它是做从Web工作者AJAX请求是否可行？ [英] Is it feasible to do an AJAX request from a Web Worker?

问题描述

我似乎不能够使用jQuery在我webworker，我知道必须有一个方式与 XMLHtt prequest 做到这一点，但它似乎这样可能不是一个很好的选择，当我读到这个答案。

I do not seem to be able to use jQuery in my webworker, I know there must be a way to do it with XMLHttpRequest, but it seems like that might not be a good option when I read this answer.

推荐答案

当然：您可以使用AJAX你webworker里面，你就必须为记住是一个AJAX电话是异步的，你将不得不使用回调。

Of course you can use AJAX inside of your webworker, you just have to remember that an AJAX call is asynchronous and you will have to use callbacks.

这是 AJAX 功能我用我的webworker内打服务器，并执行AJAX请求：

This is the ajax function I use inside of my webworker to hit the server and do AJAX requests:

var ajax = function(url, data, callback, type) {
  var data_array, data_string, idx, req, value;
  if (data == null) {
    data = {};
  }
  if (callback == null) {
    callback = function() {};
  }
  if (type == null) {
    //default to a GET request
    type = 'GET';
  }
  data_array = [];
  for (idx in data) {
    value = data[idx];
    data_array.push("" + idx + "=" + value);
  }
  data_string = data_array.join("&");
  req = new XMLHttpRequest();
  req.open(type, url, false);
  req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  req.onreadystatechange = function() {
    if (req.readyState === 4 && req.status === 200) {
      return callback(req.responseText);
    }
  };
  req.send(data_string);
  return req;
};

然后你的工人在里面可以做的：

Then inside your worker you can do:

ajax(url, {'send': true, 'lemons': 'sour'}, function(data) {
   //do something with the data like:
   self.postMessage(data);
}, 'POST');

您的也许的想读这个答案一些，如果可能发生的陷阱你的太多 AJAX请求经历webworkers。

You might want to read this answer about some of the pitfalls that might happen if you have too many AJAX requests going through webworkers.

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