Files
2025-02-10 23:27:02 +01:00

37 lines
1.2 KiB
JavaScript

import { Platform } from 'react-native';
export async function fetchText(uri) {
if (!uri) {
return null;
}
if (uri.startsWith('data:image/svg+xml;utf8') && Platform.OS === 'android') {
return dataUriToXml(uri);
} else if (uri.startsWith('data:image/svg+xml;base64')) {
return decodeBase64Image(uri);
} else {
return fetchUriData(uri);
}
}
const decodeBase64Image = uri => {
const decoded = decodeURIComponent(uri);
const splitContent = decoded.split(';')[1].split(',');
const dataType = splitContent[0];
const content = splitContent.slice(1).join(',');
if (typeof Buffer === "undefined") return window.atob(content);
return Buffer.from(content, dataType).toString('utf-8');
};
function dataUriToXml(uri) {
try {
// decode and remove data:image/svg+xml;utf8, prefix
return decodeURIComponent(uri).split(',').slice(1).join(',');
} catch (error) {
throw new Error(`Decoding ${uri} failed with error: ${error}`);
}
}
async function fetchUriData(uri) {
const response = await fetch(uri);
if (response.ok || response.status === 0 && uri.startsWith('file://')) {
return await response.text();
}
throw new Error(`Fetching ${uri} failed with status ${response.status}`);
}
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