1 files changed, 149 insertions, 0 deletions
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/lib/http_observer/http_request_observer.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/lib/http_observer/http_request_observer.js
new file mode 100644
index 0000000..0b6e14d
--- /dev/null
+++ b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/lib/http_observer/http_request_observer.js
@@ -0,0 +1,149 @@
+/**
+ * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
+ * *
+ * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
+ * Copyright (C) 2014, 2015 Nik Nyby
+ *
+ * This file is part of GNU LibreJS.
+ *
+ * GNU LibreJS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNU LibreJS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU LibreJS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+var {Cc, Ci, Cu, Cm, Cr} = require("chrome");
+
+var observerService = Cc["@mozilla.org/observer-service;1"]
+      .getService(Ci.nsIObserverService);
+
+// these are our target mime types for response interception.
+var targetMimeTypes = /.*(javascript|ecmascript|html).*/i;
+//var targetMimeTypes = /.*(html).*/i;
+
+// ensure xhr won't create an infinite loop
+// with html content.
+var urlTester = require("../html_script_finder/url_seen_tester")
+    .urlSeenTester;
+var streamLoader = require("../http_observer/stream_loader").streamLoader;
+
+var httpRequestObserver = {
+    observe: function(request, aTopic, aData) {
+        console.debug('atopic is', aTopic);
+        var url, newListener, status;
+
+        if (aTopic === "http-on-examine-response" ||
+            aTopic === "http-on-examine-cached-response" ||
+            aTopic === "http-on-examine-merged-response"
+        ) {
+            request.QueryInterface(Ci.nsIHttpChannel);
+
+            if (request.URI.scheme !== 'chrome' && 
+                (request.responseStatus < 300 || 
+                 request.responseStatus > 399) &&
+                (targetMimeTypes.test(request.contentType) || 
+                 request.contentType === undefined) &&
+                (!urlTester.isWhitelisted(request.URI.spec) &&
+                 !urlTester.isWhitelisted(request.originalURI.spec))
+            ) {
+                newListener = new TracingListener();
+                request.QueryInterface(Ci.nsITraceableChannel);
+                newListener.originalListener = request.setNewListener(newListener);
+            } else if (urlTester.isWhitelisted(request.URI.spec) ||
+                urlTester.isWhitelisted(request.originalURI.spec)
+            ) {
+                urlTester.clearUrl(request.URI.spec);
+                urlTester.clearUrl(request.originalURI.spec);
+            }
+
+        }
+    },
+
+    QueryInterface: function (aIID) {
+        if (aIID.equals(Ci.nsIObserver) ||
+            aIID.equals(Ci.nsISupports)
+        ) {
+            return this;
+        }
+        throw Cr.NS_NOINTERFACE;
+    }
+};
+
+// Copy response listener implementation.
+function TracingListener() {
+    this.originalListener = null;
+    this.streamLoader = streamLoader();
+}
+
+TracingListener.prototype = {
+    onDataAvailable: function(request, context, inputStream, offset, count) {
+        try {
+            this.streamLoader.loader.onDataAvailable(
+                request, context, inputStream, offset, count);
+        } catch (x) {
+            console.debug(x, x.lineNumber, x.fileName, "In this case, charset is");
+        }
+    },
+
+    onStartRequest: function(request, context) {	
+        this.streamLoader.setOriginalListener(this.originalListener);
+        this.streamLoader.loader.onStartRequest(request, context);     
+        this.originalListener.onStartRequest(request, context);
+    },
+
+    onStopRequest: function(request, context, statusCode) {
+        try {
+            this.streamLoader.loader.onStopRequest(request, context, statusCode);
+        } catch (e) {
+            console.debug('error in onStopRequest', e, e.lineNumber);
+        }
+    },
+
+    QueryInterface: function (aIID) {
+        if (aIID.equals(Ci.nsIStreamListener) ||
+            aIID.equals(Ci.nsISupports)
+        ) {
+            return this;
+        }
+        throw Cr.NS_NOINTERFACE;
+    },
+};
+
+exports.startHttpObserver = function() {
+    try {
+        observerService.addObserver(httpRequestObserver,
+                                    "http-on-examine-response", false);
+        observerService.addObserver(httpRequestObserver,
+                                    "http-on-examine-cached-response", false);
+        observerService.addObserver(httpRequestObserver,
+                                    "http-on-examine-merged-response", false);
+        console.debug('turned on http observer');
+    } catch (e) {
+        console.debug(e);
+    }
+};
+
+exports.startHttpObserver();
+
+/* remove observer */
+exports.removeHttpObserver = function() {
+    try {
+        observerService.removeObserver(httpRequestObserver,
+                "http-on-examine-response");
+        observerService.removeObserver(httpRequestObserver,
+                "http-on-examine-cached-response");
+        observerService.removeObserver(httpRequestObserver,
+                "http-on-examine-merged-response");
+        console.debug('turned off http observer');
+    } catch (e) {
+        console.debug(e);
+    }
+};