diff --git a/config.ru b/config.ru
index 8ea34c9f..c963574f 100644
--- a/config.ru
+++ b/config.ru
@@ -4,7 +4,21 @@ require 'bundler'
 Bundler.require
 require_relative './webapp/tabula_settings.rb'
 require_relative './webapp/tabula_web.rb'
-run Cuba
+
+potential_root_uri_without_slashes = (defined?($servlet_context) ? $servlet_context.getContextPath : ENV["ROOT_URI"])
+
+if potential_root_uri_without_slashes.nil? || potential_root_uri_without_slashes == ''
+  ROOT_URI = '/'
+else
+  ROOT_URI = (potential_root_uri_without_slashes[0] == "/" ? '' : '/') + potential_root_uri_without_slashes +  (potential_root_uri_without_slashes[-1] == "/" ? '' : '/')
+end
+
+puts "running under #{ROOT_URI} as root URI" 
+
+
+map ROOT_URI do 
+  run Cuba
+end
 
 if "#{$PROGRAM_NAME}".include?("tabula.jar")
   # only do this if running as jar or app. (if "rackup", we don't
diff --git a/webapp/index.html b/webapp/index.html
index 268745aa..543a3428 100644
--- a/webapp/index.html
+++ b/webapp/index.html
@@ -7,15 +7,17 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="description" content="">
     <meta name="author" content="">
-    <link rel="shortcut icon" href="/img/favicon.ico" type="image/x-icon">
-    <link rel="icon" href="/img/favicon.ico" type="image/x-icon">
+    <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon">
+    <link rel="icon" href="img/favicon.ico" type="image/x-icon">
 
     <title>Tabula</title>
 
-    <link href="/css/styles.css" rel="stylesheet">
+    <base href="/"><!-- overwritten dynamically with the value of $servlet_context.getContextPath or ENV["ROOT_URI"] -->
+
+    <link href="css/styles.css" rel="stylesheet">
 
     <!-- Selector-specific CSS -->
-    <link href="/css/selectors.css" rel="stylesheet">
+    <link href="css/selectors.css" rel="stylesheet">
 
     <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
     <!--[if lt IE 9]>
@@ -23,10 +25,10 @@
       <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
     <![endif]-->
 
-    <script type="text/javascript" src="/js/vendor/jquery.min.js"></script>
-    <script type="text/javascript" src="/js/vendor/underscore-min.js"></script>
-    <script type="text/javascript" src="/js/vendor/backbone-min.js"></script>
-    <script type="text/javascript" src="/js/vendor/bootstrap.js"></script>
+    <script type="text/javascript" src="js/vendor/jquery.min.js"></script>
+    <script type="text/javascript" src="js/vendor/underscore-min.js"></script>
+    <script type="text/javascript" src="js/vendor/backbone-min.js"></script>
+    <script type="text/javascript" src="js/vendor/bootstrap.js"></script>
   </head>
 
 
@@ -37,13 +39,13 @@
     <nav class="navbar navbar-default navbar-fixed-top" role="navigation">
       <div class="container">
         <div class="navbar-header">
-          <a class="navbar-brand" href="/">Tabula</a>
+          <a class="navbar-brand" href="">Tabula</a>
         </div>
         <div id="navbar" class="navbar-collapse collapse">
           <ul class="nav navbar-nav">
-            <li><a id="upload-nav" href="/">My Files</a></li>
-            <li><a id="about-nav" href="/about">About</a></li>
-            <li><a id="help-nav" href="/help">Help</a></li>
+            <li><a id="upload-nav" href="">My Files</a></li>
+            <li><a id="about-nav" href="about">About</a></li>
+            <li><a id="help-nav" href="help">Help</a></li>
             <li><a href="https://github.com/tabulapdf/tabula">Source Code</a></li>
           </ul>
         </div><!--/.nav-collapse -->
@@ -77,7 +79,7 @@
       </script>
 
