下面的代码会报告错误
def inviteQrCode(){
String scene = userService.generateInvitationParams(currentUser)
def qrCodeImage = wxApiService.createQrCode(scene)
response.contentType = "image/jpeg"
response.outputStream.write(qrCodeImage)
}
报错:
javax.servlet.ServletException: Could not resolve view with name 'inviteQrCode' in servlet with name 'grailsDispatcherServlet'
因为 REST API plugin 还会根据约定去查找 view,但是找不到,于是报错。我们需要显式地告诉 grails,不需要再查找 view 了,我们直接返回了字节数据。这可以使用 render 方法来实现,正确的代码:
def inviteQrCode(){
String scene = userService.generateInvitationParams(currentUser)
def qrCodeImage = wxApiService.createQrCode(scene)
render file: qrCodeImage, contentType: "image/jpeg"
}