Where people come together to learn, code, and play. Custom-built HTTP server, site generator, and website from scratch using no external libraries. Goal is to be as minimalistic and fun as possible.
http://projectdivar.com
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230 lines
14 KiB
230 lines
14 KiB
import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.net.ServerSocket;
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import java.net.Socket;
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import java.net.SocketException;
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import java.net.URLDecoder;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.nio.file.attribute.FileTime;
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import java.time.Instant;
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import java.time.ZoneId;
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import java.time.ZonedDateTime;
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import java.time.format.DateTimeFormatter;
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import java.time.temporal.ChronoUnit;
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import java.util.HashMap;
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import java.util.regex.Pattern;
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public class sigServer {
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ServerSocket socket;
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sigServer() {
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try {
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socket = new ServerSocket(sigPlace.PORT);
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System.out.println("Listening on port "+sigPlace.PORT+".");
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while (true) {
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try (Socket client = socket.accept()) {
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System.out.println("New client connection detected: "+client.toString());
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BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream(),"ISO-8859-1"));
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String requestLine,line;
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ZonedDateTime modifiedDate = null;
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String boundary=null;
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boolean truncateUntilBoundary=false;
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String filename=null;
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OutputStream stream = null;
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requestLine=in.readLine(); //Read the first line, this should be our request.
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if (requestLine!=null) {
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String[] splitter = requestLine.split(Pattern.quote(" "));
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boolean ISPOST = splitter[0].equals("POST");
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if (splitter.length==3) {
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while (in.ready()) {
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line=in.readLine();
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if (ISPOST) {
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if (boundary!=null) {
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if (!truncateUntilBoundary) {
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System.out.println(line);
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if (boundary.length()>0) {
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if (line.equals(boundary)) {
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truncateUntilBoundary=true;
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}
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}
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} else
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if (line.contains("Content-Disposition: ")||line.contains("Content-Type: ")) {
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if (line.contains("filename=")) {
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filename=line.substring(line.indexOf("filename=")+"filename=".length()+1);
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filename = filename.substring(0,filename.length()-1);
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} else {
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System.out.println(line);
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}
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} else {
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File myFile = new File(new File(sigPlace.OUTDIR,sigPlace.UPLOADSDIR),filename);
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// check if file exist, otherwise create the file before writing
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if (!myFile.exists()) {
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myFile.createNewFile();
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} else {
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myFile.delete();
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myFile.createNewFile();
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}
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stream = new FileOutputStream(myFile);
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char[] buffer = new char[1024];
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int count;
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while ((count = in.read(buffer))>0) {
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//stream.write(in.read(buffer));
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//stream.write(buffer.,0,count);
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String buf = new String(buffer);
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byte[] data = buf.getBytes("ISO-8859-1");
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stream.write(data,0,count);
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if (buf.contains(boundary)) {
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System.out.println("");
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System.out.println("<...>");
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System.out.println("");
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System.out.println(new String(data,StandardCharsets.UTF_8));
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break;
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}
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}
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stream.close();
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filename=null;
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System.out.println("Saving upload to "+sigPlace.UPLOADSDIR+" directory.");
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}
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}
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if (line.contains("Content-Type: multipart/form-data; boundary=")) {
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boundary="--"+line.substring("Content-Type: multipart/form-data; boundary=".length());
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}
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} else
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if (modifiedDate==null&&line.startsWith("If-Modified-Since: ")) {
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String modifiedSince=line.replace("If-Modified-Since: ","");
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modifiedDate = ZonedDateTime.parse(modifiedSince,DateTimeFormatter.RFC_1123_DATE_TIME);
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//System.out.println("Found a modified date of: "+modifiedDate);
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}
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}
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//This is valid.
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if (splitter[0].equals("GET")) { //This is a GET request.
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if (splitter[2].equals("HTTP/1.1")||splitter[2].equals("HTTP/2.0")) {
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String[] requestSplit = splitter[1].split(Pattern.quote("?"));
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String requestloc = requestSplit[0];
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HashMap<String,String> requestParams = new HashMap<>();
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if (requestSplit.length>1) {
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String[] params = requestSplit[1].split(Pattern.quote("&"));
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for (String s : params) {
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String key = s.substring(0,s.indexOf('='));
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String value = s.substring(s.indexOf('=')+1);
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requestParams.put(key,value);
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}
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System.out.println(" ==Params for this request are: "+requestParams);
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}
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if (requestloc.equals("/")) {
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//Send default directory.
