core-error-predicates
Advanced tools
Error predicate functions for operational errors thrown by node core
#Installation
npm install core-error-predicates
#Introduction
Error predicate functions for operational errors thrown by node core.
Predicate functions take an error object as argument and return true if the error object matches. This useful for instance when using bluebird catch filters or in the future when the JavaScript catch clauses will be able to take filter/predicate function parameters.
Example using bluebird:
require("core-error-predicates").globalize();
fs.readFileAsync("test.txt", "utf8").then(function(contents) {
console.log("file contents:", contents);
})
.catch(FileNotFoundError, function(e) {
console.log("file test.txt does not exist");
})
.catch(FileAccessError, function(e) {
console.log("no permissions to access test.txt");
});
#API
The module exports various error predicates and the .globalize() method.
The .globalize() method makes all the predicate functions available in global scope for convenience. If the name is already taken for a predicate in global scope, it will not be overwritten.
##Error predicates
FileNotFoundErrorFileAccessErrorEOFErrorUnknownHostErrorSocketErrorProtocolErrorFileSystemErrorNetworkErrorSSLError#####FileNotFoundError
When the error's code matches one of:
ENOENT#####FileAccessError
When the error's code matches one of:
EACCESSEPERM#####EOFError
When the error's code matches one of:
EOF#####UnknownHostError
When the error's code matches one of:
EADDRINFO#####SocketError
When the error's code matches one of:
EISCONNENOTCONNENOTSOCKENOTSUPEPROTOTYPEEAIFAMNOSUPPORTEAISERVICE#####ProtocolError
When the error's code matches one of:
EPROTOEPROTONOSUPPORTEPROTOTYPE#####FileSystemError
When the error's code matches one of:
EBUSYENOENTEOFEACCESSEAGAINEBADFEMFILEENOTDIREISDIREEXISTENAMETOOLONGEPERMELOOPENOTEMPTYENOSPCEIOEROFSENODEVESPIPEECANCELEDENFILEEXDEV#####NetworkError
When the error's code matches one of:
EADDRINFOEADDRNOTAVAILEAFNOSUPPORTEALREADYECONNABORTEDECONNREFUSEDECONNRESETEDESTADDRREQEHOSTUNREACHEISCONNEMSGSIZEENETDOWNENETUNREACHENONETENOTCONNENOTSOCKENOTSUPEPIPEEPROTOEPROTONOSUPPORTEPROTOTYPEETIMEDOUTEAIFAMNOSUPPORTEAISERVICEEAISOCKTYPEESHUTDOWN#####SSLError
When the error's message begins with -SSL Error:`
FAQs
Error predicate functions for operational errors thrown by node core
The npm package core-error-predicates receives a total of 215 weekly downloads. As such, core-error-predicates popularity was classified as not popular.
We found that core-error-predicates demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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