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lambda-utils
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lambda-utils
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import os
import hashlib
import json
import requests
import boto3
from requests_aws4auth import AWS4Auth
from botocore.errorfactory import ClientError
def create_hash(value):
sha = hashlib.md5()
sha.update(value.encode())
return sha.hexdigest()
class ElasticSearchHelper(object):
def __init__(self, host):
credentials = boto3.Session().get_credentials()
region = boto3.Session().region_name
self.awsauth = AWS4Auth(credentials.access_key, credentials.secret_key, region, 'es', session_token=credentials.token)
self.host = host
def create_index(self, index_name):
settings = {
"settings" : {
"number_of_shards" : 1,
"number_of_replicas" : 1
}
}
headers = {"Content-Type": "application/json"}
url = self.host + '/' + index_name
response = requests.put(url, auth=self.awsauth, data=json.dumps(settings), headers=headers)
return response.content
def delete_all_index(self):
del_url = f'{self.host}/_all'
response = requests.delete(del_url, auth=self.awsauth, headers={"Content-Type": "application/json"})
return response.content
def insert_to_index(self, data, index):
es_url = f'{self.host}/{index}/_doc'
for message in data:
key = ''.join([str(message[c]) for c in ["tweet_id", "name", "screen_name", "created_at"]])
url = es_url + "/" + create_hash(key)
rs = requests.post(url, auth=self.awsauth, data=json.dumps(message), headers={"Content-Type": "application/json"})
print(rs.content)
class S3Helper(object):
def __init__(self, bucket):
self.client = boto3.client('s3')
self.bucket = bucket
@staticmethod
def string_to_int(int_text):
try:
return int(int_text)
except ValueError:
return -1
def read_tweet(self, key):
tweet_data = {}
try:
result = self.client.get_object(Bucket=self.bucket, Key=key)
tokens = str(result["Body"].read().decode()).split("\t")
if len(tokens) > 8:
tweet_data = {
'tweet_id': tokens[0].replace("\n", "").strip(),
'name': tokens[1].strip(),
'screen_name': tokens[2].strip(),
'full_text': tokens[3].strip(),
'followers_count': self.string_to_int(tokens[4].strip()),
'location': tokens[5].strip(),
'geo': tokens[6].strip(),
'created_at': tokens[7].strip()
}
else:
print("Wrong format: ", tokens)
except ClientError as e:
# Not found
print("ERROR: ", e)
return tweet_data