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   1 /**********************************************************************
   2  * Copyright (c) 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *    IBM - Initial API and implementation
  10  **********************************************************************/
  11 package net.sourceforge.phpdt.monitor.core.internal.http;
  12
  13 import java.io.*;
  14
  15 import net.sourceforge.phpdt.monitor.core.IRequest;
  16 import net.sourceforge.phpdt.monitor.core.internal.Connection;
  17 import net.sourceforge.phpdt.monitor.core.internal.Trace;
  18
  19 /**
  20  * Monitor server I/O thread.
  21  */
  22 public class HTTPThread extends Thread {
  23         private static final int BUFFER = 2048;
  24         private static final byte CR = (byte) '\r';
  25         private static final byte LF = (byte) '\n';
  26         protected static int threadCount = 0;
  27
  28         private byte[] readBuffer = new byte[BUFFER];
  29
  30         // buffer and index
  31         protected byte[] buffer = new byte[0];
  32         protected int bufferIndex = 0;
  33
  34         protected InputStream in;
  35         protected OutputStream out;
  36         protected HTTPConnection conn;
  37         protected boolean isRequest;
  38         protected Connection conn2;
  39
  40         protected HTTPThread request;
  41         protected boolean isWaiting;
  42
  43         // user to translate the Host: header
  44         protected String host;
  45         protected int port;
  46
  47         protected int contentLength = -1;
  48         protected byte transferEncoding = -1;
  49         protected String responseType = null;
  50         protected boolean keepAlive = false;
  51
  52         protected static final String[] ENCODING_STRING = new String[] {
  53                 "chunked", "identity", "gzip", "compressed", "deflate"};
  54
  55         protected static final byte ENCODING_CHUNKED = 0;
  56         protected static final byte ENCODING_IDENTITY = 1;
  57         protected static final byte ENCODING_GZIP = 2;
  58         protected static final byte ENCODING_COMPRESSED = 3;
  59         protected static final byte ENCODING_DEFLATE = 4;
  60
  61 /* change:
  62 Referer: http://localhost:8081/index.html
  63 Host: localhost:8081
  64 */
  65 /* The Connection header has the following grammar:
  66
  67            Connection = "Connection" ":" 1#(connection-token)
  68            connection-token  = token
  69
  70    HTTP/1.1 proxies MUST parse the Connection header field before a
  71    message is forwarded and, for each connection-token in this field,
  72    remove any header field(s) from the message with the same name as the
  73    connection-token. */
  74
  75         /**
  76          * MonitorThread constructor comment.
  77          */
  78         public HTTPThread(Connection conn2, InputStream in, OutputStream out, HTTPConnection conn, boolean isRequest, String host, int port) {
  79                 super();
  80                 this.conn2 = conn2;
  81                 this.in = in;
  82                 this.out = out;
  83                 this.conn = conn;
  84                 this.isRequest = isRequest;
  85                 this.host = host;
  86                 this.port = port;
  87
  88                 setName("HTTP (" + host + ":" + port + ") " + (isRequest ? "REQUEST" : "RESPONSE") + " " + (threadCount++));
  89                 setPriority(Thread.NORM_PRIORITY + 1);
  90                 setDaemon(true);
  91
  92                 Trace.trace(Trace.PARSING, "Started: " + this);
  93         }
  94
  95         /**
  96          * MonitorThread constructor comment.
  97          */
  98         public HTTPThread(Connection conn2, InputStream in, OutputStream out, HTTPConnection conn, boolean isRequest, String host, int port, HTTPThread request) {
  99                 this(conn2, in, out, conn, isRequest, host, port);
 100
 101                 this.request = request;
 102         }
 103
 104         /**
 105          * Add a line feed to the end of the byte array.
 106          * @return byte[]
 107          * @param b byte[]
 108          */
 109         protected static byte[] convert(byte[] b) {
 110                 if (b == null || b.length == 0)
 111                         return b;
 112
 113                 int size = b.length;
 114                 byte[] x = new byte[size + 2];
 115                 System.arraycopy(b, 0, x, 0, size);
 116                 x[size] = (byte) '\r';     // CR
 117                 x[size + 1] = (byte) '\n'; // LF
 118                 return x;
 119         }
 120
 121         /**
 122          * Read more data into the buffer.
