#include <boost/beast/http.hpp>
#include <boost/beast/ssl.hpp>
#include <boost/beast/version.hpp>
#include <boost/asio/executor.hpp>
#include <boost/asio/strand.hpp>
#include <cstdlib>
#include <functional>
#include <iostream>
#include <memory>
#include <string>
namespace beast = boost::beast; // from <boost/beast.hpp>
namespace http = beast::http; // from <boost/beast/http.hpp>
namespace net = boost::asio; // from <boost/asio.hpp>
namespace ssl = boost::asio::ssl; // from <boost/asio/ssl.hpp>
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
//------------------------------------------------------------------------------
// Report a failure
void
fail(beast::error_code ec, char const* what)
{
std::cerr << what << ": " << ec.message() << "\n";
}
// Performs an HTTP GET and prints the response
class session : public std::enable_shared_from_this<session>
{
tcp::resolver resolver_;
beast::ssl_stream<beast::tcp_stream> stream_;
beast::flat_buffer buffer_; // (Must persist between reads)
http::request<http::empty_body> req_;
http::response<http::string_body> res_;
public:
explicit
session(
net::executor ex,
ssl::context& ctx)
: resolver_(ex)
, stream_(ex, ctx)
{
}
// Start the asynchronous operation
void
run(
char const* host,
char const* port,
char const* target)
{
// Set SNI Hostname (many hosts need this to handshake successfully)
if(! SSL_set_tlsext_host_name(stream_.native_handle(), host))
{
beast::error_code ec{static_cast<int>(::ERR_get_error()), net::error::get_ssl_category()};
std::cerr << ec.message() << "\n";
return;
}
// Set up an HTTP GET request message
// req_.version(version);
req_.method(http::verb::get);
req_.target(target);
req_.set(http::field::host, host);
req_.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
// Look up the domain name
resolver_.async_resolve(
host,
port,
beast::bind_front_handler(
&session::on_resolve,
shared_from_this()));
}
void
on_resolve(
beast::error_code ec,
tcp::resolver::results_type results)
{
if(ec)
return fail(ec, "resolve");
// Set a timeout on the operation
beast::get_lowest_layer(stream_).expires_after(std::chrono::seconds(30));
// Make the connection on the IP address we get from a lookup
beast::get_lowest_layer(stream_).async_connect(
results,
beast::bind_front_handler(
&session::on_connect,
shared_from_this()));
}
void
on_connect(beast::error_code ec, tcp::resolver::results_type::endpoint_type)
{
if(ec)
return fail(ec, "connect");
// Perform the SSL handshake
stream_.async_handshake(
ssl::stream_base::client,
beast::bind_front_handler(
&session::on_handshake,
shared_from_this()));
}
void
on_handshake(beast::error_code ec)
{
if(ec)
return fail(ec, "handshake");
// Set a timeout on the operation
beast::get_lowest_layer(stream_).expires_after(std::chrono::seconds(30));
// Send the HTTP request to the remote host
http::async_write(stream_, req_,
beast::bind_front_handler(
&session::on_write,
shared_from_this()));
}
void
on_write(
beast::error_code ec,
std::size_t bytes_transferred)
{
boost::ignore_unused(bytes_transferred);
if(ec)
return fail(ec, "write");
// Receive the HTTP response
http::async_read(stream_, buffer_, res_,
beast::bind_front_handler(
&session::on_read,
shared_from_this()));
}
void
on_read(
beast::error_code ec,
std::size_t bytes_transferred)
{
boost::ignore_unused(bytes_transferred);
if(ec)
return fail(ec, "read");
// Write the message to standard out
std::cout << res_ << std::endl;
// Set a timeout on the operation
beast::get_lowest_layer(stream_).expires_after(std::chrono::seconds(30));
// Gracefully close the stream
stream_.async_shutdown(
beast::bind_front_handler(
&session::on_shutdown,
shared_from_this()));
}
void
on_shutdown(beast::error_code ec)
{
if(ec == net::error::eof)
{
// Rationale:
// http://stackoverflow.com/questions/25587403/boost-asio-ssl-async-shutdown-always-finishes-with-an-error
ec = {};
}
if(ec)
return fail(ec, "shutdown");
// If we get here then the connection is closed gracefully
}
};
//------------------------------------------------------------------------------
int main(int argc, char** argv)
{
// The io_context is required for all I/O
net::io_context ioc;
// The SSL context is required, and holds certificates
ssl::context ctx{ssl::context::tlsv12_client};
// Verify the remote server's certificate
ctx.set_verify_mode(ssl::verify_peer);
ctx.set_default_verify_paths();
// Launch the asynchronous operation
// The session is constructed with a strand to
// ensure that handlers do not execute concurrently.
std::make_shared<session>(
net::make_strand(ioc),
ctx
)->run("api.binance.com", "443", "/api/v3/depth");
// Run the I/O service. The call will return when
// the get operation is complete.
ioc.run();
return EXIT_SUCCESS;
}
docs : https://binance-docs.github.io/apidocs/spot/en/#order-book
I am trying to get the order-book snapshot using http request, it seems that it is not working.
whats wrong here ?
Also, some other endpoints require api key configuration and i haven't found a single beast http client example that lets you do it.
advance thanks!
error :
Content-Type: application/json;charset=UTF-8
Content-Length: 95
Connection: keep-alive
Date: Fri, 22 Apr 2022 02:57:15 GMT
Server: nginx
x-mbx-uuid: 5a6a1b4b-b94a-48e1-bb29-d5e6e04dec2d
x-mbx-used-weight: 1
x-mbx-used-weight-1m: 1
Strict-Transport-Security: max-age=31536000; includeSubdomains
X-Frame-Options: SAMEORIGIN
X-Xss-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Content-Security-Policy: default-src 'self'
X-Content-Security-Policy: default-src 'self'
X-WebKit-CSP: default-src 'self'
Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0
X-Cache: Error from cloudfront
Via: 1.1 51e2dff3d89b89a15e6f1fb094173408.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: MAA51-P1
X-Amz-Cf-Id: dWVPcdXGgFqav6nvGdXVs_sBvP29t0QBS8r9VRkK8yx2ln2nX45uUg==
{"code":-1102,"msg":"Mandatory parameter 'symbol' was not sent, was empty/null, or malformed."}
