From a610fa024fd977d96c09bd34dc02520ae3c9a6d5 Mon Sep 17 00:00:00 2001
From: koudle <rxs086@gmail.com>
Date: Fri, 30 Nov 2018 01:31:57 +0800
Subject: [PATCH] fix crash when could not find package

---
 example/src/examples/cow_repository.dart      |  9 ++++++---
 .../src/examples/http_proxy_repository.dart   | 20 +++++++++++--------
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/example/src/examples/cow_repository.dart b/example/src/examples/cow_repository.dart
index 4d86b5b..9e559ed 100644
--- a/example/src/examples/cow_repository.dart
+++ b/example/src/examples/cow_repository.dart
@@ -132,9 +132,12 @@ class _RemoteMetadataCache {
           var c = new Completer<Set<PackageVersion>>();
 
           _versions.putIfAbsent(package, () => new Set());
-          remote.versions(package).toList().then((versions) {
-            _versions[package].addAll(versions);
-            c.complete(_versions[package]);
+          remote.versions(package)
+            .where((v) => v != null)
+            .toList()
+            .then((versions) {
+              _versions[package].addAll(versions);
+              c.complete(_versions[package]);
           });
 
           return c;
diff --git a/example/src/examples/http_proxy_repository.dart b/example/src/examples/http_proxy_repository.dart
index 844e273..cd00c18 100644
--- a/example/src/examples/http_proxy_repository.dart
+++ b/example/src/examples/http_proxy_repository.dart
@@ -27,15 +27,19 @@ class HttpProxyRepository extends PackageRepository {
         baseUrl.resolve('/api/packages/${Uri.encodeComponent(package)}');
 
     http.Response response = await client.get(versionUrl);
-    var json = convert.json.decode(response.body);
-    var versions = json['versions'] as List<dynamic>;
-    if (versions != null) {
-      for (var item in versions) {
-        var pubspec = item['pubspec'];
-        var pubspecString = convert.json.encode(pubspec);
-        yield new PackageVersion(pubspec['name'] as String,
-            pubspec['version'] as String, pubspecString);
+    if(response.statusCode == 200) {
+      var json = convert.json.decode(response.body);
+      var versions = json['versions'] as List<dynamic>;
+      if (versions != null) {
+        for (var item in versions) {
+          var pubspec = item['pubspec'];
+          var pubspecString = convert.json.encode(pubspec);
+          yield new PackageVersion(pubspec['name'] as String,
+              pubspec['version'] as String, pubspecString);
+        }
       }
+    }else{
+      yield null;
     }
   }