 123          *
 124          * @return byte[]
 125          */
 126         protected void fillBuffer() throws IOException {
 127                 int n = in.read(readBuffer);
 128
 129                 if (n <= 0)
 130                         throw new IOException("End of input");
 131
 132                 // add to full buffer
 133                 int len = buffer.length - bufferIndex;
 134                 if (len < 0)
 135                         len = 0;
 136                 byte[] x = new byte[n + len];
 137                 System.arraycopy(buffer, bufferIndex, x, 0, len);
 138                 System.arraycopy(readBuffer, 0, x, len, n);
 139                 bufferIndex = 0;
 140                 buffer = x;
 141         }
 142
 143         /**
 144          * Returns the first location of a CRLF.
 145          *
 146          * @return int
 147          */
 148         protected int getFirstCRLF() {
 149                 int size = buffer.length;
 150                 int i = bufferIndex + 1;
 151                 while (i < size) {
 152                         if (buffer[i - 1] == CR && buffer[i] == LF)
 153                                 return i;
 154                         i++;
 155                 }
 156                 return -1;
 157         }
 158
 159         /**
 160          * Output the given bytes.
 161          * @param b byte[]
 162          */
 163         protected void outputBytes(byte[] b, boolean isNew) throws IOException {
 164                 out.write(b);
 165                 if (isRequest)
 166                         conn.addRequest(b, isNew);
 167                 else
 168                         conn.addResponse(b, isNew);
 169         }
 170
 171         /**
 172          * Parse the HTTP body.
 173          */
 174         public void parseBody() throws IOException {
 175                 Trace.trace(Trace.PARSING, "Parsing body for: " + this);
 176
 177                 if (isRequest) {
 178                         if (contentLength != -1) {
 179                                 byte[] b = readBytes(contentLength);
 180                                 out.write(b);
 181                                 conn.addRequest(b, false);
 182                                 setHTTPBody(b);
 183                         } else if (transferEncoding != -1 && transferEncoding != ENCODING_IDENTITY) {
 184                                 parseChunk();
 185                         }
 186
 187                         Trace.trace(Trace.PARSING, "Done parsing request body for: " + this);
 188                         return;
 189                 }
 190
 191                 // just return body for HTTP 1.0 responses
 192                 if (!isRequest && !keepAlive && contentLength == -1 && transferEncoding == -1) {
 193                         Trace.trace(Trace.PARSING, "Assuming HTTP 1.0 for: " + this);
 194                         int n = buffer.length - bufferIndex;
 195                         byte[] b = readBytes(n);
 196                         byte[] body = new byte[0];
 197                         while (n >= 0) {
 198                                 Trace.trace(Trace.PARSING, "Bytes read: " + n + " " + this);
 199                                 if (b != null && n > 0) {
 200                                         byte[] x = null;
 201                                         if (n == b.length)
 202                                                 x = b;
 203                                         else {
 204                                                 x = new byte[n];
 205                                                 System.arraycopy(b, 0, x, 0, n);
 206                                         }
 207                                         outputBytes(x, false);
 208
 209                                         // copy to HTTP body
 210                                         byte[] temp = new byte[body.length + x.length];
 211                                         System.arraycopy(body, 0, temp, 0, body.length);
 212                                         System.arraycopy(x, 0, temp, body.length, x.length);
 213                                         body = temp;
 214                                 }
 215                                 if (b.length < BUFFER)
 216                                         b = new byte[BUFFER];
 217                                 n = in.read(b);
 218                                 Thread.yield();
 219                         }
 220                         out.flush();
 221                         setHTTPBody(body);
 222                         return;
 223                 }
 224
 225                 // spec 4.4.1
 226                 if (responseType != null &&     (responseType.startsWith("1") || "204".equals(responseType) || "304".equals(responseType))) {
 227                         setHTTPBody(new byte[0]);
 228                         return;
 229                 }
 230
 231                 // spec 4.4.2
 232                 if (transferEncoding != -1 && transferEncoding != ENCODING_IDENTITY) {
 233                         parseChunk();
 234                         return;
 235                 }
 236
 237                 // spec 4.4.3
 238                 if (contentLength != -1) {
 239                         byte[] b = readBytes(contentLength);
 240                         out.write(b);
 241                         if (isRequest)
 242                                 conn.addRequest(b, false);
 243                         else
 244                                 conn.addResponse(b, false);
 245                         setHTTPBody(b);
 246                         return;
 247                 }
 248
 249                 // spec 4.4.4 (?)
