Wire up /batches in skiaserve

tools/skiaserve/urlhandlers/CmdHandler.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "UrlHandler.h"
 
 #include "microhttpd.h"
 #include "../Request.h"
 #include "../Response.h"
 
 using namespace Response;
 
 bool CmdHandler::canHandle(const char* method, const char* url) {
     const char* kBasePath = "/cmd";
     return 0 == strncmp(url, kBasePath, strlen(kBasePath));
 }
 
 int CmdHandler::handle(Request* request, MHD_Connection* connection,
                        const char* url, const char* method,
                        const char* upload_data, size_t* upload_data_size) {
     SkTArray<SkString> commands;
     SkStrSplit(url, "/", &commands);
 
-    if (!request->fPicture.get() || commands.count() > 3) {
+    if (!request->hasPicture() || commands.count() > 3) {
         return MHD_NO;
     }
 
     // /cmd or /cmd/N
     if (0 == strcmp(method, MHD_HTTP_METHOD_GET)) {
         int n;
         if (commands.count() == 1) {
-            n = request->fDebugCanvas->getSize() - 1;
+            n = request->getLastOp();
         } else {
             sscanf(commands[1].c_str(), "%d", &n);
         }
-        return SendJSON(connection, request, n);
+        
+        SkAutoTUnref<SkData> data(request->getJsonOps(n));
+        return SendData(connection, data, "application/json");
     }
 
     // /cmd/N, for now only delete supported
     if (commands.count() == 2 && 0 == strcmp(method, MHD_HTTP_METHOD_DELETE)) {
         int n;
         sscanf(commands[1].c_str(), "%d", &n);
         request->fDebugCanvas->deleteDrawCommandAt(n);
         return SendOK(connection);
     }
 
     // /cmd/N/[0|1]
     if (commands.count() == 3 && 0 == strcmp(method, MHD_HTTP_METHOD_POST))  {
         int n, toggle;
         sscanf(commands[1].c_str(), "%d", &n);
         sscanf(commands[2].c_str(), "%d", &toggle);
         request->fDebugCanvas->toggleCommand(n, toggle);
         return SendOK(connection);
     }
 
     return MHD_NO;
 }