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Merged
merged 6 commits into from
May 1, 2023
Merged

feat(jmespath): new built-in envelopes to unwrap S3 events #2169

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ef81b2f
feat(jmespath): adding new envelopes + docs + small fix
leandrodamascena Apr 26, 2023
0de8370
feat(jmespath): text
leandrodamascena Apr 27, 2023
b13a6f9
Merge branch 'develop' into jmespath/envelopes
leandrodamascena Apr 27, 2023
7528d07
chore: addressing Ruben's feedback
leandrodamascena Apr 27, 2023
a5152dc
feat(jmespath): addressing Heitor's feedback
leandrodamascena Apr 28, 2023
ef54196
chore: break message in two sentences.
heitorlessa May 1, 2023
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5 changes: 5 additions & 0 deletions aws_lambda_powertools/utilities/jmespath_utils/envelopes.py
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Expand Up @@ -6,3 +6,8 @@
CLOUDWATCH_EVENTS_SCHEDULED = EVENTBRIDGE
KINESIS_DATA_STREAM = "Records[*].kinesis.powertools_json(powertools_base64(data))"
CLOUDWATCH_LOGS = "awslogs.powertools_base64_gzip(data) | powertools_json(@).logEvents[*]"
S3_SNS_SQS = "Records[*].powertools_json(body).powertools_json(Message).Records[0]"
S3_RAWSNS_SQS = "Records[*].powertools_json(body).Records[0]"
S3_SNS_KINESIS_FIREHOSE = "records[*].powertools_json(powertools_base64(data)).powertools_json(Message).Records[0]"
S3_RAWSNS_KINESIS_FIREHOSE = "records[*].powertools_json(powertools_base64(data)).Records[0]"
S3_EVENTBRIDGE_SQS = "Records[*].powertools_json(body).detail"
28 changes: 18 additions & 10 deletions docs/utilities/jmespath_functions.md
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Expand Up @@ -64,16 +64,24 @@ We provide built-in envelopes for popular AWS Lambda event sources to easily dec

These are all built-in envelopes you can use along with their expression as a reference:

| Envelope | JMESPath expression |
| --------------------------------- | ------------------------------------------------------------- |
| **`API_GATEWAY_REST`** | `powertools_json(body)` |
| **`API_GATEWAY_HTTP`** | `API_GATEWAY_REST` |
| **`SQS`** | `Records[*].powertools_json(body)` |
| **`SNS`** | `Records[0].Sns.Message | powertools_json(@)` |
| **`EVENTBRIDGE`** | `detail` |
| **`CLOUDWATCH_EVENTS_SCHEDULED`** | `EVENTBRIDGE` |
| **`KINESIS_DATA_STREAM`** | `Records[*].kinesis.powertools_json(powertools_base64(data))` |
| **`CLOUDWATCH_LOGS`** | `awslogs.powertools_base64_gzip(data) | powertools_json(@).logEvents[*]` |
| Envelope | JMESPath expression |
| --------------------------------- | ------------------------------------------------------------------------------------------ |
| **`API_GATEWAY_HTTP`** | `powertools_json(body)` |
| **`API_GATEWAY_REST`** | `powertools_json(body)` |
| **`CLOUDWATCH_EVENTS_SCHEDULED`** | `detail` |
| **`CLOUDWATCH_LOGS`** | `awslogs.powertools_base64_gzip(data) | powertools_json(@).logEvents[*]` |
| **`EVENTBRIDGE`** | `detail` |
| **`KINESIS_DATA_STREAM`** | `Records[*].kinesis.powertools_json(powertools_base64(data))` |
| **`S3_EVENTBRIDGE_SQS`** | `Records[*].powertools_json(body).detail` |
| **`S3_RAWSNS_KINESIS_FIREHOSE`** | `records[*].powertools_json(powertools_base64(data)).Records[0]` |
| **`S3_RAWSNS_SQS`** | `Records[*].powertools_json(body).Records[0]` |
| **`S3_SNS_KINESIS_FIREHOSE`** | `records[*].powertools_json(powertools_base64(data)).powertools_json(Message).Records[0]` |
| **`S3_SNS_SQS`** | `Records[*].powertools_json(body).powertools_json(Message).Records[0]` |
| **`SNS`** | `Records[0].Sns.Message | powertools_json(@)` |
| **`SQS`** | `Records[*].powertools_json(body)` |

