how to post an image to the web server

Question

I am working with web services using json parsing. I am able to get images from the web services, can someone help me how to post an image? How i can post an image to the web services?

Answer 1

it will be something along the lines of this...

NSMutableURLRequest *mutableRequest = [[NSMutableURLRequest alloc] initWithURL:@"you url"];

[mutableRequest addValue:@"image/jpeg" forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];

[body appendData:[NSData dataWithData:UIImageJPEGRepresentation(self.image, 0.9)]];

[mutableRequest setHTTPBody:body];

NSURLResponse *response;
NSError *error;

(void) [NSURLConnection sendSynchronousRequest:mutableRequest returningResponse:&response error:&error];

Thanks

Answer 2

Check below good tutorial.In that tutorial you able to find the ios side code as well server side php code too. http://zcentric.com/2008/08/29/post-a-uiimage-to-the-web/

Answer 3

Find here serverside (PHP) coding for image Upload with random name. also it will give the image link as response.

//Create a folder named images in your server where you want to upload the image.
// And Create a PHP file and use below code .


<?php
$uploaddir = 'images/';
$ran = rand () ;

$file = basename($_FILES['userfile']['name']);
$uploadfile = $uploaddir .$ran.$file;

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
        echo "www.host.com/.../images/{$uploadfile}";
}
?>

And Here is iOS code

- (IBAction)uploadClicked:(id)sender
{
    /*
         turning the image into a NSData object
         getting the image back out of the UIImageView
         setting the quality to 90
        */
        NSData *imageData = UIImageJPEGRepresentation(imageView.image, 90);
        // setting up the URL to post to
        NSString *urlString = @"your URL link";

        // setting up the request object now
        NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
        [request setURL:[NSURL URLWithString:urlString]];
        [request setHTTPMethod:@"POST"];

        /*
         add some header info now
         we always need a boundary when we post a file
         also we need to set the content type

         You might want to generate a random boundary.. this is just the same 
         as my output from wireshark on a valid html post
        */
        NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
        NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
        [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

        /*
         now lets create the body of the post
        */
        NSMutableData *body = [NSMutableData data];
        [body appendData:[[NSString stringWithFormat:@"rn--%@rn",boundary] dataUsingEncoding:NSUTF8StringEncoding]];    
        [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name="userfile"; filename="ipodfile.jpg"rn"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-streamrnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[NSData dataWithData:imageData]];
        [body appendData:[[NSString stringWithFormat:@"rn--%@--rn",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);

}

Answer 4

使用ASIHttpFormData的最佳方法点击此处了解如何使用