正则表达式从连接字符串中检索密码

Question

How do I write a regular expression to retrieve password from connection string.

Connection string is like this:

USER ID=system;PASSWORD = ab;DATA ..

or

USER ID=system;PASSWORD=ab;DATA ...

or

USER ID=system;PASSWORD =ab;DATA...

or

USER ID=system;PASSWORD= ab;DATA ...

Tried the approach of using ConnectionStringBuilder. Works for SQL Server. But in case of Oracle it throws this exception:

Invalid length for connection option 'Data Source', maximum length is 128.

The Oracle Connection String:

USER ID=sa;PASSWORD=abc;DATA SOURCE="(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.1)(PORT = 8080))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = Orcl)))"

Answer 1

Is there a requirement that you have to use a regular expression ? .NET has the functionality built in:

var sb = new SqlConnectionStringBuilder("USER ID=system;PASSWORD =ab;");
Console.WriteLine(sb.Password);

This is likely to be more robust than using a regular expression for that. The rules for the fields are rather comprehensive, and it is easy to make a Regex that will work for most connectionstrings, but will fail on some. See the connection string rules for a list of the rules that must be embedded in such a Regex.

Answer 2

正则表达式：

.*PASSWORD[ ]*=[ ]*([^;]+)