Question

我试图获取使用Firebase云功能中的Google Vision API的示例，但它失败了。

我使用Github上提供的未经修改的样本：https://github.com/firebase/functions-samples/tree/master/moderate-images

修改

这是我的源文件：

＆＃13;

/**
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for t`he specific language governing permissions and
 * limitations under the License.
 */
'use strict';

const functions = require('firebase-functions');
const mkdirp = require('mkdirp-promise');
const gcs = require('@google-cloud/storage')();
const vision = require('@google-cloud/vision')();
const spawn = require('child-process-promise').spawn;
const path = require('path');
const os = require('os');
const fs = require('fs');

/**
 * When an image is uploaded we check if it is flagged as Adult or Violence by the Cloud Vision
 * API and if it is we blur it using ImageMagick.
 */
exports.blurOffensiveImages = functions.storage.object().onChange(event => {
  const object = event.data;
  const file = gcs.bucket(object.bucket).file(object.name);

  // Exit if this is a move or deletion event.
  if (object.resourceState === 'not_exists') {
    return console.log('This is a deletion event.');
  }

  // Check the image content using the Cloud Vision API.
  return vision.detectSafeSearch(file).then(data => {
    const safeSearch = data[0];
    console.log('SafeSearch results on image', safeSearch);

    if (safeSearch.adult || safeSearch.violence) {
      return blurImage(object.name, object.bucket, object.metadata);
    }
  });
});

/**
 * Blurs the given image located in the given bucket using ImageMagick.
 */
function blurImage(filePath, bucketName, metadata) {
  const tempLocalFile = path.join(os.tmpdir(), filePath);
  const tempLocalDir = path.dirname(tempLocalFile);
  const bucket = gcs.bucket(bucketName);

  // Create the temp directory where the storage file will be downloaded.
  return mkdirp(tempLocalDir).then(() => {
    console.log('Temporary directory has been created', tempLocalDir);
    // Download file from bucket.
    return bucket.file(filePath).download({destination: tempLocalFile});
  }).then(() => {
    console.log('The file has been downloaded to', tempLocalFile);
    // Blur the image using ImageMagick.
    return spawn('convert', [tempLocalFile, '-channel', 'RGBA', '-blur', '0x8', tempLocalFile]);
  }).then(() => {
    console.log('Blurred image created at', tempLocalFile);
    // Uploading the Blurred image.
    return bucket.upload(tempLocalFile, {
      destination: filePath,
      metadata: {metadata: metadata} // Keeping custom metadata.
    });
  }).then(() => {
    console.log('Blurred image uploaded to Storage at', filePath);
    fs.unlinkSync(tempLocalFile);
    console.log('Deleted local file', filePath);
  });
}

＆＃13;

我已完成以下步骤：

创建了一个有效的Firebase项目
激活Vision API和项目开票
在我的电脑上初始化Firebase功能
使用npm install
尝试使用firebase deploy

然后我收到了这个错误：

i  deploying functions
i  functions: ensuring necessary APIs are enabled...
+  functions: all necessary APIs are enabled
i  functions: preparing functions directory for uploading...

Error: Error occurred while parsing your function triggers.

TypeError: require(...) is not a function
    at Object.<anonymous> (C:\Users\xxxxxx\FirebaseTest\functions\index.js:21:47)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at C:\Users\Tobias\AppData\Roaming\npm\node_modules\firebase-tools\lib\triggerParser.js:18:11
    at Object.<anonymous> (C:\Users\xxxxxx\AppData\Roaming\npm\node_modules\firebase-tools\lib\triggerParser.js:38:3)

所以他抱怨这条线：

const vision = require('@google-cloud/vision')();

我的package.json看起来像这样：

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase serve --only functions",
    "shell": "firebase experimental:functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "@google-cloud/storage": "^1.5.2",
    "@google-cloud/vision": "^0.14.0",
    "child-process-promise": "^2.2.1",
    "firebase-admin": "^5.8.1",
    "firebase-functions": "^0.8.1",
    "mkdirp": "^0.5.1",
    "mkdirp-promise": "^5.0.1"
  },
  "private": true
}

很高兴知道：其他尝试，例如在其他功能中试用云存储触发器，与我的Firebase项目相得益彰。只有Vision API给我带来了很多麻烦。

有人可以给我一个暗示我的设置出了什么问题吗？

谢谢！

Answer 1

我在FCF中也遇到过一些令人头疼的云端视觉问题。我的工作解决方案如下：

const vision = require('@google-cloud/vision');
const visionClient =  new vision.ImageAnnotatorClient();

然后你应该能够做一些很酷的事情：

visionClient.labelDetection(someImageUri)

Answer 2

问题是您使用的是较新版本的视觉API，而不是示例代码使用的版本。示例代码提供了这些依赖项：

"@google-cloud/storage": "^0.4.0",
"@google-cloud/vision": "^0.5.0",
"child-process-promise": "^2.2.0",
"firebase-admin": "^4.1.1",
"firebase-functions": "^0.5.1",
"mkdirp": "^0.5.1",
"mkdirp-promise": "^4.0.0"

你正在使用更新的东西：

"@google-cloud/storage": "^1.5.2",
"@google-cloud/vision": "^0.14.0",
"child-process-promise": "^2.2.1",
"firebase-admin": "^5.8.1",
"firebase-functions": "^0.8.1",
"mkdirp": "^0.5.1",
"mkdirp-promise": "^5.0.1"

所以，你有两个选择。回溯依赖版本以匹配示例代码使用的内容，或更改样本以适合您要使用的版本。

在Firebase云功能中使用Google Vision API时出现TypeError

2 个答案: