Align FormData CRLF normalization behavior with standards

According to xhr spec[1], no CRLF normalize operation need to be
performed when invoking FormData methods, so all normalization
call is removed in this commit.

But in form sepc[2], when appending data from form controls to
FormData, both name and value should be normalized. New methods
|FormData::AppendFromElement| will perform the normalize operation.

[1] https://xhr.spec.whatwg.org/#dom-formdata-append
[2] https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#append-an-entry

BUG=798030

Change-Id: If90a8e500705013c2935e5290624d4414dd32a72
Reviewed-on: https://chromium-review.googlesource.com/1091238Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566723}

third_party/WebKit/LayoutTests/http/tests/local/formdata/formdata-methods.html

@@ -396,4 +396,78 @@ test(function() {
 
 }, 'FormData - iterators');
 
+test(function() {
+    var gen_different_crlf_keys = function(val) {
+        if (val.indexOf('\r\n') !== -1) {
+            return [val.replace('\r\n', '\r'), val.replace('\r\n', '\n')];
+        } else if (val.indexOf('\r') !== -1) {
+            return [val.replace('\r', '\n'), val.replace('\r', '\r\n')];
+        } else {
+            return [val.replace('\n', '\r'), val.replace('\n', '\r\n')];
+        }
+    }
+
+    var fd = new FormData();
+    fd.set('key\r1', 'value\r1');
+    fd.append('key\n2', 'value\n2');
+    fd.append('key\r\n3', 'value\r\n3');
+
+    var expected_keys = ['key\r1', 'key\n2', 'key\r\n3'];
+    var expected_values = ['value\r1', 'value\n2', 'value\r\n3'];
+
+    for (var i = 0; i < expected_keys.length; ++i) {
+        var expected_key = expected_keys[i];
+        var expected_value = expected_values[i];
+
+        assert_true(fd.has(expected_key),
+                    'has() should return true when tested with expected key');
+        assert_equals(fd.get(expected_key), expected_value,
+                    'get() should return the expected value');
+        var val_arr = fd.getAll(expected_key);
+        assert_true(val_arr.length === 1 && val_arr[0] === expected_value,
+                    'getAll() should return the expected value');
+
+        var wrong_keys = gen_different_crlf_keys(expected_key);
+
+        for (var j = 0; j < wrong_keys.length; ++j) {
+            var wrong_key = wrong_keys[j];
+            assert_false(fd.has(wrong_key),
+                         'has() should return false with keys in other CRLF form');
+            assert_equals(fd.get(wrong_key), null,
+                          'get() should return null with keys in other CRLF form');
+            assert_equals(fd.getAll(wrong_key).length, 0,
+                'getAll() should return empty array with keys in other CRLF form');
+        }
+    }
+
+    var count_keys = function(keys) {
+        var counter = 0;
+        for (var key of keys) {
+            ++counter;
+        }
+        return counter;
+    };
+
+    var fd = new FormData();
+    fd.set('test\rkey', 'value');
+    fd.append('test\nkey', 'value');
+    fd.append('test\r\nkey', 'value');
+
+    assert_equals(count_keys(fd.keys()), 3,
+        'Same key in different CRLF form should be treated as different keys');
+
+    fd.delete('test\rkey');
+    assert_equals(count_keys(fd.keys()), 2,
+                'delete() should only remove same CRLF form key from entries');
+
+    fd.delete('test\nkey');
+    assert_equals(count_keys(fd.keys()), 1,
+                'delete() should only remove same CRLF form key from entries');
+
+    fd.delete('test\r\nkey');
+    assert_equals(count_keys(fd.keys()), 0,
+                'delete() should only remove same CRLF form key from entries');
+
+}, 'FormData - no CRLF normalization');
+
 </script>

third_party/blink/renderer/core/html/forms/base_checkable_input_type.cc

@@ -62,7 +62,7 @@ void BaseCheckableInputType::RestoreFormControlState(
 
 void BaseCheckableInputType::AppendToFormData(FormData& form_data) const {
   if (GetElement().checked())
-    form_data.append(GetElement().GetName(), GetElement().value());
+    form_data.AppendFromElement(GetElement().GetName(), GetElement().value());
 }
 
 void BaseCheckableInputType::HandleKeydownEvent(KeyboardEvent* event) {

third_party/blink/renderer/core/html/forms/file_input_type.cc

@@ -124,12 +124,13 @@ void FileInputType::AppendToFormData(FormData& form_data) const {
   FileList* file_list = GetElement().files();
   unsigned num_files = file_list->length();
   if (num_files == 0) {
-    form_data.append(GetElement().GetName(), File::Create(""));
+    form_data.AppendFromElement(GetElement().GetName(), File::Create(""));
     return;
   }
 
