inital commit

2021-11-02 13:38:59 -05:00
commit 01dd8525b1
65 changed files with 5267 additions and 0 deletions
@@ -0,0 +1,144 @@
+package com.reliancy.util;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.Reader;
+import java.io.Writer;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+
+public class Resources {
+    public static interface PathRewrite{
+        public String rewritePath(String path,Object context);
+    }
+    public static URL findFirst(PathRewrite remap,String path,Object ... sp){
+        for(Object base:sp){
+            if(remap!=null) path=remap.rewritePath(path,base);
+            if(base instanceof Class){
+                URL ret=((Class<?>)base).getResource(path);
+                return ret;
+            }else if(base instanceof String){
+                File ff=new File(base.toString(),path);
+                if(ff.exists()){
+                    try {
+                        return ff.toURI().toURL();
+                    } catch (MalformedURLException e) {
+                        continue;
+                    }
+                }
+            }else if(base instanceof File){
+                File ff=new File((File)base,path);
+                if(ff.exists()){
+                    try {
+                        return ff.toURI().toURL();
+                    } catch (MalformedURLException e) {
+                        continue;
+                    }
+                }
+            }else if(base instanceof URL){
+                try {
+                    URL ret=new URL((URL)base,path);
+                    String proto=ret.getProtocol();
+                    if(proto.equals("http") || proto.equals("https")){
+                        HttpURLConnection huc = (HttpURLConnection) ret.openConnection();
+                        huc.setRequestMethod("HEAD");
+                        int responseCode = huc.getResponseCode();
+                        huc.disconnect();
+                        if(responseCode==HttpURLConnection.HTTP_OK) return ret;
+                    }
+                    if(proto.equals("file")){
+                        File f=new File(ret.getPath());
+                        if(f.exists()) return ret;
+                    }
+                } catch (MalformedURLException e) {
+                    continue;
+                } catch (IOException e2) {
+                    continue;
+                }
+            }
+        }
+        return null;
+    }
+    public static String toString(URL url) throws IOException{
+        return toString(url,StandardCharsets.UTF_8);
+    }
+    public static String toString(URL url,Charset chs) throws IOException{
+        try(InputStream is=url.openStream()){
+            return readChars(is,chs).toString();
+        }
+    }
+    public static byte[] toBytes(URL url) throws IOException{
+        try(InputStream is=url.openStream()){
+            return readBytes(is);
+        }
+    }
+    public static long copy(InputStream input, OutputStream output, byte[] buffer) throws IOException {
+        long count = 0;
+        int n = 0;
+        while (-1 != (n = input.read(buffer))) {
+            output.write(buffer, 0, n);
+            count += n;
+        }
+        return count;
+    }
+    public static long copy(Reader input, Writer output, char[] buffer) throws IOException {
+        long count = 0;
+        int n = 0;
+        while (-1 != (n = input.read(buffer))) {
+            output.write(buffer, 0, n);
+            count += n;
+        }
+        return count;
+    }
+
+	/** Reads a stream in one pass and returns bytes.
+	 * Uses internally Handy.copy and a 4K buffer.
+	 */
+	public static final byte[] readBytes(InputStream str) throws IOException{
+		ByteArrayOutputStream bout=new ByteArrayOutputStream();
+		Resources.copy(str, bout, new byte[4096]);
+		return bout.toByteArray();
+	}
+	public static final CharSequence readChars(InputStream str) throws IOException{
+		return readChars(str,StandardCharsets.UTF_8);
+	}
+	public static final CharSequence readChars(InputStream str,Charset chset) throws IOException{
+			BufferedReader rdr=new BufferedReader(new InputStreamReader(str,chset));
+			StringBuilder ret=new StringBuilder();
+			for(String line=rdr.readLine();line!=null;line=rdr.readLine()){
+				ret.append(line).append("\n");
+			}
+			return ret;
+	}
+	public static CharSequence readChars(Class<?> cls,String name){
+		InputStream io=cls.getResourceAsStream(name);
+		try{
+			return readChars(io);
+		}catch(Exception e){
+			return null;
+		}finally{
+			if(io!=null) try{io.close();}catch(Exception e){}
+		}
+	}
+	public static void writeChars(CharSequence seq,OutputStream out,Charset chset) throws IOException{
+		OutputStreamWriter dout=new OutputStreamWriter(out,chset);
+		dout.append(seq);
+		dout.flush();
+	}
+	public static void writeChars(CharSequence seq,OutputStream out) throws IOException{
+		writeChars(seq,out,StandardCharsets.UTF_8);
+	}
+	public static void writeBytes(int offset,int len,byte[] seq,OutputStream out) throws IOException{
+		out.write(seq,offset, len);
+	}
+
+}