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-rw-r--r--signaling-server/node_modules/redis/index.js1284
1 files changed, 1284 insertions, 0 deletions
diff --git a/signaling-server/node_modules/redis/index.js b/signaling-server/node_modules/redis/index.js
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+++ b/signaling-server/node_modules/redis/index.js
@@ -0,0 +1,1284 @@
+/*global Buffer require exports console setTimeout */
+
+var net = require("net"),
+ util = require("./lib/util"),
+ Queue = require("./lib/queue"),
+ to_array = require("./lib/to_array"),
+ events = require("events"),
+ crypto = require("crypto"),
+ parsers = [], commands,
+ connection_id = 0,
+ default_port = 6379,
+ default_host = "127.0.0.1";
+
+// can set this to true to enable for all connections
+exports.debug_mode = false;
+
+var arraySlice = Array.prototype.slice
+function trace() {
+ if (!exports.debug_mode) return;
+ console.log.apply(null, arraySlice.call(arguments))
+}
+
+// hiredis might not be installed
+try {
+ require("./lib/parser/hiredis");
+ parsers.push(require("./lib/parser/hiredis"));
+} catch (err) {
+ if (exports.debug_mode) {
+ console.warn("hiredis parser not installed.");
+ }
+}
+
+parsers.push(require("./lib/parser/javascript"));
+
+function RedisClient(stream, options) {
+ this.stream = stream;
+ this.options = options = options || {};
+
+ this.connection_id = ++connection_id;
+ this.connected = false;
+ this.ready = false;
+ this.connections = 0;
+ if (this.options.socket_nodelay === undefined) {
+ this.options.socket_nodelay = true;
+ }
+ if (this.options.socket_keepalive === undefined) {
+ this.options.socket_keepalive = true;
+ }
+ this.should_buffer = false;
+ this.command_queue_high_water = this.options.command_queue_high_water || 1000;
+ this.command_queue_low_water = this.options.command_queue_low_water || 0;
+ this.max_attempts = null;
+ if (options.max_attempts && !isNaN(options.max_attempts) && options.max_attempts > 0) {
+ this.max_attempts = +options.max_attempts;
+ }
+ this.command_queue = new Queue(); // holds sent commands to de-pipeline them
+ this.offline_queue = new Queue(); // holds commands issued but not able to be sent
+ this.commands_sent = 0;
+ this.connect_timeout = false;
+ if (options.connect_timeout && !isNaN(options.connect_timeout) && options.connect_timeout > 0) {
+ this.connect_timeout = +options.connect_timeout;
+ }
+ this.enable_offline_queue = true;
+ if (typeof this.options.enable_offline_queue === "boolean") {
+ this.enable_offline_queue = this.options.enable_offline_queue;
+ }
+ this.retry_max_delay = null;
+ if (options.retry_max_delay !== undefined && !isNaN(options.retry_max_delay) && options.retry_max_delay > 0) {
+ this.retry_max_delay = options.retry_max_delay;
+ }
+
+ this.initialize_retry_vars();
+ this.pub_sub_mode = false;
+ this.subscription_set = {};
+ this.monitoring = false;
+ this.closing = false;
+ this.server_info = {};
+ this.auth_pass = null;
+ if (options.auth_pass !== undefined) {
+ this.auth_pass = options.auth_pass;
+ }
+ this.parser_module = null;
+ this.selected_db = null; // save the selected db here, used when reconnecting
+
+ this.old_state = null;
+
+ this.install_stream_listeners();
+
+ events.EventEmitter.call(this);
+}
+util.inherits(RedisClient, events.EventEmitter);
+exports.RedisClient = RedisClient;
+
+RedisClient.prototype.install_stream_listeners = function() {
+ var self = this;
+
+ this.stream.on("connect", function () {
+ self.on_connect();
+ });
+
+ this.stream.on("data", function (buffer_from_socket) {
+ self.on_data(buffer_from_socket);
+ });
+
+ this.stream.on("error", function (msg) {
+ self.on_error(msg.message);
+ });
+
+ this.stream.on("close", function () {
+ self.connection_gone("close");
+ });
+
+ this.stream.on("end", function () {
+ self.connection_gone("end");
+ });
+
+ this.stream.on("drain", function () {
+ self.should_buffer = false;
+ self.emit("drain");
+ });
+};
+
+RedisClient.prototype.initialize_retry_vars = function () {
+ this.retry_timer = null;
+ this.retry_totaltime = 0;
+ this.retry_delay = 150;
+ this.retry_backoff = 1.7;
+ this.attempts = 1;
+};
+
+RedisClient.prototype.unref = function () {
+ trace("User requesting to unref the connection");
+ if (this.connected) {
+ trace("unref'ing the socket connection");
+ this.stream.unref();
+ }
+ else {
+ trace("Not connected yet, will unref later");
+ this.once("connect", function () {
+ this.unref();
+ })
+ }
+};
+
+// flush offline_queue and command_queue, erroring any items with a callback first
+RedisClient.prototype.flush_and_error = function (message) {
+ var command_obj, error;
+
+ error = new Error(message);
+
+ while (this.offline_queue.length > 0) {
+ command_obj = this.offline_queue.shift();
+ if (typeof command_obj.callback === "function") {
+ try {
+ command_obj.callback(error);
+ } catch (callback_err) {
+ process.nextTick(function () {
+ throw callback_err;
+ });
+ }
+ }
+ }
+ this.offline_queue = new Queue();
+
+ while (this.command_queue.length > 0) {
+ command_obj = this.command_queue.shift();
+ if (typeof command_obj.callback === "function") {
+ try {
+ command_obj.callback(error);
+ } catch (callback_err) {
+ process.nextTick(function () {
+ throw callback_err;
+ });
+ }
+ }
+ }
+ this.command_queue = new Queue();
+};
+
+RedisClient.prototype.on_error = function (msg) {
+ var message = "Redis connection to " + this.address + " failed - " + msg;
+
+ if (this.closing) {
+ return;
+ }
+
+ if (exports.debug_mode) {
+ console.warn(message);
+ }
+
+ this.flush_and_error(message);
+
+ this.connected = false;
+ this.ready = false;
+
+ this.emit("error", new Error(message));
+ // "error" events get turned into exceptions if they aren't listened for. If the user handled this error
+ // then we should try to reconnect.
