init: extract mobile app from bincio_activity
Expo/React Native app with local SQLite archive and bincio-activity sync.
This commit is contained in:
Davide Scaini
@@ -0,0 +1,248 @@
|
||||
import { StyleSheet } from 'react-native';
|
||||
import WebView from 'react-native-webview';
|
||||
import { handleWebViewMessage, pyodideRef } from './extractActivity';
|
||||
|
||||
const CDN = 'https://cdn.jsdelivr.net/pyodide/v0.26.4/full/';
|
||||
// v0.18.1: last version whose JS wrapper avoids ??, ?., and other syntax
|
||||
// unavailable on Chrome <80 (e.g. Karoo WebView 61). Used in the compat path.
|
||||
const CDN_COMPAT = 'https://cdn.jsdelivr.net/pyodide/v0.18.1/full/';
|
||||
|
||||
// Python snippets embedded as JSON strings to avoid any JS/TS escaping issues.
|
||||
const PY_INSTALL_PACKAGES = [
|
||||
'import micropip',
|
||||
'await micropip.install(["fitdecode", "gpxpy"])',
|
||||
].join('\n');
|
||||
|
||||
// emfs:// is Pyodide's Emscripten-FS URL scheme — the only reliable way to
|
||||
// install a wheel from bytes without an http/https URL (blob: URLs are not
|
||||
// recognised by micropip and cause an InvalidRequirement parse error).
|
||||
// _wheel_path is set as a Pyodide global before this runs.
|
||||
const PY_INSTALL_WHEEL = [
|
||||
'import micropip',
|
||||
'await micropip.install("emfs://" + _wheel_path, deps=False)',
|
||||
].join('\n');
|
||||
|
||||
const PY_EXTRACT = [
|
||||
'import json, shutil',
|
||||
'from pathlib import Path',
|
||||
'from bincio.extract.parsers.factory import parse_file',
|
||||
'from bincio.extract.metrics import compute',
|
||||
'from bincio.extract.writer import make_activity_id, write_activity',
|
||||
'',
|
||||
'outdir = Path("/tmp/bincio_out")',
|
||||
'if outdir.exists(): shutil.rmtree(outdir)',
|
||||
'outdir.mkdir()',
|
||||
'',
|
||||
'activity = parse_file(Path("/tmp/" + _filename))',
|
||||
'metrics = compute(activity)',
|
||||
'write_activity(activity, metrics, outdir, privacy="public", rdp_epsilon=0.0001)',
|
||||
'act_id = make_activity_id(activity)',
|
||||
'',
|
||||
'detail_path = outdir / "activities" / (act_id + ".json")',
|
||||
'ts_path = outdir / "activities" / (act_id + ".timeseries.json")',
|
||||
'geojson_path = outdir / "activities" / (act_id + ".geojson")',
|
||||
'',
|
||||
'# write_activity in the installed wheel silently skips timeseries — write it directly.',
|
||||
'if not ts_path.exists():',
|
||||
' from bincio.extract.timeseries import build_timeseries as _bts',
|
||||
' _ts = _bts(activity.points, activity.started_at, "public")',
|
||||
' if _ts.get("t"):',
|
||||
' ts_path.write_text(json.dumps(_ts))',
|
||||
'',
|
||||
'json.dumps({',
|
||||
' "id": act_id,',
|
||||
' "detail": json.loads(detail_path.read_text()),',
|
||||
' "timeseries": json.loads(ts_path.read_text()) if ts_path.exists() else None,',
|
||||
' "geojson": json.loads(geojson_path.read_text()) if geojson_path.exists() else None,',
|
||||
'})',
|
||||
].join('\n');
|
||||
|
||||
// JSON.stringify gives us safely-quoted JS string literals for embedding in HTML.
|
||||
const PYODIDE_HTML = `<!DOCTYPE html>
|
||||
<html><head><meta charset="utf-8"></head>
|
||||
<body>
|
||||
<script>
|
||||
var _PY_INSTALL_PACKAGES = ${JSON.stringify(PY_INSTALL_PACKAGES)};
|
||||
var _PY_INSTALL_WHEEL = ${JSON.stringify(PY_INSTALL_WHEEL)};
|
||||
var _PY_EXTRACT = ${JSON.stringify(PY_EXTRACT)};
|
||||
var _CDN = ${JSON.stringify(CDN)};
|
||||
var _CDN_COMPAT = ${JSON.stringify(CDN_COMPAT)};
|
||||
|
||||
function _post(m) { window.ReactNativeWebView.postMessage(JSON.stringify(m)); }
|
||||
|
||||
var pyodide = null;
|
||||
var packagesReady = false;
|
||||
var wheelReady = false;
|
||||
var initError = null;
|
||||
|
||||
(async function init() {
|
||||
try {
|
||||
// WebAssembly.Global was added in Chrome 69. Without it Pyodide cannot
|
||||
// initialise on any version. Bail out immediately so the mobile app can
|
||||
// fall back to server-side extraction without attempting a 35 MB download.
