httpserver error, http: panic (runtime error: invalid memory address or nil pointer dereference goroutine 330

[fa1rid]

I enabled the httpserver, then requested connect then status:

POST http://192.168.20.16:8011/connect?uuid=123456...
POST http://192.168.20.16:8011/status?uuid=123456...

$ go-chromecast httpserver
INFO[0000] starting http server on 0.0.0.0:8011
2024/02/13 13:31:00 http: panic serving 192.168.20.38:23608: runtime error: invalid memory address or nil pointer dereference
goroutine 33 [running]:
net/http.(*conn).serve.func1()
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:1850 +0xb8
panic({0x67d2a0, 0xcd9ad0})
/opt/hostedtoolcache/go/1.19.8/x64/src/runtime/panic.go:890 +0x260
github.com/vishen/go-chromecast/http.fromApplicationStatus(_, _, _)
/home/runner/work/go-chromecast/go-chromecast/http/types.go:49 +0x58
github.com/vishen/go-chromecast/http.(*Handler).status(0x40001259e0, {0x871f20?, 0x40005260e0}, 0x0?)
/home/runner/work/go-chromecast/go-chromecast/http/handlers.go:276 +0x94
net/http.HandlerFunc.ServeHTTP(0x400015430d?, {0x871f20?, 0x40005260e0?}, 0xffffffffffffffff?)
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:2109 +0x38
net/http.(*ServeMux).ServeHTTP(0xa9020?, {0x871f20, 0x40005260e0}, 0x4000194100)
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:2487 +0x140
github.com/vishen/go-chromecast/http.(*Handler).ServeHTTP(0x400015430d?, {0x871f20?, 0x40005260e0?}, 0x2e16e8?)
/home/runner/work/go-chromecast/go-chromecast/http/handlers.go:38 +0x28
net/http.serverHandler.ServeHTTP({0x400007c630?}, {0x871f20, 0x40005260e0}, 0x4000194100)
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:2947 +0x2cc
net/http.(*conn).serve(0x40000ce140, {0x872920, 0x40003debd0})
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:1991 +0x544
created by net/http.(*Server).Serve
/opt/hostedtoolcache/go/1.19.8/x64/src/net/http/server.go:3102 +0x43c

[vishen]

Looks like for some reason the application isn't being loaded correctly, and we assume that the application is always there. I think we can add a check to see if the app != nil in https://github.com/vishen/go-chromecast/blob/master/http/types.go#L49 before trying to map data from it.