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我正在关注此处找到的“Watson Node.js 快速入门” ，但使用他们提供的 npm 命令安装 Watson Developer Cloud Node.js 包装程序包时遇到问题。

这是输出： npm 命令后的 cmd 输出

之后，运行该命令的目录中不会出现任何文件。有人对如何安装 Watson Developer Cloud 包装器以开始通过 Bluemix 使用 Node.js 开发 Watson 应用程序有任何建议吗？

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3 回答 3

3

彼得，

您所指的页面版本已在三个多月前完全重写。重写应该解决您遇到的问题。它似乎在同一个 URL 上可用：

http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/getting_started/gs-quick-nodejs.shtml

我不确定您为什么会看到该页面的旧版本。也许它是您缓存中的旧版本？请尝试刷新页面，看看是否有帮助。

于 2015-10-15T21:11:48.200 回答
2

好的，所以文档页面存在很多问题。我在下面列出了它们以及解决方案。在解决了以下缺点后，我能够使示例正常工作。

  • 机器翻译服务不存在- 在新的事物方案中，机器翻译服务现在是语言翻译服务。
  • 服务凭证适用于不正确的 API 版本- 您获得的服务凭证对象适用于 API 的 v2 版本，而不是示例源代码中提到的 v1。

  • 示例中的源代码使用完全过时的请求参数- 请参阅下面更新的源代码。

    var watson = require('watson-developer-cloud');

    var machine_translation = watson.language_translation({
  username: 'user_name',
  password: 'password',
  version: 'v2'
});

//the attributes from and to in the example provided are actually replaced by source and target
machine_translation.translate({
  text: 'A sentence must have a verb', source : 'enus', target: 'eses' },
  function (err, response) {
    if (err)
      console.log('error:', err);
    else
      console.log(JSON.stringify(response, null, 2));
});

希望这可以解决您的问题。当然，示例中显示的代码只是一个入门代码——如果您想开发一个复杂的应用程序，那么您需要引入其他依赖项，例如 expressjs、jade 等，然后显式地实现这些。

如果您想参考此服务的 Github 存储库示例，请访问此链接。

于 2015-10-14T17:47:52.163 回答
0

彼得，

npm 命令应该在包含 Watson 包装器 API 的目录中创建了一个 nodes_module。您仍然需要编写一个主要的 Node.js 文件来调用 API。下面的示例是一个使用 Language Translation Watson 服务的 Node.js 文件：

var express = require('express');
var app = express();

app.get('/', function (req, res) {
  res.send('Hello World!');
});

var watson = require('watson-developer-cloud');

var language_translation = watson.language_translation({
  username: '<username>',
  password: '<password>',
  version: 'v2'
});

language_translation.translate({
  text: 'A sentence must have a verb', source : 'en', target: 'es' },
  function (err, translation) {
    if (err)
      console.log('error:', err);
    else
      console.log(JSON.stringify(translation, null, 2));
});

language_translation.identify({
  text: 'The language translation service takes text input and identifies the language used.' },
  function (err, language) {
    if (err)
      console.log('error:', err);
    else
      console.log(JSON.stringify(language, null, 2));
});


var server = app.listen(3000, function () {
  var host = server.address().address;
  var port = server.address().port;

  console.log('Example app listening at http://%s:%s', host, port);
});

它需要 express，因此您必须首先安装 express 并运行 Node.js 应用程序（假设您将上面的文件保存为 app.js，您还需要按照以下文章中的说明输入 Watson 服务用户名和密码） ：

