third_party/WebKit/Source/core/workers/AbstractWorker.cpp

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "core/workers/AbstractWorker.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/ExecutionContext.h"
#include "core/frame/csp/ContentSecurityPolicy.h"
#include "platform/weborigin/SecurityOrigin.h"

namespace blink {

AbstractWorker::AbstractWorker(ExecutionContext* context)
    : ContextLifecycleObserver(context) {}

AbstractWorker::~AbstractWorker() {}

// static
KURL AbstractWorker::ResolveURL(ExecutionContext* execution_context,
                                const String& url,
                                ExceptionState& exception_state,
                                WebURLRequest::RequestContext request_context) {
  KURL script_url = execution_context->CompleteURL(url);
  if (!script_url.IsValid()) {
    exception_state.ThrowDOMException(kSyntaxError,
                                      "'" + url + "' is not a valid URL.");
    return KURL();
  }

  // We can safely expose the URL in the following exceptions, as these checks
  // happen synchronously before redirection. JavaScript receives no new
  // information.
  if (!script_url.ProtocolIsData() &&
      !execution_context->GetSecurityOrigin()->CanRequestNoSuborigin(
          script_url)) {
    exception_state.ThrowSecurityError(
        "Script at '" + script_url.ElidedString() +
        "' cannot be accessed from origin '" +
        execution_context->GetSecurityOrigin()->ToString() + "'.");
    return KURL();
  }

  if (ContentSecurityPolicy* csp =
          execution_context->GetContentSecurityPolicy()) {
    if (!csp->AllowRequestWithoutIntegrity(request_context, script_url) ||
        !csp->AllowWorkerContextFromSource(script_url)) {
      exception_state.ThrowSecurityError(
          "Access to the script at '" + script_url.ElidedString() +
          "' is denied by the document's Content Security Policy.");
      return KURL();
    }
  }

  return script_url;
}

DEFINE_TRACE(AbstractWorker) {
  EventTargetWithInlineData::Trace(visitor);
  ContextLifecycleObserver::Trace(visitor);
}

}  // namespace blink