Can't download a very large dataset by cvat_sdk

[ergouu]

My actions before raising this issue

• [y] Read/searched the docs
• [y] Searched past issues

Steps to Reproduce (for bugs)

This is my code:

        loader=projects_api.retrieve_dataset
        while True:
            # generate dataset zip file
            _,response=loader(
                id=id,
                format=format, # 'ImageNet 1.0'
                location=location, # 'local'
                _parse_response=False
            )
            
            # status code 201 means the zip file has been generated
            if response.status ==201:
                break
            time.sleep(5)

        _,response=loader(
                id=id,
                format=format,
                location=location,
                action='download',
                _parse_response=False
            )
        
        with open(output_file,'wb') as f: # output_file='big_test.zip'
            f.write(response.data)

Expected Behaviour

I want to export a large dataset which contains about 1000+ images by format 'ImageNet 1.0'

Current Behaviour

The zip file has been generated successfully, but the output file specified locally is empty. I think it is beacuse the file is too big to transfer by http session.

CVAT Host, in deffierent network with local host:
/var/lib/docker/volumes/cvat_cvat_data/_data/projects/5/export_cache/dataset_image_net-10.ZIP is which I want to export.

 ergouu@r740:~$ sudo find /var/lib/docker/volumes/cvat_cvat_data/_data/ -name *.ZIP|xargs -i ls -l {}
-rw-r--r-- 1 dell dell 5505275816 Apr 14 10:36 /var/lib/docker/volumes/cvat_cvat_data/_data/projects/3/export_cache/dataset_image_net-10.ZIP
-rw-r--r-- 1 dell dell 3077 Apr 14 11:09 /var/lib/docker/volumes/cvat_cvat_data/_data/projects/3/export_cache/annotations_image_net-10.ZIP
-rw-r--r-- 1 dell dell 106939 Apr 14 08:53 /var/lib/docker/volumes/cvat_cvat_data/_data/projects/9/export_cache/dataset_image_net-10.ZIP
-rw-r--r-- 1 dell dell 93991984216 Apr 14 11:35 /var/lib/docker/volumes/cvat_cvat_data/_data/projects/5/export_cache/dataset_image_net-10.ZIP
-rw-r--r-- 1 dell dell 203245 Apr 14 11:21 /var/lib/docker/volumes/cvat_cvat_data/_data/projects/5/export_cache/annotations_image_net-10.ZIP

Local Host, in Docker:

root@66c2d5f16612:/code# ls -l big_test.zip 
-rw-r--r-- 1 root root 0 Apr 14 11:35 big_test.zip

Possible Solution

Context

Your Environment

CVAT Version:2.3.0

• Git hash commit (git log -1):
• Docker version docker version (e.g. Docker 17.0.05):
• Are you using Docker Swarm or Kubernetes?
• Operating System and version (e.g. Linux, Windows, MacOS):
• Code example or link to GitHub repo or gist to reproduce problem:
• Other diagnostic information / logs:
  Logs from `cvat` container