PerformHttpRequest callback arg order: (errorCode, resultData, resultHeaders, errorData)

Context

PerformHttpRequest (server-side; backed by PERFORM_HTTP_REQUEST_INTERNAL 0x8E8CC653) delivers its response to a callback whose argument order is frequently gotten wrong.

The signature

PerformHttpRequest(url, function(errorCode, resultData, resultHeaders, errorData)
  if errorCode ~= 200 then return end        -- errorCode is the HTTP status (first arg)
  local body = json.decode(resultData)        -- you decode the body yourself
end, "GET", "", { ["Content-Type"] = "application/json" })

Traps

• Callback order is (errorCode, resultData, resultHeaders, errorData) — the status code comes first, not the body.
• The request args after the callback are method, data, headers (data must be a string; json.encode it yourself for POST).
• resultData is a raw string — decode it.

Verified

version-checker/server.lua:66-72.

Tags: cfx, http, performhttprequest, server, callback, json
Category: natives
Source: jo_libs-fleet
Created: 2026-05-31T09:44:04.316Z