如何从天气 api 获取数据并访问它的数据

Question

I tried to get weather API data from this program,my problem is that this program's output is undefined,I expected an object,Why the output is undefined and how I can get the required object?

const url = "https://api.weatherapi.com/v1/current.json?key=KEYREDACTED&q=London"
const url1 = "https://api.openweathermap.org/data/2.5/weather?q=New Delhi,India&appid=KEYREDACTED"

const apiRequest = https.get(url,(res) => {
  let data ="";
  res.on("data",(chunk) => {
      data+=chunk;
      JSON.parse(data);
  })
  res.on("end",() => {
      console.log(data.location);
  });
});

Answer 1

Important: Never include API Keys/IDs in your question (the part after ?key= and &appid= ). Other people can use them and use up your traffic.

You are parsing data using JSON.parse while the response is still being received. Move that to the "end" part.

https.get(url,(res) => {
  let data ="";
  res.on("data",(chunk) => {
      // Data is being received in chunks, we add it to the data variable to save it
      data+=chunk;
  })
  res.on("end",() => {
    // all data has been received, now we can parse it and are done
    const parsedData = JSON.parse(data);
    console.log(parsedData);
  });
});

The parsedData is probably the object you are looking for.

Answer 2

I just would like to add to the ffritz response which is correct and say that there are npm packages that will cut your work in half or just use pure ES6 and fetch which is also super simple and makes all that conversion work for you.

 fetch('https://jsonplaceholder.typicode.com/todos/1').then(response => response.json()).then(data => console.log(data));

Here is some documentation.

https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch