chore(codegen): support request compression

[trivikr]

Issue

Internal JS-4242

Description

The codegen change to support request compression when trait is available.

Testing

Test code:

import { strictEqual } from "assert";
import {
  CloudWatch,
  StandardUnit,
} from "../aws-sdk-js-v3/clients/client-cloudwatch/dist-cjs/index.js";

const client = new CloudWatch({});

for (const relation of ["before", "after"]) {
  client.middlewareStack.addRelativeTo(
    (next) => async (args) => {
      const { body } = args.request;
      console.log(`length ${relation} compressionMiddleware`, body.length);
      return next(args);
    },
    {
      relation,
      toMiddleware: "compressionMiddleware",
    }
  );
}

const startTime = Date.now();

const separator = "_";
const Namespace = ["test", startTime].join(separator);
const MetricName = [Namespace, "metric"].join(separator);
const length = 500;

await client.putMetricData({
  Namespace,
  MetricData: Array.from({ length }, (_, i) => ({
    MetricName,
    Unit: StandardUnit.Bytes,
    Value: 1,
  })),
});
const endTime = startTime + length * 1000;

const response = await new CloudWatch().getMetricData({
  StartTime: new Date(startTime),
  EndTime: new Date(endTime),
  MetricDataQueries: Array.from({ length }, (_, i) => ({
    Id: [MetricName, i].join(separator),
    MetricStat: {
      Metric: { Namespace, MetricName },
      Period: 1,
      Stat: "Sum",
      Unit: StandardUnit.Bytes,
    },
  })),
});

strictEqual(response.MetricDataResults?.length, length);
for (const result of response.MetricDataResults) {
  strictEqual(result.Label, MetricName);
}

By default, the request.body is compressed:

$ grep -wns 'CloudWatch({' test.v3.mjs
7:const client = new CloudWatch({});

$ node test.v3.mjs
length before compressionMiddleware 60744
length after compressionMiddleware 4180

The compression is skipped, if explicitly required in client configuration:

$ grep -wns 'CloudWatch({' test.v3.mjs
7:const client = new CloudWatch({ disableRequestCompression: true });

$ node test.v3.mjs
length before compressionMiddleware 60744
length after compressionMiddleware 60744

The compression is skipped if requestMinCompressionSizeBytes does not allow

$ grep -wns 'CloudWatch({' test.v3.mjs
7:const client = new CloudWatch({ requestMinCompressionSizeBytes: 60745 })

$ node test.v3.mjs
length before compressionMiddleware 60744
length after compressionMiddleware 60744

The compression goes through if requestMinCompressionSizeBytes allows

$ grep -wns 'CloudWatch({' test.v3.mjs
7:const client = new CloudWatch({ requestMinCompressionSizeBytes: 60743 });

$ node test.v3.mjs
length before compressionMiddleware 60744
length after compressionMiddleware 4180

Checklist

• If you wrote E2E tests, are they resilient to concurrent I/O?
• If adding new public functions, did you add the @public tag and enable doc generation on the package?

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[trivikr]

This PR was just created for testing.

The requestCompression will be added in clients with a daily update.

[github-actions]

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