我正在使用改装2来上传图片，而且由于用户多次点击上传按钮，我得到了太多重复的图片。
禁用按钮不是我案例的解决方案，因为用户可以关闭活动并重新打开它。
如何在开始上传请求之前知道是否有正在运行的请求。 第二个问题是如何在重新创建活动后获得运行上传的进度？
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(ice/INFO) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refreshed
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) STUN-CLIENT(consent): Received response; processing
(ice/INFO) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refreshed
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) STUN-CLIENT(consent): Received response; processing
(ice/INFO) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refreshed
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) Unrecognized attribute: 0xc057
(stun/INFO) STUN-CLIENT(consent): Received response; processing
(ice/INFO) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refreshed
(stun/INFO) Unrecognized attribute: 0xc057
(ice/WARNING) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refresh timed out
(ice/INFO) ICE(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5))/STREAM(0-1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5) aLevel=0)/COMP(1): Consent refresh failed
(ice/INFO) ICE-PEER(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5):default)/CAND-PAIR(br08): setting pair to state CANCELLED: br08|IP4:192.168.2.176:49339/UDP|IP4:192.168.2.176:52952/UDP(turn-relay(IP4:192.168.178.25:56515/TCP|IP4:192.168.2.176:49339/UDP)|candidate:1502217555 1 udp 25042687 192.168.2.176 52952 typ relay raddr 80.113.157.125 rport 53996 generation 0 ufrag 9oaG network-id 1)
(ice/INFO) ICE-PEER(PC:1489051912852000 (id=619 url=https://www.onsplatform.tv/bewegenopafstand/beeldbellen/room/90bd4022-0524-45fd-bdd1-546b2a2853a5):default): all checks completed success=0 fail=1
(stun/INFO) STUN-CLIENT(consent): Timed out
+++++++ END ++++++++