feat: prometheus metrics
This commit is contained in:
parent
c8e82d5d43
commit
afabaec45b
7 changed files with 120 additions and 17 deletions
20
cmd/root.go
20
cmd/root.go
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@ -8,12 +8,18 @@ import (
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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// "github.com/gorilla/mux" // Import Gorilla Mux
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"goblin/config"
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"goblin/internal/paste"
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"goblin/internal/router"
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// "goblin/internal/router"
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)
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var verbose bool
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var (
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verbose bool
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enableMetrics bool
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)
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var rootCmd = &cobra.Command{
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Use: "goblin",
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@ -57,13 +63,16 @@ var rootCmd = &cobra.Command{
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log.Infof("Private mode: %v", private)
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// Create the router and start the server using the router package
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r := router.NewRouter()
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// r := router.NewRouter()
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// Add a new route for Prometheus metrics
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http.Handle("/metrics", promhttp.Handler()) // Use Prometheus handler
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log.Info("Server started")
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log.Infof("Listening on port %s\n", port)
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err = http.ListenAndServe(":"+port, r)
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err = http.ListenAndServe(":"+port, nil) // Use nil handler for default routing
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if err != nil {
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log.Errorf("Error starting server: %v\n", err)
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}
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@ -87,8 +96,9 @@ func intializeFlags() {
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rootCmd.PersistentFlags().String("templateDirectory", "", "Template directory path")
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rootCmd.PersistentFlags().String("logDir", "", "Log file location")
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rootCmd.PersistentFlags().String("pasteDir", "", "Paste storage location")
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rootCmd.PersistentFlags().BoolVar(&verbose, "verbose", false, "Print config values")
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rootCmd.PersistentFlags().BoolVar(&verbose, "verbose", false, "Print config values and enable verbose logging")
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rootCmd.PersistentFlags().Int("expire", 24, "Paste expiration duration in hours")
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rootCmd.PersistentFlags().BoolVar(&enableMetrics, "metrics", false, "Enable Prometheus metrics")
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viper.BindPFlag("Port", rootCmd.PersistentFlags().Lookup("port"))
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viper.BindPFlag("Private", rootCmd.PersistentFlags().Lookup("private"))
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@ -26,7 +26,8 @@ func LoadConfig() (*AppConfig, error) {
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viper.SetDefault("TemplateDir", "templates")
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viper.SetDefault("LogDir", "logs")
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viper.SetDefault("PasteDir", "pastes")
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viper.SetDefault("Expire", 24) // Default expiration duration in hours
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viper.SetDefault("Expire", 24) // in hours
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viper.SetDefault("Metrics", false)
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// read the configuration file if it's present
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// goblin can also be configured through command lines during runtime
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9
go.mod
9
go.mod
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@ -4,18 +4,26 @@ go 1.20
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require (
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github.com/gorilla/mux v1.8.0
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github.com/prometheus/client_golang v1.16.0
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github.com/sirupsen/logrus v1.9.3
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github.com/spf13/cobra v1.7.0
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github.com/spf13/viper v1.16.0
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)
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require (
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github.com/beorn7/perks v1.0.1 // indirect
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github.com/cespare/xxhash/v2 v2.2.0 // indirect
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github.com/fsnotify/fsnotify v1.6.0 // indirect
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github.com/golang/protobuf v1.5.3 // indirect
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github.com/hashicorp/hcl v1.0.0 // indirect
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github.com/inconshreveable/mousetrap v1.1.0 // indirect
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github.com/magiconair/properties v1.8.7 // indirect
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github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
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github.com/mitchellh/mapstructure v1.5.0 // indirect
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github.com/pelletier/go-toml/v2 v2.0.8 // indirect
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github.com/prometheus/client_model v0.3.0 // indirect
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github.com/prometheus/common v0.42.0 // indirect
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github.com/prometheus/procfs v0.10.1 // indirect
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github.com/spf13/afero v1.9.5 // indirect
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github.com/spf13/cast v1.5.1 // indirect
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github.com/spf13/jwalterweatherman v1.1.0 // indirect
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@ -24,6 +32,7 @@ require (
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github.com/subosito/gotenv v1.4.2 // indirect
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golang.org/x/sys v0.8.0 // indirect
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golang.org/x/text v0.9.0 // indirect
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google.golang.org/protobuf v1.30.0 // indirect
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gopkg.in/ini.v1 v1.67.0 // indirect
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gopkg.in/yaml.v3 v3.0.1 // indirect
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)
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24
go.sum
24
go.sum
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@ -38,7 +38,11 @@ cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3f
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dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
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github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
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github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
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github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
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github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
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github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
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github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
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github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
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@ -87,6 +91,9 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
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github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
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github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
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github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
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github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
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github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
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github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
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github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
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github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
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@ -98,6 +105,7 @@ github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
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github.com/google/martian/v3 v3.0.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
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@ -138,6 +146,8 @@ github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
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github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0VQdvPDY=
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github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
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github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
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github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
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github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
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github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
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github.com/pelletier/go-toml/v2 v2.0.8 h1:0ctb6s9mE31h0/lhu+J6OPmVeDxJn+kYnJc2jZR9tGQ=
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@ -146,7 +156,15 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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github.com/pkg/sftp v1.13.1/go.mod h1:3HaPG6Dq1ILlpPZRO0HVMrsydcdLt6HRDccSgb87qRg=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
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github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
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github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
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github.com/prometheus/client_model v0.3.0 h1:UBgGFHqYdG/TPFD1B1ogZywDqEkwp3fBMvqdiQ7Xew4=
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github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
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github.com/prometheus/common v0.42.0 h1:EKsfXEYo4JpWMHH5cg+KOUWeuJSov1Id8zGR8eeI1YM=
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github.com/prometheus/common v0.42.0/go.mod h1:xBwqVerjNdUDjgODMpudtOMwlOwf2SaTr1yjz4b7Zbc=
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github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg=
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github.com/prometheus/procfs v0.10.1/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM=
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github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
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github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
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github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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@ -471,9 +489,13 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
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google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
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google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
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google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
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google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
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google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
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google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
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gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
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gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
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gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
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gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
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50
internal/metrics/metrics.go
Normal file
50
internal/metrics/metrics.go
Normal file
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@ -0,0 +1,50 @@
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package metrics
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import (
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"github.com/gorilla/mux"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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var (
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pasteLengthHistogram = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "goblin",
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Subsystem: "paste",
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Name: "length",
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Help: "Length of pastes",
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Buckets: prometheus.ExponentialBuckets(1, 2, 10), // Example buckets
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},
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[]string{"status"}, // Labels for success/failure
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)
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pasteCreatedCounter = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: "goblin",
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Subsystem: "paste",
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Name: "created_total",
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Help: "Total number of pastes created",
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},
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[]string{"status"}, // Labels for success/failure
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)
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)
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// ObservePasteLength records the length of pastes.
