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SigPlace/sigServer.java

572 lines
43 KiB

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.FileTime;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Pattern;
import readers.Reader;
public class sigServer {
ServerSocket socket;
/**
* Writes a span tag with the included class.
* **/
private static String SPAN(String className) {
return "<span class=\""+className+"\">";
}
private static boolean validNumericalConstantCharacters(String storedCodeBlock,int lengthOfConstant, int j) {
return storedCodeBlock.charAt(j)>='0'&&storedCodeBlock.charAt(j)<='9'||lengthOfConstant>0&&storedCodeBlock.charAt(j)=='.'||lengthOfConstant>0&&storedCodeBlock.charAt(j)>='A'&&lengthOfConstant>0&&storedCodeBlock.charAt(j)<='F'||lengthOfConstant>0&&storedCodeBlock.charAt(j)>='a'&&lengthOfConstant>0&&storedCodeBlock.charAt(j)<='f'||lengthOfConstant>0&&storedCodeBlock.charAt(j)=='x'||lengthOfConstant>0&&storedCodeBlock.charAt(j)=='X';
}
private static boolean isAlphanumeric(String storedCodeBlock,int j) {
return storedCodeBlock.charAt(j)>='0'&&storedCodeBlock.charAt(j)<='9'||storedCodeBlock.charAt(j)>='A'&&storedCodeBlock.charAt(j)<='Z'||storedCodeBlock.charAt(j)>='a'&&storedCodeBlock.charAt(j)<='z';
}
sigServer() {
try {
socket = new ServerSocket(sigPlace.PORT);
System.out.println("Listening on port "+sigPlace.PORT+".");
while (true) {
try (Socket client = socket.accept()) {
System.out.println("New client connection detected: "+client.toString());
InputStreamReader reader = new InputStreamReader(client.getInputStream(),"ISO-8859-1");
BufferedReader in = new BufferedReader(reader);
String requestLine,line;
ZonedDateTime modifiedDate = null;
String boundary=null;
boolean truncateUntilBoundary=false;
String filename=null;
OutputStream stream = null;
int expectedDataLength=0;
requestLine=in.readLine(); //Read the first line, this should be our request.
//System.out.println(requestLine);
if (requestLine!=null) {
String[] splitter = requestLine.split(Pattern.quote(" "));
boolean ISPOST = splitter[0].equals("POST");
boolean isApplication=false;
if (splitter.length==3) {
while (in.ready()) {
line=in.readLine();
//System.out.println(line);
if (ISPOST) {
if (isApplication) {
if (line.length()==0) { //Now expecting the body since the header is done.
for (int i=0;i<expectedDataLength;i++) {
System.out.print((char)in.read());
}
break;
}
} else //File transfer?
if (boundary!=null) {
if (!truncateUntilBoundary) {
System.out.println(line);
if (boundary.length()>0) {
if (line.equals(boundary)) {
truncateUntilBoundary=true;
System.out.println("Boundary found.");
}
}
} else {
if (line.contains("Content-Disposition: ")||line.contains("Content-Type: ")) {
if (line.contains("filename=")) {
filename=line.substring(line.indexOf("filename=")+"filename=".length()+1);
filename = filename.substring(0,filename.length()-1);
int dotPosition=0;
if (filename.contains(".")) {
for (int i=filename.length()-1;i>=0;i--) {
if (filename.charAt(i)=='.') {
dotPosition=i;
break;
}
}
}
