java.net.ProtocolException: Expected ':status' header not present - android-asynctask

Question

I just saw a Protocol Exception suddenly in a working app. Starting today all the network calls are failing and getting empty in our application, but the API is working with web browsers.
I updated okHttp & Gson dependencies in my application Gradle but still get the same error. My Server name is nginx .
I also checked same URL in volley and successfully got a response from the server, but I used the same URL and wrote code in Retrofit and it is not working there (no response from server)
Is this related to an android okHttp problem or is it a server-related problem?
MainActivity.java:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerview = (RecyclerView) findViewById(R.id.recyclerview);
recyclerview.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerview.setLayoutManager(layoutManager);
tabs_adapter = new Tabs_Adapter(MainActivity.this, topTabList);
recyclerview.setAdapter(tabs_adapter);
new AsyncTask<JSONObject, Object, Tabs_Response>() {
#Override
protected Tabs_Response doInBackground(JSONObject... jsonObjects) {
try {
String url = "https://api.bargaincry.com/apurl/deal/get_ApiCategory/41187";
Request request = new Request.Builder().url(url).build();
Response response = new OkHttpClient().newCall(request).execute();
strResponse = response.body().string();
} catch (IOException e) {
e.printStackTrace();
}
Tabs_Response tabs_response = new Gson().fromJson(strResponse,Tabs_Response.class);
return tabs_response;
}
#Override
protected void onPostExecute(Tabs_Response tabs_response) {
if (tabs_response != null && tabs_response.getTopTabs() != null && tabs_response.getTopTabs().size() > 0) {
topTabList = tabs_response.getTopTabs();
tabs_adapter = new Tabs_Adapter(MainActivity.this, topTabList);
recyclerview.setAdapter(tabs_adapter);
}
}
}.execute();
}
Tap_Response.java:
public class Tabs_Response {
#SerializedName("status")
#Expose
private String status;
#SerializedName("top_tabs")
#Expose
private List<TopTab> topTabs = null;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public List<TopTab> getTopTabs() {
return topTabs;
}
public void setTopTabs(List<TopTab> topTabs) {
this.topTabs = topTabs;
}
}
TopTab.java:
public class TopTab {
#SerializedName("category_id")
#Expose
private String categoryId;
#SerializedName("category_name")
#Expose
private String categoryName;
public String getCategoryId() {
return categoryId;
}
public void setCategoryId(String categoryId) {
this.categoryId = categoryId;
}
public String getCategoryName() {
return categoryName;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
Tabs_Adapter.java:
public class Tabs_Adapter extends RecyclerView.Adapter {
private Context context;
private List<TopTab> tabList;
private TopTab topTab;
public Tabs_Adapter(Context context, List<TopTab> tabList){
this.context = context;
this.tabList = tabList;
}
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public TopTab topTab;
public MyViewHolder(View itemView) {
super(itemView);
textView = (TextView)itemView.findViewById(R.id.tabtext_data);
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.list_items,parent,false);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
topTab = tabList.get(position);
((MyViewHolder)holder).textView.setText(topTab.getCategoryName());
((MyViewHolder)holder).topTab =topTab;
}
#Override
public int getItemCount() {
if (tabList != null){
return tabList.size();
}else {
return 0;
}
}
LogCat:
java.net.ProtocolException: Expected ':status' header not present
02-14 11:38:52.468 12631-19978/com.example.srikanth.toptabs_activity
W/System.err: at
com.squareup.okhttp.internal.http.FramedTransport.readNameValueBlock(FramedTransport.java:197)
02-14 11:38:52.468 12631-19978/com.example.srikanth.toptabs_activity
W/System.err: at
com.squareup.okhttp.internal.http.FramedTransport.readResponseHeaders(FramedTransport.java:104)
02-14 11:38:52.468 12631-19978/com.example.srikanth.toptabs_activity
W/System.err: at
com.squareup.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:906)
02-14 11:38:52.468 12631-19978/com.example.srikanth.toptabs_activity
W/System.err: at
com.squareup.okhttp.internal.http.HttpEngine.access$300(HttpEngine.java:92)
02-14 11:38:52.468 12631-19978/com.example.srikanth.toptabs_activity
W/System.err: at
com.squareup.okhttp.internal.http.HttpEngine$NetworkInterceptorChain.proceed(HttpEngine.java:891)

Answer 1

Update Retrofit and Okhttp3 libraries to this version.
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.squareup.retrofit2:retrofit:2.3.0'

Answer 2

Fixed in current versions of OkHttp. Please upgrade.