API to fetch user details from Twitter

          ******************* (First Program with name oauth1.py) *****************

#######################  Start of the Program

#!/usr/bin/python

import time
import random
import urllib

# crypto imports
import base64
import hmac
from hashlib import sha1

# this style is from python urllib implementation
nonce_alphabet = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
                  'abcdefghijklmnopqrstuvwxyz'
                  '0123456789')

def encode(s):
    """encode a url component"""
    return urllib.quote(s, "~")

def now():
    """returns the current unix timestamp"""
    epoch = int(time.time())
    return str(epoch)

def nonce():
    """returns a 24 letter nonce"""
    choices = []
    choices = [random.choice(nonce_alphabet) for i in xrange(24)]
    return ''.join(choices)

def authorization_header(token, method, url, query={}, post_query={}):
    """returns the header value for key Authorization (oauth impl)"""

    # build basic oauth variables
    oauth_consumer_key = token['oauth_consumer_key']
    oauth_nonce = nonce()
    oauth_signature_method = 'HMAC-SHA1'
    oauth_timestamp = now()
    oauth_token = token['oauth_token']
    oauth_version = '1.0'

    # compute signature
    dict = {
        'oauth_consumer_key': oauth_consumer_key,
        'oauth_nonce': oauth_nonce,
        'oauth_signature_method': oauth_signature_method,
        'oauth_timestamp': oauth_timestamp,
        'oauth_token': oauth_token,
        'oauth_version': oauth_version
    }
    dict.update(query)
    dict.update(post_query)
    param_str = urllib.urlencode(sorted(dict.iteritems())) # important step
    key = "{0}&{1}".format(token['oauth_consumer_secret'],
                           token['oauth_token_secret'])
    msg = "&".join(map(encode, [method, url, param_str]))
    m = hmac.new(key, msg, sha1)
    digest = m.digest()
    digestb64 = base64.b64encode(digest)
    oauth_signature = encode(digestb64)

    # build header
    auth_items = []
    auth_items.append('oauth_consumer_key="' + oauth_consumer_key + '"')
    auth_items.append('oauth_nonce="' + oauth_nonce + '"')
    auth_items.append('oauth_signature="' + oauth_signature + '"')
    auth_items.append('oauth_signature_method="' + oauth_signature_method + '"')
    auth_items.append('oauth_timestamp="' + oauth_timestamp + '"')
    auth_items.append('oauth_token="' + oauth_token + '"')
    auth_items.append('oauth_version="' + oauth_version + '"')

    return "OAuth " + ",".join(auth_items)

if __name__ == "__main__":
    input = 'k1=v1&k2=v2'
    print("encode '" + input + "': " + encode(input))

    print("now: " + now())

    print("a nonce: " + nonce())

    token = {
        'oauth_consumer_key': 'CON-KEY',
        'oauth_consumer_secret': 'CON-S3KR3T',
        'oauth_token': 'TOK',
        'oauth_token_secret': 'TOK-S3KR3T'
    }
    print("auth header: " + authorization_header(token, 'GET',
                                                 'https://localhost'))

#######################  End of the Program



       ************************** (Second Program which will use oauth1.py) ***************

####################  Start of the Program

#!/usr/bin/python

import os
import sys
import urllib
import urllib2
import json
#from simplejson import *
import logging

#sys.path.append(os.path.join('..', '..', 'main', 'python'))
import oauth1

#file_name=sys.argv[1]

# Path I used here to print result in file in my lappi  folder. You can specify your own path
# or can also ignore if don't want to write in some output file
path='/home/nitin/Nitin/Python'

logging.basicConfig(filename='twitter.log', level=logging.INFO)
logging.info("initialized logging")

def fetch(name):
    logging.info("fetching user details for '" + str(name) + "'")

    url = 'https://api.twitter.com/1.1/users/show.json'
    url_params = {'screen_name': name}

    qs = urllib.urlencode(url_params)
    #url_with_qs = url if len(qs) == 0 else url + "?" + qs
    if len(qs) == 0:
        url_with_qs=url
    else:
        url_with_qs=url + "?" + qs

    req = urllib2.Request(url_with_qs)
    req.add_header('Accept', '*/*')
    req.add_header('User-Agent', 'ni-client v0.0.1')
    req.add_header('Authorization', oauth1.authorization_header(token, 'GET', url, url_params))

    try:
        r = urllib2.urlopen(req)
        resp = r.read()
        logging.info("response status code: " + str(r.getcode()))
        print resp
        return resp
    except:
        print "Error while fetching ", name

def fetch_twitter_api():
    file_handles=open(file_name,'r')
    file=open(path + '/screen_firsttokenids.txt','w')
    for handle in file_handles.readlines():
        if handle:
            resp=fetch(handle)
            if resp:
                json_dict=json.loads(resp)
                twi_ID=json_dict['id']
                twi_retweet_count=0
                if json_dict.has_key('status'):
                    if json_dict['status']['retweet_count']:
                        twi_retweet_count=json_dict['status']['retweet_count']
                twi_fav_count=json_dict['favourites_count']
                handle=str(handle).strip()
                print "Screen_name: %s , ID: %s , retweet count: %s, Fav count: %s"% (handle, twi_ID,twi_retweet_count,twi_fav_count)
                output = "\nScreen_name: %s , ID: %s , retweet count: %s, Fav count: %s"% (handle, twi_ID, twi_retweet_count, twi_fav_count)
                #output="\nScreen_name %s , ID %s"% (handle, ID)
                file.write(output)
            else:
                handle=str(handle).strip()
                print "Got Error for Screen_name %s"% (handle)
                output="\nGot Error for Screen_name %s"% (handle)
                file.write(output)
    file.close()


if __name__ == "__main__":
    token = {
        'oauth_consumer_key': 'o5XSukmMltriI3O78BgRw',
        'oauth_consumer_secret': 'tuNfB4MpagDr9Znhg4y9s6x7LDfxtZj0XmSYnoDYo4',
        'oauth_token': '1062703507-p6fMLHSa0C9v9VbtsNzBsRtDdZQNJ2C9yEX4VyN',
        'oauth_token_secret': 'sjxIXvmAtTYsvCdzvpN72sYQQahLmqxlkRqEm4bmI70'
    }
    #print(fetch('syncapse'))
    #print(fetch('samsungtweets'))
    fetch('nitin89syncapse')
    #fetch('_1E')
    #fetch_twitter_api()

#############################  End of the Program