fix fluttercommunity#69, upgrade Android dependencies, release v1.1.8

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 1.1.8 - 16.07.2019
+
+* Fix bug in iOS: from iOS 8, absolute path to app's sandbox changes every time you relaunch the app, hence `savedDir` path is needed to truncate the changing part before saving it to DB and recreate the absolute path every time it loaded from DB. Currently, the plugin only supports save files in `NSDocumentDirectory`.
+* Fix bug is iOS: setting wrong status of task in case that the application is terminated
+* Android: upgrade dependencies
+
 ## 1.1.7 - 24.03.2019
 
 * Android: upgrade `WorkManager` to version 2.0.0 (AndroidX)

README.md

@@ -1,4 +1,4 @@
-<img src="https://img.shields.io/badge/Flutter%20Community-flutter__downloader-blue.svg?style=for-the-badge&logo=data:image/png;base64,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" width="600">
+[![Flutter Community: flutter_downloader](https://fluttercommunity.dev/_github/header/flutter_downloader)](https://github.com/fluttercommunity/community)
 
 # Flutter Downloader
 
@@ -82,6 +82,8 @@ This plugin is based on [`WorkManager`][1] in Android and [`NSURLSessionDownload
 <string>All files have been downloaded</string>
 ````
 
+**Note:**
+ - This plugin only supports save files in `NSDocumentDirectory`
 
 
 ## Android integration

android/build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
+        classpath 'com.android.tools.build:gradle:3.4.2'
     }
 }
 
@@ -35,7 +35,7 @@ android {
 
 dependencies {
     implementation('androidx.work:work-runtime:2.1.0')
-    implementation 'androidx.annotation:annotation:1.0.2'
+    implementation 'androidx.annotation:annotation:1.1.0'
     implementation 'androidx.core:core:1.1.0-rc02'
     implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
 

example/ios/Podfile.lock

@@ -4,7 +4,7 @@ PODS:
     - Flutter
   - path_provider (0.0.1):
     - Flutter
-  - permission_handler (2.1.2):
+  - permission_handler (3.0.0):
     - Flutter
 
 DEPENDENCIES:
@@ -24,11 +24,11 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/permission_handler/ios"
 
 SPEC CHECKSUMS:
-  Flutter: 9d0fac939486c9aba2809b7982dfdbb47a7b0296
-  flutter_downloader: ff8f392c1b9d2a35f7c7578508e64504335fdab0
-  path_provider: 09407919825bfe3c2deae39453b7a5b44f467873
-  permission_handler: ccfc62fb39274a876cb21737e72a746f4c7efa94
+  Flutter: 58dd7d1b27887414a370fcccb9e645c08ffd7a6a
+  flutter_downloader: 058b9c41564a90500f67f3e432e3524613a7fd83
+  path_provider: f96fff6166a8867510d2c25fdcc346327cc4b259
+  permission_handler: 047f11d44db785922214783da5f7a3cc8874c843
 
 PODFILE CHECKSUM: 1b9df8d859f07d47cc6f43477c116e72a973c68f
 
-COCOAPODS: 1.5.3
+COCOAPODS: 1.7.0

example/ios/Runner.xcodeproj/project.pbxproj

@@ -8,7 +8,6 @@
 
 /* Begin PBXBuildFile section */
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
-		2D5378261FAA1A9400D5DBA9 /* flutter_assets in Resources */ = {isa = PBXBuildFile; fileRef = 2D5378251FAA1A9400D5DBA9 /* flutter_assets */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
 		3B80C3941E831B6300D905FE /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; };
 		3B80C3951E831B6300D905FE /* App.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
@@ -43,9 +42,10 @@
 /* Begin PBXFileReference section */
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
-		2D5378251FAA1A9400D5DBA9 /* flutter_assets */ = {isa = PBXFileReference; lastKnownFileType = folder; name = flutter_assets; path = Flutter/flutter_assets; sourceTree = SOURCE_ROOT; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
 		3B80C3931E831B6300D905FE /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/App.framework; sourceTree = "<group>"; };
+		5A9AECB944365DA89A4BC314 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		62052E9DF95B469031D71905 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
 		7AFFD8ED1D35381100E5BB4D /* AppDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
 		7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
@@ -80,7 +80,6 @@
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
-				2D5378251FAA1A9400D5DBA9 /* flutter_assets */,
 				3B80C3931E831B6300D905FE /* App.framework */,
 				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
 				9740EEBA1CF902C7004384FC /* Flutter.framework */,
@@ -137,6 +136,8 @@
 		B6C8F339E2DCD14BD62D3EE0 /* Pods */ = {
 			isa = PBXGroup;
 			children = (
+				62052E9DF95B469031D71905 /* Pods-Runner.debug.xcconfig */,
+				5A9AECB944365DA89A4BC314 /* Pods-Runner.release.xcconfig */,
 			);
 			name = Pods;
 			sourceTree = "<group>";
@@ -200,6 +201,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
