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/**
* Base proxy.
*
* @class
* @abstract
* @name BaseProxy
* @arg {object} [opts] - Options.
* @arg {?number} [opts.speed=null] - Proxy speed, kb/s.
* @arg {?number} [opts.reqSpeed=null] - Requests speed, kb/s.
* @arg {?number} [opts.resSpeed=null] - Responses speed, kb/s.
* @arg {boolean} [opts.useCache=false] - Flag to use cache middleware.
* @arg {number} [opts.reconnect=0] - Number of times reconnect to remote
* side, if it breaks connection.
* @arg {timeout} [opts.timeout=60000] - Time to wait remote side response, ms.
* @arg {port} [opts.port=0] - Port. Default is random.
*/
var _ = require("lodash");
var U = require("glace-utils");
var BaseProxy = function (opts) {
opts = U.defVal(opts, {});
this.isRunning = false;
this.reqSpeed = U.defVal(opts.reqSpeed, opts.speed);
this.resSpeed = U.defVal(opts.resSpeed, opts.speed);
this.responsesData = null;
this.useCache = U.defVal(opts.useCache, false);
this._reconnect = U.defVal(opts.reconnect, 0);
this._timeout = U.defVal(opts.timeout, 60000);
this._port = U.defVal(opts.port, 0);
this._proxy = null;
};
/**
* Gets port number.
*
* @method
* @return {number} Proxy port number.
* @throws {Error} If port number is not defined and will be chosen randomly.
*/
BaseProxy.prototype.getPort = function () {
if (this._port === 0) throw Error(
"Port is not defined and will be chosen randomly on proxy start");
return this._port;
};
/**
* Sets proxy speed.
*
* @method
* @arg {number|object} speed - Proxy speed, kb/s.
* @arg {?number} [speed.req] - Requests speed, kb/s.
* @arg {?number} [speed.res] - Responses speed, kb/s.
*/
BaseProxy.prototype.setSpeed = function (speed) {
if (_.isNumber(speed)) {
this.reqSpeed = this.resSpeed = speed;
} else {
if (speed.req !== undefined) this.reqSpeed = speed.req;
if (speed.res !== undefined) this.resSpeed = speed.res;
};
};
/**
* Resets proxy speed.
*
* @method
*/
BaseProxy.prototype.resetSpeed = function () {
this.reqSpeed = this.resSpeed = null;
};
/**
* Starts to measure responses and gather information of them.
*
* @method
*/
BaseProxy.prototype.measureResponses = function () {
this.responsesData = [];
};
/**
* Disables responses measurement.
*
* @method
*/
BaseProxy.prototype.unmeasureResponses = function () {
this.responsesData = null;
};
/**
* Gets responses data.
*
* @method
*/
BaseProxy.prototype.getResponsesData = function () {
if (this.responsesData === null) return null;
return _.cloneDeep(this.responsesData);
};
/**
* Starts proxy.
*
* @method
*/
BaseProxy.prototype.start = function () {
throw new Error("Should be implemented in derived class");
};
/**
* Stops proxy server.
*
* @method
*/
BaseProxy.prototype.stop = function () {
throw new Error("Should be implemented in derived class");
};
module.exports = BaseProxy;
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