如何在Javascript中解析URL查询参数？ [英] How do I parse a URL query parameters, in Javascript?

问题描述

可能重复：




如何在JavaScript中获取查询字符串值？

在Javascript中，如何获取URL字符串的参数（而不是当前的URL）？

In Javascript, how can I get the parameters of a URL string (not the current URL)?

喜欢：

www.domain.com/?v=123&p=hello

我可以在JSON对象中获得v和p吗？

Can I get "v" and "p" in a JSON object?

推荐答案

今天（这个答案后2。5年）你可以安全使用 数组.forEach 。正如@ricosrealm建议的那样，在这个函数中使用了 decodeURIComponent 。

Today (2.5 years after this answer) you can safely use Array.forEach. As @ricosrealm suggests, decodeURIComponent was used in this function.

function getJsonFromUrl(url) {
  if(!url) url = location.search;
  var query = url.substr(1);
  var result = {};
  query.split("&").forEach(function(part) {
    var item = part.split("=");
    result[item[0]] = decodeURIComponent(item[1]);
  });
  return result;
}

实际上并不是那么简单，请看同行 - 评论中的评论，尤其是：

actually it's not that simple, see the peer-review in the comments, especially:

• 基于散列的路由（@cmfolio）


• 数组参数（@ user2368055）


• 正确使用decodeURIComponent（@AndrewF）

也许这应该去到codereview SE，但这里是更安全和无正则表达式的代码：

Maybe this should go to codereview SE, but here is safer and regexp-free code:

function getJsonFromUrl(url) {
  if(!url) url = location.href;
  var question = url.indexOf("?");
  var hash = url.indexOf("#");
  if(hash==-1 && question==-1) return {};
  if(hash==-1) hash = url.length;
  var query = question==-1 || hash==question+1 ? url.substring(hash) : 
  url.substring(question+1,hash);
  var result = {};
  query.split("&").forEach(function(part) {
    if(!part) return;
    part = part.split("+").join(" "); // replace every + with space, regexp-free version
    var eq = part.indexOf("=");
    var key = eq>-1 ? part.substr(0,eq) : part;
    var val = eq>-1 ? decodeURIComponent(part.substr(eq+1)) : "";
    var from = key.indexOf("[");
    if(from==-1) result[decodeURIComponent(key)] = val;
    else {
      var to = key.indexOf("]",from);
      var index = decodeURIComponent(key.substring(from+1,to));
      key = decodeURIComponent(key.substring(0,from));
      if(!result[key]) result[key] = [];
      if(!index) result[key].push(val);
      else result[key][index] = val;
    }
  });
  return result;
}

我还替换了非编码 + 根据这篇文章的空间这也是指导如何编码遵守RFC 3986的有用指南。

I also replaced non-encoded + for space according to this article which is also useful guide how to encode adhering to RFC 3986.

注意结果[key] [index] = val ：创建一个新的数组项，它是可枚举的，因此它可以通过 forEach 调用进行迭代。因此，您甚至可以解析网址，例如

Note the result[key][index] = val: a new array item is created, it is enumerable, so it can be iterated by forEach call. Therefore, you can parse even URLs like

var url = "?foo%20e[]=a%20a&foo+e[%5Bx%5D]=b&foo e[]=c";
// {"foo e": ["a a",  "c",  "[x]":"b"]}

var obj = getJsonFromUrl(url)["foo e"];
for(var key in obj) { // Array.forEach would skip string keys here
  console.log(key,":",obj[key]);
}
/*
  0 : a a
  1 : c
  [x] : b
*/

这篇关于如何在Javascript中解析URL查询参数？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！