apipkgen
Generate a HTTP API wrapper package from a yaml template for the API
The internals are a little hacky, but the point is to have as few dependencies as possible, just depending on yaml right now.
Steps
- Specify API in a YAML file
- Run
apipkgen::generate_pkg()to generate a package - Write wrapper functions in the new package
- Done!
Features
- Package generation from a yaml template
- gives back raw text right now, will add toggles to add JSON vs. XML parsers
- specify query parameters, including options, whether required or not, and expected class
- same as previous, but for paths on the base URL
Example spec
- nytimes https://github.com/NYTimes/public_api_specs (requires auth)
- stripe https://github.com/stripe/openapi (requires auth)
- Canada's BC government https://github.com/bcgov/api-specs (auth not required)
Package Status and Installation
remotes::install_github("sckott/apipkgen")library("apipkgen")Simple yml template (not fitting swagger/etc.)
generate a package
use the function generate_pkg()
template <- system.file('examples', 'template_crossref.yml',
package = "apipkgen")
path <- file.path(tempdir(), "crpkg")
generate_pkg(path, template_path = template)your package needs functions
The package created doesn't have any exported functions, just internal functions for your to build user facing functions.
Let's write a user facing functions. The Crossref API template above specified for the works route that parameters are query and rows. So let's work with those.
crossref_works <- function(query = NULL, rows = NULL, ...) {
crpkg::works(query = query, rows = rows, ...)
}In addition, it's a good idea to always allow users to pass in curl options. Beginners can ignore it, but power curl users will want/have to play with curl options. The function builder builds in ... as a parameter so in the user facing function above all you have to do is add that as well for users to access.
Install package
Go to the new directory, and in R/RStudio run devtools::document() and devtools::install() (or equivalent).
Use package
Call the function. The package builder gives back plain text, so you have to parse it yourself.
res <- crossref_works(query = "science")
jsonlite::fromJSON(res)
#> $status
#> [1] "ok"
#>
#> $`message-type`
#> [1] "work-list"
#>
#> $`message-version`
#> [1] "1.0.0"
#>
#> $message
#> $message$query
#> $message$query$`search-terms`
#> [1] "science"
#>
#> $message$query$`start-index`
#> [1] 0
#>
#>
#> $message$`items-per-page`
#> [1] 20
#>
#> $message$items
#> indexed.date-parts indexed.date-time indexed.timestamp reference-count
#> 1 2015, 12, 27 2015-12-27T23:37:50Z 1.451259e+12 0
#> 2 2015, 12, 24 2015-12-24T22:03:23Z 1.450995e+12 0
#> 3 2015, 12, 25 2015-12-25T19:17:30Z 1.451071e+12 0
#> 4 2015, 12, 27 2015-12-27T19:35:51Z 1.451245e+12 0Swagger/OpenAPI
Example 1
Get a spec, in this case from the Province of British Columbia https://github.com/bcgov/api-specs
bc_spec <-
"https://raw.githubusercontent.com/bcgov/api-specs/master/bcgnws/bcgnws.json"
bc_spec_path <- "bcgov_bcgnws.yaml"
download.file(bc_spec, bc_spec_path)Generate the package, and install it
generate_pkg(
pkg_path = "bcgov/",
template_path = bc_spec_path
)
devtools::document("bcgov")
#> Writing NAMESPACE
#> Writing NAMESPACE
#> Writing bcgov-package.Rd
#> Writing names_search.Rd
#> Writing names_official_search.Rd
#> Writing names_notOfficial_search.Rd
#> Writing names_inside.Rd
#> Writing names_near.Rd
#> Writing names_decisions_recent.Rd
#> Writing names_decisions_year.Rd
#> Writing names_changes.Rd
#> Writing names_nameId.outputFormat.Rd
#> Writing features_featureId.Rd
#> Writing featureClasses.Rd
#> Writing featureCategories.Rd
#> Writing featureTypes.Rd
#> Writing nameAuthorities.Rd
devtools::install_local("bcgov", force = TRUE, quiet = TRUE)Restart R ...
