JS changes to work with mobile ApplicationSnapshot

11 files changed, 332 insertions, 12 deletions

diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/config/WebConfiguration.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/config/WebConfiguration.java
index 0ad96b04..28203683 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/config/WebConfiguration.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/config/WebConfiguration.java
@@ -49,6 +49,7 @@ public class WebConfiguration implements IConfigurationConstants {
 	public static final String PDF_AS_WORK_DIR = "pdfas.dir";
 	public static final String STATISTIC_BACKEND_LIST = "statistic.backends";
 	public static final String ALLOW_EXT_OVERWRITE = "allow.ext.overwrite";
+	public static final String ACCESSCOUNT = "accesscount";
 	
 	public static final String ALLOW_EXT_WHITELIST_VALUE_PRE = "ext.overwrite.wl.";
 	
@@ -514,6 +515,19 @@ public class WebConfiguration implements IConfigurationConstants {
 		return false;
 	}
 	
+	public static int getAccessCount() {
+		String value = properties.getProperty(ACCESSCOUNT);
+		int ivalue = 1;
+		if (value != null) {
+			try {
+				ivalue = Integer.parseInt(value);
+			} catch(NumberFormatException e) {
+				logger.warn(ACCESSCOUNT + " not a number", e);
+			}
+		}
+		return ivalue;
+	}
+	
 	public static int getFilesizeThreshold() {
 		String value = properties.getProperty(UPLOAD_FILESIZE_THRESHOLD);
 		int ivalue = THRESHOLD_SIZE;
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsHelper.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsHelper.java
index ab23e238..143df335 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsHelper.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsHelper.java
@@ -127,6 +127,7 @@ public class PdfAsHelper {
 	private static final String PRE_PROCESSOR_MAP = "PREPROCMAP";
 	private static final String OVERWRITE_MAP = "OVERWRITEMAP";
 	private static final String KEYID = "KEYID";
+	private static final String SESSION_ACCESS = "SESSION_ACCESS";
 
 	private static final String POSITIONING_URL = "/assets/js/pdf.js/web/viewer.html";
 
@@ -1229,7 +1230,7 @@ public class PdfAsHelper {
 	}
 
 	public static void regenerateSession(HttpServletRequest request) {
-		request.getSession(false).invalidate();
+		request.getSession(true).invalidate();
 		request.getSession(true);
 	}
 
@@ -1539,6 +1540,25 @@ public class PdfAsHelper {
 		}
 		return false;
 	}
+	
+	public static boolean isSessionAccessCounter(HttpServletRequest request) {
+		HttpSession session = request.getSession();
+		Object obj = session.getAttribute(SESSION_ACCESS);
+		if (obj == null) {
+			Integer value = 0;
+			session.setAttribute(SESSION_ACCESS, value);
+			obj = value;
+		} 
+		
+		if (obj instanceof Integer) {
+			Integer count = (Integer) obj;
+			count++;
+			session.setAttribute(SESSION_ACCESS, count);
+			return (count < WebConfiguration.getAccessCount());
+		} else {
+			return false;
+		}
+	}
 
 	public static String getVersion() {
 		return PdfAsFactory.getVersion();
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsParameterExtractor.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsParameterExtractor.java
index 53335ba6..f701ca63 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsParameterExtractor.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/helper/PdfAsParameterExtractor.java
@@ -75,6 +75,7 @@ public class PdfAsParameterExtractor {
 	public static final String PARAM_OVERWRITE_PREFIX = "ov:";
 	public static final String PARAM_QRCODE_CONTENT = "qrcontent";
 	public static final String PARAM_USER_POSITIONING = "upos";
+	public static final String PARAM_BASE64 = "base64";
 	
 	public static boolean isUserPositioning(HttpServletRequest request) {
 		String paramerterValue = (String)request.getAttribute(PARAM_USER_POSITIONING);
@@ -84,6 +85,14 @@ public class PdfAsParameterExtractor {
 		return false;
 	}
 	
