干预图像 - 如何上传 MIME 类型的图像：application/octet-stream

Posted 2023-03-14

【中文标题】干预图像 - 如何上传 MIME 类型的图像：application/octet-stream

【英文标题】：Intervention Image - how to upload images with MIME type: application/octet-stream

【发布时间】：2015-02-17 00:31:26

【问题描述】：

我使用 Laravel 框架和干预图像库来上传和处理我页面上的图像。一切正常，直到我尝试更新从移动设备或相机拍摄的 .jpg 图像。这些图像的 MIME 类型为 application/octet-stream 而不是 image/jpeg。当我尝试使用此命令上传图片时：

Image::make($thumb)->resize($this->twidth, $this->theight)->save($this->destination."/".$filename);

我得到错误：

Unable to read image from file

一个不舒服的解决方案是在 MS Paint 中打开图像并重新保存它们，这会将 MIME 类型更改为“图像/jpeg”并使其可以上传。但我想不惜一切代价避开这个解决方案。

编辑：

我试图通过这个命令修复它：

$img = imagecreatefromstring($thumb);

但它返回错误：imagecreatefromstring(): Empty string or invalid image

有没有办法处理这种类型的图像？

【问题讨论】：

Did you search SO before asking?

是的，我找到了，但没有找到这个答案

顺便说一句，它对我不起作用

我在从 android 上传时遇到了同样的问题。当我尝试使用 imagecreatefromstring(//UPLOAD FILE CONTENTS//)

时，我收到 imagecreatefromstring(): gd 警告：内存分配乘法的一个参数为负数或零，操作正常失败

$thumb 里面有什么，一个带有 $path 或 FileUpload 对象的简单字符串？

【参考方案1】：

你可以试一试并将其转换为 Laravel

//The file post to the server
$image = $_FILES['imgfile'];

//array for type if octet
$MimeType = array(
    'useNew' => false,
    'type' => '' 
);

if($image['type'] == "application/octet-stream")
    $imageMimeSize = getimagesize($img['tmp_name']); // get temporary file REAL info
    $MimeType['type'] = $imageMimeSize['mime']; //set in our array the correct mime
    $MimeType['useNew'] = true; //set to true for next if


//now check if we will use the MimeType or the one sent by browser
//$mimeCheck is the things you want to check. In my case i just wanted PNG or JPG
if($MimeType['useNew'] == true) //if true, use MimeType to check file/image file
    $mimeCheckType = ($MimeType['type'] != "image/png" && $MimeType['type'] != "image/jpeg" && $MimeType['type'] != "image/jpg") && $MimeType['type'] != "image/gif");
else //if not using real mime, go with the one device sent to us or browser sent us
    $mimeCheckType = ($img['type'] != "image/png" && $img['type'] != "image/jpeg" && $img['type'] != "image/jpg");


//returns error if image not png/jpg/jpeg/gif
if($mimeCheck)
    //return some error

