XML#parse not working for response.body_io

[need47]

The XML#parse(io : IO) method seems not working correctly on response.body_io.

require "http/client"
require "xml"

url = "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi"
form = {
  "db" => "gene",
  "id" => "1956"
}

HTTP::Client.post_form(url, form) do |response|
  if response.status_code == 200
    # xml = XML.parse(response.body_io.gets_to_end) # this is ok
    xml = XML.parse(response.body_io) # not working
    p xml.to_xml
  end
end

Btw, the same example on play gave the following error:

Program received and didn't handle signal SYS (31)

[Sija]

Minimal code to make play fail with above error is:

require "http/client"
require "xml"

url = "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi"
form = {
  "db" => "gene",
  "id" => "1956"
}

HTTP::Client.post_form(url, form)

https://play.crystal-lang.org/#/r/1toc

[asterite]

@need47 When you say "seems not working correctly", what do you mean? I ran the snippet and it worked fine (outside of the playground)

[need47]

@asterite the snippet compiled and ran fine, while the output is not right. I'm expecting this: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=gene&id=1956

Basically I'm getting an empty xml now:

<?xml version="1.0"?>
<?xml version="1.0" encoding="UTF-8" ?>

[asterite]

Hmm... for some reason xml doesn't like to be fed small chunks of bytes. This happens because the current ssl socket is not buffered. If I change it to buffer it starts working well. I guess that's a solution though I don't know why libxml works wrong otherwise.

[need47]

@asterite thanks for the quick fix.

Should I create a new issue for the "playground"?

Program received and didn't handle signal SYS (31)