Could not parse data entirely

[kenn]

Moved from igrigorik/em-http-request#240

em-http-request does not work for http://hashbang.ca/.

The following script:

require 'em-http-request'

EM.run do
  http = EM::HttpRequest.new('http://hashbang.ca/').head
  http.callback do
    puts "success"
    EM.stop
  end
  http.errback do
    puts "error: #{http.error}"
    EM.stop
  end
end

...returns this error.

error: Could not parse data entirely (389 != 645)

With telnet, I get the following response headers:

$ telnet hashbang.ca 80
Trying 178.79.155.139...
Connected to hashbang.ca.
Escape character is '^]'.
HEAD / HTTP/1.0

HTTP/1.1 200 OK
Server: nginx/1.4.1
Date: Tue, 23 Jul 2013 08:53:11 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Vary: Accept-Encoding
X-Powered-By: PHP/5.3.10-1ubuntu3.7
X-Pingback: http://hashbang.ca/xmlrpc.php
Expires: Tue, 23 Jul 2013 09:53:11 GMT
Cache-Control: max-age=3600
Strict-Transport-Security: max-age=31536000
Content-Security-Policy-Report-Only:
        default-src 'self';
        img-src *; style-src 'unsafe-inline' 'self';
        script-src platform.twitter.com rum-static.pingdom.net 'unsafe-inline' 'self';
        frame-src speakerdeck.com 'self';
        report-uri http://csp.hashbang.ca;

Connection closed by foreign host.

...where Content-Security-Policy-Report-Only looks odd. Could you give me any insights with the error?

FYI, browsers and net/http works fine with the site.

[tboyko]

@kenn Did you come to any conclusions on this problem?

[kenn]

Nope, but to be honest I haven't been following either http_parser or em-http-request lately.

[janko]

I have the same problem, for me this error is raised when there is some binary body in the same string as headers, because this fails:

parser = HTTP::Parser.new
parser.on_body { |chunk| }
parser << "HTTP/1.1 200 OK\r\nServer: gunicorn/19.7.0\r\nDate: Wed, 21 Jun 2017 06:26:07 GMT\r\nConnection: close\r\nTransfer-Encoding: chunked\r\nContent-Type: application/octet-stream\r\nAccess-Control-Allow-Origin: *\r\nAccess-Control-Allow-Credentials: true\r\n\r\n\xD8\xC2kB\x82g\xC8Mz\x95"

HTTP::Parser::Error: Could not parse data entirely (242 != 250)                                                                                                                      

while this succeeds:

parser = HTTP::Parser.new
parser.on_body { |chunk| }
parser << "HTTP/1.1 200 OK\r\nServer: gunicorn/19.7.0\r\nDate: Wed, 21 Jun 2017 06:25:27 GMT\r\nConnection: close\r\nAccept-Ranges: bytes\r\nETag: range1000\r\nContent-Type: application/octet-stream\r\nContent-Length: 1000\r\nContent-Range: bytes 0-999/1000\r\nAccess-Control-Allow-Origin: *\r\nAccess-Control-Allow-Credentials: true\r\n\r\nabcdefghijklmnopqrst"