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// Copyright 2022 The Chromium Authors.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <fstream>
#include <iostream>
#include <string>
#include <regex>
#include <vector>
#include "content_analysis/sdk/analysis_agent.h"
#include "demo/handler.h"
#include "demo/handler_misbehaving.h"
using namespace content_analysis::sdk;
// Different paths are used depending on whether this agent should run as a
// use specific agent or not. These values are chosen to match the test
// values in chrome browser.
constexpr char kPathUser[] = "path_user";
constexpr char kPathSystem[] = "brcm_chrm_cas";
// Global app config.
std::string path = kPathSystem;
bool use_queue = false;
bool user_specific = false;
std::vector<unsigned long> delays = {0}; // In seconds.
unsigned long num_threads = 8u;
std::string save_print_data_path = "";
RegexArray toBlock, toWarn, toReport;
static bool useMisbehavingHandler = false;
static std::string modeStr;
// Command line parameters.
constexpr const char* kArgDelaySpecific = "--delays=";
constexpr const char* kArgPath = "--path=";
constexpr const char* kArgQueued = "--queued";
constexpr const char* kArgThreads = "--threads=";
constexpr const char* kArgUserSpecific = "--user";
constexpr const char* kArgToBlock = "--toblock=";
constexpr const char* kArgToWarn = "--towarn=";
constexpr const char* kArgToReport = "--toreport=";
constexpr const char* kArgMisbehave = "--misbehave=";
constexpr const char* kArgHelp = "--help";
constexpr const char* kArgSavePrintRequestDataTo = "--save-print-request-data-to=";
std::map<std::string, Mode> sStringToMode = {
#define AGENT_MODE(name) {#name, Mode::Mode_##name},
#include "modes.h"
#undef AGENT_MODE
};
std::map<Mode, std::string> sModeToString = {
#define AGENT_MODE(name) {Mode::Mode_##name, #name},
#include "modes.h"
#undef AGENT_MODE
};
std::vector<std::pair<std::string, std::regex>>
ParseRegex(const std::string str) {
std::vector<std::pair<std::string, std::regex>> ret;
for (auto it = str.begin(); it != str.end(); /* nop */) {
auto it2 = std::find(it, str.end(), ',');
ret.push_back(std::make_pair(std::string(it, it2), std::regex(it, it2)));
it = it2 == str.end() ? it2 : it2 + 1;
}
return ret;
}
bool ParseCommandLine(int argc, char* argv[]) {
for (int i = 1; i < argc; ++i) {
const std::string arg = argv[i];
if (arg.find(kArgUserSpecific) == 0) {
// If kArgPath was already used, abort.
if (path != kPathSystem) {
std::cout << std::endl << "ERROR: use --path=<path> after --user";
return false;
}
path = kPathUser;
user_specific = true;
} else if (arg.find(kArgDelaySpecific) == 0) {
std::string delaysStr = arg.substr(strlen(kArgDelaySpecific));
delays.clear();
size_t posStart = 0, posEnd;
unsigned long delay;
while ((posEnd = delaysStr.find(',', posStart)) != std::string::npos) {
delay = std::stoul(delaysStr.substr(posStart, posEnd - posStart));
if (delay > 30) {
delay = 30;
}
delays.push_back(delay);
posStart = posEnd + 1;
}
delay = std::stoul(delaysStr.substr(posStart));
if (delay > 30) {
delay = 30;
}
delays.push_back(delay);
} else if (arg.find(kArgPath) == 0) {
path = arg.substr(strlen(kArgPath));
} else if (arg.find(kArgQueued) == 0) {
use_queue = true;
} else if (arg.find(kArgThreads) == 0) {
num_threads = std::stoul(arg.substr(strlen(kArgThreads)));
} else if (arg.find(kArgToBlock) == 0) {
toBlock = ParseRegex(arg.substr(strlen(kArgToBlock)));
} else if (arg.find(kArgToWarn) == 0) {
toWarn = ParseRegex(arg.substr(strlen(kArgToWarn)));
} else if (arg.find(kArgToReport) == 0) {
toReport = ParseRegex(arg.substr(strlen(kArgToReport)));
} else if (arg.find(kArgMisbehave) == 0) {
modeStr = arg.substr(strlen(kArgMisbehave));
useMisbehavingHandler = true;
} else if (arg.find(kArgHelp) == 0) {
return false;
} else if (arg.find(kArgSavePrintRequestDataTo) == 0) {
int arg_len = strlen(kArgSavePrintRequestDataTo);
save_print_data_path = arg.substr(arg_len);
}
}
return true;
}
void PrintHelp() {
std::cout
<< std::endl << std::endl
<< "Usage: agent [OPTIONS]" << std::endl
<< "A simple agent to process content analysis requests." << std::endl
<< "Data containing the string 'block' blocks the request data from being used." << std::endl
<< std::endl << "Options:" << std::endl
<< kArgDelaySpecific << "<delay1,delay2,...> : Add delays to request processing in seconds. Delays are limited to 30 seconds and are applied round-robin to requests. Default is 0." << std::endl
<< kArgPath << " <path> : Used the specified path instead of default. Must come after --user." << std::endl
<< kArgQueued << " : Queue requests for processing in a background thread" << std::endl
<< kArgThreads << " : When queued, number of threads in the request processing thread pool" << std::endl
<< kArgUserSpecific << " : Make agent OS user specific." << std::endl
<< kArgHelp << " : prints this help message" << std::endl
<< kArgSavePrintRequestDataTo << " : saves the PDF data to the given file path for print requests" << std::endl
<< kArgToBlock << "<regex> : Regular expression matching file and text content to block." << std::endl
<< kArgToWarn << "<regex> : Regular expression matching file and text content to warn about." << std::endl
<< kArgToReport << "<regex> : Regular expression matching file and text content to report." << std::endl
<< kArgMisbehave << "<mode> : Use 'misbehaving' agent in given mode for testing purposes." << std::endl;
}
int main(int argc, char* argv[]) {
if (!ParseCommandLine(argc, argv)) {
PrintHelp();
return 1;
}
auto handler =
useMisbehavingHandler
? MisbehavingHandler::Create(modeStr, std::move(delays), save_print_data_path, std::move(toBlock), std::move(toWarn), std::move(toReport))
: use_queue
? std::make_unique<QueuingHandler>(num_threads, std::move(delays), save_print_data_path, std::move(toBlock), std::move(toWarn), std::move(toReport))
: std::make_unique<Handler>(std::move(delays), save_print_data_path, std::move(toBlock), std::move(toWarn), std::move(toReport));
if (!handler) {
std::cout << "[Demo] Failed to construct handler." << std::endl;
return 1;
}
// Each agent uses a unique name to identify itself with Google Chrome.
content_analysis::sdk::ResultCode rc;
auto agent = content_analysis::sdk::Agent::Create(
{path, user_specific}, std::move(handler), &rc);
if (!agent || rc != content_analysis::sdk::ResultCode::OK) {
std::cout << "[Demo] Error starting agent: "
<< content_analysis::sdk::ResultCodeToString(rc)
<< std::endl;
return 1;
};
std::cout << "[Demo] " << agent->DebugString() << std::endl;
// Blocks, sending events to the handler until agent->Stop() is called.
rc = agent->HandleEvents();
if (rc != content_analysis::sdk::ResultCode::OK) {
std::cout << "[Demo] Error from handling events: "
<< content_analysis::sdk::ResultCodeToString(rc)
<< std::endl;
std::cout << "[Demo] " << agent->DebugString() << std::endl;
}
return 0;
}