Ruby:如何将哈希转换为 HTTP 参数? [英] Ruby: How to turn a hash into HTTP parameters?

问题描述

使用像

{:a => "a", :b => "b"} 

这将转化为

"a=a&b=b"

但是你怎么处理像

{:a => "a", :b => ["c", "d", "e"]} 

应该翻译成

"a=a&b[0]=c&b[1]=d&b[2]=e" 

或者更糟的是，(做什么)像这样:

Or even worse, (what to do) with something like:

{:a => "a", :b => [{:c => "c", :d => "d"}, {:e => "e", :f => "f"}]

非常感谢您的帮助！

推荐答案

更新:此功能已从 gem 中删除.

Update: This functionality was removed from the gem.

Julien，你的自我回答很好，我无耻地借鉴了它，但它没有正确地转义保留字符，而且还有一些其他的边缘情况会失效.

Julien, your self-answer is a good one, and I've shameless borrowed from it, but it doesn't properly escape reserved characters, and there are a few other edge cases where it breaks down.

require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a => "a", :b => ["c", "d", "e"]}
uri.query
# => "a=a&b[0]=c&b[1]=d&b[2]=e"
uri.query_values = {:a => "a", :b => [{:c => "c", :d => "d"}, {:e => "e", :f => "f"}]}
uri.query
# => "a=a&b[0][c]=c&b[0][d]=d&b[1][e]=e&b[1][f]=f"
uri.query_values = {:a => "a", :b => {:c => "c", :d => "d"}}
uri.query
# => "a=a&b[c]=c&b[d]=d"
uri.query_values = {:a => "a", :b => {:c => "c", :d => true}}
uri.query
# => "a=a&b[c]=c&b[d]"
uri.query_values = {:a => "a", :b => {:c => "c", :d => true}, :e => []}
uri.query
# => "a=a&b[c]=c&b[d]"

宝石是'可寻址'

gem install addressable

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