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func ObservePasteLength(status string, length float64) {
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pasteLengthHistogram.WithLabelValues(status).Observe(length)
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}
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// IncrementPasteCreatedCounter increments the paste creation counter.
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func IncrementPasteCreatedCounter(status string) {
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pasteCreatedCounter.WithLabelValues(status).Inc()
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}
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// InitPrometheus initializes Prometheus metrics and registers a handler for /metrics endpoint.
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func InitPrometheus(router *mux.Router) {
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// Register Prometheus metrics collectors here
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// For example, you can use promauto to define and register metrics
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// Register Prometheus HTTP handler for /metrics endpoint with the Mux router
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router.Handle("/metrics", promhttp.Handler())
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}
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@ -8,9 +8,9 @@ import (
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"time"
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"goblin/internal/metrics"
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"goblin/internal/util"
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"github.com/gorilla/mux"
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@ -62,6 +62,7 @@ func CreatePasteHandler(w http.ResponseWriter, r *http.Request) {
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content, err := io.ReadAll(r.Body)
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if err != nil {
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http.Error(w, "Failed to read request body", http.StatusBadRequest)
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metrics.IncrementPasteCreatedCounter("failure")
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return
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}
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@ -96,6 +97,7 @@ func CreatePasteHandler(w http.ResponseWriter, r *http.Request) {
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if err := util.CreateDirectoryIfNotExists(pasteDir); err != nil {
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logger.Errorf("Failed to create paste directory: %v", err)
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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metrics.IncrementPasteCreatedCounter("failure")
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return
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}
|
||||
|
||||
|
|
@ -105,6 +107,7 @@ func CreatePasteHandler(w http.ResponseWriter, r *http.Request) {
|
|||
if err != nil {
|
||||
logger.Errorf("Failed to create paste file: %v", err)
|
||||
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
|
||||
metrics.IncrementPasteCreatedCounter("failure")
|
||||
return
|
||||
}
|
||||
defer pasteFile.Close()
|
||||
|
|
@ -114,32 +117,38 @@ func CreatePasteHandler(w http.ResponseWriter, r *http.Request) {
|
|||
if err != nil {
|
||||
logger.Errorf("Failed to write paste content to file: %v", err)
|
||||
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
|
||||
metrics.IncrementPasteCreatedCounter("failure")
|
||||
return
|
||||
}
|
||||
|
||||
// Determine the protocol based on the request's TLS connection
|
||||
protocol := "http"
|
||||
// Construct the complete paste URL including the protocol
|
||||
var protocol string
|
||||
if r.TLS != nil {
|
||||
protocol = "https"
|
||||
} else {
|
||||
protocol = "http"
|
||||
}
|
||||
|
||||
// Construct the complete paste URL with the protocol
|
||||
pasteURL := fmt.Sprintf("%s://%s/%s", protocol, r.Host, pasteID)
|
||||
|
||||
// Remove any trailing '%' character from the pasteURL
|
||||
if strings.HasSuffix(pasteURL, "%") {
|
||||
pasteURL = pasteURL[:len(pasteURL)-1]
|
||||
}
|
||||
|
||||
// Write the paste URL in the response
|
||||
response := fmt.Sprintf("Paste available at %s", pasteURL)
|
||||
w.Write([]byte(response))
|
||||
|
||||
// Record metrics
|
||||
metrics.IncrementPasteCreatedCounter("success")
|
||||
metrics.ObservePasteLength("success", float64(len(content)))
|
||||
}
|
||||
|
||||
func GetPasteHandler(w http.ResponseWriter, r *http.Request) {
|
||||
vars := mux.Vars(r)
|
||||
pasteID := vars["id"]
|
||||
|
||||
// Exclude the "/metrics" path
|
||||
if pasteID == "metrics" {
|
||||
http.NotFound(w, r)
|
||||
return
|
||||
}
|
||||
|
||||
p, exists := pasteMap[pasteID]
|
||||
if !exists {
|
||||
http.Error(w, "Paste not found", http.StatusNotFound)
|
||||
|
|
|
|||
|
|
@ -9,7 +9,9 @@ import (
|
|||
|
||||
func NewRouter() http.Handler {
|
||||
r := mux.NewRouter()
|
||||
|
||||
r.HandleFunc("/", paste.CreatePasteHandler).Methods("POST")
|
||||
r.HandleFunc("/{id}", paste.GetPasteHandler).Methods("GET")
|
||||
|
||||
return r
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue