full rewrite

Deal with queued scans. Enable l18n. Use fetch instead of XMLHttpRequest.
2000me · Feb 2, 2019 · d750ea9 · d750ea9
1 parent fc7a9b9
commit d750ea9
Showing 1 changed file with 99 additions and 26 deletions.
diff --git a/b.js b/b.js
@@ -1,33 +1,107 @@
-function dl(url) {
-    var xhttp = new XMLHttpRequest();
-    xhttp.onreadystatechange = function() {
-        if (this.readyState == 4 && this.status == 200) {
-			var responseJSON = JSON.parse(this.responseText);
-			var permalink = responseJSON.permalink;
-			if (permalink.match(/^https:\/\/www.virustotal.com\/([a-z]{2}\/)?url\/[0-9a-f]{64}\/analysis\/[0-9]{10}\/$/)) {
-				browser.windows.create({
-					type: "detached_panel",
-					url: permalink
-				});
-			} else {
-				browser.notifications.create({
-					"type": "basic",
-					"title": "VirusTotal",
-					"message": "unexpected permalink"
-				});
-			}
-		}
+'use strict';
+
+class ResponseError extends Error {
+    constructor(response) {
+        super(response.status);
+        this.name = this.constructor.name;
+        this.response = response;
+    }
+};
+
+function notifyUsingBasicNotification(msg) {
+    console.log('vtscan: ' + msg);
+    browser.notifications.clear(NOTIFIDATION_ID)
+    browser.notifications.create(
+        NOTIFIDATION_ID,
+        {
+            'type': 'basic',
+            'title': browser.i18n.getMessage('extensionName'),
+            'message': msg
+        }
+    );
+};
+
+function notifyResponseError(error) {
+    var msg;
+    if (error.response.status == 204) {
+        msg = browser.i18n.getMessage('notifyStillQueuedStoppedPolling');
+    } else {
+        msg = browser.i18n.getMessage('notifyUnexpectedResponse');
+    };
+    notifyUsingBasicNotification(msg);
+};
+
+function ok(response) {
+    if (response.status == 200) {
+        return Promise.resolve(response);
+    } else {
+        return Promise.reject(new ResponseError(response));
     };
-    xhttp.open("GET", url, true);
-    xhttp.send();
+};
+
+function json(response) {
+    return response.json();
+};
+
+function pollReport(responseJson, reportUrl, i) {
+    if (typeof responseJson['positives'] === 'undefined') {
+        if (i == 1) {
+            notifyUsingBasicNotification(
+                browser.i18n.getMessage(
+                    'notifyQueuedAndPolling',
+                    POLL_INTERVAL_SECONDS
+                )
+            )
+        }
+        if (i <= MAX_POLLS) {
+            setTimeout(() => {
+                fetch(reportUrl)
+                    .then(ok)
+                    .then(json)
+                    .then(responseJson => pollReport(responseJson, reportUrl, ++i))
+                    .catch(error => notifyResponseError(error))
+            }, POLL_INTERVAL_MILLISECONDS);
+        } else {
+            notifyUsingBasicNotification(
+                browser.i18n.getMessage('notifyStillQueuedStoppedPolling')
+            );
+        }        
+    } else {
+        var id = responseJson.scan_id.substring(0, 64);
+        if (id.match(/^[0-9a-f]{64}$/)) {
+            browser.windows.create({
+                url: DETECTION_URL_PREFIX + id + DETECTION_URL_SUFFIX
+            });
+        } else {
+            notifyUsingBasicNotification(
+                browser.i18n.getMessage('notifyUnexpectedResponse')
+            )
+        }
+    }
 }
 
-var urlPrefix = "https://www.virustotal.com/vtapi/v2/url/report?" +
-	"apikey=4771394c63f176c44ecbb9a14398041adc349096c072e72158ddf88be13ba164&scan=1&resource=";
+function scan(scanUrl, reportUrl) {
+    fetch(scanUrl)
+        .then(ok)
+        .then(json)
+        .then(responseJson => pollReport(responseJson, reportUrl, 1))
+        .catch(error => notifyResponseError(error));
+};
+
+const API_KEY = '4771394c63f176c44ecbb9a14398041adc349096c072e72158ddf88be13ba164';
+const API_REPORT_URL = 'https://www.virustotal.com/vtapi/v2/url/report';
+const DETECTION_URL_PREFIX = 'https://www.virustotal.com/#/url/';
+const DETECTION_URL_SUFFIX = '/detection';
+const MAX_POLLS = 4;
+const NOTIFIDATION_ID = 'vtscan';
+const POLL_INTERVAL_SECONDS = 5;
+const POLL_INTERVAL_MILLISECONDS = POLL_INTERVAL_SECONDS * 1000;
+const SCAN_URL_PREFIX = API_REPORT_URL + '?apikey=' + API_KEY + '&scan=1&resource=';
+const REPORT_URL_PREFIX = API_REPORT_URL + '?apikey=' + API_KEY + '&resource=';
 
 browser.contextMenus.create({
     id: "vtscan@gmx.de",
-    title: "VirusTotal Scan",
+    title: browser.i18n.getMessage('extensionName'),
     contexts: ["link"],
 	"icons": {
 		"16": "i.svg"
@@ -36,7 +110,6 @@ browser.contextMenus.create({
 
 browser.contextMenus.onClicked.addListener((info, tab) => {
     if (info.menuItemId === "vtscan@gmx.de") {
-		dl(urlPrefix + info.linkUrl);
+        scan(SCAN_URL_PREFIX +  info.linkUrl, REPORT_URL_PREFIX + info.linkUrl);
 	}
 });
-