Cerl: PHP or Python server that calls C ++ implementation

Two days on the weekend, I wrote a php_cerl module one day to complete the PHP client of cerl. I wrote a pycerl module one day to complete the python client of cerl. The C ++ server can be called using PHP or Python.

 

For the hashserver we previously wrote with cerl (for a very simple example, see Erlang vs. cerl-cerl Introduction), the PHP client sample is as follows:

<? Php <br/> define ('hashsever _ put', 1); <br/> define ('hashsever _ get', 2 ); </P> <p> If (! Extension_loaded ('php _ cerl ') {<br/> If (! DL ('php _ cerl. '. php_shlib_suffix) <br/> die ("error: cannot load php_cerl library! /N "); <br/>}</P> <p> cerl_thread_init (); </P> <p> $ Server = cerl_connect ('localhost: 100 ', 'hashserver'); <br/> If (! $ Server) <br/> die ("error: connect hashsever failed! /N "); </P> <p> printf (<br/>" + ---------------------------------------------------------/N ". <br/> "| put <key> <value>-put (Key, value)/n ". <br/> "| get <key>-Get value of a key/N ". <br/> "| Q-Quit/N ". <br/> "+ ---------------------------------------------------------/N"); </P> <p> for (;) <br/>{< br/> echo "/n> "; <br/> List ($ cmd, $ key, $ value) = fscanf (stdin, '% S % d % D '); <br/> if ($ cmd = 'get' | | $ Cmd = 'G') <br/>{< br/> $ ret = $ server-> call (hashsever_get, $ key ); <br/> if ($ RET [0] = code_ OK) <br/> echo "Result: $ RET [1]/n "; <br/> else <br/> echo "error: $ RET [0]/n "; <br/>}< br/> else if ($ cmd = 'put' | $ cmd = 'P ') <br/>{< br/> $ ret = $ server-> call (hashsever_put, $ key, $ value ); <br/> if ($ RET [0] = code_ OK) <br/> echo "OK! /N "; <br/> else <br/> echo" error: $ RET [0]/n "; <br/>}< br/> else if ($ cmd = 'q') <br/>{< br/> break; <br/>}< br/> else <br/> {<br/> echo "Unknown command! /N "; <br/>}</P> <p> cerl_thread_term (); <br/>?> <Br/>

 

The following is a sample client written in Python:

Hashsever_put = 1 <br/> hashsever_get = 2 </P> <p> Import sys, pycerl </P> <p> pycerl. thread_init () </P> <p> Server = pycerl. connect ("localhost: 8889", "hashserver") <br/> if not server: <br/> Print "error: connect hashsever failed! "</P> <p> else: <br/> Print" + ------------------------------------------------------- "<br/> Print" | put <key> <value>-put (Key, value) "<br/> Print" | get <key>-Get value of a key "<br/> Print" | Q-Quit "<br/> Print" + ----------------------------------------------- "<br/> Print" | /P> <p> while true: </P> <p> sys. stdout. write ("/n>") </P> <p> input = sys. stdin. readline (). split () <br/> cmd = input [0] </P> <p> If cmd = "get" or cmd = "G": <br/> If Len (input) <2: <br/> continue <br/> key = int (input [1], 10) <br/> ret = server. call (hashsever_get, key) <br/> If RET [0] = pycerl. code_ OK: <br/> Print "Result:", RET [1] <br/> else: <br/> Print "error :", RET [0] </P> <p> Elif cmd = "put" or cmd = "p": <br/> If Len (input) <3: <br/> continue <br/> key = int (input [1], 10) <br/> value = int (input [2], 10) <br/> ret = server. c All (hashsever_put, key, value) <br/> If RET [0] = pycerl. code_ OK: <br/> Print "OK! "<Br/> else: <br/> Print" error: ", RET [0] </P> <p> Elif cmd =" Q ": <br/> Break </P> <p> else: <br/> Print "Unknown command! "</P> <p> pycerl. thread_term () <br/>

 

It is worth noting that we have not used a compiler to generate PHP/Python proxy code for SDL translation like C/C ++. This is the advantage of Dynamic Language. Even if there is no proxy, its code still looks very elegant (but speaking back, C ++ can actually do it, But it slightly loses some performance ).