59 lines
2.1 KiB
Java
59 lines
2.1 KiB
Java
package in.wilsonl.minifyhtml;
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import java.io.File;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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import java.nio.file.Files;
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import java.nio.file.StandardCopyOption;
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import static java.lang.String.format;
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/**
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* Class containing only static methods and exception classes. Cannot be instantiated.
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* Methods call to native compiled Rust code using JNI.
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* When this class is loaded, a static initialiser will attempt to load a prebuilt native library for the running operating system and architecture from the JAR. If it cannot, a {@link RuntimeException} will be thrown.
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*/
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public class MinifyHtml {
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static {
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String osName = System.getProperty("os.name").toLowerCase();
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String osArch = System.getProperty("os.arch").toLowerCase();
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String nativeLibNameOs = osName.startsWith("windows")
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? "windows"
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: osName.startsWith("linux")
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? "linux"
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: osName.startsWith("mac")
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? "macos"
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: null;
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String nativeLibNameArch = osArch.equals("amd64") || osArch.equals("x86_64") ? "x86_64" : null;
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if (nativeLibNameOs == null || nativeLibNameArch == null) {
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throw new RuntimeException(format("Platform not supported (os.name=%s, os.arch=%s)", osName, osArch));
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}
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String nativeLibFile = format("/%s-%s.nativelib", nativeLibNameOs, nativeLibNameArch);
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try (InputStream is = MinifyHtml.class.getResourceAsStream(nativeLibFile)) {
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File temp = File.createTempFile("minify-html-java-nativelib", nativeLibFile.substring(1));
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temp.deleteOnExit();
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Files.copy(is, temp.toPath(), StandardCopyOption.REPLACE_EXISTING);
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System.load(temp.getAbsolutePath());
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} catch (Exception e) {
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throw new RuntimeException("Failed to load native library", e);
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}
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}
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private MinifyHtml() {
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}
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/**
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* Minify HTML code represented as a {@link String}.
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* The {@link String} will be copied to a UTF-8 byte array in native code, and then copied back into a Java {@link String}.
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*
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* @param code HTML code to minify
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* @param cfg {@link Configuration} minification settings to use
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* @return minified HTML code
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*/
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public static native String minify(String code, Configuration cfg);
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}
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