Added handling for missing flask-wtf dependency

Added CSRF protection (via flask-wtf)
Moved upload function to js file
Fixed error page in case of csrf failure

cps.py

@@ -49,7 +49,7 @@ try:
     from cps.kobo import kobo, get_kobo_activated
     from cps.kobo_auth import kobo_auth
     kobo_available = get_kobo_activated()
-except ImportError:
+except (ImportError, AttributeError):   # Catch also error for not installed flask-wtf (missing csrf decorator)
     kobo_available = False
 
 try:

cps/__init__.py

@@ -43,6 +43,12 @@ try:
 except ImportError:
     lxml_present = False
 
+try:
+    from flask_wtf.csrf import CSRFProtect
+    wtf_present = True
+except ImportError:
+    wtf_present = False
+
 mimetypes.init()
 mimetypes.add_type('application/xhtml+xml', '.xhtml')
 mimetypes.add_type('application/epub+zip', '.epub')
@@ -75,6 +81,12 @@ lm.login_view = 'web.login'
 lm.anonymous_user = ub.Anonymous
 lm.session_protection = 'strong'
 
+if wtf_present:
+    csrf = CSRFProtect()
+    csrf.init_app(app)
+else:
+    csrf = None
+
 ub.init_db(cli.settingspath)
 # pylint: disable=no-member
 config = config_sql.load_configuration(ub.session)
@@ -105,6 +117,11 @@ def create_app():
         log.info('*** "lxml" is needed for calibre-web to run. Please install it using pip: "pip install lxml" ***')
         print('*** "lxml" is needed for calibre-web to run. Please install it using pip: "pip install lxml" ***')
         sys.exit(6)
+    if not wtf_present:
+        log.info('*** "flask-wtf" is needed for calibre-web to run. Please install it using pip: "pip install flask-wtf" ***')
+        print('*** "flask-wtf" is needed for calibre-web to run. Please install it using pip: "pip install flask-wtf" ***')
+        sys.exit(7)
+
     app.wsgi_app = ReverseProxied(app.wsgi_app)
     # For python2 convert path to unicode
     if sys.version_info < (3, 0):

cps/about.py

@@ -29,6 +29,10 @@ from collections import OrderedDict
 import babel, pytz, requests, sqlalchemy
 import werkzeug, flask, flask_login, flask_principal, jinja2
 from flask_babel import gettext as _
+try:
+    from flask_wtf import __version__ as flaskwtf_version
+except ImportError:
+    flaskwtf_version = _(u'not installed')
 
 from . import db, calibre_db, converter, uploader, server, isoLanguages, constants
 from .render_template import render_title_template
@@ -75,6 +79,7 @@ _VERSIONS = OrderedDict(
     Flask=flask.__version__,
     Flask_Login=flask_loginVersion,
     Flask_Principal=flask_principal.__version__,
+    Flask_WTF=flaskwtf_version,
     Werkzeug=werkzeug.__version__,
     Babel=babel.__version__,
     Jinja2=jinja2.__version__,

cps/kobo.py

@@ -47,7 +47,8 @@ from sqlalchemy.exc import StatementError
 from sqlalchemy.sql import select
 import requests
 
-from . import config, logger, kobo_auth, db, calibre_db, helper, shelf as shelf_lib, ub
+
+from . import config, logger, kobo_auth, db, calibre_db, helper, shelf as shelf_lib, ub, csrf
 from .constants import sqlalchemy_version2
 from .helper import get_download_link
 from .services import SyncToken as SyncToken
@@ -505,7 +506,7 @@ def get_metadata(book):
 
     return metadata
 
-
+@csrf.exempt
 @kobo.route("/v1/library/tags", methods=["POST", "DELETE"])
 @requires_kobo_auth
 # Creates a Shelf with the given items, and returns the shelf's uuid.
@@ -595,6 +596,7 @@ def add_items_to_shelf(items, shelf):
     return items_unknown_to_calibre
 
 
+@csrf.exempt
 @kobo.route("/v1/library/tags/<tag_id>/items", methods=["POST"])
 @requires_kobo_auth
 def HandleTagAddItem(tag_id):
@@ -624,6 +626,7 @@ def HandleTagAddItem(tag_id):
     return make_response('', 201)
 
 
+@csrf.exempt
 @kobo.route("/v1/library/tags/<tag_id>/items/delete", methods=["POST"])
 @requires_kobo_auth
 def HandleTagRemoveItem(tag_id):
@@ -983,6 +986,7 @@ def HandleUnimplementedRequest(dummy=None):
 
 
 # TODO: Implement the following routes
+@csrf.exempt
 @kobo.route("/v1/user/loyalty/<dummy>", methods=["GET", "POST"])
 @kobo.route("/v1/user/profile", methods=["GET", "POST"])
 @kobo.route("/v1/user/wishlist", methods=["GET", "POST"])
@@ -993,6 +997,7 @@ def HandleUserRequest(dummy=None):
     return redirect_or_proxy_request()
 
