比如我有一串字符串格式的URL，例如下边这样：
%5B%7B%22ip%22%3A%22119.90.49.95%22%2C%22port%22%3A%228074%22%7D%2C%7B%22ip%22%3A%22119.90.49.110%22%2C%22port%22%3A%228050%22%7D%2C%7B%22ip%22%3A%22119.90.49.92%22%2C%22port%22%3A%228057%22%7D%2C%7B%22ip%22%3A%22119.90.49.104%22%2C%22port%22%3A%228016%22%7D%2C%7B%22ip%22%3A%22119.90.49.104%22%2C%22port%22%3A%228017%22%7D%2C%7B%22ip%22%3A%22119.90.49.102%22%2C%22port%22%3A%228007%22%7D%2C%7B%22ip%22%3A%22119.90.49.107%22%2C%22port%22%3A%228034%22%7D%2C%7B%22ip%22%3A%22119.90.49.110%22%2C%22port%22%3A%228049%22%7D%2C%7B%22ip%22%3A%22119.90.49.91%22%2C%22port%22%3A%228053%22%7D%2C%7B%22ip%22%3A%22119.90.49.94%22%2C%22port%22%3A%228069%22%7D%5D
我想通过类似urldecode这样的函数转化为下边这样的形式：
```[{"ip":"119.90.49.95","port":"8074"},{"ip":"119.90.49.110","port":"8050"},{"ip":"119.90.49.92","port":"8057"},{"ip":"119.90.49.104","port":"8016"},{"ip":"119.90.49.104","port":"8017"},{"ip":"119.90.49.102","port":"8007"},{"ip":"119.90.49.107","port":"8034"},{"ip":"119.90.49.110","port":"8049"},{"ip":"119.90.49.91","port":"8053"},{"ip":"119.90.49.94","port":"8069"}]```
百度了好久也没找到GO中有类似的函数或者是库，难道这个问题不会经常用到么，，，还望大神解决
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