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75 lines
1.4 KiB
Go
75 lines
1.4 KiB
Go
// Package disco controls interaction with the rqlite Discovery service
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package disco
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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)
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// Response represents the response returned by a Discovery Service.
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type Response struct {
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CreatedAt string `json:"created_at"`
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DiscoID string `json:"disco_id"`
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Nodes []string `json:"nodes"`
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}
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// Client provides a Discovery Service client.
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type Client struct {
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url string
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}
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// New returns an initialized Discovery Service client.
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func New(url string) *Client {
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return &Client{
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url: url,
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}
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}
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// URL returns the Discovery Service URL used by this client.
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func (c *Client) URL() string {
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return c.url
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}
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// Register attempts to register with the Discovery Service, using the given
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// address.
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func (c *Client) Register(id, addr string) (*Response, error) {
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m := map[string]string{
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"addr": addr,
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}
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b, err := json.Marshal(m)
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if err != nil {
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return nil, err
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}
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url := c.registrationURL(id)
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resp, err := http.Post(url, "application-type/json", bytes.NewReader(b))
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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b, err = ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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return nil, errors.New(resp.Status)
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}
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r := &Response{}
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if err := json.Unmarshal(b, r); err != nil {
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return nil, err
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}
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return r, nil
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}
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func (c *Client) registrationURL(id string) string {
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return fmt.Sprintf("%s/%s", c.url, id)
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}
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