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//
// SUAppcast.m
// Sparkle
//
// Created by Andy Matuschak on 3/12/06.
// Copyright 2006 Andy Matuschak. All rights reserved.
//
#import "Sparkle.h"
#import "SUAppcast.h"
@interface SUAppcast (Private)
- (void)reportError:(NSError *)error;
- (NSXMLNode *)bestNodeInNodes:(NSArray *)nodes;
@end
@implementation SUAppcast
- (void)dealloc
{
[items release];
[userAgentString release];
[super dealloc];
}
- (NSArray *)items
{
return items;
}
- (void)fetchAppcastFromURL:(NSURL *)url
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30.0];
if (userAgentString)
[request setValue:userAgentString forHTTPHeaderField:@"User-Agent"];
NSURLDownload *download = [[[NSURLDownload alloc] initWithRequest:request delegate:self] autorelease];
CFRetain(download);
}
- (void)download:(NSURLDownload *)download decideDestinationWithSuggestedFilename:(NSString *)filename
{
NSString *destinationFilename = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
[download setDestination:destinationFilename allowOverwrite:NO];
}
- (void)download:(NSURLDownload *)download didCreateDestination:(NSString *)path
{
[downloadFilename release];
downloadFilename = [path copy];
}
- (void)downloadDidFinish:(NSURLDownload *)download
{
CFRelease(download);
NSError *error = nil;
NSXMLDocument *document = [[NSXMLDocument alloc] initWithContentsOfURL:[NSURL fileURLWithPath:downloadFilename] options:0 error:&error];
BOOL failed = NO;
NSArray *xmlItems = nil;
NSMutableArray *appcastItems = [NSMutableArray array];
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
[[NSFileManager defaultManager] removeFileAtPath:downloadFilename handler:nil];
#else
[[NSFileManager defaultManager] removeItemAtPath:downloadFilename error:NULL];
#endif
[downloadFilename release];
downloadFilename = nil;
if (nil == document)
{
failed = YES;
}
else
{
xmlItems = [document nodesForXPath:@"/rss/channel/item" error:&error];
if (nil == xmlItems)
{
failed = YES;
}
}
if (failed == NO)
{
NSEnumerator *nodeEnum = [xmlItems objectEnumerator];
NSXMLNode *node;
NSMutableDictionary *nodesDict = [NSMutableDictionary dictionary];
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
while (failed == NO && (node = [nodeEnum nextObject]))
{
// First, we'll "index" all the first-level children of this appcast item so we can pick them out by language later.
if ([[node children] count])
{
node = [node childAtIndex:0];
while (nil != node)
{
NSString *name = [node name];
if (name)
{
NSMutableArray *nodes = [nodesDict objectForKey:name];
if (nodes == nil)
{
nodes = [NSMutableArray array];
[nodesDict setObject:nodes forKey:name];
}
[nodes addObject:node];
}
node = [node nextSibling];
}
}
NSEnumerator *nameEnum = [nodesDict keyEnumerator];
NSString *name;
while ((name = [nameEnum nextObject]))
{
node = [self bestNodeInNodes:[nodesDict objectForKey:name]];
if ([name isEqualToString:@"enclosure"])
{
// enclosure is flattened as a separate dictionary for some reason
NSEnumerator *attributeEnum = [[(NSXMLElement *)node attributes] objectEnumerator];
NSXMLNode *attribute;
NSMutableDictionary *encDict = [NSMutableDictionary dictionary];
while ((attribute = [attributeEnum nextObject]))
[encDict setObject:[attribute stringValue] forKey:[attribute name]];
[dict setObject:encDict forKey:@"enclosure"];
}
else if ([name isEqualToString:@"pubDate"])
{
// pubDate is expected to be an NSDate by SUAppcastItem, but the RSS class was returning an NSString
NSDate *date = [NSDate dateWithNaturalLanguageString:[node stringValue]];
if (date)
[dict setObject:date forKey:name];
}
else if (name != nil)
{
// add all other values as strings
[dict setObject:[[node stringValue] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] forKey:name];
}
}
SUAppcastItem *anItem = [[SUAppcastItem alloc] initWithDictionary:dict];
if (anItem)
{
[appcastItems addObject:anItem];
[anItem release];
}
else
{
NSLog(@"Sparkle Updater: Failed to parse appcast item with appcast dictionary %@!", dict);
}
[nodesDict removeAllObjects];
[dict removeAllObjects];
}
}
[document release];
if ([appcastItems count])
{
NSSortDescriptor *sort = [[[NSSortDescriptor alloc] initWithKey:@"date" ascending:NO] autorelease];
[appcastItems sortUsingDescriptors:[NSArray arrayWithObject:sort]];
items = [appcastItems copy];
}
if (failed)
{
[self reportError:[NSError errorWithDomain:SUSparkleErrorDomain code:SUAppcastParseError userInfo:[NSDictionary dictionaryWithObjectsAndKeys:SULocalizedString(@"An error occurred while parsing the update feed.", nil), NSLocalizedDescriptionKey, nil]]];
}
else if ([delegate respondsToSelector:@selector(appcastDidFinishLoading:)])
{
[delegate appcastDidFinishLoading:self];
}
}
- (void)download:(NSURLDownload *)download didFailWithError:(NSError *)error
{
CFRelease(download);
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
[[NSFileManager defaultManager] removeFileAtPath:downloadFilename handler:nil];
#else
[[NSFileManager defaultManager] removeItemAtPath:downloadFilename error:NULL];
#endif
[downloadFilename release];
downloadFilename = nil;
[self reportError:error];
}
- (NSURLRequest *)download:(NSURLDownload *)download willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse
{
return request;
}
- (void)reportError:(NSError *)error
{
if ([delegate respondsToSelector:@selector(appcast:failedToLoadWithError:)])
{
[delegate appcast:self failedToLoadWithError:[NSError errorWithDomain:SUSparkleErrorDomain code:SUAppcastError userInfo:[NSDictionary dictionaryWithObjectsAndKeys:SULocalizedString(@"An error occurred in retrieving update information. Please try again later.", nil), NSLocalizedDescriptionKey, [error localizedDescription], NSLocalizedFailureReasonErrorKey, nil]]];
}
}
- (NSXMLNode *)bestNodeInNodes:(NSArray *)nodes
{
// We use this method to pick out the localized version of a node when one's available.
if ([nodes count] == 1)
return [nodes objectAtIndex:0];
else if ([nodes count] == 0)
return nil;
NSEnumerator *nodeEnum = [nodes objectEnumerator];
NSXMLElement *node;
NSMutableArray *languages = [NSMutableArray array];
NSString *lang;
NSInteger i;
while ((node = [nodeEnum nextObject]))
{
lang = [[node attributeForName:@"xml:lang"] stringValue];
[languages addObject:(lang ?: @"")];
}
lang = [[NSBundle preferredLocalizationsFromArray:languages] objectAtIndex:0];
i = [languages indexOfObject:([languages containsObject:lang] ? lang : @"")];
if (i == NSNotFound)
i = 0;
return [nodes objectAtIndex:i];
}
- (void)setUserAgentString:(NSString *)uas
{
if (uas != userAgentString)
{
[userAgentString release];
userAgentString = [uas copy];
}
}
- (void)setDelegate:del
{
delegate = del;
}
@end
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