Ruby/Rails Net::HTTP.post_form 嵌套散列项 html 已转义

Question

例如我在 Rails 控制台中执行此操作：

params = {"type"=>["raka"], "fields"=>["exhb_0", "exh0_1", "t_g_a", "hp_1", "s1", "overflade_0", "t2", "t3", "t4"], "railing"=>["A-3"], "wood"=>["wood_6"], "railing_m"=>"0", "order"=>{"sving"=>"right", "size"=>{"ground"=>"123", "floor"=>"6", "a"=>"6", "d"=>"6"}, "comments"=>{"step_2"=>"", "step_3"=>"", "step_4"=>""}, "railing"=>{"1"=>"1", "2"=>"1"}, "railing_m"=>{"1"=>"", "2"=>"", "3"=>"", "4"=>"12"}, "hul"=>{"l"=>"123", "b"=>"123"}, "name"=>"qwed", "email"=>"mail@example.com", "phone"=>"13123", "street"=>"iuuj", "city"=>"ui", "postnr"=>"213"}}

x = Net::HTTP.post_form(URI.parse('http://localhost:3000/download.pdf'), params)

在我的 Rails 控制台中，我可以看到 HTTP 发布请求：

Started POST "/download.pdf" for 127.0.0.1 at 2013-04-15 16:25:36 +0200
Processing by PublicController#show_pdf as */*
  Parameters: {"type"=>"raka", "fields"=>"t4", "railing"=>"A-3", "wood"=>"wood_6
", "railing_m"=>"0", "order"=>"{\"sving\"=>\"right\", \"size\"=>{\"ground\"=>\"1
23\", \"floor\"=>\"6\", \"a\"=>\"6\", \"d\"=>\"6\"}, \"comments\"=>{\"step_2\"=>
\"\", \"step_3\"=>\"\", \"step_4\"=>\"\"}, \"railing\"=>{\"1\"=>\"1\", \"2\"=>\"
1\"}, \"railing_m\"=>{\"1\"=>\"\", \"2\"=>\"\", \"3\"=>\"\", \"4\"=>\"12\"}, \"h
ul\"=>{\"l\"=>\"123\", \"b\"=>\"123\"}, \"name\"=>\"qwed\", \"email\"=>\"mail@example.com\", \"phone\"=>\"13123\", \"street\"=>\"iuuj\", \"city\"=>\"ui\", \"postn
r\"=>\"213\"}"}

问题是所有嵌套的 http 参数都是 HTML 转义的。我该如何摆脱它？

Answer 1

.post_form 方法接受字符串，因此在传递嵌套哈希时会导致此转义问题。我也遇到了同样的问题，改用.post方法，解决了。

require "net/http"
uri = URI('http://www.yoururl.com')
http = Net::HTTP.new(uri.host)
response = http.post(uri.path, params.to_query) 

还要注意使用.to_query 方法将散列转换为字符串。 See here

Answer 2

在 Rails 世界中，params 不是 Ruby 开箱即用的常规 Hash 对象。事实上，它是由 Rails 提供的HashWithIndifferentAccess，它允许以符号或字符串的形式访问键。

irb(main):001:0>params = {"type"=>["raka"], "fields"=>["exhb_0", "exh0_1", "t_g_a", "hp_1", "s1", "overflade_0", "t2", "t3", "t4"], "railing"=>["A-3"], "wood"=>["wood_6"], "railing_m"=>"0", "order"=>{"sving"=>"right", "size"=>{"ground"=>"123", "floor"=>"6", "a"=>"6", "d"=>"6"}, "comments"=>{"step_2"=>"", "step_3"=>"", "step_4"=>""}, "railing"=>{"1"=>"1", "2"=>"1"}, "railing_m"=>{"1"=>"", "2"=>"", "3"=>"", "4"=>"12"}, "hul"=>{"l"=>"123", "b"=>"123"}, "name"=>"qwed", "email"=>"mail@example.com", "phone"=>"13123", "street"=>"iuuj", "city"=>"ui", "postnr"=>"213"}}
irb(main):002:0>params.class
=> Hash
irb(main):003:0>params[:fields]
=> nil
irb(main):004:0>params = params.with_indifferent_access
irb(main):005:0>params.class
=> ActiveSupport::HashWithIndifferentAccess
irb(main):006:0>params[:fields]
=> ["exhb_0", "exh0_1", "t_g_a", "hp_1", "s1", "overflade_0", "t2", "t3", "t4"]