HTTP Error Helpers.

fauxpas

fauxpas does http errors

• HTTP error classes more in line with Ruby/Python/Etc.
• An error class for each HTTP status in case a user wants to be specific to an HTTP status code, and general purpose handlers for any error
• Work with any of the major R http clients: crul, curl, httr, (maybe RCurl later)
• Provide flexiblity for what to do on an HTTP error, including custom functions and message templates

Info Links:

• HTTP on wikipedia: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol
• HTTP2 on wikipedia: https://en.wikipedia.org/wiki/HTTP/2
• HTTP/1.1: https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
• HTTP/2: https://datatracker.ietf.org/doc/html/rfc7540

Install

CRAN version

install.packages("fauxpas")

Dev version

remotes::install_github("sckott/fauxpas")

library("fauxpas")

use with crul

library("crul")
cli <- HttpClient$new("https://httpbin.org/status/414")
res <- cli$get()
http(res)
#> Error: Request-URI Too Long (HTTP 414).
http414(res)
#> Error: Request-URI Too Long (HTTP 414).

x <- HTTPRequestURITooLong$new()
x$do_verbose(res)
#> Error: Request-URI Too Long (HTTP 414).
#> - The server is refusing to service the request because the Request-URI is
#>    longer than the server is willing to interpret. This rare condition is only likely
#>    to occur when a client has improperly converted a POST request to a GET request
#>    with long query information, when the client has descended into a URI black hole
#>    of redirection (e.g., a redirected URI prefix that points to a suffix of itself),
#>    or when the server is under attack by a client attempting to exploit security
#>    holes present in some servers using fixed-length buffers for reading or
#>    manipulating the Request-URI.

use with curl

library("curl")
h <- curl::new_handle()
curl::handle_setopt(h)
resp <- curl::curl_fetch_memory("https://httpbin.org/status/404", h)
http(resp)
#> Error: Not Found (HTTP 404).
http404(resp)
#> Error: Not Found (HTTP 404).

x <- HTTPNotFound$new()
x$do_verbose(resp)
#> Error:  Not Found (HTTP 404).
#>  - The server has not found anything matching the Request-URI. No indication is
#> given of whether the condition is temporary or permanent. The 410 (Gone) status
#> code SHOULD be used if the server knows, through some internally configurable
#> mechanism, that an old resource is permanently unavailable and has no forwarding
#> address. #> This status code is commonly used when the server does not wish to
#> reveal exactly why the request has been refused, or when no other response is
#> applicable.

use with httr

library("httr")
res <- GET("https://httpbin.org/status/405")
http405(res)
#> Error: Method Not Allowed (HTTP 405).

x <- HTTPMethodNotAllowed$new()
x$do_verbose(res)
#> Error: Method Not Allowed (HTTP 405).
#>  - The method specified in the Request-Line is not allowed for the resource
#> identified by the Request-URI. The response MUST include an Allow header
#> containing a list of valid methods for the requested resource.

Meta

• Please report any issues or bugs
• License: MIT
• Get citation information for fauxpas in R doing citation(package = 'fauxpas')