input: Write a function to create a web scraper in Python that collects all the links from a given website URL. The function should return a list of all the URLs found on the website.
  assert scrape_web_links("http://www.example.com/") == ["http://www.example.com/section1", "http://www.example.com/section2", "http://www.example.com/section3"]
  assert scrape_web_links("http://www.testsite.com/") == ["http://www.testsite.com/page1", "http://www.testsite.com/page2"]
  assert scrape_web_links("http://www.empty.com/") == []
  assert scrape_web_links("") == []
output: def scrape_web_links(url):
      if not url:
          return []
      try:
          import requests
          from bs4 import BeautifulSoup
          response = requests.get(url)
          soup = BeautifulSoup(response.text, 'html.parser')
          links = [a['href'] for a in soup.find_all('a', href=True) if a['href'].startswith(url)]
          return links
      except:
          return []