Bug 1567549 - Removes incorrect empty field-value filter r=geckoview-reviewers,snorp

Removes incorrect empty field-value filter

Differential Revision: https://phabricator.services.mozilla.com/D45569

--HG--
extra : moz-landing-system : lando

mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/NavigationDelegateTest.kt

@@ -1223,15 +1223,30 @@ class NavigationDelegateTest : BaseSessionTest() {
                 .getString("Header2"), equalTo("Value1, Value2"))
     }
 
+    @Ignore("HttpBin incorrectly filters empty field values")
+    @Test fun loadUriHeaderEmptyFieldValue() {
+        val headers = mapOf<String?, String?>(
+                "ValueLess1" to "",
+                "ValueLess2" to null)
+
+        sessionRule.session.loadUri("$TEST_ENDPOINT/anything", headers)
+        sessionRule.session.waitForPageStop()
+
+        val content = sessionRule.session.evaluateJS("document.body.children[0].innerHTML") as String
+        val body = JSONObject(content)
+        val headersJSON = body.getJSONObject("headers")
+
+        MatcherAssert.assertThat("Header with no field value should be included",
+                headersJSON.has("ValueLess1"))
+        MatcherAssert.assertThat("Header with no field value should be included",
+                headersJSON.has("ValueLess2"))
+    }
+
     @Test fun loadUriHeaderBadOverrides() {
         val headers = mapOf<String?, String?>(
                 null to "BadNull",
                 "Connection" to "BadConnection",
-                "Host" to "BadHost",
+                "Host" to "BadHost")
-                "ValueLess1" to "",
-                "ValueLess2" to null,
-                "ValueLess3" to " ",
-                "ValueLess4" to "\t")
 
         sessionRule.session.loadUri("$TEST_ENDPOINT/anything", headers)
         sessionRule.session.waitForPageStop()
@@ -1254,16 +1269,6 @@ class NavigationDelegateTest : BaseSessionTest() {
         MatcherAssert.assertThat("Headers should not match", headersJSON
                 .getString("Host"), not("BadHost"))
 
-        // As per RFC7230 all request headers must have a field value (Except Host, which we filter)
-        // RFC7230 makes RFC2616 obsolete but 2616 allowed empty field values.
-        MatcherAssert.assertThat("Header with no field value should not be included",
-                !headersJSON.has("ValueLess1"))
-        MatcherAssert.assertThat("Header with no field value should not be included",
-                !headersJSON.has("ValueLess2"))
-        MatcherAssert.assertThat("Header with no field value should not be included",
-                !headersJSON.has("ValueLess3"))
-        MatcherAssert.assertThat("Header with no field value should not be included",
-                !headersJSON.has("ValueLess4"))
     }
 
     @Test(expected = GeckoResult.UncaughtException::class)

mobile/android/geckoview/src/main/java/org/mozilla/geckoview/GeckoSession.java

@@ -1628,13 +1628,8 @@ public class GeckoSession implements Parcelable {
             if (key == null)
                 continue;
 
-            String value = additionalHeaders.get(key);
-
-            // As per RFC7230 headers must contain a field value
-            if (value != null && !value.equals("")) {
             headers.add( String.format("%s:%s", key, additionalHeaders.get(key)) );
         }
-        }
         return headers;
     }