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Posted to dev@sling.apache.org by "Joerg Hoh (Jira)" <ji...@apache.org> on 2022/01/05 17:01:00 UTC

[jira] [Comment Edited] (SLING-11038) Change statuscode in SlingPostServlet for PersistenceException, take 2

    [ https://issues.apache.org/jira/browse/SLING-11038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469423#comment-17469423 ] 

Joerg Hoh edited comment on SLING-11038 at 1/5/22, 5:00 PM:
------------------------------------------------------------

The problem is that the {{doRun()}} is allowed to throw a PersistenceException as well. In the most [recent version|https://github.com/apache/sling-org-apache-sling-servlets-post/blob/8dba178207b05e757c804c377eac33eff7076f93/src/main/java/org/apache/sling/servlets/post/impl/operations/AbstractPostOperation.java#L103] (Sling Post Servlets 2.5.0) only for the post processor calls both the {{PreconditionViolatedPersistenceException}} and the {{TemporaryPersistenceException}} are handled separately, so these exceptions can be handled with a 409 statuscode.
This should include the {{doRun}} call as well.

{code}
            
            try {
                doRun(request, response, changes);
                // invoke processors
                if (processors != null) {
                    for (SlingPostProcessor processor : processors) {
                        processor.process(request, changes);
                    }
                }
            } catch (PreconditionViolatedPersistenceException|TemporaryPersistenceException e) {
                throw e;
            } catch (Exception e) {
                throw new PersistenceException("Exception during response processing",e);
            }
{code}

This requires that the doRun method not only throws the generic {{PersistenceException}}, but more specialized ones.


was (Author: joerghoh):
The problem is that the {{doRun()}} is allowed to throw a PersistenceException as well. In the most [recent version|https://github.com/apache/sling-org-apache-sling-servlets-post/blob/8dba178207b05e757c804c377eac33eff7076f93/src/main/java/org/apache/sling/servlets/post/impl/operations/AbstractPostOperation.java#L103] (Sling Post Servlets 2.5.0) only for the post processor calls both the {{PreconditionViolatedPersistenceException}} and the {{TemporaryPersistenceException}} are handled separately, so these exceptions can be handled with a 409 statuscode.
This should include the {{doRun}} call as well.

{code}
            
            try {
                doRun(request, response, changes);
                // invoke processors
                if (processors != null) {
                    for (SlingPostProcessor processor : processors) {
                        processor.process(request, changes);
                    }
                }
            } catch (PreconditionViolatedPersistenceException|TemporaryPersistenceException e) {
                throw e;
            } catch (Exception e) {
                throw new PersistenceException("Exception during response processing",e);
            }
{code}

> Change statuscode in SlingPostServlet for PersistenceException, take 2
> ----------------------------------------------------------------------
>
>                 Key: SLING-11038
>                 URL: https://issues.apache.org/jira/browse/SLING-11038
>             Project: Sling
>          Issue Type: Improvement
>          Components: Servlets
>    Affects Versions: Servlets Post 2.3.36
>            Reporter: Thomas Mueller
>            Assignee: Robert Munteanu
>            Priority: Major
>             Fix For: Servlets POST 2.4.2
>
>
> When the SlingPostServlet receives a PersistenceExceptions (e.g. when trying to POST to a read-only resource), Resource at '...' is not modifiable, then a 500 is returned
> This is similar to SLING-9896, but has a different code path.
> Example stacktrace:
> {noformat}
> 03.01.2022 10:45:54.476 *ERROR* [179.60.150.135 [1641206754473] POST /content/dpc/inpro-seal//it/search.html HTTP/1.1] org.apache.sling.servlets.post.impl.operations.ModifyOperation Exception during response processing.
> org.apache.sling.api.resource.PersistenceException: Resource at '/content/dpc/inpro-seal/it/search' is not modifiable.
> 	at org.apache.sling.servlets.post.impl.helper.SlingPropertyValueHandler.setProperty(SlingPropertyValueHandler.java:114) [org.apache.sling.servlets.post:2.4.2]
> 	at org.apache.sling.servlets.post.impl.operations.ModifyOperation.writeContent(ModifyOperation.java:372) [org.apache.sling.servlets.post:2.4.2]
> 	at org.apache.sling.servlets.post.impl.operations.ModifyOperation.doRun(ModifyOperation.java:93) [org.apache.sling.servlets.post:2.4.2]
> 	at org.apache.sling.servlets.post.impl.operations.AbstractPostOperation.run(AbstractPostOperation.java:105) [org.apache.sling.servlets.post:2.4.2]
> 	at org.apache.sling.servlets.post.impl.SlingPostServlet.doPost(SlingPostServlet.java:243) [org.apache.sling.servlets.post:2.4.2]
> 	at org.apache.sling.api.servlets.SlingAllMethodsServlet.mayService(SlingAllMethodsServlet.java:146) [org.apache.sling.api:2.22.0]
> 	at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:342) [org.apache.sling.api:2.22.0]
> 	at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:374) [org.apache.sling.api:2.22.0]
> 	at org.apache.sling.engine.impl.request.RequestData.service(RequestData.java:552) [org.apache.sling.engine:2.7.2]
> 	at org.apache.sling.engine.impl.filter.SlingComponentFilterChain.render(SlingComponentFilterChain.java:44) [org.apache.sling.engine:2.7.2]
> {noformat}
> The problem is in
> https://github.com/apache/sling-org-apache-sling-servlets-post/blob/org.apache.sling.servlets.post-2.4.2/src/main/java/org/apache/sling/servlets/post/impl/operations/AbstractPostOperation.java#L105
> {noformat}
> public void run(final SlingHttpServletRequest request,
>                     final PostResponse response,
>                     final SlingPostProcessor[] processors) throws PreconditionViolatedPersistenceException, TemporaryPersistenceException {
>         final VersioningConfiguration versionableConfiguration = getVersioningConfiguration(request);
>         try {
>             ...
>             doRun(request, response, changes); <<== here
>             ...
>         } catch (Exception e) {
>             log.error("Exception during response processing.", e);
>             response.setError(e);
>         } finally {
> ...
>         }
>     }
> {noformat}



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