405 method not allowed using Tomcat
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405 method not allowed using Tomcat
I am new to web development and having this issue for some time. I tried a lot of things that were suggested on SO and elsewhere, but no luck. Anyways, i'll explain what I am doing.
I am trying a simple exercise where I have a simple HTML page that accepts a city name and on clicking the submit button, will show me the weather of that city. The HTML code is as below:
<body>
<form>
<div>
<label for="city">City</label>
<input id="city" type="text" name="city">
</div>
<div>
<input id="submitButton" type="button" name="submitButton" value="Get weather!" onclick="send()">
</div>
</form>
<script type="text/javascript" src="CityWeather.js"></script>
</body>
This HTML file makes a call to my JS script which will handle the call to the API of OpenWeatherMap and display the results. Code for the JS is as below(please note I have purposely omitted the api_key but the actual URL does have it):
function send() {
var xhttp = new XMLHttpRequest();
xhttp.open("GET", "http://api.openweathermap.org/data/2.5/weather?q=london&APPID=<api_key>", true);
xhttp.setRequestHeader("Content-type", "application/json");
xhttp.send();
var jsonResponseText = xhttp.responseText;
//var response = JSON.parse(jsonResponseText);
console.log(xhttp.readyState);
console.log(xhttp.status);
console.log(jsonResponseText);
}
Now, when I first tried obtaining the results by just launching the HTML file, I got CORS issue and I realized that I should not be making the call to the API via the file URL(file://). So I downloaded Tomcat 9.0 and placed both, the HTML and JS files, inside the webapps folder of Tomcat. I then started Tomcat and launched the page. However, I get the exceptions mentioned below:
OPTIONS http://api.openweathermap.org/data/2.5/weather?q=london&APPID=<api_key> 405 (Method Not Allowed)
Failed to load http://api.openweathermap.org/data/2.5/weather?q=london&APPID=<api_key>: Response for preflight has invalid HTTP status code 405.
I tried updating the CATALINA_BASE/conf/web.xml file with the entries below,
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
restarted the server and tried it again but still no luck. Can someone help me by pointing what needs to be done? I am using Chrome for this exercise. I tried using IE as well but no luck.
UPDATE 1:
I tried changing the api call. Instead of using the openweathermap api, I tried using the GIT API to get my repos.
function send() {
var xhttp = new XMLHttpRequest();
xhttp.open("GET", "https://api.github.com/users/bhavyas66", true);
xhttp.setRequestHeader("Content-type", "application/json");
xhttp.send();
var jsonResponseText = xhttp.responseText;
//var response = JSON.parse(jsonResponseText);
console.log(xhttp.readyState);
console.log(xhttp.status);
console.log(jsonResponseText);
}
In this case, I didnt get the exceptions above, but the state is stuck at 1 and status printed is 0. The response is also empty. However, when I open the Chrome Network window, I can see that there is response under the Preview tab
It doesn’t matter what CORS config you do on your own server. See the comment at stackoverflow.com/questions/50518345/…. You must do the request from your backend instead. You’re making a request to the openweathermap.org API, which doesn’t handle the CORS preflight OPTIONS request right. And if when make requests to that API, you add a 'Content-Type: application/json' header to the request, that triggers browsers to send a CORS preflight OPTIONS request, which that API doesn’t handle
– sideshowbarker
Jul 2 at 13:34
1 Answer
1
try "POST" method，405 errors often appear at the same time as the POST method
I tried that as well but no luck.
– BoJack Horseman
Jul 2 at 4:38
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Why are you adding a 'Content-type: application/json' header to a GET request? Adding that header to the request has no effect other than to trigger browsers to make a CORS preflight OPTIONS request. Remove that header from your request.
– sideshowbarker
Jul 2 at 13:28