-  for (unsigned i = 0; i < num_files; ++i)
-    form_data.append(GetElement().GetName(), file_list->item(i));
+  for (unsigned i = 0; i < num_files; ++i) {
+    form_data.AppendFromElement(GetElement().GetName(), file_list->item(i));
+  }
 }
 
 bool FileInputType::ValueMissing(const String& value) const {

third_party/blink/renderer/core/html/forms/form_data.cc

@@ -98,7 +98,7 @@ void FormData::Trace(blink::Visitor* visitor) {
 }
 
 void FormData::append(const String& name, const String& value) {
-  entries_.push_back(new Entry(Normalize(name), Normalize(value)));
+  entries_.push_back(new Entry(name, value));
 }
 
 void FormData::append(ScriptState* script_state,
@@ -113,10 +113,9 @@ void FormData::append(ScriptState* script_state,
 }
 
 void FormData::deleteEntry(const String& name) {
-  const String normalized_name = Normalize(name);
   size_t i = 0;
   while (i < entries_.size()) {
-    if (entries_[i]->name() == normalized_name) {
+    if (entries_[i]->name() == name) {
       entries_.EraseAt(i);
     } else {
       ++i;
@@ -125,9 +124,8 @@ void FormData::deleteEntry(const String& name) {
 }
 
 void FormData::get(const String& name, FormDataEntryValue& result) {
-  const String normalized_name = Normalize(name);
   for (const auto& entry : Entries()) {
-    if (entry->name() == normalized_name) {
+    if (entry->name() == name) {
       if (entry->IsString()) {
         result.SetUSVString(entry->Value());
       } else {
@@ -142,9 +140,8 @@ void FormData::get(const String& name, FormDataEntryValue& result) {
 HeapVector<FormDataEntryValue> FormData::getAll(const String& name) {
   HeapVector<FormDataEntryValue> results;
 
-  const String normalized_name = Normalize(name);
   for (const auto& entry : Entries()) {
-    if (entry->name() != normalized_name)
+    if (entry->name() != name)
       continue;
     FormDataEntryValue value;
     if (entry->IsString()) {
@@ -159,29 +156,27 @@ HeapVector<FormDataEntryValue> FormData::getAll(const String& name) {
 }
 
 bool FormData::has(const String& name) {
-  const String normalized_name = Normalize(name);
   for (const auto& entry : Entries()) {
-    if (entry->name() == normalized_name)
+    if (entry->name() == name)
       return true;
   }
   return false;
 }
 
 void FormData::set(const String& name, const String& value) {
-  SetEntry(new Entry(Normalize(name), Normalize(value)));
+  SetEntry(new Entry(name, value));
 }
 
 void FormData::set(const String& name, Blob* blob, const String& filename) {
-  SetEntry(new Entry(Normalize(name), blob, filename));
+  SetEntry(new Entry(name, blob, filename));
 }
 
 void FormData::SetEntry(const Entry* entry) {
   DCHECK(entry);
-  const String normalized_name = entry->name();
   bool found = false;
   size_t i = 0;
   while (i < entries_.size()) {
-    if (entries_[i]->name() != normalized_name) {
+    if (entries_[i]->name() != entry->name()) {
       ++i;
     } else if (found) {
       entries_.EraseAt(i);
@@ -195,12 +190,20 @@ void FormData::SetEntry(const Entry* entry) {
     entries_.push_back(entry);
 }
 
-void FormData::append(const String& name, int value) {
-  append(name, String::Number(value));
+void FormData::append(const String& name, Blob* blob, const String& filename) {
+  entries_.push_back(new Entry(name, blob, filename));
 }
 
