more robust client when dealing with slow network connections

panda/src/downloader/bioStreamBuf.cxx

@@ -194,6 +194,16 @@ underflow() {
         // the server.  But BIO_should_retry() *appears* to be
         // reliable.
         _read_open = (BIO_should_retry(*_source) != 0);
+
+#ifdef IS_OSX
+        // occassionally we get -1 on read_open on the mac
+        // the os_error is 35 which means "Resource temporarily unavailable".
+        if ( (_read_open == -1) && (os_error == 35)) {
+          downloader_cat.warning() << "forcing retry to true again and _read_open to true\n";
+          BIO_set_retry_read(*_source);
+          _read_open = true;
+        }
+#endif
         if (!_read_open) {
           downloader_cat.info()
             << "Lost connection to "

panda/src/downloader/httpChannel.cxx

@@ -44,6 +44,11 @@ HTTPChannel::
 HTTPChannel(HTTPClient *client) :
   _client(client)
 {
+  ConfigVariableDouble extra_ssl_handshake_time
+    ("extra-ssl-handshake-time", 0.0,
+     PRC_DESC("This specifies how much extra time to try to establish"
+               "the ssl handshake before we bail."));
+  _extra_ssl_handshake_time = extra_ssl_handshake_time;
   _proxy_next_index = 0;
   _persistent_connection = false;
   _allow_proxy = true;
@@ -1563,7 +1568,7 @@ run_ssl_handshake() {
       double elapsed =
         TrueClock::get_global_ptr()->get_short_time() -
         _started_connecting_time;
-      if (elapsed <= get_connect_timeout()) {
+      if (elapsed <= get_connect_timeout() + _extra_ssl_handshake_time) {
         // Keep trying.
         return true;
       }

panda/src/downloader/httpChannel.h

@@ -429,6 +429,10 @@ private:
   int _last_status_code;
   double _last_run_time;
 
+  // RAU we find that we may need a little more time for the
+  // ssl handshake when the phase files are downloading
+  double _extra_ssl_handshake_time;
+
 public:
   virtual TypeHandle get_type() const {
     return get_class_type();