@@ -223,7 +225,6 @@
 				3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,
 				9740EEB41CF90195004384FC /* Debug.xcconfig in Resources */,
 				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
-				2D5378261FAA1A9400D5DBA9 /* flutter_assets in Resources */,
 				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -255,7 +256,7 @@
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
 				"${PODS_ROOT}/../.symlinks/flutter/ios/Flutter.framework",
 				"${BUILT_PRODUCTS_DIR}/flutter_downloader/flutter_downloader.framework",
 				"${BUILT_PRODUCTS_DIR}/path_provider/path_provider.framework",
@@ -270,7 +271,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {

flutter_downloader.iml

@@ -17,6 +17,12 @@
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_downloader/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_downloader/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_downloader/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_downloader/example/ios/Flutter/App.framework/flutter_assets/packages" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_downloader/example/ios/Flutter/flutter_assets/packages" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/permission_handler/example/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/permission_handler/example/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/permission_handler/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/App.framework/flutter_assets/packages" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/flutter_assets/packages" />
     </content>
     <orderEntry type="sourceFolder" forTests="false" />

ios/Classes/FlutterDownloaderPlugin.m

@@ -235,13 +235,32 @@ - (NSURL*)fileUrlFromDict:(NSDictionary*)dict
     NSString *url = dict[KEY_URL];
     NSString *savedDir = dict[KEY_SAVED_DIR];
     NSString *filename = dict[KEY_FILE_NAME];
+    NSLog(@"savedDir: %@", savedDir);
+    NSLog(@"filename: %@", filename);
 //    if (filename == (NSString*) [NSNull null] || [NULL_VALUE isEqualToString: filename]) {
 //        filename = [NSURL URLWithString:url].lastPathComponent;
 //    }
     NSURL *savedDirURL = [NSURL fileURLWithPath:savedDir];
     return [savedDirURL URLByAppendingPathComponent:filename];
 }
 
+- (NSString*)absoluteSavedDirPath:(NSString*)savedDir {
+    return [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:savedDir];
+}
+
+- (NSString*)shortenSavedDirPath:(NSString*)absolutePath {
+    NSLog(@"Absolute savedDir path: %@", absolutePath);
+    if (absolutePath) {
+        NSString* documentDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
+        NSRange foundRank = [absolutePath rangeOfString:documentDirPath];
+        if (foundRank.length > 0) {
+            // we increase the location of range by one because we want to remove the file separator as well.
+            return [absolutePath substringWithRange:NSMakeRange(foundRank.length + 1, absolutePath.length - documentDirPath.length - 1)];
+        }
+    }
+    return absolutePath;
+}
+
 - (long)currentTimeInMilliseconds
 {
     return [[NSDate date] timeIntervalSince1970]*1000;
@@ -331,7 +350,9 @@ - (NSArray*)loadAllTasks
     NSLog(@"Load tasks successfully");
     NSMutableArray *results = [NSMutableArray new];
     for(NSArray *record in records) {
-        [results addObject:[self taskDictFromRecordArray:record]];
+        NSDictionary *task = [self taskDictFromRecordArray:record];
+        NSLog(@"%@", task);
+        [results addObject:task];
     }
     return results;
 }
@@ -359,7 +380,9 @@ - (NSDictionary*)loadTaskWithId:(NSString*)taskId
         if (records != nil && [records count] > 0) {
             NSArray *record = [records firstObject];
             NSDictionary *task = [self taskDictFromRecordArray:record];
-            [_runningTaskById setObject:[NSMutableDictionary dictionaryWithDictionary:task] forKey:taskId];
+            if ([task[KEY_STATUS] intValue] < STATUS_COMPLETE) {
+                [_runningTaskById setObject:[NSMutableDictionary dictionaryWithDictionary:task] forKey:taskId];
+            }
             return task;
         }
         return nil;
@@ -373,7 +396,7 @@ - (NSDictionary*) taskDictFromRecordArray:(NSArray*)record
     int progress = [[record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"progress"]] intValue];
     NSString *url = [record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"url"]];
     NSString *filename = [record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"file_name"]];
-    NSString *savedDir = [record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"saved_dir"]];
