[ServiceWorker] Implement Headers class.

Source/modules/serviceworkers/Headers.cpp

Index: Source/modules/serviceworkers/Headers.cpp
diff --git a/Source/modules/serviceworkers/Headers.cpp b/Source/modules/serviceworkers/Headers.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..52e4a88c4796a9358435dd64edee3cdfb6e2e25a
--- /dev/null
+++ b/Source/modules/serviceworkers/Headers.cpp
@@ -0,0 +1,319 @@
+// 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 "modules/serviceworkers/Headers.h"
+
+#include "bindings/v8/Dictionary.h"
+#include "bindings/v8/ExceptionState.h"
+#include "core/fetch/CrossOriginAccessControl.h"
+#include "core/xml/XMLHttpRequest.h"
+#include "modules/serviceworkers/FetchManager.h"
+#include "modules/serviceworkers/HeadersForEachCallback.h"
+#include "wtf/NotFound.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+PassRefPtr<Headers> Headers::create()
+{
+    return adoptRef(new Headers);
+}
+
+PassRefPtr<Headers> Headers::create(ExceptionState&)
+{
+    return create();
+}
+
+PassRefPtr<Headers> Headers::create(const Headers* input, ExceptionState& exceptionState)
+{
+    // The Headers(init) constructor, when invoked, must run these steps:
+    // 1. Let headers be a new Headers object.
+    RefPtr<Headers> headers = create();
+    // 2. If init is given, fill headers with init. Rethrow any exception.
+    headers->fillWith(input, exceptionState);
+    // 3. Return headers.
+    return headers.release();
+}
+
+PassRefPtr<Headers> Headers::create(const Dictionary& input, ExceptionState& exceptionState)
+{
+    // The Headers(init) constructor, when invoked, must run these steps:
+    // 1. Let headers be a new Headers object.
+    RefPtr<Headers> headers = create();
+    // 2. If init is given, fill headers with init. Rethrow any exception.
+    headers->fillWith(input, exceptionState);
+    // 3. Return headers.
+    return headers.release();
+}
+
+// Called when creating Request.
+PassRefPtr<Headers> Headers::create(FetchHeaderList* headerList)
+{
+    return adoptRef(new Headers(headerList));
+}
+
+Headers::~Headers()
+{
+}
+
+unsigned long Headers::size() const
+{
+    return m_headerList->size();
+}
+
+void Headers::append(const String& name, const String& value, ExceptionState& exceptionState)
+{
+    // To append a name/value (name/value) pair to a Headers object (headers),
+    // run these steps:
+    // 1. If name is not a name or value is not a value, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return;
+    }
+    if (!FetchHeaderList::isValidHeaderValue(value)) {
+        exceptionState.throwTypeError("Invalid value");
+        return;
+    }
+    // 2. If guard is immutable, throw a TypeError.
+    if (m_guard == ImmutableGuard) {
+        exceptionState.throwTypeError("Headers are immutable");
+        return;
+    }
+    // 3. Otherwise, if guard is request and name is a forbidden header name,
+    //    return.
+    if (m_guard == RequestGuard && FetchHeaderList::isForbiddenHeaderName(name))
+        return;
+    // 4. Otherwise, if guard is request-no-CORS and name/value is not a simple
+    //    header, return.
+    if (m_guard == RequestNoCORSGuard && !FetchHeaderList::isSimpleHeader(name, value))
+        return;
+    // 5. Otherwise, if guard is response and name is a forbidden response
+    //    header name, return.
+    if (m_guard == ResponseGuard && FetchHeaderList::isForbiddenResponseHeaderName(name))
+        return;
+    // 6. Append name/value to header list.
+    m_headerList->append(name, value);
+}
+
+void Headers::remove(const String& name, ExceptionState& exceptionState)
+{
+    // The delete(name) method, when invoked, must run these steps:
+    // 1. If name is not a name, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return;
+    }
+    // 2. If guard is immutable, throw a TypeError.
+    if (m_guard == ImmutableGuard) {
+        exceptionState.throwTypeError("Headers are immutable");
+        return;