-void FormData::append(const String& name, Blob* blob, const String& filename) {
-  entries_.push_back(new Entry(Normalize(name), blob, filename));
+void FormData::AppendFromElement(const String& name, int value) {
+  append(Normalize(name), String::Number(value));
+}
+
+void FormData::AppendFromElement(const String& name, File* file) {
+  entries_.push_back(new Entry(Normalize(name), file, String()));
+}
+
+void FormData::AppendFromElement(const String& name, const String& value) {
+  entries_.push_back(new Entry(Normalize(name), Normalize(value)));
 }
 
 CString FormData::Encode(const String& string) const {

third_party/blink/renderer/core/html/forms/form_data.h

@@ -83,8 +83,10 @@ class CORE_EXPORT FormData final
   class Entry;
   const HeapVector<Member<const Entry>>& Entries() const { return entries_; }
   size_t size() const { return entries_.size(); }
-  void append(const String& name, int value);
   void append(const String& name, Blob*, const String& filename = String());
+  void AppendFromElement(const String& name, int value);
+  void AppendFromElement(const String& name, File* file);
+  void AppendFromElement(const String& name, const String& value);
 
   // This flag is true if this FormData is created with a <form>, and its
   // associated elements contain a non-empty password field.

third_party/blink/renderer/core/html/forms/form_data_test.cc

@@ -8,6 +8,37 @@
 
 namespace blink {
 
+TEST(FormDataTest, append) {
+  FormData* fd = FormData::Create(UTF8Encoding());
+  fd->append("test\n1", "value\n1");
+  fd->append("test\r2", nullptr, "filename");
+
+  const FormData::Entry& entry1 = *fd->Entries()[0];
+  EXPECT_EQ("test\n1", entry1.name());
+  EXPECT_EQ("value\n1", entry1.Value());
+
+  const FormData::Entry& entry2 = *fd->Entries()[1];
+  EXPECT_EQ("test\r2", entry2.name());
+}
+
+TEST(FormDataTest, AppendFromElement) {
+  FormData* fd = FormData::Create(UTF8Encoding());
+  fd->AppendFromElement("Atomic\nNumber", 1);
+  fd->AppendFromElement("Periodic\nTable", nullptr);
+  fd->AppendFromElement("Noble\nGas", "He\rNe\nAr\r\nKr");
+
+  const FormData::Entry& entry1 = *fd->Entries()[0];
+  EXPECT_EQ("Atomic\r\nNumber", entry1.name());
+  EXPECT_EQ("1", entry1.Value());
+
+  const FormData::Entry& entry2 = *fd->Entries()[1];
+  EXPECT_EQ("Periodic\r\nTable", entry2.name());
+
+  const FormData::Entry& entry3 = *fd->Entries()[2];
+  EXPECT_EQ("Noble\r\nGas", entry3.name());
+  EXPECT_EQ("He\r\nNe\r\nAr\r\nKr", entry3.Value());
+}
+
 TEST(FormDataTest, get) {
   FormData* fd = FormData::Create(UTF8Encoding());
   fd->append("name1", "value1");

third_party/blink/renderer/core/html/forms/hidden_input_type.cc

@@ -90,8 +90,8 @@ void HiddenInputType::SetValue(const String& sanitized_value,
 
 void HiddenInputType::AppendToFormData(FormData& form_data) const {
   if (DeprecatedEqualIgnoringCase(GetElement().GetName(), "_charset_")) {
-    form_data.append(GetElement().GetName(),
-                     String(form_data.Encoding().GetName()));
+    form_data.AppendFromElement(GetElement().GetName(),
+                                String(form_data.Encoding().GetName()));
     return;
   }
   InputType::AppendToFormData(form_data);

third_party/blink/renderer/core/html/forms/html_button_element.cc

@@ -172,7 +172,7 @@ void HTMLButtonElement::SetActivatedSubmit(bool flag) {
 
 void HTMLButtonElement::AppendToFormData(FormData& form_data) {
   if (type_ == SUBMIT && !GetName().IsEmpty() && is_activated_submit_)
-    form_data.append(GetName(), Value());
+    form_data.AppendFromElement(GetName(), Value());
 }
 
