FileService: Querying /file.png/anything where /file.png is a file throws #4654
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ScalaWilliam
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rossabaker
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Mar 28, 2021
| @@ -86,13 +85,14 @@ object FileService { | |||
| case _ => OptionT.none | |||
| } | |||
| resolvedPath | |||
| .semiflatMap(path => F.delay(path.toRealPath(LinkOption.NOFOLLOW_LINKS))) | |||
| .flatMapF(path => | |||
| F.delay(if (Files.exists(path)) Some(path.toRealPath(LinkOption.NOFOLLOW_LINKS)) | |||
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Can we add the same LinkOption to the exists call to make it consistent with the toRealPath?
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Done - thank you for pointing it out.
Exception is `java.nio.file.FileSystemException: Not a directory`. Found bot queries in Scala Algorithms logs that are leading to an HTTP 5xx error. To avoid this, we explicitly check if what we are querying is a file, before attempting to resolve the real path; the exception is currently raised in particular where `.toRealPath` is called. Alternative approach would be to capture the `FileSystemException` as well, but it could hide other errors like `AccessDeniedException`. Because we already do a check, the check for `NoSuchFileException` becomes redundant.
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I still think this is potentially an issue in the two related services, but this is good on its own. |
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Exception is
java.nio.file.FileSystemException: Not a directory.Found bot queries in Scala Algorithms logs that are leading to an HTTP 5xx error.
To avoid this, we explicitly check if what we are querying is a file, before attempting to resolve the real path; the exception is currently raised in particular where
.toRealPathis called.Alternative approach would be to capture the
FileSystemExceptionas well, but it could hide other errors likeAccessDeniedException. Because we already do a check, the check forNoSuchFileExceptionbecomes redundant.Before changing main code:
