kws-sdk/index.js

"use strict";
const querystring = require("querystring");
const aws = require("aws4");
const request = require("request-promise");
function buildBody(body) {
    if (!body) {
        return '';
    }
    return JSON.stringify(body);
}
function buildAWSPath(query = {}) {
    const keys = Object.keys(query);
    if (keys.length === 0) {
        return '/';
    }
    return '/?' + querystring.stringify(query);
}
class KWS {
    constructor(args) {
        Object.assign(this, args);
        if (!this.region) {
            this.region = 'cn-beijing-6';
        }
    }
    buildHost(service) {
        return this.host || `${service}.${this.region}.api.ksyun.com`;
    }
    buildAWSRequest(method, service, query, body) {
        return {
            host: this.buildHost(service),
            method,
            service,
            headers: {},
            region: this.region,
            path: buildAWSPath(query),
            body,
            signQuery: true
        };
    }
    buildAWSCredentials() {
        return {
            accessKeyId: this.ak,
            secretAccessKey: this.sk
        };
    }
    buildQuery(action, version, query) {
        return Object.assign({
            Action: action,
            Version: version,
            App: this.app,
            UniqName: this.uniqname
        }, query);
    }
    sign(method, api, data = {}) {
        data.query = data.query || {};
        const body = buildBody(data.body);
        const query = this.buildQuery(api.action, api.version, data.query);
        const AWSRequest = this.buildAWSRequest(method, api.service, query, body);
        const AWSCredentials = this.buildAWSCredentials();
        return aws.sign(AWSRequest, AWSCredentials);
    }
    request(method, api, data = {}) {
        const sign = this.sign(method, api, data);
        const option = {
            uri: `https://${sign.host}${sign.path}`,
            method: method,
            headers: sign.headers,
            body: ''
        };
        if (data.body) {
            option.method = 'POST';
            option.body = JSON.stringify(data.body);
        }
        else {
            delete option.body;
        }
        return request(option);
    }
}
module.exports = KWS;
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