Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

executable file 188 lines (150 sloc) 6.512 kb
/* Copyright (c) 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// GTMHTTPFetchHistory.h
//
//
// Users of the GTMHTTPFetcher class may optionally create and set a fetch
// history object. The fetch history provides "memory" between subsequent
// fetches, including:
//
// - For fetch responses with Etag headers, the fetch history
// remembers the response headers. Future fetcher requests to the same URL
// will be given an "If-None-Match" header, telling the server to return
// a 304 Not Modified status if the response is unchanged, reducing the
// server load and network traffic.
//
// - Optionally, the fetch history can cache the ETagged data that was returned
// in the responses that contained Etag headers. If a later fetch
// results in a 304 status, the fetcher will return the cached ETagged data
// to the client along with a 200 status, hiding the 304.
//
// - The fetch history can track cookies.
//
#pragma once
#import <Foundation/Foundation.h>
#import "GTMHTTPFetcher.h"
#undef _EXTERN
#undef _INITIALIZE_AS
#ifdef GTMHTTPFETCHHISTORY_DEFINE_GLOBALS
#define _EXTERN
#define _INITIALIZE_AS(x) =x
#else
#if defined(__cplusplus)
#define _EXTERN extern "C"
#else
#define _EXTERN extern
#endif
#define _INITIALIZE_AS(x)
#endif
// default data cache size for when we're caching responses to handle "not
// modified" errors for the client
#if GTM_IPHONE
// iPhone: up to 1MB memory
_EXTERN const NSUInteger kGTMDefaultETaggedDataCacheMemoryCapacity _INITIALIZE_AS(1*1024*1024);
#else
// Mac OS X: up to 15MB memory
_EXTERN const NSUInteger kGTMDefaultETaggedDataCacheMemoryCapacity _INITIALIZE_AS(15*1024*1024);
#endif
// forward declarations
@class GTMURLCache;
@class GTMCookieStorage;
@interface GTMHTTPFetchHistory : NSObject <GTMHTTPFetchHistoryProtocol> {
@private
GTMURLCache *etaggedDataCache_;
BOOL shouldRememberETags_;
BOOL shouldCacheETaggedData_; // if NO, then only headers are cached
GTMCookieStorage *cookieStorage_;
}
// With caching enabled, previously-cached data will be returned instead of
// 304 Not Modified responses when repeating a fetch of an URL that previously
// included an ETag header in its response
@property (assign) BOOL shouldRememberETags; // default: NO
@property (assign) BOOL shouldCacheETaggedData; // default: NO
// the default ETag data cache capacity is kGTMDefaultETaggedDataCacheMemoryCapacity
@property (assign) NSUInteger memoryCapacity;
@property (retain) GTMCookieStorage *cookieStorage;
- (id)initWithMemoryCapacity:(NSUInteger)totalBytes
shouldCacheETaggedData:(BOOL)shouldCacheETaggedData;
- (void)updateRequest:(NSMutableURLRequest *)request isHTTPGet:(BOOL)isHTTPGet;
- (void)clearETaggedDataCache;
- (void)clearHistory;
- (void)removeAllCookies;
@end
// GTMURLCache and GTMCachedURLResponse have interfaces similar to their
// NSURLCache counterparts, in hopes that someday the NSURLCache versions
// can be used. But in 10.5.8, those are not reliable enough except when
// used with +setSharedURLCache. Our goal here is just to cache
// responses for handling If-None-Match requests that return
// "Not Modified" responses, not for replacing the general URL
// caches.
@interface GTMCachedURLResponse : NSObject {
@private
NSURLResponse *response_;
NSData *data_;
NSDate *useDate_; // date this response was last saved or used
NSDate *reservationDate_; // date this response's ETag was used
}
@property (readonly) NSURLResponse* response;
@property (readonly) NSData* data;
// date the response was saved or last accessed
@property (retain) NSDate *useDate;
// date the response's ETag header was last used for a fetch request
@property (retain) NSDate *reservationDate;
- (id)initWithResponse:(NSURLResponse *)response data:(NSData *)data;
@end
@interface GTMURLCache : NSObject {
NSMutableDictionary *responses_; // maps request URL to GTMCachedURLResponse
NSUInteger memoryCapacity_; // capacity of NSDatas in the responses
NSUInteger totalDataSize_; // sum of sizes of NSDatas of all responses
NSTimeInterval reservationInterval_; // reservation expiration interval
}
@property (assign) NSUInteger memoryCapacity;
- (id)initWithMemoryCapacity:(NSUInteger)totalBytes;
- (GTMCachedURLResponse *)cachedResponseForRequest:(NSURLRequest *)request;
- (void)storeCachedResponse:(GTMCachedURLResponse *)cachedResponse forRequest:(NSURLRequest *)request;
- (void)removeCachedResponseForRequest:(NSURLRequest *)request;
- (void)removeAllCachedResponses;
// for unit testing
- (void)setReservationInterval:(NSTimeInterval)secs;
- (NSDictionary *)responses;
- (NSUInteger)totalDataSize;
@end
@interface GTMCookieStorage : NSObject <GTMCookieStorageProtocol> {
@private
// The cookie storage object manages an array holding cookies, but the array
// is allocated externally (it may be in a fetcher object or the static
// fetcher cookie array.) See the fetcher's setCookieStorageMethod:
// for allocation of this object and assignment of its cookies array.
NSMutableArray *cookies_;
}
// add all NSHTTPCookies in the supplied array to the storage array,
// replacing cookies in the storage array as appropriate
// Side effect: removes expired cookies from the storage array
- (void)setCookies:(NSArray *)newCookies;
// retrieve all cookies appropriate for the given URL, considering
// domain, path, cookie name, expiration, security setting.
// Side effect: removes expired cookies from the storage array
- (NSArray *)cookiesForURL:(NSURL *)theURL;
// return a cookie with the same name, domain, and path as the
// given cookie, or else return nil if none found
//
// Both the cookie being tested and all stored cookies should
// be valid (non-nil name, domains, paths)
- (NSHTTPCookie *)cookieMatchingCookie:(NSHTTPCookie *)cookie;
// remove any expired cookies, excluding cookies with nil expirations
- (void)removeExpiredCookies;
- (void)removeAllCookies;
@end
Jump to Line
Something went wrong with that request. Please try again.