Expect missing copyright field and ValueError errors

Expecting the errors enables to give better feedback to users
than just a 500 error

debsources/app/copyright/templates/copyright/404_missing_copyright.html → debsources/app/copyright/templates/copyright/missing_copyright.html

@@ -1,12 +1,12 @@
 {#
-  Copyright (C) 2015  The Debsources developers <info@sources.debian.net>.
+  Copyright (C) 2016  The Debsources developers <info@sources.debian.net>.
   See the AUTHORS file at the top-level directory of this distribution and at
   https://anonscm.debian.org/gitweb/?p=qa/debsources.git;a=blob;f=AUTHORS;hb=HEAD
   License: GNU Affero General Public License, version 3 or above.
 #}
 {% extends name+"/base.html" %}
 
-{% block title %}404{% endblock %}
+{% block title %}Error{% endblock %}
 {% block content %}
 <h2>{{ self.title() }}</h2>
 <p>The debian/copyright file has a file paragraph without the <b>required</b> copyright field. The files paragraph is:
@@ -15,7 +15,8 @@ <h2>{{ self.title() }}</h2>
 <li>{{ files }}</li>
 {% endfor %}
 </ul>
+<a href="{{ url_for('sources.source', path_to=(package +'/'+version+'/debian/copyright'))}}">View raw copyright file</a>
 </p> 
-<a href="/">Go home</a>
+<a href="{{ url_for('.license', path_to=(package +'/'+version))}}">Go back to the license page</a>
 
 {% endblock %}

debsources/app/copyright/templates/copyright/value_error.html

@@ -0,0 +1,20 @@
+{#
+  Copyright (C) 2016  The Debsources developers <info@sources.debian.net>.
+  See the AUTHORS file at the top-level directory of this distribution and at
+  https://anonscm.debian.org/gitweb/?p=qa/debsources.git;a=blob;f=AUTHORS;hb=HEAD
+  License: GNU Affero General Public License, version 3 or above.
+#}
+{% extends name+"/base.html" %}
+
+{% block title %}Error{% endblock %}
+{% block content %}
+<h2>{{ self.title() }}</h2>
+<p>Parsing the debian/copyright file yields a Value error. Causes of ValueError can be:
+<ul>
+    <li>continued line must begin with " "</li>
+    <li>missing value in one of the required attributes (Files, Copyright, License)</li>
+</ul>
+
+<p><a href="{{ url_for('sources.source', path_to=(package +'/'+version+'/debian/copyright'))}}">View raw copyright file</a></p>
+</p> 
+{% endblock %}

debsources/app/copyright/views.py

@@ -22,7 +22,8 @@
 import debsources.statistics as statistics
 from debsources.excepts import (Http404ErrorSuggestions, FileOrFolderNotFound,
                                 InvalidPackageOrVersionError,
-                                Http404MissingCopyright, Http404Error)
+                                Http404MissingCopyright, Http404Error,
+                                CopyrightValueError)
 from ..views import GeneralView, ChecksumView, session, app
 from ..sourcecode import SourceCodeIterator
 from ..pagination import Pagination
@@ -74,13 +75,16 @@ def get_objects(self, path_to):
                         code=sourcefile,
                         dump='True',
                         nlines=sourcefile.get_number_of_lines(),)
-        return dict(package=package,
-                    version=version,
-                    dump='False',
-                    header=helper.get_copyright_header(c),
-                    files=helper.parse_copyright_paragraphs_for_html_render(
-                        c, "/src/" + package + "/" + version + "/"),
-                    licenses=helper.parse_licenses_for_html_render(c))
+        try:
+            return dict(package=package,
+                        version=version,
+                        dump='False',
+                        header=helper.get_copyright_header(c),
+                        files=helper.parse_copyright_paragraphs_html_render(
+                            c, "/src/" + package + "/" + version + "/"),
+                        licenses=helper.parse_licenses_for_html_render(c))
+        except ValueError as e:
+            raise CopyrightValueError(package, version, e.message)
 
 
 class ChecksumLicenseView(ChecksumView):

debsources/app/patches/views.py

@@ -19,7 +19,7 @@
 from ..views import GeneralView, session
 from debsources.navigation import Location, SourceFile
 from debsources.excepts import (Http404ErrorSuggestions, FileOrFolderNotFound,
-                                InvalidPackageOrVersionError)
+                                InvalidPackageOrVersionError, Http404Error)
 from ..sourcecode import SourceCodeIterator
 from . import patches_helper as helper
 
@@ -172,6 +172,8 @@ class PatchView(GeneralView):
 
     def get_objects(self, path_to):
         path_dict = path_to.split('/')
+        if len(path_dict) < 3:
+            raise Http404Error()
         package = path_dict[0]
         version = path_dict[1]
         patch = '/'.join(path_dict[2:])

debsources/app/views.py

@@ -26,7 +26,7 @@
 from debsources.excepts import (
     Http500Error, Http404Error, Http404ErrorSuggestions, Http403Error,
     InvalidPackageOrVersionError, Http404MissingCopyright,
-    MissingCopyrightField)
+    MissingCopyrightField, CopyrightValueError)
 from debsources.models import Package, SuiteAlias
 import debsources.query as qry
 from debsources.sqla_session import _close_session
@@ -132,8 +132,15 @@ def error_404(self, error):
                     return render_template('copyright/404_missing.html',
                                            suggestions=suggestions), 404
             elif isinstance(error, MissingCopyrightField):
-                return render_template('copyright/404_missing_copyright.html',
-                                       paragraph=error.par)
+                return render_template('copyright/missing_copyright.html',
+                                       paragraph=error.par,
+                                       package=error.package,
+                                       version=error.version)
+            elif isinstance(error, CopyrightValueError):
+                return render_template('copyright/value_error.html',
+                                       error=error.error,
+                                       package=error.package,
+                                       version=error.version)
             else:
                 return render_template('404.html'), 404
 

debsources/excepts.py

@@ -54,3 +54,11 @@ def __init__(self, package, version, par):
         self.version = version
         self.par = par
         super(MissingCopyrightField, self).__init__()
+
+
+class CopyrightValueError(Http404Error):
+    def __init__(self, package, version, error):
+        self.package = package
+        self.version = version
+        self.error = error
+        super(CopyrightValueError, self).__init__()

debsources/license_helper.py

@@ -149,7 +149,7 @@ def get_copyright_header(copyright):
     return copyright.header._RestrictedWrapper__data
 
 
-def parse_copyright_paragraphs_for_html_render(copyright, base_url):
+def parse_copyright_paragraphs_html_render(copyright, base_url):
     """ Returns list of File objects. If `base_url` is provided
         then it creates links to base_url+glob
     """