+    }
+    // 3. Otherwise, if guard is request and name is a forbidden header name,
+    //    return.
+    if (m_guard == RequestGuard && FetchHeaderList::isForbiddenHeaderName(name))
+        return;
+    // 4. Otherwise, if guard is request-no-CORS and name/value is not a simple
+    //    header, return.
+    if (m_guard == RequestNoCORSGuard && !FetchHeaderList::isSimpleHeader(name, "invalid"))
+        return;
+    // 5. Otherwise, if guard is response and name is a forbidden response
+    //    header name, return.
+    if (m_guard == ResponseGuard && FetchHeaderList::isForbiddenResponseHeaderName(name))
+        return;
+    // 6. Remove all headers whose name is name from header list.
+    m_headerList->remove(name);
+}
+
+String Headers::get(const String& name, ExceptionState& exceptionState)
+{
+    // The get(name) method, when invoked, must run these steps:
+    // 1. If name is not a name, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return String();
+    }
+    // 2. Return the value of the first header in header list whose name is
+    //    name, and null otherwise.
+    String result;
+    if (m_headerList->get(name, result))
+        return result;
+    return String();
+}
+
+Vector<String> Headers::getAll(const String& name, ExceptionState& exceptionState)
+{
+    // The getAll(name) method, when invoked, must run these steps:
+    // 1. If name is not a name, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return Vector<String>();
+    }
+    // 2. Return the values of all headers in header list whose name is name, in
+    //    list order, and the empty sequence otherwise.
+    Vector<String> result;
+    m_headerList->getAll(name, result);
+    return result;
+}
+
+bool Headers::has(const String& name, ExceptionState& exceptionState)
+{
+    // The has(name) method, when invoked, must run these steps:
+    // 1. If name is not a name, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return false;
+    }
+    // 2. Return true if there is a header in header list whose name is name,
+    //    and false otherwise.
+    return m_headerList->has(name);
+}
+
+void Headers::set(const String& name, const String& value, ExceptionState& exceptionState)
+{
+    // The set(name, value) method, when invoked, must run these steps:
+    // 1. If name is not a name or value is not a value, throw a TypeError.
+    if (!FetchHeaderList::isValidHeaderName(name)) {
+        exceptionState.throwTypeError("Invalid name");
+        return;
+    }
+    if (!FetchHeaderList::isValidHeaderValue(value)) {
+        exceptionState.throwTypeError("Invalid value");
+        return;
+    }
+    // 2. If guard is immutable, throw a TypeError.
+    if (m_guard == ImmutableGuard) {
+        exceptionState.throwTypeError("Headers are immutable");
+        return;
+    }
+    // 3. Otherwise, if guard is request and name is a forbidden header name,
+    //    return.
+    if (m_guard == RequestGuard && FetchHeaderList::isForbiddenHeaderName(name))
+        return;
+    // 4. Otherwise, if guard is request-no-CORS and name/value is not a simple
+    //    header, return.
+    if (m_guard == RequestNoCORSGuard && !FetchHeaderList::isSimpleHeader(name, value))
+        return;
+    // 5. Otherwise, if guard is response and name is a forbidden response
+    //    header name, return.
+    if (m_guard == ResponseGuard && FetchHeaderList::isForbiddenResponseHeaderName(name))
+        return;
+    // 6. Set name/value in header list.
+    m_headerList->set(name, value);
+}
+
+void Headers::forEach(PassOwnPtr<HeadersForEachCallback> callback, ScriptValue& thisArg)
+{
+    forEachInternal(callback, &thisArg);
+}
+
+void Headers::forEach(PassOwnPtr<HeadersForEachCallback> callback)
+{
+    forEachInternal(callback, 0);
+}
+
+void Headers::clearHeaderList()
+{
+    m_headerList->clearList();
+}
+
+void Headers::fillWith(const Headers* headers, ExceptionState& exceptionState)
+{

[yhirano, 2014/06/26 07:22:13]

Can this method be called when |this| is not empty?
If not, please describe it (if this is a public method) and add an assertion.

[horo, 2014/06/26 08:30:08]

Added 
    ASSERT(m_headerList->size() == 0);

+    // To fill a Headers object (headers) with a given object (object), run
+    // these steps:
+    // 1. If object is a Headers object, copy its header list as headerListCopy
+    //    and then for each header in headerListCopy, retaining order, append
+    //    header's name/header's value to headers. Rethrow any exception.
+    for (size_t i = 0; i < headers->list()->list().size(); ++i) {
+        append(headers->list()->list()[i]->first, headers->list()->list()[i]->second, exceptionState);
+        if (exceptionState.hadException())
+            return;
+    }
+}
+
+void Headers::fillWith(const Dictionary& dictionary, ExceptionState& exceptionState)
+{

[yhirano, 2014/06/26 07:22:13]

ditto

[horo, 2014/06/26 08:30:08]

Done.

+    Vector<String> keys;
+    dictionary.getOwnPropertyNames(keys);
+    if (keys.size() == 0)
+        return;
+
+    // Because of the restrictions in IDL compiler of blink we recieve
+    // sequence<sequence<ByteString>> as a Dictionary, which is a type of union
+    // type of HeadersInit defined in the spec.
+    // http://fetch.spec.whatwg.org/#headers-class
+    // FIXME: Support sequence<sequence<ByteString>>.
+    Vector<String> keyValuePair;
+    if (dictionary.get(keys[0], keyValuePair)) {
+        // 2. Otherwise, if object is a sequence, then for each header in
+        //    object, run these substeps:
+        //   1. If header does not contain two items, throw a TypeError.
+        //   2. Append header's first item/header's second time to headers.
+        //      Rethrow any exception.
+        for (size_t i = 0; i < keys.size(); ++i) {
+            if (i != 0 && !dictionary.get(keys[i], keyValuePair)) {

[yhirano, 2014/06/26 07:22:13]

[optional] I would split these conditions.
 // We've already got the keyValuePair for key[0].
 if (i > 0) {
    if (!get(...)) {
      es.throwTypeError(...);
      return;
    }
 }

[horo, 2014/06/26 08:30:08]

Done.

+                exceptionState.throwTypeError("Invalid value");
+                return;
+            }
+            if (keyValuePair.size() != 2) {

[yhirano, 2014/06/26 07:22:13]

I'm not sure whether the spec says the size must be 2 or the size must be
greater than 1.

[horo, 2014/06/26 08:30:08]

Done.

+                exceptionState.throwTypeError("Invalid value");
+                return;
+            }
+            append(keyValuePair[0], keyValuePair[1], exceptionState);
+            if (exceptionState.hadException())
+                return;
+            keyValuePair.clear();
+        }
+        return;
+    }
+    // 3. Otherwise, if object is an open-ended dictionary, then for each header
+    //    in object, run these substeps:
+    //   1. Set header's key to header's key, converted to ByteString. Rethrow
+    //      any exception.
+    //   2. Append header's key/header's value to headers. Rethrow any
+    //      exception.
+    // FIXME: Support OpenEndedDictionary<ByteString>.
+    for (size_t i = 0; i < keys.size(); ++i) {
+        String value;
+        if (!dictionary.get(keys[i], value)) {
+            exceptionState.throwTypeError("Invalid value");
+            return;
+        }
+        append(keys[i], value, exceptionState);
+        if (exceptionState.hadException())
+            return;
+    }
+}
+
+Headers::Headers()
+    : m_headerList(FetchHeaderList::create())
+    , m_guard(NoneGuard)
+{
+    ScriptWrappable::init(this);
+}
+
+// Called when creating Request or Responce.
+Headers::Headers(FetchHeaderList* headerList)
+    : m_headerList(headerList)
+    , m_guard(NoneGuard)
+{
+    ScriptWrappable::init(this);
+}
+
+void Headers::forEachInternal(PassOwnPtr<HeadersForEachCallback> callback, ScriptValue* thisArg)
+{
+    TrackExceptionState exceptionState;
+    for (size_t i = 0; i < m_headerList->size(); ++i) {
+        if (thisArg)
+            callback->handleItem(*thisArg, m_headerList->list()[i]->first, m_headerList->list()[i]->second, this);
+        else
+            callback->handleItem(m_headerList->list()[i]->first, m_headerList->list()[i]->second, this);
+        if (exceptionState.hadException())
+            break;
+    }
+}
+
+} // namespace WebCore