Perform an Angular HTTP request and await responses from multiple sources

Question

Perform an Angular HTTP request and await responses from multiple sources

I'm currently working with Angular 11 and looking to make an HTTP call to an API that will trigger a server-side process.

Here's the code for the HTTP call:

processData(data) {
    return this.httpClient.post('https://myurl/api/process', {
      data: data
    }, 
    { 
      headers: this.headers() 
    });
}

Once this call is made, the API will initiate a process on the server and handle its operations.

Since this process might take some time to complete, I want Angular to actively listen for various responses, such as progress updates sent by the server.

This way, Angular can provide real-time feedback to the user regarding the progress of the operation and prevent timeouts while waiting for the final result.

Is it possible to achieve this functionality in Angular? If so, how can it be implemented?

angular typescript rxjs angular11

Answer 1

Answer №1

To display progress for any HTTP request, make sure to include reportProgress: true. If you wish to monitor all events, including transfer progress, also add observe: 'events' and return an Observable of type HttpEvent. This way, you can capture various events like DownloadProgress and Response in the component method. For more information, refer to https://angular.io/guide/http#listening-to-progress-events

Answer 2

To display progress for any HTTP request, make sure to include reportProgress: true. If you wish to monitor all events, including transfer progress, also add observe: 'events' and return an Observable of type HttpEvent. This way, you can capture various events like DownloadProgress and Response in the component method. For more information, refer to https://angular.io/guide/http#listening-to-progress-events

Answer 3

Answer №2

When you call the post method, it will give you an observable that can emit values multiple times. To use this method effectively, follow these steps:

handleData(data).subscribe((result) => {
   console.log('Received response from server:', result);
});

console.log('While waiting for the server to respond, I will continue doing other tasks');
doOtherTasks();

Answer 4

When you call the post method, it will give you an observable that can emit values multiple times. To use this method effectively, follow these steps:

handleData(data).subscribe((result) => {
   console.log('Received response from server:', result);
});

console.log('While waiting for the server to respond, I will continue doing other tasks');
doOtherTasks();

Perform an Angular HTTP request and await responses from multiple sources

Answer №1

Answer №2

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