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- // Copyright (c) 2011 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.
- // This file intentionally does not have header guards, it's included
- // inside a macro to generate values. The following line silences a
- // presubmit warning that would otherwise be triggered by this:
- // no-include-guard-because-multiply-included
- // NOLINT(build/header_guard)
- // This is the list of load flags and their values. For the enum values,
- // include the file "net/base/load_flags.h".
- //
- // Here we define the values using a macro LOAD_FLAG, so it can be
- // expanded differently in some places (for example, to automatically
- // map a load flag value to its symbolic name).
- LOAD_FLAG(NORMAL, 0)
- // This is "normal reload", meaning an if-none-match/if-modified-since query.
- // All other caches are used as normal.
- LOAD_FLAG(VALIDATE_CACHE, 1 << 0)
- // This is "shift-reload", meaning a "pragma: no-cache" end-to-end fetch. All
- // other caches are used as normal.
- LOAD_FLAG(BYPASS_CACHE, 1 << 1)
- // This is a back/forward style navigation where the cached content should
- // be preferred over any protocol specific cache validation.
- LOAD_FLAG(SKIP_CACHE_VALIDATION, 1 << 2)
- // This is a navigation that will fail if it cannot serve the requested
- // resource from the cache (or some equivalent local store).
- LOAD_FLAG(ONLY_FROM_CACHE, 1 << 3)
- // This is a navigation that will not use the cache at all. It does not
- // impact the HTTP request headers. All other caches are used as normal.
- LOAD_FLAG(DISABLE_CACHE, 1 << 4)
- // If present, causes dependent network fetches (AIA, CRLs, OCSP) to be
- // skipped on secure connections.
- LOAD_FLAG(DISABLE_CERT_NETWORK_FETCHES, 1 << 5)
- // This load will not make any changes to cookies, including storing new
- // cookies or updating existing ones.
- // Deprecated. Use URLRequest::set_allow_credentials instead. See
- // https://crbug.com/799935.
- LOAD_FLAG(DO_NOT_SAVE_COOKIES, 1 << 6)
- // Do not resolve proxies. This override is used when downloading PAC files
- // to avoid having a circular dependency.
- LOAD_FLAG(BYPASS_PROXY, 1 << 7)
- // DO NOT USE THIS FLAG
- // The network stack should not have frame level knowledge. Any pre-connect
- // or pre-resolution requiring that knowledge should be done from the
- // stack embedder.
- // Indicate that this is a top level frame, so that we don't assume it is a
- // subresource and speculatively pre-connect or pre-resolve when a referring
- // page is loaded.
- LOAD_FLAG(MAIN_FRAME_DEPRECATED, 1 << 8)
- // Indicates that this load was motivated by the rel=prefetch feature,
- // and is (in theory) not intended for the current frame.
- LOAD_FLAG(PREFETCH, 1 << 9)
- // Indicates that this load could cause deadlock if it has to wait for another
- // request. Overrides socket limits. Must always be used with MAXIMUM_PRIORITY.
- LOAD_FLAG(IGNORE_LIMITS, 1 << 10)
- // Indicates that the username:password portion of the URL should not
- // be honored, but that other forms of authority may be used.
- LOAD_FLAG(DO_NOT_USE_EMBEDDED_IDENTITY, 1 << 11)
- // Indicates that this request is not to be migrated to a cellular network when
- // QUIC connection migration is enabled.
- LOAD_FLAG(DISABLE_CONNECTION_MIGRATION_TO_CELLULAR, 1 << 12)
- // Indicates that the cache should not check that the request matches the
- // response's vary header.
- LOAD_FLAG(SKIP_VARY_CHECK, 1 << 13)
- // The creator of this URLRequest wishes to receive stale responses when allowed
- // by the "Cache-Control: stale-while-revalidate" directive and is able to issue
- // an async revalidation to update the cache. If the callee needs to revalidate
- // the resource |async_revalidation_requested| attribute will be set on the
- // associated HttpResponseInfo. If indicated the callee should revalidate the
- // resource by issuing a new request without this flag set. If the revalidation
- // does not complete in 60 seconds, the cache treat the stale resource as
- // invalid, as it did not specify stale-while-revalidate.
- LOAD_FLAG(SUPPORT_ASYNC_REVALIDATION, 1 << 14)
- // Indicates that a prefetch request's cached response should be restricted in
- // in terms of reuse. The cached response can only be reused by requests with
- // the LOAD_CAN_USE_RESTRICTED_PREFETCH load flag.
- LOAD_FLAG(RESTRICTED_PREFETCH, 1 << 15)
- // This flag must be set on requests that are allowed to reuse cache entries
- // that are marked as RESTRICTED_PREFETCH. Requests without this flag cannot
- // reuse restricted prefetch responses in the cache. Restricted response reuse
- // is considered privileged, and therefore this flag must only be set from a
- // trusted process.
- LOAD_FLAG(CAN_USE_RESTRICTED_PREFETCH, 1 << 16)
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