46 lines
1.8 KiB
R
46 lines
1.8 KiB
R
#' Perform a GET request with retries
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#'
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#' This function attempts to perform a GET request to the specified URL with the provided headers
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#' and checks for a specific HTTP status code. It retries the request if the desired status code is not received,
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#' or if the request results in an error.
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#'
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#' @param url_with_params The full URL to which the GET request is made, including any necessary query parameters.
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#' @param headers A list of headers to include in the GET request.
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#' @param code The desired HTTP status code for a successful request.
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#'
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#' @return NULL if the request does not succeed within the retry limit or if the desired status code is not achieved.
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#' Otherwise, returns the response from the successful GET request.
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#' @examples
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#' \dontrun{
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#' url <- "http://example.com/api"
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#' headers <- list(Authorization = "Bearer TOKEN", Accept = "application/json")
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#' code <- 200 # Looking for a '200 OK' response
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#' response <- requests(url, headers, code)
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#' if (is.null(response)) {
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#' print("Request failed or did not return the expected status code.")
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#' } else {
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#' print("Request succeeded.")
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#' }
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#' }
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#' @export
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#' @import httr
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request_api <- function(url_with_params,headers,code,retry_limit=5,timesleep=20){
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retry_count <- 0
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success <- FALSE
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while(retry_count < retry_limit && !success) {
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response <- tryCatch(httr::GET(url_with_params, headers),error=function(e){print(e);NULL})
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print(response)
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if(!is.null(response) && (response$status_code %in% code)) {
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success <- TRUE
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} else {
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print(url_with_params)
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print(paste0("retry #",retry_count,"/",retry_limit))
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retry_count <- retry_count + 1
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Sys.sleep(timesleep*(1+retry_count/retry_limit))
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}
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}
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if(!success) return(NULL)
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else return(response)
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}
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