Spring response logging filter
At this point there is one gotcha. In other words, when you call restTemplate. Also published on Medium. Android development has greatly improved since the early days.
Maybe you tried it out when Android development was done in Eclipse, emulators were slow and buggy, and Java was the required language. Things have changed. Adding a custom object to your liquibase diff is a pretty simple two step process. One problem.
Thanks for posting this, it has been helpful for debugging. Would be curious to know if you found a way around this though? I am thinking of programmatically not logging during unit test. Reading inputStream due StreamUtils. Seems like after response. Nice, I think this is formatted a little better from the StackOverflow answer this was copied from. This solution is good but it has one issue.
If you log every request and response, you will have a problem with memory. The bufferClientHttpRequestFactory allows the requests to be buffered which means they would be copied to memory so that the interceptors logger can read it. Your email address will not be published. Log your RestTemplate Request and Response without destroying the body.
By Scott Bock. Logger; import org. LoggerFactory; import org. HttpRequest; import org. ClientHttpRequestExecution; import org. ClientHttpRequestInterceptor; import org. ClientHttpResponse; import org. IOException; import java. Related Posts.Comment 0. That is, assuming we have a program listening in a URI, we can specify that we want to execute something before the requests are processed by the controller. This is very useful if we want all the requests to meet a requirement, for example, that they must include a specific header.
As usual, the best way to understand the concept is by writing an example program and explaining it. The source of the program that I have written below is on my GitHub page. This is the code for the class:. The SillyLog is a simple class where we add logs entries and then return them in the body response, so we will be able to see by where our request has gone. The first one has preference over the second because of the parameter passed in the label Order. I will speak more on the third filter later.
The first thing we have to do to define a general filter as it is tagged in the class with the label Component. We should also implement the Filter interface. Our class could also extend from OncePerRequestFilterwhich implements the interface Filter and adds some features. This is so that the filter is only executed once by request.
In this example, we are going to simplify it to the maximum and we will directly implement the Filter interface. The Filter interface has three functions.
This function will be executed by the web container, so it will be only executed once when the component is instantiated by Spring. This function will be executed each time an HTTP request is received.
As I mentioned earlier, the label Order allows us to specify the order in which each filter will be executed. In this case, the MyFilter filter will run before the OtherFilter filter. MyFilter class performs different actions depending on the URL called.
OtherFilter only adds a log when it is executed. In the example code, we use only the doFilter function. This is necessary in order to be able to access certain properties of objects that would not otherwise be available.
I'm going to explain, step by step, the different cases contemplated in the MyFilter class, depending on the URL invoked. It is important to emphasize that we can only modify the response if the request is unalterable.
This is after we run the DoFilter function of the chain class so that the flow is continued.I have been using the Spring RestTemplate for a while and I consistently hit a wall when I'am trying to debug it's requests and responses. I'm basically looking to see the same things as I see when I use curl with the "verbose" option turned on.
For example :. One way to do this would be to actually change the RestTemplate source code and add some extra logging statements there, but I would find this approach really a last resort thing. I believe this would be extremely useful for anyone that uses the Spring RestTemplate and has problems. Using curl to debug your RestTemplate problems just doesn't work in some cases. Adding to above discussion this only represents Happy scenarios.
In this case plus all the cases above you must override DefaultResponseErrorHandler and set it like below. As stated in the other responses, the response body needs special treatment so it can be read repeatedly by default, its contents get consumed on the first read. Instead of using the BufferingClientHttpRequestFactory when setting up the request, the interceptor itself can wrap the response and make sure the content is retained and can be repeatedly read by the logger as well as by the consumer of the response :.
Assuming RestTemplate is configured to use HttpClient 4. The loggers are different than those specified in the other answers. The logging configuration for HttpClient 3. The "best answer" by PaulSabou looks so so, since httpclient and all apache. Just to complete the example with a full implementation of ClientHttpRequestInterceptor to trace request and response:.Spring AOP tutorial - Part 1 - Aspect Oriented Programming Tutorial Part -1
The BufferingClientHttpRequestFactory is required as we want to use the response body both in the interceptor and for the initial calling code. The default implementation allows to read the response body only once. Paul Sabou provides a solution that seems realistic, but doesn't provide enough details to actually implement and it didn't work at all for me. Sofiene got the logging but with a critical problem: the response is no longer readable because the input stream has already been consumed!
I recommend using a BufferingClientHttpResponseWrapper to wrap the response object to allow reading the response body multiple times:.
Jersey Logging Request and Response Entities using Filter
This will not consume the InputStream because the response body is loaded into memory and can be read multiple times. If you do not have the BufferingClientHttpResponseWrapper on your classpath, you can find the simple implementation here:. Related to the response using ClientHttpInterceptor, I found a way of keeping the whole response without Buffering factories. Just store the response body input stream inside byte array using some utils method that will copy that array from body, but important, surround this method with try catch because it will break if response is empty that is the cause of Resource Access Exception and in catch just create empty byte array, and than just create anonymous inner class of ClientHttpResponse using that array and other parameters from the original response.
Than you can return that new ClientHttpResponse object to the rest template execution chain and you can log response using body byte array that is previously stored. That way you will avoid consuming InputStream in the actual response and you can use Rest Template response as it is. Note, this may be dangerous if your's response is too big. So many responses here require coding changes and customized classes and it really is not necessary.
