preventing NULL output (w/ (504) warning)
lukasjonkers opened this issue · 1 comments
lukasjonkers commented
Session Info
─ Session info ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
setting value
version R version 3.6.1 (2019-07-05)
os macOS High Sierra 10.13.6
system x86_64, darwin15.6.0
ui RStudio
language (EN)
collate en_GB.UTF-8
ctype en_GB.UTF-8
tz Europe/Berlin
date 2019-10-15
─ Packages ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
package * version date lib source
assertthat 0.2.1 2019-03-21 [1] CRAN (R 3.6.0)
backports 1.1.5 2019-10-02 [1] CRAN (R 3.6.0)
bibtex 0.4.2 2017-06-30 [1] CRAN (R 3.6.0)
broom 0.5.2 2019-04-07 [1] CRAN (R 3.6.0)
callr 3.3.2 2019-09-22 [1] CRAN (R 3.6.0)
cellranger 1.1.0 2016-07-27 [1] CRAN (R 3.6.0)
cli 1.1.0 2019-03-19 [1] CRAN (R 3.6.0)
colorspace 1.4-1 2019-03-18 [1] CRAN (R 3.6.0)
crayon 1.3.4 2017-09-16 [1] CRAN (R 3.6.0)
crul 0.8.4 2019-08-02 [1] CRAN (R 3.6.0)
curl 4.2 2019-09-24 [1] CRAN (R 3.6.0)
desc 1.2.0 2018-05-01 [1] CRAN (R 3.6.0)
devtools 2.2.1 2019-09-24 [1] CRAN (R 3.6.0)
digest 0.6.21 2019-09-20 [1] CRAN (R 3.6.0)
dplyr * 0.8.3 2019-07-04 [1] CRAN (R 3.6.0)
DT 0.9 2019-09-17 [1] CRAN (R 3.6.0)
ellipsis 0.3.0 2019-09-20 [1] CRAN (R 3.6.0)
fastmap 1.0.1 2019-10-08 [1] CRAN (R 3.6.0)
forcats * 0.4.0 2019-02-17 [1] CRAN (R 3.6.0)
fs 1.3.1 2019-05-06 [1] CRAN (R 3.6.0)
generics 0.0.2 2018-11-29 [1] CRAN (R 3.6.0)
ggplot2 * 3.2.1 2019-08-10 [1] CRAN (R 3.6.0)
glue 1.3.1 2019-03-12 [1] CRAN (R 3.6.0)
gtable 0.3.0 2019-03-25 [1] CRAN (R 3.6.0)
haven 2.1.1 2019-07-04 [1] CRAN (R 3.6.0)
hms 0.5.1 2019-08-23 [1] CRAN (R 3.6.0)
htmltools 0.4.0 2019-10-04 [1] CRAN (R 3.6.0)
htmlwidgets 1.5.1 2019-10-08 [1] CRAN (R 3.6.0)
httpcode 0.2.0 2016-11-14 [1] CRAN (R 3.6.0)
httpuv 1.5.2 2019-09-11 [1] CRAN (R 3.6.0)
httr 1.4.1 2019-08-05 [1] CRAN (R 3.6.0)
jsonlite 1.6 2018-12-07 [1] CRAN (R 3.6.0)
later 1.0.0 2019-10-04 [1] CRAN (R 3.6.0)
lattice 0.20-38 2018-11-04 [1] CRAN (R 3.6.1)
lazyeval 0.2.2 2019-03-15 [1] CRAN (R 3.6.0)
lifecycle 0.1.0 2019-08-01 [1] CRAN (R 3.6.0)
lubridate 1.7.4 2018-04-11 [1] CRAN (R 3.6.0)
magrittr 1.5 2014-11-22 [1] CRAN (R 3.6.0)
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pkgbuild 1.0.6 2019-10-09 [1] CRAN (R 3.6.0)
pkgconfig 2.0.3 2019-09-22 [1] CRAN (R 3.6.0)
pkgload 1.0.2 2018-10-29 [1] CRAN (R 3.6.0)
plyr 1.8.4 2016-06-08 [1] CRAN (R 3.6.0)
prettyunits 1.0.2 2015-07-13 [1] CRAN (R 3.6.0)
