Angular HttpClient Get method with body

Question

I\'m improving an existing API, and the requirement is to provide a single get method which can accept multiple search criteria and based on those criteria perform the query

Answer 1

To make Amir's answer some more generic I have done the following to build params for the passed item.

To my generic data service I have added this variant:

// Get data for passed parameters or item containing filters
public getByItem(apiMethod: string, item?: T, apiParms?: HttpParams): Observable {
    if (!apiParms) apiParms = new HttpParams();
    if (item) {
        const keys = Object.keys(item) as Array;
        for (let key of keys) {
            apiParms = apiParms.append(key.toString(), item[key].toString());
        }
    }
    // Call generic method of data service
    return this.get(apiMethod, apiParms); // => return this.http.get(environment.apiUrl + apiMethod, { headers: this.defaultHeaders