Added param:<name> lookup option to JWT Middleware (#1296)

* Added  lookup option to JWT Middleware

* Added param:<name> lookup option to JWT Middleware

middleware/jwt.go

@@ -52,6 +52,7 @@ type (
 		// Possible values:
 		// - "header:<name>"
 		// - "query:<name>"
+		// - "param:<name>"
 		// - "cookie:<name>"
 		TokenLookup string
 
@@ -155,6 +156,8 @@ func JWTWithConfig(config JWTConfig) echo.MiddlewareFunc {
 	switch parts[0] {
 	case "query":
 		extractor = jwtFromQuery(parts[1])
+	case "param":
+		extractor = jwtFromParam(parts[1])
 	case "cookie":
 		extractor = jwtFromCookie(parts[1])
 	}
@@ -228,6 +231,17 @@ func jwtFromQuery(param string) jwtExtractor {
 	}
 }
 
+// jwtFromParam returns a `jwtExtractor` that extracts token from the url param string.
+func jwtFromParam(param string) jwtExtractor {
+	return func(c echo.Context) (string, error) {
+		token := c.Param(param)
+		if token == "" {
+			return "", ErrJWTMissing
+		}
+		return token, nil
+	}
+}
+
 // jwtFromCookie returns a `jwtExtractor` that extracts token from the named cookie.
 func jwtFromCookie(name string) jwtExtractor {
 	return func(c echo.Context) (string, error) {

middleware/jwt_test.go

@@ -159,6 +159,14 @@ func TestJWT(t *testing.T) {
 			expErrCode: http.StatusBadRequest,
 			info:       "Empty query",
 		},
+		{
+			config: JWTConfig{
+				SigningKey:  validKey,
+				TokenLookup: "param:jwt",
+			},
+			reqURL: "/" + token,
+			info:   "Valid param method",
+		},
 		{
 			config: JWTConfig{
 				SigningKey:  validKey,
@@ -195,6 +203,11 @@ func TestJWT(t *testing.T) {
 		req.Header.Set(echo.HeaderCookie, tc.hdrCookie)
 		c := e.NewContext(req, res)
 
+		if tc.reqURL == "/" + token {
+			c.SetParamNames("jwt")
+			c.SetParamValues(token)
+		}
+
 		if tc.expPanic {
 			assert.Panics(t, func() {
 				JWTWithConfig(tc.config)