Get man page for a function
?bcgov::nameAuthoritiesRun some functions
bcgov::nameAuthorities()
#> [1] "{\n \"nameAuthorities\": [\n {\n \"id\": \"1\",\n \"resourceUrl\": \"apps.gov.bc.ca/pub/bcgnws/nameAuthorities/1\",\n \"nameAuthority\": \"BC Geographical Names Office\",\n \"webSiteUrl\": \"http://www2.gov.bc.ca/gov/content/governments/celebrating-british-columbia/historic-places/geographical-names\"},\n {\n \"id\": \"41\",\n \"resourceUrl\": \"apps.gov.bc.ca/pub/bcgnws/nameAuthorities/41\",\n \"nameAuthority\": \"Vancouver, City of\",\n \"webSiteUrl\": \"http://vancouver.ca/\"},\n {\n \"id\": \"2\",\n \"resourceUrl\": \"apps.gov.bc.ca/pub/bcgnws/nameAuthorities/2\",\n \"nameAuthority\": \"BC Register of Historic Places\",\n \"webSiteUrl\": \"http://www2.gov.bc.ca/gov/content/governments/celebrating-british-columbia/historic-places/provincial-federal-registers\"}],\n \"legal\": {\n \"disclaimerURI\": \"http://www.gov.bc.ca/com/disclaimer.html\",\n \"privacyURI\": \"http://www.gov.bc.ca/com/privacy.html\",\n \"copyrightNotice\": \"Copyright (c) 2019, Province of British Columbia\",\n \"copyrightLicenseURI\": \"http://www.gov.bc.ca/com/copyright.html\"}}"res <- bcgov::names_search(name = "Victoria")
tibble::as_tibble(jsonlite::fromJSON(res)$features)
#> # A tibble: 10 x 3
#> type properties$uri $name $language $status $isOfficial
#> <chr> <chr> <chr> <chr> <chr> <int>
#> 1 Feat… apps.gov.bc.c… Vict… English adopted 1
#> 2 Feat… apps.gov.bc.c… Vict… English adopted 1
#> 3 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 4 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 5 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 6 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 7 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 8 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 9 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> 10 Feat… apps.gov.bc.c… Vict… not defi… adopted 1
#> # … with 24 more variables: $nameAuthority$resourceUrl <chr>, $$id <chr>,
#> # $$nameAuthority <chr>, $$webSiteUrl <chr>, $tags <list>, $score <dbl>,
#> # $feature$id <chr>, $$uuid <chr>, $$uri <chr>, $$mapsheets <chr>,
#> # $$names <chr>, $changeDate <chr>, $decisionDate <chr>,
#> # $featureCategory <int>, $featureCategoryDescription <chr>,
#> # $featureCategoryURI <chr>, $featureType <chr>, $lonAsRecorded <int>,
#> # $latAsRecorded <int>, $datumAsRecorded <chr>, $position <chr>,
#> # $ntsMap <chr>, geometry$type <chr>, $coordinates <list>cleanup
unlink("bcgov", TRUE, TRUE)
unlink(bc_spec_path, TRUE)
remove.packages("bcgov")Example 2
An example with the Directory of Open Access Journals
doaj_spec <- "https://doaj.org/api/v1/swagger.json"
doaj_spec_path <- "doaj.json"
download.file(doaj_spec, doaj_spec_path)Generate the package, and install it
generate_pkg(
pkg_path = "doaj/",
template_path = doaj_spec_path,
base_url = "https://doaj.org"
)
devtools::document("doaj")
#> Writing NAMESPACE
#> Writing NAMESPACE
#> Writing doaj-package.Rd
#> Writing api_v1_applications_application_id.Rd
#> Writing api_v1_articles_article_id.Rd
#> Writing api_v1_journals_journal_id.Rd
#> Writing api_v1_search_applications_search_query.Rd
#> Writing api_v1_search_articles_search_query.Rd
#> Writing api_v1_search_journals_search_query.Rd
devtools::install_local("doaj", force = TRUE, quiet = TRUE)Run a function
doaj::api_v1_search_journals_search_query("cellular")
