SIP 204 No Notification vs 305 Use Proxy
SIP 204 (No Notification) is a 2xx Success response, while 305 (Use Proxy) is a 3xx Redirection response. 204 indicates that the request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request. In contrast, 305 means that the requested resource must be accessed through the proxy given by the Contact header field.
설명
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
이 코드를 보게 되는 경우
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
해결 방법
No fix needed. The subscription was accepted but there is no state change to notify about yet.
설명
The requested resource must be accessed through the proxy given by the Contact header field.
이 코드를 보게 되는 경우
When the request must be routed through a specific outbound proxy server.
해결 방법
Resend the request through the proxy specified in the Contact header of this response.
주요 차이점
204 is a 2xx Success response, while 305 is a 3xx Redirection response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 305: The requested resource must be accessed through the proxy given by the Contact header field.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 305 when when the request must be routed through a specific outbound proxy server.
언제 어떤 것을 사용할지
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 305 (Use Proxy): Resend the request through the proxy specified in the Contact header of this response.