Hi,
I'm currently creating an android app but have got stuck trying to upload
images to google cloud storage through cloud endpoints. Originally my idea
was to upload the image byte array (they are 100kb max images) through the
rest endpoint however I receive errors as the data when encoded to base64
has some characters that JSON doesn't like (according to my error console
anyway). My second shot was to use the BlobstoreService with code:
BlobstoreService blobstoreService = BlobstoreServiceFactory.
getBlobstoreService();
UploadOptions uploadOptions = UploadOptions.Builder.
withGoogleStorageBucketName("dcimg13");
String url = blobstoreService.createUploadUrl("/uploaded", uploadOptions);
Then once returned to the Android device, I use the following code to
upload the image:
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.
BROWSER_COMPATIBLE);
entity.addPart("data", new ByteArrayBody(data,"image/png","img.png"));
httppost.setEntity(entity);
String res = EntityUtils.toString( httpclient.execute(httppost).getEntity(),
"UTF-8");
This seems to work and upload the image (Although I get a 404 error because
the "/uploaded" page does not exist). However, I have no idea how I can
find the key. How can I find this key?
Also, with this code I manage to retrieve the URL for the image (only after
manually looking up the key for the image in the datastore first):
private String getThumbUrl(BlobKey blobkey){
ServingUrlOptions options = ServingUrlOptions.Builder.withBlobKey(blobkey);
try {
return ImagesServiceFactory.getImagesService().getServingUrl(options);
} catch(IllegalArgumentException e) {
e.printStackTrace();
return null;
} catch(ImagesServiceFailureException e) {
e.printStackTrace();
return null;
}
}
However, for some reason the image at the url has kind of inverted colours
etc. (black is blue and white is black). The images I am uploading are
indexed png's. Could that have anything to do with it?
Cheers,
Ben
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