Sometimes in web development, we encounter various errors, one of which, especially when working with APIs, is the CORSRequestNotHttp error. This error usually arises due to the security limitations of browsers and indicates that your request is unauthorized. Let's explore the causes and potential solutions to resolve this error.
The simplest and most common cause of this error can be due to sending a request from the 'http' protocol to an 'https' one. For example, if the services you are requesting from use the 'https' protocol, you must ensure that your request is also from 'https'.
Web pages that are currently under development should be using either 'http' or 'https'. If not, the likelihood of encountering this error will increase. Such situations often occur when the pages themselves may run in a local development environment and do not use appropriate methods for providing services.
Another potential reason could be due to security tokens that are used for authentication, which may not be correctly configured. In many cases, providing 'CORS Headers' on the server side may solve this issue.
The last solution is to inspect browser extensions and firewall settings that might be causing this error due to restrictive configurations. Ensure that appropriate settings for access and protocols are taken into account.
Sample Code to Resolve CORS Issues
fetch('https://api.example.com/data', {
method: 'GET',
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json'
}
})
.then(response => {
if (!response.ok) {
throw new Error('Network response was not ok');
}
return response.json();
})
.then(data => console.log(data))
.catch(error => console.error('There has been a problem with your fetch operation:', error));
Line-by-Line Explanation of the Code
fetch('https://api.example.com/data', {Request fetch to receive data from the specified URL.
method: 'GET',Specifying the HTTP method as 'GET'.
headers: {Defining headers that will be sent along with the request.
'Content-Type': 'application/json',Specifying the data type intended to be 'application/json'.
'Accept': 'application/json'Header indicating the response received should be of type 'JSON'.
}End of headers definition.
response => {Handling the response management from the server.
if (!response.ok) {Checking the response status and confirming its correctness.
throw new Error('Network response was not ok');In case of an error, processing the error handling part.
return response.json();Converting response to JSON format and returning it.
}End of condition.
data => console.log(data)Displaying the received data in the console.
catch(error => console.error(...))Handling errors and displaying error messages if an error occurs.