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私はPDFを返さなければならないSpringブートREST APIを持っています。 PDFをバイト配列に変換してから、それをクライアントに返す前にbase64でエンコードしました。ここでSpring起動Angular2、JSONでPDFを返します
は私のインターフェイスです：
@ApiOperation(value = "Update an existing form", notes = "Update an existing form ", response = Void.class, tags={ })
@ApiResponses(value = {
@ApiResponse(code = 200, message = "form response", response = Void.class),
@ApiResponse(code = 200, message = "unexpected error", response = Void.class) })
@RequestMapping(value = "/forms/{formId}/submissions/{submissionId}/pdf",
method = RequestMethod.GET)
ResponseEntity<Resource> pdf(
@ApiParam(value = "Id of the form that needs to be updated", required = true) @PathVariable("formId") Long formId,
@ApiParam(value = "Id of the submission that needs to be updated", required = true) @PathVariable("submissionId") Long submissionId,
@ApiParam(value = "token to be passed as a header", required = true) @RequestHeader(value = "token", required = true) String token
);
し、実施方法：
generatePdf(){
this.submissionService.generatePdf(this.form.id, this.submission.id).then(data => {
console.log(JSON.stringify(data));
let file = new Blob([atob(data._body)]);
FileSaver.saveAs(file, 'helloworld.pdf')
}).catch(error => {
console.log(error);
});
}
私はペイロードに受信PDF：
@Override
public ResponseEntity<Resource> pdf(@ApiParam(value = "Id of the form that needs to be updated", required = true) @PathVariable("formId") Long formId, @ApiParam(value = "Id of the submission that needs to be updated", required = true) @PathVariable("submissionId") Long submissionId, @ApiParam(value = "token to be passed as a header", required = true) @RequestHeader(value = "token", required = true) String token) {
String name = JWTutils.getEmailInToken(token);
if(name == null) {
return new ResponseEntity<>(HttpStatus.FORBIDDEN);
}
User user = userRepository.findByEmail(name);
if(user == null){
return new ResponseEntity<>(HttpStatus.FORBIDDEN);
}
Form form = formRepository.findById(formId);
if(form == null){
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
Submission submission = submissionRepository.findOne(submissionId);
if(submission == null){
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
//Saving the document
final PDPage singlePage = new PDPage();
final PDFont courierBoldFont = PDType1Font.COURIER_BOLD;
final int fontSize = 12;
ByteArrayOutputStream out = new ByteArrayOutputStream();
try (final PDDocument document = new PDDocument())
{
document.addPage(singlePage);
final PDPageContentStream contentStream = new PDPageContentStream(document, singlePage);
contentStream.beginText();
contentStream.setFont(courierBoldFont, fontSize);
contentStream.newLineAtOffset(150, 750);
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.showText("Hello PDFBox");
contentStream.endText();
contentStream.close(); // Stream must be closed before saving document.
//document.save("pdfs/" + UUID.randomUUID().toString() + ".pdf");
document.save(out);
}
catch (IOException ioEx)
{
ioEx.printStackTrace();
}
byte[] b64 = Base64.getEncoder().encode(out.toByteArray());
ByteArrayResource resource = new ByteArrayResource(b64);
return ResponseEntity.ok()
.contentLength(b64.length)
.contentType(MediaType.parseMediaType("application/octet-stream"))
.body(resource);
}
そして、ここではAngular2のコードです次のようになります。PasteBin
ダウンロードしたPDFを開くと、実際のpdfにテキストが含まれている間に空のページが1ページだけ含まれています。何が起きているのか？私はそれがエンコーディングのような感じです。
SOLUTION
私は私のサービスで私のGETリクエストを変更しなければなりませんでした。私は私のサービスで私のGETリクエストを変更しなければならなかった私の要求responseType: ResponseContentType.Blob;
return this.http.get(this.formsUrl + "/" + formId + "/submissions/" + submissionId + "/pdf", {headers: headers, responseType: ResponseContentType.Blob})
.toPromise()
.then(res => res)
.catch(this.handleError);