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Gracefully handle problems without throwing errors and wanrings when …
…handling internet resources
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Vries
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Jan 23, 2023
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Original file line number | Diff line number | Diff line change |
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@@ -1,8 +1,8 @@ | ||
Package: CopernicusMarine | ||
Type: Package | ||
Title: Search Download and Handle Data from Copernicus Marine Service Information | ||
Version: 0.0.5 | ||
Date: 2023-01-19 | ||
Version: 0.0.6 | ||
Date: 2023-01-23 | ||
Authors@R: c(person("Pepijn", "de Vries", role = c("aut", "cre", "dtc"), | ||
email = "[email protected]", | ||
comment = c(ORCID = "0000-0002-7961-6646"))) | ||
|
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,36 @@ | ||
.http_status_ok <- function(x) { | ||
if (dplyr::between(x$status_code, 100, 199)) { | ||
message(sprintf("Unexpected informational response from Copernicus (status %i).", x$status_code)) | ||
return(FALSE) | ||
} | ||
if (dplyr::between(x$status_code, 300, 399)) { | ||
message(sprintf("Unexpected redirection from Copernicus (status %i).", x$status_code)) | ||
return(FALSE) | ||
} | ||
if (dplyr::between(x$status_code, 400, 499)) { | ||
message(sprintf(paste("Copernicus reported a client error (status %i).", | ||
"You may have requested information that is not available,", | ||
"please check your input.", | ||
sep = "\n"), x$status_code)) | ||
return(FALSE) | ||
} | ||
if (dplyr::between(x$status_code, 500, 599)) { | ||
message(sprintf("Copernicus reported a server error (status %i).\nPlease try again later.", x$status_code)) | ||
return(FALSE) | ||
} | ||
if (x$status_code < 100 || x$status_code >= 600) { | ||
message(sprintf("Copernicus responded with unknown status (status %i).", x$status_code)) | ||
return(FALSE) | ||
} | ||
return(TRUE) | ||
} | ||
|
||
.try_online <- function(expr, resource) { | ||
result <- tryCatch(expr, error = function(e) { | ||
message(sprintf("Failed to collect information from %s.\n%s", resource, e$message)) | ||
return(NULL) | ||
}) | ||
if (is.null(result)) return(NULL) | ||
if (!.http_status_ok(result)) return(NULL) | ||
return(result) | ||
} |
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