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I have a video upload system in an iOS app using NSURLSessionUploadTask. The video file is saved to an NSURL so I am using the following code in my upload method:

request.HTTPMethod = @"POST";
[request addValue:@"file" forHTTPHeaderField:@"fileName"];

// Create upload task
NSURLSessionUploadTask *task = [session uploadTaskWithRequest:request fromFile:filePath completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if(!error) {
        // handle success
    } else {
        // handle error
    }
}];

// Run the task
[task resume];

I have a PHP server (using Laravel) running under nginx to handle this upload. I have tested it with Postman, and it accepts uploads fine (expecting a file under the name "file").

When I run the above objc code, the server tells me that no file has been uploaded (the $_FILES array is empty).

I have tried with and without setting the "fileName" header, and I've tried setting "Content-Type" to "multipart/form-data" but none of these works.

How can I get NSURLSessionUploadTask to properly upload these files (from an NSURL) to the server?

This post seems to detail a similar problem: NSURLSessionUploadTask not passing file to php script

Community
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GTF
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  • What's in your file? Bear in mind that PHP will be expecting the body to look like a [form-based file upload](http://stackoverflow.com/questions/8659808/how-does-http-file-upload-work), and uploadTaskWithRequest doesn't do anything "smart"—it just sends your file as the body data, I believe. – Matt Gibson Oct 01 '14 at 08:20
  • Solved this (sort of) by just using AFNetworking and getting around the problems with authentication by writing the auth headers "manually" (base64 encode etc.). – GTF Oct 02 '14 at 11:08

1 Answers1

8

When using NSURLSessionUploadTask [uploadTaskWithRequest: fromFile:], the file is sent in the request body as binary.

To save that file in PHP you can simply get the request body and save it to file.

Obviously, it is best to do some sort of file format validation.

Objective-C Code:

// Define the Paths
NSURL *URL = [NSURL URLWithString:kDestinationURL];

// Create the Request
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:@"POST"];

// Configure the NSURL Session
NSURLSessionConfiguration *config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:@"com.upload"];
config.HTTPMaximumConnectionsPerHost = 1;
NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];

// Define the Upload task
NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromFile:audioRecorder.url];

// Run it!
[uploadTask resume];

PHP Code:

<?php
    // File Path to save file
    $file = 'uploads/recording.m4v';

    // Get the Request body
    $request_body = @file_get_contents('php://input');

    // Get some information on the file
    $file_info = new finfo(FILEINFO_MIME);

    // Extract the mime type
    $mime_type = $file_info->buffer($request_body);

    // Logic to deal with the type returned
    switch($mime_type) 
    {
        case "video/mp4; charset=binary":

            // Write the request body to file
            file_put_contents($file, $request_body);

            break;

        default:
            // Handle wrong file type here
    }
?>

I wrote a code example of recording audio and uploading it to a server here: https://github.com/gingofthesouth/Audio-Recording-Playback-and-Upload

I hope that helps.

Ernest Cunningham
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  • I found a way around it by using AFNetworking, so can't test this, but will remember it for future ref, thanks. – GTF Feb 02 '15 at 09:01
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    can we post the parameter also in this?because i am trying to post but didnt found success – Mukesh Jun 30 '15 at 07:05