本文介绍了Boost asio:无法读取URL正文(JSON)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经测试了以下Boost :: Asio最小HTTP服务器示例:(基于Boost:Asio的最小HTTP服务器)
I have test the following Boost::Asio minimal HTTP server example:(Minimal HTTP Server based on Boost:Asio)
我能够成功收集Header信息，例如Content-Length，但是当我尝试读取Body信息时，该示例挂起.这是尝试读取正文信息的函数:
I'm able to successfully collect the Header information such as Content-Length but the example hangs when I try to read the Body information. Here is the function that attempts to read the Body information:
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");
});
}
我已经使用 libmicrohttpd 解决方案成功读取了相同的正文信息.
I have successfully read the same Body information utilizing a solution with libmicrohttpd.
是否有更正确的方法来通过Boost:ASIO读取正文(JSON)信息?
Is there a more correct means to read the Body (JSON) information with Boost:ASIO?
推荐答案
问题的实质是双重的:
-
首先，存在未定义的行为，因为您无法在其中捕获
bufptr完成处理程序，这意味着在syscall向其写入数据时已经释放了向量...
firstly, there is Undefined Behaviour because you fail to capture
bufptrin the completion handler, meaning that the vector is already freed by the time that the syscall is writing to it...
其次，您正在垃圾邮件"正文的第一部分，因为在阅读标题时已经收到了它.您应该添加代码以保留在read_next_line中已经收到的零件.
Secondly, you're "junking" the first part of the body, as you have already received it when reading the headers. You should add code to preserve the part that was already received in read_next_line.
真正的误导"可能是在使用
The real "misguidance" is probably in the use of
asio::async_read_until(pThis->socket, pThis->buff, '\r', ...
好像它将以某种方式接收到一行一样.套接字不能那样工作.您会收到一个小包. TCP堆栈决定什么构成一个数据包. Asio只是承诺读取直到"数据包>包含<分隔符.它并没有说它不会收到更多，只是没有安排其他接收操作.
as if it will somehow receive exactly a single line. Sockets do not work that way. You'll receive a packet. The TCP stack(s) decide what constitutes a packet. Asio just promises to read "until" the packet >contains< the delimiter. It doesn't say it won't receive more, it just doesn't schedule another receive operation.
因此，要真正解决它，您可以简单地一次读取所有标头:
So, to really fix it, you might simply read all headers at once:
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);
注意同样，重要的是不要假设报头结尾与数据包边界重合.因此，从耗尽已经收到的可用输入开始read_body():
NOTE Again, it's important not to assume that the end-of-headers coincides with the packet boundary. Therefore, start read_body() with draining the available input already received:
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
#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;
}
这篇关于Boost asio:无法读取URL正文(JSON)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！