Question

I m facing a rather strange Issue when trying to load data from an XML-Webservice. The webservice allows me to pass separated identifiers within the URL-Request. It is therefore possible for the URL to become rather long (>240 characters). If I open said URL in firefox the response arrives as planned, if I execute the following code xmlData remains empty.

NSString *baseUrl = [[NSString alloc] initWithString:[[[[kSearchDateTimeRequestTV stringByReplacingOccurrencesOfString:@"{LANG}" withString:appLanguageCode] 
                                              stringByReplacingOccurrencesOfString:@"{IDENTIFIERS}" withString:myIdentifiers]
                                             stringByReplacingOccurrencesOfString:@"{STARTTICKS}" withString:[NSString stringWithFormat:@"%@", [[startTime getTicks] descriptionWithLocale:nil]]]
                                            stringByReplacingOccurrencesOfString:@"{ENDTICKS}" withString:[NSString stringWithFormat:@"%@", [[endTime getTicks] descriptionWithLocale:nil]]]];

NSLog(baseUrl); //looks good, if openend in browser, returnvalue is ok

urlRequest = [NSURL URLWithString:baseUrl];


NSString *xmlData = [NSString stringWithContentsOfURL:urlRequest encoding:NSUTF8StringEncoding error:&err]; //err is nil, therefore i guess everything must be ok... :(

NSLog(xmlData); //nothing...

是否有任何限制,对你们任何人来说是否也存在同样的问题? 什么是好的工作?

感谢您的帮助

萨姆

Answer 1

Before passing baseURL to URLWithString you must ensure that it is a valid url otherwise it will return NULL. You can use the following line of code to encode non-valid characters to percent-escape sequence:

NSString *fixedURL = [baseURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; // or any other encoding

如果在URL中你通过无效特性,大多数浏览器实际上会自动这样做,因此这可能是月球工作的原因。

Claus

友情链接