下面的代碼會報告錯誤
def inviteQrCode(){
String scene = userService.generateInvitationParams(currentUser)
def qrCodeImage = wxApiService.createQrCode(scene)
response.contentType = "image/jpeg"
response.outputStream.write(qrCodeImage)
}
報錯:
javax.servlet.ServletException: Could not resolve view with name 'inviteQrCode' in servlet with name 'grailsDispatcherServlet'
因爲 REST API plugin 還會根據約定去查找 view,但是找不到,於是報錯。我們需要顯式地告訴 grails,不需要再查找 view 了,我們直接返回了字節數據。這可以使用 render 方法來實現,正確的代碼:
def inviteQrCode(){
String scene = userService.generateInvitationParams(currentUser)
def qrCodeImage = wxApiService.createQrCode(scene)
render file: qrCodeImage, contentType: "image/jpeg"
}