 
+@csrf.exempt
 @kobo.route("/v1/products/<dummy>/prices", methods=["GET", "POST"])
 @kobo.route("/v1/products/<dummy>/recommendations", methods=["GET", "POST"])
 @kobo.route("/v1/products/<dummy>/nextread", methods=["GET", "POST"])
@@ -1026,6 +1031,7 @@ def make_calibre_web_auth_response():
     )
 
 
+@csrf.exempt
 @kobo.route("/v1/auth/device", methods=["POST"])
 @requires_kobo_auth
 def HandleAuthRequest():

cps/static/js/edit_books.js

@@ -23,7 +23,6 @@ if ($(".tiny_editor").length) {
 
 $(".datepicker").datepicker({
     format: "yyyy-mm-dd",
-    language: language
 }).on("change", function () {
     // Show localized date over top of the standard YYYY-MM-DD date
     var pubDate;

cps/static/js/main.js

@@ -112,6 +112,14 @@ $("#btn-upload").change(function() {
     $("#form-upload").submit();
 });
 
+$("#form-upload").uploadprogress({
+    redirect_url: getPath() + "/", //"{{ url_for('web.index')}}",
+    uploadedMsg: $("#form-upload").data("message"), //"{{_('Upload done, processing, please wait...')}}",
+    modalTitle: $("#form-upload").data("title"), //"{{_('Uploading...')}}",
+    modalFooter: $("#form-upload").data("footer"), //"{{_('Close')}}",
+    modalTitleFailed: $("#form-upload").data("failed") //"{{_('Error')}}"
+});
+
 $(document).ready(function() {
   var inp = $('#query').first()
   if (inp.length) {
@@ -223,6 +231,16 @@ $(function() {
     var preFilters = $.Callbacks();
     $.ajaxPrefilter(preFilters.fire);
 
+    // equip all post requests with csrf_token
+    var csrftoken = $("input[name='csrf_token']").val();
+    $.ajaxSetup({
+        beforeSend: function(xhr, settings) {
+            if (!/^(GET|HEAD|OPTIONS|TRACE)$/i.test(settings.type) && !this.crossDomain) {
+                xhr.setRequestHeader("X-CSRFToken", csrftoken)
+            }
+        }
+    });
+
     function restartTimer() {
         $("#spinner").addClass("hidden");
         $("#RestartDialog").modal("hide");
@@ -576,7 +594,7 @@ $(function() {
             method:"post",
             dataType: "json",
             url: window.location.pathname + "/../../ajax/simulatedbchange",
-            data: {config_calibre_dir: $("#config_calibre_dir").val()},
+            data: {config_calibre_dir: $("#config_calibre_dir").val(), csrf_token: $("input[name='csrf_token']").val()},
             success: function success(data) {
                 if ( data.change ) {
                     if ( data.valid ) {
@@ -712,7 +730,7 @@ $(function() {
             method:"post",
             contentType: "application/json; charset=utf-8",
             dataType: "json",
-            url: window.location.pathname + "/../ajax/view",
+            url: getPath() + "/ajax/view",
             data: "{\"series\": {\"series_view\": \""+ view +"\"}}",
             success: function success() {
                 location.reload();

cps/templates/book_edit.html

@@ -23,6 +23,7 @@
 {%  if source_formats|length > 0 and conversion_formats|length > 0 %}
   <div class="text-center more-stuff"><h4>{{_('Convert book format:')}}</h4>
       <form class="padded-bottom" action="{{ url_for('editbook.convert_bookformat', book_id=book.id) }}" method="post" id="book_convert_frm">
+          <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
           <div class="form-group">
               <div class="text-left">
                   <label class="control-label" for="book_format_from">{{_('Convert from:')}}</label>

cps/templates/book_table.html

@@ -20,6 +20,7 @@
 {% endblock %}
 {% block body %}
 <h2 class="{{page}}">{{_(title)}}</h2>
+      <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
       <div class="col-xs-12 col-sm-6">
         <div class="row form-group">
           <div class="btn btn-default disabled" id="merge_books" aria-disabled="true">{{_('Merge selected books')}}</div>

cps/templates/config_db.html

@@ -8,6 +8,7 @@
 <div class="discover">
   <h2>{{title}}</h2>
   <form role="form" method="POST" class="col-md-10 col-lg-6" action="{{ url_for('admin.db_configuration') }}" autocomplete="off">
+       <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
        <label for="config_calibre_dir">{{_('Location of Calibre Database')}}</label>
        <div class="form-group required input-group">
         <input type="text" class="form-control" id="config_calibre_dir" name="config_calibre_dir" value="{% if config.config_calibre_dir != None %}{{ config.config_calibre_dir }}{% endif %}" autocomplete="off">

