Proposal for binary output (#802)

test/Feature/QuerySpec.hs

@@ -608,3 +608,30 @@ spec = do
     it "will embed using a column" $
       get "/ghostBusters?select=escapeId{*}" `shouldRespondWith`
         [json| [{"escapeId":{"so6meIdColumn":1}},{"escapeId":{"so6meIdColumn":3}},{"escapeId":{"so6meIdColumn":5}}] |]
+
+  describe "binary output" $ do
+    it "can query if a single column is selected" $ 
+      request methodGet "/images_base64?select=img&name=eq.A.png" (acceptHdrs "application/octet-stream") ""
+        `shouldRespondWith` ResponseMatcher {
+            matchBody    = Just "iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeAQMAAAAB/jzhAAAABlBMVEUAAAD/AAAb/40iAAAAP0lEQVQI12NgwAbYG2AE/wEYwQMiZB4ACQkQYZEAIgqAhAGIKLCAEQ8kgMT/P1CCEUwc4IMSzA3sUIIdCHECAGSQEkeOTUyCAAAAAElFTkSuQmCC"
+          , matchStatus = 200
+          , matchHeaders = ["Content-Type" <:> "application/octet-stream; charset=utf-8"]
+        }
+
+    it "fails if a single column is not selected" $ do
+      request methodGet "/images?select=img,name&name=eq.A.png" (acceptHdrs "application/octet-stream") ""
+        `shouldRespondWith` 406
+      request methodGet "/images?select=*&name=eq.A.png" (acceptHdrs "application/octet-stream") ""
+        `shouldRespondWith` 406
+      request methodGet "/images?name=eq.A.png" (acceptHdrs "application/octet-stream") ""
+        `shouldRespondWith` 406
+
+    it "concatenates results if more than one row is returned" $ 
+      request methodGet "/images_base64?select=img&name=in.A.png,B.png" (acceptHdrs "application/octet-stream") ""
+        `shouldRespondWith` ResponseMatcher {
+            matchBody    = Just "iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeAQMAAAAB/jzhAAAABlBMVEUAAAD/AAAb/40iAAAAP0lEQVQI12NgwAbYG2AE/wEYwQMiZB4ACQkQYZEAIgqAhAGIKLCAEQ8kgMT/P1CCEUwc4IMSzA3sUIIdCHECAGSQEkeOTUyCAAAAAElFTkSuQmCCiVBORw0KGgoAAAANSUhEUgAAAB4AAAAeAQMAAAAB/jzhAAAABlBMVEX///8AAP94wDzzAAAAL0lEQVQIW2NgwAb+HwARH0DEDyDxwAZEyGAhLODqHmBRzAcn5GAS///A1IF14AAA5/Adbiiz/0gAAAAASUVORK5CYII="
+          , matchStatus = 200
+          , matchHeaders = ["Content-Type" <:> "application/octet-stream; charset=utf-8"]
+        }
+
+

test/fixtures/data.sql

@@ -283,6 +283,10 @@ TRUNCATE TABLE orders CASCADE;
 INSERT INTO orders VALUES (1, 'order 1', 1, 2);
 INSERT INTO orders VALUES (2, 'order 2', 3, 4);
 
+TRUNCATE TABLE images CASCADE;
+INSERT INTO images(name, img) VALUES ('A.png', decode('iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeAQMAAAAB/jzhAAAABlBMVEUAAAD/AAAb/40iAAAAP0lEQVQI12NgwAbYG2AE/wEYwQMiZB4ACQkQYZEAIgqAhAGIKLCAEQ8kgMT/P1CCEUwc4IMSzA3sUIIdCHECAGSQEkeOTUyCAAAAAElFTkSuQmCC', 'base64'));
+INSERT INTO images(name, img) VALUES ('B.png', decode('iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeAQMAAAAB/jzhAAAABlBMVEX///8AAP94wDzzAAAAL0lEQVQIW2NgwAb+HwARH0DEDyDxwAZEyGAhLODqHmBRzAcn5GAS///A1IF14AAA5/Adbiiz/0gAAAAASUVORK5CYII=', 'base64'));
+
 --
 -- PostgreSQL database dump complete
 --

test/fixtures/privileges.sql

@@ -49,6 +49,8 @@ GRANT ALL ON TABLE
     , public.public_orders
     , consumers_view
     , orders_view
+    , images
+    , images_base64
 TO postgrest_test_anonymous;
 
 GRANT INSERT ON TABLE insertonly TO postgrest_test_anonymous;

test/fixtures/schema.sql

@@ -1099,6 +1099,15 @@ CREATE FUNCTION setprojects(id_l int, id_h int, name text) RETURNS SETOF project
     update test.projects set name = $3 WHERE id >= $1 AND id <= $2 returning *;
 $_$;
 
+create table images (
+	name               text not null,
+	img                bytea not null
+);
+
+create view images_base64 as (
+  select name, replace(encode(img, 'base64'), E'\n', '') as img from images
+);
+
 --
 -- PostgreSQL database dump complete
 --