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extension: Can read (some) resources in tree/ now!

Browse source 
Also clean up some dead code.
This commit is contained in:
Omar Rizwan 2019-02-25 23:08:52 -08:00
parent 9f235eb438
commit 74c794d75c
1 changed files with 42 additions and 25 deletions
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67
extension/background.js
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@ -30,29 +30,19 @@ function queryTabs() {
return new Promise((resolve, reject) => chrome.tabs.query({}, resolve));
}
function sendDebuggerCommand(tab, method, commandParams) {
return new Promise(resolve => chrome.debugger.sendCommand({tabId: id}, method, commandParams, resolve));
function sendDebuggerCommand(tabId, method, commandParams) {
return new Promise((resolve, reject) =>
chrome.debugger.sendCommand({tabId}, method, commandParams, result => {
console.log(method, result);
if (result) {
resolve(result);
} else {
reject(chrome.runtime.lastError);
}
})
);
}
const fhManager = (function() {
const handles = {};
let nextFh = 0;
return {
allocate(obj) { // -> fh
const fh = nextFh++;
handles[fh] = obj;
return fh;
},
ref(fh) {
if (!handles[fh]) throw new UnixError(unix.EIO);
return handles[fh];
},
free(fh) {
delete handles[fh];
}
};
})();
// tabs/by-id/ID/title
// tabs/by-id/ID/url
// tabs/by-id/ID/console
@ -68,6 +58,9 @@ function pathComponent(path, i) {
const components = path.split('/');
return components[i >= 0 ? i : components.length + i];
}
function sanitize(s) {
return s.replace(/[^A-Za-z0-9_\-\.]/gm, '_');
}
const debugged = {};
@ -103,7 +96,7 @@ const router = {
async opendir(path) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) {
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.2", resolve));
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.3", resolve));
debugged[tabId] = 0;
}
debugged[tabId] += 1;
@ -112,12 +105,35 @@ const router = {
async readdir(path) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) throw new UnixError(unix.EIO);
const result = await new Promise(resolve => chrome.debugger.sendCommand({tabId}, "Page.getResourceTree", {}, resolve));
const frameTree = result.frameTree;
return frameTree.resources.map(r => String(r.contentSize));
const {frameTree} = await sendDebuggerCommand(tabId, "Page.getResourceTree", {});
return frameTree.resources.map(r => sanitize(String(r.url).slice(0, 200)));
},
async releasedir(path) {
return 0;
},
"*": {
async read(path, fh, size, offset) {
const tabId = parseInt(pathComponent(path, -3));
const suffix = pathComponent(path, -1);
if (!debugged[tabId]) throw new UnixError(unix.EIO);
await sendDebuggerCommand(tabId, "Page.enable", {});
const {frameTree} = await sendDebuggerCommand(tabId, "Page.getResourceTree", {});
for (let resource of frameTree.resources) {
const resourceSuffix = sanitize(String(resource.url).slice(0, 200));
if (resourceSuffix === suffix) {
const {content} = await sendDebuggerCommand(tabId, "Page.getResourceContent", {
frameId: frameTree.frame.id,
url: resource.url
});
return content.substr(offset, size);
}
}
}
}
}
}
@ -239,6 +255,7 @@ async function onmessage(event) {
response = { op: 'releasedir' };
}
} catch (e) {
console.error(e);
response = {
op: req.op,
error: e instanceof UnixError ? e.error : unix.EIO