sensecap/src/base/BaseRequest.js

## Install ``` npm install sensecap --save ```

var request = require('request');
// var Region = require('../sensecap');

var FastRateLimit = require("fast-ratelimit").FastRateLimit;
var logger = require('../utils/loggerUtil')
var messageLimiter = new FastRateLimit({
    threshold : 1, // available tokens over timespan
    ttl : 1  // time-to-live value of token bucket (in seconds)
});

function BaseRequest(options) {
    this.region = options.region;
    this.user = options.accessKeyId;
    this.password = options.accessKeySecret;
    switch (this.region) {
        // case Region.SENSECAP_CN:
        //     this.host = 'https://sensecap.seeed.cn/openapi';
        //     break;
        // case Region.SENSECAP_CC:
        //     this.host = 'https://sensecap.seeed.cc/openapi';
        //     break;
        // case Region.SENSECAP_DEV:
        //     this.host = 'http://sensecapv1.seeed.cc/openapi';
        //     break;
        case 1:
            this.host = 'https://sensecap.seeed.cn/openapi';
            break;
        case 2:
            this.host = 'https://sensecap.seeed.cc/openapi';
            break;
        case 3:
            this.host = 'http://sensecapv1.seeed.cc/openapi';
            break;
        default:
            this.host = 'https://sensecap.seeed.cn/openapi';
            break;
    }
}

BaseRequest.prototype = {
    get: function (url, qs, callback) {
        var that = this;
        if (messageLimiter.consumeSync(url)) {
            var time = new Date().valueOf();
            request({
                url: url,
                method: 'GET',
                baseUrl: this.host,
                json: true,
                headers: {
                    'content-type': 'application/x-www-form-urlencoded; charset=utf-8'
                },
                qs: qs,
                auth: {
                    user: this.user,
                    password: this.password
                }
            }, function (error, response, body) {
                logger.log(url + ' use time: ' + (new Date().valueOf() - time))
                callback(that.errorHandler(error, body), body)
            })
        } else {
            logger.warn('limit now, retry after 1s,' + url)
            setTimeout(function (){
                that.get(url, qs, callback)
            }, 1000)
        }
    },
    post: function (url, body, qs, callback) {
        var that = this;
        if (messageLimiter.consumeSync(url)) {
            var time = new Date().valueOf();
            request({
                url: url,
                method: 'POST',
                baseUrl: this.host,
                json: true,
                headers: {
                    'content-type': 'application/json; charset=utf-8'
                },
                body: body || {},
                qs: qs,
                auth: {
                    user: this.user,
                    password: this.password
                }
            },function (error, response, body) {
                logger.log(url + ' use time: ' + (new Date().valueOf() - time))
                callback(that.errorHandler(error, body), body)
            })
        } else {
            logger.warn('limit now, retry after 1s,' + url)
            setTimeout(function (){
                that.get(url, qs, callback)
            }, 1000)
        }
    },
    baseGet: function (url, callback) {
        var that = this;
        if (messageLimiter.consumeSync(url)) {
            var time = new Date().valueOf();
            request({
                url: url,
                method: 'GET',
                json: true,
                gzip: true,
                encoding: null, //设置encoding
            }, function (error, response, body) {
                logger.log(url + ' use time: ' + (new Date().valueOf() - time))
                callback(that.errorHandler(error, body), body)
            })
        } else {
            logger.warn('limit now, retry after 1s,' + url)
            setTimeout(function (){
                that.get(url, qs, callback)
            }, 1000)
        }
    },
    errorHandler: function(error, body) {
        var err
        if (error) {
            err = {}
            err.code = 400;
            err.msg = error.toString();
        } else {
            if (body && body.code != 0) {
                err = {}
                err.code = 500;
                err.msg =  body.msg + ',code: ' + body.code;
            }
        }
        // logger.log(err)
        return err;
    }
};

module.exports = BaseRequest;