带有括号的某些字符串导致Ajax POST操作失败，出现403错误(禁止)

When attempting to add an entry to a database via a form submission using Ajax, certain strings containing parenthesis will cause the POST operation to fail, but not in a consistent way.

当尝试使用Ajax通过表单提交向数据库添加条目时，包含括号的某些字符串将导致POST操作失败，但不会以一致的方式。

The relevant POST operation looks like this:

相关的岗位操作如下:

$.ajax(
{
  type: "POST",
  url: "SubmitAnswer.php",
  data: datastring,
  dataType: "json",
  cache: false,
  success: function(data)
  {
    ...
  }
}

The datastring contains a bunch of stuff including a string containing a mathematical expression. If that string contains parenthesis, in certain very specific cases, it will cause the POST operation to fail with a 403 error when the Submit button is clicked.

datastring包含一系列内容，包括一个包含数学表达式的字符串。如果该字符串包含括号，在某些非常特定的情况下，当单击Submit按钮时，将导致POST操作失败，并出现403错误。

Here are some examples of mathematical expression strings that cause a problem:

下面是一些数学表达式字符串导致问题的例子:

(A-B)*C
(A*B)*(C*D)

Here are some examples of mathematical expression strings that do NOT cause a problem:

下面是一些数学表达式字符串的例子，它们不会引起问题:

(A+B)*C
A*(B-C)
(A*B)+(C*D)

It's almost as though certain permutations trip some kind of "protection" flag preventing them from being posted to the database? Or some kind of bizarre parsing error?

几乎就好像某些特定的排列会破坏某种“保护”标志，阻止它们被发布到数据库中?还是某种奇怪的解析错误?

2 个解决方案

#1

Doesn't look like you are correctly encoding the keys and / or values in datastring for use in an application/x-www-form-urlencoded request payload.

看起来您并没有正确地编码用于应用程序/x-www-form- urlenencoded的键和/或值。

My advice, let jQuery do the encoding by passing an object, eg

我的建议是，让jQuery通过传递一个对象来进行编码

$.ajax({
  method: 'POST',
  url: 'SubmitAnswer.php',
  dataType: 'json',
  data: {
    edition_id: edition_id,
    nickname: nickname,
    answer: answer,
    email_address: email_address
  }
})

2 个解决方案

#1

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