3

我正在尝试使用正则表达式从我的 tnsnames 文件中提取一些信息。我从以下模式开始：

MYSCHEMA *? = *?[\W\w\S\s]*\(HOST *?= *?(?<host>\w+\s?)\)\s?\(PORT *?= *?(?<port>\d+)\s?\)[\W\w\S\s]*\(SERVICE_NAME *?= *?(?<servicename>\w+)\s?\)

当 MYSCHEMA 是文件中唯一的模式时，它工作得很好，但是当 MYSCHEMA 之后列出了其他模式时，它一直匹配到最后一个模式。

从那以后，我创建了一个新模式：

MYSCHEMA *=\s*\(DESCRIPTION =\s*\(ADDRESS *= *\(PROTOCOL *= *TCP\)\(HOST *= *(?<host>\w+)\)\(PORT *= *(?<port>\d+)\)\)\s*\(CONNECT_DATA *=\s*(?<serverdedicated>\(SERVER *= *DEDICATED\))\s*\(SERVICE_NAME *= *(?<servicename>[\w\.]+) *\)\s*\)\s*\)

此模式仅匹配 MYSCHEMA，但我必须添加出现在 MYSCHEMA 条目中的每个元素，如果它不包含所有相同的元素，它将不会匹配 MYOTHERSCHEMA。

理想情况下，我想要一个仅匹配 MYSCHEMA 条目的模式，并捕获 HOST、PORT 和 SERVICE NAME，以及可选的 (SERVER = DEDICATED)（我在第一个模式中没有）到命名组。

以下是我一直用于测试的示例 tnsname：

SOMESCHEMA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = REMOTEHOST)(PORT = 1234))
    )
    (CONNECT_DATA = (SERVICE_NAME = REMOTE)
    )
  )

MYSCHEMA =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = MYSERVICE.LOCAL )
    )
  )

MYOTHERSCHEMA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234))
    )
    (CONNECT_DATA = 
      (SERVICE_NAME = MYSERVICE.REMOTE)
    )

  )

SOMEOTHERSCHEMA = 
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = LOCALHOST)(PORT = 1234))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = LOCAL)
    )
  )
4

5 回答 5

2

这应该做到这一点，使用平衡组。并根据您的需要修改开关/外壳。

class TnsRegex
{
    public void Test()
    {
        Regex reTns = new Regex(_pattern, RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace);
        MatchCollection matchCollection = reTns.Matches(_text);

        foreach (Match match in matchCollection)
        {
            foreach (Capture capture in match.Groups["Settings"].Captures)
            {
                string[] setting = capture.Value.Split(new[] { '=' }, StringSplitOptions.RemoveEmptyEntries);
                string key = setting[0].Trim();
                string val = setting[1].Trim();
                if (val.Contains("(")) continue;
                switch (key)
                {
                    case "HOST":
                        break;
                    case "PORT":
                        break;
                    case "SERVICE_NAME":
                        break;
                    case "SERVER":
                        break;
                }
                Console.WriteLine(key + ":" + val);
            }
        }
    }
    string _pattern = @"
        MYSCHEMA\s+=\s+\(
        [^\(\)]*
        (
                    (
                                (?<Open>\()
                                [^\(\)]*
                    )+
                    (
                                (?<Settings-Open>\))
                                [^\(\)]*
                    )+
        )*
        (?(Open)(?!))
    \)";

    string _text = @"
    MYSCHEMA =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234))
        (CONNECT_DATA =
          (SERVER = DEDICATED)
          (SERVICE_NAME = MYSERVICE.LOCAL )
        )
      )

    SOMESCHEMA =
      (DESCRIPTION =
        (ADDRESS_LIST =
          (ADDRESS = (PROTOCOL = TCP)(HOST = REMOTEHOST)(PORT = 1234))
        )
        (CONNECT_DATA = (SERVICE_NAME = REMOTE)
        )
      )
    ";
}
于 2010-08-23T18:38:04.253 回答
1

以下正则表达式将解析出单个 TNS 条目，您所要做的就是解析每个结果，您认为适合名称/值的方式

([\w-]+)\s*=(?:\s|.)+?\)\s*\)\s*\)\s*(?=[\w\-])

示例：https ://regexr.com/3r2vn

于 2018-06-17T02:53:21.497 回答
0

Well, since I haven't found a compelling answer to this issue (no offense @Mikael Svenson), I have just stuck with the second pattern listed in my question. It is sufficient for the time being, as the tnsnames.ora file always follows that exact pattern within our organization. Should the tnsnames.ora file format change, I will most likely adopt a parser.