+ this.connection_gone("error");
+};
+
+RedisClient.prototype.do_auth = function () {
+ var self = this;
+
+ if (exports.debug_mode) {
+ console.log("Sending auth to " + self.address + " id " + self.connection_id);
+ }
+ self.send_anyway = true;
+ self.send_command("auth", [this.auth_pass], function (err, res) {
+ if (err) {
+ if (err.toString().match("LOADING")) {
+ // if redis is still loading the db, it will not authenticate and everything else will fail
+ console.log("Redis still loading, trying to authenticate later");
+ setTimeout(function () {
+ self.do_auth();
+ }, 2000); // TODO - magic number alert
+ return;
+ } else if (err.toString().match("no password is set")) {
+ console.log("Warning: Redis server does not require a password, but a password was supplied.")
+ err = null;
+ res = "OK";
+ } else {
+ return self.emit("error", new Error("Auth error: " + err.message));
+ }
+ }
+ if (res.toString() !== "OK") {
+ return self.emit("error", new Error("Auth failed: " + res.toString()));
+ }
+ if (exports.debug_mode) {
+ console.log("Auth succeeded " + self.address + " id " + self.connection_id);
+ }
+ if (self.auth_callback) {
+ self.auth_callback(err, res);
+ self.auth_callback = null;
+ }
+
+ // now we are really connected
+ self.emit("connect");
+ self.initialize_retry_vars();
+
+ if (self.options.no_ready_check) {
+ self.on_ready();
+ } else {
+ self.ready_check();
+ }
+ });
+ self.send_anyway = false;
+};
+
+RedisClient.prototype.on_connect = function () {
+ if (exports.debug_mode) {
+ console.log("Stream connected " + this.address + " id " + this.connection_id);
+ }
+
+ this.connected = true;
+ this.ready = false;
+ this.connections += 1;
+ this.command_queue = new Queue();
+ this.emitted_end = false;
+ if (this.options.socket_nodelay) {
+ this.stream.setNoDelay();
+ }
+ this.stream.setKeepAlive(this.options.socket_keepalive);
+ this.stream.setTimeout(0);
+
+ this.init_parser();
+
+ if (this.auth_pass) {
+ this.do_auth();
+ } else {
+ this.emit("connect");
+ this.initialize_retry_vars();
+
+ if (this.options.no_ready_check) {
+ this.on_ready();
+ } else {
+ this.ready_check();
+ }
+ }
+};
+
+RedisClient.prototype.init_parser = function () {
+ var self = this;
+
+ if (this.options.parser) {
+ if (! parsers.some(function (parser) {
+ if (parser.name === self.options.parser) {
+ self.parser_module = parser;
+ if (exports.debug_mode) {
+ console.log("Using parser module: " + self.parser_module.name);
+ }
+ return true;
+ }
+ })) {
+ throw new Error("Couldn't find named parser " + self.options.parser + " on this system");
+ }
+ } else {
+ if (exports.debug_mode) {
+ console.log("Using default parser module: " + parsers[0].name);
+ }
+ this.parser_module = parsers[0];
+ }
+
+ this.parser_module.debug_mode = exports.debug_mode;
+
+ // return_buffers sends back Buffers from parser to callback. detect_buffers sends back Buffers from parser, but
+ // converts to Strings if the input arguments are not Buffers.
+ this.reply_parser = new this.parser_module.Parser({
+ return_buffers: self.options.return_buffers || self.options.detect_buffers || false
+ });
+
+ // "reply error" is an error sent back by Redis
+ this.reply_parser.on("reply error", function (reply) {
+ if (reply instanceof Error) {
+ self.return_error(reply);
+ } else {
+ self.return_error(new Error(reply));
+ }
+ });
+ this.reply_parser.on("reply", function (reply) {
+ self.return_reply(reply);
+ });
+ // "error" is bad. Somehow the parser got confused. It'll try to reset and continue.