       <script type="text/template" id="export-control-panel-template">
-        <form id="download-form" action="/pdf/<%=pdf_id%>/data?format=csv" method="post">
+        <form id="download-form" action="pdf/<%=pdf_id%>/data?format=csv" method="post">
           <div id="hidden-fields">
             <input type='hidden' class='data-query' name='new_filename' value='<%=original_filename%>' >
             <input type='hidden' class='data-query' name='coords' value='<%=list_of_coords%>' >
@@ -95,7 +97,7 @@
             <!-- <option value="xml">XML</option> -->
             <option value="script">Script</option>
           </select>
-          <button type="submit" <%=disableIfNoData%> id="download-data" class="btn btn-default" data-action='/pdf/<%=pdf_id%>/data'>
+          <button type="submit" <%=disableIfNoData%> id="download-data" class="btn btn-default" data-action='pdf/<%=pdf_id%>/data'>
             <span class="glyphicon glyphicon-refresh"></span>
             <span class="glyphicon glyphicon-download"></span>
             Export
@@ -191,11 +193,11 @@ <h2>Preview of Extracted Tabular Data</h2>
           <div id="pages-container">
           </div>
         </div>
-        <nestedscript type="text/javascript" src="/js/vendor/spin.min.js"></nestedscript>
-        <nestedscript type="text/javascript" src="/js/resizableSelection.js"></nestedscript>
-        <nestedscript type="text/javascript" src="/js/rectangularSelector.js"></nestedscript>
-        <nestedscript type="text/javascript" src="/js/vendor/ZeroClipboard.min.js"></nestedscript>
-        <!-- <nestedscript type="text/javascript" src="/js/debug_pdf_view.js"></nestedscript>  -->
+        <nestedscript type="text/javascript" src="js/vendor/spin.min.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/resizableSelection.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/rectangularSelector.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/vendor/ZeroClipboard.min.js"></nestedscript>
+        <!-- <nestedscript type="text/javascript" src="js/debug_pdf_view.js"></nestedscript>  -->
       </script>
 
 
@@ -302,9 +304,9 @@ <h4>Imported PDFs</h4>
         </div> <!-- /container -->
 
         <!-- we are using this here: http://www.abeautifulsite.net/whipping-file-inputs-into-shape-with-bootstrap-3/ -->
-        <nestedscript type="text/javascript" src="/js/vendor/upload-group.js"></nestedscript>
-        <nestedscript type="text/javascript" src="/js/vendor/jquery.tablesorter.min.js"></nestedscript>
-        <nestedscript type="text/javascript" src="/js/vendor/spin.min.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/vendor/upload-group.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/vendor/jquery.tablesorter.min.js"></nestedscript>
+        <nestedscript type="text/javascript" src="js/vendor/spin.min.js"></nestedscript>
       </script>
 
       <script type="text/template" id="uploaded-file-template">
@@ -313,7 +315,7 @@ <h4>Imported PDFs</h4>
         <td><%= page_count || '??' %></td>
         <td><%= new Date(parseInt(time) * 1000).toUTCString().slice(5, -7) %></td>
         <td><a href="javascript:"><span data-filename=<%= original_filename %> data-pdfid=<%= id %> class="glyphicon glyphicon-remove delete-pdf"></span></a></td>
-        <td><a href="/pdf/<%= id %>"><button type="button" class="btn btn-sm btn-success">Extract Data</button></a></td>
+        <td><a href="pdf/<%= id %>"><button type="button" class="btn btn-sm btn-success">Extract Data</button></a></td>
       </script>
 
       <script type="text/template" id="upload-error-template" >
@@ -375,7 +377,7 @@ <h3 name="trouble">Having trouble with Tabula?</h3>
           <li><strong>Some columns of my table are combined. And the headers aren't the problem! What <em>else</em> can I do?</strong> Tabula has two extraction methods. It tries to guess which one is right for document, but it's wrong sometimes. Try selecting the other (of "stream" and "lattice"), on the left in extraction mode, to see if that fixes the problem.</li>
           <li><strong>Tabula helps, but my extracted data isn't in the layout I want! How can I fix <em>that</em>?</strong> Tabula tries to recreate the table structure of the original document. You can think of Tabula as a data <em>extraction</em> tool rather than a data <em>transformation</em> tool. If you want to clean and transform your exported CSV or TSV, tools such as <a href="http://openrefine.org/">OpenRefine</a> or a spreadsheet program might be a good place to start.</li>
           <li><strong>Tabula's taking too long!</strong> Sorry! Tabula has to do a lot of weird math to reconstruct your table. Tabula's command-line counterpart, <a href="https://www.github.com/tabulapdf/tabula-extractor">tabula-extractor</a> is faster, but a little harder to use. You might give it a try.</li>
-          <li><strong>I had some other problem!</strong> Sorry! You can <a href="https://www.github.com/tabulapdf/tabula/issues/new">report it to us here</a>. Be sure to include your PDF, either as a link or attached to the issue -- or email it to <a href="/about">one of the Tabula creators.</a> </li>
+          <li><strong>I had some other problem!</strong> Sorry! You can <a href="https://www.github.com/tabulapdf/tabula/issues/new">report it to us here</a>. Be sure to include your PDF, either as a link or attached to the issue -- or email it to <a href="about">one of the Tabula creators.</a> </li>
           </ol>
 
