Develop Reference

How can I add additional data in FormData when uploading multiple files/folder?

I am trying to upload multiple files/folder from front-end and for some reason In my back-end I want information like - File Name, File Extension, Location of File in the Uploaded Folder and so on..
Now I am able to upload multiple files/folder but my problem comes when I am looping all the selected files to append in FormData(), I also want to append information like - File Name, File Extension, Location of File in the Uploaded Folder, for individual file so that I can identify in my back-end.
this is what I am doing----:
const uploadFolder = document.querySelector('#upload-folder');
uploadFolder.addEventListener('change', async ()=>{
const url = "/home/photos/my-photos/";
let files = uploadFolder.files;
let header = {'Accept': 'application/json', 'X-Requested-With': 'XMLHttpRequest', 'X-CSRFToken': window.CSRF_TOKEN}
let formData = new FormData()
for (const key in files) {
const file = files[key];
if (file.name && file.webkitRelativePath){
const fileExtension = file.name.split(".")[(file.name.split(".").length)-1]
const filePath = file.webkitRelativePath.replace(file.name, "")
formData.append(`file-${key}`, file);
// Here I also want to append fileExtension, filePath, and also name of the file.
// I tried by giving formData.append(`file-${key}`, file, fileExtension, filePath, file.name);
// but unfortunatly it didn't work
}
}
await fetch("/home/photos/my-photos/", {method: "POST", mode: 'same-origin',
headers: header,
body: formData
})
})

You need to call formData.append() for each key you want to add.
For example:
formData.append(`file-${key}-path`, filePath)

When I open a Salesforce Attachment it is downloaded but the pdf is empty

I am getting the attachment body using the Rest API.
var config = {
method: 'get',
url: '<Domanin>/services/data/v48.0/sobjects/Attachment/00PD000000HQD68MAH/Body',
headers: {
'Authorization': `Bearer ${
accessToken
}`,
'content-type':'application/pdf'
},
};
let rawData = await axios(config);
rawData = rawData.data
I am getting the PDF data in this format
%PDF-1.5
%ÓôÌá
1 0 obj
<<
In the client side I am trying to make this as a downloadable file but I am getting blank pdf. The actual pdf contains 2 pages the downloaded pdf contains two pages as well but they are blank.
Client Side Code:
var downloadLink = document.createElement('a');
downloadLink.target = '_blank';
downloadLink.download = 'test.pdf';
// convert downloaded data to a Blob
var blob = new Blob(([rawData]), {type: 'application/pdf'});
// create an object URL from the Blob
var downloadUrl = URL.createObjectURL(blob);
// set object URL as the anchor's href
downloadLink.href = downloadUrl;
// append the anchor to document body
document.body.append(downloadLink);
// fire a click event on the anchor
downloadLink.click();
Please let me know what is wrong with the above logic

Please specify responseType: 'arraybuffer' in request config. Modify your config object to
{
method: 'get',
url: '<Domanin>/services/data/v48.0/sobjects/Attachment/00PD000000HQD68MAH/Body',
headers: {
'Authorization': `Bearer ${
accessToken
}`
},
'responseType': 'arraybuffer'
};

Multipart form Response from NodeJS Server- issue extracting some fields

I have a ReactJS Application that sends an Axios POST request to a NodeJS express server and expects a response with several fields. Specifically, I am using "form-data" in the backend to handle the data streaming.
Here is my backend response.
var FormData = require('form-data');
app.get('/test', (req, res) => {
// create a new form to send all data back to client
var form = new FormData();
form.append('results_log', 'this is text', { contentType: 'text/plain'});
form.append('results_images', fs.createReadStream('./test_results/result.zip'), { contentType: 'application/zip' });
console.log(form);
form.pipe(res);
});
In the frontend, I can download the "results_images" ZIP file from the formdata server response without any issues, but I cannot get the "results_log" field, which is just a simple string. Every attempt has resulted in a "null".
Below is the frontend code.
axios({
url: 'http://localhost:5000/test',
method: 'GET'
})
.then((response) => {
var info = response;
// this alerts NULL
alert(info.data["results_log"]);
const url = window.URL
.createObjectURL(new Blob([info.data["results_images"]]));
const link = document.createElement('a');
link.href = url;
link.setAttribute('download', 'results.zip');
document.body.appendChild(link);
link.click();
})
.catch((error) => console.log(error));
Here is part of the alert of the whole response.data field. As you can see, both fields are present in the response.
Am I doing something wrong when extracting the string field? Any help is appreciated!

