From 475c97ffd7e5bafcd620d026151dfc26c6f5ddf0 Mon Sep 17 00:00:00 2001
From: Ethan Turkeltaub <ethan.turkeltaub@gmail.com>
Date: Wed, 26 Jun 2019 16:46:08 -0400
Subject: [PATCH] Add the ability to set Content-ID header for ParamPart

---
 lib/parts.rb       | 1 +
 spec/parts_spec.rb | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/lib/parts.rb b/lib/parts.rb
index ee46c72..351cfce 100644
--- a/lib/parts.rb
+++ b/lib/parts.rb
@@ -52,6 +52,7 @@ def length
     def build_part(boundary, name, value, headers = {})
       part = ''
       part << "--#{boundary}\r\n"
+      part << "Content-ID: #{headers["Content-ID"]}\r\n" if headers["Content-ID"]
       part << "Content-Disposition: form-data; name=\"#{name.to_s}\"\r\n"
       part << "Content-Type: #{headers["Content-Type"]}\r\n" if headers["Content-Type"]
       part << "\r\n"
diff --git a/spec/parts_spec.rb b/spec/parts_spec.rb
index ceaab6e..b542c04 100644
--- a/spec/parts_spec.rb
+++ b/spec/parts_spec.rb
@@ -99,4 +99,9 @@ def content_type; 'application/data'; end
   it "test_correct_length" do
     assert_part_length @part
   end
+
+  it "test_content_id" do
+    part = Parts::ParamPart.new("boundary", "with_content_id", "foobar", "Content-ID" => "id")
+    expect(part.to_io.read).to match(/Content-ID: id/)
+  end
 end