           </div> <!-- /jumbotron -->
@@ -394,7 +396,7 @@ <h3 name="trouble">Having trouble with Tabula?</h3>
 
     </script> <!-- TODO: move this to tabula.js, only run it if we're in upload page viewer -->
 
-    <script type="text/javascript" src="/js/tabula.js?_cachebuster=201510300905"></script> <!-- actually starts Tabula -->
+    <script type="text/javascript" src="js/tabula.js?_cachebuster=201510300905"></script> <!-- actually starts Tabula -->
 
   </body>
 </html>
diff --git a/webapp/static/js/library.js b/webapp/static/js/library.js
index 38c51d3c..de67ae69 100644
--- a/webapp/static/js/library.js
+++ b/webapp/static/js/library.js
@@ -77,7 +77,7 @@ Tabula.UploadedFile = Backbone.Model.extend({
 
 Tabula.UploadedFilesCollection = Backbone.Collection.extend({
     model: Tabula.UploadedFile,
-    url: function(){ return '/pdfs/workspace.json'+ '?' + Number(new Date()).toString() },
+    url: function(){ return 'pdfs/workspace.json'+ '?' + Number(new Date()).toString() },
     comparator: function(i){ return -i.get('time')},
     parse: function(items){
       _(items).each(function(i){
diff --git a/webapp/static/js/pdf_view.js b/webapp/static/js/pdf_view.js
index 6dff960c..2b9cdfa1 100644
--- a/webapp/static/js/pdf_view.js
+++ b/webapp/static/js/pdf_view.js
@@ -1,12 +1,13 @@
 Tabula = Tabula || {};
 
 var clip = null;
+var base_uri = $('base').attr("href");
 
-PDF_ID = window.location.pathname.split('/')[2];
+PDF_ID = window.location.pathname.replace(base_uri, '').split('/')[1];
 Tabula.LazyLoad = 10; // max number of pages around the cursor to show (2x Tabula.LazyLoad pages are shown)
 Tabula.HideOnLazyLoad = false; // ideally, set to true, but this requires differently positioned selections, see https://github.com/tabulapdf/tabula/issues/245#issuecomment-75182061
 
-ZeroClipboard.config( { swfPath: "/swf/ZeroClipboard.swf" } );
+ZeroClipboard.config( { swfPath: (base_uri || '/') + "swf/ZeroClipboard.swf" } );
 
 Tabula.entityMap = {
   '&': '&amp;',
@@ -35,7 +36,7 @@ Tabula.Page = Backbone.Model.extend({
   },
   imageUrl: function(){
     var resolution = Math.max(Tabula.pdf_view.pdf_document.get('thumbnail_sizes')) || 560;
-    this.set('image_url', '/pdfs/' + PDF_ID + '/document_'+resolution+'_' + this.get('number') + '.png');
+    this.set('image_url', (base_uri || '/') + 'pdfs/' + PDF_ID + '/document_'+resolution+'_' + this.get('number') + '.png');
     return this.get('image_url');
   }
 });
@@ -45,7 +46,7 @@ Tabula.Pages = Backbone.Collection.extend({
   url: null, //set on initialize
   comparator: 'number',
   initialize: function(){
-    this.url = '/pdfs/' + PDF_ID + '/pages.json?_=' + Math.round(+new Date()).toString();
+    this.url = (base_uri || '/') + 'pdfs/' + PDF_ID + '/pages.json?_=' + Math.round(+new Date()).toString();
   }
 });
 
@@ -59,7 +60,7 @@ Tabula.Document = Backbone.Model.extend({
     this.page_collection = new Tabula.Pages([], {pdf_document: this});
     this.selections = new Tabula.Selections([], {pdf_document: this});
     this.autodetected_selections = new Tabula.AutodetectedSelections([], {pdf_document: this});
-    this.url = '/pdf/' + this.pdf_id + '/metadata.json';
+    this.url = (base_uri || '/') + 'pdf/' + this.pdf_id + '/metadata.json';
 
     this.set('original_filename', '');
     this.set('new_filename', false);
@@ -188,7 +189,7 @@ Tabula.Selections = Backbone.Collection.extend({
 Tabula.AutodetectedSelections = Tabula.Selections.extend({
   url: null, //set on init
   initialize: function(){
-    this.url = '/pdfs/' + PDF_ID + '/tables.json?_=' + Math.round(+new Date()).toString();
+    this.url = (base_uri || '/') + 'pdfs/' + PDF_ID + '/tables.json?_=' + Math.round(+new Date()).toString();
     _.bindAll(this, 'updateOrCreateByVendorSelectorId');
   },
 
