如何检索服务器脚本中的查询参数

Question

我正在使用Windows Azure移动服务为我的应用程序构建后端。对于服务器脚本的读取操作，现在我想检索查询参数，如$ filter，$ select在脚本中，等等。任何想法？

Answer 1

与在“读”功能的参数“查询”对象周围黑客攻击（通过使用的console.log）后，我终于找到了解决办法：

function isObject(variable) { 
    return variable !== null && 
     variable !== undefined && 
     typeof variable === 'object'; 
} 

// Find all the member-value pairs from the expression object 
function findMemberValuePairsFromExpression (expr, ret) { 
    if (!isObject(expr)) { 
     return null; 
    } 
    ret = ret || {}; 
    for (var name in expr) { 
     if (expr.hasOwnProperty(name)) { 
      var prop = expr[name]; 
      if (name === 'parent') { // Ignore parent property since it's added by us 
       continue; 
      } 
      else if (name === 'left') { // member expression are in the left subtree 
       if (isObject(prop)) { 
        prop.parent = expr; // Remember the parent 
        findMemberValuePairsFromExpression(prop, ret); 
       } 
      } 
      else if (name === 'member') { 
       // Found a member expression, find the value expression 
       // by the knowledge of the structure of the expression 
       var value = expr.parent.right.value; 
       ret[prop] = value; 
      } 
     } 
    } 

    if (expr.parent) { 
     // Remove the added parent property 
     delete expr.parent; 
    } 

    return ret; 
} 

// Get the filters component from query object and 
// find the member-value pairs in it 
function findMemberValuePairsFromQuery (query) { 
    var filters = query.getComponents().filters; 
    return findMemberValuePairsFromExpression(filters); 
} 

function read (query, user, request) { 
    request.execute(); 
} 

请记住，这种方法在很大程度上依赖于内查询对象的结构，以便将来可能打破。

query.getComponents（）也返回查询的其他部分，如“选择”，“跳过”，“顶级”等OData协议的基本上什么