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Moesif Java OkHttp Interceptor SDK
package com.moesif.sdk.okhttp3client;
import com.moesif.api.models.EventRequestModel;
import com.moesif.api.models.EventResponseModel;
import com.moesif.sdk.okhttp3client.config.MoesifApiConnConfig;
import com.moesif.sdk.okhttp3client.models.OkHttp3RequestMapper;
import com.moesif.sdk.okhttp3client.models.OkHttp3ResponseMapper;
import com.moesif.sdk.okhttp3client.models.filter.IInterceptEventFilter;
import com.moesif.sdk.okhttp3client.util.ResponseWrap;
import com.moesif.external.facebook.stetho.inspector.network.NetworkEventReporterMoesifImpl;
import com.moesif.external.facebook.stetho.inspector.network.NetworkEventReporterMoesif;
import okhttp3.*;
import okio.BufferedSource;
import okio.Okio;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.Date;
import java.util.concurrent.atomic.AtomicInteger;
import java.time.Instant;
/**
* MoesifOkHttp3Interceptor
* This intrceptor can be used both as Application and Network interceptor
*
* OkHttpClient client = new OkHttpClient.Builder()
* .addInterceptor(new MoesifOkHttp3Interceptor())
* .build();
*
* https://square.github.io/okhttp/interceptors/
* Credit: adopted from Facebook/Stetho StethoInterceptor.java
*/
public class MoesifOkHttp3Interceptor implements Interceptor {
private static final Logger logger = LoggerFactory.getLogger(
MoesifOkHttp3Interceptor.class);
private final NetworkEventReporterMoesif mEventReporter =
NetworkEventReporterMoesifImpl.get();
private final AtomicInteger mNextRequestId = new AtomicInteger(0);
private static MoesifApiConnConfig connConfig;
/**
* Initialize the Interceptor
* Without parameters uses default: Look for Moesif App Id environment vars
*/
public MoesifOkHttp3Interceptor() {
init(null);
}
/**
* Initialize the Interceptor
* @param moesifApplicationId String Moesif application Id.
* Supercedes any environment variables
*/
public MoesifOkHttp3Interceptor(String moesifApplicationId) {
init(new MoesifApiConnConfig(moesifApplicationId));
}
/**
* Initialize the Interceptor
* @param moesifApplicationId String Moesif Application Id
* @param eventsBufferSize How many events to queue in buffer prior to send
* to collector
*/
public MoesifOkHttp3Interceptor(String moesifApplicationId, Integer eventsBufferSize) {
MoesifApiConnConfig c = new MoesifApiConnConfig(moesifApplicationId);
c.setEventsBufferSize(eventsBufferSize);
init(c);
}
/**
* Initialize the Interceptor
* @param eventsBufferSize How many events to queue in buffer prior to send
* to collector
*/
public MoesifOkHttp3Interceptor(Integer eventsBufferSize) {
MoesifApiConnConfig c = new MoesifApiConnConfig(null);
c.setEventsBufferSize(eventsBufferSize);
init(c);
}
/**
* Initialize the Interceptor
* @param connConfig MoesifApiConnConfig object
*/
public MoesifOkHttp3Interceptor(MoesifApiConnConfig connConfig) {
init(connConfig);
}
public void init(MoesifApiConnConfig connConfig) {
this.connConfig = (null == connConfig)
? new MoesifApiConnConfig() : connConfig;
}
public MoesifApiConnConfig getConnConfig(){
return this.connConfig;
}
/**
* This is the main entrypoint for Interceptor
* For Application Interceptors - called once only
* For Network Interceptors - maybe called more than once
* such as first for HTTP 301 and then for the redirect call.
* Or multiple times for authentication scenarios
* @param chain chain
* @return Response object
* @throws IOException IOException
*/
@Override
public Response intercept(Chain chain) throws IOException {
final String requestId =
String.valueOf(mNextRequestId.getAndIncrement());
final Request request = chain.request();
Response response;
try {
response = chain.proceed(request);
} catch (IOException e) {
logger.warn("IOException in chain cannot proceed", e.getMessage());
throw e;
}
if (connConfig.getEventFilterConfig().skip(request, response))
return response;
// Initialize the request/response time from the response.