cps/templates/config_edit.html

@@ -8,6 +8,7 @@
 <div class="discover">
   <h2>{{title}}</h2>
 <form role="form" method="POST" autocomplete="off">
+<input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
 <div class="panel-group col-md-10 col-lg-8">
   <div class="panel panel-default">
     <div class="panel-heading">

cps/templates/config_view_edit.html

@@ -7,7 +7,8 @@
 <div class="discover">
   <h2>{{title}}</h2>
 <form role="form" method="POST" autocomplete="off" >
-<div class="panel-group class="col-md-10 col-lg-6">
+<input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+<div class="panel-group" class="col-md-10 col-lg-6">
   <div class="panel panel-default">
     <div class="panel-heading">
       <h4 class="panel-title">

cps/templates/detail.html

@@ -214,6 +214,7 @@
         <div class="custom_columns">
           <p>
           <form id="have_read_form" action="{{ url_for('web.toggle_read', book_id=entry.id)}}" method="POST">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
             <label class="block-label">
               <input id="have_read_cb" data-checked="{{_('Mark As Unread')}}" data-unchecked="{{_('Mark As Read')}}" type="checkbox" {% if have_read %}checked{% endif %} >
               <span>{{_('Read')}}</span>
@@ -223,6 +224,7 @@
           {% if g.user.check_visibility(32768) %}
           <p>
             <form id="archived_form" action="{{ url_for('web.toggle_archived', book_id=entry.id)}}" method="POST">
+              <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
               <label class="block-label">
                 <input id="archived_cb" data-checked="{{_('Restore from archive')}}" data-unchecked="{{_('Add to archive')}}" type="checkbox" {% if is_archived %}checked{% endif %} >
                 <span>{{_('Archived')}}</span>

cps/templates/email_edit.html

@@ -7,6 +7,7 @@
 <div class="discover">
   <h1>{{title}}</h1>
   <form role="form" class="col-md-10 col-lg-6" method="POST">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     {% if feature_support['gmail'] %}
     <div class="form-group">
       <label for="config_email_type">{{_('Choose Server Type')}}</label>
@@ -72,6 +73,7 @@
   <div class="col-md-10 col-lg-6">
     <h2>{{_('Allowed Domains (Whitelist)')}}</h2>
     <form id="domain_add_allow" action="{{ url_for('admin.add_domain',allow=1)}}" method="POST">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="form-group required">
       <label for="domainname_allow">{{_('Add Domain')}}</label>
       <input type="text" class="form-control" name="domainname" id="domainname_allow" >
@@ -98,6 +100,7 @@
       </thead>
     </table>
     <form id="domain_add_deny" action="{{ url_for('admin.add_domain',allow=0)}}" method="POST">
+      <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
       <div class="form-group required">
         <label for="domainname_deny">{{_('Add Domain')}}</label>
         <input type="text" class="form-control" name="domainname" id="domainname_deny" >

cps/templates/http_error.html

@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html class="http-error" lang="{{ g.user.locale }}">
+<html class="http-error">
   <head>
     <title>{{ instance }} | HTTP Error ({{ error_code }})</title>
     <meta charset="utf-8">

cps/templates/layout.html

@@ -61,7 +61,7 @@
               {% if g.user.role_upload() or g.user.role_admin()%}
                 {% if g.allow_upload %}
                   <li>
-                    <form id="form-upload" class="navbar-form" action="{{ url_for('editbook.upload') }}" method="post" enctype="multipart/form-data">
+                    <form id="form-upload" class="navbar-form" action="{{ url_for('editbook.upload') }}" data-title="{{_('Uploading...')}}" data-footer="{{_('Close')}}" data-failed="{{_('Error')}}" data-message="{{_('Upload done, processing, please wait...')}}" method="post" enctype="multipart/form-data">
                       <div class="form-group">
                         <span class="btn btn-default btn-file">{{_('Upload')}}<input id="btn-upload" name="btn-upload"
                         type="file" accept="{% for format in accept %}.{% if format != ''%}{{format}}{% else %}*{% endif %}{{ ',' if not loop.last }}{% endfor %}" multiple></span>
@@ -200,17 +200,6 @@
     <script src="{{ url_for('static', filename='js/libs/plugins.js') }}"></script>
     <script src="{{ url_for('static', filename='js/libs/jquery.form.min.js') }}"></script>
     <script src="{{ url_for('static', filename='js/uploadprogress.js') }}"> </script>
-    <script type="text/javascript">
-        $(function() {
-            $("#form-upload").uploadprogress({
-              redirect_url: "{{ url_for('web.index')}}",
-              uploadedMsg: "{{_('Upload done, processing, please wait...')}}",
-              modalTitle: "{{_('Uploading...')}}",
-              modalFooter: "{{_('Close')}}",
-              modalTitleFailed: "{{_('Error')}}"
-            });
-        });
-    </script>
     <script src="{{ url_for('static', filename='js/main.js') }}"></script>
     {% if g.current_theme == 1 %}
       <script src="{{ url_for('static', filename='js/libs/jquery.visible.min.js') }}"></script>

