diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/SnapshotPushPostbackHandler.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/SnapshotPushPostbackHandler.java
index fff9757011..55188da04b 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/SnapshotPushPostbackHandler.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/SnapshotPushPostbackHandler.java
@@ -1,11 +1,15 @@
 package uk.ac.ic.wlgitbridge.application;
 
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
 import org.eclipse.jetty.server.Request;
 import org.eclipse.jetty.server.handler.AbstractHandler;
+import uk.ac.ic.wlgitbridge.bridge.WriteLatexDataSource;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.BufferedReader;
 import java.io.IOException;
 
 /**
@@ -13,27 +17,29 @@ import java.io.IOException;
  */
 public class SnapshotPushPostbackHandler extends AbstractHandler {
 
+    private final WriteLatexDataSource writeLatexDataSource;
+
+    public SnapshotPushPostbackHandler(WriteLatexDataSource writeLatexDataSource) {
+        this.writeLatexDataSource = writeLatexDataSource;
+    }
+
     @Override
     public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
 //                System.out.println("handling");
 //                System.out.println(request.getMethod());
 //                response.setContentType("text/html;charset=utf-8");
 //                response.setStatus(HttpServletResponse.SC_OK);
-        baseRequest.setHandled(false);
         if (request.getMethod().equals("POST") && request.getPathInfo().endsWith("postback")) {
-            System.out.println(request.getHeaderNames());
+            BufferedReader reader = request.getReader();
+            StringBuilder sb = new StringBuilder();
+            for (String line; (line = reader.readLine()) != null; ) {
+                sb.append(line);
+            }
+            String data = sb.toString();
+            JsonObject dataObj = new Gson().fromJson(data, JsonObject.class);
+            writeLatexDataSource.postbackReceivedSuccessfully(request.getRequestURI().split("/")[0]);
+            baseRequest.setHandled(true);
         }
-
-        System.out.println(request.getRemoteAddr());
-        System.out.println(request.getLocalName());
-        System.out.println("method: " + request.getMethod());
-        System.out.println("pathInfo: " + request.getPathInfo());
-        System.out.println("contextPath: " + request.getContextPath());
-        System.out.println("pathtranslated: " + request.getPathTranslated());
-        System.out.println("queryString: " + request.getQueryString());
-        System.out.println("remoteUser: " + request.getRemoteUser());
-        System.out.println("requestURI: " + request.getRequestURI());
-//                response.getWriter().println("<h1>Hello World</h1>");
     }
 
 }
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/WLGitBridgeServer.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/WLGitBridgeServer.java
index b03edad7c0..1fd50a3b24 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/WLGitBridgeServer.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/application/WLGitBridgeServer.java
@@ -8,6 +8,7 @@ import org.eclipse.jetty.servlet.ServletContextHandler;
 import org.eclipse.jetty.servlet.ServletHolder;
 import org.eclipse.jetty.util.log.Log;
 import uk.ac.ic.wlgitbridge.application.jetty.NullLogger;
+import uk.ac.ic.wlgitbridge.bridge.WriteLatexDataSource;
 import uk.ac.ic.wlgitbridge.git.exception.InvalidRootDirectoryPathException;
 import uk.ac.ic.wlgitbridge.git.servlet.WLGitServlet;
 import uk.ac.ic.wlgitbridge.writelatex.WriteLatexAPI;
@@ -67,20 +68,21 @@ public class WLGitBridgeServer {
 
     private void configureJettyServer() throws ServletException, InvalidRootDirectoryPathException {
         HandlerCollection handlers = new HandlerCollection();
+        WriteLatexAPI writeLatexDataSource = new WriteLatexAPI(new WLDataModel(rootGitDirectoryPath));
         handlers.setHandlers(new Handler[] {
                 initResourceHandler(),
-                new SnapshotPushPostbackHandler(),
-                initGitHandler()
+                new SnapshotPushPostbackHandler(writeLatexDataSource),
+                initGitHandler(writeLatexDataSource)
         });
         jettyServer.setHandler(handlers);
     }
 
