when i use retrofit .I got the exception java.lang.NoClassDefFoundError: Failed resolution of: Lokio/Buffer;i use okhttpclient in order to set header for retrofit.get userList is a post method,and i need to send body in request.
private void getUserList(int startIndex){
final JSONObject audienceObj = ProtocolHelper.getProtocolUtils(mContext).getUserlistJsonObj(mRoomData.mUid, mRoomData.mRoomId, startIndex);
OkHttpClient okClient = new OkHttpClient.Builder()
.addInterceptor(
new Interceptor() {
#Override
public okhttp3.Response intercept(Interceptor.Chain chain) throws IOException {
Request original = chain.request();
// Request customization: add request headers
Request.Builder requestBuilder = original.newBuilder()
.header("sessionId", CommonData.getUserInfo(mContext).sessionId);
Request request = requestBuilder.build();
return chain.proceed(request);
}
})
.build();
String baseUrl = ProtocolUtils.BASE_URL+"/";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.client(okClient)
.build();
String audienceUrl = ProtocolHelper.getProtocolUtils(mContext).getProtocolUrl(ProtocolUtils.PROTOCOL_MSG_ID_MEMBER_LIST);
AudienceInterface audienceInterface = retrofit.create(AudienceInterface.class);
Call<String> call = audienceInterface.getAudienceList(audienceUrl,audienceObj);
call.enqueue(new Callback<String>() {
#Override
public void onResponse(Call<String> call, Response<String> response) {
Log.d(TAG, "onResponse");
}
#Override
public void onFailure(Call<String> call, Throwable t) {
Log.d(TAG, "onFailure"+t.getMessage());
}
});
}
public interface AudienceInterface {
#POST("{url}")
Call<String>getAudienceList(#Path("url") String url,#Body JSONObject boder);
}
the log t.getMessage is :java.lang.NoClassDefFoundError: Failed resolution of: Lokio/Buffer;
I solved it by adding:
implementation 'com.squareup.okio:okio:2.1.0'
in dependencies under build.gradle(Module: app).
Alright.~I found this error last time too.
By this:
NoClassDefFoundError: Failed resolution of: Lokio/Buffer
You might lost another jar lib--Okio.
You can download the jar file from github:
https://github.com/square/okio
And add this lib to your project.
Related
#Slf4j
public class DownloadImg {
private final WebClient webClient;
private final Vertx vertx;
public DownloadImg(Vertx vertx) {
WebClientOptions newOptions = new WebClientOptions();
newOptions.setDefaultPort(12345);
newOptions.setDefaultHost("localhost");
webClient = WebClient.create(vertx,newOptions);
this.vertx = vertx;
}
public void download(String scm, String version) {
String file = String.format("/%s_%s.tar.gz", scm.replace("/", "."), version);
webClient.get("url_for_file")
.send(it -> {
it.result();// i acully
});
}
}
I do get all the file data, but I want to handle those data by stream API in case the file is too large or OOM exception.
any idea?
I use HttpClient object for PostAsync. I need to add BackgroundSessionConfiguration for iOS while I am creating HttpClient object. So I changed my code like this:
var configuration = NSUrlSessionConfiguration.CreateBackgroundSessionConfiguration ("my.app.identifier");
_client = new HttpClient (new NSUrlSessionHandler (configuration));
This works when I send first request with PostAsync. But when I send request second time, it doesn't work.
I did it for Login Operation like this: (It works first time but if I logout and login again, it doesn't work.)
