Better handling of HttpClientRequest

assets/release_notes.md

@@ -5,6 +5,7 @@
 ---
 
 - Fixes certificate issues connecting to HTTPs server
+- Fixes some app crash bugs
 - Bug fixes for various API calls
 - UI cleanup
 

lib/api.dart

@@ -209,9 +209,6 @@ class InvenTreeAPI {
       return false;
     }
 
-
-    print("Response from server: ${response}");
-
     // We expect certain response from the server
     if (!response.containsKey("server") || !response.containsKey("version") || !response.containsKey("instance")) {
 
@@ -395,7 +392,37 @@ class InvenTreeAPI {
 
     var client = createClient(true);
 
-    HttpClientRequest request = await client.patchUrl(Uri.parse(_url));
+    // Open a connection to the server
+    HttpClientRequest request = await client.patchUrl(Uri.parse(_url))
+    .timeout(Duration(seconds: 10))
+    .catchError((error) {
+      print("PATCH request return error");
+      print("URL: ${_url}");
+      print("Error: ${error.toString()}");
+
+      var ctx = OneContext().context;
+
+      if (error is SocketException) {
+        showServerError(
+          I18N.of(ctx).connectionRefused,
+          error.toString(),
+        );
+      } else if (error is TimeoutException) {
+        showTimeoutError(ctx);
+      } else {
+        showServerError(
+          I18N.of(ctx).serverError,
+          error.toString()
+        );
+      }
+
+      return null;
+    });
+
+    // Request could not be made
+    if (request = null) {
+      return null;
+    }
 
     var data = json.encode(body);
 
@@ -485,7 +512,36 @@ class InvenTreeAPI {
 
     var client = createClient(true);
 
-    HttpClientRequest request = await client.postUrl(Uri.parse(_url));
+    // Open a connection to the server
+    HttpClientRequest request = await client.postUrl(Uri.parse(_url))
+    .timeout(Duration(seconds: 10))
+    .catchError((error) {
+      print("POST request returned error");
+      print("URL: ${_url}");
+      print("Error: ${error.toString()}");
+
+      var ctx = OneContext().context;
+
+      if (error is SocketException) {
+        showServerError(
+          I18N.of(ctx).connectionRefused,
+          error.toString()
+        );
+      } else if (error is TimeoutException) {
+        showTimeoutError(ctx);
+      } else {
+        showServerError(
+        I18N.of(ctx).serverError,
+        error.toString()
+        );
+      }
+
+      return null;
+    });
+
+    if (request == null) {
+      return null;
+    }
 
     var data = json.encode(body);
 
@@ -607,18 +663,11 @@ class InvenTreeAPI {
       _url = _url.substring(0, _url.length - 1);
     }
 
-    print("GET: " + _url);
-
     var client = createClient(true);
 
-    HttpClientRequest request = await client.getUrl(Uri.parse(_url));
-
-    // Set headers
-    request.headers.set(HttpHeaders.contentTypeHeader, 'application/json');
-    request.headers.set(HttpHeaders.authorizationHeader, _authorizationHeader());
-
-    HttpClientResponse response = await request.close()
-    .timeout(Duration(seconds: 30))
+    // Open a connection
+    HttpClientRequest request = await client.getUrl(Uri.parse(_url))
+    .timeout(Duration(seconds: 10))
         .catchError((error) {
       print("GET request returned error");
       print("URL: ${_url}");
@@ -643,6 +692,44 @@ class InvenTreeAPI {
       return null;
     });
 
+    if (request == null) {
+      return null;
+    }
+
+    // Set connection headers
+    request.headers.set(HttpHeaders.contentTypeHeader, 'application/json');
+    request.headers.set(HttpHeaders.authorizationHeader, _authorizationHeader());
+
+    print("Attempting connection");
+
+    HttpClientResponse response = await request.close()
+    .timeout(Duration(seconds: 10))
+    .catchError((error) {
+      print("GET request returned error");
+      print("URL: ${_url}");
+      print("Error: ${error.toString()}");
+
+      var ctx = OneContext().context;
+
+      if (error is SocketException) {
+        showServerError(
+            I18N.of(ctx).connectionRefused,
+            error.toString()
+        );
+      } else if (error is TimeoutException) {
+        showTimeoutError(ctx);
+      } else {
+        showServerError(
+            I18N.of(ctx).serverError,
+            error.toString()
+        );
+      }
+
+      return null;
+    });
+
+    print("got here");
+
     // A null response means something has gone wrong...
     if (response == null) {
       print("null response from GET ${_url}");

lib/widget/dialogs.dart

@@ -177,19 +177,24 @@ Future<void> showStatusCodeError(int status, {int expected = 200}) async {
 
 Future<void> showTimeoutError(BuildContext context) async {
 
-  await showServerError(I18N.of(context).timeout, I18N.of(context).noResponse);
+  // Use OneContext as "sometimes" context is null here?
+  var ctx = OneContext().context;
+
+  await showServerError(I18N.of(ctx).timeout, I18N.of(ctx).noResponse);
 }
 
 void showFormDialog(String title, {String acceptText, String cancelText, GlobalKey<FormState> key, List<Widget> fields, List<Widget> actions, Function callback}) {
 
   BuildContext dialogContext;
 
+  var ctx = OneContext().context;
+
   if (acceptText == null) {
-    acceptText = I18N.of(OneContext().context).save;
+    acceptText = I18N.of(ctx).save;
   }
 
   if (cancelText == null) {
-    cancelText = I18N.of(OneContext().context).cancel;
+    cancelText = I18N.of(ctx).cancel;
   }
 
   // Undefined actions = OK + Cancel

pubspec.yaml

@@ -7,7 +7,7 @@ description: InvenTree stock management
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 0.1.3+7
+version: 0.1.4+8
 
 environment:
   sdk: ">=2.1.0 <3.0.0"