+ this.reply_parser.on("error", function (err) {
+ self.emit("error", new Error("Redis reply parser error: " + err.stack));
+ });
+};
+
+RedisClient.prototype.on_ready = function () {
+ var self = this;
+
+ this.ready = true;
+
+ if (this.old_state !== null) {
+ this.monitoring = this.old_state.monitoring;
+ this.pub_sub_mode = this.old_state.pub_sub_mode;
+ this.selected_db = this.old_state.selected_db;
+ this.old_state = null;
+ }
+
+ // magically restore any modal commands from a previous connection
+ if (this.selected_db !== null) {
+ // this trick works if and only if the following send_command
+ // never goes into the offline queue
+ var pub_sub_mode = this.pub_sub_mode;
+ this.pub_sub_mode = false;
+ this.send_command('select', [this.selected_db]);
+ this.pub_sub_mode = pub_sub_mode;
+ }
+ if (this.pub_sub_mode === true) {
+ // only emit "ready" when all subscriptions were made again
+ var callback_count = 0;
+ var callback = function () {
+ callback_count--;
+ if (callback_count === 0) {
+ self.emit("ready");
+ }
+ };
+ Object.keys(this.subscription_set).forEach(function (key) {
+ var parts = key.split(" ");
+ if (exports.debug_mode) {
+ console.warn("sending pub/sub on_ready " + parts[0] + ", " + parts[1]);
+ }
+ callback_count++;
+ self.send_command(parts[0] + "scribe", [parts[1]], callback);
+ });
+ return;
+ } else if (this.monitoring) {
+ this.send_command("monitor");
+ } else {
+ this.send_offline_queue();
+ }
+ this.emit("ready");
+};
+
+RedisClient.prototype.on_info_cmd = function (err, res) {
+ var self = this, obj = {}, lines, retry_time;
+
+ if (err) {
+ return self.emit("error", new Error("Ready check failed: " + err.message));
+ }
+
+ lines = res.toString().split("\r\n");
+
+ lines.forEach(function (line) {
+ var parts = line.split(':');
+ if (parts[1]) {
+ obj[parts[0]] = parts[1];
+ }
+ });
+
+ obj.versions = [];
+ if( obj.redis_version ){
+ obj.redis_version.split('.').forEach(function (num) {
+ obj.versions.push(+num);
+ });
+ }
+
+ // expose info key/vals to users
+ this.server_info = obj;
+
+ if (!obj.loading || (obj.loading && obj.loading === "0")) {
+ if (exports.debug_mode) {
+ console.log("Redis server ready.");
+ }
+ this.on_ready();
+ } else {
+ retry_time = obj.loading_eta_seconds * 1000;
+ if (retry_time > 1000) {
+ retry_time = 1000;
+ }
+ if (exports.debug_mode) {
+ console.log("Redis server still loading, trying again in " + retry_time);
+ }
+ setTimeout(function () {
+ self.ready_check();
+ }, retry_time);
+ }
+};
+
+RedisClient.prototype.ready_check = function () {
+ var self = this;
+
+ if (exports.debug_mode) {
+ console.log("checking server ready state...");
+ }
+
+ this.send_anyway = true; // secret flag to send_command to send something even if not "ready"
+ this.info(function (err, res) {
+ self.on_info_cmd(err, res);
+ });
+ this.send_anyway = false;
+};
+
+RedisClient.prototype.send_offline_queue = function () {
+ var command_obj, buffered_writes = 0;
+
+ while (this.offline_queue.length > 0) {
+ command_obj = this.offline_queue.shift();
+ if (exports.debug_mode) {
+ console.log("Sending offline command: " + command_obj.command);
+ }
+ buffered_writes += !this.send_command(command_obj.command, command_obj.args, command_obj.callback);
+ }
+ this.offline_queue = new Queue();
+ // Even though items were shifted off, Queue backing store still uses memory until next add, so just get a new Queue
+
+ if (!buffered_writes) {
+ this.should_buffer = false;
+ this.emit("drain");
+ }
+};
+
+RedisClient.prototype.connection_gone = function (why) {
+ var self = this;
+
+ // If a retry is already in progress, just let that happen
+ if (this.retry_timer) {
+ return;
+ }
+
+ if (exports.debug_mode) {
+ console.warn("Redis connection is gone from " + why + " event.");
+ }
+ this.connected = false;
+ this.ready = false;
+
+ if (this.old_state === null) {
+ var state = {
+ monitoring: this.monitoring,
+ pub_sub_mode: this.pub_sub_mode,
+ selected_db: this.selected_db
+ };
+ this.old_state = state;
+ this.monitoring = false;
+ this.pub_sub_mode = false;
+ this.selected_db = null;
+ }
+
+ // since we are collapsing end and close, users don't expect to be called twice
+ if (! this.emitted_end) {
+ this.emit("end");
+ this.emitted_end = true;
+ }
+
+ this.flush_and_error("Redis connection gone from " + why + " event.");
+
+ // If this is a requested shutdown, then don't retry
+ if (this.closing) {
+ this.retry_timer = null;
+ if (exports.debug_mode) {
+ console.warn("connection ended from quit command, not retrying.");
+ }
+ return;
+ }
+
+ var nextDelay = Math.floor(this.retry_delay * this.retry_backoff);
+ if (this.retry_max_delay !== null && nextDelay > this.retry_max_delay) {
+ this.retry_delay = this.retry_max_delay;
+ } else {
+ this.retry_delay = nextDelay;
+ }
+
+ if (exports.debug_mode) {
+ console.log("Retry connection in " + this.retry_delay + " ms");
+ }
+
+ if (this.max_attempts && this.attempts >= this.max_attempts) {
+ this.retry_timer = null;
+ // TODO - some people need a "Redis is Broken mode" for future commands that errors immediately, and others
+ // want the program to exit. Right now, we just log, which doesn't really help in either case.
