partner-fm.js
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var xml2js = require('xml2js');
var request = require('request');
var http = require('http');
var redis = require('redis');
var resendDelay = require('sate24/resend-delay.js');
var LRU = require('lru-cache');
var aaa;
var _callbackReport;
var config;
var logger;
var redisClient;
var xmlBuilder = new xml2js.Builder();
var taskHistory = LRU({max: 500, maxAge: 1000 * 3600 * 2});
var alreadyPending = LRU({max: 500, maxAge: 1000 * 3600 * 2});
function start(options) {
if (!options) {
console.log('Undefined options, terminating....');
process.exit(1);
}
if (options.config) {
config = options.config;
} else {
console.log('Undefined options.config, terminating....')
process.exit(1);
}
if (options.aaa) {
aaa = options.aaa;
_callbackReport = options.aaa.callbackReportWithPushToMongoDb;
} else {
console.log('Undefined options.aaa, terminating....')
process.exit(1);
}
if (options && options.logger) {
logger = options.logger;
} else {
console.log('Undefined options.logger, terminating....')
process.exit(1);
}
createRedisClient(config.globals.redis_host, config.globals.redis_port);
createServer();
resendDelay.init({
config: config,
topupRequest: topupStatus,
logger: logger
});
}
function topupRequest(task) {
aaa.insertTaskToMongoDb(task);
alreadyPending.del(task.requestId);
getTaskFromHistory(task, function(err, archivedTask) {
putTaskToHistory(task);
if (archivedTask) {
logger.info('Task has been executed before, going to checkStatus', {task: task, archivedTask: archivedTask});
topupStatus(task);
} else {
_topupRequest(task);
}
});
}
function _topupRequest(task) {
var payload = composeTopupMessage(
config.h2h_out.pin,
task.remoteProduct,
task.destination,
task.requestId
);
var reqOpts = {
url: config.h2h_out.partner,
method: "POST",
body: payload,
headers: {
'Content-Type': 'text/xml',
}
};
logger.verbose('Requesting TOPUP to partner', {reqOpts: reqOpts});
request(reqOpts, function (err, response, body) {
if (err) {
var msg = 'Error requesting TOPUP to partner: ' + err;
var rc = '68';
if (err.code == 'ECONNREFUSED') {
rc = '91';
}
logger.warn(msg, {task: task, err: err});
callbackReport(task.requestId, rc, msg);
return;
}
logger.verbose('Got a direct response from TOPUP', {response: body, task: task});
topupResponseHandler(body, task.requestId, callbackReport);
});
}
function topupStatus(task) {
var payload = composeTopupStatusMessage(
config.h2h_out.pin,
task.requestId
);
var reqOpts = {
url: config.h2h_out.partner,
method: "POST",
body: payload,
headers: {
'Content-Type': 'text/xml',
}
};
logger.verbose('Requesting TOPUPSTATUS to partner', {reqOpts: reqOpts});
request(reqOpts, function (err, response, body) {
if (err) {
var msg = 'Error requesting TOPUPSTATUS to partner: ' + err;
logger.warn(msg, {task: task, err: err});
callbackReport(task.requestId, '68', msg);
return;
}
logger.verbose('Got a direct response from TOPUPSTATUS', {response: body, task: task});
topupResponseHandler(body, task.requestId, callbackReport);
});
}
function topupResponseHandler(xmlResponse, _requestId, cb) {
var xmlParser = xml2js.parseString;
xmlParser(xmlResponse, function(err, data) {
var msg;
var requestId;
var rc = '68';
if (_requestId) {
requestId = _requestId;
}
if (err) {
msg = 'Error parsing xml response: ' + err;
if (logger) {
logger.warn(msg, {err: err, response: xmlResponse, task: task});
} else {
console.log(msg);
}
} else {
logger.info('Response parsed', {data: data});
msg = getMessageFromResponse(data);
if (!msg) {
msg = 'Unknown message';
}
var status = getStatusFromResponse(data);
if (status == '0') {
rc = '00';
msg = modifyMessageWithSn(msg);
logger.verbose('Modify message on success message', {msg: msg});
} else if (status == '1') {
rc = '68';
} else if (status == '2') {
rc = '40';
} else if (status == '3') {
rc = '40';
} else {
rc = '68';
msg = msg + '. Status is not valid ' + status;
}
var requestIdFromData = getRequestIdFromResponse(data);
if (requestIdFromData) {
requestId = requestIdFromData;
}
}
cb(requestId, rc, msg, xmlResponse)
});
}
function callbackReport(requestId, responseCode, msg, rawResponse, dontResendDelay) {
if (!requestId) {
logger.warn('Undefined requestId, not sending callbackReport', {rc: responseCode, msg: msg, rawResponse: rawResponse});
return;
}
if (responseCode != '68' || dontResendDelay) {
