I'm using Ruby Net::HTTP under a NginX/Phusion Passenger server, attempting to POST a JSON string to the server. It appears that my POST, only when sending as 'application/json', prematurely closes the session to the server. I.E.:
On the server side:
127.0.0.1 - - [03/Sep/2013 07:47:14] "POST /path/to/submit " 200 45 0.0013
pid=12893 thr=47197563169088 file=ext/nginx/HelperAgent.cpp:933 time=2013-09-03 07:47:14.830 ]: Uncaught exception in PassengerServer client thread:
exception: Cannot read response from backend process: Connection reset by peer (104)
backtrace:
in 'void Client::forwardResponse(Passenger::SessionPtr&, Passenger::FileDescriptor&, const Passenger::AnalyticsLogPtr&)' (HelperAgent.cpp:698)
in 'void Client::handleRequest(Passenger::FileDescriptor&)' (HelperAgent.cpp:859)
in 'void Client::threadMain()' (HelperAgent.cpp:952)
A client side debug session is:
opening connection to hostname.com...
opened
<- "POST /path/to/submit HTTP/1.1\r\nContent-Type: application/json\r\nAccept: application/json\r\nUser-Agent: agent+test\r\nConnection: close\r\nHost: hostname.com\r\nContent-Length: 660\r\n\r\n"
<- "[{json string}]"
-> "HTTP/1.1 301 Moved Permanently\r\n"
-> "Server: nginx/1.2.6\r\n"
-> "Date: Tue, 03 Sep 2013 14:47:15 GMT\r\n"
-> "Content-Type: text/html\r\n"
-> "Content-Length: 184\r\n"
-> "Connection: close\r\n"
-> "Location: https://hostname.com/path/to/submit\r\n"
-> "\r\n"
reading 184 bytes...
-> "<html>\r\n<head><title>301 Moved Permanently</title></head>\r\n<body bgcolor=\"white\">\r\n<center><h1>301 Moved Permanently</h1></center>\r\n<hr><center>nginx/1.2.6</center>\r\n</body>\r\n</html>\r\n"
read 184 bytes
Conn close
opening connection to hostname.com...
opened
<- "POST /path/to/submit HTTP/1.1\r\nContent-Type: application/json\r\nAccept: application/json\r\nUser-Agent: agent+test\r\nConnection: close\r\nHost: hostname.com\r\nContent-Length: 660\r\n\r\n"
<- "[{json string}]"
-> "HTTP/1.1 200 OK\r\n"
-> "Content-Type: text/html;charset=utf-8\r\n"
-> "Content-Length: 45\r\n"
-> "Connection: close\r\n"
-> "Status: 200\r\n"
-> "X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 3.0.17\r\n"
-> "X-Frame-Options: SAMEORIGIN\r\n"
-> "X-XSS-Protection: 1; mode=block\r\n"
-> "X-Content-Type-Options: nosniff\r\n"
-> "Server: nginx/1.2.6 + Phusion Passenger 3.0.17 (mod_rails/mod_rack)\r\n"
-> "Strict-Transport-Security: max-age=31536000\r\n"
-> "X-Frame-Options: DENY\r\n"
-> "\r\n"
reading 45 bytes...
-> "some url string" <-- this is suspicous to me.
read 45 bytes
Conn close
The code I'm using to submit my data is:
private
def _http_client(method = 'get', location = nil, limit = 10)
raise ArgumentError, 'FATAL: too many HTTP redirects attempted...' if limit == 0
response = nil
if location.nil?
if @uri.nil?
raise ArgumentError 'FATAL: no location specified. Quitting.'
end
else
@uri = URI.parse(location)
end
client = Net::HTTP.new(@uri.host,@uri.port)
client.open_timeout = 15 # in seconds
client.read_timeout = 15 # in seconds
initheader = {'content-type' => 'application/json',
'accept' => 'application/json',
'user-agent' => UA ,}
client.set_debug_output $stderr # XXX TEMPORARY
if @uri.scheme == 'https'
client.use_ssl = true
client.verify_mode = 0
end
if method == 'post'
serialized = JSON.generate(@payload)
response = client.send_request('POST',@uri.path,serialized,initheader = initheader)
puts serialized
end
# Only intended for pings. In order to do
# full GETs (including query_params) this
# will need to be refactored a little.
if method == 'get'
response = client.get(@uri.path)
end
case response
when Net::HTTPSuccess
@status = true
when Net::HTTPMovedPermanently
@status = false
limit = limit - 1
_http_client(method,response['location'],limit)
when Net::HTTPClientError
$stderr.puts 'Client error.'
@status = false
when Net::HTTPServerError
$stderr.puts 'Server error.'
@status = false
else
$stderr.puts 'No idea what the server returned.'
@status = false
end
unless response.nil?
@response = {:code => response.code, :body => (response.body || 'OK')}
@code = @response[:code].to_s
@http_body = @response[:body].to_s
else
$stderr.puts 'response from server was empty. :('
end
_send_status
end
I'm using:
- Ruby version: 1.9.3p448
- NginX 1.2.6
- Passenger 3.0.17
I'm pretty sure I might be doing something wrong, but I'm new to Ruby and semi-new to this kind of web programming.
The code snippet above uses the send_request method but I've also tried post, and post2, resulting in the same outcome.
It's really suspicious to me that as soon as I use 'application/json' in my initheader everything breaks. When I remove it, everything works alright.
