360 lines
14 KiB
Java
360 lines
14 KiB
Java
package me.totalfreedom.totalfreedommod.httpd.module;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.StringTokenizer;
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import me.totalfreedom.totalfreedommod.config.ConfigEntry;
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import me.totalfreedom.totalfreedommod.httpd.HTTPDaemon;
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import me.totalfreedom.totalfreedommod.httpd.NanoHTTPD;
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import me.totalfreedom.totalfreedommod.httpd.NanoHTTPD.Response;
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import org.apache.commons.lang3.StringUtils;
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/*
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* This class was adapted from https://github.com/NanoHttpd/nanohttpd/blob/master/webserver/src/main/java/fi/iki/elonen/SimpleWebServer.java
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*/
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public class Module_file extends HTTPDModule
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{
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public static final Map<String, String> MIME_TYPES = new HashMap<>();
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static
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{
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MIME_TYPES.put("css", "text/css");
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MIME_TYPES.put("htm", "text/html");
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MIME_TYPES.put("html", "text/html");
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MIME_TYPES.put("xml", "text/xml");
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MIME_TYPES.put("java", "text/x-java-source, text/java");
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MIME_TYPES.put("txt", "text/plain");
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MIME_TYPES.put("asc", "text/plain");
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MIME_TYPES.put("yml", "text/yaml");
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MIME_TYPES.put("gif", "image/gif");
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MIME_TYPES.put("jpg", "image/jpeg");
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MIME_TYPES.put("jpeg", "image/jpeg");
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MIME_TYPES.put("png", "image/png");
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MIME_TYPES.put("mp3", "audio/mpeg");
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MIME_TYPES.put("m3u", "audio/mpeg-url");
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MIME_TYPES.put("mp4", "video/mp4");
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MIME_TYPES.put("ogv", "video/ogg");
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MIME_TYPES.put("flv", "video/x-flv");
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MIME_TYPES.put("mov", "video/quicktime");
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MIME_TYPES.put("swf", "application/x-shockwave-flash");
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MIME_TYPES.put("js", "application/javascript");
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MIME_TYPES.put("pdf", "application/pdf");
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MIME_TYPES.put("doc", "application/msword");
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MIME_TYPES.put("ogg", "application/x-ogg");
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MIME_TYPES.put("zip", "application/octet-stream");
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MIME_TYPES.put("exe", "application/octet-stream");
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MIME_TYPES.put("class", "application/octet-stream");
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}
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private final File rootDir = new File(ConfigEntry.HTTPD_PUBLIC_FOLDER.getString());
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public Module_file(NanoHTTPD.HTTPSession session)
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{
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super(session);
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}
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private File getRootDir()
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{
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return rootDir;
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}
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private String encodeUri(String uri)
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{
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StringBuilder newUri = new StringBuilder();
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StringTokenizer st = new StringTokenizer(uri, "/ ", true);
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while (st.hasMoreTokens())
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{
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String tok = st.nextToken();
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if (tok.equals("/"))
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{
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newUri.append("/");
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}
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else if (tok.equals(" "))
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{
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newUri.append("%20");
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}
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else
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{
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newUri.append(URLEncoder.encode(tok, StandardCharsets.UTF_8));
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}
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}
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return newUri.toString();
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}
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public Response serveFile(String uri, Map<String, String> params, File homeDir)
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{
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Response res = null;
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// Make sure we won't die of an exception later
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if (!homeDir.isDirectory())
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{
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res = new Response(Response.Status.INTERNAL_ERROR, NanoHTTPD.MIME_PLAINTEXT, "INTERNAL ERRROR: serveFile(): given homeDir is not a directory.");
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}
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if (res == null)
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{
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// Remove URL arguments
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uri = uri.trim().replace(File.separatorChar, '/');
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if (uri.indexOf('?') >= 0)
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{
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uri = uri.substring(0, uri.indexOf('?'));
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}
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// Prohibit getting out of current directory
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if (uri.startsWith("src/main") || uri.endsWith("src/main") || uri.contains("../"))
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{
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res = new Response(Response.Status.FORBIDDEN, NanoHTTPD.MIME_PLAINTEXT, "FORBIDDEN: Won't serve ../ for security reasons.");
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}
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}
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File f = new File(homeDir, uri);
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if (res == null && !f.exists())
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{
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res = new Response(Response.Status.NOT_FOUND, NanoHTTPD.MIME_PLAINTEXT, "Error 404, file not found.");
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}
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// List the directory, if necessary
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if (res == null && f.isDirectory())
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{
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// Browsers get confused without '/' after the
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// directory, send a redirect.
