SMI: Method works in dev but not in prod

[djrlscode (D J)]

Hey all! I’m having a bit of a weird issue and wondering if somebody has experience with this.
I have a SMI function that downloads something with axios as an arraybuffer and then uploads it to an AWS S3 bucket. This works great when I test it using fdk run. When I fdk pack the app and test the app there, I get the following error (I can see it when I go to the custom app > View Log) :

An error occurred while uploading the file: Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client at new NodeError (node:internal/errors:399:5) at ClientRequest.setHeader (node:_http_outgoing:645:11) at protocols.<computed>.request (/opt/framework/index.js:53:13) at /var/task/developer/node_modules/@aws-sdk/node-http-handler/dist-cjs/node-http-handler.js:72:25 at new Promise (<anonymous>) at NodeHttpHandler.handle (/var/task/developer/node_modules/@aws-sdk/node-http-handler/dist-cjs/node-http-handler.js:51:16) at process.processTicksAndRejections (node:internal/process/task_queues:95:5) at async /var/task/developer/node_modules/@aws-sdk/middleware-serde/dist-cjs/deserializerMiddleware.js:5:26 { code: 'ERR_HTTP_HEADERS_SENT', '$metadata': { attempts: 1, totalRetryDelay: 0 } }

The piece of code that throws the error is the uploading with the s3Client, and it looks like this:

console.log("Sending upload command...");
      
      const uploadCommand = new PutObjectCommand({
        Bucket: options.iparams.recordingBucketName,
        Key: key,
        Body: recordingFile,
      });

      s3Client
        .send(uploadCommand)
        .then((response) => {
          console.log("File uploaded successfully!", response);
        })
        .catch((error) => {
          console.error("An error occurred while uploading the file:", error);
        });

      console.log("File uploaded successfully.");

Does anybody have any idea why this would happen?

Edit 1: I also just double checked if all my iparams and variables are correct. I thought maybe there was a problem there, but they all are correct in the SMI function.

[djrlscode (D J)]

Update:

  const s3Client = new S3Client({
        region: options.iparams.recordingBucketRegionAWS,
        credentials: {
          accessKeyId: options.iparams.recordingBucketAccessKey,
          secretAccessKey: options.iparams.recordingBucketSecretKey,
        },
      });
        let resaws = await s3Client.send(new ListObjectsV2Command({ Bucket: options.iparams.recordingBucketName }));
         console.log("AWS S3 access is available.", resaws);
       } catch (error) {
         console.error("Unable to access AWS S3:", error);
       }

A get to the bucket seems to work. So something is going wrong with the upload only. No clue what it is yet and im still looking further.

[djrlscode (D J)]

Solved this by generating a POST pre signed url using the aws-cdk lib, and then posting with Axios since I had that in the code anyway. Not the best solution but works for now.