ng-spring-boot | Spring boot Spring Data JPA AngularJS example | Object-Relational Mapping library
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QUESTION
I am working with Keycloak 16.1.0, spring boot 2.6.2 and an external application client that sends a bearer token in to my server application to the endpoint http://romanmed-host:8888/actuator/health.
By cranking the debugging level up to maximum, I can see the access token before its processed. I can verify that its accurate by using the JWT Debug site JSON Web Tokens to verify that the signature is correct.
Yet several lines later in the output log the same bearer token appears to be somewhat truncated, its listed with an error saying that it failed to verify. When checked by using the JWT site indicates a signature error, but the token content is correct.
Naturally I would like to know why it appears to be truncated and what I can do about it.
- I can match the output from the client program to the server and its not been changed, so truncation must occur within the server program.
- The program is accepting the request by a get request, since the token can be checked by JWT as valid at this point, its not truncated by the get request input method.
- I have not inserted a filter in the security filter chain, so I can see how any of my code could be doing anything to invalid the token.
- Other than the
Failed to verify tokenno other error messages are generated, suggesting that until this point everything is correct.
I can see that the WebAsyncManagerIntegrationFilter, SecurityContextPersistenceFilter, HeaderWriterFilter,KeycloakPreAuthActionsFilter and KeycloakAuthenticationProcessingFilter have all been invoked.
I am assuming that the problem is somewhere within the KeycloakAuthenticationProcessingFilter, but I don't understand why the token appears to have been truncated at this point.
The received bearer token is
eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJ3dUhKc1pvWnduelVsU1Zqc2JyTkxsbUNhR0ZIVkV0cTcyQkI5V0pORTVVIn0.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.fwQPLiSIrUSjnRnTBrd1vvGic49OSf7aGDemc0TdmTshZzJ-eYhiEqnAh9-QU2rxDayPIhoIzA9CgBXmGPCnl1Qu4CujDddpBcLpnjszBoBdzwjDgpShgwFpGk0fGCM0fxtSZgMWRfeS_sRjBpRzZ42GelCYZ2E1kZX_E7o_LB3thpiv5oYqgTNucusNmzpm0-iFcEUe5rfnu2ZOHI_hLQvIYKlGURnNld4jov-KDLf2QTh2h3XqjbsGHG9PDq4MbFPhKY_9yF0jQkhF6F3oYrw9MIH4SbemrR-CHw6-aWqGmgucjJ7iKMY5o86HxLPu2tzM06NdaurQZX4ImLCBlQ
Its truncated format is
eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJ3dUhKc1pvWnduelVsU1Zqc2JyTkxsbUNhR0ZIVkV0cTcyQkI5V0pORTVVIn0.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
The debug log is
...ANSWER
Answered 2022-Mar-07 at 08:32The problem is the set up of the client and server programs.
The server used the value
auth-server-url: http://localhost:8085/auth
in its application.yml file to define the location of the Keycloak server, the client used the value
auth-server-url: http://romanmed-host:8085/auth
to define the location of Keycloak where the machine name romanmed-host is an alias for localhost. Having changed these values to be the same value, everything works as expected.
The diagnostics generated by the debugging/trace code are confusing, string described as truncated header seems to be truncated the bearer token, with out the signature. What the 'Keycloak` diagnostic is attempting to print is the part of the token which defines the tokens permissions and not the signature section.
Running the entire bearer token through the JWT site does show that the token is valid, because its a correctly encoded token and is legitimate.
The problem is not the token, but the way the token is being used! The client was expecting a legal signed token generated by them instance of Keycloak that it knew about, what it got was a legal signed token generated by Keycloak with a different address, which it correctly objected to.
The problem being the nature of the generated error message, it just claimed that the token signature was invalid, had it said something about an invalid/unexpected hostname, the nature of the problem would have been rather more obvious and resolved much faster. Keycloak is design to be flexible, so error messages tend to more vague to cover all situations, hence the message there is something wrong with your bearer token signature which is correct, but vague.
There seems to several schools of thought on how to resolve issues like this, one is to use an raw ip address which will always resolve to the same value. Thus avoid problems like this. This suffers from if the Keycloak server is moved to another machine there are lots of values to change.
My solution is to define an alias value in the hosts/dns server for the address of the eycloak server and always use that value in the support files. Hence if the Keycloak server is ever moved to another address, there is only one value to change.
QUESTION
I'm working through the book Learning Spring Boot 2.0, Second Edition but using Spring Boot 2.5.6 so I suspect my issue might be related to me having to do things slightly with the different version.
