chrome.experimental.downloads

chrome/browser/extensions/extension_downloads.cc

+// Copyright (c) 2011 The Chromium 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 "chrome/browser/extensions/extension_downloads.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/download/download_create_info.h"
+#include "chrome/browser/download/download_file_manager.h"
+#include "chrome/browser/download/download_item.h"
+#include "chrome/browser/download/download_manager.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/resource_dispatcher_host.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/download/download_util.h"
+#include "chrome/browser/icon_loader.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/icon_manager.h"
+
+namespace {
+DictionaryValue* DownloadItemToJSON(DownloadItem* item) {
+  return NULL;
+}
+
+void SearchDownloads(DictionaryValue* query,
+                     std::vector<DownloadItem*>* items) {
+  CHECK(query);
+  CHECK(items);
+}
+}  // anonymous namespace
+
+bool DownloadsDownloadFunction::RunImpl() {
+  products_ = new DictionaryValue();
+  result_.reset(products_);
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetDictionary(0, &options_) ||
+      (options_ == NULL) ||
+      !options_->GetString("url", &url_) ||
+      url_.empty()) return false;
+  options_->GetString("filename", &filename_);
+  options_->GetBoolean("save_as", &save_as_);
+  options_->GetString("method", &method_);
+  options_->GetDictionary("headers", &extra_headers_);
+  options_->GetString("body", &post_body_);
+  // TODO sanity check method_, extra_headers_, filename_
+  dl_man_ = profile()->GetDownloadManager();
+  rdh_ = g_browser_process->resource_dispatcher_host();
+  tab_contents_ = BrowserList::GetLastActive()->GetSelectedTabContentsWrapper()
+    ->tab_contents();
+  resource_context_ = &profile()->GetResourceContext();
+  render_process_host_id_ = tab_contents_->GetRenderProcessHost()->id();
+  render_view_host_routing_id_ = tab_contents_->render_view_host()
+    ->routing_id();
+  if (rdh_ == NULL) {
+    products_->Set("error", Value::CreateIntegerValue(-1));  // TODO
+    return false;
+  }
+  dlf_man_ = rdh_->download_file_manager();
+  if (!BrowserThread::PostTask(BrowserThread::IO, FROM_HERE, NewRunnableMethod(
+          this, &DownloadsDownloadFunction::BeginDownloadOnIOThread))) {
+    products_->Set("error", Value::CreateIntegerValue(-1));  // TODO
+    return false;
+  }
+  return true;
+}
+
+void DownloadsDownloadFunction::OnUnstartable(int error) {
+  dl_error_ = error;
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, NewRunnableMethod(
+      this, &DownloadsDownloadFunction::RespondOnUIThread));
+}
+
+void DownloadsDownloadFunction::BeginDownloadOnIOThread() {
+  DownloadSaveInfo save_info;
+  save_info.file_path = FilePath(filename_);
+  rdh_->BeginDownload(
+      GURL(url_),
+      GURL()/*referrer*/,
+      save_info,
+      save_as_,
+      method_,
+      extra_headers_,
+      post_body_,
+      base::Bind(&DownloadsDownloadFunction::OnResponseStarted, this),
+      base::Bind(&DownloadsDownloadFunction::OnUnstartable, this),
+      render_process_host_id_,
+      render_view_host_routing_id_,
+      *resource_context_);
+}
+
+void DownloadsDownloadFunction::OnResponseStarted(int dl_id) {
+  // I wonder what thread this method is called on.

[Sam Kerner (Chrome), 2011/06/21 03:37:40]

A DCHECK() that you are on the right thread would be a good idea.

[bSh, 2011/06/24 19:46:25]

Done.

+  dl_id_ = dl_id;
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, NewRunnableMethod(
+      this, &DownloadsDownloadFunction::RespondOnUIThread));
+}
+
+void DownloadsDownloadFunction::RespondOnUIThread() {
+  VLOG(1) << __FUNCTION__ << " " << url_ << " " << dl_man_ << " " << filename_
+          << " " << dl_id_ << " " << dl_error_ << " " << method_;
+  if (dl_id_ >= 0) {
+    products_->Set("id", Value::CreateIntegerValue(dl_id_));
+  } else {
+    products_->Set("error", Value::CreateIntegerValue(dl_error_));
+  }
+  SendResponse(true);
+}
+
+bool DownloadsSearchFunction::RunImpl() {
+  DictionaryValue* query = NULL;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetDictionary(0, &query)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  VLOG(1) << __FUNCTION__ << " " << dlman;
+  std::vector<DownloadItem*> items;
+  SearchDownloads(query, &items);
+  ListValue* result = new ListValue();
+  result_.reset(result);
+  for (size_t i = 0; i < items.size(); ++i) {
+    result->Set(i, DownloadItemToJSON(items[i]));
+  }
+  return true;
+}
+
+bool DownloadsPauseFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << item;
+  return true;
+}
+
+bool DownloadsResumeFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << item;
+  return true;
+}
+
+bool DownloadsCancelFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << item;
+  return true;
+}
+
+bool DownloadsEraseFunction::RunImpl() {
+  DictionaryValue* query = NULL;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetDictionary(0, &query)) return false;
+  VLOG(1) << __FUNCTION__;
+  return true;
+}
+
+bool DownloadsSetDestinationFunction::RunImpl() {
+  int dl_id = 0;
+  std::string rel_dest_path;
+  if ((args_.get() == NULL) ||

[Sam Kerner (Chrome), 2011/06/21 03:37:40]

The complex guarding if() makes me a bit nervous...  We have some methods and
macros to make validating inputs to the C++ side of extensions API code easier. 
For example, to get the first argument, which should be a dictionary, do this:

  
  EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &dict));

This macro crashes if args[0] is not a dictionary.  The marshaling code reads
extensions_api.json and checks types, so if you get here and the types of the
args are wrong something very bad is happening.  The macro
EXTENSION_FUNCTION_VALIDATE() crashes the extension's process if the type is
wrong:  Better to die on a bug then to mishandle data because we make a bad
assumption about types.

Some good examples of args processing code are here:
http://www.google.com/codesearch#OAMlx_jo-ck/src/chrome/browser/extensions/ex...

[bSh, 2011/06/24 19:46:25]

Done.

+      (args_->GetSize() < 2) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0) ||
+      !args_->GetString(1, &rel_dest_path) ||
+      rel_dest_path.empty()) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << dl_id << " " << item << " "
+          << rel_dest_path;
+  return true;
+}
+
+bool DownloadsAcceptDangerFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << item;
+  return true;
+}
+
+bool DownloadsShowFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  VLOG(1) << __FUNCTION__ << " " << item;
+  return true;
+}
+
+bool DownloadsDragFunction::RunImpl() {
+  int dl_id = 0;
+  if ((args_.get() == NULL) ||
+      (args_->GetSize() < 1) ||
+      !args_->GetInteger(0, &dl_id) ||
+      (dl_id == 0)) return false;
+  DownloadManager* dlman = profile()->GetDownloadManager();
+  DownloadItem* item = dlman->GetDownloadItem(dl_id);
+  if (item == NULL) return false;
+  IconManager* im = g_browser_process->icon_manager();
+  gfx::Image* icon = im->LookupIcon(item->GetUserVerifiedFilePath(),
+                                    IconLoader::NORMAL);
+  gfx::NativeView view = BrowserList::GetLastActive()
+    ->GetSelectedTabContentsWrapper()->tab_contents()->GetNativeView();
+  download_util::DragDownload(item, icon, view);
+  VLOG(1) << __FUNCTION__ << " " << dl_id;
+  return true;
+}