Then we can start using it. We use the then method to get the result when the promise is resolved and get the response object as a res variable. In the then method, we log the status code and date from the response header. We get the JSON data as an array easily with res. Consequently, we loop through the users, logging the ID and the name. In case of any error, we log the error message on the console. The code example is accessible as a pull request , too.
Other things remained basically the same as the previous request with Axios. The example can be seen in this pull request too. SuperAgent by VisionMedia is one of the oldest Node. We started the IIFE with async because we want to use await, as mentioned in the next point.
Next, in the try block, we called superagent. Then, from the res variable, we picked out the date from res. Consequently, there is a catch block; if any error occurs anywhere in the try block, it will be caught, and the error message will be logged to the console. SuperAgent is mature and battle-tested, which makes it pretty reliable. We can also test SuperAgent calls with SuperTest , which is a very handy library in its own right.
Like the examples above, the SuperAgent code is available as a pull request. Note that superagent considers 4xx and 5xx responses as well as unhandled 3xx responses errors by default. For example, if you get a Not modified , Forbidden or Internal server error response, this status information will be available via err. Errors from such responses also contain an err.
The library behaves in this way to handle the common case of wanting success responses and treating HTTP error status codes as errors while still allowing for custom logic around specific error conditions. Network failures, timeouts, and other errors that produce no response will contain no err.
If you wish to handle or other HTTP error responses, you can query the err. When an HTTP error occurs 4xx or 5xx response the res. Alternatively, you can use the. The callback to the ok function gets a response and returns true if the response should be interpreted as success. In Node. For example, this request will go to localhost instead of example. The requests will keep their Host header with the original value. Together with.
It's generally safe to ignore broken HTTPS on localhost , because the loopback interface is not exposed to untrusted networks. Trusting localhost may become the default in the future. If you're using promises, do not call. Any use of. Libraries like co or a web framework like koa can yield on any SuperAgent method:.
Note that SuperAgent expects the global Promise object to be present. You'll need a polyfill to use promises in Internet Explorer or Node. JS using core http module. By default Browserify and WebPack will pick the browser version. If want to use WebPack to compile code for Node. JS, you must specify node target in its configuration. Your requests will now show up in the Chrome developer tools Network tab. Note this environment is not covered by automated test suite and not officially supported.
SuperAgent SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. Request basics A request can be initiated by invoking the appropriate method on the request object, then calling. For example a simple GET request: request. You can setup automatic serialization for other types as well: request. Query strings req. Be warned, this method allows MITM attacks.
Binary In browsers, you may use. Response properties Many helpful flags and properties are set on the Response object, ranging from the response text, parsed response body, header fields, status flags and more. Response text The res. Karthikeyan Karthikeyan 1, 2 2 gold badges 30 30 silver badges 73 73 bronze badges. Is there any callback for download fails?
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