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+#!/usr/bin/env nix-shell
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+#! nix-shell -i python3 -p python3 python3Packages.urllib3
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+# From https://scipython.com/blog/doi-to-bibtex/
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+import sys
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+import urllib.request
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+from urllib.error import HTTPError
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+
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+BASE_URL = 'http://dx.doi.org/'
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+
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+try:
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+ doi = sys.argv[1]
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+except IndexError:
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+ print('Usage:\n{} <doi>'.format(sys.argv[0]))
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+ sys.exit(1)
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+
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+url = BASE_URL + doi
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+req = urllib.request.Request(url)
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+req.add_header('Accept', 'application/x-bibtex')
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+try:
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+ with urllib.request.urlopen(req) as f:
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+ bibtex = f.read().decode()
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+ print(bibtex)
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+except HTTPError as e:
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+ if e.code == 404:
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+ print('DOI not found.')
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+ else:
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+ print('Service unavailable.')
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+ sys.exit(1)
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