+    NSString *savedDir = [self absoluteSavedDirPath:[record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"saved_dir"]]];
     NSString *headers = [record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"headers"]];
     headers = [self escape:headers revert:true];
     int resumable = [[record objectAtIndex:[_dbManager.arrColumnNames indexOfObject:@"resumable"]] intValue];
@@ -388,11 +411,12 @@ - (NSDictionary*) taskDictFromRecordArray:(NSArray*)record
 - (void)enqueueMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     NSString *urlString = call.arguments[KEY_URL];
     NSString *savedDir = call.arguments[KEY_SAVED_DIR];
+    NSString *shortSavedDir = [self shortenSavedDirPath:savedDir];
     NSString *fileName = call.arguments[KEY_FILE_NAME];
     NSString *headers = call.arguments[KEY_HEADERS];
     NSNumber *showNotification = call.arguments[KEY_SHOW_NOTIFICATION];
     NSNumber *openFileFromNotification = call.arguments[KEY_OPEN_FILE_FROM_NOTIFICATION];
-
+    
     NSURLSessionDownloadTask *task = [self downloadTaskWithURL:[NSURL URLWithString:urlString] fileName:fileName andSavedDir:savedDir andHeaders:headers];
 
     NSString *taskId = [self identifierForTask:task];
@@ -419,7 +443,7 @@ - (void)enqueueMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result
 
     __typeof__(self) __weak weakSelf = self;
     dispatch_sync(databaseQueue, ^{
-        [weakSelf addNewTask:taskId url:urlString status:STATUS_ENQUEUED progress:0 filename:fileName savedDir:savedDir headers:headers resumable:NO showNotification: [showNotification boolValue] openFileFromNotification: [openFileFromNotification boolValue]];
+        [weakSelf addNewTask:taskId url:urlString status:STATUS_ENQUEUED progress:0 filename:fileName savedDir:shortSavedDir headers:headers resumable:NO showNotification: [showNotification boolValue] openFileFromNotification: [openFileFromNotification boolValue]];
     });
     result(taskId);
     [self sendUpdateProgressForTaskId:taskId inStatus:@(STATUS_ENQUEUED) andProgress:@0];
@@ -656,7 +680,9 @@ - (void)applicationWillTerminate:(nonnull UIApplication *)application
 {
     NSLog(@"applicationWillTerminate:");
     for (NSString* key in _runningTaskById) {
-        [self updateTask:key status:STATUS_CANCELED progress:-1];
+        if ([_runningTaskById[key][KEY_STATUS] intValue] < STATUS_COMPLETE) {
+            [self updateTask:key status:STATUS_CANCELED progress:-1];
+        }
     }
     _session = nil;
     _flutterChannel = nil;
@@ -687,7 +713,6 @@ - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTas
     NSString *taskId = [self identifierForTask:downloadTask ofSession:session];
     NSDictionary *task = [self loadTaskWithId:taskId];
     NSURL *destinationURL = [self fileUrlFromDict:task];
-
     [_runningTaskById removeObjectForKey:taskId];
 
     NSError *error;

lib/flutter_downloader.dart

@@ -15,6 +15,7 @@
 
 library flutter_downloader;
 
+import 'dart:io';
 import 'dart:async';
 import 'package:meta/meta.dart';
 import 'package:flutter/services.dart';
@@ -27,8 +28,7 @@ import 'package:flutter/services.dart';
 /// * `progress`: current progress value of a download task, the value is in
 /// range of 0 and 100
 ///
-typedef void DownloadCallback(
-    String id, DownloadTaskStatus status, int progress);
+typedef void DownloadCallback(String id, DownloadTaskStatus status, int progress);
 
 ///
 /// A class defines a set of possible statuses of a download task
@@ -127,6 +127,9 @@ class FlutterDownloader {
       bool showNotification = true,
       bool openFileFromNotification = true,
       bool requiresStorageNotLow = true}) async {
+
+    assert(Directory(savedDir).existsSync());
+
     StringBuffer headerBuilder = StringBuffer();
     if (headers != null) {
       headerBuilder.write('{');
@@ -329,8 +332,7 @@ class FlutterDownloader {
   /// * `shouldDeleteContent`: if the task is completed, set `true` to let the
   /// plugin remove the downloaded file. The default value is `false`.
   ///
-  static Future<Null> remove(
-      {@required String taskId, bool shouldDeleteContent = false}) async {
+  static Future<Null> remove({@required String taskId, bool shouldDeleteContent = false}) async {
     try {
       return await platform.invokeMethod('remove',
           {'task_id': taskId, 'should_delete_content': shouldDeleteContent});
@@ -394,6 +396,7 @@ class FlutterDownloader {
           int process = call.arguments['progress'];
           callback(id, DownloadTaskStatus._internal(status), process);
         }
+        return null;
       });
     } else {
       platform.setMethodCallHandler(null);