Class AWS2LambdaPlugin

src/plugins/AWS2LambdaPlugin.ts:31–98

import { getAWS, execute } from '../aws/SDK2';

class AWS2LambdaPlugin implements SwPlugin {
  readonly module = 'aws-sdk';
  readonly versions = '2.*';

  install(installer: PluginInstaller): void {
    const AWS = getAWS(installer);
    const _Lambda = AWS.Lambda;

    function Lambda(this: any) {
      const lambda = _Lambda.apply(this, arguments);
      const _invoke = lambda.invoke;

      lambda.invoke = function (params: any, callback: any) {
        if (params.InvocationType === 'DryRun') return _invoke.call(this, params, callback);

        let funcName = params.FunctionName;
        const li = funcName.lastIndexOf(':');
        let name;

        if (li === -1) name = funcName;
        else {
          // my-function:v1
          if (funcName.indexOf(':') === -1) name = funcName.slice(li);
          else name = funcName.slice(li + 1); // 123456789012:function:my-function, arn:aws:lambda:us-west-2:123456789012:function:my-function
        }

        const span = ContextManager.current.newExitSpan(
          `AWS/Lambda/invoke/${name || ''}`,
          Component.AWSLAMBDA_FUNCTION,
          Component.HTTP,
        );

        span.component = Component.AWSLAMBDA_FUNCTION;
        span.layer = SpanLayer.HTTP;

        if (li !== -1) span.tag(Tag.arn(funcName));

        if (config.awsLambdaChain) {
          let payload = params.Payload;

          if (payload instanceof Buffer) payload = payload.toString();

          if (typeof payload === 'string') {
            const traceid = JSON.stringify(`${span.inject().value}/${hostname()}`);
            const keyTrace = JSON.stringify(KeyTrace);
            const keyParams = JSON.stringify(KeyParams);

            if (payload.match(/^\s*{\s*}\s*$/)) payload = `{${keyTrace}:${traceid}}`;
            else if (payload.match(/^\s*{/))
              payload = `{${keyTrace}:${traceid},${payload.slice(payload.indexOf('{') + 1)}`;
            else payload = `{${keyTrace}:${traceid},${keyParams}:${payload}}`;

            params = Object.assign({}, params, { Payload: payload });
          }
        }

        return execute(span, this, _invoke, params, callback);
      };