DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (5216dd412535)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set et cin ts=4 sw=4 sts=4: */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com> (original author)
 *   Christian Biesinger <cbiesinger@web.de>
 *   Daniel Witte <dwitte@mozilla.com>
 *   Jason Duell <jduell.mcbugs@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsHttpChannel_h__
#define nsHttpChannel_h__

#include "HttpBaseChannel.h"

#include "nsHttpTransaction.h"
#include "nsInputStreamPump.h"
#include "nsThreadUtils.h"
#include "nsTArray.h"

#include "nsIHttpEventSink.h"
#include "nsICachingChannel.h"
#include "nsICacheEntryDescriptor.h"
#include "nsICacheListener.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIPrompt.h"
#include "nsIResumableChannel.h"
#include "nsIProtocolProxyCallback.h"
#include "nsICancelable.h"
#include "nsIHttpAuthenticableChannel.h"
#include "nsITraceableChannel.h"
#include "nsIHttpChannelAuthProvider.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsICryptoHash.h"

class nsAHttpConnection;
class AutoRedirectVetoNotifier;

using namespace mozilla::net;

//-----------------------------------------------------------------------------
// nsHttpChannel
//-----------------------------------------------------------------------------

class nsHttpChannel : public HttpBaseChannel
                    , public nsIStreamListener
                    , public nsICachingChannel
                    , public nsICacheListener
                    , public nsITransportEventSink
                    , public nsIProtocolProxyCallback
                    , public nsIHttpAuthenticableChannel
                    , public nsITraceableChannel
                    , public nsIApplicationCacheChannel
                    , public nsIAsyncVerifyRedirectCallback
{
public:
    NS_DECL_ISUPPORTS_INHERITED
    NS_DECL_NSIREQUESTOBSERVER
    NS_DECL_NSISTREAMLISTENER
    NS_DECL_NSICACHEINFOCHANNEL
    NS_DECL_NSICACHINGCHANNEL
    NS_DECL_NSICACHELISTENER
    NS_DECL_NSITRANSPORTEVENTSINK
    NS_DECL_NSIPROTOCOLPROXYCALLBACK
    NS_DECL_NSIPROXIEDCHANNEL
    NS_DECL_NSITRACEABLECHANNEL
    NS_DECL_NSIAPPLICATIONCACHECONTAINER
    NS_DECL_NSIAPPLICATIONCACHECHANNEL
    NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK

    // nsIHttpAuthenticableChannel. We can't use
    // NS_DECL_NSIHTTPAUTHENTICABLECHANNEL because it duplicates cancel() and
    // others.
    NS_IMETHOD GetIsSSL(PRBool *aIsSSL);
    NS_IMETHOD GetProxyMethodIsConnect(PRBool *aProxyMethodIsConnect);
    NS_IMETHOD GetServerResponseHeader(nsACString & aServerResponseHeader);
    NS_IMETHOD GetProxyChallenges(nsACString & aChallenges);
    NS_IMETHOD GetWWWChallenges(nsACString & aChallenges);
    NS_IMETHOD SetProxyCredentials(const nsACString & aCredentials);
    NS_IMETHOD SetWWWCredentials(const nsACString & aCredentials);
    NS_IMETHOD OnAuthAvailable();
    NS_IMETHOD OnAuthCancelled(PRBool userCancel);
    // Functions we implement from nsIHttpAuthenticableChannel but are
    // declared in HttpBaseChannel must be implemented in this class. We
    // just call the HttpBaseChannel:: impls.
    NS_IMETHOD GetLoadFlags(nsLoadFlags *aLoadFlags);
    NS_IMETHOD GetURI(nsIURI **aURI);
    NS_IMETHOD GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks);
    NS_IMETHOD GetLoadGroup(nsILoadGroup **aLoadGroup);
    NS_IMETHOD GetRequestMethod(nsACString& aMethod);

    nsHttpChannel();
    virtual ~nsHttpChannel();

    virtual nsresult Init(nsIURI *aURI, PRUint8 aCaps, nsProxyInfo *aProxyInfo);

    // Methods HttpBaseChannel didn't implement for us or that we override.
    //
    // nsIRequest
    NS_IMETHOD Cancel(nsresult status);
    NS_IMETHOD Suspend();
    NS_IMETHOD Resume();
    // nsIChannel
    NS_IMETHOD GetSecurityInfo(nsISupports **aSecurityInfo);
    NS_IMETHOD AsyncOpen(nsIStreamListener *listener, nsISupports *aContext);
    // nsIHttpChannelInternal
    NS_IMETHOD SetupFallbackChannel(const char *aFallbackKey);
    // nsISupportsPriority
    NS_IMETHOD SetPriority(PRInt32 value);
    // nsIResumableChannel
    NS_IMETHOD ResumeAt(PRUint64 startPos, const nsACString& entityID);

public: /* internal necko use only */ 
    typedef void (nsHttpChannel:: *nsAsyncCallback)(void);

    void InternalSetUploadStream(nsIInputStream *uploadStream) 
      { mUploadStream = uploadStream; }
    void SetUploadStreamHasHeaders(PRBool hasHeaders) 
      { mUploadStreamHasHeaders = hasHeaders; }

    nsresult SetReferrerInternal(nsIURI *referrer) {
        nsCAutoString spec;
        nsresult rv = referrer->GetAsciiSpec(spec);
        if (NS_FAILED(rv)) return rv;
        mReferrer = referrer;
        mRequestHead.SetHeader(nsHttp::Referer, spec);
        return NS_OK;
    }

private:
    typedef nsresult (nsHttpChannel::*nsContinueRedirectionFunc)(nsresult result);