npm install express
node app.js

输出类似于：

Example app listening at http://:::3000
{
  "translations": [
    {
      "translation": "Una sentencia debe tener un verbo"
    }
  ],
  "word_count": 6,
  "character_count": 27
}
{
  "languages": [
    {
      "language": "en",
      "confidence": 0.913647
    },
    {
      "language": "id",
      "confidence": 0.0323458
    },
    {
      "language": "sv",
      "confidence": 0.0156442
    },
    {
      "language": "fi",
      "confidence": 0.011028
    },
    {
      "language": "is",
      "confidence": 0.00709899
    },
    {
      "language": "nn",
      "confidence": 0.00553699
    },
    {
      "language": "ht",
      "confidence": 0.00408621
    },
    {
      "language": "et",
      "confidence": 0.00119016
    },
    {
      "language": "lv",
      "confidence": 0.00115617
    },
    {
      "language": "de",
      "confidence": 0.00114441
    },
    {
      "language": "tr",
      "confidence": 0.00111117
    },
    {
      "language": "ro",
      "confidence": 0.000802137
    },
    {
      "language": "lt",
      "confidence": 0.000801177
    },
    {
      "language": "cs",
      "confidence": 0.000613459
    },
    {
      "language": "sq",
      "confidence": 0.000474419
    },
    {
      "language": "ku",
      "confidence": 0.000468358
    },
    {
      "language": "bs",
      "confidence": 0.000452145
    },
    {
      "language": "sk",
      "confidence": 0.000396557
    },
    {
      "language": "nb",
      "confidence": 0.000324082
    },
    {
      "language": "hu",
      "confidence": 0.000292984
    },
    {
      "language": "fr",
      "confidence": 0.000289142
    },
    {
      "language": "da",
      "confidence": 0.000274609
    },
    {
      "language": "eo",
      "confidence": 0.000194707
    },
    {
      "language": "eu",
      "confidence": 0.000167031
    },
    {
      "language": "vi",
      "confidence": 0.000147763
    },
    {
      "language": "az",
      "confidence": 0.000121994
    },
    {
      "language": "af",
      "confidence": 0.000111069
    },
    {
      "language": "nl",
      "confidence": 0.0000278278
    },
    {
      "language": "pl",
      "confidence": 0.0000243381
    },
    {
      "language": "pt",
      "confidence": 0.0000127483
    },
    {
      "language": "es",
      "confidence": 0.0000112067
    },
    {
      "language": "ja",
      "confidence": 0.0000018683
    },
    {
      "language": "it",
      "confidence": 5.87651e-7
    },
    {
      "language": "ko",
      "confidence": 4.27166e-7
    },
    {
      "language": "zh",
      "confidence": 1.33964e-7
    },
    {
      "language": "zh-TW",
      "confidence": 6.36584e-8
    },
    {
      "language": "el",
      "confidence": 3.10395e-8
    },
    {
      "language": "hi",
      "confidence": 1.61209e-8
    },
    {
      "language": "ur",
      "confidence": 3.72468e-9
    },
    {
      "language": "mn",
      "confidence": 3.26788e-9
    },
    {
      "language": "ru",
      "confidence": 2.58127e-9
    },
    {
      "language": "he",
      "confidence": 1.91823e-9
    },
    {
      "language": "km",
      "confidence": 1.60638e-9
    },
    {
      "language": "ar",
      "confidence": 1.18306e-9
    },
    {
      "language": "pa",
      "confidence": 1.16591e-9
    },
    {
      "language": "bn",
      "confidence": 9.64752e-10
    },
    {
      "language": "so",
      "confidence": 9.41827e-10
    },
    {
      "language": "ka",
      "confidence": 7.88174e-10
    },
    {
      "language": "uk",
      "confidence": 5.64222e-10
    },
    {
      "language": "ps",
      "confidence": 3.55452e-10
    },
    {
      "language": "ky",
      "confidence": 3.32569e-10
    },
    {
      "language": "fa",
      "confidence": 2.74777e-10
    },
    {
      "language": "ta",
      "confidence": 2.7293e-10
    },
    {
      "language": "be",
      "confidence": 2.71734e-10
    },
    {
      "language": "bg",
      "confidence": 2.33392e-10
    },
    {
      "language": "te",
      "confidence": 2.0307e-10
    },
    {
      "language": "ml",
      "confidence": 1.92155e-10
    },
    {
      "language": "kk",
      "confidence": 1.67796e-10
    },
    {
      "language": "hy",
      "confidence": 1.42515e-10
    },
    {
      "language": "gu",
      "confidence": 1.21276e-10
    },
    {
      "language": "ba",
      "confidence": 6.74764e-11
    },
    {
      "language": "cv",
      "confidence": 4.22054e-11
    }
  ]
}
于 2015-10-14T17:49:22.560 回答