更多文档。在此访问此链接：Source document

如果你想走极端，可以尝试将其格式化为 Laravel

<?php
// Retrieve JPEG width and height without downloading/reading entire image.
function getjpegsize($img_loc) 
    $handle = fopen($img_loc, "rb") or die("Invalid file stream.");
    $new_block = NULL;
    if(!feof($handle)) 
        $new_block = fread($handle, 32);
        $i = 0;
        if($new_block[$i]=="\xFF" && $new_block[$i+1]=="\xD8" && $new_block[$i+2]=="\xFF" && $new_block[$i+3]=="\xE0") 
            $i += 4;
            if($new_block[$i+2]=="\x4A" && $new_block[$i+3]=="\x46" && $new_block[$i+4]=="\x49" && $new_block[$i+5]=="\x46" && $new_block[$i+6]=="\x00") 
                // Read block size and skip ahead to begin cycling through blocks in search of SOF marker
                $block_size = unpack("H*", $new_block[$i] . $new_block[$i+1]);
                $block_size = hexdec($block_size[1]);
                while(!feof($handle)) 
                    $i += $block_size;
                    $new_block .= fread($handle, $block_size);
                    if($new_block[$i]=="\xFF") 
                        // New block detected, check for SOF marker
                        $sof_marker = array("\xC0", "\xC1", "\xC2", "\xC3", "\xC5", "\xC6", "\xC7", "\xC8", "\xC9", "\xCA", "\xCB", "\xCD", "\xCE", "\xCF");
                        if(in_array($new_block[$i+1], $sof_marker)) 
                            // SOF marker detected. Width and height information is contained in bytes 4-7 after this byte.
                            $size_data = $new_block[$i+2] . $new_block[$i+3] . $new_block[$i+4] . $new_block[$i+5] . $new_block[$i+6] . $new_block[$i+7] . $new_block[$i+8];
                            $unpacked = unpack("H*", $size_data);
                            $unpacked = $unpacked[1];
                            $height = hexdec($unpacked[6] . $unpacked[7] . $unpacked[8] . $unpacked[9]);
                            $width = hexdec($unpacked[10] . $unpacked[11] . $unpacked[12] . $unpacked[13]);
                            return array($width, $height);
                         else 
                            // Skip block marker and read block size
                            $i += 2;
                            $block_size = unpack("H*", $new_block[$i] . $new_block[$i+1]);
                            $block_size = hexdec($block_size[1]);
                        
                     else 
                        return FALSE;
                    
                
            
        
    
    return FALSE;

?>

要将图像转换为 JPEG 试试这个：

<?php
// Access the $_FILES global variable for this specific file being uploaded
// and create local PHP variables from the $_FILES array of information
$fileName = $_FILES["uploaded_file"]["name"]; // The file name
$fileTmpLoc = $_FILES["uploaded_file"]["tmp_name"]; // File in the PHP tmp folder
$fileType = $_FILES["uploaded_file"]["type"]; // The type of file it is
$fileSize = $_FILES["uploaded_file"]["size"]; // File size in bytes
$fileErrorMsg = $_FILES["uploaded_file"]["error"]; // 0 for false... and 1 for true
$fileName = preg_replace('#[^a-z.0-9]#i', '', $fileName); // filter the $filename
$newExt = explode(".", $fileName); // Split file name into an array using the dot
$fileExt = end($newExt); // Now target the last array element to get the file extension

// START PHP Image Upload Error Handling --------------------------------
if (!$fileTmpLoc)  // if file not chosen
    echo "ERROR: Please browse for a file before clicking the upload button.";
    exit();
 else if($fileSize > 5242880)  // if file size is larger than 5 Megabytes
    echo "ERROR: Your file was larger than 5 Megabytes in size.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();
 else if ($fileErrorMsg == 1)  // if file upload error key is equal to 1
    echo "ERROR: An error occured while processing the file. Try again.";
    exit();

// END PHP Image Upload Error Handling ----------------------------------
// Place it into your "uploads" folder mow using the move_uploaded_file() function
$moveResult = move_uploaded_file($fileTmpLoc, "uploads/$fileName");
// Check to make sure the move result is true before continuing
if ($moveResult != true) 
    echo "ERROR: File not uploaded. Try again.";
    exit();

// ---------- Start Universal Image Resizing Function --------
$target_file = "uploads/$fileName";
$resized_file = "uploads/resized_$fileName";
$wmax = 500;
$hmax = 500;
ak_img_resize($target_file, $resized_file, $wmax, $hmax, $fileExt);
// ----------- End Universal Image Resizing Function ----------
// ---------- Start Convert to JPG Function --------
if (strtolower($fileExt) != "jpg") 
    $target_file = "uploads/resized_$fileName";
    $new_jpg = "uploads/resized_".$newExt[0].".jpg";
    ak_img_convert_to_jpg($target_file, $new_jpg, $fileExt);

