Improve logging and configuration

cmd/print_config.go

@@ -0,0 +1,25 @@
+package cmd
+
+import (
+	"github.com/cheqd/cheqd-did-resolver/utils"
+	"github.com/spf13/cobra"
+)
+
+func getPrintConfigCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "print-config",
+		Short: "Prints the active configuration",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return printConfig()
+		},
+	}
+}
+
+func printConfig() error {
+	config := utils.MustLoadConfig()
+	configYaml := config.MustMarshalYaml()
+
+	println(configYaml)
+
+	return nil
+}

cmd/root.go

@@ -0,0 +1,16 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func GetRootCmd() *cobra.Command {
+	rootCmd := &cobra.Command{
+		Use:   "cheqd-did-resolver",
+		Short: "Did resolver for the cheqd method",
+	}
+
+	rootCmd.AddCommand(getServeCmd(), getPrintConfigCmd())
+
+	return rootCmd
+}

cmd/serve.go

@@ -0,0 +1,95 @@
+package cmd
+
+import (
+	"github.com/cheqd/cheqd-did-resolver/services"
+	"github.com/cheqd/cheqd-did-resolver/types"
+	"github.com/cheqd/cheqd-did-resolver/utils"
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/cobra"
+	"net/http"
+	"strings"
+)
+
+func getServeCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "serve",
+		Short: "Runs resolver as a web server",
+		Run: func(cmd *cobra.Command, args []string) {
+			serve()
+		},
+	}
+}
+
+func serve() {
+	log.Info().Msg("Loading configuration")
+	config, err := utils.LoadConfig()
+	if err != nil {
+		panic(err)
+	}
+
+	log.Info().Msgf("Configuration: %s", config.MustMarshalJson())
+
+	log.Info().Msgf("Setting log level: %s", config.LogLevel)
+	level, err := zerolog.ParseLevel(config.LogLevel)
+	if err != nil {
+		panic(err)
+	}
+	zerolog.SetGlobalLevel(level)
+
+	// Echo instance
+	e := echo.New()
+
+	// Middleware
+	e.Use(middleware.Logger())
+	e.Use(middleware.Recover())
+
+	// Services
+	ledgerService := services.NewLedgerService()
+
+	networks := strings.Split(config.Resolver.Networks, ";")
+	for _, network := range networks {
+		args := strings.Split(network, "=")
+		name, url := args[0], args[1]
+
+		log.Info().Msgf("Registering network. Name: %s, url: %s.", name, url)
+		err := ledgerService.RegisterLedger(name, url)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	requestService := services.NewRequestService(config.Resolver.Method, ledgerService)
+
+	// Routes
+	e.GET(config.Api.ResolverPath, func(c echo.Context) error {
+		didUrl := c.Param("did")
+		log.Debug().Msgf("DID: %s", didUrl)
+
+		accept := strings.Split(c.Request().Header.Get(echo.HeaderAccept), ";")[0]
+		log.Trace().Msgf("Accept: %s", accept)
+
+		var requestedContentType types.ContentType
+		if strings.Contains(accept, string(types.JSONLD)) {
+			requestedContentType = types.DIDJSONLD
+		} else {
+			requestedContentType = types.DIDJSON
+		}
+		log.Debug().Msgf("Requested content type: %s", requestedContentType)
+
+		responseBody, err := requestService.ProcessDIDRequest(didUrl, types.ResolutionOption{Accept: requestedContentType})
+		if err != nil {
+			return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
+		}
+
+		log.Debug().Msgf("Response body: %s", responseBody)
+
+		c.Response().Header().Set(echo.HeaderContentType, accept)
+		return c.JSONBlob(http.StatusOK, []byte(responseBody))
+	})
+
+	log.Info().Msg("Starting listener")
+	log.Fatal().Err(e.Start(config.Api.Listener))
+}

config.yaml

@@ -1,9 +1,10 @@
-method: cheqd
-listener: 0.0.0.0:1313
-resolverPath: "/1.0/identifiers/:did"
-ledgerTimeout: 5s
-loglevel: debug
+resolver:
+  method: "cheqd"
+  networks: "mainnet=rpc.cheqd.net:443;testnet=159.89.208.88:443"
+  ledgerTimeout: "5s"
 