public class LoginService
{
private HttpClient _client;
public LoginService()
{
if (_client == null)
{
_client = Helper.CreateHttpClientLogin(_client);
}
}
public async Task<LoginResponse<LoginDataResponse>> Login(LoginRequest request)
{
LoginResponse<LoginDataResponse> responseModel = new LoginResponse<LoginDataResponse>();
try
{
string json = JsonConvert.SerializeObject(request);
var content = new StringContent(json, Encoding.UTF8, "application/json");
var jsonBody = await _client.PostAsync(App.ServiceURL.Login_Url, content);
string jsonstr = await jsonBody.Content.ReadAsStringAsync();
if (jsonstr == null || jsonstr == "")
{
responseModel.Success = false;
responseModel.Status = 0;
responseModel.Message = AppResources.UnknownHostException;
}
else
responseModel = (LoginResponse<LoginDataResponse>)JsonConvert.DeserializeObject(jsonstr, typeof(LoginResponse<LoginDataResponse>));
}
catch (Exception ex)
{
string text = ex.ToString();
responseModel.Status = 0;
AppResources.Culture = CrossMultilingual.Current.CurrentCultureInfo;
responseModel.Message = AppResources.UnknownHostException;
}
return responseModel;
}
}
public class Helper
{
public static HttpClient CreateHttpClientLogin(HttpClient _client)
{
if (Device.RuntimePlatform == Device.iOS)
{
var configuration = NSUrlSessionConfiguration.CreateBackgroundSessionConfiguration("my.app.identifier");
_client = new HttpClient(new NSUrlSessionHandler(configuration));
}
else
{
//_client = new HttpClient(new System.Net.Http.HttpClientHandler());
HttpClientHandler handler = new HttpClientHandler();
handler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true;
_client = new HttpClient(handler);
}
return _client;
}
}
And I have this code on AppDelegate: (I don't know but maybe it causes the bug)
public static Action BackgroundSessionCompletionHandler;
public override void HandleEventsForBackgroundUrl(UIApplication application, string sessionIdentifier, Action completionHandler)
{
// We get a completion handler which we are supposed to call if our transfer is done.
BackgroundSessionCompletionHandler = completionHandler;
}
What must I do for this?
Edit:
I solved the problem I mentioned above by creating the Login Service object once the application was first opened. (After logout previously, I was rebuilding every time I login)
But now I have other error. When I run my app on "iPhone 7 plus - iOS 13.6" device I got this error:
System.Net.Http.HttpRequestException: unknown error ---> Foundation.NSErrorException: Error Domain=NSURLErrorDomain Code=-1 "unknown error" UserInfo={NSErrorFailingURLStringKey=https://mydomain/Api/Login, NSErrorFailingURLKey=https://mydomain/Api/Login, _NSURLErrorRelatedURLSessionTaskErrorKey=(
"BackgroundDataTask <E69F3EAF-0AE9-4FAE-A01B-988167B7F6BC>.<3>"
), _NSURLErrorFailingURLSessionTaskErrorKey=BackgroundDataTask <E69F3EAF-0AE9-4FAE-A01B-988167B7F6BC>.<3>, NSLocalizedDescription=unknown error}
--- End of inner exception stack trace ---
at System.Net.Http.NSUrlSessionHandler.SendAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) [0x001d4] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.20.2.2/src/Xamarin.iOS/Foundation/NSUrlSessionHandler.cs:527
at System.Net.Http.HttpClient.FinishSendAsyncBuffered (System.Threading.Tasks.Task`1[TResult] sendTask, System.Net.Http.HttpRequestMessage request, System.Threading.CancellationTokenSource cts, System.Boolean disposeCts) [0x0017e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corefx/src/System.Net.Http/src/System/Net/Http/HttpClient.cs:506
at App.Services.LoginService.Login (FileOrbis.Models.RequestModels.LoginRequest request) [0x00084] in C:\Users\PcName\Desktop\App\App\Services\LoginService.cs:40
And simulator log file is:
Startup:
arguments: --device=06098E5B-1853-4A83-8434-8071D8973A14 --launchsim=//Users/deytek/Library/Caches/Xamarin/mtbs/builds/App.iOS/b2c75f2acbd4ff91c305dba10ca791b7/bin/iPhoneSimulator/Debug/App.iOS.app -argument=-monodevelop-port -argument=51890 -setenv=__XAMARIN_DEBUG_PORT__=51890 --sdkroot=/Applications/Xcode.app -h=192.168.1.7 -ssh=deytek --launched-by=devenv-16.0
version: 16.7.0.0 (54a29526ef6f853bdd37adbcc3791ce90ca82735)
Connecting to existing client
Exit:
Exit Code: 0
I encounter with this error when I use Background Session Configuration. If I use normal HttpClient object (without Background Session Configuration), it works
NOTE: I also tried iPhone 5s iOS 12.4.8 and iPad Pro (3rd Generation) iOS 13.6.1 It works these devices. But it doesn't work on iPhone 7 Plus 13.6
A simple Spring Boot REST Controller
#PostMapping(path = "check-and-submit", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<MyOutput> checkAndSave(#RequestBody #Valid MyInput input, Errors errors){
ResponseEntity<MyOutput> result = null;
if (errors.hasErrors()) {
result = new ResponseEntity<>(MyOutput.buildErrorResponse(errors), HttpStatus.INTERNAL_SERVER_ERROR);
} else {
myDao.save(input.buildEntity());
result = new ResponseEntity<>(MyOutput.buildSuccessResponse(), HttpStatus.OK);
}
return result;
}
And the test class for it
public static void main(String[] args) {
MyInput dto = new MyInput();
// set properties
RestTemplate restTemplate = new RestTemplate();
MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();
headers.add("Content-Type", "application/json");
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
HttpEntity<MyInput> request = new HttpEntity<MyInput>(dto, headers);
try {
ResponseEntity<MyOutput> result = restTemplate.postForEntity(URL, request, MyOutput.class);
System.out.println(result);
} catch(Exception e) {
e.printStackTrace();
}
}
For success scenario this works fine. But, for exception scenrio, i.e. HTTP 500 this fails
org.springframework.web.client.HttpServerErrorException: 500 null
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:97)
As suggested in one of the posts, I created a error-handler that can successfully read the response
public class TestHandler extends DefaultResponseErrorHandler {
#Override
public void handleError(ClientHttpResponse response) throws IOException {
Scanner scanner = new Scanner(response.getBody());
String data = "";
while (scanner.hasNext())
data += scanner.next();
System.out.println(data);
scanner.close();
}
}
But how can I let RestTemplate read and deserialize the response JSON even in case of HTTP 500.
