Summon API searches with Python

summon_search.py

"""
Search Summon API with Python.
See Dough Chesnut's Code4Lib mailing list post: http://serials.infomotions.com/code4lib/archive/2010/201010/2408.html
"""
import httplib2
import urllib
from datetime import datetime
import hmac
import base64
import hashlib
from pprint import pprint

api_id = 'org'
api_key = 'key'

summonHost = 'api.summon.serialssolutions.com'
summonPath = '/search'
def summonMkHeaders(querystring):
            summonAccessID = api_id
            summonSecretKey = api_key
            summonAccept = "application/json"
            summonThedate = datetime.utcnow().strftime("%a, %d %b %Y %H:%M:%S GMT")
            summonQS = "&".join(sorted(querystring.split('&')))
            summonQS = urllib.unquote_plus(summonQS)
            summonIdString = summonAccept + "\n" + summonThedate + "\n" + summonHost + "\n" + summonPath + "\n" + summonQS + "\n"
            summonDigest = base64.encodestring(hmac.new(summonSecretKey, unicode(summonIdString), hashlib.sha1).digest())
            summonAuthstring = "Summon "+summonAccessID+';'+summonDigest
            summonAuthstring = summonAuthstring.replace('\n','')
            return {'Accept':summonAccept,'x-summon-date':summonThedate,'Host':summonHost,'Authorization':summonAuthstring}

http = httplib2.Http()
qstring='q=forest'
url = 'http://%s%s?%s' % (summonHost, summonPath, qstring)
headers = summonMkHeaders(qstring)
print headers
response, content = http.request(url, 'GET', headers=headers)
print response
pprint(content)