send UIImage to HTTP server Objective C - ios

Question

I send an image to a server HTTP with this code:
-(NSDictionary*)sendImage:(UIImage*)image withDescription:(NSString*)description andTarget:(NSString*)target andTargetId:(int)targetId {
__block NSDictionary *result = nil;
NSData *imageData = UIImagePNGRepresentation(image);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"%#%#", PREFIX_URL_REQUEST, SEND_IMAGE]]];
[request setHTTPMethod:REQUEST_TYPE_POST];
NSString *boundary = [[NSString alloc] init];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"file\"; filename=\"%#.%d\"rn", target, targetId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Type: application/%#.png\r\n\r\n", [NSString stringWithFormat:#"%#_%d", target, targetId]] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
dispatch_semaphore_t sem = dispatch_semaphore_create(0);
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
result = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(#"%#", result.description);
dispatch_semaphore_signal(sem);
}];
[dataTask resume];
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
return result;
}
this is the server code:
session_start();
if ( isset($_SESSION['username']) ) {
$params = explode(".", basename($_FILES["file"]["name"]));
$target = array_values($params)[0];
$id = array_values($params)[1];
if ( ($target == "profile") || ($target == "question" && $_SESSION["waitingImagesQuestion"] > 0) || ($target == "answer" && $_SESSION["waitingImagesAnswer"] > 0) ) {
$imageDirectory = "images/".round(microtime(true)*1000).".png";
if ( move_uploaded_file($_FILES["file"]["tmp_name"], $imageDirectory) ) {
switch ( $target ) {
case "profile":
print JsonBuilder::putRecordProfileImage($imageDirectory);
return;
case "answer":
$_SESSION["waitingImagesAnswer"] --;
print JsonBuilder::putRecordAnswerImage($imageDirectory, $id);
return;
case "question":
$_SESSION["waitingImagesQuestion"] --;
print JsonBuilder::putRecordQuestionImage($imageDirectory, $id);
return;
}
}
}
}
print JsonBuilder::getStringError();
works, but only when I call the client method so ([UIImage imageNamed:#"aaa.png"]):
[sender sendImage:[UIImage imageNamed:#"aaa.png"] withDescription:#"" andTarget:#"profile" andTargetId:1];
if I call the method with an UIImage (for example a photo taken from the camera roll), so:
-(void)sendImage:(UIImage*)image {
return [sender sendImage:image withDescription:#"" andTarget:#"profile" andTargetId:1];
}
doesn't work!
Why?
Thanks

Answer 1

now it works:
-(NSDictionary*)sendImage:(UIImage*)image withDescription:(NSString*)description andTarget:(NSString*)target andTargetId:(int)targetId {
if ( image != nil ) {
NSData *imageData = UIImageJPEGRepresentation(image, 0.33f);
__block NSDictionary *result = nil;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"%#%#", PREFIX_URL_REQUEST, SEND_IMAGE]]];
[request setHTTPMethod:REQUEST_TYPE_POST];
NSString *boundary = #"0xKhTmLbOuNdArY";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"file\"; filename=\"%#.%d\"rn", target, targetId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Type: application/%#.png\r\n\r\n", [NSString stringWithFormat:#"%#_%d", target, targetId]] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
dispatch_semaphore_t sem = dispatch_semaphore_create(0);
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
result = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
dispatch_semaphore_signal(sem);
}];
[dataTask resume];
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
return result;
}
return nil;
}