Obtaining status codes from URLs can be achieved by leveraging various methods

Question

Obtaining status codes from URLs can be achieved by leveraging various methods

Hey there, I'm just starting out with javascript and AngularJS. Here's a function I wrote to retrieve JSON data from the server:

function getProducts() {
        return $http.get(urlProducts).then(
            //Success
            function(response) {
                products= response.data.result;
                return products;
             },
            //Error
            function(response) {
                //put best way to return an error
                return something;
            }
        );
    }

My main question is: what is the most efficient method for fetching data from a web server? I not only want to confirm if the response was successful but also check if the status code returned was 200.

In case of an error, I'd like to know the best approach to handle it (which involves displaying an image with the text "Not possible connect with the server. Try it again"). However, I am building the app with Ionic (using HTML5, CSS3, and javascript with AngularJS). So, what would be the optimal way to show an error message involving an image while working in Apache Cordova? Thanks!

javascript angularjs json cordova ionic-framework

Answer 1

Answer №1

According to the official AngularJS documentation:

The $http service is a fundamental component of Angular that aids in communication with remote HTTP servers.

When making an $http call, the response object contains various properties, including:

data – {string|Object} – The response body transformed using transform functions.

status – {number} – HTTP status code of the response, useful for conditional logic.

statusText – {string} – HTTP status text of the response.

In your example, Promise.protorype.then() is used to handle success and error scenarios once the promise is fulfilled by the $http.get call.

Here's a modified version based on your example:

function getProducts() {
    // Make the http get request
    return $http.get(url).then(

        //Success - 200 status code
        function(response) {
            products= response.data.result;
                return products;
        },

        //Error handling
        function(response) {

           // Access status property and statusText
           console.log("Http Status: " + response.status + " Description: " +   response.statusText);

           // Return false
           return false;
});

A recommended way is to utilize a library like Angular-UI-Notification for better user experience:

//Success handler function
function handle_response_success(response) {
    // Process response and show success notification
    Notification.success('Success notification');
};

// Error handler function
function handle_response_error(error) {
     Notification.error('Request failed. Details: ' + 'Http Status: ' + error.status + ' Description: ' +   error.statusText);
}

// Bind handlers to getProducts call

function getProducts() {

    // Using a cleaner approach
    return $http({ method: 'GET',
        url: 'http://example.com'
     });
};

// More elegant error handling approach
getProducts.then(handle_response_success.bind(this), handle_response_error.bind(this));

Answer 2

According to the official AngularJS documentation:

The $http service is a fundamental component of Angular that aids in communication with remote HTTP servers.

When making an $http call, the response object contains various properties, including:

data – {string|Object} – The response body transformed using transform functions.

status – {number} – HTTP status code of the response, useful for conditional logic.

statusText – {string} – HTTP status text of the response.

In your example, Promise.protorype.then() is used to handle success and error scenarios once the promise is fulfilled by the $http.get call.

Here's a modified version based on your example:

function getProducts() {
    // Make the http get request
    return $http.get(url).then(

        //Success - 200 status code
        function(response) {
            products= response.data.result;
                return products;
        },

        //Error handling
        function(response) {

           // Access status property and statusText
           console.log("Http Status: " + response.status + " Description: " +   response.statusText);

           // Return false
           return false;
});

A recommended way is to utilize a library like Angular-UI-Notification for better user experience:

//Success handler function
function handle_response_success(response) {
    // Process response and show success notification
    Notification.success('Success notification');
};

// Error handler function
function handle_response_error(error) {
     Notification.error('Request failed. Details: ' + 'Http Status: ' + error.status + ' Description: ' +   error.statusText);
}

// Bind handlers to getProducts call

function getProducts() {

    // Using a cleaner approach
    return $http({ method: 'GET',
        url: 'http://example.com'
     });
};

// More elegant error handling approach
getProducts.then(handle_response_success.bind(this), handle_response_error.bind(this));

Obtaining status codes from URLs can be achieved by leveraging various methods

Answer №1

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