58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
var _ = require('lodash');
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var async = require('async');
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var $ = require('preconditions').singleton();
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var log = require('npmlog');
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log.debug = log.verbose;
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/**
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* Query a server, using one of the given options
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*
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* @param {Object} opts
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* @param {Array} opts.hosts Array of hosts to query. Until the first success one.
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* @param {Array} opts.path Path to request in each server
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*/
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var requestList = function(args, cb) {
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$.checkArgument(args.hosts);
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request = args.request || require('request');
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if (!_.isArray(args.hosts))
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args.hosts = [args.hosts];
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var urls = _.map(args.hosts, function(x) {
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return (x + args.path);
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});
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var nextUrl, result, success;
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async.whilst(
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function() {
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nextUrl = urls.shift();
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return nextUrl && !success;
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},
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function(a_cb) {
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args.uri = nextUrl;
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request(args, function(err, res, body) {
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if (err) {
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log.warn('REQUEST FAIL: ' + nextUrl + ' ERROR: ' + err);
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}
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if (res) {
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success = !!res.statusCode.toString().match(/^[1234]../);
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if (!success) {
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log.warn('REQUEST FAIL: ' + nextUrl + ' STATUS CODE: ' + res.statusCode);
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}
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}
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result = [err, res, body];
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return a_cb();
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});
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},
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function(err) {
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if (err) return cb(err);
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return cb(result[0], result[1], result[2]);
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}
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);
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};
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module.exports = requestList;
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