This function is used by other functions to read and write values.
Usage
kernel_api(
redcap_uri,
post_body,
config_options,
encoding = "UTF-8",
content_type = "text/csv",
handle_httr = NULL,
encode_httr = "form"
)Arguments
- redcap_uri
The uri/url of the REDCap server typically formatted as "https://server.org/apps/redcap/api/". Required.
- post_body
List of contents expected by the REDCap API. Required.
- config_options
A list of options passed to
httr::POST(). See details athttr::httr_options(). Optional.- encoding
The encoding value passed to
httr::content(). Defaults to 'UTF-8'.- content_type
The MIME value passed to
httr::content(). Defaults to 'text/csv'.- handle_httr
The value passed to the
handleparameter ofhttr::POST(). This is useful for only unconventional authentication approaches. It should beNULLfor most institutions.- encode_httr
The value passed to the
encodeparameter ofhttr::POST(). Defaults to"form", which is appropriate for most actions. (Currently, the only exception is importing a file, which uses "multipart".)
Details
If the API call is unsuccessful, a value of
base::package_version("0.0.0") will be returned. This ensures that a
the function will always return an object of class base::package_version.
It guarantees the value can always be used in utils::compareVersion().
Examples
config_options <- NULL
uri <- "https://redcap-dev-2.ouhsc.edu/redcap/api/"
token <- "9A068C425B1341D69E83064A2D273A70"
post_body <- list(
token = token,
content = "project",
format = "csv"
)
# \dontrun{
kernel <- REDCapR:::kernel_api(uri, post_body, config_options)
# Consume the results in a few different ways.
kernel$result
#> Response [https://redcap-dev-2.ouhsc.edu/redcap/api/]
#> Date: 2025-01-11 19:16
#> Status: 200
#> Content-Type: text/csv; charset=utf-8
#> Size: 590 B
#> project_id,project_title,creation_time,production_time,in_production,project_...
#> 33,"REDCapR: simple","2024-10-10 20:21:18",,0,English,4,,,,,0,0,0,0,1,0,0,,,,...
read.csv(text = kernel$raw_text)
#> project_id project_title creation_time production_time in_production
#> 1 33 REDCapR: simple 2024-10-10 20:21:18 NA 0
#> project_language purpose purpose_other project_notes custom_record_label
#> 1 English 4 NA NA NA
#> secondary_unique_field is_longitudinal has_repeating_instruments_or_events
#> 1 NA 0 0
#> surveys_enabled scheduling_enabled record_autonumbering_enabled
#> 1 0 0 1
#> randomization_enabled ddp_enabled project_irb_number project_grant_number
#> 1 0 0 NA NA
#> project_pi_firstname project_pi_lastname display_today_now_button
#> 1 NA NA 1
#> missing_data_codes external_modules bypass_branching_erase_field_prompt
#> 1 NA redcap_entity 0
as.list(read.csv(text = kernel$raw_text))
#> $project_id
#> [1] 33
#>
#> $project_title
#> [1] "REDCapR: simple"
#>
#> $creation_time
#> [1] "2024-10-10 20:21:18"
#>
#> $production_time
#> [1] NA
#>
#> $in_production
#> [1] 0
#>
#> $project_language
#> [1] "English"
#>
#> $purpose
#> [1] 4
#>
#> $purpose_other
#> [1] NA
#>
#> $project_notes
#> [1] NA
#>
#> $custom_record_label
#> [1] NA
#>
#> $secondary_unique_field
#> [1] NA
#>
#> $is_longitudinal
#> [1] 0
#>
#> $has_repeating_instruments_or_events
#> [1] 0
#>
#> $surveys_enabled
#> [1] 0
#>
#> $scheduling_enabled
#> [1] 0
#>
#> $record_autonumbering_enabled
#> [1] 1
#>
#> $randomization_enabled
#> [1] 0
#>
#> $ddp_enabled
#> [1] 0
#>
#> $project_irb_number
#> [1] NA
#>
#> $project_grant_number
#> [1] NA
#>
#> $project_pi_firstname
#> [1] NA
#>
#> $project_pi_lastname
#> [1] NA
#>
#> $display_today_now_button
#> [1] 1
#>
#> $missing_data_codes
#> [1] NA
#>
#> $external_modules
#> [1] "redcap_entity"
#>
#> $bypass_branching_erase_field_prompt
#> [1] 0
#>
# }