 250
 251                 Trace.trace(Trace.PARSING, "Unknown body for: " + this);
 252         }
 253
 254         /**
 255          * Parse an HTTP chunk.
 256          */
 257         public void parseChunk() throws IOException {
 258                 Trace.trace(Trace.PARSING, "Parsing chunk for: " + this);
 259                 boolean done = false;
 260                 byte[] body = new byte[0];
 261
 262                 while (!done) {
 263                         // read chunk size
 264                         byte[] b = readLine();
 265
 266                         String s = new String(b);
 267                         int index = s.indexOf(" ");
 268                         int length = -1;
 269                         try {
 270                                 if (index > 0)
 271                                         s = s.substring(0, index);
 272                                 length = Integer.parseInt(s.trim(), 16);
 273                         } catch (Exception e) {
 274                                 Trace.trace(Trace.PARSING, "Error chunk for: " + this, e);
 275                         }
 276
 277                         // output bytes
 278                         outputBytes(b, false);
 279
 280                         if (length <= 0)
 281                                 done = true;
 282                         else {
 283                                 // read and output chunk data plus CRLF
 284                                 b = readBytes(length + 2);
 285                                 outputBytes(b, false);
 286
 287                                 // copy to HTTP body
 288                                 byte[] temp = new byte[body.length + b.length - 2];
 289                                 System.arraycopy(body, 0, temp, 0, body.length);
 290                                 System.arraycopy(b, 0, temp, body.length, b.length - 2);
 291                                 body = temp;
 292                         }
 293                 }
 294
 295                 // read trailer
 296                 byte[] b = readLine();
 297                 while (b.length > 2) {
 298                         outputBytes(b, false);
 299                         b = readLine();
 300                 }
 301
 302                 outputBytes(b, false);
 303                 setHTTPBody(body);
 304         }
 305
 306         /**
 307          * Parse an HTTP header.
 308          */
 309         public void parseHeader() throws IOException {
 310                 Trace.trace(Trace.PARSING, "Parsing header for: " + this);
 311
 312                 // read until first blank line
 313                 boolean isFirstLine = true;
 314                 boolean isNew = true;
 315
 316                 byte[] b = readLine();
 317                 while (b.length > 5) {
 318                         Trace.trace(Trace.PARSING, "Parsing header line: '" + new String(b) + "'");
 319
 320                         if (isFirstLine) {
 321                                 String s = new String(b);
 322                                 if (isRequest) {
 323                                         setLabel(s);
 324                                         isNew = false;
 325                                 }
 326
 327                                 if (!isRequest) {
 328                                         int index1 = s.indexOf(' ');
 329                                         int index2 = s.indexOf(' ', index1 + 1);
 330
 331                                         try {
 332                                                 responseType = s.substring(index1 + 1, index2).trim();
 333                                                 Trace.trace(Trace.PARSING, "Response Type: " + this + " " + responseType);
 334                                         } catch (Exception e) {
 335                                                 Trace.trace(Trace.PARSING, "Error parsing response type for: " + this, e);
 336                                         }
 337                                         if (responseType != null && responseType.equals("100")) {
 338                                                 outputBytes(b, isNew);
 339                                                 isNew = false;
 340
 341                                                 b = readLine();
 342                                                 outputBytes(b, false);
 343
 344                                                 b = readLine();
 345
 346                                                 index1 = s.indexOf(' ');
 347                                                 index2 = s.indexOf(' ', index1 + 1);
 348
 349                                                 try {
 350                                                         responseType = s.substring(index1 + 1, index2).trim();
 351                                                         Trace.trace(Trace.PARSING, "Response Type: " + this + " " + responseType);
 352                                                 } catch (Exception e) {
 353                                                         Trace.trace(Trace.PARSING, "Error parsing response type for: " + this, e);
 354                                                 }
 355                                         }
 356                                 }
 357                                 isFirstLine = false;
 358                         }
 359
 360                         // translate
 361                         b = translateHeaderLine(b);
 362
 363                         outputBytes(b, isNew);
 364                         isNew = false;
 365
 366                         b = readLine();
 367                 }
 368
 369                 Trace.trace(Trace.PARSING, "Parsing final header line: '" + new String(b) + "'");
 370
 371                 outputBytes(b, false);
 372
 373                 IRequest rr = conn.getRequestResponse(isRequest);
 374                 Trace.trace(Trace.PARSING, "Setting header length: " + rr.getRequest(IRequest.ALL).length);
 375
 376                 setHTTPHeader(rr);
 377         }
 378
 379         /**
 380          * Read bytes from the stream.
