I implement my http calls via the OkHttp library. Everything works fine, but I noticed that, when I access the body as a string of the response twice an `IllegalStateException` will be thrown. 
That is, I do (for example): `Log.d(&quot;TAG&quot;, response.body().string())` and after that I actually want to use that string like `processResponse(response.body().string())`. But that second call throws the exception with the message `closed`. 

How can it be possible that accessing a string twice results in a failure? I want to process that response without the need to add a wrapper/dummy object just for saving some values (like header, body, statuscode).

Accessing body string of an OkHttp Response twice results in IllegalStateException: closed

I think I need to create a new SSL Socket Factory?
Also, I don&#39;t want to use the global SSL Context (https://github.com/square/okhttp/issues/184) for obvious reasons.

thanks!

**EDIT:**

As of okhttp 2.1.0 you can pin certificates very easily.

See [the source code here][1] to get started


  [1]: https://github.com/square/okhttp/blob/83090befcca69b44c257b96afb519ca66282ca63/okhttp/src/main/java/com/squareup/okhttp/CertificatePinner.java#L43

How can I pin a certificate with Square OKHTTP?

Using OkHttp by Square &lt;https://github.com/square/okhttp&gt;, how can I:

 1. Retrieve a cookie returned from the server
 2. Store the cookie for upcoming requests
 3. Use the stored cookie in subsequent requests
 4. Update the cookie returned by the subsequent request

Ideally the cookie would be stored, resent and updated automatically with every request.

How to implement cookie handling on Android using OkHttp?

I am using Retrofit with the OkHttp Client and Jackson for Json Serialization and want to get the header of the response. 

I know that i can extend the OkClient 
and intercept it. But this comes before the deserialization process starts.

What i basically needs is to get the header alongside with the deserialized Json Object.


Getting Header from Response (Retrofit / OkHttp Client)

I use okhttp to be my httpclient. I think it&#39;s a good api but the doc is not so detailed.

how to use it to make a http post request with file uploading?


    public Multipart createMultiPart(File file){
        Part part = (Part) new Part.Builder().contentType(&quot;&quot;).body(new File(&quot;1.png&quot;)).build();
        //how to  set part name?
        Multipart m = new Multipart.Builder().addPart(part).build();
        return m;
    }
    public String postWithFiles(String url,Multipart m) throws  IOException{
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        m.writeBodyTo(out)
        ;
        Request.Body body =  Request.Body.create(MediaType.parse(&quot;application/x-www-form-urlencoded&quot;),
                out.toByteArray());
    
        Request req = new Request.Builder().url(url).post(body).build();
        return client.newCall(req).execute().body().string();
    
    }

my question is:

1. how to set part name? in the form, the file should be named file1.  
2. how to add other fields in the form?

how to use okhttp to upload a file?

I was wondering how many seconds should I set to my retrofit client. 

1. How many seconds should I use as default timeout?
2. What is the default timeout for OkHttp/Retrofit, should we let default values?

OkHttp/Retrofit default timeout

I am using the latest okhttp version: **okhttp-2.3.0.jar**

How to add query parameters to GET request in okhttp in java ?

I found a [related question][1] about android, but no answer here!


  [1]: https://stackoverflow.com/questions/29875325/add-query-params-to-a-get-request-in-okhttp-in-android

How to add query parameters to a HTTP GET request by OkHttp?

I am currently trying to leverage kotlin coroutines more. But I face a problem: when using moshi or okhttp inside these coroutines I get a warning:

 &quot;inappropriate blocking method call&quot;

What is the best way to fix these? I really do not want to be inappropriate ;-)

How to make &quot;inappropriate blocking method call&quot; appropriate?

I am developing app using OkHttp library and my trouble is I cannot find how to set connection timeout and socket timeout.

    OkHttpClient client = new OkHttpClient();

    Request request = new Request.Builder().url(url).build();

    Response response = client.newCall(request).execute();



How to set connection timeout with OkHttp

I&#39;m trying to use Retrofit &amp; OKHttp to cache HTTP responses. I followed [this gist][1] and, ended up with this code:


&lt;!-- language: lang-java --&gt;

    File httpCacheDirectory = new File(context.getCacheDir(), &quot;responses&quot;);

    HttpResponseCache httpResponseCache = null;
    try {
         httpResponseCache = new HttpResponseCache(httpCacheDirectory, 10 * 1024 * 1024);
    } catch (IOException e) {
         Log.e(&quot;Retrofit&quot;, &quot;Could not create http cache&quot;, e);
    }

    OkHttpClient okHttpClient = new OkHttpClient();
    okHttpClient.setResponseCache(httpResponseCache);

    api = new RestAdapter.Builder()
              .setEndpoint(API_URL)
              .setLogLevel(RestAdapter.LogLevel.FULL)
              .setClient(new OkClient(okHttpClient))
              .build()
              .create(MyApi.class);


And this is MyApi with the Cache-Control headers
&lt;!-- language: lang-java --&gt;

    public interface MyApi {
       @Headers(&quot;Cache-Control: public, max-age=640000, s-maxage=640000 , max-stale=2419200&quot;)
       @GET(&quot;/api/v1/person/1/&quot;)
       void requestPerson(
               Callback&lt;Person&gt; callback
       );

First I request online and check the cache files. The correct JSON response and headers are there. But when I try to request offline, I always get `RetrofitError UnknownHostException`. Is there anything else I should do to make Retrofit read the response from cache?

