问题描述
我尝试在我的应用程序中使用 Appengine Blobstore 发送大文件,所以在我的控制器中我这样做是为了在我的页面 html 中使用 thymeleaf 发送 blobstoreService
private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
model.addAttribute("blobstoreService",blobstoreService);
这是我表单中发送请求的操作;
th:action="${blobstoreService.createUploadUrl(/upload)}"
这是我的控制器来处理呼叫
@PostMapping("/upload")
public ResponseEntity<String> uploadVideo(HttpServletRequest req,HttpServletResponse res){
Map<String,List<BlobKey>> blobs = blobstoreService.getUploads(req);
List<BlobKey> blobKeys = blobs.get("videoFile");
if (blobKeys == null || blobKeys.isEmpty()) {
res.sendRedirect("/");
} else {
BlobKey blobKey = new BlobKey(blobKeys.get(0).getKeyString());
blobstoreService.serve(blobKey,res);
}
}
我收到此错误
ERROR 9044 --- [qtp204715855-22] o.s.b.w.servlet.support.ErrorPageFilter : Forwarding to error page from request [/_ah/upload/aglub19hcHBfaWRyIgsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxiAgICAgIDACQw] due to exception [null]
java.lang.NullPointerException: null
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:432) ~[appengine-api-stubs.jar:na]
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:70) ~[appengine-api-stubs.jar:na]
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:116) ~[na:na]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_201]
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:113) ~[appengine-api-stubs.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) ~[servlet-api-3.1.jar:3.1.0]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[servlet-api-3.1.jar:3.1.0]
at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1452) ~[na:na]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:791) ~[na:na]
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626) ~[na:na]
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134) ~[na:na]
对此有任何想法!提前谢谢你
解决方法
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