[英]convert base64 string to usable URL
I have a string that was made using toDataURL() on my HTML canvas, creating an image.我在我的 HTML 画布上使用 toDataURL() 创建了一个字符串,创建了一个图像。 I'd like to be able to encode / decode that string so it can be used with window.open(string)
我希望能够对该字符串进行编码/解码,以便它可以与 window.open(string) 一起使用
string looks like字符串看起来像
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAB4AAAAOfCAYAAAApbd6bAAAgAElEQVR4Xuzdfaxt6V0X8OHct5nplEHQUFobiJEWakwNiRKjmIqJBQShCS...
This is what ended up working for me, with src being the base64 string这最终对我有用, src 是 base64 字符串
const openImg = () => {
const base64ImageData = src;
const contentType = 'image/png';
const byteCharacters = atob(base64ImageData.substr(`data:${contentType};base64,`.length));
const byteArrays = [];
for (let offset = 0; offset < byteCharacters.length; offset += 1024) {
const slice = byteCharacters.slice(offset, offset + 1024);
const byteNumbers = new Array(slice.length);
for (let i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
const blob = new Blob(byteArrays, { type: contentType });
const blobUrl = URL.createObjectURL(blob);
window.open(blobUrl, '_blank');
}
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