+ base64-file

base64-file/Base64File.java

@@ -0,0 +1,106 @@
+import java.io.*;
+import java.nio.file.*;
+import java.util.*;
+
+//----------------------------------------------------------------------------
+/**
+ * Base64 to file.
+ *
+ * <p>
+ * Written by CHEN Qingcan, Spring 2020, Foshan China <br>
+ * Open source under WTFPL (Do What The Fuck You Want To Public License) http://www.wtfpl.net
+ *
+ * <p>
+ * Run as script via Java 11: <br>
+ * <code>
+ * java Base64File.java
+ * </code>
+ */
+public final class Base64File {
+
+	static final BufferedReader stdin = new BufferedReader (new InputStreamReader (System.in));
+	static final PrintStream stdout = System.out;
+	static final PrintStream stderr = System.err;
+
+	static Config config = null;
+	static class  Config {
+		String    from;
+		Path      to;
+
+		//--------------------------------------------------------------------
+		static Config getInstance (final String... args) throws IOException {
+			return args.length >= 2 ? fromArgs (args) : fromStdIn ();
+		}
+
+		//--------------------------------------------------------------------
+		/** Get configuration from command line arguments. */
+		private static Config fromArgs (final String... args) {
+			assert args != null && args.length >= 2;
+			var config = new Config ();
+			config.from = args[0];
+			config.to   = Paths.get (args[1]);
+			return config;
+		}
+
+		//--------------------------------------------------------------------
+		/** Get configuration from standard input. */
+		private static Config fromStdIn () throws IOException {
+			var config = new Config ();
+
+			// from
+			stdout.print ("Base64 string or input file name: ");
+			config.from = stdin.readLine ().trim ();
+
+			// to
+			String prompt;
+			for (prompt = "" ; prompt.length () <= 0 ; prompt = stdin.readLine ().trim ()) {
+				stdout.print ("Output file name: ");
+			}
+			config.to = Paths.get (prompt);
+
+			return config;
+		}
+
+	}
+
+	//------------------------------------------------------------------------
+	/** Program entry */
+	public static void main (final String... args) {
+		try {
+			config = Config.getInstance (args);
+			var base64s = input ();
+			output (base64s);
+
+		} catch (IOException e) {
+			stderr.println (e.getMessage ());
+		}
+	}
+
+	//------------------------------------------------------------------------
+	private static String input () throws IOException {
+		var path = Paths.get (config.from);
+		if (Files.isReadable (path)) {
+			stdout.println ("Path found. Input treated as file name. Read Base64 string from it...");
+			return Files.readString (path).trim ();
+
+		} else {
+			stdout.println ("Path not found. Input treated as Base64 string.");
+			return config.from;
+		}
+	}
+
+	//------------------------------------------------------------------------
+	private static void output (final String base64s) throws IOException {
+		try {
+			var decoder = Base64.getDecoder();
+			byte[] base64 = decoder.decode (base64s);
+			Files.write (config.to, base64);
+			stdout.printf ("%d bytes written to output file %s%n", base64.length, config.to);
+
+		} catch (IllegalArgumentException e) {
+			stderr.println ("Input not in Base64 format: " + e.getMessage ());
+			System.exit (1);
+		}
+	}
+
+}

