From: Martin Bosslet Date: 2011-11-28T09:52:31+09:00 Subject: [ruby-core:41340] [ruby-trunk - Feature #5678][Open] StringIO#to_str Issue #5678 has been reported by Martin Bosslet. ---------------------------------------- Feature #5678: StringIO#to_str http://redmine.ruby-lang.org/issues/5678 Author: Martin Bosslet Status: Open Priority: Normal Assignee: Nobuyoshi Nakada Category: ext Target version: 2.0.0 The following raises an error currently: require 'stringio' require 'openssl' io = StringIO.new(OpenSSL::ASN1::Integer.new(1).to_der) asn = OpenSSL::ASN1.decode io The reason is that ossl_obj2bio[1] looks for a T_FILE first, and then it tries to coerce the input to a String using StringValue. StringValue itself again expects the presence of to_str, which is currently missing for StringIO, but could be easily provided by aliasing StringIO#string. I could imagine that the heuristic of ossl_obj2bio is quite common when working on binary data in a C extension. Would it therefore be OK to add StringIO#to_str? Patch attached. [1] https://github.com/ruby/ruby/blob/trunk/ext/openssl/ossl_bio.c#L17 -- http://redmine.ruby-lang.org