Support read_csv(https) for Compressed Files

[stanbrub]

Reading a csv as a compressed file works when reading from the file system, but reading the same file through http(s) does not work. This is currently not supported.

Example reading from a file that works

from deephaven import read_csv
tbl = read_csv('/data/benchmark-results.csv.gz')

Example reading from a remote file that does not work:

from deephaven import read_csv
tbl = read_csv('https://storage.googleapis.com/deephaven-benchmark/nightly/run-183911a69e/benchmark-results.csv.gz')

The error message says:

Value: read csv failed : io.deephaven.csv.util.CsvReaderException: Row 2 has too few columns (expected 3)

So there are two problems here:

• The error message does not indicate what is wrong
• Support for a gzipped csv works for local files but not remote files

Given the complexity of how HTTP URLs can be specified, recommend support for some common forms found in cloud services like GCloud bucket as shown above and proper error messages for the rest.