/*
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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 "ZXResultParser.h"
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#import "ZXURIParsedResult.h"
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static NSRegularExpression *ZX_USER_IN_HOST = nil;
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@implementation ZXURIParsedResult
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+ (void)initialize {
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if ([self class] != [ZXURIParsedResult class]) return;
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ZX_USER_IN_HOST = [[NSRegularExpression alloc] initWithPattern:@":/*([^/@]+)@[^/]+" options:0 error:nil];
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}
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- (id)initWithUri:(NSString *)uri title:(NSString *)title {
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if (self = [super initWithType:kParsedResultTypeURI]) {
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_uri = [self massageURI:uri];
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_title = title;
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}
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return self;
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}
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+ (id)uriParsedResultWithUri:(NSString *)uri title:(NSString *)title {
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return [[self alloc] initWithUri:uri title:title];
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}
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- (BOOL)possiblyMaliciousURI {
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return [ZX_USER_IN_HOST numberOfMatchesInString:self.uri options:0 range:NSMakeRange(0, self.uri.length)] > 0;
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}
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- (NSString *)displayResult {
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NSMutableString *result = [NSMutableString stringWithCapacity:30];
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[ZXParsedResult maybeAppend:self.title result:result];
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[ZXParsedResult maybeAppend:self.uri result:result];
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return result;
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}
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/**
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* Transforms a string that represents a URI into something more proper, by adding or canonicalizing
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* the protocol.
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*/
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- (NSString *)massageURI:(NSString *)uri {
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NSString *massagedUri = [uri stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
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NSUInteger protocolEnd = [massagedUri rangeOfString:@":"].location;
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if (protocolEnd == NSNotFound) {
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// No protocol, assume http
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massagedUri = [NSString stringWithFormat:@"http://%@", massagedUri];
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} else if ([self isColonFollowedByPortNumber:massagedUri protocolEnd:(int)protocolEnd]) {
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// Found a colon, but it looks like it is after the host, so the protocol is still missing
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massagedUri = [NSString stringWithFormat:@"http://%@", massagedUri];
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}
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return massagedUri;
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}
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- (BOOL)isColonFollowedByPortNumber:(NSString *)uri protocolEnd:(int)protocolEnd {
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int start = protocolEnd + 1;
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NSUInteger nextSlash = [uri rangeOfString:@"/" options:0 range:NSMakeRange(start, [uri length] - start)].location;
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if (nextSlash == NSNotFound) {
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nextSlash = [uri length];
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}
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return [ZXResultParser isSubstringOfDigits:uri offset:start length:(int)nextSlash - start];
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}
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@end
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