 381          * @return byte[]
 382          */
 383         protected byte[] readBytes(int n) throws IOException {
 384                 Trace.trace(Trace.PARSING, "readBytes() " + n + " for: " + this);
 385                 while (buffer.length - bufferIndex < n)
 386                         fillBuffer();
 387
 388                 return removeFromBuffer(bufferIndex + n);
 389         }
 390
 391         /**
 392          * Read and return the next full line.
 393          *
 394          * @return byte[]
 395          */
 396         protected byte[] readLine() throws IOException {
 397                 Trace.trace(Trace.PARSING, "readLine() for: " + this);
 398
 399                 int n = getFirstCRLF();
 400                 while (n < 0) {
 401                         fillBuffer();
 402                         n = getFirstCRLF();
 403                 }
 404                 return removeFromBuffer(n + 1);
 405         }
 406
 407         /**
 408          * Remove data from the buffer up to the absolute index n.
 409          * Return the data from between bufferIndex and n.
 410          *
 411          * @return byte[]
 412          * @param index int
 413          */
 414         protected byte[] removeFromBuffer(int n) {
 415                 // copy line out of buffer
 416                 byte[] b = new byte[n - bufferIndex];
 417                 System.arraycopy(buffer, bufferIndex, b, 0, n - bufferIndex);
 418
 419                 if (buffer.length > BUFFER * 2 || bufferIndex > BUFFER) {
 420                         // remove line from buffer
 421                         int size = buffer.length;
 422                         byte[] x = new byte[size - n];
 423                         System.arraycopy(buffer, n, x, 0, size - n);
 424                         buffer = x;
 425                         bufferIndex = 0;
 426                 } else
 427                         bufferIndex = n;
 428
 429                 return b;
 430         }
 431
 432         /**
 433          * Listen for input, save it, and pass to the output stream.
 434          * Philosophy: Read a single line separately and translate.
 435          * When blank line is reached, just pass all other data through.
 436          */
 437         public void run() {
 438                 try {
 439                         try {
 440                                 while (true) {
 441                                         contentLength = -1;
 442                                         transferEncoding = -1;
 443                                         keepAlive = false;
 444
 445                                         parseHeader();
 446                                         parseBody();
 447
 448                                         if (isRequest && keepAlive)
 449                                                 waitForResponse();
 450
 451                                         IRequest r = conn.getRequestResponse(true);
 452                                         r.fireChangedEvent();
 453
 454                                         Trace.trace(Trace.PARSING, "Done HTTP request for " + this + " " + keepAlive);
 455                                         if (!isRequest && !keepAlive) {
 456                                                 conn2.close();
 457                                                 break;
 458                                         }
 459
 460                                         if (!isRequest)
 461                                                 notifyRequest();
 462
 463                                         Thread.yield();
 464                                 }
 465                         } catch (IOException e) {
 466                                 // reached end of input
 467                                 Trace.trace(Trace.PARSING, "End of buffer for: " + this + " " + e.getMessage());
 468                         }
 469
 470                         // send rest of buffer
 471                         out.write(buffer, bufferIndex, buffer.length - bufferIndex);
 472                         out.flush();
 473                 } catch (IOException e) {
 474                         Trace.trace(Trace.PARSING, "Error in: " + this, e);
 475                 }
 476                 Trace.trace(Trace.PARSING, "Closing thread " + this);
 477         }
 478
 479         /**
 480          * Sets the title of the call.
 481          *
 482          * @param s java.lang.String
 483          */
 484         protected void setLabel(String s) {
 485                 try {
 486                         int index1 = s.indexOf(' ');
 487                         if (index1 < 0 || index1 > 15)
 488                                 return;
 489                         int index2 = s.indexOf(' ', index1 + 1);
 490                         if (index2 < 0)
 491                                 return;
 492
 493                         conn.setLabel(s.substring(index1 + 1, index2), true);
 494                 } catch (Exception e) { }
 495         }
 496
 497         /**
 498          * Translate the header line.
