first commit

hw_datacollector - Kopie/background.js

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+/* global chrome */
+
+// List of tabIds where CSP headers are disabled
+var disabledTabIds = [];
+
+var isCSPDisabled = function (tabId) {
+    return disabledTabIds.includes(tabId);
+};
+
+var toggleDisableCSP = function (tabId) {
+    if (isCSPDisabled(tabId)) {
+        // remove this tabId from disabledTabIds
+        disabledTabIds = disabledTabIds.filter(function (val) {
+            return val !== tabId;
+        });
+    } else {
+        disabledTabIds.push(tabId);
+
+        // Sites that use Application Cache to cache their HTML document means this
+        // extension is not able to alter HTTP response headers (as there is no HTTP
+        // request when serving documents from the cache).
+        //
+        // An example page that this fixes is https://web.whatsapp.com
+        chrome.browsingData.remove({}, { serviceWorkers: true }, function () { });
+    }
+    updateUI(tabId);
+};
+
+var onHeadersReceived = function (details) {
+    if (!isCSPDisabled(details.tabId)) {
+        return;
+    }
+
+    for (var i = 0; i < details.responseHeaders.length; i++) {
+        if (details.responseHeaders[i].name.toLowerCase() === 'content-security-policy') {
+            details.responseHeaders[i].value = '';
+        }
+    }
+
+    return {
+        responseHeaders: details.responseHeaders
+    };
+};
+
+var updateUI = function (tabId) {
+    var isDisabled = isCSPDisabled(tabId);
+    var iconName = isDisabled ? 'off' : 'on';
+    var title = isDisabled ? 'disabled' : 'enabled';
+
+    chrome.browserAction.setIcon({ path: 'hero_' + iconName + '.png' });
+    chrome.browserAction.setTitle({ title: 'HW Collector are ' + title });
+};
+
+var init = function () {
+    // When Chrome recieves some headers
+    var onHeaderFilter = { urls: ['*://*/*'], types: ['main_frame', 'sub_frame', "script", "object", "xmlhttprequest", "other"] };
+    chrome.webRequest.onHeadersReceived.addListener(
+        onHeadersReceived, onHeaderFilter, ['blocking', 'responseHeaders']
+    );
+
+    // When the user clicks the plugin icon
+    //chrome.browserAction.onClicked.addListener(function (tab) {
+    //    toggleDisableCSP(tab.id);
+    //});
+
+    // When the user changes tab
+    chrome.tabs.onActivated.addListener(function (activeInfo) {
+        updateUI(activeInfo.tabId);
+    });
+
+    // onAttached
+};
+
+init();