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-rw-r--r--bg/ExternalLicenses.js12
-rw-r--r--bg/ResponseProcessor.js22
2 files changed, 23 insertions, 11 deletions
diff --git a/bg/ExternalLicenses.js b/bg/ExternalLicenses.js
index 6eda008..6d35863 100644
--- a/bg/ExternalLicenses.js
+++ b/bg/ExternalLicenses.js
@@ -48,7 +48,17 @@ const ExternalLicenses = {
cachedHrefs.delete(tabId);
},
- // Checks external script using web labels
+ /**
+ * Checks external script using web labels
+ *
+ * If the script cannot be found in the web labels table, returns null.
+ *
+ * If the script can be found in the web labels table, and at least
+ * one of its licenses can be found in our free license DB, returns
+ * "free".
+ *
+ * Otherwise returns "nonfree".
+ */
async check(script) {
const { url, tabId, frameId, documentUrl } = script;
const tabCache = cachedHrefs.get(tabId);
diff --git a/bg/ResponseProcessor.js b/bg/ResponseProcessor.js
index 3c90d9c..429b778 100644
--- a/bg/ResponseProcessor.js
+++ b/bg/ResponseProcessor.js
@@ -29,6 +29,11 @@ const { ResponseMetaData } = require('./ResponseMetaData');
const listeners = new WeakMap();
const webRequestEvent = browser.webRequest.onHeadersReceived;
+// Some hardcoded return values for the onHeadersReceived callback.
+const BLOCKING_RESPONSES = {
+ ACCEPT: {}, // Do nothing
+ REJECT: { cancel: true }, // Cancel the request. See docs of BlockingResponse
+};
class ResponseProcessor {
@@ -53,13 +58,6 @@ class ResponseProcessor {
}
}
-Object.assign(ResponseProcessor, {
- // control flow values to be returned by handler.pre() callbacks
- ACCEPT: {},
- REJECT: { cancel: true },
- CONTINUE: null
-});
-
class ResponseTextFilter {
constructor(request) {
this.request = request;
@@ -72,13 +70,16 @@ class ResponseTextFilter {
}
async process(handler) {
- if (!this.canProcess) return ResponseProcessor.ACCEPT;
+ if (!this.canProcess) return BlockingResponses.ACCEPT;
const { metaData, request } = this;
const response = { request, metaData }; // we keep it around allowing callbacks to store state
if (typeof handler.pre !== 'function' || typeof handler.post !== 'function') {
throw new Error('handler should have a pre and post function.');
}
+
+ // If can determine without checking and filtering response
+ // payload then return.
const res = await handler.pre(response);
if (res) return res;
@@ -132,8 +133,9 @@ class ResponseTextFilter {
filter.close();
}
- return ResponseProcessor.ACCEPT;
+ // Accepting the filtered payload.
+ return BLOCKING_RESPONSES.ACCEPT;
}
}
-module.exports = { ResponseProcessor };
+module.exports = { ResponseProcessor, BLOCKING_RESPONSES };