使用PHP从HTTP POST获取图像

Question

So I am sending an image over the internet using HTTP POST and sending it to a php script on my server. I want to be able to take that image and save it. I am doing this fine with text, but when it comes to other content, such as an image, it is error-ing saying it can not find the variable, and when I try file_get_contents, it does not like that either. I am sending the image from an iPhone as well, so my POST Request looks like this.

NSMutableData *postBody = [NSMutableData data];
[postBody appendData:[[NSString stringWithFormat:@"--%@
", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"Content-Disposition: form-data; name=\"media\"; filename=\"dummy.jpg\"
" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"Content-Type: image/jpeg
" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"Content-Transfer-Encoding: binary

" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:imageData];
[postBody appendData:[@"
" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:@"--%@--
", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postRequest setHTTPBody:postBody];

The rest of the request is written, but I do not really feel like posting all of it.

But regardless, that is how I am sending the request, and on the php server side,

<?php
    echo "Some Message";
    $nameValue =  $_POST['name'];
    echo "<br/>";
    echo $nameValue;
    $otherValue =  $_POST['other'];
    echo "<br/>";
    echo $otherValue;
    file_get_contents('dummy.jpg');
    // or I tried this
    $imageData = $_POST['media'];
?>

I can not seem to be able to grab the image. Both attempts of getting the image failed and I do not know why. Any suggestions?

EDIT:

I added the print statement print_r($_FILES) to see what I would get and it returned the following.

(
    [media] => Array
        (
            [name] => dummy.jpg
            [type] => 
            [tmp_name] => 
            [error] => 1
            [size] => 0
        )
)

So it seems as if it is getting the image, at least the name of it, but for some reason it is not getting the actual data and is throwing some error. I imagine this is probably on the iPhone side of things if it is not sending the data and my PHP server is seeing an error. I am unsure though, anyone ever experience something like this?

EDIT 2:

I finally got everything working. It turns out that everything was formatted properly I was just having a file image size upload limit issue. The images I was sending were around 8MB and apparently our server can not handle that, so I simply downed the quality on the jpeg, and that issue was solved. Then there were some permissions issues, as well, nothing a little bit of sudo chmod can't fix. Thanks everyone for your suggestions and help, I wish I could accept more than one answer!

Answer 1

The error code "1" means that the image you tried to upload is too big. http://php.net/manual/en/features.file-upload.errors.php

Check your upload_max_filesize setting in php.ini.

I saw that your are trying to continue with $_FILES['media']['name'], but the actually uploaded file is available by the path given in $_FILES['media']['tmp_name'].

To be sure you handle your upload correctly refer to the php-docu: http://php.net/manual/en/features.file-upload.post-method.php