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December 12, 2016 22:35
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Decoding Snowplow real-time bad rows
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# accompanying tutorial: | |
import base64 | |
import thriftpy | |
from thriftpy.protocol import TCyBinaryProtocolFactory | |
from thriftpy.utils import deserialize, serialize | |
sample_payload = "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" | |
decoded_payload = base64.b64decode(sample_payload) | |
print(decoded_payload) | |
collector = thriftpy.load("collector.thrift") | |
collector_payload = collector.CollectorPayload() | |
raw_payload = deserialize(collector_payload, decoded_payload, TCyBinaryProtocolFactory()) | |
print(raw_payload) | |
querystring = raw_payload.querystring | |
network_userid = raw_payload.networkUserId | |
print(querystring) | |
from urllib import parse | |
params = parse.parse_qs(querystring) | |
print(params) | |
app_id = params.get('aid')[0] | |
print(app_id) |
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Thanks for the article. Made it working for myself with Python 2.
It probably worth mentioning that you have to deal with JSON object first when you pick data from kinesis stream. Collector's payload will be under
line
key in thrift format encoded with base64. Took me some time to figure this out. The full kineses record will also contains some other useful information likeerrors
field.