将本地图像上传到 Firebase 存储 (Unity3D)答案

【问题标题】：Upload a local image to Firebase storage (Unity3D)将本地图像上传到 Firebase 存储 (Unity3D)
【发布时间】：2017-03-20 03:23:58
【问题描述】：

我需要将我的照片从本地路径上传到我的 firebase 存储，但我不断收到错误

System.AggregateException: Exception of type 'System.AggregateException' was thrown.

Firebase.Storage.StorageException: An unknown error occurred, please check the HTTP result code and inner exception for server response. ---> System.IO.FileNotFoundException: Could not find file "C:\Users\jorren\AppData\LocalLow\DefaultCompany\JKL\636256043481512729.jpg".
File name: 'C:\Users\jorren\AppData\LocalLow\DefaultCompany\JKL\636256043481512729.jpg'
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00209] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/FileStream.cs:305 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.File.OpenRead (System.String path) [0x00000] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/File.cs:363 
  at Firebase.Storage.UploadTask..ctor (Firebase.Storage.StorageReference targetRef, Firebase.Storage.StorageMetadata metadata, System.String file, System.Uri existingUploadUri, System.Threading.Tasks.TaskCompletionSource`1 userTask, IProgress`1 progress, CancellationToken token, System.Threading.SynchronizationContext ctx) [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---

UnityEngine.Debug:Log(Object)
Kudan.AR.Samples.<uploadToStorage>c__Iterator1:MoveNext() (at Assets/KudanAR/Samples/Scripts/SampleApp.cs:122)
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

这是我的代码：

Firebase.Storage.FirebaseStorage storage = Firebase.Storage.FirebaseStorage.DefaultInstance;
        Firebase.Storage.StorageMetadata metadata;
        // Create a storage reference from our storage service
        Firebase.Storage.StorageReference storage_ref = storage.GetReferenceFromUrl("gs://sylpauljoyce-d9115.appspot.com");
        Firebase.Storage.StorageReference rivers_ref = storage_ref.Child("images/" + filename);
        string fileContents = Application.persistentDataPath + "/" + filename;
        var task = rivers_ref.PutFileAsync(fileContents);

        yield return new WaitUntil(() => task.IsCompleted);
         if (task.IsFaulted) {
             Debug.Log(task.Exception.ToString());
        } else {
            fileContents = "";
            Debug.Log("Finished uploading... Download Url: " + task.Result.DownloadUrl.ToString());
            url = task.Result.DownloadUrl.ToString ();

            Debug.Log (url);
        }

我尝试使用 PutBytesAsync 代替 putFileAsync 并没有收到错误，但上传的文件类型是 application/octet-stream

我非常需要帮助。谢谢！

【问题讨论】：

标签： android unity3d firebase firebase-storage

【解决方案1】：

这里好像有两个问题：

初始错误来自Could not find file "C:\Users\jorren\AppData\LocalLow\DefaultCompany\JKL\636256043481512729.jpg"。您是否检查过该文件是否存在于磁盘上？好像找不到:(
内容类型由文件元数据设置，如果找不到则默认为application/octet-stream。对于磁盘上的文件，我们通常可以从文件中选择内容类型，但对于内存中的数据，我们不能。只需在元数据中设置内容类型（根据 the docs）。

例子：

// Create file metadata including the content type
var new_metadata = new Firebase.Storage.MetadataChange();
new_metadata.ContentType = "image/jpeg";

// Upload data and metadata
mountains_ref.PutBytesAsync(custom_bytes, new_metadata, ...)

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