CachedRawResource.cpp [plain text]
#include "config.h"
#include "CachedRawResource.h"
#include "CachedRawResourceClient.h"
#include "CachedResourceClientWalker.h"
#include "CachedResourceLoader.h"
#include "ResourceBuffer.h"
#include "SubresourceLoader.h"
#include <wtf/PassRefPtr.h>
namespace WebCore {
CachedRawResource::CachedRawResource(ResourceRequest& resourceRequest, Type type)
: CachedResource(resourceRequest, type)
, m_identifier(0)
{
}
const char* CachedRawResource::calculateIncrementalDataChunk(ResourceBuffer* data, unsigned& incrementalDataLength)
{
incrementalDataLength = 0;
if (!data)
return 0;
unsigned previousDataLength = encodedSize();
ASSERT(data->size() >= previousDataLength);
incrementalDataLength = data->size() - previousDataLength;
return data->data() + previousDataLength;
}
void CachedRawResource::addDataBuffer(ResourceBuffer* data)
{
CachedResourceHandle<CachedRawResource> protect(this);
ASSERT(m_options.dataBufferingPolicy == BufferData);
m_data = data;
unsigned incrementalDataLength;
const char* incrementalData = calculateIncrementalDataChunk(data, incrementalDataLength);
if (data)
setEncodedSize(data->size());
notifyClientsDataWasReceived(incrementalData, incrementalDataLength);
if (m_options.dataBufferingPolicy == DoNotBufferData) {
if (m_loader)
m_loader->setDataBufferingPolicy(DoNotBufferData);
clear();
}
}
void CachedRawResource::addData(const char* data, unsigned length)
{
ASSERT(m_options.dataBufferingPolicy == DoNotBufferData);
notifyClientsDataWasReceived(data, length);
}
void CachedRawResource::finishLoading(ResourceBuffer* data)
{
CachedResourceHandle<CachedRawResource> protect(this);
DataBufferingPolicy dataBufferingPolicy = m_options.dataBufferingPolicy;
if (dataBufferingPolicy == BufferData) {
m_data = data;
unsigned incrementalDataLength;
const char* incrementalData = calculateIncrementalDataChunk(data, incrementalDataLength);
if (data)
setEncodedSize(data->size());
notifyClientsDataWasReceived(incrementalData, incrementalDataLength);
}
CachedResource::finishLoading(data);
if (dataBufferingPolicy == BufferData && m_options.dataBufferingPolicy == DoNotBufferData) {
if (m_loader)
m_loader->setDataBufferingPolicy(DoNotBufferData);
clear();
}
}
void CachedRawResource::notifyClientsDataWasReceived(const char* data, unsigned length)
{
if (!length)
return;
CachedResourceHandle<CachedRawResource> protect(this);
CachedResourceClientWalker<CachedRawResourceClient> w(m_clients);
while (CachedRawResourceClient* c = w.next())
c->dataReceived(this, data, length);
}
void CachedRawResource::didAddClient(CachedResourceClient* c)
{
if (!hasClient(c))
return;
CachedResourceHandle<CachedRawResource> protect(this);
CachedRawResourceClient* client = static_cast<CachedRawResourceClient*>(c);
size_t redirectCount = m_redirectChain.size();
for (size_t i = 0; i < redirectCount; i++) {
RedirectPair redirect = m_redirectChain[i];
ResourceRequest request(redirect.m_request);
client->redirectReceived(this, request, redirect.m_redirectResponse);
if (!hasClient(c))
return;
}
ASSERT(redirectCount == m_redirectChain.size());
if (!m_response.isNull())
client->responseReceived(this, m_response);
if (!hasClient(c))
return;
if (m_data)
client->dataReceived(this, m_data->data(), m_data->size());
if (!hasClient(c))
return;
CachedResource::didAddClient(client);
}
void CachedRawResource::allClientsRemoved()
{
if (m_loader)
