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/*
# Copyright 2013 Andrew Punch
#
# Licensed under the Apache License, Version 2.0 (the 'License')
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an 'AS IS' BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
*/
#include <fstream>
#include <boost/algorithm/string/replace.hpp>
#include <yaml-cpp/yaml.h>
#include "ua_parser.h"
namespace ua_parser {
BrowserParser::BrowserParser(const YAML::Node &yaml_attributes) {
yaml_attributes["regex"] >> pattern;
regex = boost::regex(pattern);
if (const YAML::Node *pName =yaml_attributes.FindValue("family_replacement"))
overrides.family = pName->to<std::string>();
if (const YAML::Node *pName =yaml_attributes.FindValue("v1_replacement"))
*pName >> overrides.major;
if (const YAML::Node *pName =yaml_attributes.FindValue("v2_replacement"))
*pName >> overrides.minor;
}
Browser BrowserParser::Parse(const std::string &user_agent_string) {
Browser browser;
using namespace std;
boost::smatch result;
if (boost::regex_search(user_agent_string.begin(), user_agent_string.end(), result, regex)) {
if (overrides.family.empty() && result.size()>1)
browser.family = result[1].str();
else {
browser.family = overrides.family;
boost::replace_all(browser.family, "$1", result[1].str());
}
// If the group is not found, use the override value even if it is blank
if (overrides.major.empty()&&result.size()>2)
browser.major = result[2].str();
else
browser.major = overrides.major;
if (overrides.minor.empty()&&result.size()>3)
browser.minor = result[3].str();
else
browser.minor = overrides.minor;
if (overrides.patch.empty()&&result.size()>4)
browser.patch = result[4].str();
else
browser.patch = overrides.patch;
return browser;
}
return browser;
}
OperatingSystemParser::OperatingSystemParser(const YAML::Node &yaml_attributes) {
yaml_attributes["regex"] >> pattern;
regex = boost::regex(pattern);
if (const YAML::Node *pName =yaml_attributes.FindValue("os_replacement"))
*pName >> overrides.os;
if (const YAML::Node *pName =yaml_attributes.FindValue("os_v1_replacement"))
*pName >> overrides.major;
if (const YAML::Node *pName =yaml_attributes.FindValue("os_v2_replacement"))
*pName >> overrides.minor;
}
OperatingSystem OperatingSystemParser::Parse(const std::string &user_agent_string) {
OperatingSystem os;
using namespace std;
boost::smatch result;
if (boost::regex_search(user_agent_string.begin(), user_agent_string.end(), result, regex)) {
if (overrides.os.empty() && result.size()>1)
os.os = result[1].str();
else {
os.os = overrides.os;
boost::replace_all(os.os, "$1", result[1].str());
}
// If the group is not found, use the override value even if it is blank
if (overrides.major.empty()&&result.size()>2)
os.major = result[2].str();
else
os.major = overrides.major;
if (overrides.minor.empty()&&result.size()>3)
os.minor = result[3].str();
else
os.minor = overrides.minor;
if (overrides.patch.empty()&&result.size()>4)
os.patch = result[4].str();
else
os.patch = overrides.patch;
if (overrides.patch_minor.empty()&&result.size()>5)
os.patch_minor = result[5].str();
else
os.patch_minor = overrides.patch_minor;
return os;
}
return os;
}
DeviceParser::DeviceParser(const YAML::Node &yaml_attributes) {
yaml_attributes["regex"] >> pattern;
regex = boost::regex(pattern);
if (const YAML::Node *pName=yaml_attributes.FindValue("device_replacement"))
*pName >> overrides;
}
Device DeviceParser::Parse(const std::string &user_agent_string) {
Device device;
using namespace std;
boost::smatch result;
if (boost::regex_search(user_agent_string.begin(), user_agent_string.end(), result, regex)) {
if (overrides.empty() && result.size()>1)
device = result[1].str();
else {
device = overrides;
boost::replace_all(device, "$1", result[1].str());
}
return device;
}
return device;
}
template<class ParserType>
static std::vector<ParserType> ParseYaml(const YAML::Node &yaml_regexes) {
std::vector<ParserType> parsers;
for (YAML::Iterator i=yaml_regexes.begin(); i!=yaml_regexes.end(); i++) {
ParserType parser(*i);
parsers.push_back(parser);
}
return parsers;
}
Parser::Parser(const std::string &yaml_file) {
std::ifstream in(yaml_file.c_str());
if (!in.good()) {
std::cerr << "Could not open YAML file" << yaml_file << std::endl;
return;
}
YAML::Parser parser(in);
YAML::Node doc;
parser.GetNextDocument(doc);
_browser_parsers = ParseYaml<BrowserParser>(doc["user_agent_parsers"]);
_os_parsers = ParseYaml<OperatingSystemParser>(doc["os_parsers"]);
_device_parsers = ParseYaml<DeviceParser>(doc["device_parsers"]);
}
UserAgent Parser::Parse(const std::string &user_agent_string) {
UserAgent user_agent;
user_agent.browser.family = "Other";
user_agent.os.os = "Other";
user_agent.device = "Other";
for (std::vector<BrowserParser>::iterator i=_browser_parsers.begin(); i!=_browser_parsers.end(); i++) {
Browser browser = i->Parse(user_agent_string);
if (!browser.family.empty()) {
user_agent.browser = browser;
break;
}
}
for (std::vector<OperatingSystemParser>::iterator i=_os_parsers.begin(); i!=_os_parsers.end(); i++) {
OperatingSystem os = i->Parse(user_agent_string);
if (!os.os.empty()) {
user_agent.os = os;
break;
}
}
for (std::vector<DeviceParser>::iterator i=_device_parsers.begin(); i!=_device_parsers.end(); i++) {
Device device = i->Parse(user_agent_string);
if (!device.empty()) {
user_agent.device = device;
break;
}
}
return user_agent;
}
}
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