**EDIT:**
Since OKHttp 2.0.x `HttpResponseCache` is `Cache`, `setResponseCache` is `setCache`

  [1]: https://gist.github.com/swankjesse/5889518 &quot;gist&quot;

Can Retrofit with OKHttp use cache data when offline

For testing purposes, I&#39;m trying to add a socket factory to my okHttp client that trusts everything while a proxy is set. This has been done many times over, but my implementation of a trusting socket factory seems to be missing something:

    class TrustEveryoneManager implements X509TrustManager {
        @Override
        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }

        @Override
        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }

        @Override
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    }
    OkHttpClient client = new OkHttpClient();

    final InetAddress ipAddress = InetAddress.getByName(&quot;XX.XXX.XXX.XXX&quot;); // some IP
    client.setProxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ipAddress, 8888)));

    SSLContext sslContext = SSLContext.getInstance(&quot;TLS&quot;);
    TrustManager[] trustManagers = new TrustManager[]{new TrustEveryoneManager()};
    sslContext.init(null, trustManagers, null);
    client.setSslSocketFactory(sslContext.getSocketFactory);

No requests are being sent out of my app and no exceptions are getting logged so it seems that it&#39;s failing silently within okHttp. Upon further investigation, it seems that there is an Exception being swallowed up in okHttp&#39;s `Connection.upgradeToTls()` when the handshake is being forced. The exception I&#39;m being given is: `javax.net.ssl.SSLException: SSL handshake terminated: ssl=0x74b522b0: SSL_ERROR_ZERO_RETURN occurred. You should never see this.`

The following code produces an `SSLContext` which works like a charm in creating an SSLSocketFactory that doesn&#39;t throw any exceptions:

    protected SSLContext getTrustingSslContext() throws NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
        final SSLContextBuilder trustingSSLContextBuilder = SSLContexts.custom()
                .loadTrustMaterial(null, new TrustStrategy() {
                    @Override
                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return true; // Accepts any ssl cert whether valid or not.
                    }
                });
        return trustingSSLContextBuilder.build();
    }

The issue is that I&#39;m trying to remove all Apache HttpClient dependencies from my app completely. The underlying code with Apache HttpClient to produce the `SSLContext` seems straightforward enough, but I&#39;m obviously missing something as I cannot configure my `SSLContext` to match this.

Would anyone be able to produce an SSLContext implementation which does what I&#39;d like without using Apache HttpClient?

Trusting all certificates with okHttp

with OkHttp we can make HTTP request then get response from server

    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder()
      .url(url)
      .build();
    Response response = client.newCall(request).execute();
then with Gson lib convert response to object we need.

this is from Square/OkHttp doc:
 

&gt; Its request/response API is designed with fluent builders and
&gt; immutability. It supports both synchronous blocking calls and async
&gt; calls with callbacks

I read from [stackOverFlow][1]

&gt; Retrofit uses OkHTTP automatically if available

.
 
So my question is what is exactly Retrofit for?

what Retrofit can do that OkHttp can not?!


I think OkHttp and Gson solve request API problem,
so what problem Retrofit solve for us?

  [1]: https://stackoverflow.com/questions/16902716/comparison-of-android-networking-libraries-okhttp-retrofit-volley &quot;stackOverFlow&quot;

why use Retrofit when we have OkHttp

I have this interceptor that i add to my OkHttp client:

    public class RequestTokenInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
      Request request = chain.request();
      // Here where we&#39;ll try to refresh token.
      // with an retrofit call
      // After we succeed we&#39;ll proceed our request
      Response response = chain.proceed(request);
      return response;
    }
    }

How can i add headers to request in my interceptor?

I tried this but i am making mistake and i lose my request when creating new request:

        public class RequestTokenInterceptor implements Interceptor {
        @Override
        public Response intercept(Interceptor.Chain chain) throws IOException {
            Request request = chain.request();
            Request newRequest;

            try {
                Log.d(&quot;addHeader&quot;, &quot;Before&quot;);
                String token = TokenProvider.getInstance(mContext).getToken();
                newRequest = request.newBuilder()
                        .addHeader(HeadersContract.HEADER_AUTHONRIZATION, O_AUTH_AUTHENTICATION + token)
                        .addHeader(HeadersContract.HEADER_CLIENT_ID, CLIENT_ID)
                        .build();
            } catch (Exception e) {
                Log.d(&quot;addHeader&quot;, &quot;Error&quot;);
                e.printStackTrace();
                return chain.proceed(request);
            }

            Log.d(&quot;addHeader&quot;, &quot;after&quot;);
            return chain.proceed(newRequest);
        }
    }

Note that, i know i can add header when creating request like this:

    Request request = new Request.Builder()
        .url(&quot;https://api.github.com/repos/square/okhttp/issues&quot;)
        .header(&quot;User-Agent&quot;, &quot;OkHttp Headers.java&quot;)
        .addHeader(&quot;Accept&quot;, &quot;application/json; q=0.5&quot;)
        .addHeader(&quot;Accept&quot;, &quot;application/vnd.github.v3+json&quot;)
        .build();

But it doesn&#39;t fit my needs. I need it in interceptor.