filename="upload"+System.nanoTime()+filename.substring(dotPosition);
System.out.println("Filename: "+filename);
} else {
System.out.println(line);
}
} else {
System.out.println(line);
File myFile = null;
if (filename.contains(".png")) {
myFile = new File(sigPlace.ARCADEDIR,filename);
} else {
myFile = new File(new File(sigPlace.OUTDIR,sigPlace.UPLOADSDIR),filename);
}
// check if file exist, otherwise create the file before writing
myFile.mkdirs();
System.out.println("Dirs added.");
if (!myFile.exists()) {
myFile.createNewFile();
} else {
myFile.delete();
myFile.createNewFile();
}
stream = new FileOutputStream(myFile);
char[] buffer = new char[1024];
int count;
boolean wroteData=false;
while ((count = in.read(buffer))>0) {
//stream.write(in.read(buffer));
//stream.write(buffer.,0,count);
String buf = new String(buffer);
byte[] data = buf.getBytes("ISO-8859-1");
stream.write(data,0,count);
wroteData=true;
if (buf.contains(boundary)) {
System.out.println("");
System.out.println("<...>");
System.out.println("");
System.out.println(new String(data,StandardCharsets.UTF_8));
break;
}
}
stream.close();
if (!wroteData) {
System.out.println("Upload failed!");
CreateRequest(client,"400","Bad Request",Paths.get(sigPlace.OUTDIR,"testfile.html"));
} else {
System.out.println("Saving upload to "+myFile);
if (filename.contains(".png")) {
CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
ArcadeReader.submitToDatabase(Paths.get(sigPlace.ARCADEDIR,filename));
System.out.println("Submitted to the database!");
}
}
filename=null;
}
}
} else {
if (line.contains("Content-Length: ")) {
expectedDataLength=Integer.parseInt(line.substring("Content-Length: ".length()));
System.out.println("Expecting a length of "+expectedDataLength);
}
if (line.contains("Content-Type:")) {
if (line.contains("Content-Type: multipart/form-data; boundary=")) {
boundary="--"+line.substring("Content-Type: multipart/form-data; boundary=".length());
} else
if (line.contains("application/json")){
isApplication=true;
System.out.println("Application request detected.");
//Keep going for now.
} else {
break; //Incompatible type.
}
}
}
} else
if (modifiedDate==null&&line.startsWith("If-Modified-Since: ")) {
String modifiedSince=line.replace("If-Modified-Since: ","");
modifiedDate = ZonedDateTime.parse(modifiedSince,DateTimeFormatter.RFC_1123_DATE_TIME);
//System.out.println("Found a modified date of: "+modifiedDate);
}
}
//This is valid.
if (splitter[0].equals("GET")) { //This is a GET request.
if (splitter[2].equals("HTTP/1.1")||splitter[2].equals("HTTP/2.0")) {
String[] requestSplit = splitter[1].split(Pattern.quote("?"));
String requestloc = requestSplit[0];
HashMap<String,String> requestParams = new HashMap<>();
if (requestSplit.length>1) {
String[] params = requestSplit[1].split(Pattern.quote("&"));
for (String s : params) {
String key = s.substring(0,s.indexOf('='));
String value = s.substring(s.indexOf('=')+1);
requestParams.put(key,value);
}
System.out.println(" ==Params for this request are: "+requestParams);
}
if (requestloc.equals("/")) {
//Send default directory.
