Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_url_loader.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_url_loader.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_url_loader.cc	(revision 0)
+++ ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_url_loader.cc	(revision 0)
@@ -0,0 +1,237 @@
+// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "native_client/src/shared/ppapi_proxy/plugin_ppb_url_loader.h"
+
+#include <stdio.h>
+#include <string.h>
+#include "native_client/src/include/nacl_macros.h"
+#include "native_client/src/include/portability.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_callback.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "native_client/src/shared/srpc/nacl_srpc.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_url_loader.h"
+#include "srpcgen/ppb_rpc.h"
+
+namespace ppapi_proxy {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance) {
+  DebugPrintf("PPB_URLLoader::Create: instance=%"NACL_PRIu32"\n", instance);
+
+  PP_Resource resource;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_Create(
+          GetMainSrpcChannel(), instance, &resource);
+  DebugPrintf("PPB_URLLoader::Create: %s\n", NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return resource;
+  return kInvalidResourceId;
+}
+
+PP_Bool IsURLLoader(PP_Resource resource) {
+  DebugPrintf("PPB_URLLoader::IsURLLoader: resource=%"NACL_PRIu32"\n",
+              resource);
+
+  int32_t is_url_loader;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_IsURLLoader(
+          GetMainSrpcChannel(), resource, &is_url_loader);
+  DebugPrintf("PPB_URLLoader::IsURLLoader: %s\n",
+              NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK && is_url_loader)
+    return PP_TRUE;
+  return PP_FALSE;
+}
+
+int32_t Open(PP_Resource loader,
+             PP_Resource request,
+             struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_URLLoader::Open: loader=%"NACL_PRIu32"\n", loader);
+  DebugPrintf("PPB_URLLoader::Open: request=%"NACL_PRIu32"\n", request);
+
+  int32_t callback_id =
+      CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)  // Just like Chrome, for now disallow blocking calls.
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_Open(
+          GetMainSrpcChannel(), loader, request, callback_id, &pp_error);
+  DebugPrintf("PPB_URLLoader::Open: %s\n", NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result != NACL_SRPC_RESULT_OK)
+    pp_error = PP_ERROR_FAILED;
+  return MayForceCallback(callback, pp_error);
+}
+
+int32_t FollowRedirect(PP_Resource loader,
+                       struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_URLLoader::FollowRedirect: loader=%"NACL_PRIu32"\n", loader);
+
+  int32_t callback_id =
+      CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)  // Just like Chrome, for now disallow blocking calls.
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_FollowRedirect(
+          GetMainSrpcChannel(), loader, callback_id, &pp_error);
+  DebugPrintf("PPB_URLLoader::FollowRedirect: %s\n",
+              NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result != NACL_SRPC_RESULT_OK)
+    pp_error = PP_ERROR_FAILED;
+  return MayForceCallback(callback, pp_error);
+}
+
+PP_Bool GetUploadProgress(PP_Resource loader,
+                          int64_t* bytes_sent,
+                          int64_t* total_bytes_to_be_sent) {
+  DebugPrintf("PPB_URLLoader::GetUploadProgress: loader=%"NACL_PRIu32"\n",
+              loader);
+
+  int32_t success;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_GetUploadProgress(
+          GetMainSrpcChannel(),
+          loader,
+          bytes_sent,
+          total_bytes_to_be_sent,
+          &success);
+ DebugPrintf("PPB_URLLoader::GetUploadProgress: %s\n",
+             NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK && success)
+    return PP_TRUE;
+  return PP_FALSE;
+}
+
+PP_Bool GetDownloadProgress(PP_Resource loader,
+                            int64_t* bytes_received,
+                            int64_t* total_bytes_to_be_received) {
+  DebugPrintf("PPB_URLLoader::GetDownloadProgress: loader=%"NACL_PRIu32"\n",
+              loader);
+
+  int32_t success;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_GetDownloadProgress(
+          GetMainSrpcChannel(),
+          loader,
+          bytes_received,
+          total_bytes_to_be_received,
+          &success);
+ DebugPrintf("PPB_URLLoader::GetDownloadProgress: %s\n",
+              NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK && success)
+    return PP_TRUE;
+  return PP_FALSE;
+}
+
+PP_Resource GetResponseInfo(PP_Resource loader) {
+  DebugPrintf("PPB_URLLoader::GetResponseInfo: loader=%"NACL_PRIu32"\n",
+              loader);
+
+  PP_Resource response;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_GetResponseInfo(
+          GetMainSrpcChannel(),
+          loader,
+          &response);
+
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return response;
+  return kInvalidResourceId;
+}
+
+int32_t ReadResponseBody(PP_Resource loader,
+                         void* buffer,
+                         int32_t bytes_to_read,
+                         struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_URLLoader::ReadResponseBody: loader=%"NACL_PRIu32"\n",
+              loader);
+  if (bytes_to_read < 0)
+    bytes_to_read = 0;
+  nacl_abi_size_t buffer_size = bytes_to_read;
+
+  int32_t callback_id =
+      CompletionCallbackTable::Get()->AddCallback(callback, buffer);
+  if (callback_id == 0)  // Just like Chrome, for now disallow blocking calls.
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error_or_bytes;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_ReadResponseBody(
+          GetMainSrpcChannel(),
+          loader,
+          bytes_to_read,
+          callback_id,
+          &buffer_size,
+          static_cast<char*>(buffer),
+          &pp_error_or_bytes);
+  DebugPrintf("PPB_URLLoader::ReadResponseBody: %s\n",
+              NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result != NACL_SRPC_RESULT_OK)
+    pp_error_or_bytes = PP_ERROR_FAILED;
+  return MayForceCallback(callback, pp_error_or_bytes);
+}
+
+int32_t FinishStreamingToFile(PP_Resource loader,
+                              struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_URLLoader::FinishStreamingToFile: loader=%"NACL_PRIu32"\n",
+              loader);
+
+  int32_t callback_id =
+      CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)  // Just like Chrome, for now disallow blocking calls.
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error;
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_FinishStreamingToFile(
+          GetMainSrpcChannel(), loader, callback_id, &pp_error);
+
+  if (srpc_result != NACL_SRPC_RESULT_OK)
+    pp_error = PP_ERROR_FAILED;
+  return MayForceCallback(callback, pp_error);
+}
+
+void Close(PP_Resource loader) {
+  DebugPrintf("PPB_URLLoader::Close: loader=%"NACL_PRIu32"\n", loader);
+
+  NaClSrpcError srpc_result =
+      PpbURLLoaderRpcClient::PPB_URLLoader_Close(
+          GetMainSrpcChannel(), loader);
+  DebugPrintf("PPB_URLLoader::Close: %s\n", NaClSrpcErrorString(srpc_result));
+}
+
+}  // namespace
+
+const PPB_URLLoader* PluginURLLoader::GetInterface() {
+  static const PPB_URLLoader url_loader_interface = {
+    Create,
+    IsURLLoader,
+    Open,
+    FollowRedirect,
+    GetUploadProgress,
+    GetDownloadProgress,
+    GetResponseInfo,
+    ReadResponseBody,
+    FinishStreamingToFile,
+    Close,
+  };
+  return &url_loader_interface;
+}
+
+}  // namespace ppapi_proxy