使用php将数据从iphone应用程序上传到Web服务器

Question

with almost no knowledge in PHP whatsoever, I am trying to send some data (NSData) from my iphone app to my web server (locally for now) but without success (The PHP uploader script is being called since I am getting its error message). could anyone please help me understand what am I doing wrong here?

My iphone app at this point includes only the code below in the ViewDidLoad of my (one and only) viewController, which I have combined from some of the conversations around here:

- (void)viewDidLoad
{
[super viewDidLoad];

  NSData *data;    
const char *bytestring = "black dog";
data = [NSMutableData dataWithBytes:bytestring length:strlen(bytestring)];
NSString *strData = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

NSString *urlString = @"http://localhost/uploader1.php";
NSString *filename = @"filename";
NSMutableURLRequest *request= [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:data]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postbody];

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@", returnString);

}

I have also tried the following PHP uploader script:

  <?php
    $target = "./upload/";
        $target = $target.basename( $_FILES['userfile']['name']) ;

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
    echo "SUCCESS";
}
?> 

What am I doing wrong and how come I cant post this data? Again, the PHP script is getting called cause I get the error message: Wrong file type...

Any help would be much appreciated.

Thanks!

Answer 1

In your Objective-C code you are sending the file like this:

 name=\"userfile\"; filename=\"%@.jpg\"\r\n",

so, in the PHP side, you should access $_FILES["userfile"] , instead of $_FILE["file"] or $_FILE["uploaded"] , to get the correct information about your upload.

If you are still experiencing problems, first suggestion is putting some traces server-side:

print_r($_REQUEST);

will give you a list of all the $_POST/$_GET/cookies input parameters, so you can better know what is happening. Furthermore, I would suggest also tracing:

print_r($_FILES);

it could be that the ObjC side is sending wrong data, or that wrong data is read on the server side.

EDIT: the error you are getting:

"Wrong file type..."

depends on the fact that you are trying to calculate the size of the uploaded file as if it were an image:

 $check = getimagesize($_FILES['userfile']['tmp_name']);
 if($check[0]>0 && $check[1]>0 && $check['mime']=='image/jpg'){

while in fact you are sending a simple string as file content:

 const char *bytestring = "black dog";

either you remove the check, or you upload a real file.

EDIT:

Use these lines:

error_reporting(E_ALL);
ini_set("display_errors", 1); 

to make error reporting more verbose, so you possibly know why it is failing...

Answer 2

Did you try ASIHTTPRequest? http://allseeing-i.com/ASIHTTPRequest/

Answer 3

For target path dont use HTTP, use the method below.

Instead of doing file_put_contents(***WebSiteURL***...) you need to use the server path to /cache/lang/file.php (eg /home/content/site/folders/filename.php).

You cannot open a file over HTTP and expect it to be written. Instead you need to open it using the local path.