C++ http_request类代码示例

//
// A GET of the dealer resource produces a list of existing tables.
// 
void BlackJackDealer::handle_get(http_request message)
{
    ucout <<  message.to_string() << endl;

    auto paths = http::uri::split_path(http::uri::decode(message.relative_uri().path()));
    if (paths.empty())
    {
        message.reply(status_codes::OK, TablesAsJSON(U("Available Tables"), s_tables));
        return;
    }

    utility::string_t wtable_id = paths[0];
    const utility::string_t table_id = wtable_id;

    // Get information on a specific table.
    auto found = s_tables.find(table_id);
    if (found == s_tables.end())
    {
        message.reply(status_codes::NotFound);
    }
    else
    {
        message.reply(status_codes::OK, found->second->AsJSON());
    }
};

http_response www_server::on_request(const http_request &req) {
	http_response resp;
	// we are support only HTTP GET method
	if (req.get_method() != http_method::get) {
		resp.set_status(http_error::method_not_allowed);
		resp.set_allow(http_method::get);
        resp.set_content("The POST requests are not supported yet.");
		return resp;
	}
	// obtain the name of the file requested
	url u(req.get_path_info());
	u.normalize(root_dir);
	// load file content to the server response
	try {
		ifstream in(u.path.c_str());
		// if file can't be open, throw an error
		if (!in)
			throw dbp::exception(string("File not found: ") + u.path);
		// set file content type
		resp.set_content_type(mime(u.path));
		// load file
		resp.add_content(in);
	}
	catch (dbp::exception &e) {
		// return error message
		resp.set_status(http_error::not_found);
		resp.set_content(e.what());
	}
	return resp;
}

// Handler to process HTTP::GET requests.
// Replies to the request with data.
void CasaLens::handle_get(http_request message)
{    
    auto path = message.relative_uri().path();
    auto content_data = m_htmlcontentmap.find(path);
    if (content_data == m_htmlcontentmap.end())
    {
        message.reply(status_codes::NotFound, U("Path not found")).then(std::bind(&handle_error, std::placeholders::_1));
        return;
    }

    auto file_name = std::get<0>(content_data->second);
    auto content_type = std::get<1>(content_data->second);
    concurrency::streams::fstream::open_istream(file_name, std::ios::in).then([=](concurrency::streams::istream is)
    {
        message.reply(status_codes::OK, is, content_type).then(std::bind(&handle_error, std::placeholders::_1));
    }).then([=](pplx::task<void>& t)
    {
        try
        {
            t.get();
        }
        catch(...)
        {
            // opening the file (open_istream) failed.
            // Reply with an error.
            message.reply(status_codes::InternalError).then(std::bind(&handle_error, std::placeholders::_1));
        }
    });
}

void FoldersService::render_DELETE(const http_request& req, http_response** res)
{
	if (req.get_user()=="a" && req.get_pass()=="a")
	{
		string strid = req.get_arg("id");

		CUUID id = CUUID::Parse(strid);
		HisDevFolder* folder = dynamic_cast<HisDevFolder*>(root->GetFolder()->Find(id));

		if (folder!=NULL)
		{
			HisDevFolder* parentfolder = dynamic_cast<HisDevFolder*>(folder->GetParent());
			parentfolder->Remove(id);
			delete(folder);
			root->Save();

			*res = new http_string_response("", 200, "application/json");
			return;
		}
	}
	else
	{
		string message = "Autentication error";
		*res = new http_string_response(message.c_str(), 401, "application/json");
		return;
	}

	*res = new http_string_response("", 403, "application/json");

}

void details::http_listener_impl::handle_request(http_request msg)
{
    // Specific method handler takes priority over general.
    const method &mtd = msg.method();
    if(m_supported_methods.count(mtd))
    {
        m_supported_methods[mtd](msg);
    }
    else if(mtd == methods::OPTIONS)
    {
        handle_options(msg);
    }
    else if(mtd == methods::TRCE)
    {
        handle_trace(msg);
    }
    else if(m_all_requests != nullptr)
    {
        m_all_requests(msg);
    }
    else
    {
        // Method is not supported.
        // Send back a list of supported methods to the client.
        http_response response(status_codes::MethodNotAllowed);
        response.headers().add(U("Allow"), get_supported_methods());
        msg.reply(response);
    }
}

void ModbusService::render_GET(const http_request& req, http_response** res)
{
	//api/modbus/holdings/{connectorname}/{devaddress}/{baseaddress}/{count}
	string connectorName = req.get_arg("connectorname");
	string strDevAddress = req.get_arg("devaddress");
	string strBaseAddress = req.get_arg("baseaddress");
	string strCount = req.get_arg("value");

	int devAddress = Converter::stoi(strDevAddress);
	int baseAddress = Converter::stoi(strBaseAddress);
	int count = Converter::stoi(strCount);

	Document document;
	StringBuffer buffer;
	PrettyWriter<StringBuffer> wr(buffer);
	Value jsonvalue;

