package com.netsdk.lib;
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import com.netsdk.lib.DynamicParseUtil;
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import java.io.*;
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/**
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* @author 47081
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* @version 1.0
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* @description 动态库加载
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* @date 2020/11/14
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*/
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public class LibraryLoad {
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private static final String ARCH_WINDOWS = "win";
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private static final String ARCH_LINUX = "linux";
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private static final String ARCH_MAC = "mac";
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private static final int PREFIX_64 = 64;
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private static final int PREFIX_32 = 32;
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private static final String PREFIX_ARM = "ARM";
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private static final String EXTERNAL_WIN = ".dll";
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private static final String EXTERNAL_LINUX = ".so";
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private static final String EXTERNAL_MAC = ".dylib";
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private static DynamicParseUtil dynamicParseUtil;
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/** 当前读取的目录 */
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private static String currentFold;
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/** 动态库需要写入的目录 */
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private static String EXTRACT_PATH = System.getProperty("java.io.tmpdir");
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private static boolean written = false;
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/**
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* 设置动态库写入的路径,适用于需要自定义加载路径的用户
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*
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* @param path 动态库写入的文件夹,从该文件夹下加载sdk的动态库
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*/
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public static void setExtractPath(String path) {
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EXTRACT_PATH = path;
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}
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public static String getExtractPath() {
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return EXTRACT_PATH;
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}
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/** 动态库路径 */
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private static String INNER_PATH;
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// private static final String EXTERNAL_MAC = ".so";
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private static String extractNetSDKLib(String libName) {
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return extractLibrary(libName);
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}
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public static String getLoadLibrary(String libraryName) {
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currentFold = getLibraryFold();
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if (dynamicParseUtil == null) {
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try {
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dynamicParseUtil =
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new DynamicParseUtil(
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LibraryLoad.class.getClassLoader().getResourceAsStream("dynamic-lib-load.xml"));
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if (!written) {
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for (String libName : dynamicParseUtil.getLibsSystem(currentFold)) {
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extractLibrary(libName);
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}
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written = true;
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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String fullName = getLibraryName(libraryName);
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String path = EXTRACT_PATH;
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if (!(EXTRACT_PATH.endsWith("/") || EXTRACT_PATH.endsWith("\\"))) {
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path = EXTRACT_PATH + "/";
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}
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System.out.println("load library: " + path + fullName);
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return path + fullName;
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}
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/**
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* 将jar包里的动态库写入到系统缓存目录,使用绝对路径加载动态库
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*
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* @param libName
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* @return
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*/
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private static String extractLibrary(String libName) {
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return extractLibrary("", libName);
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}
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/**
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* 相对路径文件夹
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*
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* @param relativePath 相对路径
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* @param libName 动态库路径
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* @return
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*/
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private static String extractLibrary(String relativePath, String libName) {
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if (libName.trim().equals("")) {
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return "";
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}
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String libFullName = getLibraryName(libName);
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String dir = getLibraryFold();
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if (!(relativePath.endsWith("/") || relativePath.endsWith("\\"))) {
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relativePath = relativePath + "/";
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}
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String fileName = relativePath + dir + "/" + libFullName;
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InputStream in = LibraryLoad.class.getResourceAsStream(fileName);
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BufferedInputStream reader;
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FileOutputStream writer;
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File extractedLibFile = null;
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try {
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if (in == null) {
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in = new FileInputStream(fileName);
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}
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String nativeTempDir = EXTRACT_PATH;
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if (!(nativeTempDir.endsWith("/") || nativeTempDir.endsWith("\\"))) {
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nativeTempDir = nativeTempDir + "/";
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}
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extractedLibFile = new File(nativeTempDir + libFullName);
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reader = new BufferedInputStream(in);
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writer = new FileOutputStream(extractedLibFile);
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byte[] buffer = new byte[1024];
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while (true) {
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int len = reader.read(buffer);
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if (len == 0 || len == -1) break;
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writer.write(buffer, 0, len);
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}
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reader.close();
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writer.close();
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in.close();
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} catch (Exception e) {
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//System.out.println("dynamic file[ "+ fileName+ " ] not found in project.please ensure you need this library.");
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}
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return extractedLibFile != null ? extractedLibFile.getAbsolutePath() : "";
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}
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/**
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* 获取动态库完整名称
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*
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* @param libName
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* @return
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*/
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private static String getLibraryName(String libName) {
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String dir = currentFold;
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String libPrefix = "";
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String libExtension = EXTERNAL_WIN;
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if (!dir.contains("win")) {
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libPrefix = "lib";
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if (dir.contains("linux")) {
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libExtension = EXTERNAL_LINUX;
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} else {
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// libExtension=".dylib";
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libExtension = EXTERNAL_MAC;
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}
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}
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libName = dynamicParseUtil.compareLibName(currentFold, libName);
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// 动态库以lib开头，则不添加lib前缀
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// 以lib开头的库则不添加lib前缀
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return (libName.startsWith("lib") ? "" : libPrefix) + libName + libExtension;
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}
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// 获取系统对应的动态库文件夹
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private static String getLibraryFold() {
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String osType;
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String osName = System.getProperty("os.name");
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if (osName.toLowerCase().startsWith("linux")) {
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osType = ARCH_LINUX;
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} else if (osName.toLowerCase().startsWith("mac")
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|| osName.toLowerCase().startsWith("darwin")) {
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osType = ARCH_MAC;
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} else if (osName.toLowerCase().startsWith("windows")) {
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osType = ARCH_WINDOWS;
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} else {
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osType = "";
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}
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String arch = System.getProperty("os.arch");
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arch = arch.toLowerCase().trim();
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if ("i386".equals(arch) || "i686".equals(arch)||"x86".equals(arch)) {
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arch = PREFIX_32 + "";
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} else if ("x86_64".equals(arch) || "amd64".equals(arch)) {
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arch = PREFIX_64 + "";
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} else if (arch.startsWith("arm")) {
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arch = PREFIX_ARM + "";
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}
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return osType + arch;
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}
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}
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