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if (!uri.endsWith("/"))
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{
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uri += "/";
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res = new Response(Response.Status.REDIRECT, NanoHTTPD.MIME_HTML, "<html><body>Redirected: <a href=\"" + uri + "\">" + uri
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+ "</a></body></html>");
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res.addHeader("Location", uri);
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}
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if (res == null)
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{
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// First try index.html and index.htm
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if (new File(f, "index.html").exists())
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{
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f = new File(homeDir, uri + "/index.html");
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}
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else if (new File(f, "index.htm").exists())
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{
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f = new File(homeDir, uri + "/index.htm");
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}
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else if (f.canRead())
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{
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// No index file, list the directory if it is readable
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res = new Response(listDirectory(uri, f));
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}
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else
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{
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res = new Response(Response.Status.FORBIDDEN, NanoHTTPD.MIME_PLAINTEXT, "FORBIDDEN: No directory listing.");
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}
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}
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}
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try
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{
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if (res == null)
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{
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// Get MIME type from file name extension, if possible
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String mime = null;
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int dot = f.getCanonicalPath().lastIndexOf('.');
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if (dot >= 0)
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{
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mime = MIME_TYPES.get(f.getCanonicalPath().substring(dot + 1).toLowerCase());
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}
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if (mime == null)
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{
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mime = HTTPDaemon.MIME_DEFAULT_BINARY;
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}
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// Calculate etag
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String etag = Integer.toHexString((f.getAbsolutePath() + f.lastModified() + "" + f.length()).hashCode());
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final long fileLen = f.length();
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long startFrom = 0;
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long endAt = -1;
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final String range = params.get("range");
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if (range != null)
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{
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final String[] rangeParams = StringUtils.split(range, "=");
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if (rangeParams.length >= 2)
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{
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if ("bytes".equalsIgnoreCase(rangeParams[0]))
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{
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try
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{
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int minus = rangeParams[1].indexOf('-');
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if (minus > 0)
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{
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startFrom = Long.parseLong(rangeParams[1].substring(0, minus));
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endAt = Long.parseLong(rangeParams[1].substring(minus + 1));
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}
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}
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catch (NumberFormatException ignored)
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{
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}
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}
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else if ("tail".equalsIgnoreCase(rangeParams[0]))
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{
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try
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{
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final long tailLen = Long.parseLong(rangeParams[1]);
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if (tailLen < fileLen)
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{
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startFrom = fileLen - tailLen - 2;
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if (startFrom < 0)
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{
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startFrom = 0;
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}
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}
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}
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catch (NumberFormatException ignored)
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{
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}
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}
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}
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}
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// Change return code and add Content-Range header when skipping is requested
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if (range != null && startFrom >= 0)
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{
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if (startFrom >= fileLen)
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{
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res = new Response(Response.Status.RANGE_NOT_SATISFIABLE, NanoHTTPD.MIME_PLAINTEXT, "");
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res.addHeader("Content-Range", "bytes 0-0/" + fileLen);
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}
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else
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{
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if (endAt < 0)
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{
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endAt = fileLen - 1;
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}
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long newLen = endAt - startFrom + 1;
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if (newLen < 0)
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{
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newLen = 0;
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}
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final long dataLen = newLen;
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FileInputStream fis = new FileInputStream(f)
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{
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@Override
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public int available()
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{
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return (int)dataLen;
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}
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};
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//noinspection ResultOfMethodCallIgnored
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fis.skip(startFrom);
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res = new Response(Response.Status.PARTIAL_CONTENT, mime, fis);
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res.addHeader("Content-Length", "" + dataLen);
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res.addHeader("Content-Range", "bytes " + startFrom + "-" + endAt + "/" + fileLen);
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}
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}
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else
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{
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res = new Response(Response.Status.OK, mime, new FileInputStream(f));
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res.addHeader("Content-Length", "" + fileLen);
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}
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res.addHeader("ETag", etag);
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}
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}
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catch (IOException ioe)
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{
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res = new Response(Response.Status.FORBIDDEN, NanoHTTPD.MIME_PLAINTEXT, "FORBIDDEN: Reading file failed.");
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}
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res.addHeader("Accept-Ranges", "bytes"); // Announce that the file server accepts partial content requestes
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return res;
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}
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private String listDirectory(String uri, File f)
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{
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String heading = "Directory " + uri;
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StringBuilder msg = new StringBuilder("<html><head><title>" + heading + "</title><style><!--\n"
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+ "span.dirname { font-weight: bold; }\n"
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+ "span.filesize { font-size: 75%; }\n"
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+ "// -->\n"
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+ "</style>"
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+ "</head><body><h1>" + heading + "</h1>");
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String up = null;
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if (uri.length() > 1)
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{
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String u = uri.substring(0, uri.length() - 1);
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int slash = u.lastIndexOf('/');
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if (slash >= 0 && slash < u.length())
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{
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up = uri.substring(0, slash + 1);
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}
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}
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List<String> files = Arrays.asList(f.list((dir, name) -> new File(dir, name).isFile()));
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Collections.sort(files);
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List<String> directories = Arrays.asList(f.list((dir, name) -> new File(dir, name).isDirectory()));
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Collections.sort(directories);
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if (up != null || directories.size() + files.size() > 0)
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{
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msg.append("<ul>");
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if (up != null || directories.size() > 0)
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{
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msg.append("<section class=\"directories\">");
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if (up != null)
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{
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msg.append("<li><a rel=\"directory\" href=\"").append(up).append("\"><span class=\"dirname\">..</span></a></b></li>");
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}
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for (String directory : directories)
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{
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String dir = directory + "/";
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msg.append("<li><a rel=\"directory\" href=\"").append(encodeUri(uri + dir)).append("\"><span class=\"dirname\">").append(dir).append("</span></a></b></li>");
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}
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msg.append("</section>");
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}
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if (files.size() > 0)
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{
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msg.append("<section class=\"files\">");
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for (String file : files)
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{
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msg.append("<li><a href=\"").append(encodeUri(uri + file)).append("\"><span class=\"filename\">").append(file).append("</span></a>");
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File curFile = new File(f, file);
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long len = curFile.length();
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msg.append(" <span class=\"filesize\">(");
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if (len < 1024)
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{
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msg.append(len).append(" bytes");
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}
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else if (len < 1024 * 1024)
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{
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msg.append(len / 1024).append(".").append(len % 1024 / 10 % 100).append(" KB");
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}
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else
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{
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msg.append(len / (1024 * 1024)).append(".").append(len % (1024 * 1024) / 10 % 100).append(" MB");
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}
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msg.append(")</span></li>");
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}
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msg.append("</section>");
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}
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msg.append("</ul>");
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}
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msg.append("</body></html>");
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return msg.toString();
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}
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@Override
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public Response getResponse()
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{
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return serveFile(uri, params, getRootDir());
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}
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}
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