#> [1] "{\"last\": \"https://doaj.org/api/v1/search/journals/cellular?page=4&pageSize=10\", \"pageSize\": 10, \"timestamp\": \"2019-0306T17:59:07Z\", \"results\": [{\"admin\": {\"ticked\": true, \"seal\": true}, \"last_updated\": \"2018-05-10T09:57:58Z\", \"id\": \"0a1162bd5eb04ffb98e6f5209659f65a\", \"bibjson\": {\"allows_fulltext_indexing\": true, \"archiving_policy\": {\"url\": \"http://www.pagepress.org/publishing-services/digital-preservation.html\", \"known\": [\"Portico\"]}, \"persistent_identifier_scheme\": [\"DOI\"], \"keywords\": [\"MAP kinases\", \"biological functions\", \"cellular processes\"], \"deposit_policy\": [\"Sherpa/Romeo\"], \"article_statistics\": {\"url\": \"http://www.pagepressjournals.org/index.php/mk/pages/view/stats\", \"statistics\": true}, \"title\": \"MAP Kinase\", \"publication_time\": 10, \"provider\": \"OJS\", \"subject\": [{\"code\": \"QH301-705.5\", \"term\": \"Biology (General)\", \"scheme\": \"LCC\"}], \"format\": [\"PDF\", \"XML\"], \"plagiarism_detection\": {\"detection\": true, \"url\": \"http://www.pagepressjournals.org/index.php/mk/pages/view/plagiarism\"}, \"apc_url\": \"http://www.pagepressjournals.org/index.php/mk/pages/view/payments\", \"link\": [{\"url\": \"http://www.mapkinase.org\", \"type\": \"homepage\"}, {\"url\": \"http://www.pagepress.org/publications/authors_fee.html\", \"type\": \"waiver_policy\"}, {\"url\": \"http://www.pagepressjournals.org/index.php/mk/pages/view/eb\", \"type\": \"editorial_board\"}, {\"url\": \"http://www.pagepressjournals.org/index.php/mk/about/editorialPolicies#focusAndScope\", \"type\": \"aims_scope\"}, {\"url\": \"http://www.pagepressjournals.org/index.php/mk/about/submissions#authorGuidelines\", \"type\": \"author_instructions\"}, {\"url\": \"http://www.pagepress.org/open-access.html\", \"type\": \"oa_statement\"}], \"active\": true, \"oa_start\": {\"year\": 2012}, \"editorial_review\": {\"process\": \"Blind peer review\", \"url\": \"http://www.pagepressjournals.org/index.php/mk/about/editorialPolicies#peerReviewProcess\"}, \"author_copyright\": {\"url\": \"http://www.pagepressjournals.org/index.php/mk/about/submissions#copyrightNotice\", \"copyright\": \"True\"}, \"publisher\": \"PAGEPress Publications\", \"language\": [\"EN\"], \"license\": [{\"open_access\": true, \"embedded\": true, \"title\": \"CC BY-NC\", \"url\": \"http://www.pagepressjournals.org/index.php/mk/about/submissions#copyrightNotice\", \"NC\": true, \"ND\": false, \"embedded_example_url\": \"http://www.pagepressjournals.org/index.php/mk/article/view/5700\", \"SA\": false, \"type\": \"CC BY-NC\", \"BY\": true}], \"alternative_title\": \"MK\", \"country\": \"IT\", \"submission_charges_url\": \"http://www.pagepressjournals.org/index.php/mk/pages/view/payments\", \"author_publishing_rights\": {\"url\": \"http://www.pagepressjournals.org/index.php/mk/about/submissions#copyrightNotice\", \"publishing_rights\": \"True\"}, \"identifier\": [{\"type\": \"eissn\", \"id\": \"2235-4956\"}]}, \"created_date\": \"2016-02-02T10:13:15Z\"}, {\"admin\": {\"ticked\": true, \"seal\": true}, \"last_updated\": \"2018-06-25T10:06:29Z\", \"id\": \"0bc2ff6a53704d259752f6ff11aac7d1\", \"bibjson\": {\"allows_fulltext_indexing\": true, \"archiving_policy\": {\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/about\", \"known\": [\"PMC/Europe PMC/PMC Canada\"]}, \"persistent_identifier_scheme\": [\"DOI\"], \"keywords\": [\"microbiology\", \"microbes\", \"immune responses\", \"cell biology\"], \"apc\": {\"currency\": \"USD\", \"average_price\": 