paleolimbot opened a new pull request #12623:
URL: https://github.com/apache/arrow/pull/12623
This PR exposes `RandomAccessFile::GetFileInfo()`, which is particularly
useful for S3 files which carry some extra information that is useful to know
without reading the whole file.
``` r
# remotes::install_github("paleolimbot/arrow/r@r-file-metadata")
library(arrow, warn.conflicts = FALSE)
bucket <- s3_bucket("ursa-labs-taxi-data")
file <- bucket$OpenInputFile("2019/06/data.parquet")
file$ReadMetadata()
#> $`Content-Length`
#> [1] "120790979"
#>
#> $`Content-Type`
#> [1] "application/x-www-form-urlencoded; charset=utf-8"
#>
#> $ETag
#> [1] "\"f1efd5d76cb82861e1542117bfa52b90-8\""
#>
#> $`Last-Modified`
#> [1] "2020-01-17T16:26:28Z"
```
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