code: def _get_unique_links(page_url, soup):
      
      if "http://" not in page_url and "https://" not in page_url:
          return []
      prefix = 'http:'
      if page_url.startswith('https:'):
          prefix = 'https:'
      simple_url = page_url.split('://')[1]
      base_url = simple_url.split('/')[0]
      full_base_url = prefix + "//" + base_url
  
      raw_links = []
      raw_unique_links = []
  
      # Get "href" from all "a" tags
      links = soup.find_all('a')
      for link in links:
          raw_links.append(link.get('href'))
  
      # Get "src" from all "img" tags
      img_links = soup.find_all('img')
      for img_link in img_links:
          raw_links.append(img_link.get('src'))
  
      # Get "href" from all "link" tags
      links = soup.find_all('link')
      for link in links:
          raw_links.append(link.get('href'))
  
      # Get "src" from all "script" tags
      img_links = soup.find_all('script')
      for img_link in img_links:
          raw_links.append(img_link.get('src'))
  
      for link in raw_links:
          if link not in raw_unique_links:
              raw_unique_links.append(link)
  
      unique_links = []
      for link in raw_unique_links:
          if link and len(link) > 1:
              if link.startswith('//'):
                  link = prefix + link
              elif link.startswith('/'):
                  link = full_base_url + link
              elif link.startswith('./'):
                  link = full_base_url + link[1:]
              elif link.startswith('#'):
                  link = full_base_url + link
              elif '//' not in link:
                  link = full_base_url + "/" + link
              else:
                  pass
              unique_links.append(link)
  
      return unique_links
docs: Returns all unique links.
      Includes:
          "a"->"href", "img"->"src", "link"->"href", and "script"->"src" links.