How to add headers to OkHttp request interceptor?

I read some examples which are posting jsons to the server.

some one says :

&gt; OkHttp is an implementation of the HttpUrlConnection interface
&gt; provided by Java. It provides an input stream for writing content and
&gt; doesn&#39;t know (or care) about what format that content is.


Now I want to make a normal post to the URL with params of name and password.

It means I need to do encode the name and value pair into stream by myself?

How to use OKHTTP to make a post request?

I&#39;m trying to use `Retrofit2`, 
I want to add `Token` to my `Header` Like this:

`Authorization: Bearer  Token`
but the `code` below doesn&#39;t work:

    public interface APIService {
        @Headers({&quot;Authorization&quot;, &quot;Bearer &quot;+ token})
        @GET(&quot;api/Profiles/GetProfile?id={id}&quot;)
        Call&lt;UserProfile&gt; getUser(@Path(&quot;id&quot;) String id);
    }

My server is `asp.net webApi`. Please help what should I do?

Retrofit2 Authorization - Global Interceptor for access token

I&#39;m trying to get some json data using OkHttp and can&#39;t figure out why when i try logging the `response.body().toString()` what i get is `Results:﹕ com.squareup.okhttp.Call$RealResponseBody@41c16aa8`


    try {
            URL url = new URL(BaseUrl);
            OkHttpClient client = new OkHttpClient();
            Request request = new Request.Builder()
                    .url(url)
                    .header(/****/)
                    .build();

            Call call = client.newCall(request);
            Response response = call.execute();

            **//for some reason this successfully prints out the response**
            System.out.println(&quot;YEAH: &quot; + response.body().string());

            if(!response.isSuccessful()) {
                Log.i(&quot;Response code&quot;, &quot; &quot; + response.code());
            }

            Log.i(&quot;Response code&quot;, response.code() + &quot; &quot;);
            String results = response.body().toString();

            Log.i(&quot;OkHTTP Results: &quot;, results);

![Log][1]


  [1]: http://i.stack.imgur.com/xS2M3.png


I don&#39;t know what i&#39;m doing wrong here. How do i get the response string?

Can&#39;t get OkHttp&#39;s response.body.toString() to return a string

I did not find any example of how to replace the deprecation method.
The examples on the okhttp3 main page are old.
This is one of them:

	public static final MediaType JSON = MediaType.get(&quot;application/json; charset=utf-8&quot;);

	OkHttpClient client = new OkHttpClient();

	String post(String url, String json) throws IOException {
	    RequestBody body = RequestBody.create(JSON, json);
	      Request request = new Request.Builder()
	          .url(url)
	          .post(body)
	          .build();
	  try (Response response = client.newCall(request).execute()) {
	    return response.body().string();
	  }
	}

If someone could solve it, I would appreciate your help.

Update:
     I&#39;m using &#39;com.squareup.okhttp3:okhttp:4.0.1&#39;


Okhttp3 - RequestBody.create(contentType, content) Deprecated

I am using Retrofit/OkHttp (1.6) in my Android project. 

I don&#39;t find any request retry mechanism built-in to either of them. On searching more, I read OkHttp seems to have silent-retries. I don&#39;t see that happening on any of my connections (HTTP or HTTPS). How to configure retries with okclient ? 

For now, I am catching exceptions and retrying maintaining a counter variable.

How to retry HTTP requests with OkHttp/Retrofit?

I&#39;m using an interceptor, and I would like to log the body of a request I&#39;m making but I can&#39;t see any way of doing this. 

Is it possible ?

    public class LoggingInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
    
            long t1 = System.nanoTime();
            Response response = chain.proceed(request);
            long t2 = System.nanoTime();
    
            double time = (t2 - t1) / 1e6d;
    
            if (request.method().equals(&quot;GET&quot;)) {
                Logs.info(String.format(&quot;GET &quot; + F_REQUEST_WITHOUT_BODY + F_RESPONSE_WITH_BODY, request.url(), time, request.headers(), response.code(), response.headers(), response.body().charStream()));
            } else if (request.method().equals(&quot;POST&quot;)) {
                Logs.info(String.format(&quot;POST &quot; + F_REQUEST_WITH_BODY + F_RESPONSE_WITH_BODY, request.url(), time, request.headers(), request.body(), response.code(), response.headers(), response.body().charStream()));
            } else if (request.method().equals(&quot;PUT&quot;)) {
                Logs.info(String.format(&quot;PUT &quot; + F_REQUEST_WITH_BODY + F_RESPONSE_WITH_BODY, request.url(), time, request.headers(), request.body().toString(), response.code(), response.headers(), response.body().charStream()));
            } else if (request.method().equals(&quot;DELETE&quot;)) {
                Logs.info(String.format(&quot;DELETE &quot; + F_REQUEST_WITHOUT_BODY + F_RESPONSE_WITHOUT_BODY, request.url(), time, request.headers(), response.code(), response.headers()));
            }
    
            return response;
        }
    }

and the result : 


