关于获取浏览器参数的见解

Posted 2020-11-02 人在路途

　　插件,jquery.query.js

/**
 * jQuery.query - Query String Modification and Creation for jQuery
 * Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
 * Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
 * Date: 2009/8/13
 *
 * @author Blair Mitchelmore
 * @version 2.1.7
 *
 **/
new function(settings) { 
  // Various Settings
  var $separator = settings.separator || \'&\';
  var $spaces = settings.spaces === false ? false : true;
  var $suffix = settings.suffix === false ? \'\' : \'[]\';
  var $prefix = settings.prefix === false ? false : true;
  var $hash = $prefix ? settings.hash === true ? "#" : "?" : "";
  var $numbers = settings.numbers === false ? false : true;
  
  jQuery.query = new function() {
    var is = function(o, t) {
      return o != undefined && o !== null && (!!t ? o.constructor == t : true);
    };
    var parse = function(path) {
      var m, rx = /\\[([^[]*)\\]/g, match = /^([^[]+)(\\[.*\\])?$/.exec(path), base = match[1], tokens = [];
      while (m = rx.exec(match[2])) tokens.push(m[1]);
      return [base, tokens];
    };
    var set = function(target, tokens, value) {
      var o, token = tokens.shift();
      if (typeof target != \'object\') target = null;
      if (token === "") {
        if (!target) target = [];
        if (is(target, Array)) {
          target.push(tokens.length == 0 ? value : set(null, tokens.slice(0), value));
        } else if (is(target, Object)) {
          var i = 0;
          while (target[i++] != null);
          target[--i] = tokens.length == 0 ? value : set(target[i], tokens.slice(0), value);
        } else {
          target = [];
          target.push(tokens.length == 0 ? value : set(null, tokens.slice(0), value));
        }
      } else if (token && token.match(/^\\s*[0-9]+\\s*$/)) {
        //var index = parseInt(token, 10);
        var index = token;//不自动转换
        if (!target) target = [];
        target[index] = tokens.length == 0 ? value : set(target[index], tokens.slice(0), value);
      } else if (token) {
        var index = token.replace(/^\\s*|\\s*$/g, "");
        if (!target) target = {};
        if (is(target, Array)) {
          var temp = {};
          for (var i = 0; i < target.length; ++i) {
            temp[i] = target[i];
          }
          target = temp;
        }
        target[index] = tokens.length == 0 ? value : set(target[index], tokens.slice(0), value);
      } else {
        return value;
      }
      return target;
    };
    
    var queryObject = function(a) {
      var self = this;
      self.keys = {};
      
      if (a.queryObject) {
        jQuery.each(a.get(), function(key, val) {
          self.SET(key, val);
        });
      } else {
        jQuery.each(arguments, function() {
          var q = "" + this;
          q = q.replace(/^[?#]/,\'\'); // remove any leading ? || #
          q = q.replace(/[;&]$/,\'\'); // remove any trailing & || ;
          if ($spaces) q = q.replace(/[+]/g,\' \'); // replace +\'s with spaces
          
          jQuery.each(q.split(/[&;]/), function(){
            var key = decodeURIComponent(this.split(\'=\')[0] || "");
            var val = decodeURIComponent(this.split(\'=\')[1] || "");
            
            if (!key) return;
            
            if ($numbers) {
              if (/^[+-]?[0-9]+\\.[0-9]*$/.test(val)) // simple float regex
                val = parseFloat(val);
              else if (/^[+-]?[0-9]+$/.test(val)) // simple int regex
                //val = parseInt(val, 10);//自动转换成整形
                  val =val;
            }
            
            val = (!val && val !== 0) ? true : val;
            
            if (val !== false && val !== true && typeof val != \'number\')
              val = val;
            
            self.SET(key, val);
          });
        });
      }
      return self;
    };
    