|
||||
if (typeof WebAssembly === 'undefined' || typeof WebAssembly.Global === 'undefined') {
|
||||
_post({ type: 'engine_unavailable', reason: 'wasm_global' });
|
||||
return;
|
||||
}
|
||||
|
||||
_post({ type: 'progress', msg: 'Loading Python runtime…' });
|
||||
|
||||
// Chrome <80 is missing features that modern Pyodide uses in its JS wrapper:
|
||||
// Chrome <71: no globalThis → factory throws ReferenceError immediately
|
||||
// Chrome <63: no dynamic import() / for-await-of → parse/runtime failure
|
||||
// Detection: read Chrome version from UA; absent means non-Chrome (assume modern).
|
||||
var _chromeVer = (navigator.userAgent.match(/Chrome\\/([0-9]+)/) || [])[1];
|
||||
var _needsPatch = _chromeVer && parseInt(_chromeVer) < 80;
|
||||
|
||||
if (_needsPatch) {
|
||||
// Use v0.18.1 — its JS wrapper avoids ??, ?., and other Chrome-80+ syntax.
|
||||
// Then apply three text patches before injecting via Blob URL (Blob scripts
|
||||
// bypass the browser's module pre-scanner, so patched keywords are invisible).
|
||||
//
|
||||
// Patches (split/join avoids regex escapes, which template literals corrupt):
|
||||
// 1. globalThis polyfill prepended — Chrome <71 lacks globalThis entirely
|
||||
// 2. import( → __loadScript( — Chrome <63 cannot parse dynamic import
|
||||
// 3. for await( → for( — Chrome <63 lacks async iteration;
|
||||
// the only affected fn (getFsHandles/NativeFS) is never called by us
|
||||
window.__loadScript = function(url) {
|
||||
return new Promise(function(res, rej) {
|
||||
var s = document.createElement('script');
|
||||
s.src = url;
|
||||
s.onload = res;
|
||||
s.onerror = function() { rej(new Error('Failed to load ' + url)); };
|
||||
document.head.appendChild(s);
|
||||
});
|
||||
};
|
||||
var _pyResp = await fetch(_CDN_COMPAT + 'pyodide.js');
|
||||
if (!_pyResp.ok) throw new Error('Could not fetch pyodide.js (' + _pyResp.status + ')');
|
||||
var _pyCode = await _pyResp.text();
|
||||
_pyCode = 'var globalThis=typeof globalThis!=="undefined"?globalThis:self;\\n' + _pyCode;
|
||||
_pyCode = _pyCode.split('import(').join('__loadScript(');
|
||||
_pyCode = _pyCode.split('for await(').join('for(');
|
||||
await new Promise(function(res, rej) {
|
||||
var blob = new Blob([_pyCode], { type: 'application/javascript' });
|
||||
var blobUrl = URL.createObjectURL(blob);
|
||||
var s = document.createElement('script');
|
||||
s.src = blobUrl;
|
||||
s.onload = function() { URL.revokeObjectURL(blobUrl); res(); };
|
||||
s.onerror = function() { URL.revokeObjectURL(blobUrl); rej(new Error('Failed to inject patched pyodide.js')); };
|
||||
document.head.appendChild(s);
|
||||
});
|
||||
pyodide = await loadPyodide({ indexURL: _CDN_COMPAT });
|
||||
} else {
|
||||
await new Promise(function(res, rej) {
|
||||
var s = document.createElement('script');
|
||||
s.src = _CDN + 'pyodide.js';
|
||||
s.onload = res; s.onerror = rej;
|
||||
document.head.appendChild(s);
|
||||
});
|
||||
pyodide = await loadPyodide({ indexURL: _CDN });
|
||||
}
|
||||
|
||||
_post({ type: 'progress', msg: 'Loading packages…' });
|
||||
await pyodide.loadPackage(['lxml', 'pyyaml', 'micropip']);
|
||||
|
||||
_post({ type: 'progress', msg: 'Installing fitdecode, gpxpy…' });
|
||||
await pyodide.runPythonAsync(_PY_INSTALL_PACKAGES);
|
||||
|
||||
packagesReady = true;
|
||||
_post({ type: 'pyodide_ready' });
|
||||
} catch(e) {
|
||||
initError = String(e);
|
||||
_post({ type: 'init_error', message: initError });
|
||||
}
|
||||
})();
|
||||
|
||||
window._bincioExtract = async function(params) {
|
||||
var reqId = params.reqId;
|
||||
var filename = params.filename;
|
||||
var base64 = params.base64;
|
||||
var wheelBase64 = params.wheelBase64; // pre-fetched by React Native (avoids ATS/HTTP issues)
|
||||
var wheelFilename = params.wheelFilename; // e.g. "bincio-0.1.0-py3-none-any.whl"
|
||||
|
||||
function post(m) { _post(Object.assign({}, m, { reqId: reqId })); }
|
||||
|
||||
try {
|
||||
// Wait for base packages if still loading
|
||||
if (!packagesReady && !initError) {
|
||||
await new Promise(function(res, rej) {
|
||||
var n = 0;
|
||||
var id = setInterval(function() {
|
||||
if (packagesReady) { clearInterval(id); res(undefined); }
|
||||
else if (initError) { clearInterval(id); rej(new Error(initError)); }
|
||||
else if (++n > 300) { clearInterval(id); rej(new Error('Pyodide init timed out')); }
|
||||
}, 200);
|
||||
});
|
||||
}
|
||||
if (initError) throw new Error(initError);
|
||||
|
||||
// Install bincio wheel on first extraction.
