Bug 1896171 - Part 3: Remove constraint on the server URI being an implementor of nsIMsgMailNewsUrl. r=leftmostcat,mkmelin

Differential Revision: https://phabricator.services.mozilla.com/D211259

--HG--
extra : rebase_source : 9158bfcbaef26e215bf9d0879cb34e165ff16c5c

mailnews/compose/src/MessageSend.sys.mjs

@@ -657,12 +657,24 @@ export class MessageSend {
         }
       }
       if (isNSSError) {
-        const u = url.QueryInterface(Ci.nsIMsgMailNewsUrl);
+        let secInfo = null;
+        let location = null;
+
+        if (url instanceof Ci.nsIMsgMailNewsUrl) {
+          // Not all URLs implement nsIMsgMailNewsUrl. Ideally we should not
+          // share the security info with the consumer by stamping it onto the
+          // URL, but for now we do what we can with what we have.
+          secInfo = url.failedSecInfo;
+          location = url.asciiHostPort;
+        } else {
+          location = `${url.host}:${url.port}`;
+        }
+
         this.notifyListenerOnTransportSecurityError(
           null,
           exitCode,
-          u.failedSecInfo,
-          u.asciiHostPort
+          secInfo,
+          location
         );
       }
       this.notifyListenerOnStopSending(null, exitCode, null, null);
@@ -1411,8 +1423,10 @@ class MsgDeliveryListener {
 
   OnStopRunningUrl(url, exitCode) {
     lazy.MsgUtils.sendLogger.debug(`OnStopRunningUrl; exitCode=${exitCode}`);
-    const mailUrl = url.QueryInterface(Ci.nsIMsgMailNewsUrl);
-    mailUrl.UnRegisterListener(this);
+
+    if (url instanceof Ci.nsIMsgMailNewsUrl) {
+      url.UnRegisterListener(this);
+    }
 
     this._msgSend.sendDeliveryCallback(url, this._isNewsDelivery, exitCode);
   }

rust/ews_xpcom/src/outgoing.rs

@@ -175,19 +175,14 @@ impl EwsOutgoingServer {
     xpcom_method!(server_uri => GetServerURI() -> *const nsIURI);
     fn server_uri(&self) -> Result<RefPtr<nsIURI>, nsresult> {
         let ews_url = self.ews_url.get();
-        let ews_url = ews_url.as_ref().ok_or_else(|| {
+        let ews_url = ews_url.ok_or_else(|| {
             log::error!(
                 "tried retrieving a URI for the server before initializing it with an EWS URL"
             );
             Err::<(), _>(nserror::NS_ERROR_NOT_INITIALIZED)
         })?;
 
-        // Build an ews:// URI for this server. We do this because the
-        // MessageSend module expects the URI to be QI-able into
-        // Ci.nsIMsgMailnewsUrl.
-        let username = self.username.borrow();
-        let host = ews_url.host_str().ok_or(nserror::NS_ERROR_FAILURE)?;
-        let url = nsCString::from(format!("ews://{username}@{host}"));
+        let url = nsCString::from(ews_url.as_str());
 
         let io_service =
             xpcom::get_service::<nsIIOService>(cstr::cstr!("@mozilla.org/network/io-service;1"))