feat(cos): 接入 COS 直传预签名 + 词云结果图转存

package-lock.json

@@ -22,6 +22,7 @@
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         "class-transformer": "^0.5.1",
         "class-validator": "^0.14.1",
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         "exceljs": "^4.4.0",
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@@ -3040,6 +3089,87 @@
         "url": "https://opencollective.com/express"
       }
     },
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
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+      "bin": {
+        "fxparser": "src/cli/cli.js"
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+    "node_modules/cos-nodejs-sdk-v5": {
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+      "dependencies": {
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+      "license": "Apache-2.0",
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+        "mime-types": "~2.1.19",
+        "oauth-sign": "~0.9.0",
+        "performance-now": "^2.1.0",
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+        "tough-cookie": "~4.1.4",
+        "tunnel-agent": "^0.6.0"
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+      "engines": {
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@@ -3150,6 +3280,18 @@
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     },
+    "node_modules/sshpk": {
+      "version": "1.18.0",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.18.0.tgz",
+      "integrity": "sha512-2p2KJZTSqQ/I3+HX42EpYOa2l3f8Erv8MWKsy2I9uf4wA7yFIkXRffYdsx86y6z4vHtV8u7g+pPlr8/4ouAxsQ==",
+      "license": "MIT",
+      "dependencies": {
+        "asn1": "~0.2.3",
+        "assert-plus": "^1.0.0",
+        "bcrypt-pbkdf": "^1.0.0",
+        "dashdash": "^1.12.0",
+        "ecc-jsbn": "~0.1.1",
+        "getpass": "^0.1.1",
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
+        "tweetnacl": "~0.14.0"
+      },
+      "bin": {
+        "sshpk-conv": "bin/sshpk-conv",
+        "sshpk-sign": "bin/sshpk-sign",
+        "sshpk-verify": "bin/sshpk-verify"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/standard-as-callback": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/standard-as-callback/-/standard-as-callback-2.1.0.tgz",
@@ -6709,6 +7017,18 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/strnum": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/strnum/-/strnum-1.1.2.tgz",
+      "integrity": "sha512-vrN+B7DBIoTTZjnPNewwhx6cBA/H+IS7rfW68n7XxC1y7uoiGQBxaKzqucGUgavX15dJgiGztLJ8vxuEzwqBdA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/strtok3": {
       "version": "10.3.5",
       "resolved": "https://registry.npmjs.org/strtok3/-/strtok3-10.3.5.tgz",
@@ -6995,6 +7315,30 @@
         "url": "https://github.com/sponsors/Borewit"
       }
     },
+    "node_modules/tough-cookie": {
+      "version": "4.1.4",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.1.4.tgz",
+      "integrity": "sha512-Loo5UUvLD9ScZ6jh8beX1T6sO1w2/MpCRpEP7V280GKMVUQ0Jzar2U3UJPsrdbziLEMMhu3Ujnq//rhiFuIeag==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "psl": "^1.1.33",
+        "punycode": "^2.1.1",
+        "universalify": "^0.2.0",
+        "url-parse": "^1.5.3"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/tough-cookie/node_modules/universalify": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.2.0.tgz",
+      "integrity": "sha512-CJ1QgKmNg3CwvAv/kOFmtnEN05f0D/cn9QntgNOQlQF9dgvVTHj3t+8JPdjqawCHk7V/KA+fbUqzZ9XWhcqPUg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4.0.0"
+      }
+    },
     "node_modules/traverse": {
       "version": "0.3.9",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.9.tgz",
@@ -7217,6 +7561,24 @@
       "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
       "license": "0BSD"
     },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/tweetnacl": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+      "integrity": "sha512-KXXFFdAbFXY4geFIwoyNK+f5Z1b7swfXABfL7HXCmoIWMKU3dmS26672A4EeQtDzLKy7SXmfBu51JolvEKwtGA==",
+      "license": "Unlicense"
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -7444,6 +7806,16 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/url-parse": {
+      "version": "1.5.10",
+      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz",
+      "integrity": "sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==",
+      "license": "MIT",
+      "dependencies": {
+        "querystringify": "^2.1.1",
+        "requires-port": "^1.0.0"
+      }
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -7494,6 +7866,26 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
+    "node_modules/verror/node_modules/core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha512-3lqz5YjWTYnW6dlDa5TLaTCcShfar1e40rmcJVwCBJC6mWlFuj0eCHIElmG1g5kyuJ/GD+8Wn4FFCcz4gJPfaQ==",
+      "license": "MIT"
+    },
     "node_modules/watchpack": {
       "version": "2.5.2",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.5.2.tgz",

