1 files changed, 178 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/client/cache/CacheKeyGenerator.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/client/cache/CacheKeyGenerator.java
new file mode 100644
index 000000000..b0628041f
--- /dev/null
+++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/client/cache/CacheKeyGenerator.java
@@ -0,0 +1,178 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package ch.boye.httpclientandroidlib.impl.client.cache;
+
+import java.io.UnsupportedEncodingException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import ch.boye.httpclientandroidlib.Consts;
+import ch.boye.httpclientandroidlib.Header;
+import ch.boye.httpclientandroidlib.HeaderElement;
+import ch.boye.httpclientandroidlib.HttpHost;
+import ch.boye.httpclientandroidlib.HttpRequest;
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+import ch.boye.httpclientandroidlib.client.cache.HeaderConstants;
+import ch.boye.httpclientandroidlib.client.cache.HttpCacheEntry;
+import ch.boye.httpclientandroidlib.client.utils.URIUtils;
+
+/**
+ * @since 4.1
+ */
+@Immutable
+class CacheKeyGenerator {
+
+    private static final URI BASE_URI = URI.create("http://example.com/");
+
+    /**
+     * For a given {@link HttpHost} and {@link HttpRequest} get a URI from the
+     * pair that I can use as an identifier KEY into my HttpCache
+     *
+     * @param host The host for this request
+     * @param req the {@link HttpRequest}
+     * @return String the extracted URI
+     */
+    public String getURI(final HttpHost host, final HttpRequest req) {
+        if (isRelativeRequest(req)) {
+            return canonicalizeUri(String.format("%s%s", host.toString(), req.getRequestLine().getUri()));
+        }
+        return canonicalizeUri(req.getRequestLine().getUri());
+    }
+
+    public String canonicalizeUri(final String uri) {
+        try {
+            final URI normalized = URIUtils.resolve(BASE_URI, uri);
+            final URL u = new URL(normalized.toASCIIString());
+            final String protocol = u.getProtocol();
+            final String hostname = u.getHost();
+            final int port = canonicalizePort(u.getPort(), protocol);
+            final String path = u.getPath();
+            final String query = u.getQuery();
+            final String file = (query != null) ? (path + "?" + query) : path;
+            final URL out = new URL(protocol, hostname, port, file);
+            return out.toString();
+        } catch (final IllegalArgumentException e) {
+            return uri;
+        } catch (final MalformedURLException e) {
+            return uri;
+        }
+    }
+
+    private int canonicalizePort(final int port, final String protocol) {
+        if (port == -1 && "http".equalsIgnoreCase(protocol)) {
+            return 80;
+        } else if (port == -1 && "https".equalsIgnoreCase(protocol)) {
+            return 443;
+        }
+        return port;
+    }
+
+    private boolean isRelativeRequest(final HttpRequest req) {
+        final String requestUri = req.getRequestLine().getUri();
+        return ("*".equals(requestUri) || requestUri.startsWith("/"));
+    }
+
+    protected String getFullHeaderValue(final Header[] headers) {
+        if (headers == null) {
+            return "";
+        }
+
+        final StringBuilder buf = new StringBuilder("");
+        boolean first = true;
+        for (final Header hdr : headers) {
+            if (!first) {
+                buf.append(", ");
+            }
+            buf.append(hdr.getValue().trim());
+            first = false;
+
+        }
+        return buf.toString();
+    }
+
+    /**
+     * For a given {@link HttpHost} and {@link HttpRequest} if the request has a
+     * VARY header - I need to get an additional URI from the pair of host and
+     * request so that I can also store the variant into my HttpCache.
+     *
+     * @param host The host for this request
+     * @param req the {@link HttpRequest}
+     * @param entry the parent entry used to track the variants
+     * @return String the extracted variant URI
+     */
+    public String getVariantURI(final HttpHost host, final HttpRequest req, final HttpCacheEntry entry) {
+        if (!entry.hasVariants()) {
+            return getURI(host, req);
+        }
+        return getVariantKey(req, entry) + getURI(host, req);
+    }
+
+    /**
+     * Compute a "variant key" from the headers of a given request that are
+     * covered by the Vary header of a given cache entry. Any request whose
+     * varying headers match those of this request should have the same
+     * variant key.
+     * @param req originating request
+     * @param entry cache entry in question that has variants
+     * @return a <code>String</code> variant key
+     */
+    public String getVariantKey(final HttpRequest req, final HttpCacheEntry entry) {
+        final List<String> variantHeaderNames = new ArrayList<String>();
+        for (final Header varyHdr : entry.getHeaders(HeaderConstants.VARY)) {
+            for (final HeaderElement elt : varyHdr.getElements()) {
+                variantHeaderNames.add(elt.getName());
+            }
+        }
+        Collections.sort(variantHeaderNames);
+
+        StringBuilder buf;
+        try {
+            buf = new StringBuilder("{");
+            boolean first = true;
+            for (final String headerName : variantHeaderNames) {
+                if (!first) {
+                    buf.append("&");
+                }
+                buf.append(URLEncoder.encode(headerName, Consts.UTF_8.name()));
+                buf.append("=");
+                buf.append(URLEncoder.encode(getFullHeaderValue(req.getHeaders(headerName)),
+                        Consts.UTF_8.name()));
+                first = false;
+            }
+            buf.append("}");
+        } catch (final UnsupportedEncodingException uee) {
+            throw new RuntimeException("couldn't encode to UTF-8", uee);
+        }
+        return buf.toString();
+    }
+
+}