Issue #12038 has been updated by Yui NARUSE.

Status changed from Open to Third Party's Issue

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Feature #12038: Please add documentation to open-uri showing how to obtain an attachment
https://bugs.ruby-lang.org/issues/12038#change-56798

* Author: Robert A. Heiler
* Status: Third Party's Issue
* Priority: Normal
* Assignee: 
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The current documentation for open-uri is at:

  ruby-doc.org/stdlib-2.3.0/libdoc/open-uri/rdoc/OpenURI.html

I am trying to download:

  http://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=nuccore&id=189458859&rettype=fasta&retmode=text

This gives a text file (fasta file) which has sequence information for a human gene.

With open-uri I get this metadata:

#<StringIO:0xb863bd6c
 @base_uri=
  #<URI::HTTP http://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=nuccore&id=189458859&rettype=fasta&retmode=text>,
 @meta=
  {"date"=>"Sat, 30 Jan 2016 10:37:29 GMT",
   "server"=>"Apache",
   "access-control-allow-origin"=>"*",
   "cache-control"=>"private",
   "content-disposition"=>"attachment; filename=sequence.fasta",
   "ncbi-sid"=>"9DFD1FFC6AC92691_0807SID",
   "content-type"=>"text/plain",
   "set-cookie"=>
    "ncbi_sid=9DFD1FFC6AC92691_0807SID; domain=.nih.gov; path=/; expires=Mon, 30 Jan 2017 10:37:29 GMT",
   "x-ua-compatible"=>"IE=Edge",
   "transfer-encoding"=>"chunked"},
 @metas=
  {"date"=>["Sat, 30 Jan 2016 10:37:29 GMT"],
   "server"=>["Apache"],
   "access-control-allow-origin"=>["*"],
   "cache-control"=>["private"],
   "content-disposition"=>["attachment; filename=sequence.fasta"],
   "ncbi-sid"=>["9DFD1FFC6AC92691_0807SID"],
   "content-type"=>["text/plain"],
   "set-cookie"=>
    ["ncbi_sid=9DFD1FFC6AC92691_0807SID; domain=.nih.gov; path=/; expires=Mon, 30 Jan 2017 10:37:29 GMT"],
   "x-ua-compatible"=>["IE=Edge"],
   "transfer-encoding"=>["chunked"]},
 @status=["200", "OK"]>

I assume that the important part is:

   "content-disposition"=>["attachment; filename=sequence.fasta"]

So there is an attachment.

I googled, found some stackoverflow answers; most refer to rails
though but I want a pure ruby solution.

Now here is my request:

- Could someone show a simple example for the open-uri documentation
in how users are able to obtain an attachment, if this fits to
open-uri? (If it does not fit to open-uri, then this can be
omitted; but if default ruby provides this, perhaps some documentation
can be added for that).

Thanks for reading anyway!



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