Question

我用这本书来构建我的第一个基于NodeJS的NLU应用程序，它可以完美运行：http://www.redbooks.ibm.com/redbooks.nsf/redbookabstracts/sg248398.html?Open

但是我被困在将JSON响应保存到文件中...

我有一个处理调用的js文件（articleServices.js），首先定义参数

var parameters = {
   "url": req.body.url,
   "features": {
     "entities": {
       "model": "c9c18e41-2f36-4ee5-ad59-9a3b3243c513"
     },
     "relations": {
       "model": "c9c18e41-2f36-4ee5-ad59-9a3b3243c513"
     }
   }
 };

...并将此参数调用给Watson做到了神奇...

var parameters = {
   "url": req.body.url,
   "features": {
     "entities": {
       "model": "c9c18e41-2f36-4ee5-ad59-9a3b3243c513"
     },
     "relations": {
       "model": "c9c18e41-2f36-4ee5-ad59-9a3b3243c513"
     }
   }
 };

...并全部嵌套在其中：

exports.extractArticleAuthorNames = function(req, callback){ ... }

作为非开发人员，我的逻辑指向我嵌套代码以将json文件保存在该文件中，该文件将定义响应的路径。所以我写了这个文件（author.js）：

之前：

var express = require('express');
 var router = express.Router();
 var articleServices = require('../services/articleServices');

 router.post('/', function(req, res) {
     articleServices.extractArticleAuthorNames(req, function(err, response) {
     if (err)
     res.status(500).send('error: ' + err);
     else
     res.send(response)
     });
 });
 module.exports = router;

之后

 var express = require('express');
 var router = express.Router();
 var articleServices = require('../services/articleServices');
 var fs = require('fs');

 router.post('/', function(req, res) {
     articleServices.extractArticleAuthorNames(req, function(err, response) {
     if (err)
     res.status(500).send('error: ' + err);
     else
     res.send(response)
     });

 var jsonData = ("../author");

 fs.writeFile("../test/primo.json", jsonData, (error) => { 
   if(erro) {
     throw erro;
   }
   console.log("Worked");
  });
 });
 module.exports = router;

而且...没有用：-（

错误日志：

ReferenceError：响应未定义

at /home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/routes/author.js:16:17
at Layer.handle [as handle_request] (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/layer.js:95:5)
at next (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/layer.js:95:5)
at /home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/index.js:281:22
at Function.process_params (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/index.js:335:12)
at next (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/index.js:275:10)
at Function.handle (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/index.js:174:3)
at router (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/router/index.js:47:12)

（节点：21477）UnhandledPromiseRejectionWarning：错误：发送标头后无法设置标头。

at validateHeader (_http_outgoing.js:491:11)
at ServerResponse.setHeader (_http_outgoing.js:498:3)
at ServerResponse.header (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/response.js:767:10)
at ServerResponse.send (/home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/express/lib/response.js:170:12)
at /home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/routes/author.js:11:18
at /home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/services/articleServices.js:34:5
at /home/luizc/Área de Trabalho/code_projs/JurisPrimo_Dev/node_modules/watson-developer-cloud/node_modules/ibm-cloud-sdk-core/lib/requestwrapper.js:259:9
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:189:7)

（节点：21477）UnhandledPromiseRejectionWarning：未处理的承诺拒绝。引发此错误的原因可能是抛出了一个没有catch块的异步函数，或者是拒绝了一个.catch（）无法处理的承诺。（拒绝ID：1）

（节点：21477）[DEP0018] DeprecationWarning：已弃用未处理的承诺拒绝。将来，未处理的承诺拒绝将以非零退出代码终止Node.js进程。

======================================

你们伙计们可以给我提示解决这个问题吗？

非常感谢！

NOOB问题：如何保存来自Watson NLU的JSON响应

0 个答案: