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R client for various CrossRef APIs
https://docs.ropensci.org/rcrossref
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preventing NULL output (w/ (504) warning) #193

Closed lukasjonkers closed 4 years ago

lukasjonkers commented 4 years ago
Session Info ```r ─ 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) memoise 1.1.0 2017-04-21 [1] CRAN (R 3.6.0) mime 0.7 2019-06-11 [1] CRAN (R 3.6.0) miniUI 0.1.1.1 2018-05-18 [1] CRAN (R 3.6.0) modelr 0.1.5 2019-08-08 [1] CRAN (R 3.6.0) munsell 0.5.0 2018-06-12 [1] CRAN (R 3.6.0) nlme 3.1-141 2019-08-01 [1] CRAN (R 3.6.0) pillar 1.4.2 2019-06-29 [1] CRAN (R 3.6.0) 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) purrr * 0.3.2 2019-03-15 [1] CRAN (R 3.6.0) R6 2.4.0 2019-02-14 [1] CRAN (R 3.6.0) 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/library ```

cr_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 4 years ago

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?