为什么我不能从 Firebase 存储中下载该文件，即使该文件存在？

Question

我收到以下错误。似乎找不到该文件，但我使用listAll() 函数进行检查，我在该位置看到了该文件。

Future<void> downloadMyApp(String MyAppURL) async { 
    final storagePath = await _firebaseStorage.ref().child('MyApp/Groups/groupChats/0exUS3P2XKFQ007TIMmm').listAll();

    for (var item in storagePath.items) {
      // The items under storageRef.
      print('##MyApp## downloadMyApp item: ' + item.toString()); //I see the item here and its path is identical to MyAppURL
    }

    final MyAppRef = _firebaseStorage.ref().child(MyAppURL);
    final dir = await getApplicationDocumentsDirectory();
    final filename = dir.path + receivedMyAppsDir + '/' + MyAppRef.name; 
    final file = File(filename);

    try {
      final downloadTask = MyAppRef.writeToFile(file);
      downloadTask.snapshotEvents.listen((taskSnapshot) {
        switch (taskSnapshot.state) {
          case TaskState.running:
            print('##MyApp## downloadMyApp downloadTask running');
            break;
          case TaskState.paused:
            print('##MyApp## downloadMyApp downloadTask paused');
            break;
          case TaskState.success:
            print('##MyApp## downloadMyApp downloadTask success');
            break;
          case TaskState.canceled:
            print('##MyApp## downloadMyApp downloadTask canceled');
            break;
          case TaskState.error:
            print('##MyApp## downloadMyApp downloadTask error');
            break;
        }
      });
    } catch (e) { //on FirebaseException
      // Caught an exception from Firebase.
      print('##MyApp## downloadMyApp ERROR: ' + e.toString());
    }

  }

E/FileDownloadTask(30544): Exception occurred during file write.  Aborting.
E/FileDownloadTask(30544): java.io.IOException: No such file or directory
E/FileDownloadTask(30544):  at java.io.UnixFileSystem.createFileExclusively0(Native Method)
E/FileDownloadTask(30544):  at java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:317)
E/FileDownloadTask(30544):  at java.io.File.createNewFile(File.java:1006)
E/FileDownloadTask(30544):  at com.google.firebase.storage.FileDownloadTask.processResponse(FileDownloadTask.java:136)
E/FileDownloadTask(30544):  at com.google.firebase.storage.FileDownloadTask.run(FileDownloadTask.java:228)
E/FileDownloadTask(30544):  at com.google.firebase.storage.StorageTask.lambda$getRunnable$7$StorageTask(StorageTask.java:1072)
E/FileDownloadTask(30544):  at com.google.firebase.storage.-$$Lambda$StorageTask$q9YBoR_A8LB-JxTCx8JRQvabaZs.run(Unknown Source:2)
E/FileDownloadTask(30544):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/FileDownloadTask(30544):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/FileDownloadTask(30544):  at java.lang.Thread.run(Thread.java:920)
E/StorageException(30544): StorageException has occurred.
E/StorageException(30544): An unknown error occurred, please check the HTTP result code and inner exception for server response.
E/StorageException(30544):  Code: -13000 HttpResult: 200
E/StorageException(30544): No such file or directory
E/StorageException(30544): java.io.IOException: No such file or directory
E/StorageException(30544):  at java.io.UnixFileSystem.createFileExclusively0(Native Method)
E/StorageException(30544):  at java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:317)
E/StorageException(30544):  at java.io.File.createNewFile(File.java:1006)
E/StorageException(30544):  at com.google.firebase.storage.FileDownloadTask.processResponse(FileDownloadTask.java:136)
E/StorageException(30544):  at com.google.firebase.storage.FileDownloadTask.run(FileDownloadTask.java:228)
E/StorageException(30544):  at com.google.firebase.storage.StorageTask.lambda$getRunnable$7$StorageTask(StorageTask.java:1072)
E/StorageException(30544):  at com.google.firebase.storage.-$$Lambda$StorageTask$q9YBoR_A8LB-JxTCx8JRQvabaZs.run(Unknown Source:2)
E/StorageException(30544):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/StorageException(30544):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/StorageException(30544):  at java.lang.Thread.run(Thread.java:920)
E/StorageException(30544): StorageException has occurred.
E/StorageException(30544): An unknown error occurred, please check the HTTP result code and inner exception for server response.
E/StorageException(30544):  Code: -13000 HttpResult: 200
E/StorageException(30544): No such file or directory
E/StorageException(30544): java.io.IOException: No such file or directory
E/StorageException(30544):  at java.io.UnixFileSystem.createFileExclusively0(Native Method)
E/StorageException(30544):  at java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:317)
E/StorageException(30544):  at java.io.File.createNewFile(File.java:1006)
E/StorageException(30544):  at com.google.firebase.storage.FileDownloadTask.processResponse(FileDownloadTask.java:136)
E/StorageException(30544):  at com.google.firebase.storage.FileDownloadTask.run(FileDownloadTask.java:228)
E/StorageException(30544):  at com.google.firebase.storage.StorageTask.lambda$getRunnable$7$StorageTask(StorageTask.java:1072)
E/StorageException(30544):  at com.google.firebase.storage.-$$Lambda$StorageTask$q9YBoR_A8LB-JxTCx8JRQvabaZs.run(Unknown Source:2)
E/StorageException(30544):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/StorageException(30544):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/StorageException(30544):  at java.lang.Thread.run(Thread.java:920)
E/flutter (30544): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: [firebase_storage/unknown] An unknown error occurred
E/flutter (30544): 

Answer 1

你能解决这个问题吗？

我现在有同样的问题