github.com/cs3org/reva/v2@v2.27.7/internal/http/services/helloworld/helloworld.go (about)

     1  // Copyright 2018-2021 CERN
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  // In applying this license, CERN does not waive the privileges and immunities
    16  // granted to it by virtue of its status as an Intergovernmental Organization
    17  // or submit itself to any jurisdiction.
    18  
    19  package helloworld
    20  
    21  import (
    22  	"net/http"
    23  
    24  	"github.com/cs3org/reva/v2/pkg/appctx"
    25  	"github.com/cs3org/reva/v2/pkg/rhttp/global"
    26  	"github.com/mitchellh/mapstructure"
    27  	"github.com/rs/zerolog"
    28  )
    29  
    30  func init() {
    31  	global.Register("helloworld", New)
    32  }
    33  
    34  // New returns a new helloworld service
    35  func New(m map[string]interface{}, log *zerolog.Logger) (global.Service, error) {
    36  	conf := &config{}
    37  	if err := mapstructure.Decode(m, conf); err != nil {
    38  		return nil, err
    39  	}
    40  
    41  	conf.init()
    42  
    43  	return &svc{conf: conf}, nil
    44  }
    45  
    46  // Close performs cleanup.
    47  func (s *svc) Close() error {
    48  	return nil
    49  }
    50  
    51  type config struct {
    52  	Prefix       string `mapstructure:"prefix"`
    53  	HelloMessage string `mapstructure:"message"`
    54  }
    55  
    56  func (c *config) init() {
    57  	if c.HelloMessage == "" {
    58  		c.HelloMessage = "Hello World!"
    59  	}
    60  
    61  	if c.Prefix == "" {
    62  		c.Prefix = "helloworld"
    63  	}
    64  }
    65  
    66  type svc struct {
    67  	conf *config
    68  }
    69  
    70  func (s *svc) Prefix() string {
    71  	return s.conf.Prefix
    72  }
    73  
    74  func (s *svc) Unprotected() []string {
    75  	return []string{"/"}
    76  }
    77  
    78  func (s *svc) Handler() http.Handler {
    79  	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    80  		log := appctx.GetLogger(r.Context())
    81  		if _, err := w.Write([]byte(s.conf.HelloMessage)); err != nil {
    82  			log.Err(err).Msg("error writing response")
    83  		}
    84  	})
    85  }