/** Example of reading request by chunk and getting values from chunk to chunk */ private void readHttpDataChunkByChunk() { try { while (decoder.hasNext()) { InterfaceHttpData data = decoder.next(); if (data != null) { try { // new value writeHttpData(data); } finally { data.release(); } } } } catch (EndOfDataDecoderException e1) { // end responseContent.append("\r\n\r\nEND OF CONTENT CHUNK BY CHUNK\r\n\r\n"); } }
/** Example of reading request by chunk and getting values from chunk to chunk */ private void readHttpDataChunkByChunk() { try { while (decoder.hasNext()) { InterfaceHttpData data = decoder.next(); if (data != null) { // check if current HttpData is a FileUpload and previously set as partial if (partialContent == data) { logger.info(" 100% (FinalSize: " + partialContent.length() + ")"); partialContent = null; } try { // new value writeHttpData(data); } finally { data.release(); } } } // Check partial decoding for a FileUpload InterfaceHttpData data = decoder.currentPartialHttpData(); if (data != null) { StringBuilder builder = new StringBuilder(); if (partialContent == null) { partialContent = (HttpData) data; if (partialContent instanceof FileUpload) { builder .append("Start FileUpload: ") .append(((FileUpload) partialContent).getFilename()) .append(" "); } else { builder.append("Start Attribute: ").append(partialContent.getName()).append(" "); } builder.append("(DefinedSize: ").append(partialContent.definedLength()).append(")"); } if (partialContent.definedLength() > 0) { builder .append(" ") .append(partialContent.length() * 100 / partialContent.definedLength()) .append("% "); logger.info(builder.toString()); } else { builder.append(" ").append(partialContent.length()).append(" "); logger.info(builder.toString()); } } } catch (EndOfDataDecoderException e1) { // end responseContent.append("\r\n\r\nEND OF CONTENT CHUNK BY CHUNK\r\n\r\n"); } }
@Override public void messageReceived(ChannelHandlerContext ctx, HttpObject msg) throws Exception { if (msg instanceof HttpRequest) { HttpRequest request = this.request = (HttpRequest) msg; URI uri = new URI(request.uri()); if (!uri.getPath().startsWith("/form")) { // Write Menu writeMenu(ctx); return; } responseContent.setLength(0); responseContent.append("WELCOME TO THE WILD WILD WEB SERVER\r\n"); responseContent.append("===================================\r\n"); responseContent.append("VERSION: " + request.protocolVersion().text() + "\r\n"); responseContent.append("REQUEST_URI: " + request.uri() + "\r\n\r\n"); responseContent.append("\r\n\r\n"); // new getMethod for (Entry<CharSequence, CharSequence> entry : request.headers()) { responseContent.append("HEADER: " + entry.getKey() + '=' + entry.getValue() + "\r\n"); } responseContent.append("\r\n\r\n"); // new getMethod Set<Cookie> cookies; String value = request.headers().getAndConvert(HttpHeaderNames.COOKIE); if (value == null) { cookies = Collections.emptySet(); } else { cookies = ServerCookieDecoder.STRICT.decode(value); } for (Cookie cookie : cookies) { responseContent.append("COOKIE: " + cookie + "\r\n"); } responseContent.append("\r\n\r\n"); QueryStringDecoder decoderQuery = new QueryStringDecoder(request.uri()); Map<String, List<String>> uriAttributes = decoderQuery.parameters(); for (Entry<String, List<String>> attr : uriAttributes.entrySet()) { for (String attrVal : attr.getValue()) { responseContent.append("URI: " + attr.getKey() + '=' + attrVal + "\r\n"); } } responseContent.append("\r\n\r\n"); // if GET Method: should not try to create a HttpPostRequestDecoder if (request.method().equals(HttpMethod.GET)) { // GET Method: should not try to create a HttpPostRequestDecoder // So stop here responseContent.append("\r\n\r\nEND OF GET CONTENT\r\n"); // Not now: LastHttpContent will be sent writeResponse(ctx.channel()); return; } try { decoder = new HttpPostRequestDecoder(factory, request); } catch (ErrorDataDecoderException e1) { e1.printStackTrace(); responseContent.append(e1.getMessage()); writeResponse(ctx.channel()); ctx.channel().close(); return; } readingChunks = HttpHeaderUtil.isTransferEncodingChunked(request); responseContent.append("Is Chunked: " + readingChunks + "\r\n"); responseContent.append("IsMultipart: " + decoder.isMultipart() + "\r\n"); if (readingChunks) { // Chunk version responseContent.append("Chunks: "); readingChunks = true; } } // check if the decoder was constructed before // if not it handles the form get if (decoder != null) { if (msg instanceof HttpContent) { // New chunk is received HttpContent chunk = (HttpContent) msg; try { decoder.offer(chunk); } catch (ErrorDataDecoderException e1) { e1.printStackTrace(); responseContent.append(e1.getMessage()); writeResponse(ctx.channel()); ctx.channel().close(); return; } responseContent.append('o'); // example of reading chunk by chunk (minimize memory usage due to // Factory) readHttpDataChunkByChunk(); // example of reading only if at the end if (chunk instanceof LastHttpContent) { writeResponse(ctx.channel()); readingChunks = false; reset(); } } } else { writeResponse(ctx.channel()); } }
