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Fix body.html for larger files and UTF-8 contents.

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This commit is contained in:
Hagen Fritsch 2023-02-26 19:50:19 +01:00
parent 09d57f94b5
commit 5c519a15c2
1 changed files with 28 additions and 2 deletions
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30
extension/background.js
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@ -61,6 +61,26 @@ const utf8ArrayToString = (function() {
return utf8 => decoder.decode(utf8);
})();
// btoa cannot be used on Uint8Arrays or strings containing utf8 characters.
// This is the best solution per https://stackoverflow.com/a/66046176
const utf8ArrayToBase64 = async (data) => {
if(data.length == 0) return '';
// Use a FileReader to generate a base64 data URI
const base64url = await new Promise((r) => {
const reader = new FileReader()
reader.onload = () => r(reader.result)
reader.readAsDataURL(new Blob([data]))
});
/*
The result looks like
"data:application/octet-stream;base64,<your base64 data>",
so we split off the beginning:
*/
return base64url.split(",", 2)[1]
};
// global so it can be hot-reloaded
window.Routes = {};
@ -127,7 +147,7 @@ const makeRouteWithContents = (function() {
return { fh: Cache.storeObject(req.path, toUtf8Array(data)) };
},
async read({fh, size, offset}) {
return { buf: String.fromCharCode(...Cache.getObjectForHandle(fh).slice(offset, offset + size)) };
return { buf: Cache.getObjectForHandle(fh).slice(offset, offset + size) };
},
async write(req) {
const {fh, offset, buf} = req;
@ -919,7 +939,13 @@ async function onMessage(req) {
const [route, vars] = tryMatchRoute(req.path);
response = await route[req.op]({...req, ...vars});
response.op = req.op;
if (response.buf) { response.buf = btoa(response.buf); }
if (response.buf) {
if (response.buf instanceof Uint8Array) {
response.buf = await utf8ArrayToBase64(response.buf);
} else {
response.buf = btoa(response.buf);
}
}
} catch (e) {
console.error(e);