File upload doesn't really work from my C#.NET client app

[László Heller]

Hi!

I am trying to write a client using the nova.astrometry.net API in C#.NET.
Authentication works well, I can easily obtain session ID for my API key.

However when I want to upload an image using the /api/upload endpoint described here, the server response is following:

HTTP/1.1 200 OK
Date: Wed, 23 Oct 2019 09:36:28 GMT
Server: Apache/2.4.18 (Ubuntu) mod_wsgi/4.3.0 Python/2.7.12
Content-Length: 46
Access-Control-Allow-Origin: *
Content-Type: text/plain; charset=UTF-8

{"status": "error", "errormessage": "no json"}

My request (also attached as a text file) is following:

POST http://nova.astrometry.net/api/upload HTTP/1.1
Content-Type: multipart/form-data; boundary=---------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee
Host: nova.astrometry.net
Content-Length: 781078
Expect: 100-continue

-----------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee
Content-Type: text/plain
MIME-Version: 1.0
Content-disposition: form-data; name="request - json"

{"allow_commercial_use": "d", "allow_modifications": "d", "publicly_visible": "y", "session": "0gihhfytvh1o7ajf1rrt55ynhha38y22"}
-----------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee
Content-Type: application/octet-stream
MIME-Version: 1.0
Content-disposition: form-data; name="file"; filename="66011311_10214710726185818_2918331987305431040_o.jpg"

<ISO-8859-1 ENCODED JPEG FILE CONTENT>
-----------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee--

Any idea, why I am receiving Error - No JSON in the response?

BR,

Ladislav

[Dustin Lang]

It looks like you have "request - json" but it must be "request-json"  -- no spaces.

--
You received this message because you are subscribed to the Google Groups "astrometry" group.
To unsubscribe from this group and stop receiving emails from it, send an email to astrometry+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/3ae108c6-eae4-4def-b6e0-bfd567ebc854%40googlegroups.com.

[László Heller]

Hi!

You're right, but that was not the only problem.
I also incorrectly specified the value of Content-Type for request.

Wrong value:

Content-Type: multipart/form-data; boundary=---------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee

Correct value:

Content-Type: multipart/form-data; boundary="---------------------------0b386c5a-e33a-4db4-bbd9-a5229090ccee"

The boundary separator must be quoted!

The upload works well, but now I have another issue. No job is starting for submission (a JPEG image), because of the following (taken from my astrometry dashboard):

Unfortunately, we couldn't process this submission properly:

       

...get_or_create_image(df)
  File "process_submissions.py", line 586, in get_or_create_image
    img = create_source_list(df)
  File "process_submissions.py", line 673, in create_source_list
    raise e
TypeError: cannot perform reduce with flexible type

   
   

BR,

Ladislav

To unsubscribe from this group and stop receiving emails from it, send an email to astro...@googlegroups.com.

[Dustin Lang]

If you can try again and tell me the submission id, I can check the file contents that were uploaded.  Possibly your encoding is wrong.

To unsubscribe from this group and stop receiving emails from it, send an email to astrometry+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/2248d1d7-3a79-4629-a019-992838afb513%40googlegroups.com.

[László Heller]

Hi!

Last submission ID is 3002549. I tried encodings ASCII, UTF8 and ISO-8859-1.

BR,

Ladislav

To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/2248d1d7-3a79-4629-a019-992838afb513%40googlegroups.com.

[Dustin Lang]

If you're uploading *data*, I don't think you should be using an encoding.  It's just an octet-stream, right?

Attached is the file we received.  Maybe this will help you sort out what went wrong.

By the way, the format is *exactly* what would be sent from a plain old HTML form with a text box named "request-json" and a file upload box.

cheers,

--dustin

To unsubscribe from this group and stop receiving emails from it, send an email to astrometry+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/f518bf19-1784-4917-8552-b789fe68c33f%40googlegroups.com.

[László Heller]

Hi!

Again you're right, I don't need to use any encoding, just simple put the image file content as byte array to the second part of multipart request body. That's it, now it works!

Thanks for tips and best regards,

Ladislav

To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/f518bf19-1784-4917-8552-b789fe68c33f%40googlegroups.com.