To convert a Data URI to a file and then add it to FormData in JavaScript, you can follow these steps:
Parse the Data URI to get the file name, content type, and the actual data. You can use the following code for this:
function parseDataURI(dataURI) {
const matches = dataURI.match(/^data:(.+);base64,(.*)$/);
const file = {
name: "data-uri-file",
type: matches[1],
data: matches[2],
};
return file;
}
Convert the data to a Blob object using the atob()
function to decode the base64-encoded data, and create a new Blob object from the decoded data. You can use the following code for this:
function dataURIToBlob(dataURI) {
const byteString = atob(dataURI.split(",")[1]);
const mimeString = dataURI.split(",")[0].split(":")[1].split(";")[0];
const ab = new ArrayBuffer(byteString.length);
const ia = new Uint8Array(ab);
for (let i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ab], { type: mimeString });
}
Create a new FormData object, append the converted file, and then use it to make an AJAX request. You can use the following code for this:
const dataURI = "data:image/png;base64,iVBORw0KG...";
const file = parseDataURI(dataURI);
const blob = dataURIToBlob(dataURI);
const formData = new FormData();
formData.append("file", blob, file.name);
const xhr = new XMLHttpRequest();
xhr.open("POST", "/upload", true);
xhr.onload = function () {
if (xhr.status === 200) {
console.log("File uploaded successfully.");
} else {
console.log("Error uploading file.");
}
};
xhr.send(formData);
This code will convert the Data URI to a file and then add it to FormData, which can then be sent to the server using an AJAX request.
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Asked: 2023-05-27 14:50:50 +0000
Seen: 8 times
Last updated: May 27 '23
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