Method: Gem::Net::HTTP#set_debug_output

Defined in:

lib/rubygems/vendor/net-http/lib/net/http.rb

#set_debug_output(output) ⇒ Object

WARNING This method opens a serious security hole. Never use this method in production code.

Sets the output stream for debugging:

http = Gem::Net::HTTP.new(hostname)
File.open('t.tmp', 'w') do |file|
  http.set_debug_output(file)
  http.start
  http.get('/nosuch/1')
  http.finish
end
puts File.read('t.tmp')

Output:

opening connection to jsonplaceholder.typicode.com:80...
opened
<- "GET /nosuch/1 HTTP/1.1\r\nAccept-Encoding: gzip;q=1.0,deflate;q=0.6,identity;q=0.3\r\nAccept: */*\r\nUser-Agent: Ruby\r\nHost: jsonplaceholder.typicode.com\r\n\r\n"
-> "HTTP/1.1 404 Not Found\r\n"
-> "Date: Mon, 12 Dec 2022 21:14:11 GMT\r\n"
-> "Content-Type: application/json; charset=utf-8\r\n"
-> "Content-Length: 2\r\n"
-> "Connection: keep-alive\r\n"
-> "X-Powered-By: Express\r\n"
-> "X-Ratelimit-Limit: 1000\r\n"
-> "X-Ratelimit-Remaining: 999\r\n"
-> "X-Ratelimit-Reset: 1670879660\r\n"
-> "Vary: Origin, Accept-Encoding\r\n"
-> "Access-Control-Allow-Credentials: true\r\n"
-> "Cache-Control: max-age=43200\r\n"
-> "Pragma: no-cache\r\n"
-> "Expires: -1\r\n"
-> "X-Content-Type-Options: nosniff\r\n"
-> "Etag: W/\"2-vyGp6PvFo4RvsFtPoIWeCReyIC8\"\r\n"
-> "Via: 1.1 vegur\r\n"
-> "CF-Cache-Status: MISS\r\n"
-> "Server-Timing: cf-q-config;dur=1.3000000762986e-05\r\n"
-> "Report-To: {\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=yOr40jo%2BwS1KHzhTlVpl54beJ5Wx2FcG4gGV0XVrh3X9OlR5q4drUn2dkt5DGO4GDcE%2BVXT7CNgJvGs%2BZleIyMu8CLieFiDIvOviOY3EhHg94m0ZNZgrEdpKD0S85S507l1vsEwEHkoTm%2Ff19SiO\"}],\"group\":\"cf-nel\",\"max_age\":604800}\r\n"
-> "NEL: {\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}\r\n"
-> "Server: cloudflare\r\n"
-> "CF-RAY: 778977dc484ce591-DFW\r\n"
-> "alt-svc: h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400\r\n"
-> "\r\n"
reading 2 bytes...
-> "{}"
read 2 bytes
Conn keep-alive

# File 'lib/rubygems/vendor/net-http/lib/net/http.rb', line 1264

def set_debug_output(output)
  warn 'Gem::Net::HTTP#set_debug_output called after HTTP started', uplevel: 1 if started?
  @debug_output = output
end