-    private Handler initGitHandler() throws ServletException, InvalidRootDirectoryPathException {
+    private Handler initGitHandler(WriteLatexDataSource writeLatexDataSource) throws ServletException, InvalidRootDirectoryPathException {
         final ServletContextHandler servletContextHandler = new ServletContextHandler(ServletContextHandler.SESSIONS);
         servletContextHandler.setContextPath("/");
         servletContextHandler.addServlet(
                 new ServletHolder(
-                        new WLGitServlet(servletContextHandler, new WriteLatexAPI(new WLDataModel(rootGitDirectoryPath)), rootGitDirectoryPath)),
+                        new WLGitServlet(servletContextHandler, writeLatexDataSource, rootGitDirectoryPath)),
                 "/*"
         );
         return servletContextHandler;
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/bridge/WriteLatexDataSource.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/bridge/WriteLatexDataSource.java
index 4804a8a7e3..9780950529 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/bridge/WriteLatexDataSource.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/bridge/WriteLatexDataSource.java
@@ -19,6 +19,7 @@ public interface WriteLatexDataSource {
     public void expectPostback(String projectName);
 
     /* Called by postback thread. */
-    public void postbackReceived(String projectName);
+    public void postbackReceivedSuccessfully(String projectName);
+    public void postbackReceivedWithException(String projectName, SnapshotPostException exception);
 
 }
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/SnapshotFetcher.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/SnapshotFetcher.java
index 95dad68591..df9ca55f93 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/SnapshotFetcher.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/SnapshotFetcher.java
@@ -38,6 +38,10 @@ public class SnapshotFetcher {
         return snapshots.get(versions.last());
     }
 
+    public void putLatestVersion(int versionID) {
+        versions.add(versionID);
+    }
+
     private boolean getNew(SortedSet<Snapshot> newSnapshots) throws FailedConnectionException, InvalidProjectException {
         SnapshotGetDocRequest getDoc = new SnapshotGetDocRequest(projectName);
         SnapshotGetSavedVersRequest getSavedVers = new SnapshotGetSavedVersRequest(projectName);
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WLDirectoryNodeSnapshot.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WLDirectoryNodeSnapshot.java
index 89d02d65c1..027740a03c 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WLDirectoryNodeSnapshot.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WLDirectoryNodeSnapshot.java
@@ -21,7 +21,7 @@ public class WLDirectoryNodeSnapshot implements CandidateSnapshot {
     private final CandidateSnapshotCallback callback;
 
     public WLDirectoryNodeSnapshot(WLProject project, WLDirectoryNode directoryNode, String hostname, CandidateSnapshotCallback callback) {
-        previousVersionID = project.getLatestSnapshot().getVersionID();
+        previousVersionID = project.getLatestSnapshotID();
         projectName = project.getName();
         projectURL = "http://" + hostname + "/" + projectName;
         this.directoryNode = directoryNode;
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WriteLatexAPI.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WriteLatexAPI.java
index 2b06165839..8b6f652a73 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WriteLatexAPI.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/WriteLatexAPI.java
@@ -11,8 +11,9 @@ import uk.ac.ic.wlgitbridge.writelatex.api.request.push.SnapshotPushRequest;
 import uk.ac.ic.wlgitbridge.writelatex.model.WLDataModel;
 
 import java.io.IOException;
-import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * Created by Winston on 16/11/14.
@@ -20,9 +21,11 @@ import java.util.List;
 public class WriteLatexAPI implements WriteLatexDataSource {
 
     private final WLDataModel dataModel;
+    private final Map<String, Object> postbackConds;
 
     public WriteLatexAPI(WLDataModel dataModel) {
         this.dataModel = dataModel;
+        postbackConds = new HashMap<String, Object>();
     }
 
     @Override
@@ -46,29 +49,31 @@ public class WriteLatexAPI implements WriteLatexDataSource {
     public void putDirectoryContentsToProjectWithName(String projectName, RawDirectoryContents directoryContents, String hostname) throws SnapshotPostException, IOException, FailedConnectionException {
         CandidateSnapshot candidate = dataModel.createCandidateSnapshotFromProjectWithContents(projectName, directoryContents, hostname);
         new SnapshotPushRequest(candidate).request();
-        throw new SnapshotPostException() {
-
-            @Override
-            public String getMessage() {
-                return "unimplemented";
-            }
-
-            @Override
-            public List<String> getDescriptionLines() {
-                return Arrays.asList("Currently implemented");
-            }
-        };
+        expectPostback(projectName);
+        candidate.approveWithVersionID(100);
     }
 
