115 lines
3.9 KiB
Objective-C
115 lines
3.9 KiB
Objective-C
//
|
|
// MIT License (MIT)
|
|
//
|
|
// Copyright (c) 2016 Brent Simmons
|
|
// Copyright (c) 2018 Oleg Geier
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
// this software and associated documentation files (the "Software"), to deal in
|
|
// the Software without restriction, including without limitation the rights to
|
|
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
// of the Software, and to permit persons to whom the Software is furnished to do
|
|
// so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
|
|
#import <libxml/xmlstring.h>
|
|
|
|
#import "RSHTMLMetadataParser.h"
|
|
#import "RSHTMLMetadata.h"
|
|
#import "NSString+RSXML.h"
|
|
#import "NSDictionary+RSXML.h"
|
|
|
|
@interface RSHTMLMetadataParser()
|
|
@property (nonatomic, readonly) NSURL *baseURL;
|
|
@property (nonatomic) NSString *faviconLink;
|
|
@property (nonatomic) NSMutableArray<RSHTMLMetadataIconLink*> *iconLinks;
|
|
@property (nonatomic) NSMutableArray<RSHTMLMetadataFeedLink*> *feedLinks;
|
|
@end
|
|
|
|
@implementation RSHTMLMetadataParser
|
|
|
|
#pragma mark - RSXMLParserDelegate
|
|
|
|
+ (BOOL)isHTMLParser { return YES; }
|
|
|
|
- (BOOL)xmlParserWillStartParsing {
|
|
_baseURL = [NSURL URLWithString:self.documentURI];
|
|
_iconLinks = [NSMutableArray new];
|
|
_feedLinks = [NSMutableArray new];
|
|
return YES;
|
|
}
|
|
|
|
- (id)xmlParserWillReturnDocument {
|
|
RSHTMLMetadata *metadata = [[RSHTMLMetadata alloc] init];
|
|
metadata.faviconLink = self.faviconLink;
|
|
metadata.feedLinks = [self.feedLinks copy];
|
|
metadata.iconLinks = [self.iconLinks copy];
|
|
return metadata;
|
|
}
|
|
|
|
|
|
#pragma mark - RSSAXParserDelegate
|
|
|
|
|
|
- (void)saxParser:(RSSAXParser *)SAXParser XMLStartElement:(const xmlChar *)localName attributes:(const xmlChar **)attributes {
|
|
|
|
if (xmlStrlen(localName) != 4) {
|
|
return;
|
|
}
|
|
else if (EqualBytes(localName, "body", 4)) {
|
|
[SAXParser cancel]; // we're only interested in head
|
|
}
|
|
else if (EqualBytes(localName, "link", 4)) {
|
|
[self parseLinkItemWithAttributes:[SAXParser attributesDictionaryHTML:attributes]];
|
|
}
|
|
}
|
|
|
|
- (void)parseLinkItemWithAttributes:(NSDictionary*)attribs {
|
|
if (!attribs || attribs.count == 0)
|
|
return;
|
|
NSString *rel = [attribs rsxml_objectForCaseInsensitiveKey:@"rel"];
|
|
if (!rel || rel.length == 0)
|
|
return;
|
|
NSString *link = [attribs rsxml_objectForCaseInsensitiveKey:@"href"];
|
|
if (!link) {
|
|
link = [attribs rsxml_objectForCaseInsensitiveKey:@"src"];
|
|
if (!link)
|
|
return;
|
|
}
|
|
|
|
rel = [rel lowercaseString];
|
|
|
|
if ([rel isEqualToString:@"shortcut icon"]) {
|
|
self.faviconLink = [link absoluteURLWithBase:self.baseURL];
|
|
}
|
|
else if ([rel isEqualToString:@"icon"] || [rel hasPrefix:@"apple-touch-icon"]) { // also matching "apple-touch-icon-precomposed"
|
|
RSHTMLMetadataIconLink *icon = [RSHTMLMetadataIconLink new];
|
|
icon.link = [link absoluteURLWithBase:self.baseURL];
|
|
icon.title = rel;
|
|
icon.sizes = [attribs rsxml_objectForCaseInsensitiveKey:@"sizes"];
|
|
[self.iconLinks addObject:icon];
|
|
}
|
|
else if ([rel isEqualToString:@"alternate"]) {
|
|
RSFeedType type = RSFeedTypeFromLinkTypeAttribute([attribs rsxml_objectForCaseInsensitiveKey:@"type"]);
|
|
if (type != RSFeedTypeNone) {
|
|
RSHTMLMetadataFeedLink *feedLink = [RSHTMLMetadataFeedLink new];
|
|
feedLink.link = [link absoluteURLWithBase:self.baseURL];
|
|
feedLink.title = [attribs rsxml_objectForCaseInsensitiveKey:@"title"];
|
|
feedLink.type = type;
|
|
[self.feedLinks addObject:feedLink];
|
|
}
|
|
}
|
|
}
|
|
|
|
@end
|