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app/service/AwsUploadService.php

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+<?php
+namespace app\service;
+use Aws\S3\S3Client;
+use think\facade\Log;
+use think\File;
+
+class AwsUploadService
+{
+    /**
+     * 处理表单文件上传并转发到目标服务器
+     *
+     * @param string $fileField 表单文件字段名
+     * @param array $extraFields 额外传递的字段
+     * @return array 包含上传结果的数组
+     */
+    public function uploadAndForward( File $file, string $fileField,array $extraFields = []): array
+    {
+
+        $mimeType = $file->getMime();
+        $s3config = config('filesystem.disks.s3');
+        $s3 = new S3Client($s3config);
+        try {
+            $config = config('app.upload_conf');
+            $configs=[];
+            foreach ($config as $key=>$con){
+                $configs[] = $key.':'.$con;
+            }
+
+           // 验证文件
+            $validate = validate([
+                $fileField =>implode('|',$configs),
+            ]);
+
+            if (!$validate->check([$fileField => $file])) {
+                return $this->createErrorResult($validate->getError());
+            }
+
+            // 根据文件类型设置 Content-Type
+            if (in_array($mimeType, config('app.imageMimeTypes'))) {
+                $contentType = $mimeType; // 使用图片的实际 MIME 类型
+            } else {
+                $contentType = 'application/octet-stream'; // 非图片文件使用默认类型
+            }
+            $checkBucket = $this->checkBucket($s3, $extraFields['Bucket']);
+            if (!$checkBucket) {
+                return $this->createErrorResult('Bucket error');
+            }
+            $s3->putObject([
+                'Bucket' => $extraFields['Bucket'],
+                'Key' => $extraFields['Key'],
+                'Body' => fopen($file->getRealPath(), 'r'),
+                'ACL' => 'public-read',
+                'ContentType'  => $contentType, // 设置检测到的 Content-Type
+            ]);
+            return [
+                'code' => 1,
+                'data' =>[
+                    'savename'=>$s3config['endpoint'].'/'.$extraFields['Bucket'].'/'.$extraFields['Key']
+                ] ,
+            ];
+        } catch (\Exception $e) {
+            return $this->createErrorResult('上传过程中发生异常: ' . $e->getMessage());
+        }
+    }
+    public function checkBucket($s3, $bucket)
+    {
+        try {
+            $buckets = $s3->listBuckets()->get('Buckets');
+            $buckets_arr = array_column($buckets, 'Name');
+            if (!in_array($bucket, $buckets_arr)) {
+                $s3->createBucket([
+                    'Bucket' => $bucket,
+                ]);
+                $policy = [
+                    'Version' => '2012-10-17',
+                    'Statement' => [
+                        [
+                            'Effect' => 'Allow',
+                            'Principal' => ['AWS' => ['*']],
+                            'Action' => [
+                                's3:GetBucketLocation',
+                                's3:ListBucket',
+                                's3:ListBucketMultipartUploads',
+                            ],
+                            'Resource' => "arn:aws:s3:::$bucket",
+                        ],
+                        [
+                            'Effect' => 'Allow',
+                            'Principal' => ['AWS' => ['*']],
+                            'Action' => [
+                                's3:DeleteObject',
+                                's3:GetObject',
+                                's3:ListMultipartUploadParts',
+                                's3:PutObject',
+                                's3:AbortMultipartUpload',
+                            ],
+                            'Resource' => "arn:aws:s3:::$bucket/*",
+                        ],
+                    ],
+                ];
+                $s3->putBucketPolicy([
+                    'Bucket' => $bucket,
+                    'Policy' => json_encode($policy),
+                ]);
+            }
+            return true;
+        } catch (\Exception $e) {
+            Log::info('checkBucket error:' . $e->getMessage());
+            return false;
+        }
+
+    }
+    /**
+     * 创建错误结果数组
+     *
+     * @param string $message 错误信息
+     * @return array 错误结果
+     */
+    private function createErrorResult(string $message): array
+    {
+        return [
+            'code' => 0,
+            'error' => $message
+        ];
+    }
+}