Date requestDate = null;
Date responseDate = null;
try {
Instant utcInstance = Instant.ofEpochMilli(response.sentRequestAtMillis()); // UTC
requestDate = java.util.Date.from(utcInstance);
} catch (Exception e) {
requestDate = new Date();
}
try {
Instant utcInstance = Instant.ofEpochMilli(response.receivedResponseAtMillis()); // UTC
responseDate = java.util.Date.from(utcInstance);
} catch (Exception e) {
responseDate = new Date();
}
IInterceptEventFilter filter = connConfig.getEventFilterConfig();
final EventRequestModel loggedRequest =
OkHttp3RequestMapper.createOkHttp3Request(
request,
requestDate,
filter.getApiVersion(request, response).orElse(null),
connConfig.getBaseUri(),
connConfig.getMaxAllowedBodyBytesRequest()
);
final Connection connection = chain.connection();
ResponseWrap respw = new ResponseWrap(response);
final EventResponseModel loggedResponse =
OkHttp3ResponseMapper.createOkHttp3Response(
response,
responseDate,
connection
);
if (!respw.hasNullBody()) {
try {
final ByteArrayOutputStream outputStream = genBAOutputStream(respw);
MoesifResponseHandler moeRespHandler = new MoesifResponseHandler(
loggedRequest,
loggedResponse,
outputStream,
respw.isJsonHeader(),
connConfig.getApplicationId(),
connConfig.getMaxAllowedBodyBytesResponse(),
connConfig.getEventsBufferSize(),
filter.identifyUser(request, response).orElse(null),
filter.identifyCompany(request, response).orElse(null),
filter.sessionToken(request, response).orElse(null),
filter.getMetadata(request, response),
connConfig.getEventFilterConfig());
InputStream responseStream = mEventReporter
.interpretResponseStream(
requestId,
respw.getBodyContentType(),
respw.getContentEncoding(),
genBodyByteIS(respw, connConfig),
moeRespHandler,
outputStream
);
if (responseStream != null) {
response = response.newBuilder()
.body(new ForwardingResponseBody(
response.body(),
responseStream)
)
.build();
}
} catch (Exception e) {
logger.warn("Error parsing response body", e);
}
}
else {
logger.warn("Body is null");
}
return response;
}
private static ByteArrayOutputStream genBAOutputStream(ResponseWrap respw){
int outStreamSize = (int) respw.getBodyContentLength();
return outStreamSize > 0
? new ByteArrayOutputStream(outStreamSize)
: new ByteArrayOutputStream();
}
private static InputStream genBodyByteIS(ResponseWrap respw,
MoesifApiConnConfig connConfig){
return isAllowedContentType(respw.getBodyContentType(),
connConfig.getBodyContentTypesBlackList())
? respw.getBodyByteInputStream()
: null;
}
/**
* Checks whether Content-Type is contained in blockedContentTypes
* @param cTypeToCheck The content-type to check
* @param blockedContentTypes Blocked content types
* @return boolean whether content type is either not specified or not blocked.
*/
public static boolean isAllowedContentType(String cTypeToCheck,
Collection blockedContentTypes){
return StringUtils.isBlank(cTypeToCheck)
|| CollectionUtils.isEmpty(blockedContentTypes)
|| !blockedContentTypes.contains(cTypeToCheck.toLowerCase());
}
private static class ForwardingResponseBody extends ResponseBody {
private final ResponseBody mBody;
private final BufferedSource mInterceptedSource;
public ForwardingResponseBody(ResponseBody body,
InputStream interceptedStream) {
mBody = body;
mInterceptedSource = Okio.buffer(Okio.source(interceptedStream));
}
@Override
public MediaType contentType() {
return mBody.contentType();
}
@Override
public long contentLength() {
return mBody.contentLength();
}
@Override
public BufferedSource source() {
/* close on the delegating body will actually close this
intercepted source, but it was derived from mBody.byteStream()
therefore the close will be forwarded all the way to the original.
*/
return mInterceptedSource;
}
}
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