	IModbus* modbus = mm->Find(connectorName);
	if (modbus!=NULL)
	{
		uint16_t* target = new uint16_t[count];
		if (modbus->getHoldings(devAddress,baseAddress,count,target))
		{
			document.SetArray();
			for(int i=0;i<count;i++)
			{
				Value jsonvalue;
				jsonvalue.SetUint(target[i]);
				document.PushBack(jsonvalue, document.GetAllocator());
			}
		}
		else
		{
			document.SetObject();

			jsonvalue.SetObject();
			jsonvalue.SetString("Error",document.GetAllocator());
			document.AddMember("Result",jsonvalue,document.GetAllocator());
			jsonvalue.SetString("Modbus getHoldings failed",document.GetAllocator());
			document.AddMember("Message",jsonvalue,document.GetAllocator());
		}

		delete[] target;
		target = NULL;
	}
	else
	{
		document.SetObject();
		jsonvalue.SetString("Error",document.GetAllocator());
		document.AddMember("Result",jsonvalue,document.GetAllocator());
		jsonvalue.SetString("Connector not found",document.GetAllocator());
		document.AddMember("Message",jsonvalue,document.GetAllocator());
	}

	document.Accept(wr);
	std::string json = buffer.GetString();
	*res = new http_response(http_response_builder(json, 200,"application/json").string_response());
}

void
RestEngineUri::handle_delete(http_request request)
{
    std::cout << request.method() << " : " << request.absolute_uri().path() << std::endl;
    http_response response(status_codes::OK);
    std::string resultstr("Not Supported");
    std::pair<bool, std::string> result {true, std::string()};
    make_response(response, resultstr, result);
    request.reply(response);
}

pplx::task<http_response> client::http_client::request(http_request request, pplx::cancellation_token token)
{
    if(!request.headers().has(header_names::user_agent))
    {
        request.headers().add(header_names::user_agent, USERAGENT);
    }

    request._set_base_uri(base_uri());
    request._set_cancellation_token(token);
    return m_pipeline->propagate(request);
}

void RDService::handle_get(http_request message)
{
	std::cout << "GET request got" << std::endl;
	web::uri reqUri = message.relative_uri();

	wcout << "Query:" << reqUri.query() << endl << reqUri.resource().to_string() << endl;

	utility::string_t queryStr = reqUri.query();
	
	auto path = reqUri.path();
	vector<utility::string_t> queryList = splitStringByAnd(queryStr);

	wstring conditions = U("");

	if (queryList.size() > 0)
	{
		conditions += queryList[0];
	}

	for (size_t i = 1; i < queryList.size(); i++)
	{
		conditions += U(" AND ") + queryList[i];
	}

	string finalCondition(conditions.begin(), conditions.end());

	vector<Vehicle> dbResult = DbHelper::getInstance()->getVehicleList((char *)finalCondition.c_str());

	string table = "";


	auto path2 = message.relative_uri().path();
	string reply;

	for (int i = 0; i < dbResult.size(); i++)
	{
		Vehicle v = dbResult[i];
		string tr = "";
		tr += v.Registration + "#";
		tr +=  to_string(v.Make) + "#";
		tr += "" + v.Model + "#";
		tr += "" + v.Owner + "#";
	
		table += tr;
	}

	utility::string_t replyText(table.begin(), table.end());
	message.reply(status_codes::OK, replyText).then([](pplx::task<void> t) { handle_error(t); });

}

    int operator() (const http_request& request, http_response* response)
    {
        char buf[256] = {0};
        std::string resp_body;
        std::vector<pid_t>::iterator it;
        std::string path_str;
        time_t time_now;

        ///只允许get方法
        http_request::request_method method = request.get_method();
        if (method != http_request::rGet)
            goto err;

        ///只允许请求/
        path_str =request.get_path();
        if (path_str != "/")
            return -1;

        if (request.get_request_head("Connection") == std::string("close")) {
            response->add_header("Connection", "close");
            response->set_close_conn(true);
        }

        snprintf(buf, sizeof(buf), "uid: %d \r\n", process_info::uid());
        resp_body = buf + process_info::username() + "\r\n" +
                    process_info::hostname() + "\r\n" + "\r\n";

        for (it = m_pid_vec_.begin(); it != m_pid_vec_.end(); ++it) {
            resp_body += process_info::get_proc_status(*it) + "\r\n";

            snprintf(buf, sizeof(buf), "opend Files: %d \r\n\r\n", process_info::get_opened_files(*it));
            resp_body += buf;
        }

        response->set_status_code(http_response::k200Ok);
        response->set_status_str("OK");
        response->add_header("Content-Type", "text/plain");
        response->add_header("Server", "async_serv");
        response->add_header("Connection", "keep-alive");

        ::time(&time_now);
        ::strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S GMT", ::gmtime(&time_now));
        response->add_header("Date", buf);

        response->set_body(resp_body);

        return 0;
err:
        return default_404_response(request, response);
    }

void
RestRollupsUri::handle_post(http_request request)
{
    std::cout << request.method() << " : " << request.absolute_uri().path() << std::endl;
    int rc = 0;
    std::string resultstr;
    std::pair<bool, std::string> result {true, std::string()};

    char json[1024];

