Allow express body-parser to deal with missing content-type headers

no-content-type.js

// I was dealing with such an issue, where there was no content-type
// curl --upload-file '/Users/myuser/Movies/VID-20171025.mp4' -H  http://localhost:3000/api/upload/path/to/myfile.xyz

const bodyParser = require('body-parser');

function req(req, res, next) {
    const fileName = req.params.name;
  
    if (Buffer.isBuffer(req.body)) {
        fs.writeFileAsync("/tmp/" + fileName, req.body)
            .then(() => {            
                console.log("The file was saved!");
            })
            .catch((err) => {
                next(err);
            });
    } else {
        console.log('body is not a buffer');
    }
}

function initEndpoints (app) {
    const rawParser = () => {
        const parse = bodyParser.raw({ limit: '20mb' });
        return function (req, res, next) {
            if (!req.headers['content-type']) {
                req.headers['content-type'] = 'application/octet-stream';
            }
            parse(req, res, next);
        }
    };
  
    app.put('/api/upload/*/:name', rawParser(), this.uploadRaw.bind(this)); 
}

// alternatively, where you want to treat this as an error:

function initEndpoints (app) {
    const rawParser = () => {
        const parse = bodyParser.raw({ limit: '20mb' });
        return function (req, res, next) {
            if (!req.headers['content-type']) {
                throw new Error('Missing content-type header');
            }
            parse(req, res, next);
        }
    };
  
    app.put('/api/upload/*/:name', rawParser(), this.uploadRaw.bind(this)); 
}