ysjj-system/node_modules/superagent/lib/agent-base.js

function Agent() {
  this._defaults = [];
}

["use", "on", "once", "set", "query", "type", "accept", "auth", "withCredentials", "sortQuery", "retry", "ok", "redirects",
 "timeout", "buffer", "serialize", "parse", "ca", "key", "pfx", "cert"].forEach(function(fn) {
  /** Default setting for all requests from this agent */
  Agent.prototype[fn] = function(/*varargs*/) {
    this._defaults.push({fn:fn, arguments:arguments});
    return this;
  }
});

Agent.prototype._setDefaults = function(req) {
    this._defaults.forEach(function(def) {
      req[def.fn].apply(req, def.arguments);
    });
};

module.exports = Agent;