package.json

@@ -34,6 +34,7 @@
     "bullmq": "^5.0.0",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",
+    "cos-nodejs-sdk-v5": "^3.0.0",
     "dayjs": "^1.11.0",
     "exceljs": "^4.4.0",
     "ioredis": "^5.4.0",

src/cos/cos.module.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { CosService } from './cos.service';
+
+@Module({
+  providers: [CosService],
+  exports: [CosService],
+})
+export class CosModule {}

src/cos/cos.service.ts

@@ -0,0 +1,65 @@
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import COS from 'cos-nodejs-sdk-v5';
+
+/**
+ * 腾讯云 COS 封装。
+ * 用途：
+ *  - 给小程序签发预签名 PUT URL 直传（小程序不持有永久密钥）；
+ *  - 后端服务端写入（把 wordcloud 结果图转存到 COS）。
+ * 未配置（COS_SECRET_ID/KEY/BUCKET 为空）时 configured=false，调用方返回结构化“未配置”。
+ */
+@Injectable()
+export class CosService {
+  private readonly client: COS | null;
+
+  constructor(private readonly config: ConfigService) {
+    const secretId = this.config.get<string>('cos.secretId') ?? '';
+    const secretKey = this.config.get<string>('cos.secretKey') ?? '';
+    this.client = secretId && secretKey ? new COS({ SecretId: secretId, SecretKey: secretKey }) : null;
+  }
+
+  private get bucketName(): string {
+    return this.config.get<string>('cos.bucket') ?? '';
+  }
+
+  private get regionName(): string {
+    return this.config.get<string>('cos.region') ?? 'ap-guangzhou';
+  }
+
+  get configured(): boolean {
+    return !!this.client && !!this.bucketName;
+  }
+
+  private bucket(): string {
+    if (!this.bucketName) throw new Error('COS 未配置 bucket');
+    return this.bucketName;
+  }
+
+  /** 签发小程序直传预签名 PUT URL */
+  getPresignedPutUrl(key: string, expires = 600): Promise<string> {
+    return new Promise((resolve, reject) => {
+      if (!this.client) return reject(new Error('COS 未配置'));
+      this.client.getObjectUrl(
+        { Bucket: this.bucket(), Region: this.regionName, Key: key, Sign: true, Method: 'put', Expires: expires },
+        (err, data) => (err ? reject(err) : resolve(data.Url)),
+      );
+    });
+  }
+
+  /** 服务端写入对象（转存 wordcloud 结果等） */
+  putObject(key: string, body: Buffer, contentType: string): Promise<void> {
+    return new Promise((resolve, reject) => {
+      if (!this.client) return reject(new Error('COS 未配置'));
+      this.client.putObject(
+        { Bucket: this.bucket(), Region: this.regionName, Key: key, Body: body, ContentType: contentType },
+        (err) => (err ? reject(err) : resolve()),
+      );
+    });
+  }
+
+  /** 公网访问地址（桶公共读时可直接访问） */
+  publicUrl(key: string): string {
+    return `https://${this.bucketName || this.bucket()}.cos.${this.regionName}.myqcloud.com/${key}`;
+  }
+}

src/upload/upload.module.ts

@@ -1,8 +1,10 @@
 import { Module } from '@nestjs/common';
 import { UploadController } from './upload.controller';
 import { UploadService } from './upload.service';
+import { CosModule } from '../cos/cos.module';
 
 @Module({
+  imports: [CosModule],
   controllers: [UploadController],
   providers: [UploadService],
 })

src/upload/upload.service.ts

@@ -1,21 +1,25 @@
 import { Injectable } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
+import { CosService } from '../cos/cos.service';
 
