.probeRange

Internal helper for the parallel ranged download path. Sends a HEAD request
and reads <code>Content-Length</code> and <code>Accept-Ranges</code>. Any failure (HEAD not
supported, timeout, httr2 unavailable) returns <code>size = NA</code> /
<code>acceptRanges = FALSE</code>, which the caller treats as "use single-stream".

internal

A collection of high-level, machine- and OS-independent tools
for making reproducible and reusable content in R.
The two workhorse functions are 'Cache()' and 'prepInputs()'.
'Cache()' allows for nested caching, is robust to environments and objects
with environments (like functions), and deals with some classes of
file-backed R objects e.g., from 'terra' and 'raster' packages.
Both functions have been developed to be foundational components of data
retrieval and processing in continuous workflow situations. In both functions,
efforts are made to make the first and subsequent calls of functions have
the same result, but faster at subsequent times by way of checksums
and digesting. Several features are still under development, including
cloud storage of cached objects allowing for sharing between users. Several
advanced options are available, see '?reproducibleOptions()'.

Eliot J B

reproducible

Enhance Reproducibility of R Code

Eliot J B McIntire

Alex M Chubaty

Tati Micheletti

Ceres Barros

Ian Eddy

His Majesty the King in Right of Canada, as represented by the Minister of Natural Resources Canada 

.probeRange function

<dl><dt>url</dt>
<dd>The URL to probe.</dd>
<dt>verbose</dt>
<dd>Numeric verbosity level.</dd></dl>

Arguments

Probe a URL for size and HTTP Range support — .probeRange

<dl>

<dt>url</dt>
<dd>The URL to probe.</dd>


<dt>verbose</dt>
<dd>Numeric verbosity level.</dd>

</dl>

.probeRange: Probe a URL for size and HTTP Range support

Description

Usage

Value

Arguments