Examples with CacheStrategy okhttp3.internal.http.CacheStrategy used on opensource projects

Example 1 with CacheStrategy

use of okhttp3.internal.http.CacheStrategy in project okhttp by square.

the class URLEncodingTest method backdoorUrlToUri.

private URI backdoorUrlToUri(URL url) throws Exception {
    final AtomicReference<URI> uriReference = new AtomicReference<>();
    OkHttpClient.Builder builder = new OkHttpClient.Builder();
    Internal.instance.setCache(builder, new InternalCache() {

        @Override
        public Response get(Request request) throws IOException {
            uriReference.set(request.url().uri());
            throw new UnsupportedOperationException();
        }

        @Override
        public CacheRequest put(Response response) throws IOException {
            return null;
        }

        @Override
        public void remove(Request request) throws IOException {
        }

        @Override
        public void update(Response cached, Response network) {
        }

        @Override
        public void trackConditionalCacheHit() {
        }

        @Override
        public void trackResponse(CacheStrategy cacheStrategy) {
        }
    });
    try {
        HttpURLConnection connection = new OkUrlFactory(builder.build()).open(url);
        connection.getResponseCode();
    } catch (Exception expected) {
        if (expected.getCause() instanceof URISyntaxException) {
            expected.printStackTrace();
        }
    }
    return uriReference.get();
}

Example 2 with CacheStrategy

use of okhttp3.internal.http.CacheStrategy in project okhttp by square.

the class CacheInterceptor method intercept.

@Override
public Response intercept(Chain chain) throws IOException {
    Response cacheCandidate = cache != null ? cache.get(chain.request()) : null;
    long now = System.currentTimeMillis();
    CacheStrategy strategy = new CacheStrategy.Factory(now, chain.request(), cacheCandidate).get();
    Request networkRequest = strategy.networkRequest;
    Response cacheResponse = strategy.cacheResponse;
    if (cache != null) {
        cache.trackResponse(strategy);
    }
    if (cacheCandidate != null && cacheResponse == null) {
        // The cache candidate wasn't applicable. Close it.
        closeQuietly(cacheCandidate.body());
    }
    // If we're forbidden from using the network and the cache is insufficient, fail.
    if (networkRequest == null && cacheResponse == null) {
        return new Response.Builder().request(chain.request()).protocol(Protocol.HTTP_1_1).code(504).message("Unsatisfiable Request (only-if-cached)").body(Util.EMPTY_RESPONSE).sentRequestAtMillis(-1L).receivedResponseAtMillis(System.currentTimeMillis()).build();
    }
    // If we don't need the network, we're done.
    if (networkRequest == null) {
        return cacheResponse.newBuilder().cacheResponse(stripBody(cacheResponse)).build();
    }
    Response networkResponse = null;
    try {
        networkResponse = chain.proceed(networkRequest);
    } finally {
        // If we're crashing on I/O or otherwise, don't leak the cache body.
        if (networkResponse == null && cacheCandidate != null) {
            closeQuietly(cacheCandidate.body());
        }
    }
    // If we have a cache response too, then we're doing a conditional get.
    if (cacheResponse != null) {
        if (networkResponse.code() == HTTP_NOT_MODIFIED) {
            Response response = cacheResponse.newBuilder().headers(combine(cacheResponse.headers(), networkResponse.headers())).sentRequestAtMillis(networkResponse.sentRequestAtMillis()).receivedResponseAtMillis(networkResponse.receivedResponseAtMillis()).cacheResponse(stripBody(cacheResponse)).networkResponse(stripBody(networkResponse)).build();
            networkResponse.body().close();
            // Update the cache after combining headers but before stripping the
            // Content-Encoding header (as performed by initContentStream()).
            cache.trackConditionalCacheHit();
            cache.update(cacheResponse, response);
            return response;
        } else {
            closeQuietly(cacheResponse.body());
        }
    }
    Response response = networkResponse.newBuilder().cacheResponse(stripBody(cacheResponse)).networkResponse(stripBody(networkResponse)).build();
    if (HttpHeaders.hasBody(response)) {
        CacheRequest cacheRequest = maybeCache(response, networkResponse.request(), cache);
        response = cacheWritingResponse(cacheRequest, response);
    }
    return response;
}

Example 3 with CacheStrategy

use of okhttp3.internal.http.CacheStrategy in project edx-app-android by edx.

the class CustomCacheQueryInterceptor method intercept.

@Override
public Response intercept(@NonNull final Chain chain) throws IOException {
    final Request request = chain.request();
    Response response = chain.proceed(request);
    final String urlString = request.url().toString();
    // If the OkHttp client
    if (response.cacheResponse() != null) {
        cacheManager.remove(urlString);
    } else {
        final String cachedBody = cacheManager.get(urlString);
        if (cachedBody != null) {
            /* Since we don't cache the metadata, the cached entries should always be assumed to
                 * have a 200 response code. The body is not provided in this response, because it
                 * would only be needed if we don't have a network response.
                 */
            Response cacheResponse = response.newBuilder().code(HttpStatus.OK).message("OK").handshake(request.isHttps() ? DUMMY_HANDSHAKE : null).priorResponse(null).networkResponse(null).cacheResponse(null).body(null).build();
            final CacheStrategy cacheStrategy = new CacheStrategy.Factory(System.currentTimeMillis(), request, cacheResponse).get();
            cacheResponse = cacheStrategy.cacheResponse;
            if (cacheResponse != null) {
                /* Either querying the server is forbidden by the Cache-Control headers (if
                     * there is no network response), or they require a conditional query
                     * (otherwise). In the latter case, either the server has validated the cached
                     * response or not. Only in the last case would the network response be
                     * delivered; in the first two cases the cached response would be delivered
                     * instead.
                     */
                final Response networkResponse = response.networkResponse();
                if (networkResponse == null || shouldUseCachedResponse(cacheResponse, networkResponse)) {
                    response = response.newBuilder().code(HttpStatus.OK).cacheResponse(cacheResponse).body(ResponseBody.create(MediaType.parse("application/json"), cachedBody)).build();
                } else {
                    response = response.newBuilder().cacheResponse(cacheResponse).build();
                    if (HttpEngine.hasBody(response) && HttpMethod.invalidatesCache(request.method())) {
                        cacheManager.remove(urlString);
                    }
                }
            }
        }
    }
    return response;
}