Question

from __future__ import division # if using python 2
import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(1e30, 1e33, 1001)
y = x**(-1/3)*(1.102*10**20)*(1-(x**(4/3)*2.424*10**(-45)))**(1/2)
plt.plot(x,y)

plt.xlabel("M(g)", fontsize =13)
plt.ylabel("R(cm)", fontsize=13)
plt.show()

在运行上面的代码时，两个控件都没有进入var http = require('http'); var url = require('url'); var server = http.createServer(function(request, response) { http.get('http://nodejs.org/dist/index.json', (res) => { response.write("Inside http"); response.end(); }).on('error', function(e) { console.log(e); }); }); server.listen(3000);内部，也没有引发任何错误。我在这里错过了捕获错误的内容吗？

注意：服务器创建于3000

Answer 1

在您的应用中添加应用级错误处理程序。如果出现任何问题，它将捕获错误

process.on('uncaughtException', function (err) {
  // This should not happen
  logger.error("Pheew ....! Something unexpected happened. This should be handled more gracefully. I am sorry. The culprit is: ", err);
});

Answer 2

似乎应该按照以下方式放置http.get以使其正常工作：

var http = require('http');
console.log('Before server');
var server = http.createServer(function(request, response) {
  console.log('Request received');
});
server.listen(3000, function() {
  http.get('http://nodejs.org/dist/index.json', (res) => {
    console.log('Inside http');
  })
  .on('error', (e) => {
    console.error(`Got error: ${e.message}`);
  });
});

Node JS中http.get请求的错误处理

2 个答案: