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(Lua) POP3 over Multiple Hop SSHDemonstrates how to read POP3 email (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this: Application => ServerSSH1 => ServerSSH2 => POP3Server
-- In the following call to loadlib, change the path (./chilkat.dll) to the relative or absolute directory where the chilkat.dll, chilkat.so, or chilkat.dylib is located. chilkat = assert(package.loadlib("./chilkat.dll", "luaopen_chilkat"))() print(chilkat._VERSION) -- This example requires the Chilkat API to have been previously unlocked. -- See Global Unlock Sample for sample code. local ssh1 = chilkat.newSsh{} -- Connect directly to the 1st SSH server. local success = ssh1:Connect("serverssh1.com",22) if success ~= true then print(ssh1:LastErrorText()) end -- Authenticate using login/password: success = ssh1:AuthenticatePw("ssh1Login","ssh1Password") if success ~= true then print(ssh1:LastErrorText()) end -- Connect through the 1st SSH connection to reach a 2nd SSH server. -- Note: Any number of SSH connections may be simultaneously tunneled through a single -- existing SSH connection. local ssh2 = chilkat.newSsh{} success = ssh2:ConnectThroughSsh(ssh1,"serverssh2.com",22) if success ~= true then print(ssh2:LastErrorText()) end -- Authenticate with ssh2... success = ssh2:AuthenticatePw("ssh2Login","ssh2Password") if success ~= true then print(ssh2:LastErrorText()) end local mailman = chilkat.newMailMan{} -- Tell the mailman object to connect to the POP3 server though the ssh2 tunnel (which itself is routed through ssh1). -- The connection looks like this: Application => ServerSSH1 => ServerSSH2 => POP3Server success = mailman:UseSsh(ssh2) if success ~= true then print(mailman:LastErrorText()) end -- Set the POP3 server's hostname mailman:setMailHost("pop.someMailServer.com") -- Set the POP3 login/password. mailman:setPopUsername("myLogin") mailman:setPopPassword("myPassword") -- Establish the POP3 connection through the ssh2 tunnel. success = mailman:Pop3BeginSession() if success ~= true then print(mailman:LastErrorText()) end -- Get the number of messages in the mailbox. local numMessages = mailman:GetMailboxCount() local i = 1 while i <= numMessages do local email = mailman:FetchByMsgnum(i) if mailman:LastMethodSuccess() ~= true then print(mailman:LastErrorText()) end print(email:From(), ": ", email:Subject(), "\n") i = i + 1 end -- Close the connection with the POP3 server. (This closes the tunnel through ssh2) -- The connection with ssh2 is still alive, and may be used for more connections. success = mailman:Pop3EndSession() -- Close the connection with ssh2. (This closes the the tunnel through ssh1.) -- The connection with ssh1 is still alive, and may be used for more connections. ssh2:Disconnect() ssh1:Disconnect() |
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