Source/WebCore/Modules/websockets/ThreadableWebSocketChannel.cpp

/*
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 * modification, are permitted provided that the following conditions are
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 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "ThreadableWebSocketChannel.h"

#include "ContentRuleListResults.h"
#include "Document.h"
#include "HTTPHeaderValues.h"
#include "Page.h"
#include "RuntimeEnabledFeatures.h"
#include "ScriptExecutionContext.h"
#include "SocketProvider.h"
#include "ThreadableWebSocketChannelClientWrapper.h"
#include "UserContentProvider.h"
#include "WebSocketChannel.h"
#include "WebSocketChannelClient.h"
#include "WorkerGlobalScope.h"
#include "WorkerRunLoop.h"
#include "WorkerThread.h"
#include "WorkerThreadableWebSocketChannel.h"

namespace WebCore {

Ref<ThreadableWebSocketChannel> ThreadableWebSocketChannel::create(Document& document, WebSocketChannelClient& client, SocketProvider& provider)
{
#if USE(SOUP)
    auto channel = provider.createWebSocketChannel(document, client);
    ASSERT(channel);
    return channel.releaseNonNull();
#else

#if HAVE(NSURLSESSION_WEBSOCKET)
    if (RuntimeEnabledFeatures::sharedFeatures().isNSURLSessionWebSocketEnabled()) {
        if (auto channel = provider.createWebSocketChannel(document, client))
            return channel.releaseNonNull();
    }
#endif

    return WebSocketChannel::create(document, client, provider);
#endif
}

Ref<ThreadableWebSocketChannel> ThreadableWebSocketChannel::create(ScriptExecutionContext& context, WebSocketChannelClient& client, SocketProvider& provider)
{
    if (is<WorkerGlobalScope>(context)) {
        WorkerGlobalScope& workerGlobalScope = downcast<WorkerGlobalScope>(context);
        WorkerRunLoop& runLoop = workerGlobalScope.thread().runLoop();
        return WorkerThreadableWebSocketChannel::create(workerGlobalScope, client, makeString("webSocketChannelMode", runLoop.createUniqueId()), provider);
    }

    return create(downcast<Document>(context), client, provider);
}

Optional<ThreadableWebSocketChannel::ValidatedURL> ThreadableWebSocketChannel::validateURL(Document& document, const URL& requestedURL)
{
    ValidatedURL validatedURL { requestedURL, true };
    if (auto* page = document.page()) {
        if (!page->loadsFromNetwork())
            return { };
#if ENABLE(CONTENT_EXTENSIONS)
        if (auto* documentLoader = document.loader()) {
            auto results = page->userContentProvider().processContentRuleListsForLoad(validatedURL.url, ContentExtensions::ResourceType::Raw, *documentLoader);
            if (results.summary.blockedLoad)
                return { };
            if (results.summary.madeHTTPS) {
                ASSERT(validatedURL.url.protocolIs("ws"));
                validatedURL.url.setProtocol("wss");
            }
            validatedURL.areCookiesAllowed = !results.summary.blockedCookies;
        }
#else
        UNUSED_PARAM(document);
#endif
    }
    return validatedURL;
}

Optional<ResourceRequest> ThreadableWebSocketChannel::webSocketConnectRequest(Document& document, const URL& url)
{
    auto validatedURL = validateURL(document, url);
    if (!validatedURL)
        return { };

    ResourceRequest request { validatedURL->url };
    request.setHTTPUserAgent(document.userAgent(validatedURL->url));
    request.setDomainForCachePartition(document.domainForCachePartition());
    request.setAllowCookies(validatedURL->areCookiesAllowed);
    request.setFirstPartyForCookies(document.firstPartyForCookies());
    request.setHTTPHeaderField(HTTPHeaderName::Origin, document.securityOrigin().toString());

    // Add no-cache headers to avoid compatibility issue.
    // There are some proxies that rewrite "Connection: upgrade"
    // to "Connection: close" in the response if a request doesn't contain
    // these headers.
    request.addHTTPHeaderField(HTTPHeaderName::Pragma, HTTPHeaderValues::noCache());
    request.addHTTPHeaderField(HTTPHeaderName::CacheControl, HTTPHeaderValues::noCache());

    return request;
}

} // namespace WebCore