Encountering a problem where image uploads to an s3 bucket are not successful. The error message received is:
API resolved without sending a response for /api/upload/uploadPhoto, this may result in stalled requests.
The front end includes an input that can accept multiple files (mainly images), which are then stored in event.target.files.
A function saves each file in a state array, and on submit, it sends a post request to the next.js API.
Front-end logic:
The handleListingPhotos function automatically adds photos to the listingPhotos state when uploaded:
const handleListingPhotos = async (e: any) => {
setMessage(null);
let file = e.target.files;
console.log("hello", file);
for (let i = 0; i < file.length; i++) {
const fileType = file[i]["type"];
const validImageTypes = ["image/jpeg", "image/png"];
if (validImageTypes.includes(fileType)) {
setListingPhotos((prev: any) => {
return [...prev, file[i]];
});
} else {
setMessage("Only images are accepted");
}
}
};
Once the photos are stored, their data can be viewed in the browser's console.log. When onSubmit triggers the POST API:
const handleSubmit = async (e: any) => {
e.preventDefault();
const formData = new FormData();
formData.append("files[]", listingPhotos);
await fetch(`/api/upload/uploadPhoto`, {
method: "POST",
headers: { "Content-Type": "multipart/form-data" },
body: formData,
}).then((res) => res.json());
};
console.log("listingphotos:", listingPhotos);
However, the issue arises when logging req.body in the S3 Bucket upload process, showing information like:
req.body ------WebKitFormBoundarydsKofVokaJRIbco1
Content-Disposition: form-data; name="files[]"
[object File][object File][object File][object File]
------WebKitFormBoundarydsKofVokaJRIbco1--
api/upload/UploadPhoto logic:
import { NextApiRequest, NextApiResponse } from "next";
const AWS = require("aws-sdk");
const access = {
accessKeyId: process.env.AWS_ACCESS_KEY_ID as string,
secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY as string,
};
// creates an S3 Client
const s3 = new AWS.S3({ region: "region", credentials: access });
export default async function uploadPhoto(
req: NextApiRequest,
res: NextApiResponse
) {
// take info from parent page
// console.log("req.body: ", req.body);
if (req.method === "POST") {
console.log("req.body", req.body);
let body = req.body;
let headers = req.headers;
let contentType = headers["Content-Type"] || headers["content-type"];
// check for correct content-type
if (!contentType.startsWith("multipart/form-data")) {
return { statusCode: 400, body: "Invalid content type" };
}
let boundary = contentType.replace("multipart/form-data; boundary=", "");
let parts = body.split(boundary);
for (let part of parts) {
if (part.startsWith("Content-Disposition")) {
let [fileData] = part.split("\r\n\r\n");
fileData = fileData.slice(0, -2);
let [fileName] = part.split("filename=");
fileName = fileName.slice(1, -1);
let params = {
Bucket: "RANDOM BUCKET NAME",
Key: fileName,
Body: fileData,
ContentType: { "image/png": "image/jpg" },
};
// Need to set the PARAMS for the upload
await s3.putObject(params);
console.log(
"Successfully uploaded object: " + params.Bucket + "/" + params.Key
);
}
}
return {
statusCode: 200,
body: "File uploaded",
};
// Uploads the files to S3
}
}