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continuing work on console. it can print stuff in tail -f!

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This commit is contained in:
Omar Rizwan 2020-12-30 18:57:01 -08:00
parent 77c79a8f83
commit b09951ebc2
1 changed files with 30 additions and 18 deletions
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44
extension/background.js
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@ -228,43 +228,55 @@ router["/tabs/by-id"] = {
router["/tabs/by-id/*/title.txt"] = withTab(tab => tab.title + "\n"); router["/tabs/by-id/*/title.txt"] = withTab(tab => tab.title + "\n");
router["/tabs/by-id/*/text.txt"] = fromScript(`document.body.innerText`); router["/tabs/by-id/*/text.txt"] = fromScript(`document.body.innerText`);
})(); })();
let nextConsoleFh = 0; let nextConsoleFh = 0; let consoleForFh = {};
router["/tabs/by-id/*/console"] = { router["/tabs/by-id/*/console"] = {
async open({path}) { async open({path}) {
const tabId = parseInt(pathComponent(path, -2)); const tabId = parseInt(pathComponent(path, -2));
const fh = nextConsoleFh++; const fh = nextConsoleFh++;
const code = ` const code = `
(function() { // runs in 'content script' context
console.__logs${fh} = []; var script = document.createElement('script');
console.__logBefore${fh} = console.log; var code = document.createTextNode(\`
// runs in real Web page context (this is where we want to hook console.log)
(function() {
if (!console.__logOld) console.__logOld = console.log;
console.log = (...xs) => { console.log = (...xs) => {
console.__logBefore${fh}(...xs); console.__logOld(...xs);
console.__logs${fh}.push(xs); // TODO: use random event for security instead of this broadcast
window.postMessage({fh: ${fh}, xs: xs}, '*');
}; };
})() })()
\`);
script.appendChild(code);
(document.body || document.head).appendChild(script);
window.addEventListener('message', function({data}) {
if (data.fh !== ${fh}) return;
chrome.runtime.sendMessage(null, data);
});
`; `;
consoleForFh[fh] = [];
chrome.runtime.onMessage.addListener(data => {
if (data.fh !== fh) return;
consoleForFh[fh].push(data.xs);
});
await browser.tabs.executeScript(tabId, {code}); await browser.tabs.executeScript(tabId, {code});
return {fh}; return {fh};
}, },
async read({path, fh}) { async read({path, fh}) {
const tabId = parseInt(pathComponent(path, -2)); const buf = consoleForFh[fh].join('\n');
const code = `console.__logs${fh}.join('\n')`;
const buf = (await browser.tabs.executeScript(tabId, {code}))[0];
return { buf }; return { buf };
}, },
async release({fh}) { async release({fh}) {
const tabId = parseInt(pathComponent(path, -2)); const tabId = parseInt(pathComponent(path, -2));
const code = ` // TODO: clean up everything
(function() {
console.log = console.__logBefore${fh};
})()
`;
await browser.tabs.executeScript(tabId, {code});
return {}; return {};
} }
}; };
router["/tabs/by-id/*/eval"] = { router["/tabs/by-id/*/eval"] = {
async write({path, buf}) { async write({path, buf}) {
// FIXME: chunk this properly (like if they write a script in
// multiple chunks) and only execute when ready?
const tabId = parseInt(pathComponent(path, -2)); const tabId = parseInt(pathComponent(path, -2));
await browser.tabs.executeScript(tabId, {code: buf}); await browser.tabs.executeScript(tabId, {code: buf});
return {size: stringToUtf8Array(buf).length}; return {size: stringToUtf8Array(buf).length};