Why is my xmlhttprequest().status 404 even though the url exists?

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I am trying to build a weather app as a project for FreeCodeCamp. When I type in my url in my browser, it outputs the data. However, my status is still 404 even though my readyState is 4.

This is the code.

JavaScript

var APPID = "85b5c033328a263ce0ee20b8a0b4ac30";
var temperature;
var weather;
var windSpeed;
var direction;

function getData(latitude, longitude) {
    var url = "api.openweathermap.org/data/2.5/weather?lat=" + latitude + "&lon=" + longitude + "&APPID=" + APPID + "&callback=JSON_CALLBACK";
    sendRequest(url);
}

function sendRequest(url) {
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() {
        console.log("state " + xmlhttp.readyState);
        console.log("status " + xmlhttp.status);
        console.log(url);
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            var data = JSON.parse(xmlhttp.responseText);
            weather = {};
            weather.name = data.name;
            weather.temperature = data.main.temp;
            weather.wind = data.wind.speed;
        }
    };
    xmlhttp.open("GET", url, true);
    xmlhttp.send();
}

function update(weather) {
    temperature.innerHTML = weather.temperature;
}

window.onload = function() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(function(position) {
            var lat = position.coords.latitude;
            var long = position.coords.longitude;
            getData(lat, long);
        });
    }

}

What I have tried:

I have tried changing my "&callback=JSON_CALLBACK" to "&mode=xml" but it still outputted 404.

Posted 20-Nov-16 20:51pm

Member 12861628

Updated 21-Nov-16 18:15pm

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Jochen Arndt · Answer 1 · 2016-11-20T23:41:00

Read state 4 indicates that you got an response which is 404 (not found) in your case. It tells you that the server at api.openweathermap.org is working (the 404 answer is from there) but that the local part of the URL is invalid.

Did you had a look at the 404 message in xmlhttp.responseText?
It should give you a hint about which part is invalid.

According to Current weather data- OpenWeatherMap[^] the default format is Jason and callback defines a JavaScript call back function which must be implemented. So there should be no need to use the callback or mode parameter.

You may also try it with just the lat and lon parameters, and - because it works in the browser - by using the URL entered in the browser for testing (that is setting your url variable to that fixed string).

Try also using a lower case appid parameter (parameters may be case sensitive).

See also this support thread (especially the post from Ivan Sep 15, 2015 03:51PM UTC): OpenWeatherMap | Error: Not found city[^]

Member 12861628 · Answer 2 · 2016-11-21T18:15:00

Solution 2

I figured out the solution. In the URL I needed to add http:// to the front of the url.

Posted 21-Nov-16 18:15pm