Percent Encoding Url Components
Subject : Percent Encoding Url Components From: "John Cassington" <email@hidden >
Date: Fri, 27 Apr 2007 06:58:01 +1000
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Hi, I have a string containing a URL address which itself has a URL
component as shown: http://www.google.com/search?q=COMPONENT This component is simply an NSString
<http://cocoadev.com/index.pl?NSString >which i need to percent escape
before posting. An example of the components
contents is as follows: 'cocoadev rocks!' I have attempted to replace the space and exclamation mark with their
respective percent-escaped values, %20 and %21 respectively. Here is my code so far, which has not been working: - (NSString <http://cocoadev.com/index.pl?NSString >
*)urlEncodeValue:(NSString <http://cocoadev.com/index.pl?NSString >
*)string {
CFStringRef <http://cocoadev.com/index.pl?CFStringRef >
originalURLString = (CFStringRef
<http://cocoadev.com/index.pl?CFStringRef >)string;
CFStringRef <http://cocoadev.com/index.pl?CFStringRef >
preprocessedString =
CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault,
originalURLString, CFSTR(""), kCFStringEncodingUTF8);
CFStringRef <http://cocoadev.com/index.pl?CFStringRef > urlString =
CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
preprocessedString, NULL, NULL, kCFStringEncodingUTF8);
return (NSString <http://cocoadev.com/index.pl?NSString > *)urlString;
} I have also tried the following - (NSString <http://cocoadev.com/index.pl?NSString >
*)stringByAddingPercentEscapesUsingEncoding:(NSStringEncoding)encoding but that method doesn't seem to encode all values, such as ! and + etc. any ideas as to why this isn't working
thanks, john
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