perf: 优化图片消息

app/Models/WebSocketDialogMsg.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Module\ImgCompress;
 use Carbon\Carbon;
 use App\Models\User;
 use App\Module\Base;
@@ -587,6 +588,7 @@ class WebSocketDialogMsg extends AbstractModel
             Base::makeDir(public_path($imagePath));
             $imagePath .= md5s($base64) . "." . $matchs[1][$key];
             if (file_put_contents(public_path($imagePath), base64_decode($base64))) {
+                ImgCompress::compress(public_path($imagePath));
                 $imageSize = getimagesize(public_path($imagePath));
                 if (Base::imgThumb(public_path($imagePath), public_path($imagePath) . "_thumb.jpg", 320, 0)) {
                     $imagePath .= "_thumb.jpg";
@@ -661,6 +663,7 @@ class WebSocketDialogMsg extends AbstractModel
                 if (empty($image)) {
                     $text = str_replace($matchs[0][$key], "[:IMAGE:browse:90:90:images/other/imgerr.jpg::]", $text);
                 } else if (file_put_contents(public_path($imagePath), $image)) {
+                    ImgCompress::compress(public_path($imagePath));
                     $imageSize = getimagesize(public_path($imagePath));
                     if (Base::imgThumb(public_path($imagePath), public_path($imagePath) . "_thumb.jpg", 320, 0)) {
                         $imagePath .= "_thumb.jpg";

app/Module/ImgCompress.php

@@ -0,0 +1,152 @@
+<?php
+
+namespace App\Module;
+
+@error_reporting(E_ALL & ~E_NOTICE & ~E_WARNING);
+
+/**
+ * 图片压缩类：通过缩放来压缩。
+ * 如果要保持源图比例，把参数$percent保持为1即可。
+ * 即使原比例压缩，也可大幅度缩小。数码相机4M图片。也可以缩为700KB左右。如果缩小比例，则体积会更小。
+ *
+ * 结果：可保存、可直接显示。
+ */
+class ImgCompress
+{
+    private $src;
+    private $image;
+    private $imageinfo;
+    private $percent;
+
+    /**
+     * 图片压缩
+     * @param string $src 源图
+     * @param float $percent 压缩比例
+     */
+    public function __construct($src, $percent = 1)
+    {
+        $this->src = $src;
+        $this->percent = $percent;
+    }
+
+    /** 高清压缩图片
+     * @param string $saveName 提供图片名（可不带扩展名，用源图扩展名）用于保存。或不提供文件名直接显示
+     */
+    public function compressImg($saveName = '')
+    {
+        $this->_openImage();
+        if (!empty($saveName)) $this->_saveImage($saveName);  //保存
+        else $this->_showImage();
+    }
+
+    /**
+     * 内部：打开图片
+     */
+    private function _openImage()
+    {
+        list($width, $height, $type, $attr) = getimagesize($this->src);
+        $this->imageinfo = array(
+            'width' => $width,
+            'height' => $height,
+            'type' => image_type_to_extension($type, false),
+            'attr' => $attr
+        );
+        $fun = "imagecreatefrom" . $this->imageinfo['type'];
+        $this->image = $fun($this->src);
+        $this->_thumpImage();
+    }
+
+    /**
+     * 内部：操作图片
+     */
+    private function _thumpImage()
+    {
+        $new_width = $this->imageinfo['width'] * $this->percent;
+        $new_height = $this->imageinfo['height'] * $this->percent;
+        $image_thump = imagecreatetruecolor($new_width, $new_height);
+        //将原图复制带图片载体上面，并且按照一定比例压缩,极大的保持了清晰度
+        imagecopyresampled($image_thump, $this->image, 0, 0, 0, 0, $new_width, $new_height, $this->imageinfo['width'], $this->imageinfo['height']);
+        imagedestroy($this->image);
+        $this->image = $image_thump;
+    }
+
+    /**
+     * 输出图片:保存图片则用saveImage()
+     */
+    private function _showImage()
+    {
+        header('Content-Type: image/' . $this->imageinfo['type']);
+        $funcs = "image" . $this->imageinfo['type'];
+        $funcs($this->image);
+    }
+
+    /**
+     * 保存图片到硬盘：
+     * @param string $dstImgName 1、可指定字符串不带后缀的名称，使用源图扩展名 。2、直接指定目标图片名带扩展名。
+     */
+    private function _saveImage($dstImgName)
+    {
+        if (empty($dstImgName)) return false;
+        if (str_contains($dstImgName, '.')) {
+            $dstName = $dstImgName;
+        } else {
+            $allowImgs = ['.jpg', '.jpeg', '.png', '.bmp', '.wbmp', '.gif'];   //如果目标图片名有后缀就用目标图片扩展名 后缀，如果没有，则用源图的扩展名
+            $dstExt = strrchr($dstImgName, ".");
+            $sourseExt = strrchr($this->src, ".");
+            if (!empty($dstExt)) $dstExt = strtolower($dstExt);
+            if (!empty($sourseExt)) $sourseExt = strtolower($sourseExt);
+            //有指定目标名扩展名
+            if (!empty($dstExt) && in_array($dstExt, $allowImgs)) {
+                $dstName = $dstImgName;
+            } elseif (!empty($sourseExt) && in_array($sourseExt, $allowImgs)) {
+                $dstName = $dstImgName . $sourseExt;
+            } else {
+                $dstName = $dstImgName . $this->imageinfo['type'];
+            }
+        }
+        $funcs = "image" . $this->imageinfo['type'];
+        $funcs($this->image, $dstName);
+        return true;
+    }
+
+    /**
+     * 销毁图片
+     */
+    public function __destruct()
+    {
+        imagedestroy($this->image);
+    }
+
+    /**
+     * 压缩图片静态方法
+     * @param string $src 原图地址
+     * @param float $percent 压缩比例
+     * @param float $minSize 最小压缩大小，小于这个不压缩，单位KB
+     * @return void
+     */
+    public static function compress(string $src, float $percent = 1, float $minSize = 100): void
+    {
+        if (!file_exists($src)) {
+            return;
+        }
+        $size = filesize($src);
+        if ($minSize > 0 && $size < $minSize * 1024) {
+            return;
+        }
+        try {
+            $img = new ImgCompress($src, $percent);
+            $tmp = $src . '.compress.tmp';
+            $img->compressImg($tmp);
+            if (file_exists($tmp)) {
+                if (filesize($tmp) > $size) {
+                    unlink($tmp);
+                    return;
+                }
+                unlink($src);
+                rename($tmp, $src);
+            }
+        } catch (\Exception) {
+            return;
+        }
+    }
+}