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Merge pull request #4 from influxdata/feature/http-backend
HTTP Backend
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package backend | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/sha256" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "time" | ||
| ) | ||
|
|
||
| type BasicAuth struct { | ||
| Username string | ||
| Password string | ||
| } | ||
| type HTTPBackend struct { | ||
| client *http.Client | ||
| baseurl string | ||
| BasicAuth *BasicAuth | ||
| } | ||
|
|
||
| func NewHTTPBackend(baseurl string) (*HTTPBackend, error) { | ||
| var transportWithTimeout = &http.Transport{ | ||
| Dial: (&net.Dialer{ | ||
| Timeout: 5 * time.Second, | ||
| }).Dial, | ||
| TLSHandshakeTimeout: 5 * time.Second, | ||
| } | ||
| return &HTTPBackend{ | ||
| client: &http.Client{ | ||
| Timeout: time.Second * 10, | ||
| Transport: transportWithTimeout, | ||
| }, | ||
| baseurl: baseurl, | ||
| }, nil | ||
| } | ||
|
|
||
| func publicKeySHA256(key []byte) string { | ||
| h := sha256.New() | ||
| h.Write(key) | ||
| return fmt.Sprintf("%x", h.Sum(nil)) | ||
| } | ||
|
|
||
| func (b *HTTPBackend) Join(ifname string, p Peer) error { | ||
| joinURL := fmt.Sprintf("%s/%s/%s", b.baseurl, ifname, publicKeySHA256(p.PublicKey)) | ||
|
|
||
| jsonPeer, err := json.Marshal(p) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| buf := bytes.NewBuffer(jsonPeer) | ||
| req, err := http.NewRequest("POST", joinURL, buf) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if b.BasicAuth != nil { | ||
| req.SetBasicAuth(b.BasicAuth.Username, b.BasicAuth.Password) | ||
| } | ||
|
|
||
| res, err := b.client.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("request error during join: %s", err.Error()) | ||
| } | ||
|
|
||
| if res.StatusCode != http.StatusCreated { | ||
| return fmt.Errorf("the join http request gave an unexpected status code: %d", res.StatusCode) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (b *HTTPBackend) GetPeers(ifname string) ([]Peer, error) { | ||
| getPeersURL := fmt.Sprintf("%s/%s", b.baseurl, ifname) | ||
|
|
||
| req, err := http.NewRequest("GET", getPeersURL, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if b.BasicAuth != nil { | ||
| req.SetBasicAuth(b.BasicAuth.Username, b.BasicAuth.Password) | ||
| } | ||
|
|
||
| res, err := b.client.Do(req) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("request error during get peers: %s", err.Error()) | ||
| } | ||
|
|
||
| if res.StatusCode != http.StatusOK { | ||
| return nil, fmt.Errorf("the get peers http request gave an unexpected status code: %d", res.StatusCode) | ||
| } | ||
|
|
||
| peers := []Peer{} | ||
| err = json.NewDecoder(res.Body).Decode(&peers) | ||
|
|
||
| if err != nil { | ||
| return nil, fmt.Errorf("error decoding peers during get peers: %s", err.Error()) | ||
| } | ||
|
|
||
| return peers, nil | ||
| } |
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