    // extract json from request
    snprintf(json, sizeof(json), "%s", request.extract_string(true).get().c_str());
    std::cout << "JSON:\n" << json << std::endl;

    rapidjson::Document document; 
    if (document.Parse(json).HasParseError())
    {
        rc = 1;
        resultstr += "document invalid";
    }

    rapidjson::SchemaValidator validator(*_schema);
    if (!document.Accept(validator)) {
        rc = 1;
        resultstr += get_schema_validation_error(&validator);
    }

    rapidjson::Value::MemberIterator name = document.FindMember("name");
    rapidjson::Value::MemberIterator nocsv = document.FindMember("nocsv");
    rapidjson::Value::MemberIterator quantity = document.FindMember("quantity");
    rapidjson::Value::MemberIterator maxdroop = document.FindMember("maxDroop");
    rapidjson::Value::MemberIterator maxsdroop_validation = document.FindMember("maxDroopMaxtoMinIOPSSection");

    // Execute Ivy Engine command
    if (rc == 0)
    {
        std::unique_lock<std::mutex> u_lk(goStatementMutex);
        std::pair<int, std::string> 
        rslt = m_s.create_rollup(name->value.GetString(),
                   (nocsv != document.MemberEnd() ? nocsv->value.GetBool() : false),
                   false /* have_quantity_validation */,
                   (maxsdroop_validation != document.MemberEnd() ? maxsdroop_validation->value.GetBool() : false),
                   (quantity != document.MemberEnd() ? quantity->value.GetInt() : 1),
                   (maxdroop != document.MemberEnd() ? maxdroop->value.GetDouble() : 6.95323e-310));
    }

    http_response response(status_codes::OK);
    make_response(response, resultstr, result);
    request.reply(response);
}

void
RestRollupsUri::handle_get(http_request request)
{
    std::cout << request.method() << " : " << request.absolute_uri().path() << std::endl;
    http_response response(status_codes::OK);
    std::string resultstr("Not Supported");
    std::pair<bool, std::string> result {true, std::string()};

    resultstr = m_s.show_rollup_structure();

    make_response(response, resultstr, result);
    request.reply(response);
    return;
}

// Respond to HTTP::POST messages
// Post data will contain the postal code or location string.
// Aggregate location data from different services and reply to the POST request.
void CasaLens::handle_post(http_request message)
{
    auto path = message.relative_uri().path();
    if (0 == path.compare(U("/")))
    {
        message.extract_string()
            .then([=](const utility::string_t& location) { get_data(message, location); })
            .then([](pplx::task<void> t) { handle_error(t); });
    }
    else
    {
        message.reply(status_codes::NotFound, U("Path not found")).then([](pplx::task<void> t) { handle_error(t); });
    }
}

// Respond to HTTP::POST messages
// Post data will contain the postal code or location string.
// Aggregate location data from different services and reply to the POST request.
void CasaLens::handle_post(http_request message)
{ 
    auto path = message.relative_uri().path();
    if (0 == path.compare(U("/")))
    {
        message.extract_string().then([=](const utility::string_t& location)
        {
            get_data(message, location); 
        }).then(std::bind(&handle_error, std::placeholders::_1));
    }
    else
    {
        message.reply(status_codes::NotFound, U("Path not found")).then(std::bind(&handle_error, std::placeholders::_1));
    }
}

void ModbusService::render_PUT(const http_request& req, http_response** res)
{
	string connectorName = req.get_arg("connectorname");
	string strDevAddress = req.get_arg("devaddress");
	string strBaseAddress = req.get_arg("baseaddress");
	string strValue = req.get_arg("value");

	int devAddress = Converter::stoi(strDevAddress);
	int baseAddress = Converter::stoi(strBaseAddress);
	int value = Converter::stoi(strValue);

	Document document;
	StringBuffer buffer;
	PrettyWriter<StringBuffer> wr(buffer);
	document.SetObject();
	Value jsonvalue;

	IModbus* modbus = mm->Find(connectorName);
	if (modbus!=NULL)
	{

		if (modbus->setHolding(devAddress,baseAddress,value))
		{
			jsonvalue.SetString("OK",document.GetAllocator());
			document.AddMember("Result",jsonvalue,document.GetAllocator());
		}
		else
		{
			jsonvalue.SetString("Error",document.GetAllocator());
			document.AddMember("Result",jsonvalue,document.GetAllocator());
			jsonvalue.SetString("Modbus setHolding failed",document.GetAllocator());
			document.AddMember("Message",jsonvalue,document.GetAllocator());
		}
	}
	else
	{
		jsonvalue.SetString("Error",document.GetAllocator());
		document.AddMember("Result",jsonvalue,document.GetAllocator());
		jsonvalue.SetString("Connector not found",document.GetAllocator());
		document.AddMember("Message",jsonvalue,document.GetAllocator());
	}
	document.Accept(wr);
	std::string json = buffer.GetString();
	*res = new http_response(http_response_builder(json, 200,"application/json").string_response());
}