if (modifiedDate==null||modifiedDate.isBefore(GetLastModifiedDate(sigPlace.OUTDIR,"testfile.html"))) {
System.out.println(GetLastModifiedDate(sigPlace.OUTDIR,"testfile.html")+"//"+modifiedDate);
CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
} else {
//System.out.println(" testfile.html is cached! No sending required.");
CreateRequest(client,"304","Not Modified",Paths.get(sigPlace.OUTDIR,"testfile.html"));
}
} else {
String location = URLDecoder.decode(requestloc.replaceFirst("/",""),StandardCharsets.UTF_8);
Path file = null;
if (location.equals("COMMENTS")) {
file = Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article"));
} else {
file = Paths.get(sigPlace.OUTDIR,location);
}
if (location.equals("COMMENTS")&&requestParams.containsKey("message")&&requestParams.containsKey("name")&&requestParams.containsKey("color")) {
//System.out.println(requestParams);
String finalMsg = requestParams.get("message").replaceAll(Pattern.quote("%3C"),"<");
if (finalMsg.length()>0&&URLDecoder.decode(requestParams.get("message"),StandardCharsets.UTF_8).replaceAll(Pattern.quote(" "),"").length()<=1000&&
(requestParams.get("color").equals("BLUE")||
requestParams.get("color").equals("RED")||
requestParams.get("color").equals("GREEN")||
requestParams.get("color").equals("YELLOW")||
requestParams.get("color").equals("MAGENTA")||
requestParams.get("color").equals("CYAN")||
requestParams.get("color").equals("WHITE"))) {
boolean boldBlock=false;
boolean italicBlock=false;
boolean underlineBlock=false;
boolean codeBlock=false;
boolean linkBlock=false;
StringBuilder storedLink=new StringBuilder();
StringBuilder codeBlockMsg = new StringBuilder();
StringBuilder buildMsg = new StringBuilder();
for (int i=0;i<finalMsg.length();i++) {
if (i<finalMsg.length()-1&&finalMsg.charAt(i)=='~'&&finalMsg.charAt(i+1)=='~') {
if (codeBlock) {
codeBlockMsg.append("~~");
String storedCodeBlock="";
String s = URLDecoder.decode(codeBlockMsg.toString().replaceAll(Pattern.quote("%0A"),"\\\\\\\\NEWLINE\\\\\\\\"),StandardCharsets.UTF_8.toString());
boolean keyword=false;
boolean inString=false;
boolean inComment=false;
boolean inMultiLineComment=false;
char stringChar=' ';
boolean canBeNumericalConstant=false;
int lengthOfConstant=0;
storedCodeBlock+=s.substring(0,s.indexOf("~~"));
storedCodeBlock=storedCodeBlock.replaceAll(Pattern.quote("<"),"\2");
int startPos=0;
String endText=s.substring(s.indexOf("~~")+"~~".length(),s.length());
s="";
for (int j=0;j<storedCodeBlock.length()-1;j++) {
if (storedCodeBlock.charAt(j)=='\n'&&inString) {
inString=false;
s+="</span>";
} else
if (storedCodeBlock.charAt(j)=='\n'&&inComment) {
inComment=false;
s+=SPAN("comment")+storedCodeBlock.substring(startPos,j)+"</span>";
startPos=j+1;
}
if (!inComment&&!inMultiLineComment&&(j>0&&storedCodeBlock.charAt(j-1)!='\\'&&(!inString&&(storedCodeBlock.charAt(j)=='"'||storedCodeBlock.charAt(j)=='\'')||inString&&(storedCodeBlock.charAt(j)==stringChar)))) {
inString=!inString;
if (inString) {
stringChar=storedCodeBlock.charAt(j);
s+=SPAN("string")+stringChar;
} else {
s+=stringChar;
s+="</span>";
startPos=j+1;
}
} else
if (!inString) {
if (canBeNumericalConstant&&validNumericalConstantCharacters(storedCodeBlock,lengthOfConstant, j)) {
lengthOfConstant++;
//System.out.println("Length of Constant now "+lengthOfConstant);
}
if (j>0&&storedCodeBlock.charAt(j)=='/'&&storedCodeBlock.charAt(j+1)=='*'||inMultiLineComment) {
if (!inMultiLineComment) {
inMultiLineComment=true;
} else {
if (storedCodeBlock.charAt(j-1)=='*'&&storedCodeBlock.charAt(j)=='/') {
inMultiLineComment=false;
s+=SPAN("comment")+storedCodeBlock.substring(startPos,j)+storedCodeBlock.charAt(j)+"</span>";
startPos=j+1;
}
}
//Stops further execution since we're in a comment.
} else
if (j>0&&storedCodeBlock.charAt(j)=='/'&&storedCodeBlock.charAt(j+1)=='/'||inComment) {
if (!inComment) {
inComment=true;
}
//Stops further execution since we're in a comment.
