使用PHP从HTTP POST获取图像 [英] Get image from HTTP POST with PHP

问题描述

因此，我使用HTTP POST通过互联网发送图像并将其发送到我的服务器上的一个php脚本。我希望能够拍摄并保存该图像。我对文本做的很好，但是当涉及到其他内容时，例如图像，错误地说它找不到变量，而当我尝试 file_get_contents

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

请求的其余部分已写入，但我并不想发布所有请求。

不过，无论如何，这就是我发送请求的方式，并且在PHP服务器端，

 <？php 
 echoSome Message; 
 $ nameValue = $ _POST ['name']; 
回声< br />; 
 echo $ nameValue; 
 $ otherValue = $ _POST ['other']; 
回声< br />; 
 echo $ otherValue; 
 file_get_contents（'dummy.jpg'）; 
 //或者我试过这个
 $ imageData = $ _POST ['media']; 
？> 
  

我似乎无法抓住图像。这两个尝试获取图像失败，我不知道为什么。有什么建议吗？

编辑： 我添加了print语句 print_r（$ _ FILES），看看我会得到什么，并返回下列内容。

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

所以它看起来像是获取图像，至少是它的名字，但由于某种原因，它没有得到实际的数据，并且正在抛出一些错误。我想这可能是在iPhone的一面，如果它不发送数据，我的PHP服务器发现错误。我不确定，任何人都会遇到这样的事情吗？

编辑2： b
$ b <我终于得到了一切工作。事实证明，一切都格式正确我只是有一个文件图像大小上传限制问题。我发送的图像大约是8MB，显然我们的服务器无法处理，所以我只是降低了jpeg的质量，而这个问题就解决了。然后还有一些权限问题，没有一点 sudo chmod 无法修复。谢谢大家的建议和帮助，我希望我可以接受多个答案！ 解决方案

<1>错误代码1表示您尝试上传的图片太大了。
http://php.net/manual/en/features .file-upload.errors.php

检查您在php.ini中的upload_max_filesize设置。

我看到你正在试图继续使用$ _FILES ['media'] ['name']，但实际上传的文件可以通过$ _FILES ['media'] ['tmp_name']中给出的路径获得。 p>

为确保正确处理您的上传，请参阅php-docu：
http://php.net/manual/en/features.file-upload.post-method.php

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

解决方案

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

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