HTTPS support ?

[sebcante]

Hi,

First let me congrats you with great lib. I was just wondering if HTTPS was supported ? i do not think to have any luck with it. i managed to get http working ok.

thanks

-seb

local hc = http:new()
local ok, code, headers, status, body  = hc:request {
    url = "https://secure.com/auth",
    method = "POST", 
    scheme = "https",
    port = "443",
    headers = { ["Content-Length"] = string.len(post_args_escaped), ["Content-Type"] = "application/x-www-form-urlencoded" },
    body = post_args_escaped,
}

[chase]

HTTPS is not supported as the Lua Nginx module's cosockets do not support SSL.

[sebcante]

thanks chase for the quick answer. would you know any other alternative to HTTP post via SSL from lua nginx?

[chase]

I'm fairly certain you can make HTTPS requests using nginx's proxy_pass and a subrequest from Lua Nginx

@leafo created an elagent solution use the aforementioned method.
The language you see in the example is MoonScript, a language like CoffeeScript but for Lua.

The code for proxy_http.moon roughly compiles to:

-- proxy_http.lua
-- This implements LuaSocket's http.request on top of a proxy_pass within
-- nginx.
--
-- Add the following location to your server:
--
-- location /proxy {
--     internal;   
--     rewrite_by_lua "
--       local req = ngx.req
--       req.clear_header'Cookie'
--       req.clear_header'Accept-Encoding'
--       req.clear_header'User-Agent'
--       if ngx.ctx.headers then
--         for k,v in pairs(ngx.ctx.headers) do
--           req.set_header(k, v)
--         end
--       end
--     ";
-- 
--     resolver 8.8.8.8;
--     proxy_pass $_url;
-- }

local ltn12 = require("ltn12")
local proxy_location = "/proxy"
local methods = {
  ["GET"] = ngx.HTTP_GET,
  ["HEAD"] = ngx.HTTP_HEAD,
  ["PUT"] = ngx.HTTP_PUT,
  ["POST"] = ngx.HTTP_POST,
  ["DELETE"] = ngx.HTTP_DELETE,
  ["OPTIONS"] = ngx.HTTP_OPTIONS
}
local set_proxy_location
set_proxy_location = function(loc)
  proxy_location = loc
end
local request
request = function(url, str_body)
  local return_res_body
  local req
  if type(url) == "table" then
    req = url
  else
    return_res_body = true
    req = {
      url = url,
      source = str_body and ltn12.source.string(str_body)
    }
  end
  req.method = req.method or (req.source and "POST" or "GET")
  local body
  if req.source then
    local buff = { }
    local sink = ltn12.sink.table(buff)
    ltn12.pump.all(req.source, sink)
    body = table.concat(buff)
  end
  local res = ngx.location.capture(proxy_location, {
    method = methods[req.method],
    body = body,
    ctx = {
      headers = req.headers
    },
    vars = {
      _url = req.url
    }
  })
  local out
  if return_res_body then
    out = res.body
  else
    if req.sink then
      ltn12.pump.all(ltn12.source.string(res.body), req.sink)
    end
    out = 1
  end
  return out, res.status, res.header
end
return {
  request = request,
  set_proxy_location = set_proxy_location
}

[sebcante]

good news!, it looks like @agentzh is looking at adding support for SSL for lua nginx module's cosocket (openresty/lua-nginx-module#178)

[sebcante]

i ll give that a try thanks chase!

[leafo]

There were some issues with headers in the snippet above. I've fixed it. You can find the updated version here: https://github.com/leafo/heroku-openresty/wiki/Making-HTTP-Requests

Also it's worth noting that with this method you can't use any hosts that are local to your system, like localhost. It has to be a url that be resolved by 8.8.8.8, or an IP address. Just so you know why it won't work when you try to fetch localhost :).

[ziontab]

Starting from lua-nginx-module 0.9.11 cosockets support SSL openresty/lua-nginx-module#290

[wendal]

done