Improve download of http files

Issue-ID: OOM-1803

Change-Id: If2aeb1aa4fab27641511a6300832ccd7be95e846
Signed-off-by: Milan Verespej <m.verespej@partner.samsung.com>

2 files changed, 160 insertions, 1 deletions

diff --git a/build/download/base.py b/build/download/base.py
index e3081638..5bcd0ef6 100644
--- a/build/download/base.py
+++ b/build/download/base.py
@@ -20,8 +20,11 @@
 #   COPYRIGHT NOTICE ENDS HERE
 
 
-import progressbar
 import concurrent.futures
+import os
+import progressbar
+import prettytable
+import requests
 from distutils.spawn import find_executable
 
 progressbar.streams.wrap_stdout()
@@ -84,3 +87,28 @@ def finish_progress(progress, error_count, log):
 
 def check_tool(name):
     return find_executable(name)
+
+def save_to_file(dst, content):
+    """
+    Save downloaded byte content to file
+    :param dst: path to file to save content to
+    :param content: byte content of file
+    """
+    dst_dir = os.path.dirname(dst)
+    if not os.path.exists(dst_dir):
+        os.makedirs(dst_dir)
+    with open(dst, 'wb') as dst_file:
+        dst_file.write(content)
+
+def make_get_request(url):
+    req = requests.get(url)
+    req.raise_for_status()
+    return req
+
+def simple_check_table(target, missing):
+    table = prettytable.PrettyTable(['Name', 'Downloaded'])
+    table.align['Name'] = 'l'
+    for item in sorted(target):
+        table.add_row([item, item not in missing])
+    return table
+
diff --git a/build/download/http_files.py b/build/download/http_files.py
new file mode 100755
index 00000000..f5b1e59a
--- /dev/null
+++ b/build/download/http_files.py
@@ -0,0 +1,131 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+#   COPYRIGHT NOTICE STARTS HERE
+
+#   Copyright 2019 © Samsung Electronics Co., Ltd.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+#   COPYRIGHT NOTICE ENDS HERE
+
+
+import argparse
+import concurrent.futures
+import logging
+import os
+import sys
+from retrying import retry
+
+import base
+
+log = logging.getLogger(__name__)
+
+@retry(stop_max_attempt_number=5, wait_fixed=2000)
+def get_file(file_uri):
+    """
+    Get file from the Internet
+    :param file_uri: address of file
+    :return: byte content of file
+    """
+    if not file_uri.startswith('http'):
+        file_uri = 'http://' + file_uri
+    file_req = base.make_get_request(file_uri)
+    return file_req.content
+
+
+def download_file(file_uri, dst_dir):
+    """
+    Download http file and save it to file.
+    :param file_uri: http address of file
+    :param dst_dir: directory where file will be saved
+    """
+    log.info('Downloading: {}'.format(file_uri))
+    dst_path = '{}/{}'.format(dst_dir, file_uri.rsplit('//')[-1])
+    try:
+        file_content = get_file(file_uri)
+        base.save_to_file(dst_path, file_content)
+    except Exception as err:
+        if os.path.isfile(dst_path):
+            os.remove(dst_path)
+        log.error('Error downloading: {}: {}'.format(file_uri, err))
+        raise err
+    log.info('Downloaded: {}'.format(file_uri))
+
+
+def missing(file_set, dst_dir):
+    return {file for file in file_set if not os.path.isfile('{}/{}'.format(dst_dir, file))}
+
+
+def download(data_list, dst_dir, check, progress, workers=None):
+    """
+    Download files specified in data list
+    :param data_list: path to file with list
+    :param dst_dir: destination directory
+    :param check: boolean check mode
+    :param progress: progressbar.ProgressBar to monitor progress
+    :param workers: workers to use for parallel execution
+    :return: 0 if success else number of errors
+    """
+    file_set = base.load_list(data_list)
+    missing_files = missing(file_set, dst_dir)
+    target_count = len(file_set)
+
+    if check:
+        log.info(base.simple_check_table(file_set, missing_files))
+        return 0
+
+    skipping = file_set - missing_files
+
+    base.start_progress(progress, len(file_set), skipping, log)
+
+    error_count = base.run_concurrent(workers, progress, download_file, missing_files, dst_dir)
+
+    if error_count > 0:
+        log.error('{} files were not downloaded. Check log for specific failures.'.format(error_count))
+
+    base.finish_progress(progress, error_count, log)
+
+    return error_count
+
+def run_cli():
+    """
+    Run as cli tool
+    """
+    parser = argparse.ArgumentParser(description='Download http files from list')
+    parser.add_argument('file_list', metavar='file-list',
+                        help='File with list of http files to download')
+    parser.add_argument('--output-dir', '-o', default=os.getcwd(),
+                        help='Destination directory for saving')
+    parser.add_argument('--check', '-c', action='store_true', default=False,
+                        help='Check mode')
+    parser.add_argument('--debug', action='store_true', default=False,
+                        help='Turn on debug output')
+    parser.add_argument('--workers', type=int, default=None,
+                        help='Set maximum workers for parallel download (default: cores * 5)')
+
+    args = parser.parse_args()
+
+    if args.debug:
+        logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
+    else:
+        logging.basicConfig(stream=sys.stdout, level=logging.INFO, format='%(message)s')
+
+    progress = base.init_progress('http files') if not args.check else None
+
+    sys.exit(download(args.file_list, args.output_dir, args.check, progress, args.workers))
+
+
+if __name__ == '__main__':
+    run_cli()
+