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#' | ||
#' @references <https://developer.twitter.com/en/docs/twitter-api/annotations/overview> |
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# Creating requests #### | ||
auth_is_bearer <- function(token = NULL) { | ||
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if (is.null(token)) { | ||
token <- auth_get() | ||
} | ||
inherits(token, "rtweet_bearer") | ||
} | ||
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# Check token readiness for API v2 | ||
# | ||
# Check if current authentication is ready for API v2 usage. | ||
# @param token The token to check if can be used for API v2. | ||
# @param mechanism Which flavor of authentication must be used. | ||
# | ||
# The authentication method required for each endpoint might change, this is a | ||
# helper for examples. | ||
# | ||
# @return If no issue is found the original token, if something is amiss it raises an error. | ||
# @export | ||
# | ||
# @examples | ||
# if (auth_has_default()) { | ||
# tryCatch(check_token_v2()) | ||
# } | ||
check_token_v2 <- function(token = NULL, mechanism = "bearer") { | ||
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token <- token %||% auth_get() | ||
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if (mechanism == "bearer" && !auth_is_bearer(token)) { | ||
abort("A bearer `token` is needed for this endpoint.") | ||
} | ||
token | ||
} | ||
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# General function to create the requests for Twitter API v2 with retry limits | ||
# and error handling | ||
req_v2 <- function(token = NULL) { | ||
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token <- check_token_v2(token) | ||
req <- httr2::request("https://api.twitter.com/2") | ||
req_headers <- httr2::req_headers(req, | ||
`Content-type` = "application/json", | ||
Authorization = paste0("Bearer ", token$token) | ||
) | ||
req_try <- httr2::req_retry(req_headers, | ||
is_transient = twitter_is_transient, | ||
after = twitter_after) | ||
req_try | ||
} | ||
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twitter_is_transient <- function(resp) { | ||
httr2::resp_status(resp) %in% c(403, 503) && | ||
identical(httr2::resp_header(resp, "x-rate-limit-remaining"), "0") | ||
} | ||
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twitter_after <- function(resp) { | ||
when <- as.numeric(httr2::resp_header(resp, "x-rate-limit-reset")) | ||
when - unclass(Sys.time()) | ||
} | ||
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endpoint_v2 <- function(token, path, throttle) { | ||
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req <- httr2::req_url_path_append(req_v2(token), path) | ||
httr2::req_throttle(req, throttle, realm = path) | ||
} | ||
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prepare_params <- function(x) { | ||
lapply(x, paste, collapse = ",") | ||
} | ||
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# Handling responses #### | ||
parsing <- function(x) { | ||
if (!is.logical(x) || any(is.na(x))) { | ||
stop("parse should be either TRUE or FALSE", call. = FALSE) | ||
} | ||
if (length(x) > 1) { | ||
stop("parse should be of length 1", call. = FALSE) | ||
} | ||
if (isTRUE(x)) { | ||
stop("Parsing for the rtweet API v2 is not yet implemented", call. = FALSE) | ||
} | ||
} | ||
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l_minus <- function(l, minus) { | ||
keep <- setdiff(names(l), minus) | ||
l[keep] | ||
} | ||
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# Handle the response and give attributes | ||
resp <- function(obj, type = "json", ...) { | ||
out <- switch(type, | ||
"json" = httr2::resp_body_json(obj, ...), | ||
"html" = httr2::resp_body_html(obj, ...), | ||
"xml" = httr2::resp_body_xml(obj, ...)) | ||
class(out) <- c("Twitter_resp", class(out)) | ||
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if (has_name_(out, "meta")) { | ||
meta <- data.frame(sent = strptime(out$meta$sent, tz = "UTC", | ||
format = "%Y-%m-%dT%H:%M:%OS")) | ||
if (has_name_(out$meta, "summary")) { | ||
meta <- cbind(meta, list2DF(out$meta$summary)) | ||
} | ||
rest <- list2DF(l_minus(out$meta, c("summary", "sent"))) | ||
if (ncol(rest) >= 1 && nrow(rest) == 1) { | ||
meta <- cbind(meta, rest) | ||
} else if (nrow(rest) > 1) { | ||
stop("Please check") | ||
} | ||
out$meta <- meta | ||
} | ||
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if (has_name_(out, "errors")) { | ||
out$errors <- do.call(rbind, lapply(out$errors, list2DF)) | ||
} | ||
out | ||
} | ||
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