    POST  [some url] in 88,7ms
        ZoneName: touraine
        Source: Android
        body: retrofit.client.OkClient$1@1df53f05 &lt;-request.body().toString() gives me this, but I would like the content string
        Response: 500
        Date: Tue, 24 Feb 2015 10:14:22 GMT
        body: [some content] 



OkHttp how to log request body

I&#39;m working for a customer who has a server with self-signed SSL cert.

I&#39;m using Retrofit + CustomClient using wrapped OkHttp client:

    RestAdapter restAdapter = new RestAdapter.Builder().setEndpoint(Config.BASE_URL + Config.API_VERSION)
        .setClient(new CustomClient(new OkClient(), context))
        .build();

Does OkHttp support calling Self-Signed SSL cert server by default?

By the way. Which client is using Retrofit by default? I thought it was OkHttp but when I researched a bit more I realized I needed to import OkHttp dependencies

Does OkHttp support accepting self-signed SSL certs?

I am using OKHTTP client for networking in my android application. 

[This][1] example shows how to upload binary file. I would like to know how to get inputstream of binary file downloading with OKHTTP client.

Here is the listing of the example :

    public class InputStreamRequestBody extends RequestBody {
    
        private InputStream inputStream;
        private MediaType mediaType;
    
        public static RequestBody create(final MediaType mediaType, 
                final InputStream inputStream) {
            return new InputStreamRequestBody(inputStream, mediaType);
        }
    
        private InputStreamRequestBody(InputStream inputStream, MediaType mediaType) {
            this.inputStream = inputStream;
            this.mediaType = mediaType;
        }
    
        @Override
        public MediaType contentType() {
            return mediaType;
        }
    
        @Override
        public long contentLength() {
            try {
                return inputStream.available();
            } catch (IOException e) {
                return 0;
            }
        }
    
        @Override
        public void writeTo(BufferedSink sink) throws IOException {
            Source source = null;
            try {
                source = Okio.source(inputStream);
                sink.writeAll(source);
            } finally {
                Util.closeQuietly(source);
            }
        }
    }



Current code for simple get request is:

    OkHttpClient client = new OkHttpClient();
    request = new Request.Builder().url(&quot;URL string here&quot;)
                        .addHeader(&quot;X-CSRFToken&quot;, csrftoken)
                        .addHeader(&quot;Content-Type&quot;, &quot;application/json&quot;)
                        .build();
    response = getClient().newCall(request).execute();

Now how do I convert the response to `InputStream`. Something similar to response from `Apache HTTP Client` like this for `OkHttp` response:

    InputStream is = response.getEntity().getContent();
    

---- 

### EDIT


Accepted answer from below.
My modified code:

    request = new Request.Builder().url(urlString).build();
    response = getClient().newCall(request).execute();

    InputStream is = response.body().byteStream();

    BufferedInputStream input = new BufferedInputStream(is);
    OutputStream output = new FileOutputStream(file);

    byte[] data = new byte[1024];

    long total = 0;

    while ((count = input.read(data)) != -1) {
        total += count;
        output.write(data, 0, count);
    }

    output.flush();
    output.close();
    input.close();


  [1]: https://stackoverflow.com/questions/25367888/upload-binary-file-with-okhttp-from-resources

Download binary file from OKHTTP

So, back when I was using Koush&#39;s Ion, I was able to add a json body to my posts with a simple `.setJsonObjectBody(json).asJsonObject()`

I&#39;m moving over to OkHttp, and I really don&#39;t see a good way to do that. I&#39;m getting error 400&#39;s all over the place.

Anyone have any ideas?

I&#39;ve even tried manually formatting it as a json string.

    String reason = menuItem.getTitle().toString();
    JsonObject json = new JsonObject();
    json.addProperty(&quot;Reason&quot;, reason);

    String url = mBaseUrl + &quot;/&quot; + id + &quot;/report&quot;;

    Request request = new Request.Builder()
            .header(&quot;X-Client-Type&quot;, &quot;Android&quot;)
            .url(url)
            .post(RequestBody
                    .create(MediaType
                        .parse(&quot;application/json&quot;),
                            &quot;{\&quot;Reason\&quot;: \&quot;&quot; + reason + &quot;\&quot;}&quot;
                    ))
            .build();

    client.newCall(request).enqueue(new com.squareup.okhttp.Callback() {
        @Override
        public void onFailure(Request request, IOException throwable) {
            throwable.printStackTrace();
        }

