Any progress on S3 uploading

[fhackenb]

Any progress or work arounds for the S3 uploading issue? I'm attempting to use this to upload to S3 and I am seeing the issue you mentioned (I hadn't seen that initially)

[fhackenb]

My work around ended up being to follow this guide: https://www.youtube.com/watch?v=BrYJlR0yRnw and switch to this parse-multipart pr: https://github.com/freesoftwarefactory/parse-multipart/pull/7

[djgovani]

Hi, @fhackenb I was facing same S3 uploading issue. Now I solved it. You can refer my repo Hope it'll help you.

[Tory-JohnConnor]

I am facing the same issue. I can not for the life of me get s3 to load a pdf file. It keeps telling me the file can't be opened.

---- update

I was able to resolve this issue using this repo. https://github.com/dudewheresmycode/node-lambda-multipart

NOTE: If using api gateway + SAM FILES you may have to manually deploy the API for the binary media types to take effect.

[noogen]

Thanks @Wolfie010, I was about to pull out all my hairs on this one. Now everything is working as expected.

Before, fields are parsed but corrupted upload image. And when I set to binary for "multipart/form-data", the image works but no fields. I spend an entire day pulling out/losing some hairs on this one.

---- update
Even though 'node-lambda-multipart' works, I ended up just using busboy: https://github.com/niiknow/lambda-form/blob/596e1a663faa01d028f2df16d454e68051b07884/lib/formparser.js#L39

Just reporting that 'busboy' module is also a good alternative.

[tomand285]

Everyone, I figured out a workaround for S3:

exports.handler = function(event, context, callback) {
    console.log(event);
   
    let body = event.body;
    let decodedImage = Buffer.from(body, 'base64');
    event.body = decodedImage.toString('latin1');
   
    let data = multipart.parse(event, true);
     let response = {
        statusCode: 200,
        body: JSON.stringify(data)
    };
   
    callback(null, response);  
};

I also emailed the owner so we can figure out how to incorporate this into the repo

[augustinAJ]

I have solved this issue using binary encoding to create Buffer. The UTF-8 and base64 didn't worked for me.
This is my multipart event parsing function which worked for me which I have used with Busboy.

busboy.on('file', (_fieldname, file, filename, _encoding, mimetype) => {
  const fileContent = {
    content: null,
    filename: null,
    contentType: null
  }
  let chunks;
  file.on('data', data => {
    chunks = data;
  });

  file.on('end', () => {
    const fileData = Buffer.from(chunks, 'binary')
    fileContent.content = fileData;
    fileContent.filename = filename;
    fileContent.contentType = mimetype;
  });
  result.file = fileContent;
});

busboy.on('field', (fieldname, value) => {

    result[fieldname] = value;
});

busboy.on('error', error => reject(error));
busboy.on('finish', () => {
    event.body = result;
    resolve(event);
});

busboy.write(event.body, event.isBase64Encoded ? 'base64' : 'binary');
busboy.end();

[wearenocomputer]

Hi everybody,

This worked for me:

const { PutObjectCommand, S3Client } = require("@aws-sdk/client-s3");
const parser = require('lambda-multipart-parser');

const client = new S3Client({ region: "us-east-1" });

exports.handler = async (event) => {

if (event.isBase64Encoded) {
    //decode base64 to binary
    var buf = Buffer.from(event.body, 'base64');
    event.body = buf;
}

const result = await parser.parse(event, true);

const command = new PutObjectCommand({
    Bucket: "buket-name-here",
    Key: "test.png",
    Body: result.files[0].content,
    ContentType: "image/png"
});

try {
    
    const res  = await client.send(command);
    const response = {
        statusCode: 200,
        body: JSON.stringify({ "Message": "Success", "result":  result.files[0].content }),
    };
    return response;
  
} catch (err) {
   
     const response = {
        statusCode: 200,
        body: JSON.stringify({ "Message": "Fail", "result": err}),
    };
    return response;
}

};