Extract lib module

[signal-cli] / lib / src / main / java / org / asamk / signal / manager / util / IOUtils.java

diff --git a/lib/src/main/java/org/asamk/signal/manager/util/IOUtils.java b/lib/src/main/java/org/asamk/signal/manager/util/IOUtils.java
new file mode 100644 (file)
index 0000000..8f47c9f
--- /dev/null
+++ b/lib/src/main/java/org/asamk/signal/manager/util/IOUtils.java
@@ -0,0 +1,76 @@
+package org.asamk.signal.manager.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.EnumSet;
+import java.util.Set;
+
+import static java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE;
+import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
+import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
+
+public class IOUtils {
+
+    public static File createTempFile() throws IOException {
+        final File tempFile = File.createTempFile("signal-cli_tmp_", ".tmp");
+        tempFile.deleteOnExit();
+        return tempFile;
+    }
+
+    public static byte[] readFully(InputStream in) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        IOUtils.copyStream(in, baos);
+        return baos.toByteArray();
+    }
+
+    public static void createPrivateDirectories(File file) throws IOException {
+        if (file.exists()) {
+            return;
+        }
+
+        final Path path = file.toPath();
+        try {
+            Set<PosixFilePermission> perms = EnumSet.of(OWNER_READ, OWNER_WRITE, OWNER_EXECUTE);
+            Files.createDirectories(path, PosixFilePermissions.asFileAttribute(perms));
+        } catch (UnsupportedOperationException e) {
+            Files.createDirectories(path);
+        }
+    }
+
+    public static void createPrivateFile(File path) throws IOException {
+        final Path file = path.toPath();
+        try {
+            Set<PosixFilePermission> perms = EnumSet.of(OWNER_READ, OWNER_WRITE);
+            Files.createFile(file, PosixFilePermissions.asFileAttribute(perms));
+        } catch (UnsupportedOperationException e) {
+            Files.createFile(file);
+        }
+    }
+
+    public static void copyFileToStream(File inputFile, OutputStream output) throws IOException {
+        try (InputStream inputStream = new FileInputStream(inputFile)) {
+            copyStream(inputStream, output);
+        }
+    }
+
+    public static void copyStream(InputStream input, OutputStream output) throws IOException {
+        copyStream(input, output, 4096);
+    }
+
+    public static void copyStream(InputStream input, OutputStream output, int bufferSize) throws IOException {
+        byte[] buffer = new byte[bufferSize];
+        int read;
+
+        while ((read = input.read(buffer)) != -1) {
+            output.write(buffer, 0, read);
+        }
+    }
+}