+ console.error("node_redis: Couldn't get Redis connection after " + this.max_attempts + " attempts.");
+ return;
+ }
+
+ this.attempts += 1;
+ this.emit("reconnecting", {
+ delay: self.retry_delay,
+ attempt: self.attempts
+ });
+ this.retry_timer = setTimeout(function () {
+ if (exports.debug_mode) {
+ console.log("Retrying connection...");
+ }
+
+ self.retry_totaltime += self.retry_delay;
+
+ if (self.connect_timeout && self.retry_totaltime >= self.connect_timeout) {
+ self.retry_timer = null;
+ // TODO - engage Redis is Broken mode for future commands, or whatever
+ console.error("node_redis: Couldn't get Redis connection after " + self.retry_totaltime + "ms.");
+ return;
+ }
+
+ self.stream = net.createConnection(self.connectionOption);
+ self.install_stream_listeners();
+ self.retry_timer = null;
+ }, this.retry_delay);
+};
+
+RedisClient.prototype.on_data = function (data) {
+ if (exports.debug_mode) {
+ console.log("net read " + this.address + " id " + this.connection_id + ": " + data.toString());
+ }
+
+ try {
+ this.reply_parser.execute(data);
+ } catch (err) {
+ // This is an unexpected parser problem, an exception that came from the parser code itself.
+ // Parser should emit "error" events if it notices things are out of whack.
+ // Callbacks that throw exceptions will land in return_reply(), below.
+ // TODO - it might be nice to have a different "error" event for different types of errors
+ this.emit("error", err);
+ }
+};
+
+RedisClient.prototype.return_error = function (err) {
+ var command_obj = this.command_queue.shift(), queue_len = this.command_queue.getLength();
+
+ if (this.pub_sub_mode === false && queue_len === 0) {
+ this.command_queue = new Queue();
+ this.emit("idle");
+ }
+ if (this.should_buffer && queue_len <= this.command_queue_low_water) {
+ this.emit("drain");
+ this.should_buffer = false;
+ }
+
+ if (command_obj && typeof command_obj.callback === "function") {
+ try {
+ command_obj.callback(err);
+ } catch (callback_err) {
+ // if a callback throws an exception, re-throw it on a new stack so the parser can keep going
+ process.nextTick(function () {
+ throw callback_err;
+ });
+ }
+ } else {
+ console.log("node_redis: no callback to send error: " + err.message);
+ // this will probably not make it anywhere useful, but we might as well throw
+ process.nextTick(function () {
+ throw err;
+ });
+ }
+};
+
+// if a callback throws an exception, re-throw it on a new stack so the parser can keep going.
+// if a domain is active, emit the error on the domain, which will serve the same function.
+// put this try/catch in its own function because V8 doesn't optimize this well yet.
+function try_callback(callback, reply) {
+ try {
+ callback(null, reply);
+ } catch (err) {
+ if (process.domain) {
+ var currDomain = process.domain;
+ currDomain.emit('error', err);
+ if (process.domain === currDomain) {
+ currDomain.exit();
+ }
+ } else {
+ process.nextTick(function () {
+ throw err;
+ });
+ }
+ }
+}
+
+// hgetall converts its replies to an Object. If the reply is empty, null is returned.
+function reply_to_object(reply) {
+ var obj = {}, j, jl, key, val;
+
+ if (reply.length === 0) {
+ return null;
+ }
+
+ for (j = 0, jl = reply.length; j < jl; j += 2) {
+ key = reply[j].toString('binary');
+ val = reply[j + 1];
+ obj[key] = val;
+ }
+
+ return obj;
+}
+
+function reply_to_strings(reply) {
+ var i;
+
+ if (Buffer.isBuffer(reply)) {
+ return reply.toString();
+ }
+
+ if (Array.isArray(reply)) {
+ for (i = 0; i < reply.length; i++) {
+ if (reply[i] !== null && reply[i] !== undefined) {
+ reply[i] = reply[i].toString();
+ }
+ }
+ return reply;
+ }
+
+ return reply;
+}
+
+RedisClient.prototype.return_reply = function (reply) {
+ var command_obj, len, type, timestamp, argindex, args, queue_len;
+
+ // If the "reply" here is actually a message received asynchronously due to a
+ // pubsub subscription, don't pop the command queue as we'll only be consuming
+ // the head command prematurely.
+ if (Array.isArray(reply) && reply.length > 0 && reply[0]) {
+ type = reply[0].toString();
+ }
+
+ if (this.pub_sub_mode && (type == 'message' || type == 'pmessage')) {
+ trace("received pubsub message");
+ }
+ else {
+ command_obj = this.command_queue.shift();
+ }
+
+ queue_len = this.command_queue.getLength();
+
+ if (this.pub_sub_mode === false && queue_len === 0) {
+ this.command_queue = new Queue(); // explicitly reclaim storage from old Queue
+ this.emit("idle");
+ }
+ if (this.should_buffer && queue_len <= this.command_queue_low_water) {
+ this.emit("drain");
+ this.should_buffer = false;
+ }
+
+ if (command_obj && !command_obj.sub_command) {
+ if (typeof command_obj.callback === "function") {
+ if (this.options.detect_buffers && command_obj.buffer_args === false) {
+ // If detect_buffers option was specified, then the reply from the parser will be Buffers.
+ // If this command did not use Buffer arguments, then convert the reply to Strings here.