cps/templates/list.html

@@ -20,6 +20,7 @@
       </div>
 
       {% if data == "series" %}
+      <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
       <button class="update-view btn btn-primary" data-target="series_view" id="grid-button" data-view="grid">Grid</button>
       {% endif %}
     </div>

cps/templates/login.html

@@ -4,6 +4,7 @@
   <h2 style="margin-top: 0">{{_('Login')}}</h2>
   <form method="POST" role="form">
     <input type="hidden" name="next" value="{{next_url}}">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="form-group">
       <label for="username">{{_('Username')}}</label>
       <input type="text" class="form-control" id="username" name="username" placeholder="{{_('Username')}}">

cps/templates/register.html

@@ -3,6 +3,7 @@
 <div class="well col-sm-6 col-sm-offset-2">
   <h2 style="margin-top: 0">{{_('Register New Account')}}</h2>
   <form method="POST" role="form">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     {% if not config.config_register_email %}
     <div class="form-group required">
       <label for="name">{{_('Username')}}</label>

cps/templates/search_form.html

@@ -3,6 +3,7 @@
 <h1 class="{{page}}">{{title}}</h1>
 <div class="col-md-10 col-lg-6">
   <form role="form" id="search" action="{{ url_for('web.advanced_search_form') }}" method="POST">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="form-group">
       <label for="book_title">{{_('Book Title')}}</label>
       <input type="text" class="form-control" name="book_title" id="book_title" value="">

cps/templates/shelf_edit.html

@@ -3,6 +3,7 @@
 <div class="discover">
   <h1>{{title}}</h1>
   <form role="form" method="POST">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="form-group">
       <label for="title">{{_('Title')}}</label>
       <input type="text" class="form-control" name="title" id="title" value="{{ shelf.name if shelf.name != None }}">

cps/templates/user_edit.html

@@ -3,6 +3,7 @@
 <div class="discover">
   <h1>{{title}}</h1>
   <form role="form" method="POST" autocomplete="off">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="col-md-10 col-lg-8">
     {% if new_user or ( g.user and content.name != "Guest" and g.user.role_admin() ) %}
     <div class="form-group required">

cps/templates/user_table.html

@@ -118,6 +118,7 @@
 {% endblock %}
 {% block body %}
 <h2 class="{{page}}">{{_(title)}}</h2>
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <div class="col-xs-12 col-sm-12">
         <div class="row">
           <div class="btn btn-default disabled" id="user_delete_selection" aria-disabled="true">{{_('Remove Selections')}}</div>

cps/web.py

@@ -84,14 +84,13 @@ except ImportError:
 
 @app.after_request
 def add_security_headers(resp):
-    resp.headers['Content-Security-Policy'] = "default-src 'self' 'unsafe-inline' 'unsafe-eval';"
+    resp.headers['Content-Security-Policy'] = "default-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data:"
     if request.endpoint == "editbook.edit_book":
-        resp.headers['Content-Security-Policy'] += "img-src * data:"
+        resp.headers['Content-Security-Policy'] += " *"
     resp.headers['X-Content-Type-Options'] = 'nosniff'
     resp.headers['X-Frame-Options'] = 'SAMEORIGIN'
     resp.headers['X-XSS-Protection'] = '1; mode=block'
     resp.headers['Strict-Transport-Security'] = 'max-age=31536000; includeSubDomains'
-    # log.debug(request.full_path)
     return resp
 
 web = Blueprint('web', __name__)

requirements.txt

@@ -13,3 +13,4 @@ tornado>=4.1,<6.2
 Wand>=0.4.4,<0.7.0
 unidecode>=0.04.19,<1.3.0
 lxml>=3.8.0,<4.7.0
+flask-wtf>=0.15.0,<0.16.0

setup.cfg

@@ -18,9 +18,11 @@ classifiers =
     Development Status :: 5 - Production/Stable
     License :: OSI Approved :: GNU Affero General Public License v3
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
     Operating System :: OS Independent
 keywords =
   calibre
@@ -49,6 +51,7 @@ install_requires =
     Wand>=0.4.4,<0.7.0
     unidecode>=0.04.19,<1.3.0
     lxml>=3.8.0,<4.7.0
+    flask-wtf>=0.15.0,<0.16.0
 
 [options.extras_require]
 gdrive =