diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/net/SyncStorageCollectionRequest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/net/SyncStorageCollectionRequest.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,145 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.sync.net;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URI;
+
+import org.mozilla.gecko.background.common.log.Logger;
+
+import ch.boye.httpclientandroidlib.Header;
+import ch.boye.httpclientandroidlib.HttpEntity;
+import ch.boye.httpclientandroidlib.HttpResponse;
+import ch.boye.httpclientandroidlib.client.methods.HttpRequestBase;
+import ch.boye.httpclientandroidlib.impl.client.DefaultHttpClient;
+
+/**
+ * A request class that handles line-by-line responses. Eventually this will
+ * handle real stream processing; for now, just parse the returned body
+ * line-by-line.
+ *
+ * @author rnewman
+ *
+ */
+public class SyncStorageCollectionRequest extends SyncStorageRequest {
+  private static final String LOG_TAG = "CollectionRequest";
+
+  public SyncStorageCollectionRequest(URI uri) {
+    super(uri);
+  }
+
+  protected volatile boolean aborting = false;
+
+  /**
+   * Instruct the request that it should process no more records,
+   * and decline to notify any more delegate callbacks.
+   */
+  public void abort() {
+    aborting = true;
+    try {
+      this.resource.request.abort();
+    } catch (Exception e) {
+      // Just in case.
+      Logger.warn(LOG_TAG, "Got exception in abort: " + e);
+    }
+  }
+
+  @Override
+  protected BaseResourceDelegate makeResourceDelegate(SyncStorageRequest request) {
+    return new SyncCollectionResourceDelegate((SyncStorageCollectionRequest) request);
+  }
+
+  // TODO: this is awful.
+  public class SyncCollectionResourceDelegate extends
+      SyncStorageResourceDelegate {
+
+    private static final String CONTENT_TYPE_INCREMENTAL = "application/newlines";
+    private static final int FETCH_BUFFER_SIZE = 16 * 1024;   // 16K chars.
+
+    SyncCollectionResourceDelegate(SyncStorageCollectionRequest request) {
+      super(request);
+    }
+
+    @Override
+    public void addHeaders(HttpRequestBase request, DefaultHttpClient client) {
+      super.addHeaders(request, client);
+      request.setHeader("Accept", CONTENT_TYPE_INCREMENTAL);
+      // Caller is responsible for setting full=1.
+    }
+
+    @Override
+    public void handleHttpResponse(HttpResponse response) {
+      if (aborting) {
+        return;
+      }
+
+      if (response.getStatusLine().getStatusCode() != 200) {
+        super.handleHttpResponse(response);
+        return;
+      }
+
+      HttpEntity entity = response.getEntity();
+      Header contentType = entity.getContentType();
+      if (!contentType.getValue().startsWith(CONTENT_TYPE_INCREMENTAL)) {
+        // Not incremental!
+        super.handleHttpResponse(response);
+        return;
+      }
+
+      // TODO: at this point we can access X-Weave-Timestamp, compare
+      // that to our local timestamp, and compute an estimate of clock
+      // skew. We can provide this to the incremental delegate, which
+      // will allow it to seamlessly correct timestamps on the records
+      // it processes. Bug 721887.
+
+      // Line-by-line processing, then invoke success.
+      SyncStorageCollectionRequestDelegate delegate = (SyncStorageCollectionRequestDelegate) this.request.delegate;
+      InputStream content = null;
+      BufferedReader br = null;
+      try {
+        content = entity.getContent();
+        br = new BufferedReader(new InputStreamReader(content), FETCH_BUFFER_SIZE);
+        String line;
+
+        // This relies on connection timeouts at the HTTP layer.
+        while (!aborting &&
+               null != (line = br.readLine())) {
+          try {
+            delegate.handleRequestProgress(line);
+          } catch (Exception ex) {
+            delegate.handleRequestError(new HandleProgressException(ex));
+            BaseResource.consumeEntity(entity);
+            return;
+          }
+        }
+        if (aborting) {
+          // So we don't hit the success case below.
+          return;
+        }
+      } catch (IOException ex) {
+        if (!aborting) {
+          delegate.handleRequestError(ex);
+        }
+        BaseResource.consumeEntity(entity);
+        return;
+      } finally {
+        // Attempt to close the stream and reader.
+        if (br != null) {
+          try {
+            br.close();
+          } catch (IOException e) {
+            // We don't care if this fails.
+          }
+        }
+      }
+      // We're done processing the entity. Don't let fetching the body succeed!
+      BaseResource.consumeEntity(entity);
+      delegate.handleRequestSuccess(new SyncStorageResponse(response));
+    }
+  }
+}