我正在尝试以流模式在http下上传线性文件。
想法是同时执行此步骤,
1)线程1:录制音频文件并将其存储在临时文件中
2)线程2:从临时文件中获取n个字节,并将其发送到http服务器。
我该如何写一个HTTP流?在CFHTTPStream上我没有看到写方法,只读了:s
我需要使用 socket 吗?
谢谢!!!
我的实际代码是
CFWriteStreamRef stream;
NSString *strUrl = @"myurl";
NSURL *url = [[[NSURL alloc] initWithString:strUrl] retain];
CFStringRef requestMethod = CFSTR("GET");
CFHTTPMessageRef message= CFHTTPMessageCreateRequest(kCFAllocatorDefault, requestMethod, (CFURLRef)url, kCFHTTPVersion1_1);
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Content-Type"),
CFSTR("multipart/form-data"));
stream = ?? //CFReadStreamCreateForHTTPRequest(NULL, message);
CFRelease(message);
//other headers...
if (CFWriteStreamSetProperty(stream, kCFStreamPropertyHTTPShouldAutoredirect, kCFBooleanTrue) == false)
{
NSLog(@"Error");
return NO;
}
//
// Open the stream
//
if (!CFWriteStreamOpen(stream))
{
CFRelease(stream);
NSLog(@"Error");
return NO;
}
CFStreamClientContext context = {0, self, NULL, NULL, NULL};
CFWriteStreamSetClient(stram, kCFStreamEventHasBytesAvailable | kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered,
RSWriteStreamCallBack,
&context);
CFWriteStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
最佳答案
解决方案是创建NSInputStream的子类,并实现打开,关闭,读取,hasBytesAvailable和不要忘记的方法-(NSStreamStatus)streamStatus。
从http调用了最后一个方法,以了解我们是打开,关闭还是完成(NSStreamStatusAtEnd)发送(还有其他状态,但这是最重要的)。
我使用tmp文件之类的缓冲区,因为我必须发送大量数据,但是,也许数据存储缓冲区可能会更好。
最后,我在使用自定义NSInputStream的地方实现了其他类,下面是代码:
NSURL *url = [NSURL URLWithString:@"url"];
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
[req setHTTPMethod:@"POST"];
//set headers if you have to do for example:
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data"];
[req setValue:contentType forHTTPHeaderField:@"Content-Type"];
//Create your own InputStream
instream = [[CustomStream alloc] init];
[req setHTTPBodyStream:instream];
//I remove instream later
NSURLConnection *aConnection = [[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:NO];
[aConnection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[aConnection start];
关于objective-c - 上载音频-HTTP流,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10537302/