语法错误，意外的输入结束，应为keyword_end

Question

我正在尝试编写一个简单的程序来从API调用的结果中解析JSON。ruby是个新手，就是搞不懂这一点。

下面是所有的代码：

require "rubygems"
require "json"
require "net/http"
require "uri"

uri = URI.parse("http://api.chartbeat.com/live/recent/v3/?apikey=eaafffb9a735796b6edd50fd31eaab69&host=enactus.org")

http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Get.new(uri.request_uri)

response = http.request(request)

if response.code == "200"
  result = JSON.parse(response.body)

  result.each do |doc|
    puts doc["id"] #reference properties like this
    puts doc # this is the result in object form    
    puts ""
    puts ""
  end
else
  puts "ERROR!!!"
end

下面是运行该程序(chartbeat.rb)的输出：

chartbeat.rb:14: syntax error, unexpected end-of-input, expecting keyword_end

程序原封不动地从这里开始，但替换了url：https://gist.github.com/timsavery/1657351

Answer 1

看起来你所做的并没有利用任何Net::HTTPs的能力，所以我可能会这样做：

require "rubygems"
require "json"
require "open-uri"

response = open("http://api.chartbeat.com/live/recent/v3/?apikey=eaafffb9a735796b6edd50fd31eaab69&host=enactus.org").read

result = JSON.parse(response)

result.each do |doc|
  puts doc["id"] #reference properties like this
  puts doc # this is the result in object form
  puts ""
  puts ""
end

OpenURI是很多命中URL的代码的基础，也是一个很好的起点。

如果您希望捕获引发的异常，请使用类似以下内容：

begin
  response = open("http://api.chartbeat.com/live/recent/v3/?apikey=eaafffb9a735796b6edd50fd31eaab69&host=enactus.org").read
rescue Exception => e
  puts e.message
  exit
end

它甚至可以简化为：

require "rubygems"
require "json"
require "open-uri"

JSON[
  open("http://api.chartbeat.com/live/recent/v3/?apikey=eaafffb9a735796b6edd50fd31eaab69&host=enactus.org").read
].each do |doc|
  puts doc["id"] #reference properties like this
  puts doc # this is the result in object form
  puts ""
  puts ""
end

但这可能过于激进了。