cache middleware sample

1 files changed, 44 insertions, 0 deletions

diff --git a/AndroidAsyncSample/src/com/koushikdutta/async/sample/middleware/CacheOverrideMiddleware.java b/AndroidAsyncSample/src/com/koushikdutta/async/sample/middleware/CacheOverrideMiddleware.java
new file mode 100644
index 0000000..86d65ff
--- /dev/null
+++ b/AndroidAsyncSample/src/com/koushikdutta/async/sample/middleware/CacheOverrideMiddleware.java
@@ -0,0 +1,44 @@
+package com.koushikdutta.async.sample.middleware;
+
+import android.text.TextUtils;
+import android.util.Base64;
+
+import com.koushikdutta.async.http.AsyncHttpClient;
+import com.koushikdutta.async.http.AsyncHttpClientMiddleware;
+import com.koushikdutta.async.http.SimpleMiddleware;
+
+import java.util.Hashtable;
+
+/**
+ * Created by koush on 2/15/15.
+ */
+public class CacheOverrideMiddleware extends SimpleMiddleware {
+    // insert this using
+    public static CacheOverrideMiddleware add(AsyncHttpClient client) {
+        CacheOverrideMiddleware ret = new CacheOverrideMiddleware();
+        // add this first so it gets called before everything else
+        client.getMiddleware().add(0, ret);
+        return ret;
+    }
+
+    @Override
+    public void onHeadersReceived(OnHeadersReceivedDataOnRequestSentData data) {
+        super.onHeadersReceived(data);
+
+        // do more checking here, since uri may not necessarily be http or have a host, etc.
+        String cache = cacheHeaders.get(data.request.getUri().getHost());
+        if (!TextUtils.isEmpty(cache))
+            data.request.setHeader("Cache-Control", cache);
+    }
+
+    Hashtable<String, String> cacheHeaders = new Hashtable<String, String>();
+
+    /**
+     * Override cache-control directives
+     * @param host
+     * @param cacheControl a Cache-Control value, like "max-age=300" to cache for 5 minutes
+     */
+    public void setCacheControlForHost(String host, String cacheControl) {
+        cacheHeaders.put(host, cacheControl);
+    }
+}