    // AsyncCall may be used to call a member function asynchronously.
    // retval isn't refcounted and is set only when event was successfully
    // posted, the event is returned for the purpose of cancelling when needed
    nsresult AsyncCall(nsAsyncCallback funcPtr,
                       nsRunnableMethod<nsHttpChannel> **retval = nsnull);

    PRBool   RequestIsConditional();
    nsresult Connect(PRBool firstTime = PR_TRUE);
    nsresult AsyncAbort(nsresult status);
    // Send OnStartRequest/OnStopRequest to our listener, if any.
    void     HandleAsyncNotifyListener();
    void     DoNotifyListener();
    nsresult SetupTransaction();
    nsresult CallOnStartRequest();
    nsresult ProcessResponse();
    nsresult ContinueProcessResponse(nsresult);
    nsresult ProcessNormal();
    nsresult ContinueProcessNormal(nsresult);
    nsresult ProcessNotModified();
    nsresult AsyncProcessRedirection(PRUint32 httpStatus);
    nsresult ContinueProcessRedirection(nsresult);
    nsresult ContinueProcessRedirectionAfterFallback(nsresult);
    PRBool   ShouldSSLProxyResponseContinue(PRUint32 httpStatus);
    nsresult ProcessFailedSSLConnect(PRUint32 httpStatus);
    nsresult ProcessFallback(PRBool *waitingForRedirectCallback);
    nsresult ContinueProcessFallback(nsresult);
    PRBool   ResponseWouldVary();

    nsresult ContinueOnStartRequest1(nsresult);
    nsresult ContinueOnStartRequest2(nsresult);
    nsresult ContinueOnStartRequest3(nsresult);

    // redirection specific methods
    void     HandleAsyncRedirect();
    nsresult ContinueHandleAsyncRedirect(nsresult);
    void     HandleAsyncNotModified();
    void     HandleAsyncFallback();
    nsresult ContinueHandleAsyncFallback(nsresult);
    nsresult PromptTempRedirect();
    virtual nsresult SetupReplacementChannel(nsIURI *, nsIChannel *, PRBool preserveMethod);

    // proxy specific methods
    nsresult ProxyFailover();
    nsresult AsyncDoReplaceWithProxy(nsIProxyInfo *);
    nsresult ContinueDoReplaceWithProxy(nsresult);
    void HandleAsyncReplaceWithProxy();
    nsresult ContinueHandleAsyncReplaceWithProxy(nsresult);
    nsresult ResolveProxy();

    // cache specific methods
    nsresult OpenCacheEntry();
    nsresult OnOfflineCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
                                          nsCacheAccessMode aAccess,
                                          nsresult aResult,
                                          PRBool aSync);
    nsresult OpenNormalCacheEntry(PRBool aSync);
    nsresult OnNormalCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
                                         nsCacheAccessMode aAccess,
                                         nsresult aResult,
                                         PRBool aSync);
    nsresult OpenOfflineCacheEntryForWriting();
    nsresult GenerateCacheKey(PRUint32 postID, nsACString &key);
    nsresult UpdateExpirationTime();
    nsresult CheckCache();
    nsresult ShouldUpdateOfflineCacheEntry(PRBool *shouldCacheForOfflineUse);
    nsresult ReadFromCache();
    void     CloseCacheEntry(PRBool doomOnFailure);
    void     CloseOfflineCacheEntry();
    nsresult InitCacheEntry();
    nsresult InitOfflineCacheEntry();
    nsresult AddCacheEntryHeaders(nsICacheEntryDescriptor *entry);
    nsresult StoreAuthorizationMetaData(nsICacheEntryDescriptor *entry);
    nsresult FinalizeCacheEntry();
    nsresult InstallCacheListener(PRUint32 offset = 0);
    nsresult InstallOfflineCacheListener();
    void     MaybeInvalidateCacheEntryForSubsequentGet();
    nsCacheStoragePolicy DetermineStoragePolicy();
    nsresult DetermineCacheAccess(nsCacheAccessMode *_retval);
    void     AsyncOnExamineCachedResponse();

    // Handle the bogus Content-Encoding Apache sometimes sends
    void ClearBogusContentEncodingIfNeeded();

