这是他们的示例代码：
const dialogflow = require('dialogflow');
const uuid = require('uuid');
/**
* Send a query to the dialogflow agent, and return the query result.
* @param {string} projectId The project to be used
*/
async function runSample(projectId = 'your-project-id') {
// A unique identifier for the given session
const sessionId = uuid.v4();
// Create a new session
const sessionClient = new dialogflow.SessionsClient();
const sessionPath = sessionClient.sessionPath(projectId, sessionId);
// The text query request.
const request = {
session: sessionPath,
queryInput: {
text: {
// The query to send to the dialogflow agent
text: 'hello',
// The language used by the client (en-US)
languageCode: 'en-US',
},
},
};
// Send request and log result
const responses = await sessionClient.detectIntent(request);
console.log('Detected intent');
const result = responses[0].queryResult;
console.log(` Query: ${result.queryText}`);
console.log(` Response: ${result.fulfillmentText}`);
if (result.intent) {
console.log(` Intent: ${result.intent.displayName}`);
} else {
console.log(` No intent matched.`);
}
}
并且此代码根本不起作用，给出错误：无法加载默认凭据：
2019-03-21T16:59:40.099101+00:00 app[web.1]: Message: hi Bilal
2019-03-21T16:59:40.102561+00:00 app[web.1]: (node:23) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to https://cloud.google.com/docs/authentication/getting-started for more information.
2019-03-21T16:59:40.102565+00:00 app[web.1]: at GoogleAuth.<anonymous> (/app/web/node_modules/google-auth-library/build/src/auth/googleauth.js:168:23)
2019-03-21T16:59:40.102568+00:00 app[web.1]: at Generator.next (<anonymous>)
2019-03-21T16:59:40.102570+00:00 app[web.1]: at fulfilled (/app/web/node_modules/google-auth-library/build/src/auth/googleauth.js:19:58)
2019-03-21T16:59:40.102572+00:00 app[web.1]: at process._tickCallback (internal/process/next_tick.js:68:7)
2019-03-21T16:59:40.102691+00:00 app[web.1]: (node:23) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
2019-03-21T16:59:40.102784+00:00 app[web.1]: (node:23) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
2019-03-21T16:59:55.986568+00:00 app[web.1]: Message: hi Bilal
2019-03-21T16:59:55.986595+00:00 app[web.1]: (node:23) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to https://cloud.google.com/docs/authentication/getting-started for more information.
2019-03-21T16:59:55.986598+00:00 app[web.1]: at GoogleAuth.<anonymous> (/app/web/node_modules/google-auth-library/build/src/auth/googleauth.js:168:23)
2019-03-21T16:59:55.986600+00:00 app[web.1]: at Generator.next (<anonymous>)
2019-03-21T16:59:55.986602+00:00 app[web.1]: at fulfilled (/app/web/node_modules/google-auth-library/build/src/auth/googleauth.js:19:58)
2019-03-21T16:59:55.986605+00:00 app[web.1]: at process._tickCallback (internal/process/next_tick.js:68:7)
2019-03-21T16:59:55.986647+00:00 app[web.1]: (node:23) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
他们有如何在回购中使用这个库的说明，但它没有意义https://github.com/googleapis/nodejs-dialogflow
他们没有在任何地方描述如何在调用检测意图时放置凭据，而不是在示例代码中的前夕：https://github.com/googleapis/nodejs-dialogflow/blob/master/samples/detect.js
在我的生活中，我从未见过像对话流团这样不负责任的团队
导出env变量解决了我的问题，现在我从对话框流程中得到了一些东西，但没有按照预期，可能是他们的存储库示例代码中的代码不正确
这是他们作为try an example所拥有的代码：
...
// Send request and log result
const responses = await sessionClient.detectIntent(request);
console.log('Detected intent');
const result = responses[0].queryResult;
console.log(` Query: ${result.queryText}`);
console.log(` Response: ${result.fulfillmentText}`);
if (result.intent) {
console.log(` Intent: ${result.intent.displayName}`);
} else {
console.log(` No intent matched.`);
}
...
实际上result.fulfillmentText不存在，它给了我未定义
我已经做了很多努力（请参阅下面的console.logs），只是为了理解现在它们返回responses[0].queryResult.fulfillmentText而不是responses[0].queryResult.fulfillmentMessages而不是文本字符串，但它是一个对象，其中包含更多值，您可以在console.logs中看到下面：
...
// Send request and log result
const responses = await sessionClient.detectIntent(request);
console.log('Detected intent');
console.log("responses: ", responses)
console.log("responses[0]: ", responses[0])
console.log("responses[0].queryResult: ", responses[0].queryResult)
console.log("responses[0].queryResult.fulfillmentMessages: ", responses[0].queryResult.fulfillmentMessages)
// console.log("responses[0].queryResult.fulfillmentMessages[1]: ", responses[0].queryResult.fulfillmentMessages[1])
console.log("responses[0].queryResult.fulfillmentMessages[0]: ", responses[0].queryResult.fulfillmentMessages[0])
console.log("responses[0].queryResult.fulfillmentMessages[0].text: ", responses[0].queryResult.fulfillmentMessages[0].text)
console.log("responses[0].queryResult.fulfillmentMessages[0].text.text: ", responses[0].queryResult.fulfillmentMessages[0].text.text)
console.log("responses[0].queryResult.fulfillmentMessages[0].text.text[0]: ", responses[0].queryResult.fulfillmentMessages[0].text.text[0])
var fulfilmentText = responses[0].queryResult.fulfillmentMessages[0].text.text[0]
...
google auth库正在查找名为GOOGLE_APPLICATION_CREDENTIALS的环境变量，该变量指向JSON凭据文件。
您可以按照https://dialogflow.com/docs/reference/v2-auth-setup中所述的说明下载该文件。
错误消息后面的链接提供了如何设置该环境变量的示例：https://cloud.google.com/docs/authentication/getting-started
你试过看看这个吗？您需要设置身份验证，创建服务帐户密钥作为.json然后让Google Cloud SDK处理它。
https://dialogflow.com/docs/reference/v2-auth-setup
您也可以尝试传递这样的服务帐户
// Create a new session
const sessionClient = new dialogflow.SessionsClient({keyFilename: "./service_account.json"});