+ reply = reply_to_strings(reply);
+ }
+
+ // TODO - confusing and error-prone that hgetall is special cased in two places
+ if (reply && 'hgetall' === command_obj.command.toLowerCase()) {
+ reply = reply_to_object(reply);
+ }
+
+ try_callback(command_obj.callback, reply);
+ } else if (exports.debug_mode) {
+ console.log("no callback for reply: " + (reply && reply.toString && reply.toString()));
+ }
+ } else if (this.pub_sub_mode || (command_obj && command_obj.sub_command)) {
+ if (Array.isArray(reply)) {
+ type = reply[0].toString();
+
+ if (type === "message") {
+ this.emit("message", reply[1].toString(), reply[2]); // channel, message
+ } else if (type === "pmessage") {
+ this.emit("pmessage", reply[1].toString(), reply[2].toString(), reply[3]); // pattern, channel, message
+ } else if (type === "subscribe" || type === "unsubscribe" || type === "psubscribe" || type === "punsubscribe") {
+ if (reply[2] === 0) {
+ this.pub_sub_mode = false;
+ if (this.debug_mode) {
+ console.log("All subscriptions removed, exiting pub/sub mode");
+ }
+ } else {
+ this.pub_sub_mode = true;
+ }
+ // subscribe commands take an optional callback and also emit an event, but only the first response is included in the callback
+ // TODO - document this or fix it so it works in a more obvious way
+ // reply[1] can be null
+ var reply1String = (reply[1] === null) ? null : reply[1].toString();
+ if (command_obj && typeof command_obj.callback === "function") {
+ try_callback(command_obj.callback, reply1String);
+ }
+ this.emit(type, reply1String, reply[2]); // channel, count
+ } else {
+ throw new Error("subscriptions are active but got unknown reply type " + type);
+ }
+ } else if (! this.closing) {
+ throw new Error("subscriptions are active but got an invalid reply: " + reply);
+ }
+ } else if (this.monitoring) {
+ len = reply.indexOf(" ");
+ timestamp = reply.slice(0, len);
+ argindex = reply.indexOf('"');
+ args = reply.slice(argindex + 1, -1).split('" "').map(function (elem) {
+ return elem.replace(/\\"/g, '"');
+ });
+ this.emit("monitor", timestamp, args);
+ } else {
+ throw new Error("node_redis command queue state error. If you can reproduce this, please report it.");
+ }
+};
+
+// This Command constructor is ever so slightly faster than using an object literal, but more importantly, using
+// a named constructor helps it show up meaningfully in the V8 CPU profiler and in heap snapshots.
+function Command(command, args, sub_command, buffer_args, callback) {
+ this.command = command;
+ this.args = args;
+ this.sub_command = sub_command;
+ this.buffer_args = buffer_args;
+ this.callback = callback;
+}
+
+RedisClient.prototype.send_command = function (command, args, callback) {
+ var arg, command_obj, i, il, elem_count, buffer_args, stream = this.stream, command_str = "", buffered_writes = 0, last_arg_type, lcaseCommand;
+
+ if (typeof command !== "string") {
+ throw new Error("First argument to send_command must be the command name string, not " + typeof command);
+ }
+
+ if (Array.isArray(args)) {
+ if (typeof callback === "function") {
+ // probably the fastest way:
+ // client.command([arg1, arg2], cb); (straight passthrough)
+ // send_command(command, [arg1, arg2], cb);
+ } else if (! callback) {
+ // most people find this variable argument length form more convenient, but it uses arguments, which is slower
+ // client.command(arg1, arg2, cb); (wraps up arguments into an array)
+ // send_command(command, [arg1, arg2, cb]);
+ // client.command(arg1, arg2); (callback is optional)
+ // send_command(command, [arg1, arg2]);
+ // client.command(arg1, arg2, undefined); (callback is undefined)
+ // send_command(command, [arg1, arg2, undefined]);
+ last_arg_type = typeof args[args.length - 1];
+ if (last_arg_type === "function" || last_arg_type === "undefined") {
+ callback = args.pop();
+ }
+ } else {
+ throw new Error("send_command: last argument must be a callback or undefined");
+ }
+ } else {
+ throw new Error("send_command: second argument must be an array");
+ }
+
+ if (callback && process.domain) callback = process.domain.bind(callback);
+
+ // if the last argument is an array and command is sadd or srem, expand it out:
+ // client.sadd(arg1, [arg2, arg3, arg4], cb);
+ // converts to:
+ // client.sadd(arg1, arg2, arg3, arg4, cb);
+ lcaseCommand = command.toLowerCase();
+ if ((lcaseCommand === 'sadd' || lcaseCommand === 'srem') && args.length > 0 && Array.isArray(args[args.length - 1])) {
+ args = args.slice(0, -1).concat(args[args.length - 1]);
+ }
+
+ // if the value is undefined or null and command is set or setx, need not to send message to redis
+ if (command === 'set' || command === 'setex') {
+ if(args[args.length - 1] === undefined || args[args.length - 1] === null) {
+ var err = new Error('send_command: ' + command + ' value must not be undefined or null');
+ return callback && callback(err);
+ }
+ }
+
+ buffer_args = false;
+ for (i = 0, il = args.length, arg; i < il; i += 1) {
+ if (Buffer.isBuffer(args[i])) {
+ buffer_args = true;
+ }
+ }
+
+ command_obj = new Command(command, args, false, buffer_args, callback);
+
+ if ((!this.ready && !this.send_anyway) || !stream.writable) {
+ if (exports.debug_mode) {
+ if (!stream.writable) {
+ console.log("send command: stream is not writeable.");
+ }
+ }
+
+ if (this.enable_offline_queue) {
+ if (exports.debug_mode) {
+ console.log("Queueing " + command + " for next server connection.");
+ }
+ this.offline_queue.push(command_obj);
+ this.should_buffer = true;
+ } else {
+ var not_writeable_error = new Error('send_command: stream not writeable. enable_offline_queue is false');
+ if (command_obj.callback) {
+ command_obj.callback(not_writeable_error);
+ } else {
+ throw not_writeable_error;
+ }
+ }
+
+ return false;
+ }
+
+ if (command === "subscribe" || command === "psubscribe" || command === "unsubscribe" || command === "punsubscribe") {
+ this.pub_sub_command(command_obj);
+ } else if (command === "monitor") {
+ this.monitoring = true;
+ } else if (command === "quit") {
+ this.closing = true;
+ } else if (this.pub_sub_mode === true) {
+ throw new Error("Connection in subscriber mode, only subscriber commands may be used");
+ }
+ this.command_queue.push(command_obj);
+ this.commands_sent += 1;
+
+ elem_count = args.length + 1;
+
+ // Always use "Multi bulk commands", but if passed any Buffer args, then do multiple writes, one for each arg.
+ // This means that using Buffers in commands is going to be slower, so use Strings if you don't already have a Buffer.
+
+ command_str = "*" + elem_count + "\r\n$" + command.length + "\r\n" + command + "\r\n";
+
+ if (! buffer_args) { // Build up a string and send entire command in one write
+ for (i = 0, il = args.length, arg; i < il; i += 1) {
+ arg = args[i];
+ if (typeof arg !== "string") {
+ arg = String(arg);
+ }
+ command_str += "$" + Buffer.byteLength(arg) + "\r\n" + arg + "\r\n";
+ }
+ if (exports.debug_mode) {
+ console.log("send " + this.address + " id " + this.connection_id + ": " + command_str);
+ }
+ buffered_writes += !stream.write(command_str);
+ } else {
+ if (exports.debug_mode) {
+ console.log("send command (" + command_str + ") has Buffer arguments");
+ }
+ buffered_writes += !stream.write(command_str);
+
+ for (i = 0, il = args.length, arg; i < il; i += 1) {
+ arg = args[i];
+ if (!(Buffer.isBuffer(arg) || arg instanceof String)) {
+ arg = String(arg);
+ }
+
+ if (Buffer.isBuffer(arg)) {
+ if (arg.length === 0) {
+ if (exports.debug_mode) {
+ console.log("send_command: using empty string for 0 length buffer");
+ }
+ buffered_writes += !stream.write("$0\r\n\r\n");
+ } else {
+ buffered_writes += !stream.write("$" + arg.length + "\r\n");
+ buffered_writes += !stream.write(arg);
+ buffered_writes += !stream.write("\r\n");
+ if (exports.debug_mode) {
+ console.log("send_command: buffer send " + arg.length + " bytes");
+ }
+ }
+ } else {
+ if (exports.debug_mode) {
+ console.log("send_command: string send " + Buffer.byteLength(arg) + " bytes: " + arg);
+ }
+ buffered_writes += !stream.write("$" + Buffer.byteLength(arg) + "\r\n" + arg + "\r\n");
+ }
+ }
+ }
+ if (exports.debug_mode) {
+ console.log("send_command buffered_writes: " + buffered_writes, " should_buffer: " + this.should_buffer);
+ }
+ if (buffered_writes || this.command_queue.getLength() >= this.command_queue_high_water) {
+ this.should_buffer = true;
+ }
+ return !this.should_buffer;
+};
+
+RedisClient.prototype.pub_sub_command = function (command_obj) {
+ var i, key, command, args;
+
+ if (this.pub_sub_mode === false && exports.debug_mode) {
+ console.log("Entering pub/sub mode from " + command_obj.command);
+ }
+ this.pub_sub_mode = true;
+ command_obj.sub_command = true;
+
+ command = command_obj.command;
+ args = command_obj.args;
+ if (command === "subscribe" || command === "psubscribe") {
+ if (command === "subscribe") {
+ key = "sub";
+ } else {
+ key = "psub";
+ }
+ for (i = 0; i < args.length; i++) {
+ this.subscription_set[key + " " + args[i]] = true;
+ }
+ } else {
+ if (command === "unsubscribe") {
+ key = "sub";
+ } else {
+ key = "psub";
+ }
+ for (i = 0; i < args.length; i++) {
+ delete this.subscription_set[key + " " + args[i]];
+ }
+ }
+};
+
+RedisClient.prototype.end = function () {
+ this.stream._events = {};
+
+ //clear retry_timer
+ if(this.retry_timer){
+ clearTimeout(this.retry_timer);
+ this.retry_timer=null;
+ }
+ this.stream.on("error", function(){});
+
+ this.connected = false;
+ this.ready = false;
+ this.closing = true;
+ return this.stream.destroySoon();
+};
+
+function Multi(client, args) {
+ this._client = client;
+ this.queue = [["MULTI"]];
+ if (Array.isArray(args)) {
+ this.queue = this.queue.concat(args);
+ }
+}
+
+exports.Multi = Multi;
+
+// take 2 arrays and return the union of their elements
+function set_union(seta, setb) {
+ var obj = {};
+
+ seta.forEach(function (val) {
+ obj[val] = true;
+ });
+ setb.forEach(function (val) {
+ obj[val] = true;
+ });
+ return Object.keys(obj);
+}
+
+// This static list of commands is updated from time to time. ./lib/commands.js can be updated with generate_commands.js
+commands = set_union(["get", "set", "setnx", "setex", "append", "strlen", "del", "exists", "setbit", "getbit", "setrange", "getrange", "substr",
+ "incr", "decr", "mget", "rpush", "lpush", "rpushx", "lpushx", "linsert", "rpop", "lpop", "brpop", "brpoplpush", "blpop", "llen", "lindex",
+ "lset", "lrange", "ltrim", "lrem", "rpoplpush", "sadd", "srem", "smove", "sismember", "scard", "spop", "srandmember", "sinter", "sinterstore",
+ "sunion", "sunionstore", "sdiff", "sdiffstore", "smembers", "zadd", "zincrby", "zrem", "zremrangebyscore", "zremrangebyrank", "zunionstore",
+ "zinterstore", "zrange", "zrangebyscore", "zrevrangebyscore", "zcount", "zrevrange", "zcard", "zscore", "zrank", "zrevrank", "hset", "hsetnx",
