The use of URL embedded parameters in @angular/http

Currently, I am utilizing a backend system that accepts search query parameters in both the ?-notation and the url-embedded format. I understand that I can use tools like URLSearchParams/RequestOptionsArgs to send requests to .

However, I am curious about how I can achieve a more RESTful approach, such as using , by defining URLs like 'card/:id' similar to setting up application routes.

Below is an example snippet of how I currently construct a GET request:

public getRequest(url: string, params: URLSearchParams): Observable < Response > {
  let options: RequestOptionsArgs = {
    url: url,
    method: RequestMethod.Get,
    headers: RestService.createHeaders(),
    search: params,
    responseType: ResponseContentType.Json
  };

  let request: any = this.http.get(url, options);
  return request.map((res: any) => {
    let response = new ServerResponse(res);
    if (response.status == ServerResponseStatus.OK) return response.data;
    else console.log('ERROR: GET request ' + options + ' resulted in status:' + response.status);
  });
  //.catch(this.handleError);
}

Answer №1

item/:id is a pattern that indicates :id will be substituted with either a number or a string. For example, if you request after replacing this pattern, it would look like . Here, the value "123" represents the dynamic :id part which can vary.

You can easily achieve this by following these steps:

let myId = '123';

 let url = 'http://mywebsite/api/item/' + myId; // here id is a variable passed as an argument

 let request: any = this.http.get(url, options);
      return request.map((res: any) => {
        let response = new ServerResponse(res);
        if (response.status == ServerResponseStatus.OK) return response.data;
        else console.log('ERROR: GET request ' + options + ' resulted in status:' + response.status);
      });
      //.catch(this.handleError);
    }

Answer №2

To enable support for a specific URL format, simply input the desired URL structure into your function. Modify your backend to recognize this new URL pattern. It is important to note that the technology being utilized on the backend was not specified. For NodeJS users, expressJS is highly recommended as it excels in managing URL parameters and routes using the something/:id notation.

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