1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_BASE_LOAD_STATES_H__ 6 #define NET_BASE_LOAD_STATES_H__ 7 8 namespace net { 9 10 // These states correspond to the lengthy periods of time that a resource load 11 // may be blocked and unable to make progress. 12 enum LoadState { 13 // This is the default state. It corresponds to a resource load that has 14 // either not yet begun or is idle waiting for the consumer to do something 15 // to move things along (e.g., the consumer of an URLRequest may not have 16 // called Read yet). 17 LOAD_STATE_IDLE, 18 19 // This state corresponds to a resource load that is blocked waiting for 20 // access to a resource in the cache. If multiple requests are made for the 21 // same resource, the first request will be responsible for writing (or 22 // updating) the cache entry and the second request will be deferred until 23 // the first completes. This may be done to optimize for cache reuse. 24 LOAD_STATE_WAITING_FOR_CACHE, 25 26 // This state corresponds to a resource load that is blocked waiting for a 27 // proxy autoconfig script to return a proxy server to use. This state may 28 // take a while if the proxy script needs to resolve the IP address of the 29 // host before deciding what proxy to use. 30 LOAD_STATE_RESOLVING_PROXY_FOR_URL, 31 32 // This state corresponds to a resource load that is blocked waiting for a 33 // host name to be resolved. This could either indicate resolution of the 34 // origin server corresponding to the resource or to the host name of a proxy 35 // server used to fetch the resource. 36 LOAD_STATE_RESOLVING_HOST, 37 38 // This state corresponds to a resource load that is blocked waiting for a 39 // TCP connection (or other network connection) to be established. HTTP 40 // requests that reuse a keep-alive connection skip this state. 41 LOAD_STATE_CONNECTING, 42 43 // This state corresponds to a resource load that is blocked waiting to 44 // completely upload a request to a server. In the case of a HTTP POST 45 // request, this state includes the period of time during which the message 46 // body is being uploaded. 47 LOAD_STATE_SENDING_REQUEST, 48 49 // This state corresponds to a resource load that is blocked waiting for the 50 // response to a network request. In the case of a HTTP transaction, this 51 // corresponds to the period after the request is sent and before all of the 52 // response headers have been received. 53 LOAD_STATE_WAITING_FOR_RESPONSE, 54 55 // This state corresponds to a resource load that is blocked waiting for a 56 // read to complete. In the case of a HTTP transaction, this corresponds to 57 // the period after the response headers have been received and before all of 58 // the response body has been downloaded. (NOTE: This state only applies for 59 // an URLRequest while there is an outstanding Read operation.) 60 LOAD_STATE_READING_RESPONSE, 61 }; 62 63 } // namespace net 64 65 #endif // NET_BASE_LOAD_STATES_H__ 66
