有什么区别:
http.Server(function(req,res){});
和
http.createServer(function(req,res){});
答案 0 :(得分:20)
基于nodejs的源代码(下面提取),createServer
只是实例化Server
的辅助方法。
exports.Server = Server;
exports.createServer = function(requestListener) {
return new Server(requestListener);
};
因此,您在原始问题中提到的两个代码段中唯一的 true 区别在于您没有使用new
关键字。
为清楚起见,Server
构造函数如下(在2012-12-13之后):
function Server(requestListener) {
if (!(this instanceof Server)) return new Server(requestListener);
net.Server.call(this, { allowHalfOpen: true });
if (requestListener) {
this.addListener('request', requestListener);
}
// Similar option to this. Too lazy to write my own docs.
// http://www.squid-cache.org/Doc/config/half_closed_clients/
// http://wiki.squid-cache.org/SquidFaq/InnerWorkings#What_is_a_half-closed_filedescriptor.3F
this.httpAllowHalfOpen = false;
this.addListener('connection', connectionListener);
this.addListener('clientError', function(err, conn) {
conn.destroy(err);
});
}
util.inherits(Server, net.Server);
答案 1 :(得分:2)
根据the docs,似乎是
http.createServer = function (requestListener) {
var ser = new http.Server();
ser.addListener(requestListener);
return ser;
};