所以,当你确定一切都已完成时,只做“res.render”吧?因为它结束了请求并拍摄了一个网页。
答案 0 :(得分:11)
如果您没有向res.render(view[, options[, fn]])
提供回叫,它会自动提供200 HTTP状态和内容类型的响应:text / html
res.render('view', {}, function() {
while (true); // should block
});
res.render(查看[,选项[,fn]])
使用给定选项和可选回调fn渲染视图。当给出回调函数时,不会自动响应,否则会给出200和text / html的响应。
答案 1 :(得分:4)
使用当前github master commit,这是lib/view.js中的res.render
:
/**
* Render `view` with the given `options` and optional callback `fn`.
* When a callback function is given a response will _not_ be made
* automatically, however otherwise a response of _200_ and _text/html_ is given.
*
* Options:
*
* - `scope` Template evaluation context (the value of `this`)
* - `debug` Output debugging information
* - `status` Response status code
*
* @param {String} view
* @param {Object|Function} options or callback function
* @param {Function} fn
* @api public
*/
res.render = function(view, opts, fn, parent, sub){
// support callback function as second arg
if ('function' == typeof opts) {
fn = opts, opts = null;
}
try {
return this._render(view, opts, fn, parent, sub);
} catch (err) {
// callback given
if (fn) {
fn(err);
// unwind to root call to prevent
// several next(err) calls
} else if (sub) {
throw err;
// root template, next(err)
} else {
this.req.next(err);
}
}
};