private void writeMenu(ChannelHandlerContext ctx) { // print several HTML forms // Convert the response content to a ChannelBuffer. responseContent.setLength(0); // create Pseudo Menu responseContent.append("<html>"); responseContent.append("<head>"); responseContent.append("<title>Netty Test Form</title>\r\n"); responseContent.append("</head>\r\n"); responseContent.append("<body bgcolor=white><style>td{font-size: 12pt;}</style>"); responseContent.append("<table border=\"0\">"); responseContent.append("<tr>"); responseContent.append("<td>"); responseContent.append("<h1>Netty Test Form</h1>"); responseContent.append("Choose one FORM"); responseContent.append("</td>"); responseContent.append("</tr>"); responseContent.append("</table>\r\n"); // GET responseContent.append("<CENTER>GET FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); responseContent.append("<FORM ACTION=\"/formget\" METHOD=\"GET\">"); responseContent.append("<input type=hidden name=getform value=\"GET\">"); responseContent.append("<table border=\"0\">"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>"); responseContent.append( "<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>"); responseContent.append("</td></tr>"); responseContent.append( "<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>"); responseContent.append( "<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>"); responseContent.append("</table></FORM>\r\n"); responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); // POST responseContent.append("<CENTER>POST FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); responseContent.append("<FORM ACTION=\"/formpost\" METHOD=\"POST\">"); responseContent.append("<input type=hidden name=getform value=\"POST\">"); responseContent.append("<table border=\"0\">"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>"); responseContent.append( "<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>"); responseContent.append( "<tr><td>Fill with file (only file name will be transmitted): <br> " + "<input type=file name=\"myfile\">"); responseContent.append("</td></tr>"); responseContent.append( "<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>"); responseContent.append( "<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>"); responseContent.append("</table></FORM>\r\n"); responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); // POST with enctype="multipart/form-data" responseContent.append( "<CENTER>POST MULTIPART FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); responseContent.append( "<FORM ACTION=\"/formpostmultipart\" ENCTYPE=\"multipart/form-data\" METHOD=\"POST\">"); responseContent.append("<input type=hidden name=getform value=\"POST\">"); responseContent.append("<table border=\"0\">"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>"); responseContent.append( "<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>"); responseContent.append( "<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>"); responseContent.append("<tr><td>Fill with file: <br> <input type=file name=\"myfile\">"); responseContent.append("</td></tr>"); responseContent.append( "<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>"); responseContent.append( "<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>"); responseContent.append("</table></FORM>\r\n"); responseContent.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>"); responseContent.append("</body>"); responseContent.append("</html>"); ByteBuf buf = copiedBuffer(responseContent.toString(), CharsetUtil.UTF_8); // Build the response object. FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, buf); response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8"); response.headers().setInt(HttpHeaderNames.CONTENT_LENGTH, buf.readableBytes()); // Write the response. ctx.channel().writeAndFlush(response); }
private void writeHttpData(InterfaceHttpData data) { if (data.getHttpDataType() == HttpDataType.Attribute) { Attribute attribute = (Attribute) data; String value; try { value = attribute.getValue(); } catch (IOException e1) { // Error while reading data from File, only print name and error e1.printStackTrace(); responseContent.append( "\r\nBODY Attribute: " + attribute.getHttpDataType().name() + ": " + attribute.getName() + " Error while reading value: " + e1.getMessage() + "\r\n"); return; } if (value.length() > 100) { responseContent.append( "\r\nBODY Attribute: " + attribute.getHttpDataType().name() + ": " + attribute.getName() + " data too long\r\n"); } else { responseContent.append( "\r\nBODY Attribute: " + attribute.getHttpDataType().name() + ": " + attribute + "\r\n"); } } else { responseContent.append( "\r\nBODY FileUpload: " + data.getHttpDataType().name() + ": " + data + "\r\n"); if (data.getHttpDataType() == HttpDataType.FileUpload) { FileUpload fileUpload = (FileUpload) data; if (fileUpload.isCompleted()) { if (fileUpload.length() < 10000) { responseContent.append("\tContent of file\r\n"); try { responseContent.append(fileUpload.getString(fileUpload.getCharset())); } catch (IOException e1) { // do nothing for the example e1.printStackTrace(); } responseContent.append("\r\n"); } else { responseContent.append( "\tFile too long to be printed out:" + fileUpload.length() + "\r\n"); } // fileUpload.isInMemory();// tells if the file is in Memory // or on File // fileUpload.renameTo(dest); // enable to move into another // File dest // decoder.removeFileUploadFromClean(fileUpload); //remove // the File of to delete file } else { responseContent.append("\tFile to be continued but should not!\r\n"); } } } }