+	public static boolean isBase64(HttpServletRequest request) {
+		String paramerterValue = (String)request.getAttribute(PARAM_BASE64);
+		if(paramerterValue != null) {
+			return Boolean.parseBoolean(paramerterValue);
+		} 
+		return false;
+	}
+	
 	public static String getConnector(HttpServletRequest request) {
 		String connector = (String)request.getAttribute(PARAM_CONNECTOR);
 		if(connector != null) {
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java
index 210a3cc3..ce5501c1 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java
@@ -103,7 +103,7 @@ public class ExternSignServlet extends HttpServlet {
 	protected void doGet(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
 
-		// PdfAsHelper.regenerateSession(request);
+		PdfAsHelper.regenerateSession(request);
 
 		logger.debug("Get signing request");
 
@@ -156,7 +156,7 @@ public class ExternSignServlet extends HttpServlet {
 	protected void doPost(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
 
-		// PdfAsHelper.regenerateSession(request);
+		PdfAsHelper.regenerateSession(request);
 
 		logger.debug("Post signing request");
 
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PDFData.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PDFData.java
index 4fce6860..cd2a8072 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PDFData.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PDFData.java
@@ -31,6 +31,7 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.commons.codec.binary.Base64;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -78,7 +79,7 @@ public class PDFData extends HttpServlet {
 	protected void process(HttpServletRequest request,
 			HttpServletResponse response) throws ServletException, IOException {
 		byte[] signedData = PdfAsHelper.getSignedPdf(request, response);
-
+		
 		StatisticEvent statisticEvent = PdfAsHelper.getStatisticEvent(request,
 				response);
 
@@ -126,13 +127,22 @@ public class PDFData extends HttpServlet {
 				response.setHeader("ValueCheckCode",
 						String.valueOf(resp.getValueCode()));
 			}
+			
+			//if(PdfAsParameterExtractor.isBase64(request)) {
+			//	signedData = Base64.encodeBase64(signedData);
+			//}
+			
+			response.setContentLength(signedData.length);
+			
 			response.setContentType("application/pdf");
 			OutputStream os = response.getOutputStream();
 			os.write(signedData);
 			os.close();
 
