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core.clj
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core.clj
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(ns clj-telnet.core
(:gen-class)
(:import
[org.apache.commons.net.telnet TelnetClient]
[java.net InetSocketAddress Socket]
[java.io PrintStream PrintWriter])
(:require [clj-telnet.wait :refer [wait-for]]))
(defn get-telnet
"returns a telnetclient given server-ip as String and port as int"
([^String server-ip ^Integer port]
;test if server will connect on port
(let [s (new java.net.Socket)]
(. s connect (new java.net.InetSocketAddress server-ip port) 5000)
(.close s))
(let [tc (TelnetClient.)]
(.connect tc server-ip port)
(.setKeepAlive tc true)
tc))
([^String server-ip]
(get-telnet server-ip 23)))
(defn kill-telnet
"disconnects telnet-client"
[^TelnetClient telnet-client]
(.disconnect telnet-client))
(defn read-until
"reads the input stream of a telnet client till it finds pattern"
[^TelnetClient telnet ^String pattern]
(let [in (.getInputStream telnet)]
(loop [result ""]
(let [s (char (.read in))]
(if (= s (last pattern))
(if (clojure.string/ends-with? (str result s) pattern)
(str result s)
(recur (str result s)))
(recur (str result s)))))))
(defn read-all
[^TelnetClient telnet]
"Attempts to read all the data from the telnet stream.
Should probably only be used in repl"
(let [in (.getInputStream telnet)]
(wait-for 10 1000 (fn [] (> (.available in) 0)))
(loop [result ""]
(if (or (> (.available in) 0) (wait-for 10 1000 (fn [] (> (.available in) 0))))
(recur (str result (char (.read in)))) result))))
(defn write
"writes to the output stream of a telnet client"
[^TelnetClient telnet ^String s]
(let [out (PrintStream. (.getOutputStream telnet))]
(doto out
(.println s)
(.flush))))
(defn with-telnet
[telnet f]
(try (f telnet)
(catch Exception e
(kill-telnet telnet)
(throw e))))