    queryObject.prototype = {
      queryObject: true,
      has: function(key, type) {
        var value = this.get(key);
        return is(value, type);
      },
      GET: function(key) {
        if (!is(key)) return this.keys;
        var parsed = parse(key), base = parsed[0], tokens = parsed[1];
        var target = this.keys[base];
        while (target != null && tokens.length != 0) {
          target = target[tokens.shift()];
        }
        return typeof target == \'number\' ? target : target || "";
      },
      get: function(key) {
        var target = this.GET(key);
        if (is(target, Object))
          return jQuery.extend(true, {}, target);
        else if (is(target, Array))
          return target.slice(0);
        return target;
      },
      SET: function(key, val) {
        var value = !is(val) ? null : val;
        var parsed = parse(key), base = parsed[0], tokens = parsed[1];
        var target = this.keys[base];
        this.keys[base] = set(target, tokens.slice(0), value);
        return this;
      },
      set: function(key, val) {
        return this.copy().SET(key, val);
      },
      REMOVE: function(key) {
        return this.SET(key, null).COMPACT();
      },
      remove: function(key) {
        return this.copy().REMOVE(key);
      },
      EMPTY: function() {
        var self = this;
        jQuery.each(self.keys, function(key, value) {
          delete self.keys[key];
        });
        return self;
      },
      load: function(url) {
        var hash = url.replace(/^.*?[#](.+?)(?:\\?.+)?$/, "$1");
        var search = url.replace(/^.*?[?](.+?)(?:#.+)?$/, "$1");
        return new queryObject(url.length == search.length ? \'\' : search, url.length == hash.length ? \'\' : hash);
      },
      empty: function() {
        return this.copy().EMPTY();
      },
      copy: function() {
        return new queryObject(this);
      },
      COMPACT: function() {
        function build(orig) {
          var obj = typeof orig == "object" ? is(orig, Array) ? [] : {} : orig;
          if (typeof orig == \'object\') {
            function add(o, key, value) {
              if (is(o, Array))
                o.push(value);
              else
                o[key] = value;
            }
            jQuery.each(orig, function(key, value) {
              if (!is(value)) return true;
              add(obj, key, build(value));
            });
          }
          return obj;
        }
        this.keys = build(this.keys);
        return this;
      },
      compact: function() {
        return this.copy().COMPACT();
      },
      toString: function() {
        var i = 0, queryString = [], chunks = [], self = this;
        var encode = function(str) {
          str = str + "";
          if ($spaces) str = str.replace(/ /g, "+");
          return encodeURIComponent(str);
        };
        var addFields = function(arr, key, value) {
          if (!is(value) || value === false) return;
          var o = [encode(key)];
          if (value !== true) {
            o.push("=");
            o.push(encode(value));
          }
          arr.push(o.join(""));
        };
        var build = function(obj, base) {
          var newKey = function(key) {
            return !base || base == "" ? [key].join("") : [base, "[", key, "]"].join("");
          };
          jQuery.each(obj, function(key, value) {
            if (typeof value == \'object\') 
              build(value, newKey(key));
            else
              addFields(chunks, newKey(key), value);
          });
        };
        
        build(this.keys);
        
        if (chunks.length > 0) queryString.push($hash);
        queryString.push(chunks.join($separator));
        
        return queryString.join("");
      }
    };
    
    return new queryObject(location.search, location.hash);
  };
}(jQuery.query || {}); // Pass in jQuery.query as settings object

View Code

　　效果

 

　　为了使用方便可以再项目中引用js，但是我自己在使用的时候发现一个bug问题，因为项目传参的特殊性，如果把浏览器的参数改成如下

 

 

 　　注意到这里已经获取不全了，如果nodeName=#,干脆直接返回true了，后来查看框架 里面用的是location.search进行解析，

　　

　　原因：

　　　　location.search返回的是？以后汉子以前的部分，所以中间被剪掉了，

 

 

 

　　所以自己写了一个方法，改成了href（获取浏览器地址，所有参数）同样实现功能

　　

//获取url中的参数()
function getUrlParam1(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
    var r = decodeURI(window.location.href).split(\'?\')[1].match(reg); //匹配目标参数(注意用的是href而不是search，因为search只能获取问好以后文字结束)
    if (r != null) return unescape(r[2]); return null; //返回参数值
}

 　　

 

但是后续再使用的过程中又发现了问题如果浏览器没有传参数的话，会报错误，如下

//获取url中的参数()
function getUrlParam1(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
    var r = (decodeURI(window.location.href).split(\'?\')[1]+\'\').match(reg); //匹配目标参数(注意用的是href而不是search，因为search只能获取问好以后文字结束)
    if (r != null) return unescape(r[2]); return null; //返回参数值
}

改成这样  ok