github.com/tickoalcantara12/micro/v3@v3.0.0-20221007104245-9d75b9bcbab9/service/api/resolver/vpath/vpath.go (about)

     1  // Copyright 2020 Asim Aslam
     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  //     https://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  // Original source: github.com/micro/go-micro/v3/api/resolver/vpath/vpath.go
    16  
    17  // Package vpath resolves using http path and recognised versioned urls
    18  package vpath
    19  
    20  import (
    21  	"errors"
    22  	"net/http"
    23  	"regexp"
    24  	"strings"
    25  
    26  	"github.com/tickoalcantara12/micro/v3/service/api/resolver"
    27  )
    28  
    29  func NewResolver(opts ...resolver.Option) resolver.Resolver {
    30  	return &Resolver{opts: resolver.NewOptions(opts...)}
    31  }
    32  
    33  type Resolver struct {
    34  	opts resolver.Options
    35  }
    36  
    37  var (
    38  	re = regexp.MustCompile("^v[0-9]+$")
    39  )
    40  
    41  func (r *Resolver) Resolve(req *http.Request, opts ...resolver.ResolveOption) (*resolver.Endpoint, error) {
    42  	if req.URL.Path == "/" {
    43  		return nil, errors.New("unknown name")
    44  	}
    45  
    46  	options := resolver.NewResolveOptions(opts...)
    47  
    48  	parts := strings.Split(req.URL.Path[1:], "/")
    49  	if len(parts) == 1 {
    50  		return &resolver.Endpoint{
    51  			Name:   r.withPrefix(parts...),
    52  			Host:   req.Host,
    53  			Method: req.Method,
    54  			Path:   req.URL.Path,
    55  			Domain: options.Domain,
    56  		}, nil
    57  	}
    58  
    59  	// /v1/foo
    60  	if re.MatchString(parts[0]) {
    61  		return &resolver.Endpoint{
    62  			Name:   r.withPrefix(parts[0:2]...),
    63  			Host:   req.Host,
    64  			Method: req.Method,
    65  			Path:   req.URL.Path,
    66  			Domain: options.Domain,
    67  		}, nil
    68  	}
    69  
    70  	return &resolver.Endpoint{
    71  		Name:   r.withPrefix(parts[0]),
    72  		Host:   req.Host,
    73  		Method: req.Method,
    74  		Path:   req.URL.Path,
    75  		Domain: options.Domain,
    76  	}, nil
    77  }
    78  
    79  func (r *Resolver) String() string {
    80  	return "path"
    81  }
    82  
    83  // withPrefix transforms "foo" into "go.micro.api.foo"
    84  func (r *Resolver) withPrefix(parts ...string) string {
    85  	p := r.opts.ServicePrefix
    86  	if len(p) > 0 {
    87  		parts = append([]string{p}, parts...)
    88  	}
    89  
    90  	return strings.Join(parts, ".")
    91  }