 499          *
 500          * @return byte[]
 501          * @param b byte[]
 502          */
 503         protected byte[] translateHeaderLine(byte[] b) {
 504                 String s = new String(b);
 505
 506                 if (isRequest && s.startsWith("Host: ")) {
 507                         String t = "Host: " + host;
 508                         if (port != 80)
 509                                 t += ":" + port;
 510                         return convert(t.getBytes());
 511                 } else if (s.startsWith("Content-Length: ")) {
 512                         try {
 513                                 contentLength = Integer.parseInt(s.substring(16).trim());
 514                                 Trace.trace(Trace.PARSING, "Content length: " + this + " " + contentLength);
 515                         } catch (Exception e) {
 516                                 Trace.trace(Trace.PARSING, "Content length error", e);
 517                         }
 518                 } else if (s.startsWith("Connection: ")) {
 519                         try {
 520                                 String t = s.substring(11).trim();
 521                                 if (t.equalsIgnoreCase("Keep-Alive"))
 522                                         keepAlive = true;
 523                                 Trace.trace(Trace.PARSING, "Keep alive: " + keepAlive);
 524                         } catch (Exception e) {
 525                                 Trace.trace(Trace.PARSING, "Error getting Connection: from header", e);
 526                         }
 527                 } else if (s.startsWith("Transfer-Encoding: ")) {
 528                         String t = s.substring(19).trim();
 529                         int size = ENCODING_STRING.length;
 530                         for (int i = 0; i < size; i++) {
 531                                 if (ENCODING_STRING[i].equalsIgnoreCase(t)) {
 532                                         transferEncoding = (byte) i;
 533                                         Trace.trace(Trace.PARSING, "Transfer encoding: " + ENCODING_STRING[i]);
 534                                 }
 535                         }
 536                 }
 537
 538                 return b;
 539         }
 540
 541         protected void close() {
 542                 try {
 543                         out.close();
 544                 } catch (Exception e) {
 545                         Trace.trace(Trace.PARSING, "Error closing connection " + this + " " + e.getMessage());
 546                 }
 547         }
 548
 549         protected void waitForResponse() {
 550                 Trace.trace(Trace.PARSING, "Waiting for response " + this);
 551                 synchronized (this) {
 552                         try {
 553                                 isWaiting = true;
 554                                 wait();
 555                         } catch (Exception e) {
 556                                 Trace.trace(Trace.PARSING, "Error in waitForResponse() " + this + " " + e.getMessage());
 557                         }
 558                         isWaiting = false;
 559                 }
 560                 Trace.trace(Trace.PARSING, "Done waiting for response " + this);
 561         }
 562
 563         protected void notifyRequest() {
 564                 Trace.trace(Trace.PARSING, "Notifying request " + this);
 565                 while (request.keepAlive && !request.isWaiting) {
 566                         Trace.trace(Trace.PARSING, "Waiting for request " + this);
 567                         try {
 568                                 Thread.sleep(100);
 569                         } catch (Exception e) { }
 570                 }
 571                 synchronized (request) {
 572                         try {
 573                                 request.notify();
 574                         } catch (Exception e) {
 575                                 Trace.trace(Trace.PARSING, "Error in notifyRequest() " + this + " " + e.getMessage());
 576                         }
 577                 }
 578                 Trace.trace(Trace.PARSING, "Done notifying request " + this);
 579         }
 580
 581         protected void setHTTPHeader(IRequest rr) {
 582                 if (isRequest) {
 583                         byte[] b = rr.getRequest(IRequest.ALL);
 584                         byte[] h = new byte[b.length];
 585                         System.arraycopy(b, 0, h, 0, b.length);
 586                         rr.addProperty(HTTPRequest.HTTP_REQUEST_HEADER, h);
 587                 } else {
 588                         byte[] b = rr.getResponse(IRequest.ALL);
 589                         byte[] h = new byte[b.length];
 590                         System.arraycopy(b, 0, h, 0, b.length);
 591                         rr.addProperty(HTTPRequest.HTTP_RESPONSE_HEADER, h);
 592                 }
 593         }
 594
 595         protected void setHTTPBody(byte[] b) {
 596                 IRequest rr = conn.getRequestResponse(isRequest);
 597                 if (isRequest)
 598                         rr.addProperty(HTTPRequest.HTTP_REQUEST_BODY, b);
 599                 else
 600                         rr.addProperty(HTTPRequest.HTTP_RESPONSE_BODY, b);
 601         }
 602 }