base64-file/FileBase64.java

@@ -0,0 +1,93 @@
+import java.io.*;
+import java.nio.file.*;
+import java.util.*;
+
+//----------------------------------------------------------------------------
+/**
+ * File to Base64.
+ *
+ * <p>
+ * Written by CHEN Qingcan, Spring 2020, Foshan China <br>
+ * Open source under WTFPL (Do What The Fuck You Want To Public License) http://www.wtfpl.net
+ *
+ * <p>
+ * Run as script via Java 11: <br>
+ * <code>
+ * java FileBase64.java
+ * </code>
+ */
+public final class FileBase64 {
+
+	static final BufferedReader stdin = new BufferedReader (new InputStreamReader (System.in));
+	static final PrintStream stdout = System.out;
+	static final PrintStream stderr = System.err;
+
+	static Config config = null;
+	static class  Config {
+		Path      from;
+		/** empty stands for output to console not to file */
+		String    to     = "";
+
+		//--------------------------------------------------------------------
+		static Config getInstance (final String... args) throws IOException {
+			return args.length >= 1 ? fromArgs (args) : fromStdIn ();
+		}
+
+		//--------------------------------------------------------------------
+		/** Get configuration from command line arguments. */
+		private static Config fromArgs (final String... args) {
+			assert args != null && args.length >= 1;
+			var config = new Config ();
+			config.from = Paths.get (args[0]);
+			if (args.length >= 2) {
+				config.to = args[1];
+			}
+			return config;
+		}
+
+		//--------------------------------------------------------------------
+		/** Get configuration from standard input. */
+		private static Config fromStdIn () throws IOException {
+			var config = new Config ();
+
+			// from
+			String prompt;
+			for (prompt = "" ; prompt.length () <= 0 ; prompt = stdin.readLine ().trim ()) {
+				stdout.print ("Input file name: ");
+			}
+			config.from = Paths.get (prompt);
+
+			// to
+			stdout.print ("Output file name (empty to console): ");
+			config.to = stdin.readLine ().trim ();
+
+			return config;
+		}
+
+	}
+
+	//------------------------------------------------------------------------
+	/** Program entry */
+	public static void main (final String... args) {
+		try {
+			config = Config.getInstance (args);
+			var b  = Files.readAllBytes (config.from);
+			output (b);
+
+		} catch (IOException e) {
+			stderr.println (e.getMessage ());
+		}
+	}
+
+	//------------------------------------------------------------------------
+	private static void output (final byte[] b) throws IOException {
+		var base64s = Base64.getEncoder().encodeToString (b);
+		if (config.to.length () <= 0) {
+			stdout.println (base64s);
+		} else {
+			Files.writeString (Path.of (config.to), base64s);
+			stdout.printf ("%d bytes written to output file %s%n", base64s.length (), config.to);
+		}
+	}
+
+}

base64-file/README.md

@@ -0,0 +1,47 @@
+| English |
+
+# base64-file
+Base64 to file and reverse.
+
+# System Requirements
+Java ≥ 11
+
+# Usage
+If no command line argument provided, it prompts to ask.
+
+Windows:
+```dos
+base64-file.bat [input Base64 string or file name] [output file name]
+file-base64.bat [input file name] [output file name or empty to console]
+```
+
+Linux:
+```bash
+./base64-file.sh [input Base64 string or file name] [output file name]
+./file-base64.sh [input file name] [output file name or empty to console]
+```
+
+- - - -
+
+| Chinese | 中文 |
+
+# base64-file
+Base64 转成文件，及其反方向转换。
+
+# 系统需求
+Java ≥ 11
+
+# 用法
+如无命令行参数，脚本将提示输入。
+
+Windows:
+```dos
+base64-file.bat [Base64 文字或输入文件名] [输出文件名]
+file-base64.bat [输入文件名] [输出文件名或留空表示输出至控制台]
+```
+
+Linux:
+```bash
+./base64-file.sh [Base64 文字或输入文件名] [输出文件名]
+./file-base64.sh [输入文件名] [输出文件名或留空表示输出至控制台]
+```

base64-file/base64-file.bat

@@ -0,0 +1,9 @@
+@echo off
+if defined JAVA_HOME (
+	set JAVA=%JAVA_HOME%\bin\java
+) else if defined JRE_HOME (
+	set JAVA=%JRE_HOME%\bin\java
+) else (
+	set JAVA=java
+)
+%JAVA% Base64File.java %*

base64-file/base64-file.sh

@@ -0,0 +1 @@
+java Base64File.java $*

base64-file/file-base64.bat

@@ -0,0 +1,9 @@
+@echo off
+if defined JAVA_HOME (
+	set JAVA=%JAVA_HOME%\bin\java
+) else if defined JRE_HOME (
+	set JAVA=%JRE_HOME%\bin\java
+) else (
+	set JAVA=java
+)
+%JAVA% FileBase64.java %*

base64-file/file-base64.sh

@@ -0,0 +1 @@
+java FileBase64.java $*