drop ExecNamingService, moving to i2p.scripts

core/java/src/net/i2p/client/naming/ExecNamingService.java

-/*
- * By zzz 2008, released into the public domain 
- * with no warranty of any kind, either expressed or implied.  
- */
-package net.i2p.client.naming;
-
-import java.io.InputStream;
-import java.util.Locale;
-import java.util.Properties;
-
-import net.i2p.I2PAppContext;
-import net.i2p.data.Destination;
-
-/**
- * An interface to an external naming service program, with in-memory caching.
- * This can be used as a simple and flexible way to experiment with
- * alternative naming systems.
- *
- * The external command takes a hostname argument and must return (only) the
- * 516-byte Base64 destination, or hostname=dest, on stdout.
- * A trailing \n or \r\n is acceptable.
- * The command must exit 0 on success. Nonzero on failure is optional.
- *
- * The external command can do local and/or remote (via i2p or not) lookups.
- * No timeouts are implemented here - the author of the external program
- * must ensure that the program returns in a reasonable amount of time -
- * (15 sec max suggested)
- *
- * Can be used from MetaNamingService, (e.g. after HostsTxtNamingService),
- * or as the sole naming service.
- * Supports caching, b32, and b64.
- *
- * Sample chained config to put in configadvanced.jsp (restart required):
- *
- * i2p.naming.impl=net.i2p.client.naming.MetaNamingService
- * i2p.nameservicelist=net.i2p.client.naming.HostsTxtNamingService,net.i2p.client.naming.ExecNamingService
- * i2p.naming.exec.command=/usr/local/bin/i2presolve
- *
- * Sample unchained config to put in configadvanced.jsp (restart required):
- *
- * i2p.naming.impl=net.i2p.client.naming.ExecNamingService
- * i2p.naming.exec.command=/usr/local/bin/i2presolve
- *
- */
-public class ExecNamingService extends DummyNamingService {
-
-    private final static String PROP_EXEC_CMD = "i2p.naming.exec.command";
-    private final static String DEFAULT_EXEC_CMD = "/usr/local/bin/i2presolve";
-    private final static String PROP_SHELL_CMD = "i2p.naming.exec.shell";
-    private final static String DEFAULT_SHELL_CMD = "/bin/bash";
-
-    /** 
-     * The naming service should only be constructed and accessed through the 
-     * application context.  This constructor should only be used by the 
-     * appropriate application context itself.
-     *
-     */
-    public ExecNamingService(I2PAppContext context) {
-        super(context);
-        // disable for now
-        throw new UnsupportedOperationException();
-    }
-    
-    @Override
-    public Destination lookup(String hostname, Properties lookupOptions, Properties storedOptions) {
-        Destination d = super.lookup(hostname, null, null);
-        if (d != null)
-            return d;
-        // Base32 failed?
-        if (hostname.length() == BASE32_HASH_LENGTH + 8 && hostname.toLowerCase(Locale.US).endsWith(".b32.i2p"))
-            return null;
-
-        hostname = hostname.toLowerCase(Locale.US);
-
-        // lookup
-        String key = fetchAddr(hostname);	  	
-        if (key != null) {
-            _log.error("Success: " + hostname);
-            d = lookupBase64(key);
-            putCache(hostname, d);
-            return d;
-        }
-        return null;
-    }
-
-    // FIXME allow larger Dests for non-null Certs
-    private static final int MAX_RESPONSE = DEST_SIZE + 68 + 10; // allow for hostname= and some trailing stuff
-    private String fetchAddr(String hostname) {
-        String[] commandArr = new String[3];
-        commandArr[0] = _context.getProperty(PROP_SHELL_CMD, DEFAULT_SHELL_CMD);
-        commandArr[1] = "-c";
-        String command = _context.getProperty(PROP_EXEC_CMD, DEFAULT_EXEC_CMD) + " " + hostname;
-        commandArr[2] = command;
-        
-        try {
-            Process get = Runtime.getRuntime().exec(commandArr);
-            get.waitFor();
-            int exitValue = get.exitValue();		
-            if (exitValue != 0) {
-                _log.error("Exit " + exitValue + " from " + commandArr[0] + " " + commandArr[1] + " \"" + command + "\"");
-                return null;
-            }
-            InputStream is = get.getInputStream();
-            byte[] input = new byte[MAX_RESPONSE];
-            int count = is.read(input);
-            is.close();
-            if (count < DEST_SIZE) {
-                _log.error("Short response: " + command);
-                return null;
-            }
-            String key = new String(input);
-            if (key.startsWith(hostname + "="))   // strip hostname=
-                key = key.substring(hostname.length() + 1); 
-            key = key.substring(0, DEST_SIZE);    // catch IndexOutOfBounds exception below
-            if (!key.endsWith("AA")) {
-                _log.error("Invalid key: " + command);
-                return null;
-            }
-            if (key.replaceAll("[a-zA-Z0-9~-]", "").length() != 0) {
-                _log.error("Invalid chars: " + command);
-                return null;
-            }
-            return key;
-        } catch (Throwable t) {
-            _log.error("Error fetching the addr", t);
-        }
-        return null;
-    }
-}