-networks: 
-    mainnet: rpc.cheqd.net:443
-    testnet: 159.89.208.88:443
+api:
+  listener: "0.0.0.0:1313"
+  resolverPath: "/1.0/identifiers/:did"
+
+logLevel: "debug"

docker/Dockerfile

@@ -1,43 +1,53 @@
-###############################################################
+#####################################################################
 ###    STAGE 1: Build cheqd-did-resolver binary pre-requisites    ###
-###############################################################
+#####################################################################
 
 FROM golang:1.17.8-buster as builder
 
 WORKDIR /root
 
 COPY types ./types
 COPY services ./services
+COPY cmd ./cmd
 COPY go.mod .
 COPY go.sum .
 COPY main.go .
 
 # Make cheqd-did-resolver binary
 RUN go build -o cheqd-did-resolver main.go
 
-###############################################################
+#####################################################################
 ###           STAGE 2: Build cheqd-did-resolver runner            ###
-###############################################################
+#####################################################################
 
 FROM ubuntu:focal AS runner
-LABEL org.opencontainers.image.description "Cheqd DID-Resolver runner"
-LABEL org.opencontainers.image.source "https://github.com/cheqd/cheqd-did-resolver"
-ENV CHEQD_RESOLVER_HOME_DIR="/home/cheqd-resolver"
 
-# Set user directory and details
+LABEL org.opencontainers.image.description="Cheqd DID-Resolver runner"
+LABEL org.opencontainers.image.source="https://github.com/cheqd/cheqd-did-resolver"
+
+
+# Set user details
 ARG UID=1000
 ARG GID=1000
-# Add cheqd user to use in the container
-RUN groupadd --system --gid $GID cheqd-resolver \
-    && useradd --system --create-home --home-dir ${CHEQD_RESOLVER_HOME_DIR} --shell /bin/bash --gid cheqd-resolver --uid $UID cheqd-resolver
+
+ARG USER="resolver"
+ARG GROUP="resolver"
+
+ARG HOME="/home/resolver"
+
+# Create user and group
+RUN groupadd --system --gid $GID $USER &&\
+    useradd --system --create-home --home-dir $HOME --shell /bin/bash --gid $GROUP --uid $UID $USER
 
 # Copy compiled cheqd-did-resolver binary from Stage 1
 COPY --from=builder /root /bin
 
 # Copy base config.yaml
-WORKDIR ${CHEQD_RESOLVER_HOME_DIR}
+COPY config.yaml $HOME
+
+WORKDIR $HOME
+USER $USER
 
-USER cheqd-resolver
-COPY config.yaml ${CHEQD_RESOLVER_HOME_DIR}
 EXPOSE 1313
-ENTRYPOINT ["cheqd-did-resolver"]
+
+ENTRYPOINT ["cheqd-did-resolver", "serve"]

go.mod

@@ -5,8 +5,13 @@ go 1.17
 require (
 	github.com/cheqd/cheqd-node v0.5.0
 	github.com/labstack/echo/v4 v4.7.2
+	github.com/rs/zerolog v1.23.0
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/viper v1.11.0
 	github.com/stretchr/testify v1.7.1
 	google.golang.org/grpc v1.45.0
+	google.golang.org/protobuf v1.28.0
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 )
 
 require (
@@ -69,10 +74,8 @@ require (
 	github.com/sasha-s/go-deadlock v0.2.1-0.20190427202633-1595213edefa // indirect
 	github.com/spf13/afero v1.8.2 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
-	github.com/spf13/cobra v1.2.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/spf13/viper v1.11.0 // indirect
 	github.com/subosito/gotenv v1.2.0 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20200815110645-5c35d600f0ca // indirect
 	github.com/tecbot/gorocksdb v0.0.0-20191217155057-f0fad39f321c // indirect
@@ -81,10 +84,8 @@ require (
 	github.com/tendermint/tm-db v0.6.6 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
 	google.golang.org/genproto v0.0.0-20220407144326-9054f6ed7bac // indirect
-	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/ini.v1 v1.66.4 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
 
 require (