-// 腾讯云 COS 上传服务（本轮仅提供签名/直传凭证占位，完整实现留后续）
+// 上传凭证服务：给小程序签发 COS 直传预签名 URL；未配置时返回结构化“未配置”
 @Injectable()
 export class UploadService {
-  constructor(private readonly config: ConfigService) {}
+  constructor(
+    private readonly config: ConfigService,
+    private readonly cos: CosService,
+  ) {}
 
-  /** 生成小程序直传所需的临时密钥 / 预签名 URL（占位） */
+  /** 小程序直传：签发 COS 预签名 PUT URL（小程序不持有永久密钥） */
   async getUploadCredentials(key: string) {
-    // TODO: 通过 COS STS 或预签名 URL 生成临时凭证
+    const bucket = this.config.get<string>('cos.bucket') ?? '';
-    //（SDK 已移除，接入时见 docs/cos-sdk-removal.md）
+    const region = this.config.get<string>('cos.region') ?? 'ap-guangzhou';
-    return {
+
-      key,
+    if (!this.cos.configured) {
-      bucket: this.config.get<string>('cos.bucket'),
+      return { key, bucket, region, presignedUrl: null, configured: false };
-      region: this.config.get<string>('cos.region'),
+    }
-      // 占位：实际应返回临时 SecretId/SecretKey/Token 或 presigned URL
+
-      credentials: null,
+    const presignedUrl = await this.cos.getPresignedPutUrl(key);
-    };
+    return { key, bucket, region, presignedUrl, configured: true };
   }
 }

src/wordcloud/wordcloud.module.ts

@@ -1,8 +1,10 @@
 import { Module } from '@nestjs/common';
 import { WordCloudController } from './wordcloud.controller';
 import { WordCloudService } from './wordcloud.service';
+import { CosModule } from '../cos/cos.module';
 
 @Module({
+  imports: [CosModule],
   controllers: [WordCloudController],
   providers: [WordCloudService],
 })

src/wordcloud/wordcloud.service.ts

@@ -3,6 +3,7 @@ import { ConfigService } from '@nestjs/config';
 import axios from 'axios';
 import ExcelJS from 'exceljs';
 import { PrismaService } from '../prisma/prisma.service';
+import { CosService } from '../cos/cos.service';
 
 type RemoteStatus = 'queued' | 'running' | 'success' | 'failed';
 
@@ -25,6 +26,7 @@ export class WordCloudService {
   constructor(
     private readonly config: ConfigService,
     private readonly prisma: PrismaService,
+    private readonly cos: CosService,
   ) {}
 
   /** 词云平台是否已配置（WORDCLOUD_API_URL 非空） */
@@ -184,10 +186,22 @@ export class WordCloudService {
     };
   }
 
-  /** 下载 wordcloud 结果 PNG 并返回小程序可用地址（COS 转存前置，P1 实现） */
+  /** 下载 wordcloud 结果 PNG 转存 COS，返回小程序可访问的 COS 公网 URL；COS 未配置时返回空 */
-  private async resolveResultImage(_remoteJobId: string): Promise<string | null> {
+  private async resolveResultImage(remoteJobId: string): Promise<string | null> {
-    // TODO(P1 COS)：GET /api/jobs/{id}/result → 下载 png → 写入 COS → 返回公网 URL。
+    if (!this.cos.configured) {
-    // 当前 COS 写入尚未实现，结果图地址留待 P1 接入。
+      return null;
-    return null;
+    }
+    try {
+      const res = await axios.get(`${this.apiUrl}/api/jobs/${remoteJobId}/files/png`, {
+        responseType: 'arraybuffer',
+        timeout: this.timeoutMs,
+      });
+      const key = `uploads/wordcloud/${remoteJobId}.png`;
+      await this.cos.putObject(key, Buffer.from(res.data), 'image/png');
+      return this.cos.publicUrl(key);
+    } catch (e) {
+      this.logger.warn(`转存词云结果失败: ${(e as Error).message}`);
+      return null;
+    }
   }
 }