147 lines
3.3 KiB
Go
147 lines
3.3 KiB
Go
package http01
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import (
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"bytes"
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"context"
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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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"log"
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"net/http"
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"net/url"
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"path"
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"time"
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"github.com/mholt/acmez/acme"
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)
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// Config is used to configure the creation of the HTTP-01 Solver.
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type Config struct {
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Endpoint *url.URL
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Tokener func() string
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HTTPClient *http.Client
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}
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// Solver implements the challenge.Provider interface.
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type Solver struct {
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config *Config
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}
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// Challenge is an ACME http-01 challenge
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type Challenge struct {
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Type string `json:"type"`
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Token string `json:"token"`
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KeyAuthorization string `json:"key_authorization"`
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Identifier Identifier `json:"identifier"`
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}
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// Identifier is restricted to DNS Domain Names for now
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type Identifier struct {
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Type string `json:"type"`
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Value string `json:"value"`
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}
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// NewSolver return a new HTTP-01 Solver.
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func NewSolver(config *Config) (*Solver, error) {
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if config == nil {
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return nil, errors.New("api: the configuration of the DNS provider is nil")
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}
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if config.Endpoint == nil {
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return nil, errors.New("api: the endpoint is missing")
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}
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if nil == config.HTTPClient {
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config.HTTPClient = &http.Client{
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Timeout: 5 * time.Second,
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}
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}
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return &Solver{config: config}, nil
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}
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// Present creates a HTTP-01 Challenge Token
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func (s *Solver) Present(ctx context.Context, ch acme.Challenge) error {
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log.Println("Present HTTP-01 challenge solution for", ch.Identifier.Value)
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msg := &Challenge{
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Type: "http-01",
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Token: ch.Token,
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KeyAuthorization: ch.KeyAuthorization,
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Identifier: Identifier{
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Type: ch.Identifier.Type,
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Value: ch.Identifier.Value,
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},
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}
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err := s.doRequest(http.MethodPost, fmt.Sprintf("/%s", msg.Identifier.Value), msg)
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if err != nil {
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return fmt.Errorf("api: %w", err)
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}
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return nil
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}
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// CleanUp deletes an HTTP-01 Challenge Token
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func (s *Solver) CleanUp(ctx context.Context, ch acme.Challenge) error {
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log.Println("CleanUp HTTP-01 challenge solution for", ch.Identifier.Value)
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msg := &Challenge{
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Type: "http-01",
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Token: ch.Token,
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KeyAuthorization: ch.KeyAuthorization,
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Identifier: Identifier{
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Type: ch.Identifier.Type,
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Value: ch.Identifier.Value,
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},
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}
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err := s.doRequest(
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http.MethodDelete,
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fmt.Sprintf("/%s/%s/%s/%s", msg.Identifier.Value, msg.Token, msg.KeyAuthorization, msg.Type),
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nil,
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)
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if err != nil {
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return fmt.Errorf("api: %w", err)
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}
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return nil
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}
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func (s *Solver) doRequest(method, uri string, msg interface{}) error {
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data, _ := json.MarshalIndent(msg, "", " ")
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reqBody := bytes.NewBuffer(data)
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newURI := path.Join(s.config.Endpoint.EscapedPath(), uri)
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endpoint, err := s.config.Endpoint.Parse(newURI)
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if err != nil {
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return err
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}
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req, err := http.NewRequest(method, endpoint.String(), reqBody)
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if err != nil {
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return err
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}
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req.Header.Set("Content-Type", "application/json")
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apiToken := s.config.Tokener()
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if len(apiToken) > 0 {
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req.Header.Set("Authorization", "Bearer "+apiToken)
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}
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resp, err := s.config.HTTPClient.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode >= http.StatusBadRequest {
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return fmt.Errorf("%d: failed to read response body: %w", resp.StatusCode, err)
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}
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return fmt.Errorf("%d: request failed: %v", resp.StatusCode, string(body))
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}
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return nil
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}
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