m_loader->cancelIfNotFinishing();
}
void CachedRawResource::willSendRequest(ResourceRequest& request, const ResourceResponse& response)
{
CachedResourceHandle<CachedRawResource> protect(this);
if (!response.isNull()) {
CachedResourceClientWalker<CachedRawResourceClient> w(m_clients);
while (CachedRawResourceClient* c = w.next())
c->redirectReceived(this, request, response);
m_redirectChain.append(RedirectPair(request, response));
}
CachedResource::willSendRequest(request, response);
}
void CachedRawResource::responseReceived(const ResourceResponse& response)
{
CachedResourceHandle<CachedRawResource> protect(this);
if (!m_identifier)
m_identifier = m_loader->identifier();
CachedResource::responseReceived(response);
CachedResourceClientWalker<CachedRawResourceClient> w(m_clients);
while (CachedRawResourceClient* c = w.next())
c->responseReceived(this, m_response);
}
void CachedRawResource::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
CachedResourceClientWalker<CachedRawResourceClient> w(m_clients);
while (CachedRawResourceClient* c = w.next())
c->dataSent(this, bytesSent, totalBytesToBeSent);
}
void CachedRawResource::switchClientsToRevalidatedResource()
{
ASSERT(m_loader);
ASSERT(!m_identifier);
static_cast<CachedRawResource*>(resourceToRevalidate())->m_identifier = m_loader->identifier();
CachedResource::switchClientsToRevalidatedResource();
}
void CachedRawResource::setDefersLoading(bool defers)
{
if (m_loader)
m_loader->setDefersLoading(defers);
}
void CachedRawResource::setDataBufferingPolicy(DataBufferingPolicy dataBufferingPolicy)
{
m_options.dataBufferingPolicy = dataBufferingPolicy;
}
static bool shouldIgnoreHeaderForCacheReuse(AtomicString headerName)
{
DEFINE_STATIC_LOCAL(HashSet<AtomicString>, m_headers, ());
if (m_headers.isEmpty()) {
m_headers.add("Accept");
m_headers.add("Cache-Control");
m_headers.add("If-Modified-Since");
m_headers.add("If-None-Match");
m_headers.add("Origin");
m_headers.add("Pragma");
m_headers.add("Purpose");
m_headers.add("Referer");
m_headers.add("User-Agent");
}
return m_headers.contains(headerName);
}
bool CachedRawResource::canReuse(const ResourceRequest& newRequest) const
{
if (m_options.dataBufferingPolicy == DoNotBufferData)
return false;
if (m_resourceRequest.httpMethod() != newRequest.httpMethod())
return false;
if (m_resourceRequest.httpBody() != newRequest.httpBody())
return false;
if (m_resourceRequest.allowCookies() != newRequest.allowCookies())
return false;
const HTTPHeaderMap& newHeaders = newRequest.httpHeaderFields();
const HTTPHeaderMap& oldHeaders = m_resourceRequest.httpHeaderFields();
HTTPHeaderMap::const_iterator end = newHeaders.end();
for (HTTPHeaderMap::const_iterator i = newHeaders.begin(); i != end; ++i) {
AtomicString headerName = i->key;
if (!shouldIgnoreHeaderForCacheReuse(headerName) && i->value != oldHeaders.get(headerName))
return false;
}
end = oldHeaders.end();
for (HTTPHeaderMap::const_iterator i = oldHeaders.begin(); i != end; ++i) {
AtomicString headerName = i->key;
if (!shouldIgnoreHeaderForCacheReuse(headerName) && i->value != newHeaders.get(headerName))
return false;
}
for (size_t i = 0; i < m_redirectChain.size(); i++) {
if (m_redirectChain[i].m_redirectResponse.cacheControlContainsNoStore())
return false;
}
return true;
}
void CachedRawResource::clear()
{
m_data.clear();
setEncodedSize(0);
if (m_loader)
m_loader->clearResourceData();
}
}