resendDelay.cancel(requestId);
} else {
getTaskFromHistory(requestId, function(err, archivedTask) {
if (archivedTask) {
resendDelay.register(archivedTask);
}
});
}
if (!alreadyPending.get(requestId) || responseCode != '68') {
var responseObject = {
parsed: {
MESSAGE: msg
},
raw: rawResponse
}
_callbackReport(requestId, responseCode, msg, null, responseObject);
}
alreadyPending.set(requestId, '68');
}
function getSnFromMessage(msg) {
try {
var matches = msg.match(/SN:\s*(\d+)/);
return matches[1];
}
catch(e) {
return;
}
}
function getStatusFromResponse(data) {
try {
return data.fm.status[0];
}
catch(e) {
logger.warn('Exception on getStatusFromResponse: ' + e);
return;
}
}
function getMessageFromResponse(data) {
try {
return data.fm.message[0];
}
catch(e) {
logger.warn('Exception on getMessageFromResponse: ' + e);
return;
}
}
function getRequestIdFromResponse(data) {
try {
return data.fm.refTrxid[0];
}
catch(e) {
return;
}
}
function modifyMessageWithSn(msg) {
var sn = getSnFromMessage(msg);
if (sn) {
msg = 'SN=' + sn + '; ' + msg;
}
return msg;
}
function composeTopupMessage(pin, product, destination, requestId) {
var data = {fm: {
command: 'TOPUP',
pin: pin,
product: product,
msisdn: destination,
refTrxid: requestId
}};
return xmlBuilder.buildObject(data);
}
function composeTopupStatusMessage(pin, requestId) {
var data = {fm: {
command: 'TOPUPSTATUS',
pin: pin,
refTrxid: requestId
}}
return xmlBuilder.buildObject(data);
}
function createServer() {
var httpServer = http.createServer(function(request, response) {
logger.info('Got request from partner');
var body = "";
request.on('data', function (chunk) {
body += chunk;
});
request.on('end', function () {
response.writeHead(200);
response.end('OK');
topupResponseHandler(body, null, callbackReport);
});
});
httpServer.listen(config.h2h_out.listen_port, function() {
logger.info('HTTP Reverse/Report server listen on port ' + config.h2h_out.listen_port);
});
}
function createRedisClient(host, port) {
if (!host && !port) {
logger.info('Not creating redis client because unspecified host or port');
return;
}
try {
redisClient = redis.createClient(port, host);
} catch(err) {
logger.warn("Error creating redis client to " + host + ':' + port);
}
}
function getTaskKey(task, chipInfo) {
var requestId;
if (typeof task === 'string') {
requestId = task;
} else {
try {
requestId = task.requestId;
}
catch(e) {
logger.warn('Something wrong', {task: task});
console.trace('Cekidot');
process.exit(1);
}
}
if (!chipInfo && config && config.globals && config.globals.gateway_name) {
chipInfo = config.globals.gateway_name;
}
return chipInfo + '.hitachi.rid:' + requestId;
}
function putTaskToHistory(task, cb) {
if (Number(config.globals.no_dupe_check)) {
if (cb) { cb(); }
return;
}
var key = getTaskKey(task, config.globals.gateway_name);
logger.verbose('Saving task to history LRU', {key: key, task: task});
try {
taskHistory.set(key, JSON.parse(JSON.stringify(task)));
} catch (e) { }
putTaskToRedis(task, cb);
}
function putTaskToRedis(task, cb) {
if (!redisClient) {
logger.verbose('Not saving to redis because of undefined redisClient')
if (cb) { cb(); }
return;
}
var key = getTaskKey(task, config.globals.gateway_name);
logger.verbose('Saving task to redis', {key: key, task: task});
redisClient.set(key, JSON.stringify(task), function() {
redisClient.expire(key, 3600*24*30);
if (cb) {
cb();
}
});
}
function getTaskFromHistory(task, cb) {
logger.verbose('Getting task from history', {task: task});
var key = getTaskKey(task, config.globals.gateway_name);
var archive = taskHistory.get(key);
if (archive) {
if (cb) { cb(null, archive); }
}
else {
getTaskFromRedis(task, cb);
}
}
function getTaskFromRedis(task, cb) {
if (!redisClient) {
if (cb) { cb(null, null); }
return;
}
var key = getTaskKey(task, config.globals.gateway_name);
redisClient.get(key, function(err, result) {
if (err) {
logger.warn('Error retrieving task from redis', {err: err});
cb(err, null);
return;
}
var task;
try {
task = JSON.parse(result);
}
catch(e) {
logger.warn('Exception on parsing redis result as a json', {err: e});
}
cb(null, task);
})
}
exports.start = start;
exports.topupRequest = topupRequest;
exports.composeTopupMessage = composeTopupMessage;
exports.getSnFromMessage = getSnFromMessage;
exports.modifyMessageWithSn = modifyMessageWithSn;