 			// When data is collected destroy session!
-			request.getSession().invalidate();
+			if(!PdfAsHelper.isSessionAccessCounter(request)) {
+				request.getSession().invalidate();
+			}
 		} else {
 			PdfAsHelper.setSessionException(request, response,
 					"No signed pdf document available.", null);
diff --git a/pdf-as-web/src/main/webapp/assets/js/Blob.js b/pdf-as-web/src/main/webapp/assets/js/Blob.js
new file mode 100644
index 00000000..2e41b8a2
--- /dev/null
+++ b/pdf-as-web/src/main/webapp/assets/js/Blob.js
@@ -0,0 +1,211 @@
+/* Blob.js
+ * A Blob implementation.
+ * 2014-07-24
+ *
+ * By Eli Grey, http://eligrey.com
+ * By Devin Samarin, https://github.com/dsamarin
+ * License: X11/MIT
+ *   See https://github.com/eligrey/Blob.js/blob/master/LICENSE.md
+ */
+
+/*global self, unescape */
+/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
+  plusplus: true */
+
+/*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */
+
+(function (view) {
+	"use strict";
+
+	view.URL = view.URL || view.webkitURL;
+
+	if (view.Blob && view.URL) {
+		try {
+			new Blob;
+			return;
+		} catch (e) {}
+	}
+
+	// Internally we use a BlobBuilder implementation to base Blob off of
+	// in order to support older browsers that only have BlobBuilder
+	var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) {
+		var
+			  get_class = function(object) {
+				return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
+			}
+			, FakeBlobBuilder = function BlobBuilder() {
+				this.data = [];
+			}
+			, FakeBlob = function Blob(data, type, encoding) {
+				this.data = data;
+				this.size = data.length;
+				this.type = type;
+				this.encoding = encoding;
+			}
+			, FBB_proto = FakeBlobBuilder.prototype
+			, FB_proto = FakeBlob.prototype
+			, FileReaderSync = view.FileReaderSync
+			, FileException = function(type) {
+				this.code = this[this.name = type];
+			}
+			, file_ex_codes = (
+				  "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
+				+ "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
+			).split(" ")
+			, file_ex_code = file_ex_codes.length
+			, real_URL = view.URL || view.webkitURL || view
+			, real_create_object_URL = real_URL.createObjectURL
+			, real_revoke_object_URL = real_URL.revokeObjectURL
+			, URL = real_URL
+			, btoa = view.btoa
+			, atob = view.atob
+
+			, ArrayBuffer = view.ArrayBuffer
+			, Uint8Array = view.Uint8Array
+
+			, origin = /^[\w-]+:\/*\[?[\w\.:-]+\]?(?::[0-9]+)?/
+		;
+		FakeBlob.fake = FB_proto.fake = true;
+		while (file_ex_code--) {
+			FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
+		}
+		// Polyfill URL
+		if (!real_URL.createObjectURL) {
+			URL = view.URL = function(uri) {
+				var
+					  uri_info = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
+					, uri_origin
+				;
+				uri_info.href = uri;
+				if (!("origin" in uri_info)) {
+					if (uri_info.protocol.toLowerCase() === "data:") {
+						uri_info.origin = null;
+					} else {
+						uri_origin = uri.match(origin);
+						uri_info.origin = uri_origin && uri_origin[1];
+					}
+				}
+				return uri_info;
+			};
+		}
+		URL.createObjectURL = function(blob) {
+			var
+				  type = blob.type
+				, data_URI_header
+			;
+			if (type === null) {
+				type = "application/octet-stream";
+			}
+			if (blob instanceof FakeBlob) {
+				data_URI_header = "data:" + type;
+				if (blob.encoding === "base64") {
+					return data_URI_header + ";base64," + blob.data;
+				} else if (blob.encoding === "URI") {
+					return data_URI_header + "," + decodeURIComponent(blob.data);
+				} if (btoa) {
+					return data_URI_header + ";base64," + btoa(blob.data);
+				} else {
+					return data_URI_header + "," + encodeURIComponent(blob.data);
+				}
+			} else if (real_create_object_URL) {
+				return real_create_object_URL.call(real_URL, blob);
+			}
+		};
+		URL.revokeObjectURL = function(object_URL) {
+			if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
+				real_revoke_object_URL.call(real_URL, object_URL);
+			}
+		};
+		FBB_proto.append = function(data/*, endings*/) {
+			var bb = this.data;
+			// decode data to a binary string
+			if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
+				var
+					  str = ""
+					, buf = new Uint8Array(data)
+					, i = 0
+					, buf_len = buf.length
+				;
+				for (; i < buf_len; i++) {
+					str += String.fromCharCode(buf[i]);
+				}
+				bb.push(str);
+			} else if (get_class(data) === "Blob" || get_class(data) === "File") {
+				if (FileReaderSync) {
+					var fr = new FileReaderSync;
+					bb.push(fr.readAsBinaryString(data));
+				} else {
+					// async FileReader won't work as BlobBuilder is sync
+					throw new FileException("NOT_READABLE_ERR");
+				}
+			} else if (data instanceof FakeBlob) {
+				if (data.encoding === "base64" && atob) {
+					bb.push(atob(data.data));
+				} else if (data.encoding === "URI") {
+					bb.push(decodeURIComponent(data.data));
+				} else if (data.encoding === "raw") {
+					bb.push(data.data);
+				}
+			} else {
+				if (typeof data !== "string") {
+					data += ""; // convert unsupported types to strings
+				}
+				// decode UTF-16 to binary string
+				bb.push(unescape(encodeURIComponent(data)));
+			}
+		};
+		FBB_proto.getBlob = function(type) {
+			if (!arguments.length) {
+				type = null;
+			}
+			return new FakeBlob(this.data.join(""), type, "raw");
+		};
+		FBB_proto.toString = function() {
+			return "[object BlobBuilder]";
+		};
+		FB_proto.slice = function(start, end, type) {
+			var args = arguments.length;
+			if (args < 3) {
+				type = null;
+			}
+			return new FakeBlob(
+				  this.data.slice(start, args > 1 ? end : this.data.length)
+				, type
+				, this.encoding
+			);
+		};
+		FB_proto.toString = function() {
+			return "[object Blob]";
+		};
+		FB_proto.close = function() {
+			this.size = 0;
+			delete this.data;
+		};
+		return FakeBlobBuilder;
+	}(view));
+
+	view.Blob = function(blobParts, options) {
+		var type = options ? (options.type || "") : "";
+		var builder = new BlobBuilder();
+		if (blobParts) {
+			for (var i = 0, len = blobParts.length; i < len; i++) {
+				if (Uint8Array && blobParts[i] instanceof Uint8Array) {
+					builder.append(blobParts[i].buffer);
+				}
+				else {
+					builder.append(blobParts[i]);
+				}
+			}
+		}
+		var blob = builder.getBlob(type);
+		if (!blob.slice && blob.webkitSlice) {
+			blob.slice = blob.webkitSlice;
+		}
+		return blob;
+	};
+
+	var getPrototypeOf = Object.getPrototypeOf || function(object) {
+		return object.__proto__;
+	};
+	view.Blob.prototype = getPrototypeOf(new view.Blob());
+}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));
diff --git a/pdf-as-web/src/main/webapp/assets/js/FileSaver.min.js b/pdf-as-web/src/main/webapp/assets/js/FileSaver.min.js
new file mode 100644
index 00000000..8bbbf769
--- /dev/null
+++ b/pdf-as-web/src/main/webapp/assets/js/FileSaver.min.js
@@ -0,0 +1,2 @@
+/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
+var saveAs=saveAs||function(e){"use strict";if(typeof navigator!=="undefined"&&/MSIE [1-9]\./.test(navigator.userAgent)){return}var t=e.document,n=function(){return e.URL||e.webkitURL||e},r=t.createElementNS("http://www.w3.org/1999/xhtml","a"),i="download"in r,o=function(e){var t=new MouseEvent("click");e.dispatchEvent(t)},a=/Version\/[\d\.]+.*Safari/.test(navigator.userAgent),f=e.webkitRequestFileSystem,u=e.requestFileSystem||f||e.mozRequestFileSystem,s=function(t){(e.setImmediate||e.setTimeout)(function(){throw t},0)},c="application/octet-stream",d=0,l=500,w=function(t){var r=function(){if(typeof t==="string"){n().revokeObjectURL(t)}else{t.remove()}};if(e.chrome){r()}else{setTimeout(r,l)}},p=function(e,t,n){t=[].concat(t);var r=t.length;while(r--){var i=e["on"+t[r]];if(typeof i==="function"){try{i.call(e,n||e)}catch(o){s(o)}}}},v=function(e){if(/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(e.type)){return new Blob(["\ufeff",e],{type:e.type})}return e},y=function(t,s,l){if(!l){t=v(t)}var y=this,m=t.type,S=false,h,R,O=function(){p(y,"writestart progress write writeend".split(" "))},g=function(){if(R&&a&&typeof FileReader!=="undefined"){var r=new FileReader;r.onloadend=function(){var e=r.result;R.location.href="data:attachment/file"+e.slice(e.search(/[,;]/));y.readyState=y.DONE;O()};r.readAsDataURL(t);y.readyState=y.INIT;return}if(S||!h){h=n().createObjectURL(t)}if(R){R.location.href=h}else{var i=e.open(h,"_blank");if(i==undefined&&a){e.location.href=h}}y.readyState=y.DONE;O();w(h)},b=function(e){return function(){if(y.readyState!==y.DONE){return e.apply(this,arguments)}}},E={create:true,exclusive:false},N;y.readyState=y.INIT;if(!s){s="download"}if(i){h=n().createObjectURL(t);r.href=h;r.download=s;setTimeout(function(){o(r);O();w(h);y.readyState=y.DONE});return}if(e.chrome&&m&&m!==c){N=t.slice||t.webkitSlice;t=N.call(t,0,t.size,c);S=true}if(f&&s!=="download"){s+=".download"}if(m===c||f){R=e}if(!u){g();return}d+=t.size;u(e.TEMPORARY,d,b(function(e){e.root.getDirectory("saved",E,b(function(e){var n=function(){e.getFile(s,E,b(function(e){e.createWriter(b(function(n){n.onwriteend=function(t){R.location.href=e.toURL();y.readyState=y.DONE;p(y,"writeend",t);w(e)};n.onerror=function(){var e=n.error;if(e.code!==e.ABORT_ERR){g()}};"writestart progress write abort".split(" ").forEach(function(e){n["on"+e]=y["on"+e]});n.write(t);y.abort=function(){n.abort();y.readyState=y.DONE};y.readyState=y.WRITING}),g)}),g)};e.getFile(s,{create:false},b(function(e){e.remove();n()}),b(function(e){if(e.code===e.NOT_FOUND_ERR){n()}else{g()}}))}),g)}),g)},m=y.prototype,S=function(e,t,n){return new y(e,t,n)};if(typeof navigator!=="undefined"&&navigator.msSaveOrOpenBlob){return function(e,t,n){if(!n){e=v(e)}return navigator.msSaveOrOpenBlob(e,t||"download")}}m.abort=function(){var e=this;e.readyState=e.DONE;p(e,"abort")};m.readyState=m.INIT=0;m.WRITING=1;m.DONE=2;m.error=m.onwritestart=m.onprogress=m.onwrite=m.onabort=m.onerror=m.onwriteend=null;return S}(typeof self!=="undefined"&&self||typeof window!=="undefined"&&window||this.content);if(typeof module!=="undefined"&&module.exports){module.exports.saveAs=saveAs}else if(typeof define!=="undefined"&&define!==null&&define.amd!=null){define([],function(){return saveAs})}
\ No newline at end of file
diff --git a/pdf-as-web/src/main/webapp/assets/js/dragNdrop.js b/pdf-as-web/src/main/webapp/assets/js/dragNdrop.js
index 62270ece..76a68c62 100644
--- a/pdf-as-web/src/main/webapp/assets/js/dragNdrop.js
+++ b/pdf-as-web/src/main/webapp/assets/js/dragNdrop.js
@@ -18,6 +18,29 @@ var local_success = false;
 var keystore_success = false;
 var place_on_new_page = false;
 
+function getArrayBuffer(data) {
+    if (typeof data !== 'string') {
+      return data;
+    }
+    var length = data.length;
+    var array = new Uint8Array(length);
+    for (var i = 0; i < length; i++) {
+      array[i] = data.charCodeAt(i) & 0xFF;
+    }
+    return array.buffer;
+}
+
+function getArrayBase64(base64) {
+	var raw = window.atob(base64);
+	var rawLength = raw.length;
+	var array = new Uint8Array(new ArrayBuffer(rawLength));
+
+	for (i = 0; i < rawLength; i++) {
+	    array[i] = raw.charCodeAt(i);
+	}
+	return array;
+}
+
 function registerEventListeners() {
 	var locale = "EN";
 	var connector = "mobilebku";
@@ -122,7 +145,22 @@ function registerEventListeners() {
 		$("#DownloadResultButton").attr("title", "The download is valid only once!");
 		$("#DownloadResultButton").css("pointer-events", "none");
 		
-		//window.open($("#DownloadResultButton").attr("href"));
+		/*
+		var isFileSaverSupported = false;
+		try {
+		    isFileSaverSupported = !!new XMLHttpRequest;
+		} catch (e) {}
+		
+		if(isFileSaverSupported) {
+			evt.preventDefault();
+			$.get( $("#DownloadResultButton").attr("href") + "?base64=true", function( data ) {
+				var array = getArrayBase64(data);
+				saveAs(new Blob([array], { type: "application/pdf" }), "signed.pdf");
+			});
+		}
+		*/
+		evt.preventDefault();
+		window.open($("#DownloadResultButton").attr("href"));
 		
 		//return false;
 	});
@@ -590,7 +628,7 @@ function toggleLanguage()
 	{
 		$("#LanguageDisplay").html
 		(
-				"<span class='label label-info'><span class='flag-icon flag-icon-de'></span> DE</span>"
+				"<span class='label label-info'><span class='flag-icon flag-icon-at'></span> AT</span>"
 		);
 		
 		default_language = "en";
diff --git a/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js b/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
index 1af630d6..d21f5d51 100644
--- a/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
+++ b/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
@@ -458,8 +458,6 @@ function makeSignatureDraggable(signature) {
 //
 function updateSignaturePosition(signature) {
 	var page = signature.page;
-	var canvas_height = $("#page" + page.toString()).attr("height");
-	var current_scale = PDFViewerApplication.pdfViewer.currentScale;
 	var thisPos = $(signature.sig).position();
 	var x;
 	var y;
@@ -467,9 +465,10 @@ function updateSignaturePosition(signature) {
 	x = thisPos.left;
 	y = thisPos.top; 
 