于 2010-09-29T19:56:44.173 回答
0

此表达式使用 address_list 上的一个地址解析架构等。希望这会有所帮助。

--begin (?>((?[\n][\s] [^(][\w_.]+)[\s] =[\s] ))(?>(?[\n\s( ]描述[\s=\s] (?>(?[\n\s(]*ADDRESS_LIST[\s=\s]*[\n\s(] ADDRESS[\s=\s]) (?([ \n\s(]社区)([\n\s(]社区[\s=\s] (?[\w.)]+))|())[\s\n] (?([\ n\s(]PROTOCOL)([\n\s(]PROTOCOL[\s=\s] (?[\w.)]+))|())[\s\n] (?([\n \s(]HOST)([\n\s(]HOST[\s=\s] (?[\w.)]+))|())[\s\n] (?([\n\ s(]PORT)([\n\s(]PORT[\s=\s] (?[\w.)]+))|())[\s\n] (?())()) |())))[\s\n] (?>(?[\n][\s] [(]CONNECT_DATA\s*[=]\s*[\n] (?([(]SID\ s [=]\s*)(([(]SID\s*[=]\s*(?[\w.]+)\s*[)]))|())[\s\n] (?([(]服务器\s[=]\s*)(([(]SERVER\s*[=]\s*(?[\w.]+)\s*[)]))|())[\s\n]* (?([(]SERVICE_NAME\s*[=]\s*)(([(]SERVICE_NAME\s*[=]\s*(?[\w.]+)\s*[)]))| ())[\s\n] (?())())|())))[\s\n] (?())())|()))) *--end

毫无疑问，问题在于写入该文件形式的倍数。正如您所说的文件必须是唯一的，这可以通过使用 TNS_ADMIN 变量来解决。

于 2010-12-27T15:48:59.903 回答
0

我尝试了上述答案，但没有一个对我有用......

    [DebuggerDisplay("Name {Name} Host:{Host} ServiceName:{ServiceName} Port:{Port}")]
    public class TnsEntry
    {
        public string Name { get; set; }
        public string Host { get; set; }
        public string Port { get; set; }
        public string ServiceName { get; set; }
    }


   public class TnsNamesFileParser
   {
    public string TNSNamesContents { get; set; }

    public TnsNamesFileParser()
    {
    }

    public TnsNamesFileParser(string locationAndNameOfTnsNamesFile)
    {
        TNSNamesContents = System.IO.File.ReadAllText(locationAndNameOfTnsNamesFile);
    }

    public List<TnsEntry> Parse()
    {
        return Parse(TNSNamesContents);
    }

    public List<TnsEntry> Parse(string TNSNamesContents)
    {
        string TNSPattern = @"([\w -] +)\s *= (?:\s |.) +?\)\s *\)\s *\)\s * ((?=[\w\-])|(?=$))";

        Regex reTns = new Regex(TNSPattern, RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace);
        MatchCollection matchCollection = reTns.Matches(TNSNamesContents);

        var TnsEntries = new List<TnsEntry>();

        foreach (Match match in matchCollection)
        {
            var tnsEntry = new TnsEntry();
            string matchedValue = match.Value.Trim();

            tnsEntry.Name = Regex.Match(matchedValue, @"^([^\s]+)", RegexOptions.IgnoreCase)?.Value.Trim();
            tnsEntry.Host = Regex.Match(matchedValue, "(?<=HOST.+=) ([^)]*)", RegexOptions.IgnoreCase)?.Value.Trim();
            tnsEntry.Port = Regex.Match(matchedValue, "(?<=PORT.+=) ([^)]*)", RegexOptions.IgnoreCase)?.Value.Trim();
            tnsEntry.ServiceName = Regex.Match(matchedValue, "(?<=SERVICE_NAME.+=) ([^)]*)", RegexOptions.IgnoreCase)?.Value;

            TnsEntries.Add(tnsEntry);

        }

        return TnsEntries;
    }
  }

//Test Code: 

string testdata =@"
        SOMESCHEMA =
        (DESCRIPTION =
        (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = REMOTEHOST)(PORT = 1234))
        )
        (CONNECT_DATA = (SERVICE_NAME = REMOTE)
        )
        )

        MYSCHEMA =
        (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234))
        (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = MYSERVICE.LOCAL )
        )
        )

        MYOTHERSCHEMA =
        (DESCRIPTION =
        (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234))
        )
        (CONNECT_DATA = 
        (SERVICE_NAME = MYSERVICE.REMOTE)
        )
        )

        SOMEOTHERSCHEMA = 
        (DESCRIPTION =
        (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = LOCALHOST)(PORT = 1234))
        )
        (CONNECT_DATA =
        (SERVICE_NAME = LOCAL)
        )
        )";
 [Test]
 public void ParseTNSFileEntries()
 {

  var tnsNamesFileParser = new TnsNamesFileParser();
  var entries =  tnsNamesFileParser.Parse(testdata);


 }
于 2019-08-09T23:40:32.147 回答