github.com/lastbackend/toolkit@v0.0.0-20241020043710-cafa37b95aad/examples/http/main.go (about)

     1  /*
     2  Copyright [2014] - [2023] The Last.Backend authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"github.com/lastbackend/toolkit/pkg/server/http/marshaler/jsonpb"
    23  	"google.golang.org/protobuf/encoding/protojson"
    24  	"io"
    25  	"net/http"
    26  	"os"
    27  
    28  	servicepb "github.com/lastbackend/toolkit/examples/http/gen/server"
    29  	"github.com/lastbackend/toolkit/pkg/runtime"
    30  )
    31  
    32  func HealthCheckHandler(w http.ResponseWriter, r *http.Request) {
    33  	w.Header().Set("Content-Type", "application/json")
    34  	w.WriteHeader(http.StatusOK)
    35  	if _, err := io.WriteString(w, `{"alive": true}`); err != nil {
    36  		fmt.Println(err)
    37  	}
    38  }
    39  
    40  func main() {
    41  	// define service with name and options
    42  	app, err := servicepb.NewHttpService("http",
    43  		runtime.WithVersion("0.1.0"),
    44  		runtime.WithDescription("Example http server"),
    45  		runtime.WithEnvPrefix("LB"),
    46  	)
    47  	if err != nil {
    48  		fmt.Println(err)
    49  	}
    50  
    51  	// Register marshaller
    52  	jsonPb := &jsonpb.JSONPb{
    53  		UnmarshalOptions: protojson.UnmarshalOptions{
    54  			DiscardUnknown: true,
    55  		},
    56  	}
    57  
    58  	if err = app.Server().HTTP().UseMarshaler("application/json", jsonPb); err != nil {
    59  		app.Log().Errorf("could not use json marshaler %v", err)
    60  		os.Exit(1)
    61  		return
    62  	}
    63  
    64  	// Add server
    65  	app.Server().HTTP().AddHandler(http.MethodGet, "/health", HealthCheckHandler)
    66  
    67  	// Logger settings
    68  	app.Log().Info("Run http server")
    69  
    70  	// Service run
    71  	if err := app.Start(context.Background()); err != nil {
    72  		app.Log().Errorf("could not run the service %v", err)
    73  		os.Exit(1)
    74  		return
    75  	}
    76  
    77  	app.Log().Info("graceful stop")
    78  }