java - Download file from rest webservices spring -

i'm trying download file calling rest webservices. i'm using spring + jersey web services , angular 2 front. when clink on front, webservices file the window download not shown.

my rest api :

    @post     @path("/download")     @apioperation(value = "download")     @produces(mediatype.application_octet_stream)     public response downloadfile(@apiparam(value = "file", required = true) string filepath) {         file file = new file("/webapps/pdf/upload/msg/1/gest.png");         response.responsebuilder response = response.ok((object) file);         try {             string contenttype = files.probecontenttype(file.topath());             response.header("content-disposition", "attachment; filename="+file.getname());             response.header("content-type", contenttype);             return response.build();         } catch (ioexception e) {             e.printstacktrace();         }         return null;     } 

my angular service :

    downloadfile(path) {       const headers = new headers({'content-type': 'application/x-www-form-urlencoded', 'accept': '*'});       const options = new requestoptions({headers: headers});        options.responsetype = responsecontenttype.blob;       return this.http.post(apiurl + "msg/download", path, options)       .catch(this.handleerror);   } 

my angular component :

  downloadfile(documentpath) {     this.msgservice.downloadfile(documentpath).subscribe(response => {       var contenttype = response.headers('content-type');       let url = window.url.createobjecturl(new blob([response._body], {type: contenttype}));       window.open(url);           });   } 

html :

<figure class="ui-g-12 " *ngfor="let document of msg.documents_path" (click)="downloadfile(document)">       <img  [src]="selectimagebyextension(document.split('.').pop().tolowercase())"  />       <figcaption>{{document.split('/').pop().tolowercase()}}</figcaption> </figure> 

when click on figure can see file gotten:

but nothing pops up. did miss ?

so solution working me use request instead of post passing filepath pathparam.

rest api :

    @get     @path("/download/{filepath}")      @produces(mediatype.application_octet_stream)     public response getdownloadfile(@pathparam("filepath") string filepath) {         string path = null;              byte [] barr = base64.getdecoder().decode(filepath);             path = new string(barr);         file file = new file(path);         try {             string contenttype = files.probecontenttype(file.topath());              response.responsebuilder response = response.ok((object) file);             response.header("content-disposition", "attachment; filename="+file.getname());             response.header("content-type", contenttype);             response.header("content-length", file.length());             return response.build();         } catch (ioexception e) {             e.printstacktrace();             return response.status(status.internal_server_error).entity(e.getmessage()).build();         }     } 

angular service :

    downloadfile(path) {     const headers = new headers({'content-type': 'text/plain', 'accept': '*'});     const options = new requestoptions({headers: headers});     options.responsetype = responsecontenttype.blob;     return this.http.get(apiurl + "msg/download/"+btoa(path), options)       .map(res => res)       .catch(this.handleerror);   } 

angular component :

  downloadfile(documentpath) {     this.msgservice.downloadfile(documentpath).subscribe(response => {         let params = documentpath.split('/' );         var blob = new blob([response._body]);         filesaver.saveas(blob, params[params.length-1]);       });   }