76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
// Package vpath resolves using http path and recognised versioned urls
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package vpath // import "go.unistack.org/micro/v3/api/resolver/vpath"
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import (
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"errors"
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"net/http"
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"regexp"
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"strings"
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"go.unistack.org/micro/v3/api/resolver"
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)
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// NewResolver creates new vpath api resolver
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func NewResolver(opts ...resolver.Option) resolver.Resolver {
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return &vpathResolver{opts: resolver.NewOptions(opts...)}
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}
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type vpathResolver struct {
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opts resolver.Options
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}
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var re = regexp.MustCompile("^v[0-9]+$")
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// Resolve endpoint
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func (r *vpathResolver) Resolve(req *http.Request, opts ...resolver.ResolveOption) (*resolver.Endpoint, error) {
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if req.URL.Path == "/" {
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return nil, errors.New("unknown name")
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}
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options := resolver.NewResolveOptions(opts...)
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parts := strings.Split(req.URL.Path[1:], "/")
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if len(parts) == 1 {
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return &resolver.Endpoint{
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Name: r.withPrefix(parts...),
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Host: req.Host,
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Method: req.Method,
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Path: req.URL.Path,
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Domain: options.Domain,
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}, nil
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}
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// /v1/foo
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if re.MatchString(parts[0]) {
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return &resolver.Endpoint{
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Name: r.withPrefix(parts[0:2]...),
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Host: req.Host,
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Method: req.Method,
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Path: req.URL.Path,
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Domain: options.Domain,
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}, nil
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}
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return &resolver.Endpoint{
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Name: r.withPrefix(parts[0]),
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Host: req.Host,
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Method: req.Method,
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Path: req.URL.Path,
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Domain: options.Domain,
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}, nil
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}
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func (r *vpathResolver) String() string {
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return "vpath"
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}
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// withPrefix transforms "foo" into "go.micro.api.foo"
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func (r *vpathResolver) withPrefix(parts ...string) string {
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p := r.opts.ServicePrefix
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if len(p) > 0 {
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parts = append([]string{p}, parts...)
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}
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return strings.Join(parts, ".")
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}
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