Grand test fixup (#138)

* start fixing up tests

* fix up tests + automate with drone

* fiddle with linting

* messing about with drone.yml

* some more fiddling

* hmmm

* add cache

* add vendor directory

* verbose

* ci updates

* update some little things

* update sig

vendor/github.com/superseriousbusiness/oauth2/v4/server/handler.go

@@ -0,0 +1,66 @@
+package server
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/superseriousbusiness/oauth2/v4"
+	"github.com/superseriousbusiness/oauth2/v4/errors"
+)
+
+type (
+	// ClientInfoHandler get client info from request
+	ClientInfoHandler func(r *http.Request) (clientID, clientSecret string, err error)
+
+	// ClientAuthorizedHandler check the client allows to use this authorization grant type
+	ClientAuthorizedHandler func(clientID string, grant oauth2.GrantType) (allowed bool, err error)
+
+	// ClientScopeHandler check the client allows to use scope
+	ClientScopeHandler func(clientID, scope string) (allowed bool, err error)
+
+	// UserAuthorizationHandler get user id from request authorization
+	UserAuthorizationHandler func(w http.ResponseWriter, r *http.Request) (userID string, err error)
+
+	// PasswordAuthorizationHandler get user id from username and password
+	PasswordAuthorizationHandler func(username, password string) (userID string, err error)
+
+	// RefreshingScopeHandler check the scope of the refreshing token
+	RefreshingScopeHandler func(newScope, oldScope string) (allowed bool, err error)
+
+	//RefreshingValidationHandler check if refresh_token is still valid. eg no revocation or other
+	RefreshingValidationHandler func(ti oauth2.TokenInfo) (allowed bool, err error)
+
+	// ResponseErrorHandler response error handing
+	ResponseErrorHandler func(re *errors.Response)
+
+	// InternalErrorHandler internal error handing
+	InternalErrorHandler func(err error) (re *errors.Response)
+
+	// AuthorizeScopeHandler set the authorized scope
+	AuthorizeScopeHandler func(w http.ResponseWriter, r *http.Request) (scope string, err error)
+
+	// AccessTokenExpHandler set expiration date for the access token
+	AccessTokenExpHandler func(w http.ResponseWriter, r *http.Request) (exp time.Duration, err error)
+
+	// ExtensionFieldsHandler in response to the access token with the extension of the field
+	ExtensionFieldsHandler func(ti oauth2.TokenInfo) (fieldsValue map[string]interface{})
+)
+
+// ClientFormHandler get client data from form
+func ClientFormHandler(r *http.Request) (string, string, error) {
+	clientID := r.Form.Get("client_id")
+	if clientID == "" {
+		return "", "", errors.ErrInvalidClient
+	}
+	clientSecret := r.Form.Get("client_secret")
+	return clientID, clientSecret, nil
+}
+
+// ClientBasicHandler get client data from basic authorization
+func ClientBasicHandler(r *http.Request) (string, string, error) {
+	username, password, ok := r.BasicAuth()
+	if !ok {
+		return "", "", errors.ErrInvalidClient
+	}
+	return username, password, nil
+}