AgentSkillsCN

regex-patterns

常用正则表达式模式与验证规则，适用于正则表达式的编写、文本解析、处理与模式匹配等场景。

SKILL.md
--- frontmatter
name: regex-patterns
description: "Common regex patterns and validation. Use when writing regular expressions for validation, parsing, text processing, or pattern matching."
metadata:
  {
    "openclaw":
      {
        "emoji": "🔍",
        "requires": {},
        "install": [],
      },
  }

Regex Patterns Skill

Common regular expression patterns for validation, parsing, text processing, and pattern matching.

When to Use

  • •Validating input formats
  • •Extracting data from text
  • •Searching and replacing text
  • •Parsing log files
  • •Data transformation

Validation Patterns

Email

regex
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

Phone Number (International)

regex
^\+?[1-9]\d{1,14}$

URL

regex
^(https?:\/\/)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)$

IPv4 Address

regex
^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$

Credit Card

regex
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9]{2})[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11})$

Programming Patterns

Hex Color

regex
^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$

UUID

regex
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$

File Extension

regex
\.([a-zA-Z0-9]+)$

CSS Class Name

regex
^-?[_a-zA-Z]+[_a-zA-Z0-9-]*$

Text Processing

HTML Tags

regex
<[^>]+>

Markdown Links

regex
\[([^\]]+)\]\(([^)]+)\)

Whitespace

regex
\s+

Leading/Trailing Whitespace

regex
^\s+|\s+$

Multiple Spaces

regex
{2,}

Log Parsing

Timestamp (ISO 8601)

regex
\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}:\d{2})?

IP in Log

regex
\b(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

Error Level

regex
\b(ERROR|WARN|INFO|DEBUG|TRACE)\b

Python Examples

python
import re

# Validate email
if re.match(r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$', email):
    print("Valid email")

# Extract all URLs
text = "Visit https://example.com or http://test.org"
urls = re.findall(r'https?://[^\s<>"{}|\\^`[\]]+', text)

# Replace multiple spaces
clean_text = re.sub(r'\s+', ' ', text)

# Parse log lines
log_pattern = r'(\d{4}-\d{2}-\d{2}) (\d{2}:\d{2}:\d{2}) (\w+) (.+)'
match = re.match(log_pattern, log_line)
if match:
    date, time, level, message = match.groups()

JavaScript Examples

javascript
// Validate email
const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
if (emailRegex.test(email)) {
    console.log("Valid email");
}

// Extract hashtags
const text = "Love #JavaScript and #Python!";
const hashtags = text.match(/#[a-zA-Z0-9_]+/g);

// Format phone number
const phone = "1234567890";
const formatted = phone.replace(/(\d{3})(\d{3})(\d{4})/, "($1) $2-$3");

Testing Tools

  • •regex101.com - Interactive regex tester
  • •regextester.com - JavaScript regex tester
  • •regexr.com - Regex tester with explanations