Write a program that takes a URL of a web page as parameter, downloads the requested page and extracts all URLs it links.
Hint: You may have a look at this page and this page to learn about regular expressions in Go.
Write a TCP file server that listens for incoming connections on port 2018. The
server manages the directory dbox and allows clients to operate on files in
that directory. In particular, the server can answer the following requests:
| Operation name | Description |
|---|---|
ls |
return the list of files inside dbox |
cat file |
return the content of file |
rm file |
remove the file and return the result of the operation |
get file |
download the file and save it in the current directory |
info file |
return info about the file, e.g., its size, the last accessed date, etc. |
Test your server using the telnet or nc command line tools.
Consider the chat app discussed during the class. Reimplement it using the UDP protocol instead of TCP.