Fix quoting of purl with qualifiers

vulnerabilities/api.py

@@ -8,6 +8,7 @@
 #
 
 from urllib.parse import unquote
+from urllib.parse import quote
 
 from django.db.models import Prefetch
 from django_filters import rest_framework as filters
@@ -67,6 +68,8 @@ def get_resource_url(self, instance):
             resource_url = serializers.SerializerMethodField()
         """
         resource_url = instance.get_absolute_url()
+        if isinstance(instance, Package):
+            resource_url = instance.get_absolute_url(quote_purl=True)
 
         if request := self.context.get("request", None):
             return request.build_absolute_uri(location=resource_url)

vulnerabilities/models.py

@@ -10,6 +10,7 @@
 import hashlib
 import json
 import logging
+from urllib.parse import quote
 from contextlib import suppress
 from typing import Any
 
@@ -639,11 +640,14 @@ def is_vulnerable(self) -> bool:
     def history(self):
         return self.changelog.all()
 
-    def get_absolute_url(self):
+    def get_absolute_url(self, quote_purl=False):
         """
         Return this Package details URL.
         """
-        return reverse("package_details", args=[self.purl])
+        purl = self.purl
+        if quote_purl:
+            purl = quote(purl)
+        return reverse("package_details", args=[purl])
 
     def get_details_url(self, request):
         """