Push File Download on Ajax POST Nodejs Express

On Node Server i have this code . Its basically sending the browser POST data to api server and recieves a file as chunk data and the same data is send back to browser via pipe response . But the issue is the api reponse is correct and i can write the file using nodejs locally but it doesnt push download file in browser
router.post('/MyURLOnNODE', function (req, res) {
var MyJsonData = { some Data };
res.writeHead(200, {'Content-disposition': 'attachment; filename=fileArchive.tgz','Content-Type': 'application/force-download'});
try {
request({
url: 'SomeAPI Url', //URL to hit
method: 'POST',
json: MyJsonData
}).pipe(res);
} catch(e) {
console.log("Pipe error",e);
}
console.log("File Streaming Called ",MyJsonData)
}
);
Client Side Code ...This was an attempt to create a blob and use it on urlObject. but the downloaded file is corrupted when i checked in hex.
$http({
method: 'POST',
url: 'MyURLOnNODE',
data: PostData, //forms user object
headers: {
'Content-Type': 'application/json'
}
})
.then(function (data) {
var response=data.data;
var id = Flash.create('success', "Folder Archieved", 5000);
var a = document.getElementById('arch');
a.href = URL.createObjectURL(new Blob([response]));
a.download = "FolderMe.tgz";
a.type='application/octet-stream '
a.click();
}
So is there any solution to this ? either on NodeJs Side or On browser
Update : https://stackoverflow.com/a/7969061/7078299
This thread says its hard to convert an ajax request to download file. So i need to work on client on using urlobject. But blob isnt working with stream data. How to solve it

You can use a node module called file-saver and use saveAs method provided by it and download the file on the client side.
First npm install file-saver;
You can use it as
import {saveAs} from 'file-saver';
and inside your then block you need to add this line
saveAs(new Blob([response]), <your file name>)
It will auto-download your file.

i fixed the issue by adding a reponseType on Client Side Code. Now the blob and ObjectUrl works correctly
$http({
method: 'POST',
url: 'MyUrl',
data: PostData, //forms user object
headers: {
'Content-Type': 'application/json'
},
responseType: 'arraybuffer'
})
.then(function (response) {
console.log(response);
var headers = response.headers();
var blob = new Blob([response.data],{type:headers['content-type']});
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "Archive.tgz";
link.click();
});

Axios download file by the generated filename from the backend

I am using Axios to send POST request to my backend.
The backend generate an Excel file with a name e.g. testing.xlsx.
What I am trying to do:
Doing this file using the same filename generated from the backend and I have tried Postman and everything works fine.
What I have tried:
axios.post(`${env.ENDPOINT}reports/sales/customers_statement`, {
customers_id: form_data.customers_id,
from_date: form_data.from_date,
to_date: form_data.to_date,
},{
responseType: 'blob'
}).then((res) => {
const url = window.URL.createObjectURL(new Blob([res.data]));
const link = document.createElement('a');
const file_name = `${new Date().toISOString().slice(0,10)}.xlsx`; // RENAME HERE
link.href = url;
link.setAttribute('download', file_name);
document.body.appendChild(link);
link.click();
resolve(res.data);
}).catch((e) => {
reject(e);
});
This works fine but it doesn't download the file by the filename generated from the server.
In other words I want to send request to my backend to download the file by the file name already generated from my backend like when I send request using Postman.

It is because you are setting the download attribute to file_name value which is different from the filename server returned
const file_name = `${new Date().toISOString().slice(0,10)}.xlsx`;
Try changing the above to this
const contentDisposition = data.headers['content-disposition'];
const filename = contentDisposition.match(/filename=(?<filename>[^,;]+);/)[0];
link.setAttribute('download', file_name);
In the backend
response.setHeader("Content-disposition", "attachment; filename="+ yourfilenamehere);