        @Override
        public void onResponse(Response response) throws IOException {
            if (!response.isSuccessful()) throw new IOException(
                    &quot;Unexpected code &quot; + response);
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(context, &quot;Report Received&quot;, Toast.LENGTH_SHORT).show();
                }
            });
        }
    });

    /*Ion.with(getContext(), url)
            .setHeader(&quot;X-Client-Type&quot;, &quot;Android&quot;)
            .setJsonObjectBody(json)
            .asJsonObject()
            .setCallback(new FutureCallback&lt;JsonObject&gt;() {
                @Override
                public void onCompleted(Exception e, JsonObject result) {
                    Toast.makeText(context, &quot;Report Received&quot;, Toast.LENGTH_SHORT).show();
                }
            });*/

OkHttp Post Body as JSON

I&#39;m using the OkHttp library for a new project and am impressed with its ease of use.  I now have a need to use Basic Authentication.  Unfortunately, there is a dearth of working sample code.  I&#39;m seeking an example of how to pass username / password credentials to the OkAuthenticator when an HTTP 401 header is encountered.  I viewed this answer:

https://stackoverflow.com/questions/21370620/retrofit-post-request-w-basic-http-authentication-cannot-retry-streamed-http

but it didn&#39;t get me too far.  The samples on the [OkHttp github repo](https://github.com/square/okhttp) didn&#39;t feature an authentication-based sample either.  Does anyone have a gist or other code sample to get me pointed in the right direction?  Thanks for your assistance!

Android OkHttp with Basic Authentication

Our clients are starting to see 100s of these &quot;SSLException error - Connection reset by peer&quot; over the last couple of weeks and I can&#39;t figure out why

1. We&#39;re using Retrofit with okhttp, no special configuration

        public class OkHttpClientProvider implements IOkHttpClientProvider {

            OkHttpClient okHttpClient;

            public OkHttpClientProvider() {
                this.okHttpClient = createClient();
            }

            public OkHttpClient getOkHttpClient() {
                return this.okHttpClient;
            }

            private OkHttpClient createClient() {
                return new OkHttpClient();
            }
        }

The above client provider is a singleton. The RestAdapter is built using this injected client (we use dagger) - 

    RestAdapter.Builder restAdapterBuilder = new RestAdapter.Builder()
                                            .setConverter(converter)
                                            .setEndpoint(networkRequestDetails.getServerUrl())
                                            .setClient(new OkClient(okHttpClientProvider.getOkHttpClient()))
                                            .setErrorHandler(new NetworkSynchronousErrorHandler(eventBus))
                                            );

Based on stack overflow solutions what I&#39;ve found out - 

1. The keep alive duration on the server is 180 seconds, OkHttp has a default of 300 seconds

2. The server returns &quot;Connection: close&quot; in its header but the client request sends &quot;Connection: keepAlive&quot;

3. The server supports TLS 1.0 / 1.1 / 1.2 and uses Open SSL

4. Our servers have moved to another hosting provider recently in another geography so I don&#39;t know if these are DNS failures or not

5. We&#39;ve tried tweaking things like keepAlive, reconfigured OpenSSL on the server but for some reason the Android client keeps getting this error

6. It happens immediately without any delay when you try to use the app to post something or pull to refresh (it doesn&#39;t even go to network or have a delay before this exception happens which would imply the connection is already broken). But trying it multiple times somehow &quot;fixes it&quot; and we get a success. It happens again later

7. We&#39;ve invalidated our DNS entries on the server to see if this what caused it but that hasn&#39;t helped

8. It mostly happens on LTE but I&#39;ve seen it on Wifi as well

I don&#39;t want to disable keep alive because most modern clients don&#39;t do that. Also we&#39;re using OkHttp 2.4  and this is a problem on post Ice cream sandwich devices so I&#39;m hoping it should take care of these underlying networking issues. The iOS client also gets these exceptions but close to a 100 times less (iOS client uses AFNetworking 2.0). I&#39;m struggling to find new things to try at this point, any help / ideas?