 void HTMLButtonElement::AccessKeyAction(bool send_mouse_events) {

third_party/blink/renderer/core/html/forms/html_select_element.cc

@@ -1232,7 +1232,7 @@ void HTMLSelectElement::AppendToFormData(FormData& form_data) {
 
   for (auto* const option : GetOptionList()) {
     if (option->Selected() && !option->IsDisabledFormControl())
-      form_data.append(name, option->value());
+      form_data.AppendFromElement(name, option->value());
   }
 }
 

third_party/blink/renderer/core/html/forms/html_text_area_element.cc

@@ -220,11 +220,11 @@ void HTMLTextAreaElement::AppendToFormData(FormData& form_data) {
 
   const String& text =
       (wrap_ == kHardWrap) ? ValueWithHardLineBreaks() : value();
-  form_data.append(GetName(), text);
+  form_data.AppendFromElement(GetName(), text);
 
   const AtomicString& dirname_attr_value = FastGetAttribute(dirnameAttr);
   if (!dirname_attr_value.IsNull())
-    form_data.append(dirname_attr_value, DirectionForFormData());
+    form_data.AppendFromElement(dirname_attr_value, DirectionForFormData());
 }
 
 void HTMLTextAreaElement::ResetImpl() {

third_party/blink/renderer/core/html/forms/image_input_type.cc

@@ -62,15 +62,15 @@ void ImageInputType::AppendToFormData(FormData& form_data) const {
     return;
   const AtomicString& name = GetElement().GetName();
   if (name.IsEmpty()) {
-    form_data.append("x", click_location_.X());
-    form_data.append("y", click_location_.Y());
+    form_data.AppendFromElement("x", click_location_.X());
+    form_data.AppendFromElement("y", click_location_.Y());
     return;
   }
 
   DEFINE_STATIC_LOCAL(String, dot_x_string, (".x"));
   DEFINE_STATIC_LOCAL(String, dot_y_string, (".y"));
-  form_data.append(name + dot_x_string, click_location_.X());
-  form_data.append(name + dot_y_string, click_location_.Y());
+  form_data.AppendFromElement(name + dot_x_string, click_location_.X());
+  form_data.AppendFromElement(name + dot_y_string, click_location_.Y());
 }
 
 String ImageInputType::ResultForDialogSubmit() const {

third_party/blink/renderer/core/html/forms/input_type.cc

@@ -158,7 +158,7 @@ bool InputType::IsFormDataAppendable() const {
 }
 
 void InputType::AppendToFormData(FormData& form_data) const {
-  form_data.append(GetElement().GetName(), GetElement().value());
+  form_data.AppendFromElement(GetElement().GetName(), GetElement().value());
 }
 
 String InputType::ResultForDialogSubmit() const {

third_party/blink/renderer/core/html/forms/submit_input_type.cc

@@ -51,9 +51,10 @@ const AtomicString& SubmitInputType::FormControlType() const {
 }
 
 void SubmitInputType::AppendToFormData(FormData& form_data) const {
-  if (GetElement().IsActivatedSubmit())
-    form_data.append(GetElement().GetName(),
-                     GetElement().ValueOrDefaultLabel());
+  if (GetElement().IsActivatedSubmit()) {
+    form_data.AppendFromElement(GetElement().GetName(),
+                                GetElement().ValueOrDefaultLabel());
+  }
 }
 
 bool SubmitInputType::SupportsRequired() const {

third_party/blink/renderer/core/html/forms/text_field_input_type.cc

@@ -494,8 +494,10 @@ void TextFieldInputType::AppendToFormData(FormData& form_data) const {
   InputType::AppendToFormData(form_data);
   const AtomicString& dirname_attr_value =
       GetElement().FastGetAttribute(dirnameAttr);
-  if (!dirname_attr_value.IsNull())
-    form_data.append(dirname_attr_value, GetElement().DirectionForFormData());
+  if (!dirname_attr_value.IsNull()) {
+    form_data.AppendFromElement(dirname_attr_value,
+                                GetElement().DirectionForFormData());
+  }
 }
 
 String TextFieldInputType::ConvertFromVisibleValue(