How do I POST XML using Faraday and receive response? - ruby

Question

I am attempting to learn Ruby/Faraday. I need to POST XML to a RESTful web service and am confused on how to do this.
I have a string containing the XML as follows:
require "faraday"
require "faraday_middleware"
mystring = %&<xml><auth><user userid='username' pwd='password'/></auth></xml>&
How do I post the XML to a URL and receive the result? I am trying to do something like:
conn = Faraday.new(:url=>'http://url')
conn.post '/logon' {mystring}
I get the message:
SyntaxError: (irb):11: syntax error, unexpected '{', expecting $end
conn.post '/logon' {mystring}
Edit 1
I have gotten the POST request to work. My code is provided below.
require "faraday"
require "faraday_middleware"
myString = %&<xml><auth><user userid='username' pwd='password'/></auth></xml>&
myUrl = %&url&
conn = Faraday.new(:url => myUrl) do |builder|
builder.response :logger #logging stuff
builder.use Faraday::Adapter::NetHttp #default adapter for Net::HTTP
end
res = conn.post do |request|
request.url myUrl
request.body = myString
end
puts res.body

Answer 1

According to the documentation:
conn = Faraday.new(:url=>'http://url')
conn.post '/logon', mystring
There are two errors in your code. The first one is that you are missing a comma between the URL and the variable causing { mystring } to be interpreted as a block.
The second error is that mystring already holds a string and the following code does not make sense in Ruby:
{ "string" }
Thus conn.post '/logon', mystring is wrong. So the final result is:
conn = Faraday.new(:url=>'http://url')
conn.post '/logon', mystring
or:
conn = Faraday.new(:url=>'http://url')
conn.post '/logon', { :key => mystring }
if you want to submit a key/value POST body. But this is not your case, because you are already posting an XML body.