Hi guys,

I'm sure i am abusing lua for completely wrong thing here.
But i do not understand why the result isn't at least consistent..

Ive got a Pinguïns.jpg of 759kB (Default Windows 7 example image)..
And have the configuration listed below.
When requesting the image from a browser the top of the image looks normal, but further down it starts morphing, or becomes complete garbage.. Increasing bufsize to 300000 makes the image show normal when reading and writing the whole image in 1 variable.. Though the buffer is still less than half of the image size.?.

What im wondering though is how can it be that the results with smaller bufsizes vary..?? Is it overflowing some memory? With 1.6dev1 it would crash after a few requests, dev2 seems to have fixed that.. Though the random behavior is still strange.. I would expect every time the same image is send it to be cut short at buffsize, or perhaps just work if lua might use its own memory buffers not limited to haproxy's buffsize?

Is it a bug? Or just a wrong lua script?
Should files / sockets be closed by the script? I get an error if i do..(attempt to use a closed file)

#    tune.bufsize 300000
    tune.lua.session-timeout  100000
    tune.lua.task-timeout     100000
    lua-load /var/etc/haproxy/hello_world.lua
listen proxy
    bind :10001
    tcp-request content lua hello_image

function hello_image(txn)
    txn.res:send("HTTP/1.1 200 OK\n\n")
    f = io.open("/var/etc/haproxy/Penguins.jpg", "rb")
    local block = 5000
    while true do
        local bytes = f:read(block)
        if not bytes then break end
--core.msleep(25); ## changes behavior to be somewhat more succesfull..
--f:close() ## [ALERT] 168/232309 (74397) : Lua function 'hello_image': runtime error: /var/etc/haproxy/hello_world.lua:8: attempt to use a closed file.

root@OPNsense:/usr/ports/net/haproxy-devel # haproxy -vv
HA-Proxy version 1.6-dev2-ad90f0d 2015/06/17
Copyright 2000-2015 Willy Tarreau <wi...@haproxy.org>

Build options :
  TARGET  = freebsd
  CPU     = generic
  CC      = cc

Default settings :
  maxconn = 2000, bufsize = 16384, maxrewrite = 8192, maxpollevents = 200

Encrypted password support via crypt(3): yes
Built with zlib version : 1.2.8
Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip")
Built with OpenSSL version : OpenSSL 1.0.2b 11 Jun 2015
Running on OpenSSL version : OpenSSL 1.0.2b 11 Jun 2015
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports prefer-server-ciphers : yes
Built with PCRE version : 8.35 2014-04-04
PCRE library supports JIT : yes
Built with Lua version : Lua 5.3.0
Built with transparent proxy support using: IP_BINDANY IPV6_BINDANY

Available polling systems :
     kqueue : pref=300,  test result OK
       poll : pref=200,  test result OK
     select : pref=150,  test result OK
Total: 3 (3 usable), will use kqueue.

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