Objective c - Writing image file to ip address - objective-c

Question

Experts:
I've been researching all morning on how to write an image file to another computer via IP Address. Do I really need to create sockets, set delegates, schedule a run loop, check space available, and all that hoopla? Really? Can't I just save the file to a URL using the IP Address and default port?
I'm asking this question because I'm not making much progress on my own and I know the minute I hit Post Your Question I'll find some useful information. But in case that does not happen, please reply. Any help is appreciated.
This is the code I have and I think I'm on the wrong track:
#import "TESTtcpController.h"
#interface TESTtcpController()
#property (nonatomic, strong)NSInputStream *inputStream;
#property (nonatomic, strong)NSOutputStream *outputStream;
//void CFStreamCreatePairWithSocketToHost (
// CFAllocatorRef alloc,
// CFStringRef host,
// UInt32 port,
// CFReadStreamRef *readStream,
// CFWriteStreamRef *writeStream
// );
#end
#implementation TESTtcpController
+ (void)sendFile:(UIImage *)image
{
UInt32 port = 80;
NSString *ipAddress = #"10.10.10.10";
TESTtcpController *tcpController = [[TESTtcpController alloc] init];
[tcpController connect:port ipAddress:ipAddress];
[tcpController postFile:image];
[tcpController disconnect];
tcpController = nil;
}
-(void)connect:(UInt32)port ipAddress:(NSString *)ipAddress
{
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)ipAddress, port, &readStream, &writeStream);
self.inputStream = (__bridge NSInputStream *)readStream;
self.outputStream = (__bridge NSOutputStream *)writeStream;
[self.inputStream setDelegate:self];
[self.outputStream setDelegate:self];
[self.inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[self.outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[self.inputStream open];
[self.outputStream open];
NSLog(#"input stream id %#", self.inputStream);
/* Store a reference to the input and output streams so that
they don't go away.... */
}
- (void)postFile:(UIImage *)image
{
}
- (void)dataSending:(NSString*)data {
if(self.outputStream) {
if(![self.outputStream hasSpaceAvailable])
return;
NSData *_data=[data dataUsingEncoding:NSUTF8StringEncoding]; int data_len = [_data length];
uint8_t *readBytes = (uint8_t *)[_data bytes];
int byteIndex=0;
unsigned int len=0;
while (TRUE) {
len = ((data_len - byteIndex >= 40960) ? 40960 : (data_len-byteIndex));
if(len==0)
break;
uint8_t buf[len]; (void)memcpy(buf, readBytes, len);
len = [self.outputStream write:(const uint8_t *)buf maxLength:len]; byteIndex += len;
readBytes += len; }
}
}
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode
{
switch(eventCode) {
case NSStreamEventNone:
break;
case NSStreamEventOpenCompleted:
break;
case NSStreamEventHasBytesAvailable:
break;
case NSStreamEventHasSpaceAvailable:
// {
// uint8_t *readBytes = (uint8_t *)[_data mutableBytes];
// readBytes += byteIndex; // instance variable to move pointer
// int data_len = [_data length];
// unsigned int len = ((data_len - byteIndex >= 1024) ?
// 1024 : (data_len-byteIndex));
// uint8_t buf[len];
// (void)memcpy(buf, readBytes, len);
// len = [stream write:(const uint8_t *)buf maxLength:len];
// byteIndex += len;
// break;
// }
case NSStreamEventErrorOccurred:
break;
case NSStreamEventEndEncountered:
break;
// continued ...
}
}
-(void)disconnect{
NSLog(#"disconnect method called");
NSStreamStatus socketStatus = [self.outputStream streamStatus];
int status = socketStatus;
NSLog(#"Stream Status is %i", status);
if (status == 2) {
[self.inputStream close];
[self.outputStream close];
NSLog(#"Socket Closed");
}
}
- (void)deallocMe
{
[TESTtcpController dealloc];
}
#end

Answer 1

You should use the AFNetworking library. Image uploads will be trivial. Read about AFNetworking here: http://cocoadocs.org/docsets/AFNetworking/2.0.0/
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSURL *URL = [NSURL URLWithString:#"http://example.com/upload"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSURL *filePath = [NSURL fileURLWithPath:#"file://path/to/image.png"];
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
if (error) {
NSLog(#"Error: %#", error);
} else {
NSLog(#"Success: %# %#", response, responseObject);
}
}];
[uploadTask resume];