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#!/usr/bin/env python3
"""
Fetches and merges all CDX files for a collection.
Calls metadata API to enumerate all items/files, then fetches and concatanates
them all. Requires the 'internetarchive' library.
Call with a collection name:
./cdx_collection SOME_COLLECTION_NAME
"""
import os
import shutil
import subprocess
import sys
import tempfile
import internetarchive as ia
import requests
def run():
if len(sys.argv) != 2:
print("Expected a single argument (collection name)")
sys.exit(-1)
collection = sys.argv[1]
# Check collection name is clean
assert collection.replace('_', '').replace('-', '').replace('.', '').isalnum()
tempdir = tempfile.mkdtemp()
print("Looking up collection: {}".format(collection))
# First fetch list
item_list = list(ia.search_items(query="collection:{} mediatype:web".format(collection)))
if len(item_list) == 0:
print("No items found, bailing")
sys.exit(-1)
print("Found {} potential items".format(len(item_list)))
status = True
errors = []
for item in item_list:
item = item['identifier']
# TODO: error handling
try:
ret = ia.download(item,
files=[item + '.cdx.gz'],
verbose=True,
destdir=tempdir,
no_directory=True,
retries=1000)
status = ret and status
except requests.exceptions.ReadTimeout as rt:
print(str(rt), file=sys.stderr)
errors.append(rt)
continue
if errors:
print("## Download Errors", file=sys.stderr)
for e in errors:
print(e, file=sys.stderr)
# Combine files
print("Merging and re-compressing all CDX files...")
#subprocess.run('zcat {0}/*.cdx.gz | pigz > {0}/combined.gz'.format(tempdir),
subprocess.run('zcat {0}/*.cdx.gz | gzip > {0}/combined.gz'.format(tempdir), shell=True)
# Move and cleanup
shutil.move('{}/combined.gz'.format(tempdir), '{}.cdx.gz'.format(collection))
print("Done!")
if __name__ == '__main__':
run()
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