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gTTS.js
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/
gTTS.js
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const request = require('request');
const escapeStringRegexp = require('escape-string-regexp');
const gToken = require('./gToken');
const async = require('async');
const fs = require('fs');
const MultiStream = require('multistream');
function gTTS(text, lang, debug) {
lang = lang || 'en';
debug = debug || false;
var text_parts = [];
this.GOOGLE_TTS_URL = 'https://translate.google.com/translate_tts';
this.MAX_CHARS = 100;
this.LANGUAGES = {
'af': 'Afrikaans',
'sq': 'Albanian',
'ar': 'Arabic',
'hy': 'Armenian',
'ca': 'Catalan',
'zh': 'Chinese',
'zh-cn': 'Chinese (Mandarin/China)',
'zh-tw': 'Chinese (Mandarin/Taiwan)',
'zh-yue': 'Chinese (Cantonese)',
'hr': 'Croatian',
'cs': 'Czech',
'da': 'Danish',
'nl': 'Dutch',
'en': 'English',
'en-au': 'English (Australia)',
'en-uk': 'English (United Kingdom)',
'en-us': 'English (United States)',
'eo': 'Esperanto',
'fi': 'Finnish',
'fr': 'French',
'de': 'German',
'el': 'Greek',
'ht': 'Haitian Creole',
'hi': 'Hindi',
'hu': 'Hungarian',
'is': 'Icelandic',
'id': 'Indonesian',
'it': 'Italian',
'ja': 'Japanese',
'ko': 'Korean',
'la': 'Latin',
'lv': 'Latvian',
'mk': 'Macedonian',
'no': 'Norwegian',
'pl': 'Polish',
'pt': 'Portuguese',
'pt-br': 'Portuguese (Brazil)',
'ro': 'Romanian',
'ru': 'Russian',
'sr': 'Serbian',
'sk': 'Slovak',
'es': 'Spanish',
'es-es': 'Spanish (Spain)',
'es-us': 'Spanish (United States)',
'sw': 'Swahili',
'sv': 'Swedish',
'ta': 'Tamil',
'th': 'Thai',
'tr': 'Turkish',
'vi': 'Vietnamese',
'cy': 'Welsh'
}
this.debug = debug;
if (!this.LANGUAGES[lang.toLowerCase()])
throw new Error('Language not supported: ' + lang);
else
this.lang = lang.toLowerCase();
if (!text)
throw new Error('No text to speak');
else
this.text = text
if (text.length <= this.MAX_CHARS)
text_parts = [text]
else
text_parts = this._tokenize(text, this.MAX_CHARS);
// Clean
text_parts = text_parts.map(function (p) {
return p.replace(/\\n/g, '').trim()
});
text_parts = text_parts.filter(function (p) {
return p.length > 0;
});
this.text_parts = text_parts;
this.token = gToken;
return this;
}
gTTS.prototype.getHeader = function () {
return {
"Referer" : "http://translate.google.com/",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36"
};
}
gTTS.prototype.getPayload = function (part, idx) {
var self = this;
return {
'ie' : 'UTF-8',
'q' : part,
'tl' : self.lang,
'total' : self.text_parts.length,
'idx' : idx,
'client' : 'tw-ob',
'textlen' : part.length,
'tk' : self.token(part)
};
}
gTTS.prototype.stream = function () {
var self = this;
return MultiStream(this.text_parts.map(function (part, idx) {
var headers = self.getHeader();
var payload = self.getPayload(part, idx);
if (self.debug) {
console.log(payload);
}
return request({
uri: self.GOOGLE_TTS_URL,
headers: headers,
qs: payload,
method: 'GET'
});
}));
}
gTTS.prototype.save = function (save_file, callback) {
var self = this;
async.eachSeries(self.text_parts, function (part, cb) {
var idx = self.text_parts.indexOf(part);
var headers = self.getHeader();
var payload = self.getPayload(part, idx);
if (self.debug) {
console.log(payload);
}
var writeStream = fs.createWriteStream(save_file, { flags: idx > 0 ? 'a' : 'w' });
request({
uri: self.GOOGLE_TTS_URL,
headers: headers,
qs: payload,
method: 'GET'
})
.pipe(writeStream);
writeStream.on('finish', cb);
writeStream.on('error', cb);
}, callback);
}
gTTS.prototype._tokenize = function (text, max_size) {
var self = this;
var punc = '¡!()[]¿?.,;:—«»\n';
var punc_list = punc.split('').map(function (char) {
return escapeStringRegexp(char);
});
var pattern = punc_list.join('|');
var parts = text.split(new RegExp(pattern));
var min_parts = [];
for (var i=0; i<parts.length; i++) {
min_parts = min_parts.concat(self._minimize(parts[i], ' ', max_size));
}
return min_parts;
}
gTTS.prototype._minimize = function (thestring, delim, max_size) {
var self = this, idx;
var result = [];
if (thestring.length > max_size) {
idx = thestring.lastIndexOf(delim);
return result.concat([thestring.substring(0, idx)], self._minimize(thestring.substring(idx, thestring.length), delim));
} else {
return [thestring];
}
}
module.exports = gTTS;