NSURL不支持在url中使用花括号(即{})。我的应用程序需要与需要在URL中使用花括号的服务器进行通信。我正在考虑使用桥接器在Python或c++中编写网络代码,甚至重写NSURL的C代码以使其接受花括号。我的远程服务器不接受百分号转义。
我有其他好的选择吗?
编辑:解释了为什么添加percentescapesusingencoding等不适合我这里
如果您转义大括号,它会为您工作吗?
这个代码:// escape {} with %7B and %7D
NSURL *url = [NSURL URLWithString:@"http://somesite.com/%7B7B643FB915-845C-4A76-A071-677D62157FE07D%7D.htm"];
NSLog(@"%@", url);
// {} don't work and return null
NSURL *badurl = [NSURL URLWithString:@"http://somesite.com/{7B643FB915-845C-4A76-A071-677D62157FE07D}.htm"];
NSLog(@"%@", badurl);
输出:
2011-11-30 21:25:06.655 Craplet[48922:707] http://somesite.com/%7B7B643FB915-845C-4A76-A071-677D62157FE07D%7D.htm
2011-11-30 21:25:06.665 Craplet[48922:707] (null)
所以,转义似乎有效
以下是如何通过编程转义url的方法:NSString *escapedUrlString = [unescaped stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];
编辑:在你的评论下面,你说你的服务器不会接受编码大括号,有没有其他的选择。首先,我会尝试修复服务器。如果这是不可能的……我还没有试过用牙套等等……但是NS网络类下面的层是CFNetworking。
看到这个:
http://developer.apple.com/library/ios/文档/网络/概念/CFNetwork/CFHTTPTasks CFHTTPTasks.html #//apple_ref/doc/uid/TP30001132-CH5-SW2
From the doc:
CFStringRef url = CFSTR("http://www.apple.com");
CFURLRef myURL = CFURLCreateWithString(kCFAllocatorDefault, url, NULL);
CFStringRef requestMethod = CFSTR("GET");
....
再说一次,我还没试过,快用完了。可能以后会尝试,但如果一个层不工作,你的第一个选择是向下移动堆栈
Bryan的回答非常好(给他+1 !),但另一个解决方案是使用NSString的stringByAddingPercentEscapesUsingEncoding:
方法。
:
NSString * originalURLAsString = [NSString stringWithString: @"http://somesite.com/{7B643FB915-845C-4A76-A071-677D62157FE07D}.htm"];
NSString * properlyEncodedString = [originalURLAsString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
NSURL * url = [NSURL URLWithString: properlyEncodedString];
我希望这个信息能帮助你!
使用CFNetwork调用可以使用下面的
-(void)getDataFromUrl{
CFStringRef tempURLA = CFSTR("http://my.test.server/iostest/index.html?{"a":"b"}");
CFStringRef tempUrlSting = CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)tempURLA,CFSTR("{}"), CFSTR("""), CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
CFURLRef myURL = CFURLCreateWithString(kCFAllocatorDefault, tempUrlSting, NULL);
CFStringRef requestMethod = CFSTR("GET");
CFHTTPMessageRef myRequest = CFHTTPMessageCreateRequest(kCFAllocatorDefault, requestMethod, myURL,kCFHTTPVersion1_1);
CFStringRef headerFieldName = CFSTR("Accept");
CFStringRef headerFieldValue = CFSTR("text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
CFHTTPMessageSetHeaderFieldValue(myRequest, headerFieldName, headerFieldValue);
[self performHTTPRequest:myRequest];
}
-(void)performHTTPRequest:(CFHTTPMessageRef)request {
CFURLRef gotdatab = (__bridge CFURLRef)(CFBridgingRelease(CFHTTPMessageCopyRequestURL(request)));
// NSLog(@"(CFHTTPMessageRef request %@",gotdatab);
CFReadStreamRef requestStream = CFReadStreamCreateForHTTPRequest(NULL, request);
CFReadStreamOpen(requestStream);
NSMutableData *responseBytes = [NSMutableData data];
NSError *error;
while (TRUE) {
if (CFReadStreamHasBytesAvailable(requestStream)) {
UInt8 streambuffer[1024];
int readBytes = CFReadStreamRead (requestStream,streambuffer,sizeof(streambuffer));
NSLog(@"Read: %d",readBytes);
[responseBytes appendBytes:streambuffer length:readBytes];
}
if (CFReadStreamGetStatus(requestStream) == kCFStreamStatusError) {
error = (NSError*)CFBridgingRelease(CFReadStreamCopyError (requestStream));
if ([error code] == 61) {
// connection refused
NSLog(@"Error occured: %d",[error code]);
}
break;
}
if (CFReadStreamGetStatus(requestStream) == kCFStreamStatusAtEnd) {
NSLog(@"Stream reached end!");
error = nil;
break;
}
}//
CFHTTPMessageRef response = (CFHTTPMessageRef)CFReadStreamCopyProperty(requestStream, kCFStreamPropertyHTTPResponseHeader);
if (response==NULL) {
NSLog(@"response is null");
return;
}
}
以上是用这里和这里的例子完成的
但是即使上面的方法也有同样的问题。也就是说:如果{}未被编码,则不会生成URL。如果{}被编码,服务器不会返回正确的值。
还有其他解决这个帖子问题的建议吗?