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PollyTTS.js
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PollyTTS.js
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/*jshint esversion: 9 */
const https = require("https"),
querystring = require("querystring"),
aws4 = require("aws4");
class PollyTTS {
constructor(credentials) {
this.credentials = credentials;
}
async describeVoices() {
return new Promise((resolve, reject) => {
let options = {};
let opts = {
service: "polly",
region: options.region || "eu-west-1",
path: "/v1/voices?",
signQuery: true
};
// you can also pass AWS credentials in explicitly (otherwise taken from process.env)
aws4.sign(opts, this.credentials);
https.get(opts, res => {
if (res.statusCode !== 200) {
reject(`Request Failed. Status Code: ${res.statusCode}`);
}
else {
let body = "";
res.on("data", (chunk) => {
body += chunk;
});
res.on("end", () => {
try {
let json = JSON.parse(body);
resolve(json);
// do something with JSON
} catch (error) {
reject(error.message);
};
});
}
})
.on("error", reject);
})
}
async textToSpeech(options) {
return new Promise((resolve, reject) => {
if (!options) {
reject("Options are missing");
return;
}
let qs = {
Text: options.text,
TextType: options.textType || "text",
VoiceId: options.voiceId || "Vicki",
SampleRate: options.sampleRate || 22050,
OutputFormat: options.outputFormat || "mp3"
};
let opts = {
service: "polly",
region: options.region || "eu-west-1",
path: "/v1/speech?" + querystring.stringify(qs),
signQuery: true
};
// you can also pass AWS credentials in explicitly (otherwise taken from process.env)
aws4.sign(opts, this.credentials);
https.get(opts, res => {
if (res.statusCode !== 200) {
reject(`Request Failed. Status Code: ${res.statusCode}`);
}
else {
resolve(res);
}
})
.on("error", reject);
})
}
}
module.exports = PollyTTS;