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提升asio：無法讀取URL Body（JSON）

[英]Boost asio: Unable to read URL Body (JSON)

 原文  2015-10-14 18:49:57  2   1    c++/ json/ http/ boost-asio

問題描述

我測試了以下Boost :: Asio最小HTTP服務器示例:( 基於Boost的最小HTTP服務器：Asio ）

我能夠成功收集諸如Content-Length之類的Header信息，但是當我嘗試讀取Body信息時，示例會掛起。 以下是嘗試讀取Body信息的函數： 

static void read_body(std::shared_ptr<session> pThis) {
            info("read_body");

            int nbuffer = pThis->headers.content_length();
            std::shared_ptr<std::vector<char>> bufptr = std::make_shared<std::vector<char>>(nbuffer);
            asio::async_read(pThis->socket, boost::asio::buffer(*bufptr, nbuffer),
                    [pThis](const error_code& e, std::size_t s)
                    {
                        info("read body complete");
                    });
        }

我已經使用libmicrohttpd解決方案成功讀取了相同的Body信息。

有沒有更正確的方法來使用Boost：ASIO讀取Body（JSON）信息？

1 個解決方案

解決方案1
 3  2015-10-14 21:39:48

問題的實質是雙重的：

  • 首先，存在未定義的行為，因為您無法在完成處理程序中捕獲bufptr ，這意味着在系統調用寫入時已經釋放了向量...

  • 其次，你正在“剔除”身體的第一部分，因為你在閱讀標題時已經收到了它。 您應該添加代碼以保留read_next_line中已接收的read_next_line 。

真正的“誤導”可能就是在使用中 

asio::async_read_until(pThis->socket, pThis->buff, '\r', ...

好像它會以某種方式收到完整的一行。 套接字無法正常工作。 你會收到一個包。 TCP堆棧決定什么構成數據包。 Asio 承諾讀取“直到”數據包>包含<分隔符 。 它並沒有說它不會收到更多，它只是沒有安排另一個接收操作。

因此，要真正修復它，您可能只需一次讀取所有標題： 

asio::async_read_until(pThis->socket, pThis->buff, "\r\n\r\n", 
    [pThis](const error_code &e, std::size_t s) {
        if (e) { std::cerr << "Error:" << __LINE__ << " " << e.message() << "\n"; return; }
        std::cout << __FILE__ << ":" << __LINE__ << " received:" << s << "\n";
        std::istream is(&pThis->buff);

        std::string line, ignore;

        if (getline(is, line, '\r') && is.ignore(1, '\n'))
            pThis->headers.on_read_request_line(line);

        while (getline(is, line, '\r') && is.ignore(1, '\n') && !line.empty())
            pThis->headers.on_read_header(line);

注意同樣，重要的是不要假設報頭的末尾與數據包邊界重合。 因此，啟動read_body()並排除已收到的可用輸入： 

    std::shared_ptr<std::vector<char> > bufptr = std::make_shared<std::vector<char> >(nbuffer);

    auto partial = std::copy(
            std::istreambuf_iterator<char>(&pThis->buff), {}, 
            bufptr->begin());

    std::size_t already_received = std::distance(bufptr->begin(), partial);

    assert(nbuffer >= already_received);
    nbuffer -= already_received;

固定演示

住在Coliru 

#include <boost/asio.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <string>
#include <memory>
#include <iostream>
#include <fstream>

using namespace boost;
using namespace boost::system;
using namespace boost::asio;

unsigned char *get_icon(int *pOutSize);

class session;

class http_headers {
    std::string method;
    std::string url;
    std::string version;

    std::map<std::string, std::string> headers;

public:
    std::string get_response() {
        std::stringstream ssOut;
        if (url == "/favicon.ico") {
            int nSize = 0;
            unsigned char *data = get_icon(&nSize);

            ssOut << "HTTP/1.1 200 OK" << std::endl;
            ssOut << "content-type: image/vnd.microsoft.icon" << std::endl;
            ssOut << "Content-Length: " << nSize << std::endl;
            ssOut << std::endl;

            ssOut.write((char *)data, nSize);
        } else if (url == "/") {
            std::string sHTML = "<html><body><h1>Hello World</h1><p>This is a test web server in c++</p></body></html>";
            ssOut << "HTTP/1.1 200 OK" << std::endl;
            ssOut << "Content-Type: text/html" << std::endl;
            ssOut << "Content-Length: " << sHTML.length() << std::endl;
            ssOut << std::endl;
            ssOut << sHTML;
        } else {
            std::string sHTML = "<html><body><h1>404 Not Found</h1><p>There's nothing here.</p></body></html>";
            ssOut << "HTTP/1.1 404 Not Found" << std::endl;
            ssOut << "Content-Type: text/html" << std::endl;
            ssOut << "Content-Length: " << sHTML.length() << std::endl;
            ssOut << std::endl;
            ssOut << sHTML;
        }
        return ssOut.str();
    }

    size_t content_length() {
        auto request = headers.find("Content-Length");
        if (request != headers.end()) {
            std::stringstream ssLength(request->second);
            size_t content_length;
            ssLength >> content_length;
            return content_length;
        }
        return 0;
    }

    void on_read_header(std::string line) {
        std::cout << "header: '" << line << "'\n";

        std::stringstream ssHeader(line);
        std::string headerName;
        std::getline(ssHeader, headerName, ':');

        std::string value;
        std::getline(ssHeader, value);
        headers[headerName] = value;
    }

    void on_read_request_line(std::string line) {
        std::stringstream ssRequestLine(line);
        ssRequestLine >> method;
        ssRequestLine >> url;
        ssRequestLine >> version;

        std::cout << "request for resource: " << url << std::endl;
    }
};

namespace {
    static void info(std::string s) { std::cout << "INFO:" << s << "\n"; }
}

