.NET Framework, Console Application

Link search

• Console application: searching for links in the HTML file
  • Searching for all appearances of links in the HTML file; sample files are here
  • the link consists of:
  • opening tag, link text and closing tag: <a ... href=[URL] ...>[link text]</a>; remember, that HTML is not case sensitive, thus for instance <A ... HreF=[URL] ...>[link text]</a> is also a valid link
  • [URL] consists of: ([protocol]://)[server name, port, options]
    • [protocol] can contain letters only; assume that [server name, port, options] can contain anything except for white spaces
    • [protocol] is optional
    • [URL] can start and end with quotation marks (" or '); if it does, cut them
  • [link text] can be any string
  • splitting the links into separate files, depending on the protocol
  • the name of the file is: [protocol].[extension]; the extension comes from the command line parameters
  • if the protocol in the link is not specified, put it in the unspec.[extension] file
• Command line parameters:
  • input file name
  • the [extension] for the output files
• Output data format: each link in the separate line: ([protocol]://)[server name, port, options] [link text]
• Requirements:
  • Catch all exceptions
  • If the link is broken into separate lines in a file, the solution can omit it
  • The Regex class must be used for searching the links, and extracting the substrings from the links
• Hints:
  • StreamReader, StreamWriter
  • Regex.Match()

• Approximate points:
  • reading command line arguments: 1.5
  • reading data from input file: 1.5
  • finding the links: 3.0
  • extracting the substrings from the links: 2.0
  • creating output files: 2.0