Revert of Factor Chrome details out of update manifest fetching.

chrome/browser/extensions/updater/manifest_fetch_data.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/extensions/updater/manifest_fetch_data.h"
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/metrics/histogram.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "chrome/browser/google/google_brand.h"
+#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
+#include "components/omaha_query_params/omaha_query_params.h"
+#include "net/base/escape.h"
+
+namespace {
+
+// Maximum length of an extension manifest update check url, since it is a GET
+// request. We want to stay under 2K because of proxies, etc.
+const int kExtensionsManifestMaxURLSize = 2000;
+
+}  // namespace
+
+namespace extensions {
+
+ManifestFetchData::ManifestFetchData(const GURL& update_url, int request_id)
+    : base_url_(update_url),
+      full_url_(update_url) {
+  std::string query = full_url_.has_query() ?
+      full_url_.query() + "&" : std::string();
+  query += omaha_query_params::OmahaQueryParams::Get(
+      omaha_query_params::OmahaQueryParams::CRX);
+  GURL::Replacements replacements;
+  replacements.SetQueryStr(query);
+  full_url_ = full_url_.ReplaceComponents(replacements);
+
+  request_ids_.insert(request_id);
+}
+
+ManifestFetchData::~ManifestFetchData() {}
+
+// The format for request parameters in update checks is:
+//
+//   ?x=EXT1_INFO&x=EXT2_INFO
+//
+// where EXT1_INFO and EXT2_INFO are url-encoded strings of the form:
+//
+//   id=EXTENSION_ID&v=VERSION&uc
+//
+// Additionally, we may include the parameter ping=PING_DATA where PING_DATA
+// looks like r=DAYS or a=DAYS for extensions in the Chrome extensions gallery.
+// ('r' refers to 'roll call' ie installation, and 'a' refers to 'active').
+// These values will each be present at most once every 24 hours, and indicate
+// the number of days since the last time it was present in an update check.
+//
+// So for two extensions like:
+//   Extension 1- id:aaaa version:1.1
+//   Extension 2- id:bbbb version:2.0
+//
+// the full update url would be:
+//   http://somehost/path?x=id%3Daaaa%26v%3D1.1%26uc&x=id%3Dbbbb%26v%3D2.0%26uc
+//
+// (Note that '=' is %3D and '&' is %26 when urlencoded.)
+bool ManifestFetchData::AddExtension(const std::string& id,
+                                     const std::string& version,
+                                     const PingData* ping_data,
+                                     const std::string& update_url_data,
+                                     const std::string& install_source) {
+  if (extension_ids_.find(id) != extension_ids_.end()) {
+    NOTREACHED() << "Duplicate extension id " << id;
+    return false;
+  }
+
+  // Compute the string we'd append onto the full_url_, and see if it fits.
+  std::vector<std::string> parts;
+  parts.push_back("id=" + id);
+  parts.push_back("v=" + version);
+  if (!install_source.empty())
+    parts.push_back("installsource=" + install_source);
+  parts.push_back("uc");
+
+  if (!update_url_data.empty()) {
+    // Make sure the update_url_data string is escaped before using it so that
+    // there is no chance of overriding the id or v other parameter value
+    // we place into the x= value.
+    parts.push_back("ap=" + net::EscapeQueryParamValue(update_url_data, true));
+  }
+
+  // Append brand code, rollcall and active ping parameters.
+  if (base_url_.DomainIs("google.com")) {
+#if defined(GOOGLE_CHROME_BUILD)
+    std::string brand;
+    google_brand::GetBrand(&brand);
+    if (!brand.empty() && !google_brand::IsOrganic(brand))
+      parts.push_back("brand=" + brand);
+#endif
+
+    std::string ping_value;
+    pings_[id] = PingData(0, 0, false);
+
+    if (ping_data) {
+      if (ping_data->rollcall_days == kNeverPinged ||
+          ping_data->rollcall_days > 0) {
+        ping_value += "r=" + base::IntToString(ping_data->rollcall_days);
+        if (ChromeMetricsServiceAccessor::IsMetricsReportingEnabled()) {
+          ping_value += "&e=" + std::string(ping_data->is_enabled ? "1" : "0");
+        }
+        pings_[id].rollcall_days = ping_data->rollcall_days;
+        pings_[id].is_enabled = ping_data->is_enabled;
+      }
+      if (ping_data->active_days == kNeverPinged ||
+          ping_data->active_days > 0) {
+        if (!ping_value.empty())
+          ping_value += "&";
+        ping_value += "a=" + base::IntToString(ping_data->active_days);
+        pings_[id].active_days = ping_data->active_days;
+      }
+    }
+    if (!ping_value.empty())
+      parts.push_back("ping=" + net::EscapeQueryParamValue(ping_value, true));
+  }
+
+  std::string extra = full_url_.has_query() ? "&" : "?";
+  extra += "x=" + net::EscapeQueryParamValue(JoinString(parts, '&'), true);
+
+  // Check against our max url size, exempting the first extension added.
+  int new_size = full_url_.possibly_invalid_spec().size() + extra.size();
+  if (!extension_ids_.empty() && new_size > kExtensionsManifestMaxURLSize) {
+    UMA_HISTOGRAM_PERCENTAGE("Extensions.UpdateCheckHitUrlSizeLimit", 1);
+    return false;
+  }
+  UMA_HISTOGRAM_PERCENTAGE("Extensions.UpdateCheckHitUrlSizeLimit", 0);
+
+  // We have room so go ahead and add the extension.
+  extension_ids_.insert(id);
+  full_url_ = GURL(full_url_.possibly_invalid_spec() + extra);
+  return true;
+}
+
+bool ManifestFetchData::Includes(const std::string& extension_id) const {
+  return extension_ids_.find(extension_id) != extension_ids_.end();
+}
+
+bool ManifestFetchData::DidPing(const std::string& extension_id,
+                                PingType type) const {
+  std::map<std::string, PingData>::const_iterator i = pings_.find(extension_id);
+  if (i == pings_.end())
+    return false;
+  int value = 0;
+  if (type == ROLLCALL)
+    value = i->second.rollcall_days;
+  else if (type == ACTIVE)
+    value = i->second.active_days;
+  else
+    NOTREACHED();
+  return value == kNeverPinged || value > 0;
+}
+
+void ManifestFetchData::Merge(const ManifestFetchData& other) {
+  DCHECK(full_url() == other.full_url());
+  request_ids_.insert(other.request_ids_.begin(), other.request_ids_.end());
+}
+
+}  // namespace extensions