80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
// Package http resolves names to network addresses using a http request
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package http // import "go.unistack.org/micro/v3/resolver/http"
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import (
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"encoding/json"
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"errors"
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"io"
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"net/http"
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"net/url"
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"go.unistack.org/micro/v3/resolver"
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)
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// nolint: golint,revive
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// HTTPResolver is a HTTP network resolver
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type HTTPResolver struct {
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// Proto if not set, defaults to http
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Proto string
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// Path sets the path to lookup. Defaults to /network
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Path string
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// Host url to use for the query
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Host string
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}
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// Response contains resolver.Record
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type Response struct {
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Nodes []*resolver.Record `json:"nodes,omitempty"`
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}
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// Resolve assumes ID is a domain which can be converted to a http://name/network request
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func (r *HTTPResolver) Resolve(name string) ([]*resolver.Record, error) {
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proto := "http"
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host := "localhost:8080"
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path := "/network/nodes"
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if len(r.Proto) > 0 {
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proto = r.Proto
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}
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if len(r.Path) > 0 {
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path = r.Path
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}
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if len(r.Host) > 0 {
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host = r.Host
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}
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uri := &url.URL{
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Scheme: proto,
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Path: path,
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Host: host,
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}
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q := uri.Query()
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q.Set("name", name)
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uri.RawQuery = q.Encode()
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// nolint: noctx
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rsp, err := http.Get(uri.String())
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if err != nil {
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return nil, err
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}
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defer rsp.Body.Close()
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if rsp.StatusCode != 200 {
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return nil, errors.New("non 200 response")
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}
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b, err := io.ReadAll(rsp.Body)
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if err != nil {
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return nil, err
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}
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// encoding format is assumed to be json
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var response *Response
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if err := json.Unmarshal(b, &response); err != nil {
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return nil, err
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}
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return response.Nodes, nil
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}
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