[ServiceWorker] Implement Headers class.

Source/modules/serviceworkers/FetchHeaderList.cpp

Index: Source/modules/serviceworkers/FetchHeaderList.cpp
diff --git a/Source/modules/serviceworkers/FetchHeaderList.cpp b/Source/modules/serviceworkers/FetchHeaderList.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ec5702314a7a46d484756affbbcaa14f86009d67
--- /dev/null
+++ b/Source/modules/serviceworkers/FetchHeaderList.cpp
@@ -0,0 +1,164 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "FetchHeaderList.h"
+
+#include "core/fetch/CrossOriginAccessControl.h"
+#include "core/xml/XMLHttpRequest.h"
+#include "platform/network/HTTPParsers.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebCore {
+
+PassRefPtr<FetchHeaderList> FetchHeaderList::create()
+{
+    return adoptRef(new FetchHeaderList());
+}
+
+FetchHeaderList::FetchHeaderList()
+{
+}
+
+FetchHeaderList::~FetchHeaderList()
+{
+}
+
+void FetchHeaderList::append(const String& name, const String& value)
+{
+    // "To append a name/value (|name|/|value|) pair to a header list (|list|),
+    // append a new header whose name is |name| and value is |value|, to
+    // |list|."
+    m_headerList.append(adoptPtr(new Header(name, value)));
+}
+
+void FetchHeaderList::set(const String& name, const String& value)
+{
+    // "To set a name/value (|name|/|value|) pair in a header list (|list|), run
+    // these steps:
+    // 1. If there are any headers in |list| whose name is |name|, set the value
+    //    of the first such header to |value| and remove the others.
+    // 2. Otherwise, append a new header whose name is |name| and value is
+    //    |value|, to |list|."
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name) {
+            m_headerList[i]->second = value;
+            for (size_t j = i + 1; j < m_headerList.size(); ) {
+                if (m_headerList[j]->first == name)
+                    m_headerList.remove(j);
+                else
+                    ++j;
+            }
+            return;
+        }
+    }
+    m_headerList.append(adoptPtr(new Header(name, value)));
+}
+
+size_t FetchHeaderList::size() const
+{
+    return m_headerList.size();
+}
+
+void FetchHeaderList::remove(const String& name)
+{
+    for (size_t i = 0; i < m_headerList.size(); ) {
+        if (m_headerList[i]->first == name)
+            m_headerList.remove(i);
+        else
+            ++i;
+    }
+}
+
+bool FetchHeaderList::get(const String& name, String& result) const
+{
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name) {
+            result = m_headerList[i]->second;
+            return true;
+        }
+    }
+    return false;
+}
+
+void FetchHeaderList::getAll(const String& name, Vector<String>& result) const
+{
+    result.clear();
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name)
+            result.append(m_headerList[i]->second);
+    }
+}
+
+bool FetchHeaderList::has(const String& name) const
+{
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name)
+            return true;
+    }
+    return false;
+}
+
+void FetchHeaderList::clearList()
+{
+    m_headerList.clear();
+}
+
+bool FetchHeaderList::isValidHeaderName(const String& name)
+{
+    // FIXME: According to the spec (http://fetch.spec.whatwg.org/) should we
+    // accept all characters in the range 0x00 to 0x7F?
+    return isValidHTTPToken(name);
+}
+
+bool FetchHeaderList::isValidHeaderValue(const String& value)
+{
+    // "A value is a byte sequence that matches the field-value token production
+    // and contains no 0x0A or 0x0D bytes."
+    return (value.find('\r') == kNotFound) && (value.find('\n') == kNotFound);
+}
+
+bool FetchHeaderList::isSimpleHeader(const String& name, const String& value)
+{
+    // "A simple header is a header whose name is either one of `Accept`,
+    // `Accept-Language`, and `Content-Language`, or whose name is
+    // `Content-Type` and value, once parsed, is one of
+    // `application/x-www-form-urlencoded`, `multipart/form-data`, and
+    // `text/plain`."
+    if (equalIgnoringCase(name, "accept")
+        || equalIgnoringCase(name, "accept-language")
+        || equalIgnoringCase(name, "content-language"))
+        return true;
+
+    if (equalIgnoringCase(name, "content-type")) {
+        AtomicString mimeType = extractMIMETypeFromMediaType(AtomicString(value));
+        return equalIgnoringCase(mimeType, "application/x-www-form-urlencoded")
+            || equalIgnoringCase(mimeType, "multipart/form-data")
+            || equalIgnoringCase(mimeType, "text/plain");
+    }
+
+    return false;
+}
+
+bool FetchHeaderList::isForbiddenHeaderName(const String& name)
+{
+    // "A forbidden header name is a header names that is one of:
+    //   `Accept-Charset`, `Accept-Encoding`, `Access-Control-Request-Headers`,
+    //   `Access-Control-Request-Method`, `Connection`,
+    //   `Content-Length, Cookie`, `Cookie2`, `Date`, `DNT`, `Expect`, `Host`,
+    //   `Keep-Alive`, `Origin`, `Referer`, `TE`, `Trailer`,
+    //   `Transfer-Encoding`, `Upgrade`, `User-Agent`, `Via`
+    // or starts with `Proxy-` or `Sec-` (including when it is just `Proxy-` or
+    // `Sec-`)."
+    return !XMLHttpRequest::isAllowedHTTPHeader(name);
+}
+
+bool FetchHeaderList::isForbiddenResponseHeaderName(const String& name)
+{
+    // "A forbidden response header name is a header name that is one of:
+    // `Set-Cookie`, `Set-Cookie2`"
+    return equalIgnoringCase(name, "set-cookie") || equalIgnoringCase(name, "set-cookie2");
+}
+
+} // namespace WebCore