The Spring Security example works and is clear. Vaadin has greatly improved integration with Spring security framework.
On the other side but it is not clear how the example can be modified. I made many attempts but got conflicts and errors.
I read there is no obligation to use the Vaadin Form, very well I would like to use my form, bare HTML generated with a servlet, let's say "my-login-form" endpoint. How can I actually insert it in the shown code so that Spring uses it as a login form and at the same Vaadin manages routes authorization?
Also, I would like to bypass or disable login during a test (without removing the spring-security dependency) and have all routes accessible. How can I do that?
Can anybody kindly provide an example?
I really appreciate any help you can provide.
Related
Currently learning Vaadin8+SpringBoot for Vaadin made me wanna forget about HTML for a while. Anyways, all is good for some CRUD operations until I mixed in SpringSecurity in the project. Well, I've been searching for days now and no solution could fit in well with the expected requirements.
Expected output:
Vaadin8+SpringBoot+SpringSecurity
All in one project/module/artifact
2 #SpringUI (MainUI = "", LoginUI = "/login")
Multiple #SpringViews contained by MainUI's ViewDisplay
Limitations:
No login.html (from the Vaadin's demo backery app)
No SpringMVC for login page
No vaadin4Spring dependency
Configurations done through annotations and not through XMLs
I know there's a way, I'm blocked how to progress on this. And if it's really not possible, need to understand as to why it isn't.
When you configure Spring Security, you need to allow anonymous access to the /login URL (either login.html if it is a non-vaadin form, or the login UI path if you want a separate UI for login). You also need to restrict access to the actual application UI. You also need to allow anonymous access to the static resources (i.e. /VAADIN/**).
The SecurityConfig in Bakery may give you a starting point. (Note: the starter or its parts cannot be redistributed as a code example or template)
There is a more detailed explanation here, though it only covers Vaadin and Spring Security integration (i.e. no spring-boot).
I am developing a jsp dynamic web project on eclipse.
I want to create an website with login functionality. I intend to store users' accounts and passwords in MySQL database. Of course, different users have different roles and rights to access different web pages. What is the best approach to implement it?
So far, I know these approaches:
1) Users enter accounts/passwords in login.jsp. LoginServlet then connects to MySQL database to check if it is correct. AuthenticationFilters will make sure only users with rights can access certain pages.
2) Use Role Based Authentication by declaring user roles in web.xml. I find this approach is not flexible, because I need to declare roles in advance.
3) Use HttpServletRequest's login/logout methods. I have not studied it.
Is my understanding correct? Could someone gives me some suggestions? Some clues would be very helpful!
Besides, I know that using POST alone to send passwords is not safe enough. Many websites suggest to use HTTPS connections. So if using HTTPS connections, does it affect the approach I choose to implement the login function?
Thanks!
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Now, I know I need to use Spring. But Spring seems difficult for me... In Spring website I cant find out the link to download jar files. The user guide says I need to use Gradle or Maven, which I haven't used before, and have no idea why I need them. Besides, there are many Spring projects. Which one should I choose? Spring framework?
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Have you looked into using Spring Security? It's built for just that. You don't need to be familiar with Spring but it may help.
Here are a couple of tutorials that use database authentication:
1: Spring Security Authentication and Authorization Example with Database Credentials
2: Spring Security Login Example with Database
Edit:
You don't have to Maven or Gradle. You can simply add the jars to your build path and they will work. The only projects you need to implement for the login to work is the Spring Framework and Spring Security.
To use Spring Security without Maven or Gradle:
Download the Spring Framework jars, unzip them, and add them to your project and build path. It's probably a good idea to find a hello world tutorial using Spring to get you started. A quick Google search should turn up many results.
After you have Spring implemented in your project, download the Spring Security jars, unzip those, and add them to your build path. The links to the tutorials that I previously posted will get you started. They may take a little while to go through and you may not understand exactly what is happening behind the scenes, but once you get it set up is works outstanding. I'm also not sure if you are using xml configuration or Java config but I believe those tutorials are for xml.
Spring Security was built so that it could be added to any project and have you up and running with basic configuration in about 15 minutes. After you get the basic login going (it will use the generic login form), you can search for how to implement your own custom login form, add permissions or restrictions to users and url patters, adding custom filters, etc. I encourage you to spend some time learning it as it is highly flexible and customizable.
I have been searching for an example Spring Webservice which is being protected using oauth 2.0..
Looking around I found https://github.com/spring-projects/spring-security-oauth/tree/master/samples/oauth2 but there some files seems to be missing from the project.
Two things that I am looking for is :
When user authenticates, user name and password goes to /login.do , now I can not understand how this Servlet is being configured, if its not controller. web.xml is missing.
When I try to see how beans configured then applicationContext.xml is also missing. I am not able to find those files in order to see how things are configured.
Help Required :
Should I use annotation in order to configure my web service or xml configuration. I am willing to use the latest version, and leverage advanced configurations, for better security.
I have another Single page application ( HTML5 ) , which accesses data from this spring web service, which is being hosted on Google App Engine. My ultimate objective is to create a chrome plugin of (html5) pages and use my service from there..
Please suggest a better path so that I can achieve my objectives.
Best regards,
Shashank Pratap
Apologize for late reply.
1) Regarding Oauth2.0 implementation : Since GAE does not support Servlet 3.0 therefore, developer is restricted to servlet 2.5. Therefore I found that we are restricted to 1.0.5.RELEASE. I was able to configure it successfully.
Best Practice on GAE : Rather than following this approach, I would suggest others to use Google Endpoints. As it supports oauth2.0 as well as we can develop REST API relatively quickly.
Scale ability and Response time : Since I was using Spring dependency injection along with spring security, application responded slower than the combination of Google Endpoints and Google Juice, as juice does injection just in time, where as spring prepares everything as soon as new instance starts, which created problem for me.
2) Chrome Plugin is completely different story. :-)
Please correct if I am wrong.
Thanks,
Shashank Pratap
I am keeping looking for an authencitation solution in java until I found AOP.
It seesm that the advise of the AOP can act as an interceptor of the required method executation. Which can be use or authentication and authorization.
And I have heard some solutions based on URL filtering, but IMO, the AOP is better since it will intercepte the logic rather then the request path.
Especially in an application which have multiple views like this:,
we can use only one authentication module to hold the whole application through AOP, but if we use the URL filtering, we have to make another authentication module for the "Client GUI View".
This is my opinion, I am not sure if this is right, please figure it out if I miss something.
And BTW, is there a live exmaple about AOP with authentication(Spring AOP is better)?
I don't think using AOP for authentication is a good idea.
You can use filters to check if an user is authenticated. Here you have an example of this:
How to redirect to Login page when Session is expired in Java web application?
Another approach, you can make use of Spring Security. It is quite simple and handle login for you. This guy shows well simple examples:
http://www.mkyong.com/spring-security/spring-security-form-login-example/
I wanted to know whether it is possible to have custom handler execution just before spring authentication manager. I wanted to validate licenses for the user before he access system. Initially i wrote custom filter and executed it before calling to authentication manager, but in this case he wont be able to access some resources since he is not authenticated, but later i moved my code to sucessHandler of spring which worked fine, except it has some security issues like if open in multiple tabs it fails.
Any help is highly appreciated.
Thanks,
Brijesh
I think what you are looking for is to add a Spring AuthenticationProvider. In short, an AuthenticationManager has a list of AuthenticationProviders, each of which is queried in order. The question and answer to Multiple Authentication Providers in Spring Security has a good explanation of this. The Spring documentation also explains how the various components fit together.