在URL POST请求中发送其他参数以及图像数据

Question

I am trying to send Image to the PHP with along with other data.

PHP code:

if (isset($_FILES['image'])) {        
    $image = addslashes(file_get_contents($_FILES['image']['tmp_name']));
    .....INSERT INTO DB.....WORKS FINE....
}

Can someone please let me know how to post other data from following iOS code along this image like "id", "index" etc so that I can access it via $_POST["id"]) and $_POST["index"] from above php page.

iOS code:

NSURL *baseURL = [NSURL URLWithString:BASE_URL];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[baseURL URLByAppendingPathComponent:@"upload_image.php"]];
[request setHTTPMethod:@"POST"];

NSString *boundary = @"_187934598797439873422234";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"
--%@
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"image\"; filename=\"image.png\"
" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream

" dataUsingEncoding:NSUTF8StringEncoding]];

NSData *imageData = UIImageJPEGRepresentation(image, 90);
[body appendData:[NSData dataWithData:imageData]];

[body appendData:[[NSString stringWithFormat:@"
--%@--
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPBody:body];
[request addValue:[NSString stringWithFormat:@"%d", [body length]] forHTTPHeaderField:@"Content-Length"];


[NSURLConnection
 sendAsynchronousRequest: request
 queue: [NSOperationQueue new]
 completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {

     NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
     int code = [httpResponse statusCode];

     NSLog(@"%d == %@", code, [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

 }];

Answer 1

after

NSMutableData *body = [NSMutableData data];

just add:

// add params (all params are strings), _params is a Dictionary
for (NSString *param in _params) {
    [body appendData:[[NSString stringWithFormat:@"--%@
", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"

", param] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@
", [_params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
}

and then add the image

[body appendData:[[NSString stringWithFormat:@"
--%@
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"image\"; filename=\"image.png\"
" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream

" dataUsingEncoding:NSUTF8StringEncoding]];
...