Question

我正在尝试使用Ruby on Rails从哈希创建http参数，我尝试使用URI.encode_www_form(params)，但这并没有正确生成参数。

以下是我的哈希

params['Name'.to_sym] = 'Nia Kun'
params['AddressLine1'.to_sym] = 'Address One'
params['City'.to_sym] = 'City Name'

This method converts space to +，我想要的是convert space with %20

我收到"Name=Nia+Kun&AddressLine1=Address+One&City=City+Name"，但我需要将这些空格转换为％20

Answer 1

你可以这样做：

URI.encode_www_form(params).gsub("+", "%20")

如果那真的是你需要的。

另见When to encode space to plus (+) or %20?为什么会这样做。

Answer 2

您可以编写自定义方法。像这样：

p = {x: 'some word', y: 'hello there'}
URI.encode p.to_a.map {|inner| inner.join('=') }.join('&')
# "x=some%20word&y=hello%20there"

所以基本上你将params展平为数组数组，然后将它们转换为url字符串，然后对其进行编码。

编辑：

最终解决方案将如下所示：

def encode_url(params)
  URI.encode params.to_a.map {|inner| inner.join('=')}.join('&')
end

encode_url(my_params)

Answer 3

您可以使用GSUB：

myString.gsub(" ", "%20")

引用doc：

此方法不会转换*， - ，。，0-9，A-Z，_，a-z，但会将SP（ASCII空间）转换为+并将其他转换为％XX。

Answer 4

What you are looking for is URI::escape.

URI::escape "this big string"
=> "this%20big%20string"

EDIT

Bringing it all together:

You don't need to convert to symbols for your params, rails is smart and knows about with_indifferent_access. Strings and symbols will both work.
Your code would look like this:

.

name = params['Name']# = 'Nia Kun'
address_one = params['AddressLine1']# = 'Address One'
city = params['City']# = 'City Name'

URI::encode "http://www.example.com?name=#{name}&address_one=#{address_one}&city=#{city}"

#=> "http://www.example.com?name=Nia%20Kun&address_one=Address%20One&city=City%20Name"

encode_www_form将空格转换为+而不是％20

4 个答案: