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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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48
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/*/text.txt"] = fromScript(`document.body.innerText`);
})();
let nextConsoleFh = 0;
let nextConsoleFh = 0; let consoleForFh = {};
router["/tabs/by-id/*/console"] = {
async open({path}) {
const tabId = parseInt(pathComponent(path, -2));
const fh = nextConsoleFh++;
const code = `
(function() {
console.__logs${fh} = [];
console.__logBefore${fh} = console.log;
console.log = (...xs) => {
console.__logBefore${fh}(...xs);
console.__logs${fh}.push(xs);
};
})()
// runs in 'content script' context
var script = document.createElement('script');
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.__logOld(...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 !== ${fh}) return;
chrome.runtime.sendMessage(null, data);
});
`;
consoleForFh[fh] = [];
chrome.runtime.onMessage.addListener(data => {
if (data.fh !== fh) return;
consoleForFh[fh].push(data.xs);
});
await browser.tabs.executeScript(tabId, {code});
return {fh};
},
async read({path, fh}) {
const tabId = parseInt(pathComponent(path, -2));
const code = `console.__logs${fh}.join('\n')`;
const buf = (await browser.tabs.executeScript(tabId, {code}))[0];
const buf = consoleForFh[fh].join('\n');
return { buf };
},
async release({fh}) {
const tabId = parseInt(pathComponent(path, -2));
const code = `
(function() {
console.log = console.__logBefore${fh};
})()
`;
await browser.tabs.executeScript(tabId, {code});
// TODO: clean up everything
return {};
}
};
router["/tabs/by-id/*/eval"] = {
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));
await browser.tabs.executeScript(tabId, {code: buf});
return {size: stringToUtf8Array(buf).length};