@@ -305,7 +306,7 @@ Tabula.Query = Backbone.Model.extend({
     window.tabula_router.navigate('pdf/' + PDF_ID + '/extract'); // TODO: this should probably go in a view!! -JBM
     $.ajax({
         type: 'POST',
-        url: '/pdf/' + PDF_ID + '/data',
+        url: (base_uri || '/') + 'pdf/' + PDF_ID + '/data',
         data: this.query_data,
         success: _.bind(function(resp) {
           this.set('data', resp);
@@ -1213,7 +1214,7 @@ Tabula.PDFView = Backbone.View.extend(
     },
 
     removePage: function(removedPageModel){
-      $.post('/pdf/' + PDF_ID + '/page/' + removedPageModel.get('number'),
+      $.post((base_uri || '/') + 'pdf/' + PDF_ID + '/page/' + removedPageModel.get('number'),
            { _method: 'delete' },
            function () {
                Tabula.pdf_view.pageCount -= 1;
diff --git a/webapp/static/js/tabula.js b/webapp/static/js/tabula.js
index 9dd74a48..ece4b5f7 100644
--- a/webapp/static/js/tabula.js
+++ b/webapp/static/js/tabula.js
@@ -1,6 +1,7 @@
 var Tabula;
 window.Tabula = Tabula || {};
 $.ajaxSetup({ cache: false }); // fixes a dumb issue where Internet Explorer caches Ajax requests. See https://github.com/tabulapdf/tabula/issues/408
+var base_uri = $('base').attr("href");
 
 Tabula.UI_VERSION = "1.1.1-2017-02-11" // when we make releases, we should remember to up this.
 // Add '-pre' to the end of this for a prerelease version; this will let
@@ -10,6 +11,7 @@ Tabula.UI_VERSION = "1.1.1-2017-02-11" // when we make releases, we should remem
 // which is what we check against GitHub. In the future, this will allow us
 // to modularize the UI from the backend some more.
 
+
 var TabulaRouter = Backbone.Router.extend({
   routes: {
     "":                            "upload",
@@ -41,7 +43,7 @@ var TabulaRouter = Backbone.Router.extend({
     document.title="Import | Tabula";
     $('nav li a').removeClass('active'); $('nav #upload-nav').addClass('active');
     $.ajax({
-      url: "/js/library.js",
+      url: (base_uri || '/') + "js/library.js",
       dataType: "script",
       async: true,
       success: function(data, status, jqxhr){
@@ -60,7 +62,7 @@ var TabulaRouter = Backbone.Router.extend({
     $('#tabula-app').html( _.template( $('#pdf-view-template').html().replace(/nestedscript/g, 'script') )({}) );
 
     $.ajax({
-      url: "/js/pdf_view.js",
+      url: (base_uri || '/') + "js/pdf_view.js",
       dataType: "script",
       async: true,
       success: function(data, status, jqxhr){
@@ -78,7 +80,7 @@ var TabulaRouter = Backbone.Router.extend({
 Tabula.getVersion = function(){
   Tabula.notification = new Backbone.Model({});
   Tabula.new_version = new Backbone.Model({});
-  $.getJSON("/version", function(data){
+  $.getJSON((base_uri || '/') + "version", function(data){
     Tabula.api_version = data["api"];
     Tabula.getNotifications();
 
@@ -169,5 +171,8 @@ Tabula.getNotifications = function(){
 $(function(){
   Tabula.getVersion();
   window.tabula_router = new TabulaRouter();
-  Backbone.history.start({pushState: true});
+  Backbone.history.start({
+    pushState: true,
+    root: base_uri
+  });
 });
diff --git a/webapp/tabula_web.rb b/webapp/tabula_web.rb
index 32206e5a..94efda08 100644
--- a/webapp/tabula_web.rb
+++ b/webapp/tabula_web.rb
@@ -93,7 +93,6 @@ def upload(file)
 end
 
 Cuba.define do
-
   if TabulaSettings::ENABLE_DEBUG_METHODS
     require_relative './tabula_debug.rb'
     on 'debug' do
@@ -168,7 +167,11 @@ def upload(file)
 
     [root, "about", "pdf/:file_id", "help"].each do |paths_to_single_page_app|
       on paths_to_single_page_app do
-        res.write File.read("webapp/index.html")
+        index = File.read("webapp/index.html")
+        if ROOT_URI != ''
+          index.sub!("<base href=\"/\">", "<base href=\"#{ROOT_URI}\">")
+        end
+        res.write index
       end
     end