Attaching an image and posting to a JSON API - ios

Question

How can I create a post with an image and attach it as a featured image from iPhone app?
I am using wordpress with JSON API plugin
My url to create post: <-- Reference to this
http://www.example.com/api/create_post/?nonce=eea4bb4ce5&status=publish&title=Test&content=test%20content&categories=animals
Now I need to attach an image from the phone gallery to this url. How can I do this?

Answer 1

Try this. Use JSON POST method. You can append all your parameters like this.
-(void)uploadImage
{
NSString *method = #"";
NSString *username = #"";
NSString *token = #"";
NSString *urlString = [NSString stringWithFormat:#"%#",#"yoururl"];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSMutableData *body = [NSMutableData data];
// file
NSData *imageData = UIImageJPEGRepresentation( imageView.image, 0.8);
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"image\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// parameter username
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"username\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[username dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// parameter token
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"auth_token\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[token dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// // parameter method
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"method\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[method dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// close form
[body appendData:[[NSString stringWithFormat:#"--%#--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(#"%#",returnString);
[returnString release];
}
Hope this may help you.

Answer 2

To full fill your requirement you need to send image file on web-service using by POST method
First chose image from Photo Library or take it from the camera and make data of that Image using following code.
NSString *imgName = [NSString stringWithFormat:#"ImageTest"];
NSData *imgData=UIImagePNGRepresentation(imgView.image);
NSString* urlstring = [NSString stringWithFormat:#"http://www.example.com/api/create_post/?nonce=eea4bb4ce5&status=publish&title=Test&content=test%20content&categories=animals&imageFile=%#",imgName];
NSLog(#"URL >> %#",urlstring);
NSURL url = [NSURL URLWithString:[urlstring stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
//===============================================
NSMutableURLRequest postRequest = [[[NSMutableURLRequest alloc] init] autorelease];
[postRequest setURL:url];
[postRequest setHTTPMethod:#"POST"];
NSString boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[postRequest addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [[NSMutableData alloc] init];
[postRequest addValue:contentType forHTTPHeaderField: #"Content-Type"];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"userfile\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
imgName this is very important object in this code it's image which you need to pass in your web service which is shown as above.
[body appendData:[[NSString stringWithString:[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"%#.png\"\r\n",imgName]] dataUsingEncoding:NSUTF8StringEncoding]]; //img name
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// Add Image imgData is Declare as Above.
[body appendData:[NSData dataWithData:imgData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postRequest setHTTPBody:body];
NSURLResponse *response;
NSError error = nil;
NSData* data = [NSURLConnection sendSynchronousRequest:postRequest returningResponse:&response error:&error];
NSString *result=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
// NSString * jsonRes = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
NSLog(#"result = %#",[result JSONValue]);
It perfectly working with me ! I hope you may get help from here!