From 11e2acac397404bb7c721cd8a0841475172ca5bf Mon Sep 17 00:00:00 2001
From: aniruth37 <aniruth37@gmail.com>
Date: Wed, 13 Dec 2023 12:17:31 +0530
Subject: [PATCH] Fix for isse #63 - Incorrect parsing of PURL with leading '/'
 in namespace

---
 src/package-url.js             |  4 ++--
 test/data/test-suite-data.json | 12 ++++++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/package-url.js b/src/package-url.js
index 93cc59f..cdcad64 100644
--- a/src/package-url.js
+++ b/src/package-url.js
@@ -149,7 +149,7 @@ class PackageURL {
 
     let type
     [type, remainder] = remainder.split('/', 2);
-    if (!type || !remainder) {
+    if (!type) {
       throw new Error('purl is missing the required "type" component.');
     }
     type = decodeURIComponent(type)
@@ -207,7 +207,7 @@ class PackageURL {
       let nameIndex = remaining.length - 1;
       let namespaceComponents = remaining.slice(0, nameIndex);
       name = decodeURIComponent(remaining[nameIndex]);
-      namespace = decodeURIComponent(namespaceComponents.join('/'));
+      namespace = decodeURIComponent(namespaceComponents.filter(item => item.trim()).join('/'));
     } else if (remaining.length === 1) {
       name = decodeURIComponent(remaining[0]);
     }
diff --git a/test/data/test-suite-data.json b/test/data/test-suite-data.json
index 6c89085..09b99ec 100644
--- a/test/data/test-suite-data.json
+++ b/test/data/test-suite-data.json
@@ -430,5 +430,17 @@
     "qualifiers": null,
     "subpath": null,
     "is_invalid": false
+  },
+  {
+    "description": "In namespace, leading and trailing slashes '/' are not significant and should be stripped in the canonical form",
+    "purl": "pkg:golang//github.com/ll/xlog@2.0",
+    "canonical_purl": "pkg:golang/github.com/ll/xlog@2.0",
+    "type": "golang",
+    "namespace": "github.com/ll",
+    "name": "xlog",
+    "version": "2.0",
+    "qualifiers": null,
+    "subpath": null,
+    "is_invalid": false
   }
 ]