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user_claims_provider.go
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/
user_claims_provider.go
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package login
import (
"encoding/json"
"io/ioutil"
"net/http"
"net/url"
"time"
jwt "github.com/golang-jwt/jwt/v4"
"github.com/kernle32dll/loginsrv/model"
"github.com/pkg/errors"
)
type userClaimsProvider struct {
url string
auth string
httpClient http.Client
}
func newUserClaimsProvider(url, auth string, timeout time.Duration) (*userClaimsProvider, error) {
if err := validateURL(url); err != nil {
return nil, err
}
return &userClaimsProvider{
url: url,
auth: auth,
httpClient: http.Client{Timeout: timeout},
}, nil
}
func (provider *userClaimsProvider) Claims(userInfo model.UserInfo) (jwt.Claims, error) {
claimsURL := provider.buildURL(userInfo)
req, _ := http.NewRequest(http.MethodGet, claimsURL, nil)
if provider.auth != "" {
req.Header.Add("Authorization", "Bearer "+provider.auth)
}
resp, err := provider.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() {
ioutil.ReadAll(resp.Body)
resp.Body.Close()
}()
if resp.StatusCode == http.StatusNotFound {
return customClaims(userInfo.AsMap()), nil
}
if resp.StatusCode != http.StatusOK {
return nil, errors.Errorf("bad http response code %d", resp.StatusCode)
}
decoder := json.NewDecoder(resp.Body)
remoteClaims := map[string]interface{}{}
err = decoder.Decode(&remoteClaims)
if err != nil {
return nil, err
}
return mergeClaims(userInfo, remoteClaims), nil
}
func (provider *userClaimsProvider) buildURL(userInfo model.UserInfo) string {
// error can be ignored, it was already checked in validateURL
u, _ := url.Parse(provider.url)
query := u.Query()
query.Add("sub", url.QueryEscape(userInfo.Sub))
if userInfo.Origin != "" {
query.Add("origin", url.QueryEscape(userInfo.Origin))
}
if userInfo.Domain != "" {
query.Add("domain", url.QueryEscape(userInfo.Domain))
}
if userInfo.Email != "" {
query.Add("email", url.QueryEscape(userInfo.Email))
}
if len(userInfo.Groups) > 0 {
for _, group := range userInfo.Groups {
query.Add("group", url.QueryEscape(group))
}
}
u.RawQuery = query.Encode()
return u.String()
}
func mergeClaims(userInfo model.UserInfo, remoteClaims map[string]interface{}) customClaims {
claims := customClaims(userInfo.AsMap())
claims.merge(remoteClaims)
return claims
}
func validateURL(s string) error {
_, err := url.Parse(s)
return errors.Wrap(err, "invalid claims provider url")
}