error when reading a file

[nes123]

Hello, i have a tiff file that i can open with rasterio.

But i get the following error with COGReader:

File "/usr/local/lib/python3.9/site-packages/rio_tiler/io/cogeo.py", line 101, in attrs_post_init
self.nodata = self.nodata if self.nodata is not None else self.dataset.nodata
AttributeError: '_GeneratorContextManager' object has no attribute 'nodata'

[nes123]

with rasterio.open(blob_in_bytes) as src:
print(src.profile)

results in this output:

{'driver': 'GTiff', 'dtype': 'uint16', 'nodata': 0.0, 'width': 590, 'height': 1478, 'count': 4, 'crs': CRS.from_epsg(32610), 'transform': Affine(3.0, 0.0, 540492.0,
0.0, -3.0, 4185945.0), 'blockxsize': 256, 'blockysize': 256, 'tiled': True, 'compress': 'lzw', 'interleave': 'pixel'}

[kylebarron]

What version of rio-tiler are you using?

[nes123]

rio-tiler-2.1.4

[kylebarron]

Can you provide a reproducible example? You haven't even told us what command you're running. It's likely because the dataset attribute is something unexpected.

[nes123]

I am reading from google storage:

bucket = client.bucket("bucket_name")
blob = bucket.blob(path-in-bucket)
blob_in_bytes = io.BytesIO(blob)
with COGReader(blob_in_bytes) as image:
print(image.dataset)

[kylebarron]

Refer to the COGReader documentation and (https://cogeotiff.github.io/rio-tiler/readers/#rio_tileriocogreader) on how to use it. Is blob_in_bytes actually the bytes of the file? I doubt it... bucket.blob I think references the file but doesn't download it. And the first argument of COGReader is input, which is "Cloud Optimized GeoTIFF path.". Alternatively you could provide a dataset argument with a rasterio dataset, but a blob is not a dataset.

[kylebarron]

You should be able to pass a filepath that rasterio understands directly to rio-tiler. I.e.

COGReader('s3://bucket/path')

You should look up if you can do the same with GCS.

[nes123]

When I am trying to read directly from the cloud i get:

rasterio.errors.RasterioIOError: CPLRSASHA256Sign() not implemented: GDAL must be built against libcrypto++ or libcrypto (openssl)

[nes123]

saving the file locally and then opening it solved the problem. Thank you for your help.

[vincentsarago]

Thanks for reporting the issue @nes123.

There might be something at rasterio level 🤷

what you could do is

with rasterio.open(blob_in_bytes) as src:
     with COGReader(None, dataset=src) as cog:
          ....

The issue is that when you pass blob_in_bytes to COGReader we are not using a context manager https://github.com/cogeotiff/rio-tiler/blob/master/rio_tiler/io/cogeo.py#L114 but a simple dataset = rasterio.open(input).