} else
if (canBeNumericalConstant&&lengthOfConstant>0&&!(validNumericalConstantCharacters(storedCodeBlock,lengthOfConstant, j))) {
s+=SPAN("number")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
//System.out.println("Setting "+storedCodeBlock.substring(startPos,j)+storedCodeBlock.charAt(j));
lengthOfConstant=0;
canBeNumericalConstant=false;
startPos=j+1;
} else
if (!canBeNumericalConstant&&storedCodeBlock.charAt(j)=='.') {
//Previous section was a member.
s+=SPAN("class")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
startPos=j+1;
} else
if (j>3&&storedCodeBlock.substring(j-3,j+1).equals("true")&&!isAlphanumeric(storedCodeBlock,j-4)&&!isAlphanumeric(storedCodeBlock,j+1)) {
s+=SPAN("number")+storedCodeBlock.substring(startPos,j)+storedCodeBlock.charAt(j)+"</span>";
startPos=j+1;
} else
if (j>4&&storedCodeBlock.substring(j-4,j+1).equals("false")&&!isAlphanumeric(storedCodeBlock,j-5)&&!isAlphanumeric(storedCodeBlock,j+1)) {
s+=SPAN("number")+storedCodeBlock.substring(startPos,j)+storedCodeBlock.charAt(j)+"</span>";
startPos=j+1;
} else
if (storedCodeBlock.charAt(j)=='(') {
s+=SPAN("function")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
startPos=j+1;
} else
if (j>0&&isAlphanumeric(storedCodeBlock,j-1) && storedCodeBlock.charAt(j)==' '&&storedCodeBlock.charAt(j-1)!=' ') {
//Previous section was a keyword.
keyword=true;
s+=SPAN("keyword")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
startPos=j+1;
} else
if (j>0&&isAlphanumeric(storedCodeBlock,j-1) && (storedCodeBlock.charAt(j)==';'||storedCodeBlock.charAt(j)==':')) {
//Previous section was a keyword.
//keyword=true;
s+=SPAN("keyword")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
startPos=j+1;
} else
if (keyword&&!(storedCodeBlock.charAt(j)=='_'||storedCodeBlock.charAt(j)>='0'&&storedCodeBlock.charAt(j)<='9'||storedCodeBlock.charAt(j)>='A'&&storedCodeBlock.charAt(j)<='Z'||storedCodeBlock.charAt(j)>='a'&&storedCodeBlock.charAt(j)<='z'||storedCodeBlock.charAt(j)==' ')) {
keyword=false;
s+=SPAN("variable")+storedCodeBlock.substring(startPos,j)+"</span>"+storedCodeBlock.charAt(j);
startPos=j+1;
} else
if (!isAlphanumeric(storedCodeBlock,j)){
if (startPos<j) {
s+=storedCodeBlock.substring(startPos,j)+storedCodeBlock.charAt(j);
} else {
s+=storedCodeBlock.charAt(j);
}
startPos=j+1;
}
} else {
s+=storedCodeBlock.charAt(j);
startPos=j+1;
}
if (canBeNumericalConstant&&lengthOfConstant==0&&!(storedCodeBlock.charAt(j)>='0'&&storedCodeBlock.charAt(j)<='9')) {
canBeNumericalConstant=false;
}
if (!canBeNumericalConstant&&!isAlphanumeric(storedCodeBlock,j)) {
canBeNumericalConstant=true;
lengthOfConstant=0;
//System.out.println("Found "+storedCodeBlock.charAt(j)+", can be numeric...");
}
}
for (int j=0;j<s.length();j++) {
if (s.charAt(j)=='\2') {
s=s.substring(0,j)+"&lt;"+s.substring(j+1,s.length());
}
}
s="<pre>"+s+"</pre>";
s+=endText;
buildMsg.append(s);
} else {
codeBlockMsg=codeBlockMsg.delete(0, codeBlockMsg.length());
}
i+=1;
codeBlock=!codeBlock;
continue;
} else
if (codeBlock) {
codeBlockMsg.append(finalMsg.charAt(i));continue;
}
if (foundSub("%5E%5E",finalMsg,i)) {
if (boldBlock) {
buildMsg.append("</b>");
} else {
buildMsg.append("<b>");
}
boldBlock=!boldBlock;
i+=5;
continue;
}
if (i<finalMsg.length()-1&&finalMsg.charAt(i)=='*'&&finalMsg.charAt(i+1)=='*') {
if (italicBlock) {
buildMsg.append("</i>");
} else {
buildMsg.append("<i>");
}
italicBlock=!italicBlock;
i+=1;
continue;
}
if (i<finalMsg.length()-1&&finalMsg.charAt(i)=='_'&&finalMsg.charAt(i +1)=='_') {
if (underlineBlock) {
buildMsg.append("</u>");
} else {
buildMsg.append("<u>");
}
underlineBlock=!underlineBlock;
i+=1;
continue;
}
if (foundSub("%5B%5B",finalMsg,i)||foundSub("%5D%5D",finalMsg,i)) {
if (linkBlock) {
buildMsg.append("\">").append(storedLink).append("</a>");
} else {
storedLink.delete(0,storedLink.length());
buildMsg.append("<a href=\"");
}
linkBlock=!linkBlock;
i+=5;
continue;
}
if (linkBlock) {
storedLink.append(finalMsg.charAt(i));
}
if (i<finalMsg.length()-1&&finalMsg.charAt(i)=='_'&&finalMsg.charAt(i+1)=='_') {
if (underlineBlock) {
buildMsg.append("</u>");
} else {
buildMsg.append("<u>");
}
underlineBlock=!underlineBlock;
i+=1;
continue;
}
if (finalMsg.charAt(i)=='<') {
buildMsg.append("&lt;");
continue;
}
buildMsg.append(finalMsg.charAt(i));
}
if (Files.exists(Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article")))) {
List<String> data = Files.readAllLines(Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article")));
data.set(0,Integer.toString(Integer.parseInt(data.get(0))+1));
data.add(buildMsg.toString()+"\n"+requestParams.get("name")+ZonedDateTime.now()+";"+requestParams.get("color"));
Files.write(Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article")), data, StandardOpenOption.TRUNCATE_EXISTING,StandardOpenOption.WRITE);
} else {
List<String> data = new ArrayList<String>();
data.add("1");
data.add(buildMsg.toString()+"\n"+requestParams.get("name")+ZonedDateTime.now()+";"+requestParams.get("color"));
Files.write(Paths.get(sigPlace.COMMENTSDIR,requestParams.get("article")), data, StandardOpenOption.TRUNCATE_EXISTING,StandardOpenOption.WRITE,StandardOpenOption.CREATE_NEW);
}
CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
} else {
CreateRequest(client,"304","Not Modified",Paths.get(sigPlace.OUTDIR,"testfile.html"));
}
} else {
if (modifiedDate==null||Files.exists(file)&&modifiedDate.isBefore(GetLastModifiedDate(file)))
{
CreateRequest(client,"200","OK",file);
} else {
//System.out.println(" "+location+" is cached! No sending required.");
CreateRequest(client,"304","Not Modified",file);
}
}
}
}
} else
if (splitter[0].equals("POST")) { //This is a POST request.
