Export csv gz decompression

lib/didww/resource/export.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 require 'forwardable'
 require 'down/http'
+require 'zlib'
+require 'stringio'
 require 'didww/callback/const'
 
 module DIDWW
@@ -52,11 +54,23 @@ def initialize(params = {})
         super params.reverse_merge(filters: {})
       end
 
-      def csv
+      def download
         return unless url.present?
         Down::Http.new(headers: { 'Api-Key' => DIDWW::Client.api_key, 'X-DIDWW-API-Version' => DIDWW::Client.api_version }).open(url)
       end
 
+      def csv
+        file = download
+        return unless file
+        gz = Zlib::GzipReader.new(file)
+        begin
+          StringIO.new(gz.read)
+        ensure
+          gz.close unless gz.closed?
+          file.close if file.respond_to?(:close) && !file.closed?
+        end
+      end
+
       def complete?
         status == STATUS_COMPLETED
       end

spec/didww/resources/export_spec.rb

@@ -32,26 +32,27 @@
         end
       end
 
-      describe '#csv' do
-        let (:csv_io) { export.csv }
+      describe '#download' do
+        let (:download_io) { export.download }
 
         describe 'when file is ready' do
           before do
             stub_request(:get, export.url).to_return(
               status: 200,
-              body: api_fixture('exports/id/get/csv_download/200', ext: :csv),
-              headers: { 'Content-Type' => 'text/csv' }
+              body: File.binread(File.expand_path('../../fixtures/exports/id/get/csv_download/200.csv.gz', __dir__)),
+              headers: { 'Content-Type' => 'application/octet-stream' }
             )
           end
           it 'does not raise an error' do
-            expect { export.csv }.to_not raise_error
+            expect { export.download }.to_not raise_error
           end
-          it 'returs a readable object' do
-            expect(csv_io).to be_kind_of(Down::ChunkedIO)
-            expect(csv_io.read).to be_kind_of(String)
+          it 'returns a readable object' do
+            expect(download_io).to be_kind_of(Down::ChunkedIO)
+            expect(download_io.read).to be_kind_of(String)
           end
-          it 'has csv caption' do
-            expect(csv_io.read).to start_with('Date/Time (UTC),Source,DID,Destination')
+          it 'returns gzip data' do
+            magic = download_io.read(2)
+            expect(magic.bytes).to eq([0x1f, 0x8b])
           end
         end
 
@@ -61,11 +62,11 @@
           end
           it 'does not call the api' do
             WebMock.reset!
-            expect { export.csv }.to_not raise_error
+            expect { export.download }.to_not raise_error
             expect(a_request(:any, /.*/)).to_not have_been_made
           end
-          it 'returs nil' do
-            expect(csv_io).to be_nil
+          it 'returns nil' do
+            expect(download_io).to be_nil
           end
         end
 
@@ -74,13 +75,52 @@
             stub_request(:get, export.url).to_return(status: 404, body: '')
           end
           it 'raises a NotFound error' do
-            expect { export.csv }.to raise_error(Down::ClientError)
+            expect { export.download }.to raise_error(Down::ClientError)
           end
         end
 
       end
     end
 
+    describe '#csv' do
+      let (:export) do
+        stub_didww_request(:get, "/exports/#{id}").to_return(
+          status: 200,
+          body: api_fixture('exports/id/get/without_includes/200'),
+          headers: json_api_headers
+        )
+        client.exports.find(id).first
+      end
+
+      describe 'when file is ready' do
+        before do
+          stub_request(:get, export.url).to_return(
+            status: 200,
+            body: File.binread(File.expand_path('../../fixtures/exports/id/get/csv_download/200.csv.gz', __dir__)),
+            headers: { 'Content-Type' => 'application/octet-stream' }
+          )
+        end
+        it 'does not raise an error' do
+          expect { export.csv }.to_not raise_error
+        end
+        it 'returns a StringIO' do
+          expect(export.csv).to be_kind_of(StringIO)
+        end
+        it 'has csv caption' do
+          expect(export.csv.read).to start_with('Date/Time Start (UTC)')
+        end
+      end
+
+      describe 'when url is empty' do
+        before do
+          export.url = nil
+        end
+        it 'returns nil' do
+          expect(export.csv).to be_nil
+        end
+      end
+    end
+
     context 'when Export does not exist' do
       it 'raises a NotFound error' do
         stub_didww_request(:get, "/exports/#{id}").to_return(

spec/fixtures/exports/get/without_includes/200.json

@@ -7,7 +7,7 @@
         "export_type": "cdr_in",
         "status": "Completed",
         "created_at": "2017-06-25T14:56:31.513Z",
-        "url": "https://sandbox-api.didww.com/v3/exports/a4f6b765-f20c-45c7-98d2-80c2f3a41517.csv"
+        "url": "https://sandbox-api.didww.com/v3/exports/a4f6b765-f20c-45c7-98d2-80c2f3a41517.csv.gz"
       }
     },
     {

spec/fixtures/exports/id/get/without_includes/200.json

@@ -6,7 +6,7 @@
       "export_type": "cdr_in",
       "status": "Completed",
       "created_at": "2017-06-25T14:56:31.513Z",
-      "url": "https://sandbox-api.didww.com/v3/exports/a4f6b765-f20c-45c7-98d2-80c2f3a41517.csv"
+      "url": "https://sandbox-api.didww.com/v3/exports/a4f6b765-f20c-45c7-98d2-80c2f3a41517.csv.gz"
     }
   }
 }