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package com.algolia.internal.interceptors;
import java.io.IOException;
import javax.annotation.Nonnull;
import okhttp3.*;
import okio.BufferedSink;
import okio.GzipSink;
import okio.Okio;
/** This interceptor compresses the HTTP request body. */
public final class GzipRequestInterceptor implements Interceptor {
@Nonnull
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Request originalRequest = chain.request();
if (originalRequest.body() == null || originalRequest.header("Content-Encoding") != null) {
return chain.proceed(originalRequest);
}
Request compressedRequest = originalRequest
.newBuilder()
.header("Content-Encoding", "gzip")
.method(originalRequest.method(), gzip(originalRequest.body()))
.build();
return chain.proceed(compressedRequest);
}
private RequestBody gzip(final RequestBody body) {
return new RequestBody() {
@Override
public MediaType contentType() {
return body.contentType();
}
@Override
public long contentLength() {
return -1; // We don't know the compressed length in advance!
}
@Override
public void writeTo(@Nonnull BufferedSink sink) throws IOException {
BufferedSink gzipSink = Okio.buffer(new GzipSink(sink));
body.writeTo(gzipSink);
gzipSink.close();
}
};
}
}
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