    // byte range request specific methods
    nsresult SetupByteRangeRequest(PRUint32 partialLen);
    nsresult ProcessPartialContent();
    nsresult OnDoneReadingPartialCacheEntry(PRBool *streamDone);

    nsresult DoAuthRetry(nsAHttpConnection *);
    PRBool   MustValidateBasedOnQueryUrl();

    void     HandleAsyncRedirectChannelToHttps();
    nsresult AsyncRedirectChannelToHttps();
    nsresult ContinueAsyncRedirectChannelToHttps(nsresult rv);

    /**
     * A function that takes care of reading STS headers and enforcing STS 
     * load rules.  After a secure channel is erected, STS requires the channel
     * to be trusted or any STS header data on the channel is ignored.
     * This is called from ProcessResponse.
     */
    nsresult ProcessSTSHeader();

    /**
     * Computes and returns a 64 bit encoded string holding a hash of the
     * input buffer. Input buffer must be a null-terminated string.
     */
    nsresult Hash(const char *buf, nsACString &hash);

private:
    nsCOMPtr<nsISupports>             mSecurityInfo;
    nsCOMPtr<nsICancelable>           mProxyRequest;

    nsRefPtr<nsInputStreamPump>       mTransactionPump;
    nsRefPtr<nsHttpTransaction>       mTransaction;

    PRUint64                          mLogicalOffset;

    // cache specific data
    nsCOMPtr<nsICacheEntryDescriptor> mCacheEntry;
    nsRefPtr<nsInputStreamPump>       mCachePump;
    nsAutoPtr<nsHttpResponseHead>     mCachedResponseHead;
    nsCacheAccessMode                 mCacheAccess;
    PRUint32                          mPostID;
    PRUint32                          mRequestTime;

    typedef nsresult (nsHttpChannel:: *nsOnCacheEntryAvailableCallback)(
        nsICacheEntryDescriptor *, nsCacheAccessMode, nsresult, PRBool);
    nsOnCacheEntryAvailableCallback   mOnCacheEntryAvailableCallback;
    PRBool                            mAsyncCacheOpen;

    nsCOMPtr<nsICacheEntryDescriptor> mOfflineCacheEntry;
    nsCacheAccessMode                 mOfflineCacheAccess;
    nsCString                         mOfflineCacheClientID;

    // auth specific data
    nsCOMPtr<nsIHttpChannelAuthProvider> mAuthProvider;

    // Function pointer that can be set to indicate that we got suspended while
    // waiting on an AsyncCall.  When we get resumed we should AsyncCall this
    // function.
    nsAsyncCallback                   mPendingAsyncCallOnResume;

    // Proxy info to replace with
    nsCOMPtr<nsIProxyInfo>            mTargetProxyInfo;

    // Suspend counter.  This is used if someone tries to suspend/resume us
    // before we have either a cache pump or a transaction pump.
    PRUint32                          mSuspendCount;

    // If the channel is associated with a cache, and the URI matched
    // a fallback namespace, this will hold the key for the fallback
    // cache entry.
    nsCString                         mFallbackKey;

    friend class AutoRedirectVetoNotifier;
    nsCOMPtr<nsIURI>                  mRedirectURI;
    nsCOMPtr<nsIChannel>              mRedirectChannel;
    PRUint32                          mRedirectType;

    // state flags
    PRUint32                          mCachedContentIsValid     : 1;
    PRUint32                          mCachedContentIsPartial   : 1;
    PRUint32                          mTransactionReplaced      : 1;
    PRUint32                          mAuthRetryPending         : 1;
    PRUint32                          mResuming                 : 1;
    PRUint32                          mInitedCacheEntry         : 1;
    PRUint32                          mCacheForOfflineUse       : 1;
    // True if mCacheForOfflineUse was set because we were caching
    // opportunistically.
    PRUint32                          mCachingOpportunistically : 1;
    // True if we are loading a fallback cache entry from the
    // application cache.
    PRUint32                          mFallbackChannel          : 1;
    PRUint32                          mTracingEnabled           : 1;
    // True if consumer added its own If-None-Match or If-Modified-Since
    // headers. In such a case we must not override them in the cache code
    // and also we want to pass possible 304 code response through.
    PRUint32                          mCustomConditionalRequest : 1;
    PRUint32                          mFallingBack              : 1;
    PRUint32                          mWaitingForRedirectCallback : 1;
    // True if mRequestTime has been set. In such a case it is safe to update
    // the cache entry's expiration time. Otherwise, it is not(see bug 567360).
    PRUint32                          mRequestTimeInitialized : 1;

    nsTArray<nsContinueRedirectionFunc> mRedirectFuncStack;

    nsCOMPtr<nsICryptoHash>        mHasher;

    nsresult WaitForRedirectCallback();
    void PushRedirectAsyncFunc(nsContinueRedirectionFunc func);
    void PopRedirectAsyncFunc(nsContinueRedirectionFunc func);
};

#endif // nsHttpChannel_h__