nginx lua resty.upload (read http headers)

_upload_dump_header.lua

local resty_sha1 = require "resty.sha1"
local upload     = require "resty.upload"

local chunk_size = 4096
local form       = upload:new(chunk_size)

while true do
  local typ, res, err = form:read()
  
  ngx.say("### header 1")
  ngx.say(res[1])
  ngx.say(res[2])
  ngx.say(res[3])
  
  local file_name = string.match(res[2], "filename=\"(.+)\"")
  ngx.say("file name : " .. file_name)
  
  local typ, res, err = form:read()
  ngx.say("### header 2")
  ngx.say(res[1])
  ngx.say(res[2])
  ngx.say(res[3])
  
  local img_type = string.match(res[2], "image/(.+)")
  ngx.say("image type : " .. img_type)
end

result

# curl -F [email protected] http://localhost/xxx

### header 1
Content-Disposition
form-data; name="file"; filename="test.jpg"
Content-Disposition: form-data; name="file"; filename="test.jpg"
file name : test.jpg

### header 2
Content-Type
image/jpeg
Content-Type: image/jpeg
image type jpeg