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84 lines
2.1 KiB
84 lines
2.1 KiB
'use strict';
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var util = require('util');
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var debug = require('debug')('urllib');
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var ms = require('humanize-ms');
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var HttpClient = require('./httpclient');
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var _Promise;
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module.exports = HttpClient2;
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function HttpClient2(options) {
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HttpClient.call(this, options);
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}
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util.inherits(HttpClient2, HttpClient);
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HttpClient2.prototype.request = HttpClient2.prototype.curl = function request(url, args) {
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var self = this;
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args = args || {};
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args.retry = args.retry || 0;
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if (args.retryDelay) {
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args.retryDelay = ms(args.retryDelay);
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}
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args.isRetry = args.isRetry || function(res) {
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return res.status >= 500;
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};
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return HttpClient.prototype.request.call(self, url, args)
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.then(function(res) {
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if (args.retry > 0 && typeof args.isRetry === 'function' && args.isRetry(res)) {
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args.retry--;
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debug('retry request %s, remain %s', url, args.retry);
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if (args.retryDelay) {
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debug('retry after %sms', args.retryDelay);
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return sleep(args.retryDelay).then(function() { return self.request(url, args); });
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}
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return self.request(url, args);
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}
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return res;
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})
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.catch(function(err) {
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if (args.retry > 0) {
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args.retry--;
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debug('retry request %s, remain %s, err %s', url, args.retry, err);
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if (args.retryDelay) {
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debug('retry after %sms', args.retryDelay);
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return sleep(args.retryDelay).then(function() { return self.request(url, args); });
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}
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return self.request(url, args);
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}
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throw err;
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});
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};
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HttpClient2.prototype.requestThunk = function requestThunk(url, args) {
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var self = this;
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return function(callback) {
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self.request(url, args)
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.then(function(res) {
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var cb = callback;
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// make sure cb(null, res) throw error won't emit catch callback below
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callback = null;
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cb(null, res);
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})
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.catch(function(err) {
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if (!callback) {
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// TODO: how to handle this error?
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return;
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}
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callback(err);
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});
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};
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};
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function sleep(ms) {
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if (!_Promise) {
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_Promise = require('any-promise');
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}
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return new _Promise(function(resolve) {
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setTimeout(resolve, ms);
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});
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}
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