I have this class:
...ANSWER
Answered 2021-Nov-25 at 15:23I guess you're trying to init your database on the startup.
You can leverage the spring internal event mechanism.
When your application is ready, spring triggers the event ApplicationReadyEvent
You can listen to this event and init your collection:
QUESTION
Configuring the GitHub Action to build a image of this project I am getting this error:
...ANSWER
Answered 2021-Oct-18 at 17:05ADD includes content from your build context into the image, it does not copy files within your image. For the latter, just do a RUN cp ... command, e.g.
QUESTION
In my Java app that based on Spring Boot, I am trying to implement a caching mechanism for the following service method:
...ANSWER
Answered 2021-Sep-13 at 12:42You should put your SimpleCacheCustomizer along with your others Spring configuration class. That way, your component will be scanned and loaded by Spring.
QUESTION
The title says it all. Is it possible to get spring-cloud-starter-sleuth working together with axon-tracing-spring-boot-starter?
current log output:
...ANSWER
Answered 2021-Jun-03 at 15:25It seems axon-tracing-spring-boot-starter is using OpenTracing. OpenTracing is a tracing library that was abandoned and it has never reached a GA/stable release. So even if there would be an easy way, I would not use OpenTracing in production, I would try to move away from it.
From version 3.0, Spring Cloud Sleuth has abstracted the tracer away and it supports multiple tracer implementations. By default it supports Brave which is a mature tracing library but Sleuth has support for OpenTelemetry as well (Sleuth-OTel). The OpenTelemetry support is incubating and it is not recommended to use in prod since OpenTelemetry Tracing is not entirely stable/GA yet for Java.
With this, your options are:
- Add support to Axon for Brave
This is what I would recommend, I would start with opening an issue for them - OpenTelemetry theoretically compatible with OpenTracing (check the OpenTelemetry docs)
You might be able to use Sleuth-OTel and OpenTracing The problem with this is: OpenTracing is abandoned and never went GA, OpenTelemetry Java Tracing is not stable yet, Sleuth-OTel is not stable yet - You can implement OpenTracing support for Sleuth
I think this is a bad idea, it is a lot of work and OpenTracing is abandoned and never went GA
QUESTION
I'm on my early days working with Spring and Hibernate and apologies if I'm missing something obvious here but I am a bit confused why I can see an id set for my variable inside a hibernate_interceptor object shown under the debugging tool but it's null for the same variable outside of it.
This comes from a many to many relationship that exists between the Question and User entities but I've noticed this happening for other relationships as well and it's blocking me from being able to save the new row to my join table.
...ANSWER
Answered 2021-Mar-08 at 13:03Hibernate creates proxy classes for your entities to implement lazy loading. The proxy classes are just subclasses of your entity classes that delegate all access through the interceptor to lazy load on the first access to not yet loaded state. Due to object identity guarantees Hibernate has to provide according to the JPA specification, you see the proxy object rather than the real entity. If an entity with a certain id is associated with a persistence context once, it has to always return that object while the object is managed by that persistence context.
So this entity was proxied by some lazy to-one association of a different entity or by using entityManager.getReference. When the collection association for questionFavouriteEntity is loaded, it sees that the object is part of the persistence context already and uses that object.
QUESTION
Spring uses Jackson's InstantSerializer to write out my Instant fields like this:
...ANSWER
Answered 2021-Apr-07 at 16:20For that you could use @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss[.SSS]")
Full example:
QUESTION
I want to provide a specific Bean, so that this Bean overrides the Bean in a Spring Cloud AutoConfiguration class.
First try
Therefore I've created a Configuration class:
...ANSWER
Answered 2021-May-09 at 09:12In the main class add @SpringBootApplication(scanBasePackages = ....) so the customized package will be scanned this annotation just tell spring where to search.
QUESTION
I want to use @JsonTest to write tests on JSON serialization for my library. However, when I add the annotation to a test, I get:
Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test
As this is a library, I indeed don't have a main class annotated with @SpringBootConfiguration. How can I avoid that I need to introduce this just to get the testing framework going?
ANSWER
Answered 2021-May-04 at 09:30Seems the only way is to actually add a dummy application. In my case, I added this into src/test/java to avoid it will end up in the production sources. So something like this:
QUESTION
Using this link - https://dzone.com/articles/configuring-spring-boot-for-microsoft-sql-server
I created a simple spring boot project to create a table in MSSQL version 13.0.5865.1 and getting the below error:
...ANSWER
Answered 2021-Mar-03 at 01:22Spring Boot Connect to Microsoft SQL Server Examples.
Use this dependency definition for the SQL Server JDBC Driver.
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