使用Angular 6和Spring Rest API下载文件 [英] Download a file using Angular 6 and Spring Rest API
本文介绍了使用Angular 6和Spring Rest API下载文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在使用angular 6从rest api下载文件时遇到问题
I have a problem downloading a file from a rest api using angular 6
后端方法
@RequestMapping(value = "/print/{id}")
public ResponseEntity<byte[]> generateReport(@PathVariable("id") long id_project){
Map<String, Object> mapper = new HashMap<String, Object>();
byte[] content = exportService.export(mapper, ReportUtils.testReport, ReportUtils.FileFormat.PDF.toString());
return new ResponseEntity<>(content, Utils.getPDFHeaders("Situation_test.pdf"), HttpStatus.OK);
}
Mathod getHeader
Mathod getHeader
public static HttpHeaders getPDFHeaders(String fileName) {
HttpHeaders head = new HttpHeaders();
head.setContentType(MediaType.parseMediaType("application/pdf"));
head.add("content-disposition", "attachment; filename=" + fileName);
head.setContentDispositionFormData(fileName, fileName);
head.setCacheControl("must-revalidate, post-check=0, pre-check=0");
return head;
}
我的Angular服务
My Angular Service
download(url: string): any {
let headers = new HttpHeaders();
headers = headers.append('Authorization', 'Bearer ' + this.getToken());
this.http.get(this.API_URL + url, {headers: headers}).subscribe((res) => {
const file = new Blob([res], {
type: 'application/pdf',
});
const a = document.createElement('a');
a.href = this.API_URL + (<any>res)._body;
a.target = '_blank';
document.body.appendChild(a);
a.click();
return res;
}, error => {
let alert: any = {
title: 'Notify Title',
body: 'Notify Body',
};
alert.body = error.error.message || JSON.stringify(error.error);
alert.title = error.error.error;
alert = this.alertService.handleError(error);
alert.position = 'rightTop';
console.log(error);
this.alertService.notifyError(alert);
return error;
});
}
我已经使用PostMan尝试了我的API,它的单词完美,但是在Angular中,它给了我这个错误
I have already tried my API using PostMan and it word perfectly but in Angular it give me this error
HttpErrorResponse {headers: HttpHeaders, status: 200, statusText: "OK", url: "http://localhost:8080/api/projects/print/1", ok: false, …}
error: {error: SyntaxError: Unexpected token % in JSON at position 0 at JSON.parse (<anonymous>) at XMLHttp…, text: "%PDF-1.4↵%����↵3 0 obj↵<</Filter/FlateDecode/Lengt…25f1>]/Root 8 0 R/Size 10>>↵startxref↵1049↵%%EOF↵"}
headers: HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message: "Http failure during parsing for http://localhost:8080/api/projects/print/1"
name: "HttpErrorResponse"
ok: false
status: 200
statusText: "OK"
url: "http://localhost:8080/api/projects/print/1"
推荐答案
尝试将内容类型添加到请求标头中. 您可以试试看这个例子:
Try adding content-type to your request headers. You can try this as an exemple:
let headers = new Headers({'Content-Type': 'application/pdf', 'Accept': 'application/pdf'});
这篇关于使用Angular 6和Spring Rest API下载文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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