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if (modifiedDate==null||modifiedDate.isBefore(GetLastModifiedDate(sigPlace.OUTDIR,"testfile.html"))) {
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System.out.println(GetLastModifiedDate(sigPlace.OUTDIR,"testfile.html")+"//"+modifiedDate);
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CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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} else {
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//System.out.println(" testfile.html is cached! No sending required.");
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CreateRequest(client,"304","Not Modified",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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}
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} else {
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String location = URLDecoder.decode(requestloc.replaceFirst("/",""),StandardCharsets.UTF_8);
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if (modifiedDate==null||modifiedDate.isBefore(GetLastModifiedDate(sigPlace.OUTDIR,location)))
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{
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Path file = null;
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if (location.equals("comment")) {
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file = Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article"));
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} else {
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file = Paths.get(sigPlace.OUTDIR,location);
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}
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CreateRequest(client,"200","OK",file);
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} else {
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//System.out.println(" "+location+" is cached! No sending required.");
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CreateRequest(client,"304","Not Modified",Paths.get(location));
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}
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}
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}
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} else
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if (splitter[0].equals("POST")) { //This is a POST request.
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if (boundary!=null) {
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CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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} else {
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CreateRequest(client,"400","Bad Request",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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}
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} else {
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CreateRequest(client,"501","Not Implemented",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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}
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} else {
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in.close();
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CreateRequest(client,"400","Bad Request",Paths.get(sigPlace.OUTDIR,"testfile.html"));
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}
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}
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} catch(SocketException|NullPointerException e) {
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e.printStackTrace();
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private ZonedDateTime GetLastModifiedDate(String first,String...more) throws IOException {
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Instant newTime = Files.getLastModifiedTime(Paths.get(first,more)).toInstant();
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newTime = newTime.truncatedTo(ChronoUnit.SECONDS);
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return newTime.atZone(ZoneId.of("GMT"));
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}
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private void CreateRawRequest(OutputStream stream, String statusCode, String statusMsg, String contentType, byte[] content) {
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CreateRawRequest(stream, statusCode, statusMsg, contentType, content,null);
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}
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private void CreateRawRequest(OutputStream stream, String statusCode, String statusMsg, String contentType, byte[] content, FileTime lastModified) {
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try {
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stream.write(("HTTP/1.1 "+statusCode+" "+statusMsg+"\r\n").getBytes());
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stream.write(("ContentType: "+contentType+"\r\n").getBytes());
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if (lastModified!=null) {
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ZonedDateTime date = lastModified.toInstant().truncatedTo(ChronoUnit.SECONDS).atZone(ZoneId.of("GMT"));
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stream.write(("Last-Modified: "+date.format(DateTimeFormatter.RFC_1123_DATE_TIME)+"\r\n").getBytes());
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}
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stream.write("\r\n".getBytes());
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stream.write(content);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private void CreateRequest(Socket client, String statusCode, String statusMsg, Path file) {
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long startTime = System.currentTimeMillis();
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try {
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OutputStream clientOutput = client.getOutputStream();
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if (statusCode.equals("200")) {
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if (Files.exists(file)) {
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if (Files.isDirectory(file)) {
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CreateRawRequest(clientOutput,statusCode,statusMsg,"text/html",Files.readAllBytes(Paths.get(file.toAbsolutePath().toString(),sigPlace.DIRECTORYLISTING_FILENAME)),Files.getLastModifiedTime(file));
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clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
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} else {
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CreateRawRequest(clientOutput,statusCode,statusMsg,Files.probeContentType(file),Files.readAllBytes(file),Files.getLastModifiedTime(file));
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String contentType = Files.probeContentType(file);
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if (contentType!=null&&contentType.equals("text/html")) {
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clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
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}
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System.out.println(contentType);
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}
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System.out.println("Sent "+file+" to client "+client+".");
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} else {
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CreateRawRequest(clientOutput,statusCode,statusMsg,"text/html","<!DOCTYPE html>\nWe're sorry, your webpage is in another castle!".getBytes());
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System.out.println("Sent [404] "+statusMsg+" to client "+client+" for "+file+".");
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}
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} else {
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CreateRawRequest(clientOutput,statusCode,statusMsg,"text/html","<!DOCTYPE html>\nWe're sorry, your webpage exploded!".getBytes());
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System.out.println("Sent ["+statusCode+"] "+statusMsg+" to client "+client+" for "+file+".");
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}
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clientOutput.write("\r\n\r\n".getBytes());
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clientOutput.flush();
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client.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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