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通过TCP将JPEG NSData发送到Python服务器_Tcp_Jpeg_Twisted_Nsdata_Nsoutputstream - Fatal编程技术网

通过TCP将JPEG NSData发送到Python服务器

通过TCP将JPEG NSData发送到Python服务器,tcp,jpeg,twisted,nsdata,nsoutputstream,Tcp,Jpeg,Twisted,Nsdata,Nsoutputstream,我有一个Python tcp服务器,它有一个iOS客户端。它能够发送和接收数据,我唯一的问题可能是编码。我正在尝试通过TCP将JPEG发送到Python服务器,并将数据写入服务器上的JPEG。jpeg一直在腐蚀 客户机Obj-C代码: [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection

我有一个Python tcp服务器,它有一个iOS客户端。它能够发送和接收数据,我唯一的问题可能是编码。我正在尝试通过TCP将JPEG发送到Python服务器,并将数据写入服务器上的JPEG。jpeg一直在腐蚀

客户机Obj-C代码:

[self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection
                                                           completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {

            NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
            UIImage *image = [[UIImage alloc] initWithData:imageData];
                                                               iv = [[UIImageView alloc] initWithImage:image];


                                                               [iv setFrame:[[self view]frame]];





                                                               ConnectionManager *netCon = [ConnectionManager alloc];
                                                               conMan = netCon;
                                                               [conMan initNetworkCommunication];



                                                               [conMan.outputStream write:(const uint8_t *)[imageData bytes] maxLength:[imageData length]];



        }];
下面是python(twisted)服务器代码:

from twisted.internet.protocol import Factory, Protocol
from twisted.internet import reactor

class IphoneChat(Protocol):
    def connectionMade(self):
        self.factory.clients.append(self)
        print "clients are ", self.factory.clients

    def connectionLost(self, reason):
        self.factory.clients.remove(self)

    def dataReceived(self, data):
        file = open('test.jpeg','w')

        file.write(data)
        file.close()


factory = Factory()

factory.clients=[]


factory.protocol = IphoneChat
reactor.listenTCP(2000, factory)
print "Iphone Chat server started"
reactor.run()

TCP是一种面向流的协议。它没有消息(因此没有稳定的消息边界)
dataReceived
是用一些字节调用的,至少一个字节,但您不知道还有多少字节

您不能只将传递给
dataReceived
的内容视为完整的图像数据。它是来自图像数据的一些字节。很可能会重复调用
dataReceived
,每次都会从图像数据中提取更多字节。您必须将传递给这些多个调用的数据重新组合为完整的映像数据