Hi,
I'm trying to include some additional data in a blobstore upload which I
can then process with the BlobInfo. According
to https://developers.google.com/appengine/docs/java/blobstore/ :
*When the Blobstore rewrites the user's request, the MIME parts of the
uploaded files have their bodies emptied, and the blob key is added as a
MIME part header. All other form fields and parts are preserved and passed
to the upload handler. *
This seems to be working fine on the Dev Server but *not* on the live
AppEngine.
Having got the upload URL from the blobstore service, on the client-side
I'm then doing:
var formData = new FormData();
formData.append("upload-request", JSON.stringify({
myExtraData: "something"
}));
for (var idx = 0; idx < files.length; idx++) {
formData.append(files[idx].name, files[idx]);
}
xhr.open("POST", uploadUrl);
xhr.send(formData);
And then trying to process it on the server side with:
log.warning("isMultipartContent: " +
ServletFileUpload.isMultipartContent(req));
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(req);
int count = 0;
while (iterator.hasNext()) {
++count;
FileItemStream item = iterator.next();
if (item.isFormField()) {
log.warning("Got a form field: " + item.getFieldName());
} else {
log.warning("Got an uploaded file: " + item.getFieldName() +
", name = " + item.getName());
}
}
log.warning("FileItem count = %s", count);
When I run this on the local Dev server, everything works perfectly and it
happily logs both the form field part and the re-written (content-stripped)
file part and a count of 2.
When I run it on the live App Engine, it logs:
isMultipart: true
FileItem count = 0
It seems that the live server, contrary to the documentation, is stripping
all the mime parts from the request.
Note, that the blobs are still retrievable
with blobstore.get{File,Blob}Infos(req), but I cannot access the additional
data that was sent with the request.
Has anyone seen this before? Is this is a known bug or have I
misinterpreted the docs? Does anyone know if the same is true in the Python
runtime? Can anyone suggest a workaround?
Thanks,
Rich
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