nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/util/IOUtils.java

   1 package org.asamk.signal.util;
   2
   3 import org.asamk.signal.commands.exceptions.IOErrorException;
   4 import org.asamk.signal.commands.exceptions.UserErrorException;
   5 import org.slf4j.Logger;
   6 import org.slf4j.LoggerFactory;
   7
   8 import java.io.BufferedReader;
   9 import java.io.File;
  10 import java.io.IOException;
  11 import java.io.InputStream;
  12 import java.io.Reader;
  13 import java.io.StringWriter;
  14 import java.net.InetSocketAddress;
  15 import java.net.SocketAddress;
  16 import java.net.StandardProtocolFamily;
  17 import java.net.UnixDomainSocketAddress;
  18 import java.nio.channels.ServerSocketChannel;
  19 import java.nio.channels.SocketChannel;
  20 import java.nio.charset.Charset;
  21 import java.nio.file.Files;
  22 import java.nio.file.attribute.PosixFilePermission;
  23 import java.nio.file.attribute.PosixFilePermissions;
  24 import java.util.EnumSet;
  25 import java.util.Set;
  26 import java.util.function.Supplier;
  27
  28 import jdk.net.ExtendedSocketOptions;
  29 import jdk.net.UnixDomainPrincipal;
  30
  31 import static java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE;
  32 import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
  33 import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
  34
  35 public class IOUtils {
  36
  37     private final static Logger logger = LoggerFactory.getLogger(IOUtils.class);
  38
  39     private IOUtils() {
  40     }
  41
  42     public static String readAll(InputStream in, Charset charset) throws IOException {
  43         var output = new StringWriter();
  44         var buffer = new byte[4096];
  45         int n;
  46         while (-1 != (n = in.read(buffer))) {
  47             output.write(new String(buffer, 0, n, charset));
  48         }
  49         return output.toString();
  50     }
  51
  52     public static void createPrivateDirectories(File file) throws IOException {
  53         if (file.exists()) {
  54             return;
  55         }
  56
  57         final var path = file.toPath();
  58         try {
  59             Set<PosixFilePermission> perms = EnumSet.of(OWNER_READ, OWNER_WRITE, OWNER_EXECUTE);
  60             Files.createDirectories(path, PosixFilePermissions.asFileAttribute(perms));
  61         } catch (UnsupportedOperationException e) {
  62             Files.createDirectories(path);
  63         }
  64     }
  65
  66     public static File getDataHomeDir() {
  67         var dataHome = System.getenv("XDG_DATA_HOME");
  68         if (dataHome != null) {
  69             return new File(dataHome);
  70         }
  71
  72         logger.debug("XDG_DATA_HOME not set, falling back to home dir");
  73         return new File(new File(System.getProperty("user.home"), ".local"), "share");
  74     }
  75
  76     public static File getRuntimeDir() {
  77         var runtimeDir = System.getenv("XDG_RUNTIME_DIR");
  78         if (runtimeDir != null) {
  79             return new File(runtimeDir);
  80         }
  81
  82         logger.debug("XDG_RUNTIME_DIR not set, falling back to temp dir");
  83         return new File(System.getProperty("java.io.tmpdir"));
  84     }
  85
  86     public static Supplier<String> getLineSupplier(final Reader reader) {
  87         final var bufferedReader = new BufferedReader(reader);
  88         return () -> {
  89             try {
  90                 return bufferedReader.readLine();
  91             } catch (IOException e) {
  92                 logger.error("Error occurred while reading line", e);
  93                 return null;
  94             }
  95         };
  96     }
  97
  98     public static InetSocketAddress parseInetSocketAddress(final String tcpAddress) throws UserErrorException {
  99         final var colonIndex = tcpAddress.lastIndexOf(':');
 100         if (colonIndex < 0) {
 101             throw new UserErrorException("Invalid tcp bind address (expected host:port): " + tcpAddress);
 102         }
 103         final var host = tcpAddress.substring(0, colonIndex);
 104         final var portString = tcpAddress.substring(colonIndex + 1);
 105
 106         final int port;
 107         try {
 108             port = Integer.parseInt(portString);
 109         } catch (NumberFormatException e) {
 110             throw new UserErrorException("Invalid tcp port: " + portString, e);
 111         }
 112         final var socketAddress = new InetSocketAddress(host, port);
 113         if (socketAddress.isUnresolved()) {
 114             throw new UserErrorException("Invalid tcp bind address, invalid host: " + host);
 115         }
 116         return socketAddress;
 117     }
 118
 119     public static UnixDomainPrincipal getUnixDomainPrincipal(final SocketChannel channel) throws IOException {
 120         UnixDomainPrincipal principal = null;
 121         try {
 122             principal = channel.getOption(ExtendedSocketOptions.SO_PEERCRED);
 123         } catch (UnsupportedOperationException ignored) {
 124         }
 125         return principal;
 126     }
 127
 128     public static ServerSocketChannel bindSocket(final SocketAddress address) throws IOErrorException {
 129         final ServerSocketChannel serverChannel;
 130         try {
 131             preBind(address);
 132             serverChannel = address instanceof UnixDomainSocketAddress
 133                     ? ServerSocketChannel.open(StandardProtocolFamily.UNIX)
 134                     : ServerSocketChannel.open();
 135             serverChannel.bind(address);
 136             logger.info("Listening on socket: " + address);
 137             postBind(address);
 138         } catch (IOException e) {
 139             throw new IOErrorException("Failed to bind socket " + address + ": " + e.getMessage(), e);
 140         }
 141         return serverChannel;
 142     }
 143
 144     private static void preBind(SocketAddress address) throws IOException {
 145         if (address instanceof UnixDomainSocketAddress usa) {
 146             createPrivateDirectories(usa.getPath().toFile().getParentFile());
 147         }
 148     }
 149
 150     private static void postBind(SocketAddress address) {
 151         if (address instanceof UnixDomainSocketAddress usa) {
 152             usa.getPath().toFile().deleteOnExit();
 153         }
 154     }
 155 }