Null Pointer exception if configuration not correct

[LasneF]

given a wrong config files

variables:
someVar: localhost:8000
redirectURL: http://localhost:8000
contract: ./component-descriptor.yml

paths:
/*:
target: ${http://localhost:8000}/ranch <= yes i know it is wrong 😅

call then crash with not clear details cf stack below

config miss configuration could be spot at loading time ; or if not possible just catch the null value

::1 - - [06/Oct/2023:11:03:53 +0200] "GET /ranch HTTP/1.1" 200 0 "" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.47"
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x8 pc=0x5d6b94]

goroutine 573 [running]:
net/url.(*URL).String(0x0)
/opt/hostedtoolcache/go/1.21.0/x64/src/net/url/url.go:810 +0x34
github.com/pb33f/wiretap/daemon.BuildHttpTransaction({0xc00008ec00?, 0xc00008ee00?, 0xc000806ff0?, 0xc000070ea0?}) /home/runner/work/wiretap/wiretap/daemon/build_request.go:140 +0x82f
github.com/pb33f/wiretap/daemon.(*WiretapService).validateRequest(0xc0005f7540, 0xc0009a00c0, 0xc000b82020?)
/home/runner/work/wiretap/wiretap/daemon/validate.go:74 +0x278
created by github.com/pb33f/wiretap/daemon.(*WiretapService).handleHttpRequest in goroutine 633
/home/runner/work/wiretap/wiretap/daemon/handle_request.go:157 +0xa65

[daveshanley]

100% broken, will fix!

[daveshanley]

Fixed in v0.0.40

Now renders out an explicit configuration error message instead of a panic.