Multipart upload to appengine

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轮回少年

I\'m having multiple problems with appengine (java/jersey), but now I\'m stucked with uploading files via multipart.

I\'ve read this answer: https://stackoverflow.co

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隐瞒了意图╮

2021-01-07 14:59

You have to use Blobstore for uploading.

Call blobstoreService.createUploadUrl to create an upload URL for the form that the user will fill out, passing the application path to load when the POST of the form is completed.

<body>
    <form action="<%= blobstoreService.createUploadUrl("/upload") %>" method="post" enctype="multipart/form-data">
        <input type="file" name="myFile">
        <input type="submit" value="Submit">
    </form>
</body>

and then in servlet:

Map<String, List<BlobKey>> blobs = blobstoreService.getUploads(req);
List<BlobKey> blobKeys = blobs.get("myFile");

You can upload files to Storage directly, but passing UploadOptions to .createUploadUrl:

UploadOptions options = new UploadOptions.Builder().withGoogleStorageBucketName("mybucket");
String uploadUrl = blobstoreService.createUploadUrl("/upload", options)

Follow documentation https://cloud.google.com/appengine/docs/java/blobstore/#Java_Uploading_a_blob

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