**Update - Adding full stack trace through okhttp**

          retrofit.RetrofitError: Read error: ssl=0x9dd07200: I/O error during system call, Connection reset by peer
                  at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:390)
                  at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:240)
                  at java.lang.reflect.Proxy.invoke(Proxy.java:397)
                  at $Proxy15.getAccessTokenUsingResourceOwnerPasswordCredentials(Unknown Source)
                  at com.company.droid.repository.network.NetworkRepository.getAccessTokenUsingResourceOwnerPasswordCredentials(NetworkRepository.java:76)
                  at com.company.droid.ui.login.LoginTask.doInBackground(LoginTask.java:88)
                  at com.company.droid.ui.login.LoginTask.doInBackground(LoginTask.java:23)
                  at android.os.AsyncTask$2.call(AsyncTask.java:292)
                  at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
                  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
                  at java.lang.Thread.run(Thread.java:818)
           Caused by: javax.net.ssl.SSLException: Read error: ssl=0x9dd07200: I/O error during system call, Connection reset by peer
                  at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method)
                  at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:699)
                  at okio.Okio$2.read(Okio.java:137)
                  at okio.AsyncTimeout$2.read(AsyncTimeout.java:211)
                  at okio.RealBufferedSource.indexOf(RealBufferedSource.java:306)
                  at okio.RealBufferedSource.indexOf(RealBufferedSource.java:300)
                  at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:196)
                  at com.squareup.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:191)
                  at com.squareup.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:80)
                  at com.squareup.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:917)
                  at com.squareup.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:793)
                  at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:439)
                  at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:384)
                  at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:497)
                  at com.squareup.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseCode(DelegatingHttpsURLConnection.java:105)
                  at com.squareup.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:25)
                  at retrofit.client.UrlConnectionClient.readResponse(UrlConnectionClient.java:73)
                  at retrofit.client.UrlConnectionClient.execute(UrlConnectionClient.java:38)
                  at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:321)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:240)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at java.lang.reflect.Proxy.invoke(Proxy.java:397)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at $Proxy15.getAccessTokenUsingResourceOwnerPasswordCredentials(Unknown Source)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at com.company.droid.repository.network.NetworkRepository.getAccessTokenUsingResourceOwnerPasswordCredentials(NetworkRepository.java:76)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at com.company.droid.ui.login.LoginTask.doInBackground(LoginTask.java:88)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at com.company.droid.ui.login.LoginTask.doInBackground(LoginTask.java:23)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at android.os.AsyncTask$2.call(AsyncTask.java:292)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at java.util.concurrent.FutureTask.run(FutureTask.java:237)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;at java.lang.Thread.run(Thread.java:818)
          ]}

javax.net.ssl.SSLException: Read error: ssl=0x9524b800: I/O error during system call, Connection reset by peer

***Solution***:
It was a mistake on my side.

The right way is **response.body().string()** other than **response.body.toString()**

Im using Jetty servlet, the URL is`http://172.16.10.126:8789/test/path/jsonpage`, every time request this URL it will return 

    {&quot;employees&quot;:[
        {&quot;firstName&quot;:&quot;John&quot;, &quot;lastName&quot;:&quot;Doe&quot;}, 
        {&quot;firstName&quot;:&quot;Anna&quot;, &quot;lastName&quot;:&quot;Smith&quot;},
        {&quot;firstName&quot;:&quot;Peter&quot;, &quot;lastName&quot;:&quot;Jones&quot;}
    ]}

It shows up when type the url into a browser, unfortunately it shows kind of memory address other than the json string when I request with `Okhttp`.

    TestActivity﹕ com.squareup.okhttp.internal.http.RealResponseBody@537a7f84




The Okhttp code Im using:

    OkHttpClient client = new OkHttpClient();
    
    String run(String url) throws IOException {
      Request request = new Request.Builder()
          .url(url)
          .build();
    
      Response response = client.newCall(request).execute();
      return response.body().string();
    }



Can anyone helpe?

How does OkHttp get Json string?

I have created a helper class to handle all of my http calls in my app. It is a simple singleton wrapper for okhttp that looks like this (I have omitted some unimportant parts):


    public class HttpUtil {
    
        private OkHttpClient client;
        private Request.Builder builder;

        ...

        public void get(String url, HttpCallback cb) {
            call(&quot;GET&quot;, url, cb);
        }
    
        public void post(String url, HttpCallback cb) {
            call(&quot;POST&quot;, url, cb);
        }
    
        private void call(String method, String url, final HttpCallback cb) {
            Request request = builder.url(url).method(method, method.equals(&quot;GET&quot;) ? null : new RequestBody() {
                // don&#39;t care much about request body
                @Override
                public MediaType contentType() {
                    return null;
                }
    
                @Override
                public void writeTo(BufferedSink sink) throws IOException {
    
                }
            }).build();
          
            client.newCall(request).enqueue(new Callback() {
                @Override
                public void onFailure(Request request, Throwable throwable) {
                    cb.onFailure(null, throwable);
                }
    
                @Override
                public void onResponse(Response response) throws IOException {
                    if (!response.isSuccessful()) {
                        cb.onFailure(response, null);
                        return;
                    }
                    cb.onSuccess(response);
                }
            });
        }
    
    
        public interface HttpCallback  {
    
            /**
             * called when the server response was not 2xx or when an exception was thrown in the process
             * @param response - in case of server error (4xx, 5xx) this contains the server response
             *                 in case of IO exception this is null
             * @param throwable - contains the exception. in case of server error (4xx, 5xx) this is null
             */
            public void onFailure(Response response, Throwable throwable);
    
            /**
             * contains the server response
             * @param response
             */
            public void onSuccess(Response response);
        }
    
    }

Then, in my main activity, I use this helper class :

    HttpUtil.get(url, new HttpUtil.HttpCallback() {
                @Override
                public void onFailure(Response response, Throwable throwable) {
                    // handle failure
                }
    
                @Override
                public void onSuccess(Response response) {
                    // &lt;-------- Do some view manipulation here
                }
            });

`onSuccess` throws an exception when the code runs :

&gt; android.view.ViewRootImpl$CalledFromWrongThreadException: Only the
&gt; original thread that created a view hierarchy can touch its views.

