Accessing a cloud-based service

One or more non-transitory computer-readable media, wherein the one or more non-transitory computer-readable media are collectively provisioned with program instructions that, when executed by at least one processor, cause a system to:

• generate an authorization code that has an expiration time after which the authorization code expires;
• transmit, via at least one communication interface, at least one first message comprising the authorization code over a Wide Area Network (WAN);
• receive, via the at least one communication interface, at least one second message comprising the authorization code from a playback device over the WAN;
• determine that the received authorization code is valid based at least in part on the expiration time;
• after determining that the authorization code is valid, generate a first authorization token;
• transmit, via the at least one communication interface, at least one third message comprising the first authorization token to the playback device over the WAN;
• receive, via the at least one communication interface, at least one fourth message collectively comprising (i) a second authorization token and (ii) a request from the playback device over the WAN;
• determine that the second authorization token is valid;
• and
• after determining that the second authorization token is valid, provide the playback device with audio content based on the request.

A system comprising:

• at least one cloud server comprising:
• at least one communication interface;
• at least one processor;
• and
• at least one non-transitory computer-readable medium collectively comprising program instructions that are executable by the at least one processor such that the at least one cloud server is configured to:
• transmit, via the at least one communication interface, at least one first message comprising an authorization code over a Wide Area Network (WAN), wherein the authorization code has an expiration time after which the authorization code expires;
• receive, via the at least one communication interface, at least one second message comprising the authorization code from a playback device over the WAN;
• determine that the received authorization code is valid based at least in part on the expiration time;
• after determining that the authorization code is valid, transmit at least one third message comprising a first authorization token to the playback device over the WAN;
• receive, via the at least one communication interface, at least one fourth message collectively comprising (i) a second authorization token and (ii) a request from the playback device over the WAN;
• determine that the second authorization token is valid;
• and
• after determining that the second authorization token is valid, transmit audio content based on the request to the playback device;
• and
• the playback device comprising:
• at least one second communication interface;
• at least one second processor;
• and
• at least one second non-transitory computer-readable medium collectively comprising second program instructions that are executable by the at least one second processor such that the playback device is configured to:
• before the expiration time, transmit the at least one second message comprising the authorization code over the WAN;
• and
• after receiving the audio content based on the request, play back the audio content.

A playback device comprising:

• at least one communication interface;
• at least one processor;
• at least one non-transitory computer-readable medium comprising program instructions that are executable by the at least one processor such that the playback device is configured to:
• receive, via the at least one communication interface, at least one first message comprising an authorization code, wherein the authorization code has an expiration time after which the authorization code expires;
• transmit, via the at least one communication interface over a wide-area-network (WAN), at least one second message comprising the authorization code;
• after transmitting the authorization code, receive at least one third message comprising an authorization token;
• after receiving the authorization token, transmit at least one fourth message comprising (i) the authorization token and (ii) a request to a cloud server over the WAN;
• receive, from the cloud server over the WAN, audio content based on the request;
• and
• after receiving the audio content based on the request, output the audio content.