joplin/packages/lib/services/rest/routes/resources.ts

import BaseModel from '../../../BaseModel';
import shim from '../../../shim';
import { Request, RequestMethod } from '../Api';
import defaultAction from '../utils/defaultAction';
import { ErrorBadRequest, ErrorNotFound } from '../utils/errors';
import readonlyProperties from '../utils/readonlyProperties';
import ApiResponse from '../ApiResponse';
const Resource = require('../../../models/Resource');

export default async function(request:Request, id:string = null, link:string = null) {
	// fieldName: "data"
	// headers: Object
	// originalFilename: "test.jpg"
	// path: "C:\Users\Laurent\AppData\Local\Temp\BW77wkpP23iIGUstd0kDuXXC.jpg"
	// size: 164394

	if (request.method === 'GET') {
		if (link === 'file') {
			const resource = await Resource.load(id);
			if (!resource) throw new ErrorNotFound();

			const filePath = Resource.fullPath(resource);
			const buffer = await shim.fsDriver().readFile(filePath, 'Buffer');

			const response = new ApiResponse();
			response.type = 'attachment';
			response.body = buffer;
			response.contentType = resource.mime;
			response.attachmentFilename = Resource.friendlyFilename(resource);
			return response;
		}

		if (link) throw new ErrorNotFound();
	}

	if (request.method === RequestMethod.POST) {
		if (!request.files.length) throw new ErrorBadRequest('Resource cannot be created without a file');
		const filePath = request.files[0].path;
		const defaultProps = request.bodyJson(readonlyProperties('POST'));
		return shim.createResourceFromPath(filePath, defaultProps, { userSideValidation: true });
	}

	return defaultAction(BaseModel.TYPE_RESOURCE, request, id, link);
}