NetworkStream缺少数据(NetworkStream missing data)

 您无需执行整个％1操作即可将捕获传递给您的函数。 string.gsub的一种可能的操作模式是将一个函数作为参数，并在每次找到匹配时向其传递表示捕获的字符串/字符串数组： 
 
 
 
 捕获值的最后一次使用可能是最强大的。 我们可以使用函数作为第三个参数调用string.gsub，而不是替换字符串。 当以这种方式调用时，string.gsub每次找到匹配时都会调用给定的函数; 此函数的参数是捕获，而函数返回的值用作替换字符串。 
 
 
 考虑到这一点，您可以从现有代码中删除一些字符，以便传递函数而不是调用它： 
 
function stringModify(a)
  return string.gsub(a, '{(.-)}', stringDecide)
end
 
 正如您所看到的 ，您的stringDecide函数将不会被修改。 
 
 在你现有的代码中，你想要发生的是string.gsub将为每个匹配调用stringDecide ，在每次调用时将捕获到string参数中的字符串替换为stringDecide ，但事实上发生的是stringDecide被调用一次甚至在调用string.gsub之前使用文字参数"%1" ，它按预期返回"ERROR" ，基本上将string.gsub调用扩展到string.gsub(a, '{(.-)}', "ERROR") 。 

You don't have to do the whole %1 thing to pass the captures over to your function. One possible mode of operation of string.gsub takes a function as an argument and passes it a string/array of strings representing the capture(s) every time it finds a match:
 
 
 
The last use of captured values is perhaps the most powerful. We can call string.gsub with a function as its third argument, instead of a replacement string. When invoked this way, string.gsub calls the given function every time it finds a match; the arguments to this function are the captures, while the value that the function returns is used as the replacement string.
 
 
Taking this into account, you can just remove a few characters from your existing code so you pass the function rather than calling it:
 
function stringModify(a)
  return string.gsub(a, '{(.-)}', stringDecide)
end
 
and your stringDecide function will work unmodified, as you can see.
 
In your existing code, what you're wanting to happen is that string.gsub will call stringDecide for each match, substituting the string captured into the string parameter to stringDecide on each call, but what's in fact happening is that stringDecide is being called once with the literal parameter "%1" before string.gsub is even called, and it is returning "ERROR" as expected, basically expanding your string.gsub call in place to string.gsub(a, '{(.-)}', "ERROR").