???+ tip
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Niiiice!! You can make it slightly better by:

  • Adding a title so ESL readers know upfront if they should care or not e.g., "Using SNS?"
  • Educate the reader that if they do need SNS event metadata they don't need to enable it

Write, review, cut the unnecessary words without losing its original intent, and ship it <3

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  • Added the title
  • I thought of the following mental model to improve this text, and see if it makes sense.
    • Benefits - Reduce payload size
    • How to do - enabling raw message
    • why? - architectures that require sending event notifications from S3 to SNS but not require SNS metadata

If you're using architectures that involve sending event notifications from S3 to SNS and then to SQS or Kinesis Data Firehose, consider enabling the [raw message delivery](https://docs.aws.amazon.com/sns/latest/dg/sns-large-payload-raw-message-delivery.html){target="_blank"} option in Amazon SNS. This can help reduce the payload by stripping the SNS metadata.

## Advanced

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20 changes: 10 additions & 10 deletions docs/utilities/validation.md
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Expand Up @@ -141,16 +141,16 @@ We provide built-in envelopes to easily extract the payload from popular event s

Here is a handy table with built-in envelopes along with their JMESPath expressions in case you want to build your own.

| Envelope name | JMESPath expression |
| ------------------------------- | ------------------------------------------------------------- |
| **API_GATEWAY_REST** | "powertools_json(body)" |
| **API_GATEWAY_HTTP** | "powertools_json(body)" |
| **SQS** | "Records[*].powertools_json(body)" |
| **SNS** | "Records[0].Sns.Message | powertools_json(@)" |
| **EVENTBRIDGE** | "detail" |
| **CLOUDWATCH_EVENTS_SCHEDULED** | "detail" |
| **KINESIS_DATA_STREAM** | "Records[*].kinesis.powertools_json(powertools_base64(data))" |
| **CLOUDWATCH_LOGS** | "awslogs.powertools_base64_gzip(data) | powertools_json(@).logEvents[*]" |
| Envelope | JMESPath expression |
| --------------------------------- | ------------------------------------------------------------------------ |
| **`API_GATEWAY_HTTP`** | `powertools_json(body)` |
| **`API_GATEWAY_REST`** | `powertools_json(body)` |
| **`CLOUDWATCH_EVENTS_SCHEDULED`** | `detail` |
| **`CLOUDWATCH_LOGS`** | `awslogs.powertools_base64_gzip(data) | powertools_json(@).logEvents[*]` |
| **`EVENTBRIDGE`** | `detail` |
| **`KINESIS_DATA_STREAM`** | `Records[*].kinesis.powertools_json(powertools_base64(data))` |
| **`SNS`** | `Records[0].Sns.Message | powertools_json(@)` |
| **`SQS`** | `Records[*].powertools_json(body)` |

## Advanced

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10 changes: 7 additions & 3 deletions examples/jmespath_functions/src/extract_data_from_builtin_envelope.py
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@@ -1,12 +1,16 @@
from aws_lambda_powertools import Logger
from aws_lambda_powertools.utilities.jmespath_utils import (
envelopes,
extract_data_from_envelope,
)
from aws_lambda_powertools.utilities.typing import LambdaContext

logger = Logger()


def handler(event: dict, context: LambdaContext) -> dict:
payload = extract_data_from_envelope(data=event, envelope=envelopes.SQS)
customer_id = payload.get("customerId") # now deserialized
records = extract_data_from_envelope(data=event, envelope=envelopes.SQS)
for record in records: # records is a list
logger.info(record.get("customerId")) # now deserialized

return {"customer_id": customer_id, "message": "success", "statusCode": 200}
return {"message": "success", "statusCode": 200}