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extension: Naming, factor out debugTab, add snapshot+screenshot.

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This commit is contained in:
Omar Rizwan 2019-02-28 01:38:22 -08:00
parent bc3b35487d
commit aa3ac637ee
1 changed files with 33 additions and 11 deletions
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44
extension/background.js
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@ -31,6 +31,13 @@ function queryTabs() {
return new Promise((resolve, reject) => chrome.tabs.query({}, resolve));
}
async function debugTab(tabId) {
if (!debugged[tabId]) {
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.3", resolve));
debugged[tabId] = 0;
}
debugged[tabId] += 1;
}
function sendDebuggerCommand(tabId, method, commandParams) {
return new Promise((resolve, reject) =>
chrome.debugger.sendCommand({tabId}, method, commandParams, result => {
@ -115,27 +122,42 @@ const router = {
return (tab.title + "\n").substr(offset, size);
}
},
"document.body.innerText.txt": {
"text": {
async read(path, fh, size, offset) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) {
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.3", resolve));
debugged[tabId] = 0;
}
debugged[tabId] += 1;
await debugTab(tabId);
await sendDebuggerCommand(tabId, "Runtime.enable", {});
const {result} = await sendDebuggerCommand(tabId, "Runtime.evaluate", {expression: "document.body.innerText", returnByValue: true});
return result.value.substr(offset, size)
}
},
"snapshot.mhtml": {
async read(path, fh, size, offset) {
const tabId = parseInt(pathComponent(path, -2));
await debugTab(tabId);
await sendDebuggerCommand(tabId, "Page.enable", {});
const {data} = await sendDebuggerCommand(tabId, "Page.captureSnapshot");
return data.substr(offset, size)
}
},
"screenshot.png": {
// Broken. Filesystem hangs (? in JS?) and needs to be killed if you read this.
async read(path, fh, size, offset) {
const tabId = parseInt(pathComponent(path, -2));
await debugTab(tabId);
await sendDebuggerCommand(tabId, "Page.enable", {});
const {data} = await sendDebuggerCommand(tabId, "Page.captureScreenshot");
const buf = btoa(atob(data).substr(offset, size));
return { buf, base64Encoded: true };
}
},
"resources": {
async opendir(path) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) {
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.3", resolve));
debugged[tabId] = 0;
}
debugged[tabId] += 1;
await debugTab(tabId);
return 0;
},
async readdir(path) {