processx 3.4.1 2019-07-18 [1] CRAN (R 3.6.0)
promises 1.1.0 2019-10-04 [1] CRAN (R 3.6.0)
ps 1.3.0 2018-12-21 [1] CRAN (R 3.6.0)
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Rcpp 1.0.2 2019-07-25 [1] CRAN (R 3.6.0)
rcrossref * 0.9.2 2019-05-04 [1] CRAN (R 3.6.0)
readr * 1.3.1 2018-12-21 [1] CRAN (R 3.6.0)
readxl 1.3.1 2019-03-13 [1] CRAN (R 3.6.0)
remotes 2.1.0 2019-06-24 [1] CRAN (R 3.6.0)
rlang 0.4.0 2019-06-25 [1] CRAN (R 3.6.0)
rprojroot 1.3-2 2018-01-03 [1] CRAN (R 3.6.0)
rstudioapi 0.10 2019-03-19 [1] CRAN (R 3.6.0)
rvest 0.3.4 2019-05-15 [1] CRAN (R 3.6.0)
scales 1.0.0 2018-08-09 [1] CRAN (R 3.6.0)
sessioninfo 1.1.1 2018-11-05 [1] CRAN (R 3.6.0)
shiny 1.4.0 2019-10-10 [1] CRAN (R 3.6.0)
stringi 1.4.3 2019-03-12 [1] CRAN (R 3.6.0)
stringr * 1.4.0 2019-02-10 [1] CRAN (R 3.6.0)
testthat 2.2.1 2019-07-25 [1] CRAN (R 3.6.0)
tibble * 2.1.3 2019-06-06 [1] CRAN (R 3.6.0)
tidyr * 1.0.0 2019-09-11 [1] CRAN (R 3.6.0)
tidyselect 0.2.5 2018-10-11 [1] CRAN (R 3.6.0)
tidyverse * 1.2.1 2017-11-14 [1] CRAN (R 3.6.0)
triebeard 0.3.0 2016-08-04 [1] CRAN (R 3.6.0)
urltools 1.7.3 2019-04-14 [1] CRAN (R 3.6.0)
usethis 1.5.1 2019-07-04 [1] CRAN (R 3.6.0)
vctrs 0.2.0 2019-07-05 [1] CRAN (R 3.6.0)
withr 2.1.2 2018-03-15 [1] CRAN (R 3.6.0)
xml2 1.2.2 2019-08-09 [1] CRAN (R 3.6.0)
xtable 1.8-4 2019-04-21 [1] CRAN (R 3.6.0)
zeallot 0.1.0 2018-01-28 [1] CRAN (R 3.6.0)
[1] /Library/Frameworks/R.framework/Versions/3.6/Resources/librarycr_cn sometimes returns NULL and gives a w/ (504) warning. Any suggestions how I can prevent this and get a citation?
dois <- cr_r(2)
dois
[1] "10.1111/an.2000.41.5.33" "10.1007/978-3-319-28932-8_38"
cr_cn(dois, 'text', 'apa')
[[1]]
NULL
[[2]]
[1] "Ergon, Å., Solem, S., Uhlen, A. K., & Bakken, A. K. (2016). Generative Development in Red Clover in Response to Temperature and Photoperiod. Breeding in a World of Scarcity, 243–247. doi:10.1007/978-3-319-28932-8_38"
Warning message:
10.1111/an.2000.41.5.33 w/ (504) -
sckott commented
thanks for your question @lukasjonkers
The 504 indicates a server error, an error from doi.org. It's likely that was just a temporary problem for doi.org since it works now. When that does happen, you can just try again. If you want this programatically, you could have a check for any NULL outputs and then retry those DOIs.
We could fail on a failure like that 504 so that it stops on the one that failed, but then any failure would stop the progress of the other DOIs.
Does that help?