Refactoring the SysInfoProvider.

chrome/browser/chromeos/system_logs/lsb_release_log_source.cc

+// Copyright (c) 2012 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/chromeos/system_logs/lsb_release_log_source.h"
+
+#include <string>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/string_util.h"
+#include "base/string_split.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace {
+
+const char kInvalidLogEntry[] = "<invalid characters in log entry>";
+const char kEmptyLogEntry[] = "<no value>";
+
+typedef std::pair<std::string, std::string> KeyValuePair;
+
+}  // namespace
+
+namespace chromeos {
+
+void LsbReleaseLogSource::Fetch(const SysLogsSourceCallback& callback) {
+  DCHECK(!callback.is_null());
+
+  SystemLogsResponse* response = new SystemLogsResponse;
+  BrowserThread::PostBlockingPoolTaskAndReply(
+      FROM_HERE,
+      base::Bind(&LsbReleaseLogSource::ReadLSBRelease, response),
+      base::Bind(callback,
+                 base::Owned(response)));
+}
+
+void LsbReleaseLogSource::ReadLSBRelease(SystemLogsResponse* response) {
+  DCHECK(response);
+
+  const FilePath lsb_release_file("/etc/lsb-release");
+  std::string lsb_data;
+  bool read_success = file_util::ReadFileToString(lsb_release_file, &lsb_data);
+  // if we were using an internal temp file, the user does not need the
+  // logs to stay past the ReadFile call - delete the file
+  if (!read_success) {
+    LOG(ERROR) << "Can't access /etc/lsb-release file.";
+    return;
+  }
+  ParseLSBRelease(lsb_data, response);
+}
+
+void LsbReleaseLogSource::ParseLSBRelease(const std::string& lsb_data,
+                                          SystemLogsResponse* response) {
+  std::vector<KeyValuePair> pairs;
+  base::SplitStringIntoKeyValuePairs(lsb_data, '=', '\n', &pairs);
+  for (size_t i = 0; i  < pairs.size(); ++i) {
+    std::string key, value;
+    TrimWhitespaceASCII(pairs[i].first, TRIM_ALL, &key);
+    TrimWhitespaceASCII(pairs[i].second, TRIM_ALL, &value);
+
+    if (key.empty())
+      continue;
+    if (!IsStringUTF8(value) || !IsStringUTF8(key)) {
+      LOG(WARNING) << "Invalid characters in system log entry: " << key;
+      (*response)[key] = kInvalidLogEntry;
+      continue;
+    }
+
+    if (value.empty())
+      (*response)[key] = kEmptyLogEntry;
+    else
+      (*response)[key] = value;
+  }
+}
+
+}  // namespace chromeos
+