Salvatore Mongiardo created CAMEL-26639:
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Summary: camel-file silently fails to poll files on Windows when
URI uses absolute path with backslashes
Key: CAMEL-26639
URL: https://issues.apache.org/jira/browse/CAMEL-26639
Project: Camel
Issue Type: Bug
Components: camel-file
Reporter: Salvatore Mongiardo
h2. Summary
On Windows, when a Camel file: URI contains an absolute path with backslashes
(e.g. {{file:C:\\Users\\...\\target}}), the file consumer starts successfully
but never polls any files. No exceptions are logged, no files are processed -
completely silent failure.
h2. Root Cause
When {{Paths.get("target").toAbsolutePath().toString()}} is used on Windows, it
returns a path with backslashes (e.g. {{C:\\Users\\...\\target}}). When this is
interpolated into a Camel {{file:}} URI:
# {{UnsafeUriCharactersEncoder.encode()}} encodes backslash as %5C
# {{URI.getSchemeSpecificPart()}} decodes it back
# The route internal URI representation retains the encoded form
# The file consumer display name shows {{file://C:%5CUsers%5C...}}
# The file poller silently fails to detect files in the directory
On Linux/macOS this never happens because toAbsolutePath() always uses forward
slashes.
h2. Steps to Reproduce
{code:java}
String directory = Paths.get("target").toAbsolutePath().toString();
// On Windows: C:\Users\test\target
fromF("file:%s?fileName=%s", directory, "test.txt")
.to("log:result");
{code}
The route starts and logs:
{code}
Started route1 (file://C:%5CUsers%5Ctest%5Ctarget)
{code}
But no files are ever polled.
h2. Expected Behavior
The file consumer should normalize backslashes to forward slashes and poll the
directory correctly.
h2. Proposed Fix
Normalize backslashes to forward slashes in
{{FileComponent.buildFileEndpoint()}} before creating the File object:
{code:java}
remaining = remaining.replace('\\', '/');
{code}
This is safe because Java File class handles forward slashes on all platforms.
h2. Environment
* Windows Server 2019/2025
* JDK 21
* Camel 4.22.x (also affects main)
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