doi-doai-openaccess.py 文件源码

def get_doai_oa(doi):
    """ Given a DOI, return DOAI target URL if green open access,
        None otherwise.
    """

    doaiurl = 'http://doai.io/{}'.format(doi)
    try:
        doai = SESSIONDOAI.head(url=doaiurl)
    except requests.ConnectionError:
        time.sleep(random.randint(1, 100))
        return False

    if doai.status_code == 302:
        url = doai.headers['Location']
        if re.search('doi.org', url):
            return None
        else:
            return url