/
url_source.go
66 lines (58 loc) · 1.36 KB
/
url_source.go
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package config
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
)
// URLSource configures Common Fate from a deployment URL.
// The URL should be a config.json which contains discovery variables
// for a particular deployment.
type URLSource struct {
DeploymentURL *url.URL
configJSON *URLConfigJSON
}
// Load config variables.
func (u *URLSource) Load(key Key) (string, error) {
if u.configJSON == nil {
err := u.fetchConfig()
if err != nil {
return "", err
}
}
switch key {
case APIURLKey:
return u.configJSON.APIURL, nil
case OIDCClientIDKey:
return u.configJSON.CliOAuthClientId, nil
case OIDCIssuerKey:
return u.configJSON.OAauthIssuer, nil
case AccessURLKey:
return u.configJSON.AccessAPIURL, nil
}
return "", nil
}
func (u *URLSource) fetchConfig() error {
res, err := http.DefaultClient.Get(u.DeploymentURL.String())
if err != nil {
return fmt.Errorf("error fetching config from %s: %w", u.DeploymentURL.String(), err)
}
b, err := io.ReadAll(res.Body)
if err != nil {
return err
}
var cfg URLConfigJSON
err = json.Unmarshal(b, &cfg)
if err != nil {
return err
}
u.configJSON = &cfg
return nil
}
type URLConfigJSON struct {
CliOAuthClientId string `json:"cliOAuthClientId"`
OAauthIssuer string `json:"oauthIssuer"`
APIURL string `json:"apiUrl"`
AccessAPIURL string `json:"accessApiUrl"`
}