class session {
    asio::streambuf buff;
    http_headers headers;

    static void read_body(std::shared_ptr<session> pThis) {

        info("read_body");

        size_t nbuffer = pThis->headers.content_length();
        std::cout << __FILE__ << ":" << __LINE__ << " nbuffer:" << nbuffer << "\n";

        std::shared_ptr<std::vector<char> > bufptr = std::make_shared<std::vector<char> >(nbuffer);

        auto partial = std::copy(
                std::istreambuf_iterator<char>(&pThis->buff), {}, 
                bufptr->begin());

        std::size_t already_received = std::distance(bufptr->begin(), partial);

        assert(nbuffer >= already_received);
        nbuffer -= already_received;

        asio::async_read(pThis->socket, boost::asio::buffer(&*bufptr->begin() + already_received, nbuffer),
            [=](const error_code &e, std::size_t s) {
                info("read body complete"); 
                // EOF is to be expected on client disconnect
                if (e && e != boost::asio::error::eof) { 
                    std::cerr << "Error:" << __LINE__ << " " << e.message() << "\n"; return; 
                }

                std::cout << __FILE__ << ":" << __LINE__ << " received:" << s << "/" << nbuffer << "\n";

                std::string body(&*bufptr->begin(), already_received + s);

                std::string::size_type p = 0;
                for (int i = 0; i<2; ++i)
                    p = body.find_last_of("\r\n", p-1);

                std::cout << "Tail: '" << body.substr(p+1) << "'\n";

                {
                    std::ofstream ofs("debug.txt", std::ios::binary);
                    ofs << body;
                    ofs << "\n" << __FILE__ << ":" << __LINE__ << " received:" << s << "/" << nbuffer << "\n";
                }
            });
    }

    static void read_headers(std::shared_ptr<session> pThis) {
        asio::async_read_until(pThis->socket, pThis->buff, "\r\n\r\n", 
            [pThis](const error_code &e, std::size_t s) {
                if (e) { std::cerr << "Error:" << __LINE__ << " " << e.message() << "\n"; return; }
                std::cout << __FILE__ << ":" << __LINE__ << " received:" << s << "\n";
                std::istream is(&pThis->buff);

                std::string line, ignore;

                if (getline(is, line, '\r') && is.ignore(1, '\n'))
                    pThis->headers.on_read_request_line(line);

                while (getline(is, line, '\r') && is.ignore(1, '\n') && !line.empty())
                    pThis->headers.on_read_header(line);

                if (pThis->headers.content_length()) {
                    pThis->read_body(pThis);

                    auto str = std::make_shared<std::string>("HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
                    asio::async_write(
                        pThis->socket, boost::asio::buffer(*str),
                        [pThis, str](const error_code &e, std::size_t s) {
                            std::cout << "done" << std::endl; 
                        });
                } else {
                    std::shared_ptr<std::string> str = std::make_shared<std::string>(pThis->headers.get_response());
                    asio::async_write(
                        pThis->socket, boost::asio::buffer(*str),
                        [pThis, str](const error_code &e, std::size_t s) {
                            std::cout << "done" << std::endl; 
                        });
                }
            });
    }

public:
    ip::tcp::socket socket;

    session(io_service &io_service) : socket(io_service) {}

    static void interact(std::shared_ptr<session> pThis) { read_headers(pThis); }
};

void accept_and_run(ip::tcp::acceptor &acceptor, io_service &io_service) {
    std::shared_ptr<session> sesh = std::make_shared<session>(io_service);
    acceptor.async_accept(sesh->socket, [sesh, &acceptor, &io_service](const error_code &accept_error) {
        accept_and_run(acceptor, io_service);
        if (accept_error) {
            std::cerr << "Accept error: " << accept_error.message() << "\n";
        } else {
            session::interact(sesh);
        }
    });
}

int main() {
    io_service io_service;
    ip::tcp::endpoint endpoint{ ip::tcp::v4(), 8181 };
    ip::tcp::acceptor acceptor{ io_service, endpoint };

    acceptor.listen();
    accept_and_run(acceptor, io_service);

    io_service.run();
}

unsigned char icon_data[] = {
    // reserved
    0x00, 0x00,
    // icon type (1 = icon)
    0x01, 0x00,
    // number of images (1)
    0x01, 0x00,
    // width, height (16x16)
    0x10, 0x10,
    // size of colour palette
    0x00,
    // reserved
    0x00,
    // colour planes (1)
    0x01, 0x00,
    // bits per pixel (32)
    0x20, 0x00,

    // size of data in bytes
    0x28, 0x04, 0x00, 0x00,

    // offset of bitmap data
    0x16, 0x00, 0x00, 0x00,

    // BEGIN BITMAPINFOHEADER
    // bcsize
    0x28, 0x00, 0x00, 0x00, // biSize
    0x10, 0x00, 0x00, 0x00, // biWidth
    0x20, 0x00, 0x00, 0x00, // biHeight (with both AND and XOR mask? wtf?)

    0x01, 0x00, // biPlanes
    0x20, 0x00, // biBitCount (32)

    0x00, 0x00, 0x00, 0x00, // biCompression
    0x00, 0x00, 0x00, 0x00, // biSizeImage
    0x00, 0x00, 0x00, 0x00, // biXPelsPerMeter
    0x00, 0x00, 0x00, 0x00, // biYPelsPerMeter
    0x00, 0x00, 0x00, 0x00, // biClrUsed
    0x00, 0x00, 0x00, 0x00, // biClrImportant
    // END BITMAPINFOHEADER

    // BITMAP DATA (4 bytes per pixel)
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF,
    0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0xFF,

    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF
};

unsigned char *get_icon(int *pOut) {
    *pOut = sizeof(icon_data);
    return icon_data;
}

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