javascript - TypeError: Only absolute URLs are supported using env file with fetch - Stack Overflow

admin管理员组

文章数量:1025477

I'm trying to use node-fetch to do a GET request. I'm using dotenv to take the url, but the fetch retrieve me TypeError: Only absolute URLs are supported, the URL_ENV variable isn't undefined

require('dotenv').config();
let url = process.env.URL_ENV;
        fetch(url ,{method: 'GET'}).then(response => {
            return response.json() 
         })

I'm trying to use node-fetch to do a GET request. I'm using dotenv to take the url, but the fetch retrieve me TypeError: Only absolute URLs are supported, the URL_ENV variable isn't undefined

require('dotenv').config();
let url = process.env.URL_ENV;
        fetch(url ,{method: 'GET'}).then(response => {
            return response.json() 
         })

If I change the url variable with the content of the URL_ENVinside the .env file it works

let url = "http://192.168.1.140:8080"
        fetch(url,{method: 'GET'}).then(response => {
            return response.json()
        })

• javascript
• node.js
• dotenv

Share Improve this question Follow asked May 23, 2019 at 12:16 SMattiaSMattia 4911 gold badge11 silver badge66 bronze badges 8

• 1 Wele to Stack Overflow! Could you clarify you question? What is not working? What behavior do you expect? – Maris B. Commented May 23, 2019 at 12:22
• Thanks for you interest. I can't understand why putting the same url, in different way, I have two different behaviors. I'm expect that also with the env variable, the first snippet of code, the fetch works. – SMattia Commented May 23, 2019 at 13:53
• 1 Have you tried to check value of process.env.URL_ENV at run-time? Try to use Console.log() or similar method to find out the actual value. As the error says, it must be an absolute URL. – Maris B. Commented May 24, 2019 at 8:35
• Yes I have tried, http://192.168.1.140:8080 is printed – SMattia Commented May 24, 2019 at 9:01
• 3 If the code is not working with process.env.URL_ENV and suddenly works when you replace it with string literal http://192.168.1.140:8080 then there may be some unnecessary characters like spaces, tabs, newlines, etc.? – Maris B. Commented May 24, 2019 at 9:47

 |  Show 3 more ments

1 Answer 1

Sorted by: Reset to default 1

Do you have mas or semicolon symbols at the end of your lines in .env file? If you do, remove them and it should work

I'm trying to use node-fetch to do a GET request. I'm using dotenv to take the url, but the fetch retrieve me TypeError: Only absolute URLs are supported, the URL_ENV variable isn't undefined

require('dotenv').config();
let url = process.env.URL_ENV;
        fetch(url ,{method: 'GET'}).then(response => {
            return response.json() 
         })

I'm trying to use node-fetch to do a GET request. I'm using dotenv to take the url, but the fetch retrieve me TypeError: Only absolute URLs are supported, the URL_ENV variable isn't undefined

require('dotenv').config();
let url = process.env.URL_ENV;
        fetch(url ,{method: 'GET'}).then(response => {
            return response.json() 
         })

If I change the url variable with the content of the URL_ENVinside the .env file it works

let url = "http://192.168.1.140:8080"
        fetch(url,{method: 'GET'}).then(response => {
            return response.json()
        })

• javascript
• node.js
• dotenv

Share Improve this question Follow asked May 23, 2019 at 12:16 SMattiaSMattia 4911 gold badge11 silver badge66 bronze badges 8

• 1 Wele to Stack Overflow! Could you clarify you question? What is not working? What behavior do you expect? – Maris B. Commented May 23, 2019 at 12:22
• Thanks for you interest. I can't understand why putting the same url, in different way, I have two different behaviors. I'm expect that also with the env variable, the first snippet of code, the fetch works. – SMattia Commented May 23, 2019 at 13:53
• 1 Have you tried to check value of process.env.URL_ENV at run-time? Try to use Console.log() or similar method to find out the actual value. As the error says, it must be an absolute URL. – Maris B. Commented May 24, 2019 at 8:35
• Yes I have tried, http://192.168.1.140:8080 is printed – SMattia Commented May 24, 2019 at 9:01
• 3 If the code is not working with process.env.URL_ENV and suddenly works when you replace it with string literal http://192.168.1.140:8080 then there may be some unnecessary characters like spaces, tabs, newlines, etc.? – Maris B. Commented May 24, 2019 at 9:47

 |  Show 3 more ments

1 Answer 1

Sorted by: Reset to default 1

Do you have mas or semicolon symbols at the end of your lines in .env file? If you do, remove them and it should work

本文标签： javascriptTypeError Only absolute URLs are supported using env file with fetchStack Overflow