query;
var q = query.q || "";
return q;
};
Trans.prototype.createPuppeteerInstance = function () {
return __awaiter(this, void 0, void 0, function () {
var args, browser, page, pageWrap, opt;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
args = [
"--no-sandbox",
"--disable-setuid-sandbox",
];
if (this.options.proxyServer) {
args.push(this.options.proxyServer);
}
return [4 /*yield*/, puppeteer.launch({
headless: this.options.handles,
executablePath: this.options.executablePath,
args: args
})];
case 1:
browser = _a.sent();
return [4 /*yield*/, browser.newPage()];
case 2:
page = _a.sent();
pageWrap = {
page: page,
times: 0,
browser: browser,
instanceId: instanceId++
};
page.from = pageWrap;
page.on('response', function (response) { return __awaiter(_this, void 0, void 0, function () {
var url, q, ret;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
url = response.url();
util_1.log("[info] request url " + url);
if (this.options.regExpIncludeUrl &&
typeof (this.options.regExpIncludeUrl) === "function" &&
!this.options.regExpIncludeUrl(url)) {
return [2 /*return*/, true];
}
q = this.getQueryFromUrl(url);
if (!q) {
return [2 /*return*/, true];
}
return [4 /*yield*/, this.options.responseCb(response)];
case 1:
ret = (_a.sent()) || "";
// save to the global var, ret is result, new Date is the record date, to clear
sourceResultsMap[q] = [ret, new Date()];
return [2 /*return*/];
}
});
}); });
if (!this.options.transPageUrl) return [3 /*break*/, 4];
opt = {
waitUntil: "domcontentloaded"
};
if (this.options.initPageTimeout) {
opt.timeout = this.options.initPageTimeout;
}
return [4 /*yield*/, page.goto(this.options.transPageUrl, opt)];
case 3:
_a.sent();
_a.label = 4;
case 4:
util_1.log('[info]', 'create puppeteer instance', 'instanceid is', pageWrap.instanceId);
return [2 /*return*/, Promise.resolve(pageWrap)];
}
});
});
};
// init puppeteer instance pool
Trans.prototype.init = function () {
return __awaiter(this, void 0, void 0, function () {
var i, pageObj, e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 5, , 6]);
i = 0;
_a.label = 1;
case 1:
if (!(i < this.options.worker)) return [3 /*break*/, 4];
return [4 /*yield*/, this.createPuppeteerInstance()];
case 2:
pageObj = _a.sent();
this.chromePool.push(pageObj);
_a.label = 3;
case 3:
i++;
return [3 /*break*/, 1];
case 4: return [3 /*break*/, 6];
case 5:
e_1 = _a.sent();
console.log("[error] when init");
return [2 /*return*/, Promise.resolve(-1)];
case 6: return [2 /*return*/, Promise.resolve(0)];
}
});
});
};
// clear google trans page
Trans.prototype.clear = function (page) {
return __awaiter(this, void 0, void 0, function () {
var source, e_2;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 10, , 11]);
page.trans = "";
page.msg = "";
return [4 /*yield*/, page.$("#source")];
case 1:
source = _a.sent();
if (!source) return [3 /*break*/, 9];
if (!(platform == "darwin")) return [3 /*break*/, 4];
return [4 /*yield*/, source.click({ clickCount: 3 })];
case 2:
_a.sent();
return [4 /*yield*/, page.keyboard.press("Backspace")];
case 3:
_a.sent();
return [3 /*break*/, 9];
case 4: return [4 /*yield*/, page.keyboard.down('Control')];
case 5:
_a.sent();
return [4 /*yield*/, page.keyboard.press('KeyA')];
case 6:
_a.sent();
return [4 /*yield*/, page.keyboard.up('Control')];
case 7:
_a.sent();
return [4 /*yield*/, page.keyboard.press("Backspace")];
case 8:
_a.sent();
_a.label = 9;
case 9:
page.from && console.timeEnd(page.from.times + " >>");
return [3 /*break*/, 11];
case 10:
e_2 = _a.sent();
console.log("[error] when clear");
return [3 /*break*/, 11];
case 11: return [2 /*return*/];
}
});
});
};
Trans.prototype.recyclePageObj = function (pageObj) {
return __awaiter(this, void 0, void 0, function () {
var pageObjNew;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(pageObj.times > this.options.maxTimesInstance)) return [3 /*break*/, 2];
pageObj.browser.close();
return [4 /*yield*/, this.createPuppeteerInstance()];
case 1:
pageObjNew = _a.sent();
this.chromePool.unshift(pageObjNew);
return [3 /*break*/, 3];
case 2:
this.chromePool.unshift(pageObj);
_a.label = 3;
case 3: return [2 /*return*/];
}
});
});
};
/**
* supplement puppeteer instance when not enough
*/
Trans.prototype.dynamicRepair = function () {
return __awaiter(this, void 0, void 0, function () {
var instance;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(this.options.worker > this.chromePool.length)) return [3 /*break*/, 2];
return [4 /*yield*/, this.createPuppeteerInstance()];
case 1:
instance = _a.sent();
this.chromePool.unshift(instance);
return [3 /*break*/, 0];
case 2: return [2 /*return*/];
}
});
});
};
/**
* trans func, called by api
*
* @param msg
*/
Trans.prototype.trans = function (msg) {
return __awaiter(this, void 0, void 0, function () {
var pageObj, page, source, times, result, e_3, message, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
pageObj = this.chromePool.pop();
_b.label = 1;
case 1:
_b.trys.push([1, 14, , 22]);
if (!!pageObj) return [3 /*break*/, 4];
if (!!repairing) return [3 /*break*/, 3];
repairing = true;
return [4 /*yield*/, this.dynamicRepair()];
case 2:
_b.sent();
repairing = false;
_b.label = 3;
case 3: throw OVERLOAD;
case 4:
util_1.log('[info]', 'get instance[', pageObj.instanceId, '] runing times[', pageObj.times, ']');
pageObj.times++;
console.time(pageObj.times + " >>");
console.log(pageObj.times + " >>" + ("\u5F00\u59CB\u7FFB\u8BD1\uFF1A" + msg));
msg = msg.trim();
if (platform == "darwin") {
msg = msg.replace(/(\n)/g, "");
}
console.log(pageObj.times + " >>" + ("\u683C\u5F0F\u5316\u4E4B\u540E\uFF1A" + msg));
if (!msg) {
throw QUERY_MSG_EMPTY;
}
page = pageObj.page;
// type source info to the textarea
return [4 /*yield*/, page.waitFor("#source")];
case 5:
// type source info to the textarea
_b.sent();
return [4 /*yield*/, page.$("#source")];
case 6:
source = _b.sent();
if (!source) {
throw SOURCE_ELEMENT_GET_ERROR;
}
source.focus();
return [4 /*yield*/, page.keyboard.type(msg)
// wait for result or error
];
case 7:
_b.sent();
times = 0;
_b.label = 8;
case 8:
if (!true) return [3 /*break*/, 13];
console.log(pageObj.times + " >>" + new Date());
return [4 /*yield*/, util_1.sleep(300)];
case 9:
_b.sent();
if (!sourceResultsMap[msg]) return [3 /*break*/, 12];
result = sourceResultsMap[msg][0];
console.log(pageObj.times + " >>" + "翻译结果：" + result);
delete sourceResultsMap[msg];
return [4 /*yield*/, this.clear(page)];
case 10:
_b.sent();
return [4 /*yield*/, this.recyclePageObj(pageObj)];
case 11:
_b.sent();
return [2 /*return*/, Promise.resolve(result)];
case 12:
times++;
if (times >= 50) {
throw OVER_TIME;
}
return [3 /*break*/, 8];
case 13: return [3 /*break*/, 22];
case 14:
e_3 = _b.sent();
message = e_3.message;
_a = message;
switch (_a) {
case OVERLOAD: return [3 /*break*/, 15];
case QUERY_MSG_EMPTY: return [3 /*break*/, 16];
case SOURCE_ELEMENT_GET_ERROR: return [3 /*break*/, 18];
case OVER_TIME: return [3 /*break*/, 19];
}
return [3 /*break*/, 20];
case 15: return [2 /*return*/, Promise.resolve(OVERLOAD)];
case 16: return [4 /*yield*/, this.recyclePageObj(pageObj)];
case 17:
_b.sent();
console.timeEnd(pageObj.times + " >>");
return [2 /*return*/, Promise.resolve(QUERY_MSG_EMPTY)];
case 18:
console.log(pageObj.times + " >>" + "\u83B7\u53D6\u5143\u7D20\u7126\u70B9\u5931\u8D25");
return [2 /*return*/, Promise.resolve(SOURCE_ELEMENT_GET_ERROR)];
case 19:
console.log(pageObj.times + " >>" + "翻译超时");
return [2 /*return*/, Promise.resolve('')];
case 20:
util_1.log("[error]", pageObj.instanceId, e_3);
return [2 /*return*/, Promise.resolve('')];
case 21: return [3 /*break*/, 22];
case 22: return [2 /*return*/];
}
});
});
};
return Trans;
}());
exports.default = Trans;