RubyでRestAPIにJSONをPOSTしたい

Question

https://developer.yahoo.co.jp/webapi/jlp/keyphrase/v2/extract.html

ヤフーのAPIを使いたいと思っています。RubyもAPIもJsonもPOSTも初心者です。いろいろ試したり、検索しても出てこなかったのでご教授下さい。

# ヤフーのAPIでキーフレーズ抽出したいよー
# https://developer.yahoo.co.jp/webapi/jlp/keyphrase/v2/extract.html
require 'json'
require 'uri'
require 'net/http'

APPID = "ないしょ"

def post(query)
    header = {
        "Content-Type": "application/json",
        "User-Agent": "Yahoo AppID: {#{APPID}}"
    }
    param = {
        "id": "1234-1",
        "jsonrpc": "2.0",
        "method": "jlp.keyphraseservice.extract",
        "params": {
        "q": query
        }
    }

    param = param.to_json

    # uri = URI('https://jlp.yahooapis.jp/KeyphraseService/V2/extract')
    uri = URI.parse("https://jlp.yahooapis.jp/KeyphraseService/V2/extract")

    http = Net::HTTP.new(uri.host,uri.port)
    response = http.post(uri.path,param,header)

    response.code
    response.body
end

puts post("東京ミッドタウンから国立新美術館まで歩いて5分で着きます。")

エラーコード

/Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:515:in `post': undefined method `hostname' for "/KeyphraseService/V2/extract":String (NoMethodError)
	from test1.rb:29:in `post'
	from test1.rb:35:in `<main>'
USER@USERnoAir Keyphrase % ruby test1.rb
/Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:227:in `rbuf_fill': end of file reached (EOFError)
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:193:in `readuntil'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:203:in `readline'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/response.rb:42:in `read_status_line'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/response.rb:31:in `read_new'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1557:in `block in transport_request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1548:in `catch'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1548:in `transport_request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1521:in `request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1514:in `block in request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:960:in `start'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1512:in `request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1535:in `send_entity'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1323:in `post'
	from test1.rb:29:in `post'
	from test1.rb:35:in `<main>'

また、headerを「header.to_json」として送ると、以下のエラーが出ました。

/Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/generic_request.rb:36:in `initialize': undefined method `keys' for "{\"Content-Type\":\"application/json\",\"User-Agent\":\"Yahoo AppID: {dj00aiZpPVVnQ1BVVlRjaG5GeiZzPWNvbnN1bWVyc2VjcmV0Jng9NGE-}\"}":String (NoMethodError)
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/request.rb:15:in `initialize'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1535:in `new'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1535:in `send_entity'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1323:in `post'
	from test1.rb:29:in `post'
	from test1.rb:35:in `<main>'

<<追記>>
最初の「require 'net/http'」を「require 'net/https'」に改めて実行すると以下のエラー

USER@USERnoAir Keyphrase % ruby test1.rb
/Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:227:in `rbuf_fill': end of file reached (EOFError)
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:193:in `readuntil'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/protocol.rb:203:in `readline'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/response.rb:42:in `read_status_line'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http/response.rb:31:in `read_new'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1557:in `block in transport_request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1548:in `catch'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1548:in `transport_request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1521:in `request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1514:in `block in request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:960:in `start'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1512:in `request'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1535:in `send_entity'
	from /Users/USER/.rbenv/versions/3.0.2/lib/ruby/3.0.0/net/http.rb:1323:in `post'
	from test1.rb:29:in `post'
	from test1.rb:35:in `<main>'

ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [arm64-darwin20]

Answer 1

"Yahoo AppID: {#{APPID}}" の部分で、外側の {} は不要です。これを削除すると JSON テキストが返ってきます。

    header = {
        "Content-Type": "application/json",
        "User-Agent": "Yahoo AppID: #{APPID}"
    }

#
{"id":"1234-1","jsonrpc":"2.0","result":{"phrases":[{"score":100,"text":"東京ミッドタウン"},{"score":73,"text":"国立新美術館"},{"score":37,"text":"5分"}]}}

Comments

[decatail]

大変ありがとうございます！！！！！！！！
動きました。垢バンされたのかと思って調べていた所でした。
https://developer.yahoo.co.jp/webapi/jlp/sample/sample12.html
ここのpythonのコードから拝借したのですが、{}が要らなかったのですね。

Answer 2

https://qastack.jp/programming/5244887/eoferror-end-of-file-reached-issue-with-nethttp

上記URLから拝借。

「http.use_ssl = true」
これを追加すれば、動いた。しかし、ヤフーから帰ってきたのはエラーコードであった。もう少し探ってみよう。

{
"Error" : {
"Message" : "Your Request was Forbidden"
}
}