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add a tab update listener to look for taler://

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This commit is contained in:
Sebastian 2022-09-07 12:46:06 -03:00
parent ef1aab5229
commit 2279ee2c39
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GPG Key ID: BE4FF68352439FC1
1 changed files with 42 additions and 7 deletions
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49
packages/taler-wallet-webextension/src/platform/chrome.ts
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@ -105,22 +105,30 @@ type HeaderListenerFunc = (
) => void;
let currentHeaderListener: HeaderListenerFunc | undefined = undefined;
type TabListenerFunc = (
tabId: number, info: chrome.tabs.TabChangeInfo,
) => void;
let currentTabListener: TabListenerFunc | undefined = undefined;
export function containsTalerHeaderListener(): boolean {
return currentHeaderListener !== undefined;
return currentHeaderListener !== undefined || currentTabListener !== undefined;
}
export async function removeHostPermissions(): Promise<boolean> {
//if there is a handler already, remove it
if (
"webRequest" in chrome &&
"onHeadersReceived" in chrome.webRequest &&
currentHeaderListener &&
chrome.webRequest.onHeadersReceived.hasListener(currentHeaderListener)
chrome?.webRequest?.onHeadersReceived?.hasListener(currentHeaderListener)
) {
chrome.webRequest.onHeadersReceived.removeListener(currentHeaderListener);
}
if (currentTabListener &&
chrome?.tabs?.onUpdated?.hasListener(currentTabListener)) {
chrome.tabs.onUpdated.removeListener(currentTabListener)
}
currentHeaderListener = undefined;
currentTabListener = undefined;
//notify the browser about this change, this operation is expensive
if ("webRequest" in chrome) {
@ -365,12 +373,26 @@ function registerTalerHeaderListener(
.map((h) => h.value)
.filter((value): value is string => !!value);
if (values.length > 0) {
logger.info(`Found a Taler URI in a response header for the request ${details.url} from tab ${details.tabId}`)
callback(details.tabId, values[0]);
}
}
return;
}
async function tabListener(tabId: number, info: chrome.tabs.TabChangeInfo): Promise<void> {
console.log("tab update", tabId, info)
if (tabId < 0) return;
if (info.status !== "complete") return;
const uri = await findTalerUriInTab(tabId);
console.log("uri", uri)
if (!uri) return;
logger.info(`Found a Taler URI in the tab ${tabId}`)
callback(tabId, uri)
}
const prevHeaderListener = currentHeaderListener;
const prevTabListener = currentTabListener;
getPermissionsApi()
.containsHostPermissions()
@ -382,17 +404,29 @@ function registerTalerHeaderListener(
) {
chrome.webRequest.onHeadersReceived.removeListener(prevHeaderListener);
}
if (prevTabListener && chrome?.tabs?.onUpdated?.hasListener(prevTabListener)) {
chrome.tabs.onUpdated.removeListener(prevTabListener)
}
//if the result was positive, add the headerListener
if (result) {
const listener: chrome.webRequest.WebResponseHeadersEvent | undefined =
const headersEvent: chrome.webRequest.WebResponseHeadersEvent | undefined =
chrome?.webRequest?.onHeadersReceived;
if (listener) {
listener.addListener(headerListener, { urls: ["<all_urls>"] }, [
if (headersEvent) {
headersEvent.addListener(headerListener, { urls: ["<all_urls>"] }, [
"responseHeaders",
]);
currentHeaderListener = headerListener;
}
const tabsEvent: chrome.tabs.TabUpdatedEvent | undefined =
chrome?.tabs?.onUpdated;
if (tabsEvent) {
tabsEvent.addListener(tabListener);
currentTabListener = tabListener;
}
}
//notify the browser about this change, this operation is expensive
chrome?.webRequest?.handlerBehaviorChanged(() => {
if (chrome.runtime.lastError) {
@ -400,6 +434,7 @@ function registerTalerHeaderListener(
}
});
});
}
const alertIcons = {