From my understanding, Okhttp callbacks run on the main thread so why do I get this error ? 

** Just as a side note, I have created `HttpCallback` interface to wrap Okhttp&#39;s `Callback` class because I wanted to change the behaviour of `onResponse` and `onFailure` so I could unite the logic of handling failed responses due to i/o exception and failed responses due to server problems.


Thanks.




Okhttp response callbacks on the main thread

I am creating an android application which uses `https` for communication with the server. I am using `retrofit` and `OkHttp` for making requests. These works fine for standard `http` requests. The following are the steps that I followed.

**Step 1 :**
Acquired the cert file from the server using the command

    echo -n | openssl s_client -connect api.****.tk:443 | sed -ne &#39;/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p&#39; &gt; gtux.cert

**Step 2 :**
Converted the cert to a BKS format by using the following commands

    keytool -importcert -v -trustcacerts -file &quot;gtux.cert&quot; -alias imeto_alias -keystore &quot;my_keystore.bks&quot; -provider org.bouncycastle.jce.provider.BouncyCastleProvider -providerpath &quot;bcprov-jdk16-146.jar&quot; -storetype BKS

It asked me for password and the file was successfully created.

**Step 3 :**

Create a OkHttpClient and use the same for making https requests

    public class MySSLTrust {
    public static OkHttpClient trustcert(Context context){
        OkHttpClient okHttpClient = new OkHttpClient();
        try {
            KeyStore ksTrust = KeyStore.getInstance(&quot;BKS&quot;);
            InputStream instream = context.getResources().openRawResource(R.raw.my_keystore);
            ksTrust.load(instream, &quot;secret&quot;.toCharArray());
            // TrustManager decides which certificate authorities to use.
            TrustManagerFactory tmf = TrustManagerFactory
                    .getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(ksTrust);
            SSLContext sslContext = SSLContext.getInstance(&quot;TLS&quot;);
            sslContext.init(null, tmf.getTrustManagers(), null);
            okHttpClient.setSslSocketFactory(sslContext.getSocketFactory());
        } catch (KeyStoreException | IOException | NoSuchAlgorithmException | CertificateException | KeyManagementException e) {
            e.printStackTrace();
        }
        return okHttpClient;
    }
    }

**Step 4:**

RestAdapter has to be created

    RestAdapter.Builder()
    .setRequestInterceptor(intercept)
    .setEndpoint(&quot;https://api.****.tk&quot;)
    .setClient(new OkClient(this))
    .setLogLevel(RestAdapter.LogLevel.FULL)
    .setLog(new AndroidLog(&quot;RETROFIT&quot;))
    .build();

But finally when run the app it is throwing me `CertPathValidatorException : Trust anchor for certificate path not found`. Please help me to solve this. Thank you. 

**Other failure attempts :**
Tried to install the certificate in my Xperia Z2 and it says the file was installed but when i run the app the same exception is thrown. 

**Error Log**
Here is the error log that I got on executing... 

[Error Log][1]

Pasted there so that it will be easy to read..


  [1]: https://paste.ee/p/5tZP3

CertPathValidatorException : Trust anchor for certificate path not found - Retrofit Android

I have the following setup:

    final OkHttpClient okHttpClient = new OkHttpClient();
    okHttpClient.setReadTimeout(5, TimeUnit.SECONDS);
    okHttpClient.setConnectTimeout(5, TimeUnit.SECONDS);

    RestAdapter.Builder builder = new RestAdapter.Builder()
            .setEndpoint(ROOT)
            .setClient(new OkClient(okHttpClient))
            .setLogLevel(RestAdapter.LogLevel.FULL);

I am trying to handle the situation in which my server is down and the user gets a connection timeout exception, this is my logging:

    java.net.SocketTimeoutException: failed to connect to /192.168.0.53 (port 3000) after 5000ms

Full logging: http://pastebin.com/gscCGb7x

Is there a way to route this into the retrofit failure method so I can handle it over there?

Thanks in advance!

Retrofit 2: Catch connection timeout exception

How is it possible that I get this message? It does not make any sense. 
I&#39;m using `com.squareup.retrofit2:retrofit:2.9.0`

         Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 30
        at okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported(AndroidPlatform.kt:370)
        at okhttp3.internal.platform.Platform$Companion.findPlatform(Platform.kt:204)
        at okhttp3.internal.platform.Platform$Companion.access$findPlatform(Platform.kt:178)
        2020-09-16 12:37:07.645 6480-6480/lv.ltt.gasogmp.dev_v3 E/AndroidRuntime:     at 
        okhttp3.internal.platform.Platform.&lt;clinit&gt;(Platform.kt:179)

Expected Android API level 21+ but was 30

Stetho and Google Chrome DevTools have become unusable after a macOS update (I doubt that macOS update is the origin of this bug, but I prefer to mention it).