// ----------- End Convert to JPG Function -----------

echo "The file named <strong>$fileName</strong> uploaded successfuly.<br /><br />";
echo "It is <strong>$fileSize</strong> bytes in size.<br /><br />";
echo "It is an <strong>$fileType</strong> type of file.<br /><br />";
echo "The file extension is <strong>$fileExt</strong><br /><br />";
echo "The Error Message output for this upload is: $fileErrorMsg";
?>

以上代码的更清晰的文档

html

    <div id="profilephoto" class="profilephoto" data-coupling="#content2"><img src="<?php echo $avatar ?>"></div>
    <div id="content2" style="display: none;" class="uploadbutton" data-coupling="#content2">
        <form id="imguploadin" method="POST" action="image_upload_script.php">
            <label class="cabinet"> <i class="icon-upload-alt"></i> Choose Photo
                <input type="file" name="uploaded_file" class="file" onchange="handleFiles(this.files)"/>
            </label>
        </form>
    </div>

jQuery/javascript

function handleFiles(files) 
    for (var i = 0; i < files.length; i++) 
        var file = files[i];
        var imageType = /image.*/;

        if (!file.type.match(imageType)) 
            continue;
        

        var img = document.createElement("img");
        img.classList.add("newphoto");
        img.file = file;
        profilephoto.appendChild(img);

        var reader = new FileReader();
        reader.onload = (function(aImg)  return function(e)  aImg.src = e.target.result; ; )(img);
        reader.readAsDataURL(file);
        var eventt = jQuery.Event("submit");

        $("#imguploadin").trigger(eventt);
    

PHP (image_upload_script.php)

<?php
session_start();
// Access the $_FILES global variable for this specific file being uploaded
// and create local PHP variables from the $_FILES array of information
$username = $_SESSION["username"];
$fileName = $_FILES["uploaded_file"]["name"]; // The file name
$fileTmpLoc = $_FILES["uploaded_file"]["tmp_name"]; // File in the PHP tmp folder
$fileType = $_FILES["uploaded_file"]["type"]; // The type of file it is
$fileSize = $_FILES["uploaded_file"]["size"]; // File size in bytes
$fileErrorMsg = $_FILES["uploaded_file"]["error"]; // 0 for false... and 1 for true
$kaboom = explode(".", $fileName); // Split file name into an array using the dot
$fileExt = end($kaboom); // Now target the last array element to get the file extension
// START PHP Image Upload Error Handling --------------------------------------------------
if (!$fileTmpLoc)  // if file not chosen
    echo "ERROR: Please browse for a file before clicking the upload button.";
    exit();
 else if ($fileSize > 1242880)  // if file size is larger than 5 Megabytes
    echo "ERROR: Your file was larger than 5 Megabytes in size.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();
 else if (!preg_match("/.(gif|jpg|png)$/i", $fileName)) 
    // This condition is only if you wish to allow uploading of specific file types
    echo "ERROR: Your image was not .gif, .jpg, or .png.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();
 else if ($fileErrorMsg == 1)  // if file upload error key is equal to 1
    echo "ERROR: An error occured while processing the file. Try again.";
    exit();

// END PHP Image Upload Error Handling ----------------------------------------------------
// Place it into your "uploads" folder mow using the move_uploaded_file() function
$moveResult = move_uploaded_file($fileTmpLoc, "images/users/$username.$fileExt");
// Check to make sure the move result is true before continuing
if (!$moveResult) 
    echo "ERROR: File not uploaded. Try again.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();

// ---------- Include Adams Universal Image Resizing Function --------
include_once("ak_php_img_lib_1.0.php");
$target_file = "images/users/$username.$fileExt";
$resized_file = "images/users/resized_$username.$fileExt";
$wmax = 200;
$hmax = 150;
ak_img_resize($target_file, $resized_file, $wmax, $hmax, $fileExt);
$thumbnail = "images/users/thumb_$username.$fileExt";
$wthumb = 150;
$hthumb = 150;
ak_img_thumb($target_file, $thumbnail, $wthumb, $hthumb, $fileExt);
// ----------- Write Image File path to the server ---------------------------------
$sql_user = "myuser";
$sql_pass = "mypassword";
$sql_ip = "localhost";
$sql_DB = "mydb";
if ($moveResult != true)
    echo("couldnt write file path to database due to unsuccesfull upload");
    else 
    $mysqli = new mysqli($sql_ip, $sql_user, $sql_pass, $sql_DB);
    if ($stmt = $mysqli->prepare("UPDATE users SET avatar=? WHERE username=?")) 
        $user = $_SESSION['username'];
        $avatar = $resized_file;
        $stmt->bind_param('ss', $avatar, $user);
        $stmt->execute();
        $stmt->close();
        //header('location: profile.html');
        return true;
    
