MisterRaindrop commented on code in PR #703:
URL: https://github.com/apache/iceberg-cpp/pull/703#discussion_r3371439007
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src/iceberg/arrow/arrow_io.cc:
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@@ -473,9 +473,14 @@ class ArrowOutputFile : public OutputFile {
} // namespace
Result<std::string> ArrowFileSystemFileIO::ResolvePath(const std::string&
file_location) {
- if (file_location.find("://") != std::string::npos) {
- ICEBERG_ARROW_ASSIGN_OR_RETURN(auto path,
arrow_fs_->PathFromUri(file_location));
- return path;
+ if (auto pos = file_location.find("://"); pos != std::string::npos) {
+ auto path = arrow_fs_->PathFromUri(file_location);
+ if (path.ok()) {
+ return path.ValueOrDie();
+ }
+ // PathFromUri rejects S3-compatible schemes (s3a/s3n, gs://, oss://);
+ // fall back to the scheme-less bucket/key.
+ return file_location.substr(pos + 3);
Review Comment:
I think this fallback is too broad. As implemented, any URI scheme rejected
by PathFromUri will be stri
pped and interpreted as a path in the wrapped filesystem. For example,
with an S3FileSystem, a mismatch ed URI such as file://bucket/prefix would be
interpreted as bucket/prefix instead of failing fast.
Can we make the fallback explicit and narrow?
1. The scheme should be in an allowlist for the wrapped filesystem. For
S3FileSystem, I think we can
support well-known aliases such as s3a and s3n. Vendor schemes such as oss
or gs should probably be opt-
in or discussed separately, because they may also represent native OSS/GCS
locations.
2. The PathFromUri failure should match the expected scheme-mismatch /
unsupported-scheme case. Other
errors, such as malformed URI, authority handling errors, or local-path
errors, should still be returned
to the caller.
In other words, this should be guarded by both a scheme allowlist and the
expected error condition,
rather than falling back for every PathFromUri failure.
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