How to solve the problem that vue cannot request the service and does not pop up an error message

Vue is one of the JavaScript frameworks currently being used extensively. It makes it easy to build single-page applications and integrates with many backend server-side technologies. During Vue development, if you try to send a request to the backend, but the service is not correctly requested in Vue and an error cannot pop up, you may need to find some solutions.

In this article we will explore some solutions to try to resolve situations where your Vue application encounters this issue.

View network request log

Vue uses an Ajax-like XhrHttpRequest object to make HTTP requests. You can view the details of these network requests by visiting your browser's developer console. In the console you can view the request URL and the request headers sent. If you see a 404 or 500 error in the request header, it means that the correct service cannot be requested.

Also, you can use Vue’s built-in tools to view the details of network requests. If you have used the Vue DevTools plugin, any network requests made from Vue components can be viewed in the Vue DevTools window.

Check whether the service address is correct

If you are sure that the network request has been sent, but the error still cannot pop up, you may need to check whether the address of the service endpoint is correct. Please make sure you send the real URL to the server and there are no typos or other errors in the text. You can verify that it exists by manually typing the URL into the browser address bar and trying to get to the service endpoint. If the service endpoint does not exist, you will need to change the URL or ensure the correct service is still available.

Also, you may also need to check the protocol and port number of the server URL. If you are trying to connect to a non-secure service using the HTTPS (encrypted) protocol, this may fail. You also need to make sure you are using the correct port number to connect to the service, and if the port number needs to be changed, confirm that you change it accordingly in the URL. For example, if the service port number is 8000, add ":8000" to the URL.

Check if the server is started

Vue cannot read data from a server that is not running or stopped. If you send a data request to the server in Vue, but your server has not been started, it will not be able to respond to the request. Please make sure your server is properly configured and running and try restarting the server to see if this resolves the issue.

Consider using interceptors to handle network requests

Vue provides us with some features to easily handle errors that occur when sending network requests. An interceptor is an option capable of intercepting requests and processing their responses. You can use the interceptor of Axios (the recommended HTTP library for Vue) to intercept any requests sent to the server. Handling network requests and responses is not required, but sometimes it can help you better understand how your site is running, as well as help troubleshoot some common problems.

Conclusion

In your Vue development cycle, if you face the problem of requesting services but unable to pop up an error, the solutions provided in this article may be helpful to you. First, check the network request logs and see if the request header contains a 404 or 500 error. Second, check that the address of the service endpoint is correct and that you are using the correct protocol and port number. Finally, verify that your server is properly configured and running.

If you follow these suggestions, your Vue application will be more mature and run more smoothly. At the same time, you can also be more confident when handling network requests.

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