Before any other human-question-flagging-bot marks this as duplicate, here's a humble explanation on how this is different from the others.
All other questions address how to handle HTTP 500, at max read the response-body. This questions is directed at if it is possible to deserialize the response as JSON as well. Such functionality is well established in frameworks such as JBoss RESTEasy. Checking how same can be achieved in Spring.
This should work.
try {
ResponseEntity<MyOutput> result = restTemplate.postForEntity(URL, request, MyOutput.class);
} catch(HttpServerErrorException errorException) {
String responseBody = errorException.getResponseBodyAsString();
// You can use this string to create MyOutput pojo using ObjectMapper.
}
I have a singleton class for network connections. I want the timeout increased and have written the following code.
BizAnalystApiv2 provideBizAnalystApiV2(final ObjectMapper mapper) {
final HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
if (BuildConfig.DEBUG) {
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
} else {
logging.setLevel(HttpLoggingInterceptor.Level.NONE);
}
final OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(logging)
.addInterceptor(new Interceptor() {
#Override
public Response intercept(Chain chain) throws IOException {
Request original = chain.request();
Request request = original.newBuilder()
.header("instanceId", FirebaseInstanceId.getInstance().getId())
.build();
return chain.proceed(request);
}
})
.readTimeout(70, TimeUnit.SECONDS)
.build();
return new Retrofit.Builder()
.addConverterFactory(JacksonConverterFactory.create(mapper))
.client(client)
.baseUrl(BizAnalystServicev2.getServerUrl())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build()
.create(BizAnalystApiv2.class);
}
The timeout remains at 15 seconds which is the default timeout. Can you suggest what is the issue.
I am using okhttp(v 3.4.1) and retrofit (v 2.1.0)
How can I intercept and send custom error messages with file upload when file size is exceeded. I have an annotated exception handler in the controller class, but the request does not come to the controller. The answer I came across on this link How to handle MaxUploadSizeExceededException suggests implementing HandlerExceptionResolver.
Have things changed in Spring 3.5 or is that still the only solution?
I ended up implementing HandlerExceptionResolver:
#Component public class ExceptionResolverImpl implements HandlerExceptionResolver {
private static final Logger LOG = LoggerFactory.getLogger(ExceptionResolverImpl.class);
#Override
public ModelAndView resolveException(HttpServletRequest request,
HttpServletResponse response, Object obj, Exception exc) {
if(exc instanceof MaxUploadSizeExceededException) {
response.setContentType("text/html");
response.setStatus(HttpStatus.REQUEST_ENTITY_TOO_LARGE.value());
try {
PrintWriter out = response.getWriter();
Long maxSizeInBytes = ((MaxUploadSizeExceededException) exc).getMaxUploadSize();
String message = "Maximum upload size of " + maxSizeInBytes + " Bytes per attachment exceeded";
//send json response
JSONObject json = new JSONObject();
json.put(REConstants.JSON_KEY_MESSAGE, message);
json.put(REConstants.JSON_KEY_SUCCESS, false);
String body = json.toString();
out.println("<html><body><textarea>" + body + "</textarea></body></html>");
return new ModelAndView();
}
catch (IOException e) {
LOG.error("Error writing to output stream", e);
}
}
//for default behaviour
return null;
}
}