fix #34 delete querystring in labels

[cupen]

fix #34

[cupen]

@zsais Hello?

[cupen]

@zsai Hello, it‘s a very big problem, it will cause too many memory usage, both with your metrics program and prometheus tsdb.
heres is my prometheus logs.

level=info ts=2019-07-21T05:10:05.029Z caller=main.go:668 msg="TSDB started"
level=info ts=2019-07-21T05:10:05.040Z caller=main.go:738 msg="Loading configuration file" filename=/etc/prometheus/prometheus.yml
level=info ts=2019-07-21T05:10:05.060Z caller=main.go:766 msg="Completed loading of configuration file" filename=/etc/prometheus/prometheus.yml
level=info ts=2019-07-21T05:10:05.060Z caller=main.go:621 msg="Server is ready to receive web requests."
level=info ts=2019-07-21T05:10:22.567Z caller=compact.go:495 component=tsdb msg="write block" mint=1563674400000 maxt=1563681600000 ulid=01DG9EZZ2R2GNAB73MF3TF85ED duration=9.230158995s
level=info ts=2019-07-21T05:10:24.785Z caller=head.go:586 component=tsdb msg="head GC completed" duration=742.465478ms
level=info ts=2019-07-21T05:10:40.581Z caller=head.go:656 component=tsdb msg="WAL checkpoint complete" first=42 last=45 duration=15.795350131s
level=warn ts=2019-07-21T06:33:54.405Z caller=scrape.go:952 component="scrape manager" scrape_pool=game target=http://172.17.125.122:3301/metrics msg="appending scrape report failed" err="out of bounds"
level=info ts=2019-07-21T07:30:34.769Z caller=compact.go:495 component=tsdb msg="write block" mint=1563681600000 maxt=1563688800000 ulid=01DG9P39F74KY4H1E8CB711G5G duration=16m12.466554245s
level=info ts=2019-07-21T07:30:40.598Z caller=head.go:586 component=tsdb msg="head GC completed" duration=975.988923ms
level=info ts=2019-07-21T07:30:45.915Z caller=head.go:656 component=tsdb msg="WAL checkpoint complete" first=46 last=48 duration=5.284232112s
level=info ts=2019-07-21T09:13:20.501Z caller=compact.go:495 component=tsdb msg="write block" mint=1563688800000 maxt=1563696000000 ulid=01DG9WCY2FMF2K4RMHGT9AGRQP duration=8m50.730077783s
level=info ts=2019-07-21T09:14:33.813Z caller=head.go:586 component=tsdb msg="head GC completed" duration=1.319307159s
level=info ts=2019-07-21T09:14:38.789Z caller=head.go:656 component=tsdb msg="WAL checkpoint complete" first=49 last=50 duration=4.948203164s
level=info ts=2019-07-21T09:19:33.043Z caller=compact.go:440 component=tsdb msg="compact blocks" count=3 mint=1563667200000 maxt=1563688800000 ulid=01DG9WZJRDDA0QTM2CXYQDAK2S sources="[01DG97HHZD07CFXGXY4EZF3J94 01DG9EZZ2R2GNAB73MF3TF85ED 01DG9P39F74KY4H1E8CB711G5G]" duration=4m52.264798276s
level=info ts=2019-07-21T09:20:39.310Z caller=compact.go:440 component=tsdb msg="compact blocks" count=3 mint=1563624000000 maxt=1563688800000 ulid=01DG9X8QAXDC00TGWDAV7YQRVJ sources="[01DG8JYVNX93167ZS0GKGCRQKV 01DG97J3895BNE3PFKC3X8CKZW 01DG9WZJRDDA0QTM2CXYQDAK2S]" duration=58.934321964s
level=warn ts=2019-07-21T12:07:34.856Z caller=scrape.go:952 component="scrape manager" scrape_pool=game target=http://172.17.125.122:3301/metrics msg="appending scrape report failed" err="out of bounds"
level=info ts=2019-07-21T12:50:54.838Z caller=compact.go:495 component=tsdb msg="write block" mint=1563696000000 maxt=1563703200000 ulid=01DGA5ZR14FWX37HQP48A3S5TY duration=58m51.475949916s

It's horrible.

[cupen]

I'll use my local fork before it be merged
go.mod

replace github.com/zsais/go-gin-prometheus => github.com/cupen/go-gin-prometheus patch-1