Merge pull request #519 from drdavella/update-asdf-in-fits

Store ASDF-in-FITS data in 1x1 BINTABLE HDU
asdf-format · Jul 23, 2018 · e556175 · e556175
2 parents 791b975 + 5f2b158
commit e556175
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -3,6 +3,8 @@
 
 - Add API function for retrieving history entries. [#501]
 
+- Store ASDF-in-FITS data inside a 1x1 BINTABLE HDU. [#519]
+
 2.0.2 (unreleased)
 ------------------
 

diff --git a/asdf/fits_embed.py b/asdf/fits_embed.py
@@ -263,8 +263,9 @@ def _create_hdu(self, buff, use_image_hdu):
             array = np.frombuffer(buff.getvalue(), np.uint8)
             return fits.ImageHDU(array, name=ASDF_EXTENSION_NAME)
         else:
-            data = buff.getbuffer()
-            column = fits.Column(array=data, format='B', name='ASDF_METADATA')
+            data = np.array(buff.getbuffer(), dtype=np.uint8)[None, :]
+            fmt = '{}B'.format(len(data[0]))
+            column = fits.Column(array=data, format=fmt, name='ASDF_METADATA')
             return fits.BinTableHDU.from_columns([column], name=ASDF_EXTENSION_NAME)
 
     def _update_asdf_extension(self, all_array_storage=None,