Hi This question is not new but I could not find any proper way of doing this.Please help me.
Requirement
Sending a uploaded File inside the json object and handle at rest service.
Example of Sample json:
{
id:"123",
name:"XYZ",
nonProfit:[{
name:"profile1",
attachedFile: object of file
}, {
name:"profile2",
attachedFile: object of file2
}]
}
Problem:
I am able to get the file object inside json but I am not able to send to the service as I guess payload is not going right to the web service.
Is there any way that I can send the json like below and handle in the backend service.
first you have to get base64 of your file
public readFile(fileToRead: File): Observable<MSBaseReader>{
let base64Observable = new ReplaySubject<MSBaseReader>(1);
let fileReader = new FileReader();
fileReader.onload = event => {
base64Observable.next(fileReader.result);
};
fileReader.readAsDataURL(fileToRead);
return base64Observable;
}
after read base64 you should pass it to json file
let params = {
id:"123",
name:"XYZ",
nonProfit:[{
name:"profile1",
attachedFile: this.fileBase64
}
after that you can create a service to send data to backend.first of this create a server.service.ts file for call api
import {Injectable} from '@angular/core';
import {Headers, Http, RequestOptions} from '@angular/http';
import 'rxjs/add/operator/map';
import 'rxjs/add/observable/forkJoin';
import 'rxjs/add/operator/toPromise';
import {AuthenticationService} from "./authentication.service";
import {isUndefined} from "util";
@Injectable()
export class ServerService {
constructor(private http: Http) {
}
servicePost(service: string, parameters: string) {
return this.http.post('/service/' + service, parameters)
}
}
add your service to providers of module
@NgModule({
declarations: [...],
imports: [...],
providers: [AuthGuard,
ServerService],
entryComponents: [...],
bootstrap: [AppComponent]
})
export class AppModule {
}
now add your service to your constructor
constructor(private serverService: ServerService) {
}
and call your service in component.
this.service.servicePost('subDirectoryOfService',params).subscribe(data=>{dosomething after call api})
now in backend you will got in this service with path: /service/subDirectoryOfService
in controller you got in this method
@RequestMapping('/service/subDirectoryOfService')
public String subDirectoyOfService(@FormParam String params){
JSONObject json = new JSONObject(params);
String base64 = json.getString("attachedFile");
System.out.println("base64 of file: "+ base64);
return "{\"res\":\"success\"}"
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.