+ "hget", "hmset", "hmget", "hincrby", "hdel", "hlen", "hkeys", "hvals", "hgetall", "hexists", "incrby", "decrby", "getset", "mset", "msetnx",
+ "randomkey", "select", "move", "rename", "renamenx", "expire", "expireat", "keys", "dbsize", "auth", "ping", "echo", "save", "bgsave",
+ "bgrewriteaof", "shutdown", "lastsave", "type", "multi", "exec", "discard", "sync", "flushdb", "flushall", "sort", "info", "monitor", "ttl",
+ "persist", "slaveof", "debug", "config", "subscribe", "unsubscribe", "psubscribe", "punsubscribe", "publish", "watch", "unwatch", "cluster",
+ "restore", "migrate", "dump", "object", "client", "eval", "evalsha"], require("./lib/commands"));
+
+commands.forEach(function (fullCommand) {
+ var command = fullCommand.split(' ')[0];
+
+ RedisClient.prototype[command] = function (args, callback) {
+ if (Array.isArray(args) && typeof callback === "function") {
+ return this.send_command(command, args, callback);
+ } else {
+ return this.send_command(command, to_array(arguments));
+ }
+ };
+ RedisClient.prototype[command.toUpperCase()] = RedisClient.prototype[command];
+
+ Multi.prototype[command] = function () {
+ this.queue.push([command].concat(to_array(arguments)));
+ return this;
+ };
+ Multi.prototype[command.toUpperCase()] = Multi.prototype[command];
+});
+
+// store db in this.select_db to restore it on reconnect
+RedisClient.prototype.select = function (db, callback) {
+ var self = this;
+
+ this.send_command('select', [db], function (err, res) {
+ if (err === null) {
+ self.selected_db = db;
+ }
+ if (typeof(callback) === 'function') {
+ callback(err, res);
+ } else if (err) {
+ self.emit('error', err);
+ }
+ });
+};
+RedisClient.prototype.SELECT = RedisClient.prototype.select;
+
+// Stash auth for connect and reconnect. Send immediately if already connected.
+RedisClient.prototype.auth = function () {
+ var args = to_array(arguments);
+ this.auth_pass = args[0];
+ this.auth_callback = args[1];
+ if (exports.debug_mode) {
+ console.log("Saving auth as " + this.auth_pass);
+ }
+
+ if (this.connected) {
+ this.send_command("auth", args);
+ }
+};
+RedisClient.prototype.AUTH = RedisClient.prototype.auth;
+
+RedisClient.prototype.hmget = function (arg1, arg2, arg3) {
+ if (Array.isArray(arg2) && typeof arg3 === "function") {
+ return this.send_command("hmget", [arg1].concat(arg2), arg3);
+ } else if (Array.isArray(arg1) && typeof arg2 === "function") {
+ return this.send_command("hmget", arg1, arg2);
+ } else {
+ return this.send_command("hmget", to_array(arguments));
+ }
+};
+RedisClient.prototype.HMGET = RedisClient.prototype.hmget;
+
+RedisClient.prototype.hmset = function (args, callback) {
+ var tmp_args, tmp_keys, i, il, key;
+
+ if (Array.isArray(args) && typeof callback === "function") {
+ return this.send_command("hmset", args, callback);
+ }
+
+ args = to_array(arguments);
+ if (typeof args[args.length - 1] === "function") {
+ callback = args[args.length - 1];
+ args.length -= 1;
+ } else {
+ callback = null;
+ }
+
+ if (args.length === 2 && (typeof args[0] === "string" || typeof args[0] === "number") && typeof args[1] === "object") {
+ // User does: client.hmset(key, {key1: val1, key2: val2})
+ // assuming key is a string, i.e. email address
+
+ // if key is a number, i.e. timestamp, convert to string
+ if (typeof args[0] === "number") {
+ args[0] = args[0].toString();
+ }
+
+ tmp_args = [ args[0] ];
+ tmp_keys = Object.keys(args[1]);
+ for (i = 0, il = tmp_keys.length; i < il ; i++) {
+ key = tmp_keys[i];
+ tmp_args.push(key);
+ tmp_args.push(args[1][key]);
+ }
+ args = tmp_args;
+ }
+
+ return this.send_command("hmset", args, callback);
+};
+RedisClient.prototype.HMSET = RedisClient.prototype.hmset;
+
+Multi.prototype.hmset = function () {
+ var args = to_array(arguments), tmp_args;
+ if (args.length >= 2 && typeof args[0] === "string" && typeof args[1] === "object") {
+ tmp_args = [ "hmset", args[0] ];
+ Object.keys(args[1]).map(function (key) {
+ tmp_args.push(key);
+ tmp_args.push(args[1][key]);
+ });
+ if (args[2]) {
+ tmp_args.push(args[2]);
+ }
+ args = tmp_args;
+ } else {
+ args.unshift("hmset");
+ }
+
+ this.queue.push(args);
+ return this;
+};
+Multi.prototype.HMSET = Multi.prototype.hmset;
+
+Multi.prototype.exec = function (callback) {
+ var self = this;
+ var errors = [];
+ // drain queue, callback will catch "QUEUED" or error
+ // TODO - get rid of all of these anonymous functions which are elegant but slow
+ this.queue.forEach(function (args, index) {
