Backed out changeset a86a27857ef6 (bug 1453318) for causing multiple wpt failures. CLOSED TREE

dom/base/domerr.msg

@@ -126,7 +126,6 @@ DOM4_MSG_DEF(NotSupportedError, "The media resource indicated by the src attribu
 
 DOM4_MSG_DEF(SyntaxError, "The URI is malformed.", NS_ERROR_DOM_MALFORMED_URI)
 DOM4_MSG_DEF(SyntaxError, "Invalid header name.", NS_ERROR_DOM_INVALID_HEADER_NAME)
-DOM4_MSG_DEF(SyntaxError, "Invalid header value.", NS_ERROR_DOM_INVALID_HEADER_VALUE)
 
 /* XMLHttpRequest errors. */
 DOM4_MSG_DEF(InvalidStateError, "XMLHttpRequest has an invalid context.", NS_ERROR_DOM_INVALID_STATE_XHR_HAS_INVALID_CONTEXT)

modules/libpref/init/StaticPrefList.yaml

@@ -12642,12 +12642,6 @@
   value: 5
   mirror: always
 
-  # If true, requests will be canceled if any of the response headers values has a NUL character
-- name: network.http.reject_NULs_in_response_header_values
-  type: RelaxedAtomicBool
-  value: true
-  mirror: always
-
   # If true, remove the resumption token when 0RTT failed.
 - name: network.http.remove_resumption_token_when_early_data_failed
   type: RelaxedAtomicBool

netwerk/protocol/http/nsHttpResponseHead.cpp

@@ -7,7 +7,6 @@
 // HttpLog.h should generally be included first
 #include "HttpLog.h"
 
-#include "mozilla/StaticPrefs_network.h"
 #include "mozilla/Unused.h"
 #include "nsHttpResponseHead.h"
 #include "nsIHttpHeaderVisitor.h"
@@ -595,14 +594,6 @@ nsresult nsHttpResponseHead::ParseHeaderLine_locked(
           line, &hdr, &headerNameOriginal, &val))) {
     return NS_OK;
   }
-
-  // reject the header if there are 0x00 bytes in the value.
-  // (see https://github.com/httpwg/http-core/issues/215 for details).
-  if (StaticPrefs::network_http_reject_NULs_in_response_header_values() &&
-      val.FindChar('\0') >= 0) {
-    return NS_ERROR_DOM_INVALID_HEADER_VALUE;
-  }
-
   nsresult rv;
   if (originalFromNetHeaders) {
     rv = mHeaders.SetHeaderFromNet(hdr, headerNameOriginal, val, true);

testing/web-platform/meta/fetch/h1-parsing/resources-with-0x00-in-header.window.js.ini

@@ -1,5 +1,11 @@
 [resources-with-0x00-in-header.window.html]
   expected:
     if (os == "android") and fission: [OK, TIMEOUT]
+  [Expect network error for image with 0x00 in a header]
+    expected: FAIL
+
   [Expect network error for frame navigation to resource with 0x00 in a header]
     expected: FAIL
+
+  [Expect network error for script with 0x00 in a header]
+    expected: FAIL

testing/web-platform/meta/xhr/headers-normalize-response.htm.ini

@@ -1,3 +1,14 @@
 [headers-normalize-response.htm]
   expected:
     if (os == "android") and fission: [OK, TIMEOUT]
+  [Header value: hello\\0world]
+    expected: FAIL
+
+  [Header value: \\0hello world]
+    expected: FAIL
+
+  [Header value: \\0]
+    expected: FAIL
+
+  [Header value: hello world\\0]
+    expected: FAIL

xpcom/base/ErrorList.py

@@ -752,8 +752,6 @@ with modules["DOM"]:
     # https://html.spec.whatwg.org/multipage/origin.html#cross-origin-opener-policies
     errors["NS_ERROR_DOM_COOP_FAILED"] = FAILURE(1041)
 
-    errors["NS_ERROR_DOM_INVALID_HEADER_VALUE"] = FAILURE(1042)
-
     # May be used to indicate when e.g. setting a property value didn't
     # actually change the value, like for obj.foo = "bar"; obj.foo = "bar";
     # the second assignment throws NS_SUCCESS_DOM_NO_OPERATION.