if (boundary!=null) {
CreateRequest(client,"200","OK",Paths.get(sigPlace.OUTDIR,"testfile.html"));
} else {
CreateRequest(client,"400","Bad Request",Paths.get(sigPlace.OUTDIR,"testfile.html"));
}
} else {
CreateRequest(client,"501","Not Implemented",Paths.get(sigPlace.OUTDIR,"testfile.html"));
}
} else {
in.close();
CreateRequest(client,"400","Bad Request",Paths.get(sigPlace.OUTDIR,"testfile.html"));
}
}
} catch(SocketException|NullPointerException e) {
e.printStackTrace();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private boolean foundSub(String string, String finalMsg, int i) {
if (i+string.length()<=finalMsg.length()) {
for (int j=0;j<string.length();j++) {
if (string.charAt(j)!=finalMsg.charAt(i+j)) {
return false;
}
}
return true;
}
return false;
}
private ZonedDateTime GetLastModifiedDate(Path p) throws IOException {
Instant newTime = Files.getLastModifiedTime(p).toInstant();
newTime = newTime.truncatedTo(ChronoUnit.SECONDS);
return newTime.atZone(ZoneId.of("GMT"));
}
private ZonedDateTime GetLastModifiedDate(String first,String...more) throws IOException {
return GetLastModifiedDate(Paths.get(first,more));
}
private void CreateRawRequest(OutputStream stream, String statusCode, String statusMsg, String contentType, byte[] content) {
CreateRawRequest(stream, statusCode, statusMsg, contentType, content,null);
}
private void CreateRawRequest(OutputStream stream, String statusCode, String statusMsg, String contentType, byte[] content, FileTime lastModified) {
try {
stream.write(("HTTP/1.1 "+statusCode+" "+statusMsg+"\r\n").getBytes());
stream.write(("ContentType: "+contentType+"\r\n").getBytes());
if (lastModified!=null) {
ZonedDateTime date = lastModified.toInstant().truncatedTo(ChronoUnit.SECONDS).atZone(ZoneId.of("GMT"));
stream.write(("Last-Modified: "+date.format(DateTimeFormatter.RFC_1123_DATE_TIME)+"\r\n").getBytes());
}
stream.write("\r\n".getBytes());
stream.write(content);
} catch (IOException e) {
e.printStackTrace();
}
}
private void CreateRequest(Socket client, String statusCode, String statusMsg, Path file) {
long startTime = System.currentTimeMillis();
try {
OutputStream clientOutput = client.getOutputStream();
if (statusCode.equals("200")) {
if (Files.exists(file)) {
if (Files.isDirectory(file)) {
CreateRawRequest(clientOutput,statusCode,statusMsg,"text/html",Files.readAllBytes(Paths.get(file.toAbsolutePath().toString(),sigPlace.DIRECTORYLISTING_FILENAME)),Files.getLastModifiedTime(file));
clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
} else {
CreateRawRequest(clientOutput,statusCode,statusMsg,Files.probeContentType(file),Files.readAllBytes(file),Files.getLastModifiedTime(file));
String contentType = Files.probeContentType(file);
if (contentType!=null&&contentType.equals("text/html")) {
clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
}
//System.out.println(contentType);
}
System.out.println("Sent "+file+" to client "+client+".");
} else {
System.out.println("Did not find "+file+". Sending an error instead.");
file=Paths.get(sigPlace.OUTDIR,"error.html");
CreateRawRequest(clientOutput,"404",statusMsg,Files.probeContentType(file),Files.readAllBytes(file),Files.getLastModifiedTime(file));
String contentType = Files.probeContentType(file);
if (contentType!=null&&contentType.equals("text/html")) {
clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
}
}
} else {
CreateRawRequest(clientOutput,statusCode,statusMsg,Files.probeContentType(file),Files.readAllBytes(file),Files.getLastModifiedTime(file));
String contentType = Files.probeContentType(file);
if (contentType!=null&&contentType.equals("text/html")) {
clientOutput.write(("<div class=\"generateTime\">Webpage generated in "+(System.currentTimeMillis()-startTime)+"ms</div>\r\n").getBytes());
}
System.out.println("Sent "+file+" with status ["+statusCode+"] "+statusMsg);
}
clientOutput.write("\r\n\r\n".getBytes());
clientOutput.flush();
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}