+ var command = args[0], obj;
+ if (typeof args[args.length - 1] === "function") {
+ args = args.slice(1, -1);
+ } else {
+ args = args.slice(1);
+ }
+ if (args.length === 1 && Array.isArray(args[0])) {
+ args = args[0];
+ }
+ if (command.toLowerCase() === 'hmset' && typeof args[1] === 'object') {
+ obj = args.pop();
+ Object.keys(obj).forEach(function (key) {
+ args.push(key);
+ args.push(obj[key]);
+ });
+ }
+ this._client.send_command(command, args, function (err, reply) {
+ if (err) {
+ var cur = self.queue[index];
+ if (typeof cur[cur.length - 1] === "function") {
+ cur[cur.length - 1](err);
+ } else {
+ errors.push(new Error(err));
+ }
+ }
+ });
+ }, this);
+
+ // TODO - make this callback part of Multi.prototype instead of creating it each time
+ return this._client.send_command("EXEC", [], function (err, replies) {
+ if (err) {
+ if (callback) {
+ errors.push(new Error(err));
+ callback(errors);
+ return;
+ } else {
+ throw new Error(err);
+ }
+ }
+
+ var i, il, reply, args;
+
+ if (replies) {
+ for (i = 1, il = self.queue.length; i < il; i += 1) {
+ reply = replies[i - 1];
+ args = self.queue[i];
+
+ // TODO - confusing and error-prone that hgetall is special cased in two places
+ if (reply && args[0].toLowerCase() === "hgetall") {
+ replies[i - 1] = reply = reply_to_object(reply);
+ }
+
+ if (typeof args[args.length - 1] === "function") {
+ args[args.length - 1](null, reply);
+ }
+ }
+ }
+
+ if (callback) {
+ callback(null, replies);
+ }
+ });
+};
+Multi.prototype.EXEC = Multi.prototype.exec;
+
+RedisClient.prototype.multi = function (args) {
+ return new Multi(this, args);
+};
+RedisClient.prototype.MULTI = function (args) {
+ return new Multi(this, args);
+};
+
+
+// stash original eval method
+var eval_orig = RedisClient.prototype.eval;
+// hook eval with an attempt to evalsha for cached scripts
+RedisClient.prototype.eval = RedisClient.prototype.EVAL = function () {
+ var self = this,
+ args = to_array(arguments),
+ callback;
+
+ if (typeof args[args.length - 1] === "function") {
+ callback = args.pop();
+ }
+
+ if (Array.isArray(args[0])) {
+ args = args[0];
+ }
+
+ // replace script source with sha value
+ var source = args[0];
+ args[0] = crypto.createHash("sha1").update(source).digest("hex");
+
+ self.evalsha(args, function (err, reply) {
+ if (err && /NOSCRIPT/.test(err.message)) {
+ args[0] = source;
+ eval_orig.call(self, args, callback);
+
+ } else if (callback) {
+ callback(err, reply);
+ }
+ });
+};
+
+
+exports.createClient = function(arg0, arg1, arg2){
+ if( arguments.length === 0 ){
+
+ // createClient()
+ return createClient_tcp(default_port, default_host, {});
+
+ } else if( typeof arg0 === 'number' ||
+ typeof arg0 === 'string' && arg0.match(/^\d+$/) ){
+
+ // createClient( 3000, host, options)
+ // createClient('3000', host, options)
+ return createClient_tcp(arg0, arg1, arg2);
+
+ } else if( typeof arg0 === 'string' ){
+
+ // createClient( '/tmp/redis.sock', options)
+ return createClient_unix(arg0,arg1);
+
+ } else if( arg0 !== null && typeof arg0 === 'object' ){
+
+ // createClient(options)
+ return createClient_tcp(default_port, default_host, arg0 );
+
+ } else if( arg0 === null && arg1 === null ){
+
+ // for backward compatibility
+ // createClient(null,null,options)
+ return createClient_tcp(default_port, default_host, arg2);
+
+ } else {
+ throw new Error('unknown type of connection in createClient()');
+ }
+}
+
+var createClient_unix = function(path, options){
+ var cnxOptions = {
+ path: path
+ };
+ var net_client = net.createConnection(cnxOptions);
+ var redis_client = new RedisClient(net_client, options || {});
+
+ redis_client.connectionOption = cnxOptions;
+ redis_client.address = path;
+
+ return redis_client;
+}
+
+var createClient_tcp = function (port_arg, host_arg, options) {
+ var cnxOptions = {
+ 'port' : port_arg || default_port,
+ 'host' : host_arg || default_host,
+ 'family' : (options && options.family === 'IPv6') ? 6 : 4
+ };
+ var net_client = net.createConnection(cnxOptions);
+ var redis_client = new RedisClient(net_client, options || {});
+
+ redis_client.connectionOption = cnxOptions;
+ redis_client.address = cnxOptions.host + ':' + cnxOptions.port;
+
+ return redis_client;
+};
+
+exports.print = function (err, reply) {
+ if (err) {
+ console.log("Error: " + err);
+ } else {
+ console.log("Reply: " + reply);
+ }
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 06:31:09 +0000