     @Override
     public void expectPostback(String projectName) {
-
+        Object value = new Object();
+        postbackConds.put(projectName, value);
+        try {
+            value.wait();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
     }
 
     /* Called by postback thread. */
     @Override
-    public void postbackReceived(String projectName) {
+    public void postbackReceivedSuccessfully(String projectName) {
+        System.out.println("successfully received postback for " + projectName);
+        postbackConds.get(projectName).notifyAll();
+    }
 
+    @Override
+    public void postbackReceivedWithException(String projectName, SnapshotPostException exception) {
+        postbackReceivedSuccessfully(projectName);
     }
 
 }
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/filestore/store/WLFileStore.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/filestore/store/WLFileStore.java
index 0a3dac02af..1ea36ab204 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/filestore/store/WLFileStore.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/filestore/store/WLFileStore.java
@@ -1,5 +1,6 @@
 package uk.ac.ic.wlgitbridge.writelatex.filestore.store;
 
+import uk.ac.ic.wlgitbridge.bridge.CandidateSnapshot;
 import uk.ac.ic.wlgitbridge.bridge.RawDirectoryContents;
 import uk.ac.ic.wlgitbridge.bridge.WritableRepositoryContents;
 import uk.ac.ic.wlgitbridge.writelatex.api.request.exception.FailedConnectionException;
@@ -59,6 +60,10 @@ public class WLFileStore {
         return getDirectoryNodeForProjectName(project.getName()).createFromRawDirectoryContents(directoryContents, attDirectory);
     }
 
+    public void approveCandidateSnapshot(int versionID, CandidateSnapshot candidateSnapshot) {
+        fileStore.put(candidateSnapshot.getProjectName(), candidateSnapshot.getDirectoryNode());
+    }
+
     private WLDirectoryNode getDirectoryNodeForProjectName(String projectName) {
         WLDirectoryNode directoryNode = fileStore.get(projectName);
         if (directoryNode == null) {
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLDataModel.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLDataModel.java
index 836b697cf6..ca6c53b641 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLDataModel.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLDataModel.java
@@ -53,7 +53,8 @@ public class WLDataModel implements CandidateSnapshotCallback {
 
     @Override
     public void approveSnapshot(int versionID, CandidateSnapshot candidateSnapshot) {
-
+        getProjectWithName(candidateSnapshot.getProjectName()).putLatestSnapshot(versionID);
+        fileStore.approveCandidateSnapshot(versionID, candidateSnapshot);
     }
 
 }
diff --git a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLProject.java b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLProject.java
index a508ed26fb..2600253682 100644
--- a/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLProject.java
+++ b/services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/model/WLProject.java
@@ -17,7 +17,7 @@ public class WLProject {
     private final Map<Integer, Snapshot> snapshots;
     private final SnapshotFetcher snapshotFetcher;
 
-    private Snapshot latestSnapshot;
+    private int latestSnapshotID;
 
     public WLProject(String name) {
         this.name = name;
@@ -27,7 +27,7 @@ public class WLProject {
 
     public SortedSet<Snapshot> fetchNewSnapshots() throws FailedConnectionException, InvalidProjectException {
         SortedSet<Snapshot> newSnapshots = snapshotFetcher.fetchNewSnapshots();
-        latestSnapshot = snapshotFetcher.getLatestSnapshot();
+        latestSnapshotID = snapshotFetcher.getLatestSnapshot().getVersionID();
         return newSnapshots;
     }
 
@@ -35,8 +35,14 @@ public class WLProject {
         return name;
     }
 
-    public Snapshot getLatestSnapshot() {
-        return latestSnapshot;
+    public int getLatestSnapshotID() {
+        return latestSnapshotID;
+    }
+
+    public void putLatestSnapshot(int versionID) {
+        snapshots.put(versionID, null);
+        snapshotFetcher.putLatestVersion(versionID);
+        latestSnapshotID = versionID;
     }
 
 }