我尝试将图像从Android客户端发布到本地开发服务器（Android Studio 1.0.2）上的blobstore，但在本地服务器上出现以下错误：
req == null? : false
req size : 7680130
ihimage
blobs is null? : false
blobs empty: true
blobs size: 0
blobKeys is null? : true
ก.พ. 02, 2558 10:37:57 ก่อนเที่ยง com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: /_ah/upload/ag9teUFwcGxpY2F0aW9uSWRyIgsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxiAgICAgICACgw
java.lang.NullPointerException
at net.xxx.UloadServlet.doPost(UloadServlet.java:53)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:432)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:71)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:117)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:114)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
ก.พ. 02, 2558 10:37:57 ก่อนเที่ยง com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: Error for /_ah/api/postApi/v1/post
java.lang.NoClassDefFoundError: com/google/appengine/repackaged/org/codehaus/jackson/node/ObjectNode
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2532)
at java.lang.Class.getConstructor0(Class.java:2842)
at java.lang.Class.newInstance(Class.java:345)
at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.lang.ClassNotFoundException: com.google.appengine.repackaged.org.codehaus.jackson.node.ObjectNode
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:216)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 42 more
ก.พ. 02, 2558 10:38:03 ก่อนเที่ยง com.google.appengine.api.datastore.dev.LocalDatastoreService$PersistDatastore persist
INFO: Time to persist datastore: 58 ms
ก.พ. 02, 2558 10:38:42 ก่อนเที่ยง com.google.apphosting.utils.jetty.JettyLogger info
INFO: org.mortbay.io.nio.SelectorManager$SelectSet@599cf3f6 JVM BUG(s) - injecting delay3 times
ก.พ. 02, 2558 10:38:42 ก่อนเที่ยง com.google.apphosting.utils.jetty.JettyLogger info
INFO: org.mortbay.io.nio.SelectorManager$SelectSet@599cf3f6 JVM BUG(s) - recreating selector 3 times, canceled keys 122 times
这是服务器上的servlet代码
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
System.out.println("req == null? : "+(req==null));
System.out.println("req size : "+req.getContentLength());
for (Enumeration<String> e = req.getParameterNames(); e.hasMoreElements();)
System.out.println(e.nextElement());
Map<String, List<BlobKey>> blobs = bstoreservice.getUploads(req);
System.out.println("blobs is null? : " + (blobs == null));
if (blobs!= null){
System.out.println("blobs empty: "+blobs.isEmpty());
System.out.println("blobs size: " + blobs.size());
}
List<BlobKey> blobKeys = blobs.get("ihimage");
System.out.println("blobKeys is null? : " + (blobKeys == null));
if (blobKeys!=null)
System.out.println("blobKeys size : "+blobKeys.size());
BlobKey blobKey = blobKeys.get(0);
ImagesService imagesService = ImagesServiceFactory.getImagesService();
ServingUrlOptions servingOptions = ServingUrlOptions.Builder.withBlobKey(blobKey);
String servingUrl = imagesService.getServingUrl(servingOptions);
resp.setStatus(HttpServletResponse.SC_OK);
resp.setContentType("application/json");
JSONObject json = new JSONObject();
json.put("servingUrl", servingUrl);
json.put("blobKey", blobKey.getKeyString());
PrintWriter out = resp.getWriter();
out.print(json.toString());
out.flush();
out.close();
}
这是客户端代码
private void doNewPost() {
getUrlTask gurlTask = new getUrlTask();
String[] tmp = new String[1];
tmp[0] = "http://"+SERV_ADDR+":8080/blob/getuplurl";
gurlTask.execute(tmp);
}
class getUrlTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String url = params[0];
HttpClient hclient = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(hclient.getParams(), 10000);
HttpGet hget = new HttpGet(url);
String respStr = null;
try {
HttpResponse resp = hclient.execute(hget);
respStr = new BasicResponseHandler().handleResponse(resp);
} catch (IOException e) {
e.printStackTrace();
}
//return null;
return respStr;
}
@Override
protected void onPostExecute(String s) {
doUpload(s);
}
}
private void doUpload(String uloadurl) {
UploadTask uploadTask = new UploadTask();
//bitmap to byte array conversion
int bytes = bitmap.getRowBytes()*bitmap.getHeight();
ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
bitmap.copyPixelsToBuffer(buffer); //Move the byte data to the buffer
byte[] array = buffer.array();
Object[] tmp = new Object[2];
tmp[0] = uloadurl;
tmp[1] = array;
uploadTask.execute(tmp);
}
class UploadTask extends AsyncTask<Object, Void, String>{
@Override
protected String doInBackground(Object[] objects) {
String ulurl = (String) objects[0];
byte[] bytimg = (byte[]) objects[1];
if (ulurl == null) return null;
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(ulurl);
MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
entityBuilder.addBinaryBody("ihimage", bytimg);
HttpEntity entity = entityBuilder.build();
httppost.setEntity(entity);
HttpResponse response = null;
try {
response = httpclient.execute(httppost);
} catch (IOException e) {
e.printStackTrace();
}
//storeData(p);
return response.toString();
}
在服务器端，当我尝试从空列表中获取blobkey时，我得到了NullPointerException。
我的问题是： 当HttpServletReqest（req）大小不为null或为零时？
为什么“bstoreservice.getUploads（req）”返回空列表？有什么想法吗？
答案 0 :(得分：0)
我自己想出来，'getUpload'返回空列表，因为在更改为使用FileBody后无法上传字节数组，一切正常。