Transport method selection for delivery of server notifications

A method comprising:

• sending, by a client, a hypertext transfer protocol request for at least one asynchronous notification to be sent by a server to the client, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• determining, by the client, whether a first transport method selected by the server from the at least one proposed transport method is successfully established;
• and
• when the determination is that the first transport method is not established successfully, sending, by the client, another hypertext transfer protocol request to the server, the other hypertext transfer protocol request including at least one other proposed transport method.

A method comprising:

• receiving, by a server, a hypertext transfer protocol request for the server to send at least one asynchronous notification, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• sending, by the server, an indication of whether a first transport method selected by the server from the at least one proposed transport method is accepted for establishment;
• sending, by the server, a message to probe establishment of the first transport method;
• and
• receiving, by the server, another hypertext transfer protocol request including at least one other proposed transport method, when the first transport method is not accepted for establishment and/or not successfully established.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:
• send a hypertext transfer protocol request for at least one asynchronous notification to be sent by a server to the apparatus, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• determine whether a first transport method selected by the server from the at least one proposed transport method is successfully established;
• and
• when the determination is that the first transport method is not established successfully, send another hypertext transfer protocol request to the server, the other hypertext transfer protocol request including at least one other proposed transport method.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:
• receive a hypertext transfer protocol request for the apparatus to send at least one asynchronous notification, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• send an indication of whether a first transport method selected by the apparatus from the at least one proposed transport method is accepted for establishment;
• send a message to probe establishment of the first transport method;
• and
• receive another hypertext transfer protocol request including at least one other proposed transport method, when the first transport is not accepted for establishment and/or not successfully established.

A non-transitory computer-readable medium including program code which when executed causes operations comprising:

• sending, by a client, a hypertext transfer protocol request for at least one asynchronous notification to be sent by a server to the client, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• determining, by the client, whether a first transport method selected by the server from the at least one proposed transport method is successfully established;
• and
• when the determination is that the first transport method is not established successfully, sending, by the client, another hypertext transfer protocol request to the server, the other hypertext transfer protocol request including at least one other proposed transport method.

A non-transitory computer-readable medium including program code which when executed causes operations comprising:

• receiving, by a server, a hypertext transfer protocol request for the server to send at least one asynchronous notification, the hypertext transfer protocol request including at least one proposed transport method for carrying the at least one asynchronous notification;
• sending, by the server, an indication of whether a first transport method selected by the server from the at least one proposed transport method is accepted for establishment;
• sending, by the server, a message to probe establishment of the first transport method;
• and
• receiving, by the server, another hypertext transfer protocol request including at least one other proposed transport method, when the first transport is not accepted for establishment and/or not successfully established.