[IOS] Question about URL encoding in IOS
The stringbyaddingpercentescapesusingencoding of nsstring can encode the URL parameter, but it is a small problem and will not encode all characters to be encoded. We can use the cfstringref
The cfurlcreatestringbyaddingpercentescapes function encapsulates this function. The Code is as follows:
- (NSString *)encodeToPercentEscapeString: (NSString *) input{ // Encode all the reserved characters, per RFC 3986 // (
Test code:
NSString * testUrl = @"http://search.google.com?keywords=($# it's {a*123})00!*'();:@&=+$,/?%#[]"; NSLog(@"original: %@", testUrl); NSString * encodeStr = [self encodeToPercentEscapeString:testUrl]; NSLog(@"encoded: %@", encodeStr); NSString * encodeStr2 = [testUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSLog(@"encoded2:%@", encodeStr2); NSString * decodeStr = [self decodeFromPercentEscapeString:encodeStr]; NSLog(@"decoded: %@", decodeStr);
The result is as follows:
>> original: http://search.google.com?keywords=($# it's {a*123})00!*'();:@&=+$,/?%#[] >> encoded: http%3A%2F%2Fsearch.google.com%3Fkeywords%3D%28%24%23%20it%27s%20%7Ba%2A123%7D%2900%21%2A%27%28%29%3B%3A%40%26%3D%2B%24%2C%2F%3F%25%23%5B%5D >> encoded2: http://search.google.com?keywords=($%23%20it's%20%7Ba*123%7D)00!*'();:@&=+$,/?%25%23%5B%5D >> decoded: http://search.google.com?keywords=($# it's {a*123})00!*'();:@&=+$,/?%#[]