2950}, \"subject\": [{\"code\": \"QR1-502\", \"term\": \"Microbiology\", \"scheme\": \"LCC\"}], \"article_statistics\": {\"url\": \"http://journal.frontiersin.org/Journal/10.3389/fcimb.2014.00127/impact#impact\", \"statistics\": true}, \"title\": \"Frontiers in Cellular and Infection Microbiology\", \"publication_time\": 14, \"format\": [\"PDF\", \"HTML\", \"XML\"], \"plagiarism_detection\": {\"detection\": true, \"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/reviewguidelines\"}, \"apc_url\": \"http://home.frontiersin.org/about/publishing-fees\", \"link\": [{\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology\", \"type\": \"homepage\"}, {\"url\": \"http://home.frontiersin.org/about/publishing-fees\", \"type\": \"waiver_policy\"}, {\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/editorialboard\", \"type\": \"editorial_board\"}, {\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/about\", \"type\": \"aims_scope\"}, {\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/authorguidelines\", \"type\": \"author_instructions\"}, {\"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/about\", \"type\": \"oa_statement\"}], \"oa_start\": {\"year\": 2011}, \"editorial_review\": {\"process\": \"Blind peer review\", \"url\": \"http://www.frontiersin.org/Cellular_and_Infection_Microbiology/reviewguidelines\"}, \"author_copyright\": {\"url\": \"http://journal.frontiersin.org/journal/cellular-and-infection-microbiology#about\", \"copyright\": \"True\"}, \"publisher\": \"Frontiers Media S.A.\", \"language\": [\"EN\"], \"license\": [{\"open_access\": true, \"embedded\": false, \"title\": \"CC BY\", \"url\": \"http://journal.frontiersin.org/journal/cellular-and-infection-microbiology#about\", \"NC\": false, \"ND\": false, \"embedded_example_url\": \"\", \"SA\": false, \"type\": \"CC BY\", \"BY\": true}], \"country\": \"CH\", \"submission_charges_url\": \"http://home.frontiersin.org/about/publishing-fees\", \"author_publishing_rights\": {\"url\": \"http://journal.frontiersin.org/journal/cellular-and-infection-microbiology#about\", \"publishing_rights\": \"True\"}, \"identifier\": [{\"type\": \"eissn\", \"id\": \"2235-2988\"}]}, \"created_date\": \"2016-01-21T19:36:21Z\"}, {\"admin\": {\"ticked\": true, \"seal\": 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\"url\": \"https://www.hindawi.com/journals/misy/guidelines/\", \"NC\": false, \"ND\": false, \"embedded_example_url\": \"https://www.hindawi.com/journals/misy/2015/372315/\", \"SA\": false, \"type\": \"CC BY\", \"BY\": true}], \"country\": \"GB\", \"submission_charges_url\": \"https://www.hindawi.com/journals/misy/apc/\", \"author_publishing_rights\": {\"url\": \"https://www.hindawi.com/journals/misy/guidelines/\", \"publishing_rights\": \"True\"}, \"identifier\": [{\"type\": \"pissn\", \"id\": \"1574-017X\"}, {\"type\": \"eissn\", \"id\": \"1875-905X\"}]}, \"created_date\": \"2015-03-25T19:20:17Z\"}, {\"admin\": {\"ticked\": true, \"seal\": false}, \"last_updated\": \"2018-05-10T09:59:07Z\", \"id\": \"180d5313996244e6a34e962887bceca3\", \"bibjson\": {\"allows_fulltext_indexing\": true, \"archiving_policy\": {\"url\": \"http://www.smartscitech.com/index.php/MCE/about/editorialPolicies#archiving\", \"known\": [\"LOCKSS\", \"PMC/Europe PMC/PMC Canada\"]}, 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Tumors. Oncology. 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unlink("doaj", TRUE, TRUE)
unlink(doaj_spec_path, TRUE)
remove.packages("doaj")Citation
Get citation information for apipkgen in R by running: citation(package = 'apipkgen')
Code of Conduct
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.