Bug 1348278 - Limit speculative connections to http[s] only. r=mcmanus

Some protocol handlers don't handle speculative connections too well
(they crash). So, we limit to the most useful protocols. This patch
brought to you by
https://bugzilla.mozilla.org/show_bug.cgi?id=1348278#c21

MozReview-Commit-ID: 8dWGdVtalIS

--HG--
extra : rebase_source : 9ba674282e40d8313fdb8fbd2f1b9ae7567d299d

netwerk/base/nsIOService.cpp

@@ -1794,6 +1794,13 @@ nsIOService::SpeculativeConnectInternal(nsIURI *aURI,
                                         nsIInterfaceRequestor *aCallbacks,
                                         bool aAnonymous)
 {
+    bool isHTTP, isHTTPS;
+    if (!(NS_SUCCEEDED(aURI->SchemeIs("http", &isHTTP)) && isHTTP) &&
+        !(NS_SUCCEEDED(aURI->SchemeIs("https", &isHTTPS)) && isHTTPS)) {
+        // We don't speculatively connect to non-HTTP[S] URIs.
+        return NS_OK;
+    }
+
     if (IsNeckoChild()) {
         ipc::URIParams params;
         SerializeURI(aURI, params);