    $mysqli->close();
    

// ----------- End Adams Universal Image Resizing Function -----------
// Display things to the page so you can see what is happening for testing purposes
echo "The file named <strong>$username.$fileExt</strong> uploaded successfuly.<br /><br />";
echo "It is <strong>$fileSize</strong> bytes in size.<br /><br />";
echo "It is an <strong>$fileType</strong> type of file.<br /><br />";
echo "The file extension is <strong>$fileExt</strong><br /><br />";
echo "The Error Message output for this upload is: $fileErrorMsg";
?>

编辑的文档可以在这里找到source

【讨论】：

我在这里看到了***.com/a/11316048/1090395 但这只是检查上传的文件是png、jpg还是gif，对吗？我可以使用 File::mimeType($file) 在 Laravel 中更轻松地做到这一点。从 Android 应用上传文件后，我们需要一种方法将 mime od application/octet-stream 更改为 image/jpeg

但你的问题不清楚，你只陈述你的问题。我现在将添加/编辑我的答案

这不是我的问题，我只是奖励正确的解决方案。他的问题对我来说很清楚

从服务器上传文件后，使用上面的代码进行转换。

它仍然无法正常工作。你是从这里得到的吗developphp.com/video/PHP/… 如果你这样做了，你忘记了包含 ak_php_img_lib_1.0.php 的行。

【参考方案2】：

我会尽量关注您接收文件的方式。先这样试试吧：

$data = file_get_contents($_FILES['myphoto']['tmp_name']);
$image = imagecreatefromstring( $data );

这是对this topic 的引用。

Image::make(
    imagecreatefromstring(
        file_get_contents($_FILES['myphoto']['tmp_name'])
    )
);

// or maybe
$img = Image::make($_FILES['myphoto']['tmp_name']);

对于Intervention image manual，它应该可以工作。;

如果不是答案，请告诉我将值分配给$thumb 的代码是什么。

【参考方案3】：

首先包括输入命名空间

use Illuminate\Support\Facades\Input;

然后改变$thumb变量的值

$inputFileObj = Input::file('filename_here');
$thumb = $inputFileObj->getRealPath();

然后按原样使用您的代码。

【参考方案4】：

你可以这样做，如果 mime 类型是 octet-stream 然后在 base64 中编码并从字符串中制作图像，否则正常制作。

$mime_type = $thumb->getMimeType();
$break = explode('/', $mime_type);
if($break[1] == "octet-stream")
    $imagedata = file_get_contents($thumb);
    $base64 = base64_encode($imagedata);
    Image::make($base64)->resize($this->twidth, $this->theight)->save($this->destination."/".$filename);

else
    Image::make($thumb)->resize($this->twidth, $this->theight)->save($this->destination."/".$filename);

希望对你有帮助

【参考方案5】：

检查 php.ini 中的 upload_max_filesize。这是我的理由。

【讨论】：

谢谢，我也遇到了这个问题，并通过增加上传最大文件大小来解决。

【参考方案6】：

好吧，在这种情况下，您可以删除 Laravel 验证规则 mimes，而可以使用 PHP 通过其扩展名来验证图像。

您的验证规则将如下所示。

$request->validate([
    'image' => 'required',
]);

使用文件扩展名验证图像将如下所示

if (! in_array($request->file('image')->clientExtension(), ['jpg', 'jpeg', 'png'])) 
   // not a valid image