[Bioc-devel] httr::GET() problem downloading a ExperimentHub resource

[Robert Castelo]

hi,

we recently added a few new ExperimentHub resources, consisting of BAM 
files and their corresponding BAI files and hosted in my own server. 
while it seems that they are accessible, they cannot be downloaded 
through the ExperimentHub API. the minimum example reproducing the 
problem is this one (using Bioc devel):

library(ExperimentHub)
httr::GET("https://experimenthub.bioconductor.org/fetch/8129")
Error in curl::curl_fetch_memory(url, handle = handle) :
   Failed writing received data to disk/application

while there's apparently no problem to "manually" download the resource 
using 'download.file()' and loading it with 
'GenomicAlignments::readGAlignments()':

download.file("https://experimenthub.bioconductor.org/fetch/8129", 
"file.bam")
trying URL 'https://experimenthub.bioconductor.org/fetch/8129'
Content type 'application/octet-stream' length 13296358 bytes (12.7 MB)
==================================================
downloaded 12.7 MB

gal <- GenomicAlignments::readGAlignments("file.bam")
gal[1:3]
GAlignments object with 3 alignments and 0 metadata columns:
       seqnames strand       cigar    qwidth     start end     width
          <Rle>  <Rle> <character> <integer> <integer> <integer> <integer>
   [1]     chr1      +       49M1S        50     16208 16256        49
   [2]     chr1      +       3S47M        50     16976 17022        47
   [3]     chr1      -  10M177N40M        50     17046 17272       227
           njunc
       <integer>
   [1]         0
   [2]         0
   [3]         1
   -------
   seqinfo: 2580 sequences from an unspecified genome

any hint why 'httr::GET()' fails, while 'download.file()' doesn't?

thanks!!

robert.
ps: just to clarify, the 'httr::GET()' example is behind the following 
problem:

eh <- ExperimentHub()
z <- eh[["EH8079"]]
see ?gDNAinRNAseqData and browseVignettes('gDNAinRNAseqData') for 
documentation
downloading 2 resources
retrieving 2 resources
|======================================================================| 
100%

Error: failed to load resource
   name: EH8079
   title: RNA-seq data BAM file subset of HRR589632 contaminated with 0% 
gDNA
   reason: 1 resources failed to download
In addition: Warning messages:
1: download failed
   web resource path: 
‘https://experimenthub.bioconductor.org/fetch/8129’ 
<https://secure-web.cisco.com/1G9U1udOgqvil7BzSrk1HB2QvPNNeRPXidZLvh_epNXLPv1TrhUqn08C9P35HGdtTOb7o618WNCTyiVyN33-XUDlHCBdrEge6kXsqOKgSLtQvTHIAy-lStrk-VCkYpHvBPBmBnsfje9oWlLBS3j_GHaZhn97VjWPhVuy-Dmaf2COELmWHmMNGFKsbPFgrf9c1uASwhF8epk0meG_S_IDryWy2EhVlyNGlVjBrkp6aeXox1IKgdVUV4h_1Q3moBEJ7FXMDzCUtfHd7zJDkhSL7Bf81pLeAlTWkC0lVAVXTKS6egI4Q-0-6mFXz7ui7zJM6/https%3A%2F%2Fexperimenthub.bioconductor.org%2Ffetch%2F8129%E2%80%99>
   local file path: ‘/home/rcastelo/.cache/R/ExperimentHub/12ba1aa03_8129’
   reason: Failed writing received data to disk/application
2: bfcadd() failed; resource removed
   rid: BFC3
   fpath: ‘https://experimenthub.bioconductor.org/fetch/8129’ 
<https://secure-web.cisco.com/1G9U1udOgqvil7BzSrk1HB2QvPNNeRPXidZLvh_epNXLPv1TrhUqn08C9P35HGdtTOb7o618WNCTyiVyN33-XUDlHCBdrEge6kXsqOKgSLtQvTHIAy-lStrk-VCkYpHvBPBmBnsfje9oWlLBS3j_GHaZhn97VjWPhVuy-Dmaf2COELmWHmMNGFKsbPFgrf9c1uASwhF8epk0meG_S_IDryWy2EhVlyNGlVjBrkp6aeXox1IKgdVUV4h_1Q3moBEJ7FXMDzCUtfHd7zJDkhSL7Bf81pLeAlTWkC0lVAVXTKS6egI4Q-0-6mFXz7ui7zJM6/https%3A%2F%2Fexperimenthub.bioconductor.org%2Ffetch%2F8129%E2%80%99>
   reason: download failed
3: download failed
   hub path: ‘https://experimenthub.bioconductor.org/fetch/8129’ 
<https://secure-web.cisco.com/1G9U1udOgqvil7BzSrk1HB2QvPNNeRPXidZLvh_epNXLPv1TrhUqn08C9P35HGdtTOb7o618WNCTyiVyN33-XUDlHCBdrEge6kXsqOKgSLtQvTHIAy-lStrk-VCkYpHvBPBmBnsfje9oWlLBS3j_GHaZhn97VjWPhVuy-Dmaf2COELmWHmMNGFKsbPFgrf9c1uASwhF8epk0meG_S_IDryWy2EhVlyNGlVjBrkp6aeXox1IKgdVUV4h_1Q3moBEJ7FXMDzCUtfHd7zJDkhSL7Bf81pLeAlTWkC0lVAVXTKS6egI4Q-0-6mFXz7ui7zJM6/https%3A%2F%2Fexperimenthub.bioconductor.org%2Ffetch%2F8129%E2%80%99>
   cache resource: ‘EH8079 : 8129’
   reason: bfcadd() failed; see warnings()


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