Here is the appearance of DevTools after the open of &quot;inspect mode&quot; on a device (provided by Facebook Stetho library for Android &amp; OKHttp).

![DevTools window](https://i.stack.imgur.com/8AK7W.png)


There are no longer &quot;CSS&quot; stylesheets on the page and fonts have changed.
Many tab pages aren&#39;t displayed (i.e. Network Requests), I only have access to some error messages :

```
There were 84 bytes that were not consumed while processing request 4
There were 84 bytes that were not consumed while processing request 5
There were 84 bytes that were not consumed while processing request 6
Failed to clear temp storage: undefined
```

I followed instructions on this issue : https://stackoverflow.com/questions/31358446/failed-to-clear-temp-storage/35172470 and this one : https://stackoverflow.com/questions/36850053/failed-to-clear-temp-storage-securityerror-in-chrome?noredirect=1&amp;lq=1 but I haven&#39;t been able to fix the problem. 

Here is what I tried :
 - Uninstall and reinstall Chrome with AppCleaner
 - Remove chrome cache from disk
 - Remove chrome profiles from `~/Library/Application\ Support/Google/Chrome`
 - Create and use a new Chrome profile
 - Try to connect on Firefox distant debug (unfonctionnal)
 - Restart system

Have any of you ever encountered this problem ?
Thanks !



Chrome DevTools broken - Stetho unusable

I am trying to add token based authentication via Retrofit 2.0-beta3 and OkHttpClient in Android using interceptors. But I get   UnsupportedOperationException when I add my interceptor in OkHttpClient.
Here is my code:
In ApiClient.java 
    
    public static TrequantApiInterface getClient(final String token) {
            if( sTreqantApiInterface == null) {
    
                Log.v(RETROFIT_LOG, &quot;Creating api client for the first time&quot;);
                OkHttpClient okClient = new OkHttpClient();
    
                okClient.interceptors().add(new Interceptor() {
                    @Override
                    public Response intercept(Interceptor.Chain chain) throws IOException {
                        Request original = chain.request();
    
                        // Request customization: add request headers
                        Request.Builder requestBuilder = original.newBuilder()
                                .header(&quot;Authorization&quot;, token)
                                .method(original.method(), original.body());
    
                        Request request = requestBuilder.build();
                        return chain.proceed(request);
                    }
                });
    
                Retrofit client = new Retrofit.Builder()
                        .baseUrl(baseUrl)
                        .client(okClient)
                        .addConverterFactory(GsonConverterFactory.create())
                        .build();
                sTreqantApiInterface = client.create(TrequantApiInterface.class);
            }
            return sTreqantApiInterface;
        }
And I use it like: 

    private void ampFreqTest(){
        String token = getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE)
                            .getString(getString(R.string.key_token), &quot;&quot;);
    
        service = ApiClient.getClient(token);
        //I get an exception on this line:
        Call&lt;List&lt;AmpFreq&gt;&gt; call = service.getUserAmpFreq(&quot;1&quot;);
        call.enqueue(new Callback&lt;List&lt;AmpFreq&gt;&gt;() {
            @Override
            public void onResponse(Response&lt;List&lt;AmpFreq&gt;&gt; response) {
                Toast.makeText(HomeScreen.this, &quot;Got result&quot;, Toast.LENGTH_LONG);
    
                Log.v(ApiClient.RETROFIT_LOG, &quot;Success api client.&quot; + response.message());
                Log.v(ApiClient.RETROFIT_LOG, &quot;Success api client.&quot;);
            }
            @Override
            public void onFailure(Throwable t) {
                Toast.makeText(HomeScreen.this, t.getMessage() , Toast.LENGTH_LONG);
                Log.v(ApiClient.RETROFIT_LOG, &quot;Fail api client.&quot; + t.getMessage() );
            }
        });
    }

But I get this error:

    Process: com.trequant.usman.trequant_android, PID: 14400
    java.lang.UnsupportedOperationException at java.util.Collections$UnmodifiableCollection.add(Collections.java:932)
     at com.trequant.usman.trequant_android.api.ApiClient.getClient(ApiClient.java:41)

It gives me error on adding a new interceptor saying that it is not modifiableCollection but the documentation for interceptors() function says: /**

       * Returns a modifiable list of interceptors that observe the full span of each call: from before
       * the connection is established (if any) until after the response source is selected (either the
       * origin server, cache, or both).
       */
What am I doing wrong? Could it be a bug? 



Unsupported operation: Android, Retrofit, OkHttp. Adding interceptor in OkHttpClient

I am using okhttp 2.0 in my Android app and didn&#39;t find a way to set some common User Agent for all outgoing requests.

I thought I could do something like

    OkHttpClient client = new OkHttpClient();
    client.setDefaultUserAgent(...)

...but there&#39;s no such method or similar.
Of course I could provide some extension utility method which would wrap a RequestBuilder to attach `.header(&quot;UserAgent&quot;)` and then I would use it for building all my requests, but I thought maybe I missed some existing and simpler way?

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