+	var pdfPos = PDFViewerApplication.pdfViewer.pages[page-1].viewport.convertToPdfPoint(x, y);
 
-	signature.posx = Math.floor(x / current_scale / (4.0/3.0)).toString();
-	signature.posy = Math.floor((parseInt(canvas_height) - (y)) / current_scale / (4.0/3.0)).toString();
+	signature.posx = pdfPos[0];
+	signature.posy = pdfPos[1];
 		
 		
 	last_left = $("#img_signature").css("left");
diff --git a/pdf-as-web/src/main/webapp/assets/js/postman.js b/pdf-as-web/src/main/webapp/assets/js/postman.js
new file mode 100644
index 00000000..e13c0ee7
--- /dev/null
+++ b/pdf-as-web/src/main/webapp/assets/js/postman.js
@@ -0,0 +1,15 @@
+// postMessage 
+// ----------------------------------------------------------------------
+/*
+ * nojquery-postmessage by Jeff Lee
+ * a non-jQuery fork of:
+ *
+ * jQuery postMessage - v0.5 - 9/11/2009
+ * http://benalman.com/projects/jquery-postmessage-plugin/
+ *
+ * Copyright (c) 2009 "Cowboy" Ben Alman
+ * Dual licensed under the MIT and GPL licenses.
+ * http://benalman.com/about/license/
+ */
+function NoJQueryPostMessageMixin(g,a){var b,h,e,d,f,c=1;if(window.postMessage){if(window.addEventListener){b=function(i){window.addEventListener("message",i,false)};h=function(i){window.removeEventListener("message",i,false)}}else{b=function(i){window.attachEvent("onmessage",i)};h=function(i){window.detachEvent("onmessage",i)}}this[g]=function(i,k,j){if(!k){return}j.postMessage(i,k.replace(/([^:]+:\/\/[^\/]+).*/,"$1"))};this[a]=function(k,j,i){if(e){h(e);e=null}if(!k){return false}e=b(function(l){switch(Object.prototype.toString.call(j)){case"[object String]":if(j!==l.origin){return false}break;case"[object Function]":if(j(l.origin)){return false}break}k(l)})}}else{this[g]=function(i,k,j){if(!k){return}j.location=k.replace(/#.*$/,"")+"#"+(+new Date)+(c++)+"&"+i};this[a]=function(k,j,i){if(d){clearInterval(d);d=null}if(k){i=typeof j==="number"?j:typeof i==="number"?i:100;d=setInterval(function(){var m=document.location.hash,l=/^#?\d+&/;if(m!==f&&l.test(m)){f=m;k({data:m.replace(l,"")})}},i)}}}return this};
+//----------------------------------------------------------------------
diff --git a/pdf-as-web/src/main/webapp/index.jsp b/pdf-as-web/src/main/webapp/index.jsp
index 283d1294..c823d044 100644
--- a/pdf-as-web/src/main/webapp/index.jsp
+++ b/pdf-as-web/src/main/webapp/index.jsp
@@ -10,6 +10,8 @@
 	<script src="assets/js/jquery.min.js"></script>
 	<script src="assets/js/jquery-ui.min.js"></script>
 	<script src="assets/js/pdf.js/build/pdf.js"></script>
+	<script src="assets/js/Blob.js"></script>
+	<script src="assets/js/FileSaver.min.js"></script>
 	<script src="assets/js/dragNdrop.js"></script>
 	<script src="assets/js/jquery-lang.js"></script>
 	<script src="assets/js/js.cookie.js"></script>
@@ -36,7 +38,7 @@
 	<!-- Header -->
 	<div class="row" id="LanguageSwitchContainer">
 	<h2 id="PageTitle" class="pull-left" lang="en">PDF-Signature Online</h2>
-	<h4 id="LanguageDisplay" class="pull-right"><span class="label label-info"><span class="flag-icon flag-icon-de"></span> DE</span></h4>
+	<h4 id="LanguageDisplay" class="pull-right"><span class="label label-info"><span class="flag-icon flag-icon-at"></span> AT</span></h4>
 	</div>
 <div class="row center">
 	  <div class="" id="navBar">