Gte a debugging proxy such as fiddler and set your java environment to use the proxy on the command line -Dhttp. Also comes with many ancillary advantages such as the ability to tinker with the results and responses before and after they are sent to run experiments before committing to modification of the server.
Last bit of an issue that can come up is if you must use HTTPS, you will need to export the SSL cert from fiddler and import it into the java keystore cacerts hint: default java keystore password is usually "changeit".GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again.
If nothing happens, download the GitHub extension for Visual Studio and try again. Web page equivalent is here. Filter implements javax. Filter from Servlet API 3. Skip to content.
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Servlet filter for logging requests and responses. Java Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit Fetching latest commit…. Servlet logging filter Java 8 Servlet filter for logging requests and responses Web page equivalent is here Usage Filter implements javax.
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First version. Jun 7, Added travis CI. Mar 4, Added maven coordinates. Fixed doc. Mar 1, Aug 8, I am using spring boot Rest Microservices in my project, I need to log request and response with session ID, Date and time. After I used this code, the log work successfully.
However, the http did not get the response in the postman. Do you know the reason? The reason is you can read the Request or Response body only once and you already did in StubLoggingFilter. So response is not visible in Postman. If I try to log the request body in beforeRequest method, then It does not do anything. Do you know why? ResponseEntity in controller. This filter will cause an issue if the original filter is already a ContentCachingResponseWrapper.
It will clear the cached content by invoking copyToResponsewhich makes the filter who wraps the response with ContentCachingResponseWrapper loses the cached content in it. Skip to content. Instantly share code, notes, and snippets. Code Revisions 6 Stars 57 Forks Embed What would you like to do?
Embed Embed this gist in your website. Share Copy sharable link for this gist. Learn more about clone URLs. Download ZIP. Spring Web filter for logging request and response. Slf4j ; import lombok.
HttpStatus ; import org. MediaType ; import org. OncePerRequestFilter ; import org. ContentCachingRequestWrapper ; import org. ContentCachingResponseWrapper ; import javax. FilterChain ; import javax. ServletException ; import javax. HttpServletRequest ; import javax. HttpServletResponse ; import java.
IOException ; import java. UnsupportedEncodingException ; import java.
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If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Logbook is an extensible Java library to enable complete request and response logging for different client- and server-side technologies.
It satisfies a special need by a allowing web application developers to log any HTTP traffic that an application receives or sends b in a way that makes it easy to persist and analyze it later. This can be useful for traditional log analysis, meeting audit requirements or investigating individual historic traffic issues.
Log your RestTemplate Request and Response without destroying the body
Logbook is ready to use out of the box for most common setups. The logbook logger must be configured to trace level in order to log the requests and responses.
With Spring Boot 2 using Logback this can be accomplised by adding the following line to your application. All integrations require an instance of Logbook which holds all configuration and wires all necessary parts together. You can either create one using all the defaults:. Some of those restrictions could be mitigated with custom HttpLogWriter implementations, but they were never ideal. Starting with version 2. Make sure you read the documentation of the Strategy interface to understand the implications.
Each phase is represented by one or more interfaces that can be used for customization. Every phase has a sensible default. Logging HTTP messages and including their bodies is a rather expensive task, so it makes a lot of sense to disable logging for certain requests. A common use case would be to ignore health check requests from a load balancer, or any request to management endpoints typically issued by developers.
Defining a condition is as easy as writing a special Predicate that decides whether a request and its corresponding response should be logged or not. Alternatively you can use and combine predefined predicates:. Exclusion patterns, e. The goal of Filtering is to prevent the logging of certain sensitive parts of HTTP requests and responses.
This usually includes the Authorization header, but could also apply to certain plaintext query or form parameters — e. For more complicated setups one should fallback to the low-level variants, i. Logbook uses a correlation id to correlate requests and responses. This allows match-related requests and responses that would usually be located in different places in the log file. If the default implementation of the correlation id is insufficient for your use case, you may provide a custom implementation:.
Formatting defines how requests and responses will be transformed to strings basically. Formatters do not specify where requests and responses are logged to — writers do that work. It is primarily designed to be used for local development and debugging, not for production use.
How to add a filter in Spring Boot
Unlike HTTP, it is primarily designed for production use — parsers and log consumers can easily consume it.Often we are faced with capturing http requests and responses for logging or other purposes. The main issue with reading request is that as soon as the input stream is consumed its gone whoof… and cannot be read again. So the input stream has to be cached. Instead of writing your own classes for caching which can be found at several places on webSpring provides a couple of useful classes i.
These classes can be utilized very effectively, for example, in filters for logging purposes. Since the filter is declared as DelegatingFilterProxy, it can be declared as a bean using Component or Bean annotations. The input stream will be cached in the wrapped request as soon as the input stream is consumed after chain. Then it can be accessed as below:. However, things are a bit different for response. Since the response was also wrapped before passing it to the filter chain, it will also be cached to the output stream as soon as it is written on its way back.
But since the output stream will also be consumed so you have to copy the response back to the output stream using wrapper.
See below:. Logging http request and response with Spring 4 Often we are faced with capturing http requests and responses for logging or other purposes. Define a filter in web.