/*
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* Copyright 2012 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "ZXURIResultParser.h"
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#import "ZXResult.h"
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#import "ZXURIParsedResult.h"
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static NSRegularExpression *ZX_URL_WITH_PROTOCOL_PATTERN = nil;
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static NSRegularExpression *ZX_URL_WITHOUT_PROTOCOL_PATTERN = nil;
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@implementation ZXURIResultParser
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+ (void)initialize {
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if ([self class] != [ZXURIResultParser class]) return;
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// See http://www.ietf.org/rfc/rfc2396.txt
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ZX_URL_WITH_PROTOCOL_PATTERN = [[NSRegularExpression alloc] initWithPattern:@"^[a-zA-Z][a-zA-Z0-9+-.]+:"
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options:0
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error:nil];
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ZX_URL_WITHOUT_PROTOCOL_PATTERN = [[NSRegularExpression alloc] initWithPattern:
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[[@"([a-zA-Z0-9\\-]+\\.)+[a-zA-Z]{2,}" // host name elements
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stringByAppendingString:@"(:\\d{1,5})?"] // maybe port
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stringByAppendingString:@"(/|\\?|$)"] // query, path or nothing
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options:0
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error:nil];
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}
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- (ZXParsedResult *)parse:(ZXResult *)result {
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NSString *rawText = [ZXResultParser massagedText:result];
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// We specifically handle the odd "URL" scheme here for simplicity and add "URI" for fun
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// Assume anything starting this way really means to be a URI
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if ([rawText hasPrefix:@"URL:"] || [rawText hasPrefix:@"URI:"]) {
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return [[ZXURIParsedResult alloc] initWithUri:[[rawText substringFromIndex:4] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]
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title:nil];
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}
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rawText = [rawText stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
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return [[self class] isBasicallyValidURI:rawText] ? [ZXURIParsedResult uriParsedResultWithUri:rawText title:nil] : nil;
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}
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+ (BOOL)isBasicallyValidURI:(NSString *)uri {
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if ([uri rangeOfString:@" "].location != NSNotFound) {
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// Quick hack check for a common case
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return NO;
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}
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if ([ZX_URL_WITH_PROTOCOL_PATTERN numberOfMatchesInString:uri options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(0, uri.length)] > 0) { // match at start only
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return YES;
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}
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return [ZX_URL_WITHOUT_PROTOCOL_PATTERN numberOfMatchesInString:uri options:NSMatchingWithoutAnchoringBounds range:NSMakeRange(0, uri.length)] > 0;
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}
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@end
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