|
||||
// Wheel bytes arrive pre-fetched from React Native (avoids ATS/HTTP issues).
|
||||
// Write to Pyodide's Emscripten FS so micropip can install via emfs:// URL
|
||||
// (blob: URLs are not recognised by micropip — they cause an InvalidRequirement error).
|
||||
if (!wheelReady) {
|
||||
post({ type: 'progress', msg: 'Loading Bincio…' });
|
||||
var wheelBytes = Uint8Array.from(atob(wheelBase64), function(c) { return c.charCodeAt(0); });
|
||||
var wheelPath = '/tmp/' + wheelFilename;
|
||||
pyodide.FS.writeFile(wheelPath, wheelBytes);
|
||||
pyodide.globals.set('_wheel_path', wheelPath);
|
||||
await pyodide.runPythonAsync(_PY_INSTALL_WHEEL);
|
||||
wheelReady = true;
|
||||
}
|
||||
|
||||
post({ type: 'progress', msg: 'Extracting…' });
|
||||
|
||||
// Decode base64 file bytes and write to Pyodide's virtual filesystem
|
||||
var bytes = Uint8Array.from(atob(base64), function(c) { return c.charCodeAt(0); });
|
||||
pyodide.FS.writeFile('/tmp/' + filename, bytes);
|
||||
|
||||
// SHA-256 of original file bytes (replaces the stub source_hash)
|
||||
var hashBuf = await crypto.subtle.digest('SHA-256', bytes.buffer);
|
||||
var sourceHash = Array.from(new Uint8Array(hashBuf))
|
||||
.map(function(b) { return b.toString(16).padStart(2, '0'); })
|
||||
.join('');
|
||||
|
||||
// Run the bincio extraction pipeline
|
||||
pyodide.globals.set('_filename', filename);
|
||||
var resultJson = await pyodide.runPythonAsync(_PY_EXTRACT);
|
||||
var result = JSON.parse(resultJson);
|
||||
|
||||
_post({
|
||||
type: 'result',
|
||||
reqId: reqId,
|
||||
id: result.id,
|
||||
detail: result.detail,
|
||||
timeseries: result.timeseries,
|
||||
geojson: result.geojson,
|
||||
sourceHash: sourceHash,
|
||||
});
|
||||
} catch(e) {
|
||||
_post({ type: 'error', reqId: reqId, message: e.message || String(e) });
|
||||
}
|
||||
};
|
||||
</script>
|
||||
</body></html>`;
|
||||
|
||||
export function PyodideWebView() {
|
||||
return (
|
||||
<WebView
|
||||
ref={pyodideRef}
|
||||
source={{ html: PYODIDE_HTML, baseUrl: 'https://localhost' }}
|
||||
style={styles.hidden}
|
||||
onMessage={handleWebViewMessage}
|
||||
javaScriptEnabled
|
||||
originWhitelist={['*']}
|
||||
/>
|
||||
);
|
||||
}
|
||||
|
||||
const styles = StyleSheet.create({
|
||||
// Off-screen but still rendered — display:none / opacity:0 can suppress JS on some platforms.
|
||||
hidden: {
|
||||
position: 'absolute',
|
||||
top: -2000,
|
||||
left: 0,
|
||||
width: 1,
|
||||
height: 1,
|
||||
},
|
||||
});
|
||||
Reference in New Issue
Block a user