beast如何发送请求参数
how to send request parameters with beast
我正在尝试发送到服务器的文档中的正文：https://binance-docs.github.io/apidocs/spot/en/#order-book
// 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);
req_.body() = "symbol=btcusdt";
req_.prepare_payload(); // make HTTP 1.1 compliant
// Look up the domain name
resolver_.async_resolve(
host,
port,
beast::bind_front_handler(
&session::on_resolve,
shared_from_this()));
}
如您所见，req_.body() = "symbol=btcusdt"; 显然无法正常工作（这是我从 Whosebug 获得的），还有其他方法吗？我不想使用 boost json 来发送正文，也许可以使用 jsoncpp。请帮助我并提前谢谢！
As you can see req_.body() = "symbol=btcusdt"; clearly not working(which i got from Whosebug),
你不是从 Whosebug 得到的。你:
req_.body() = serialize(json::object {{"symbol", "btcusdt"}});
req_.prepare_payload(); // make HTTP 1.1 compliant
现在，如果您对此有任何疑问，您忘记描述问题所在了。
如, it doesn't normally make sense to pass content with a GET request (background: ).
检查 the docs 确认它应该是 GET。因此，它可能需要查询参数。用 "/api/v3/depth?symbol=btcusdt" 戳它得到
{"code":-1100,"msg":"Illegal characters found in parameter 'symbol'; legal range is '^[A-Z0-9-_.]{1,20}$'."}
shutdown: stream truncated
所以，是的，它读取那些。 "/api/v3/depth?symbol=BTCUSDT" 修复错误：
{"lastUpdateId":18749392570,"bids":[["38337.57000000","2.48048000"],["38337.53000000","0.00391000"],["38336.74000000","0.03264000"],["38336.73000000","0.35211000"],["38336.72000000","0.13042000"],["38336.08000000","0.00455000"],["38335.00000000","0.09385000"],["38334.83000000","0.38462000"],["38334.82000000","0.39125000"],["38334.73000000","0.00052000"],["38334.69000000","0.00037000"],["38334.43000000","0.09528000"],["38333.01000000","0.00400000"],["38332.78000000","0.00037000"],["38332.71000000","0.01319000"],["38331.84000000","0.00833000"],["38331.46000000","0.39126000"],["38331.41000000","0.04000000"],["38330.93000000","0.39128000"],["38330.83000000","1.20000000"],["38330.33000000","0.24000000"],["38329.94000000","0.06407000"],["38329.90000000","0.06000000"],["38329.44000000","0.35216000"],["38329.39000000","0.39131000"],["38329.22000000","0.94299000"],["38327.88000000","0.01829000"],["38326.06000000","0.06000000"],["38325.76000000","0.01738000"],["38325.69000000","0.39133000"],["38324.82000000","0.02000000"],["38324.53000000","0.03771000"],["38323.43000000","0.01423000"],["38323.17000000","0.06352000"],["38323.01000000","0.11626000"],["38322.97000000","0.26100000"],["38322.82000000","1.95599000"],["38322.64000000","0.24845000"],["38322.36000000","0.00260000"],["38322.32000000","0.00187000"],["38322.27000000","0.23664000"],["38322.23000000","0.06000000"],["38321.90000000","0.24187000"],["38320.80000000","0.01048000"],["38320.70000000","0.00964000"],["38320.43000000","0.02202000"],["38320.39000000","0.09000000"],["38320.26000000","0.98600000"],["38320.00000000","0.05333000"],["38319.69000000","0.16310000"],["38319.59000000","0.03000000"],["38319.49000000","0.00037000"],["38319.45000000","0.06000000"],["38318.60000000","0.15000000"],["38318.41000000","0.02600000"],["38317.94000000","0.03086000"],["38317.57000000","0.00037000"],["38317.28000000","1.97450000"],["38317.18000000","0.01232000"],["38317.07000000","0.07704000"],["38316.71000000","0.01105000"],["38316.42000000","0.26120000"],["38316.41000000","0.03933000"],["38315.53000000","0.39000000"],["38315.05000000","2.51774000"],["38314.81000000","0.00903000"],["38314.59000000","0.34420000"],["38313.73000000","0.30000000"],["38313.60000000","0.03706000"],["38313.04000000","0.01234000"],["38312.79000000","0.00040000"],["38312.74000000","0.00160000"],["38312.64000000","0.03970000"],["38312.45000000","0.03989000"],["38311.93000000","0.00100000"],["38311.80000000","0.19965000"],["38311.68000000","0.03787000"],["38310.81000000","0.03086000"],["38310.79000000","0.00652000"],["38310.72000000","0.00180000"],["38310.39000000","0.07902000"],["38310.30000000","0.00027000"],["38310.16000000","0.00037000"],["38310.12000000","0.00100000"],["38310.00000000","0.05221000"],["38309.42000000","0.00505000"],["38309.29000000","0.02601000"],["38309.28000000","0.02601000"],["38309.27000000","0.02601000"],["38308.35000000","0.03918000"],["38308.24000000","0.00037000"],["38307.90000000","0.04000000"],["38307.60000000","0.00034000"],["38305.40000000","5.56346000"],["38304.47000000","0.87474000"],["38304.16000000","0.04030000"],["38304.00000000","0.09062000"],["38303.40000000","0.47680000"],["38303.29000000","0.28900000"],["38303.24000000","0.05433000"]],"asks":[["38337.58000000","0.59927000"],["38337.59000000","0.01654000"],["38338.13000000","0.00400000"],["38338.15000000","0.00900000"],["38340.27000000","0.00027000"],["38340.45000000","0.00037000"],["38342.37000000","0.00037000"],["38342.44000000","0.05200000"],["38343.93000000","0.01976000"],["38344.51000000","0.13042000"],["38345.19000000","0.44713000"],["38345.28000000","0.04998000"],["38345.43000000","0.26087000"],["38346.10000000","0.26089000"],["38346.12000000","0.26100000"],["38346.23000000","0.00991000"],["38346.24000000","0.04876000"],["38346.59000000","0.26086000"],["38347.13000000","0.01940000"],["38347.20000000","0.04705000"],["38347.40000000","0.26100000"],["38347.44000000","0.02478000"],["38347.45000000","0.00266000"],["38347.47000000","0.01491000"],["38347.66000000","0.07824000"],["38348.16000000","0.14054000"],["38348.48000000","0.26085000"],["38349.93000000","0.10000000"],["38350.00000000","0.00055000"],["38350.08000000","0.09146000"],["38350.33000000","0.00037000"],["38351.23000000","0.02553000"],["38352.00000000","0.17533000"],["38352.22000000","0.74700000"],["38352.40000000","0.26085000"],["38352.50000000","1.98993000"],["38352.75000000","0.00100000"],["38352.92000000","0.06000000"],["38353.92000000","0.09146000"],["38354.16000000","0.10000000"],["38355.10000000","0.10000000"],["38355.87000000","0.01829000"],["38356.19000000","0.12915000"],["38356.81000000","0.04000000"],["38358.94000000","0.10000000"],["38359.02000000","0.00187000"],["38359.04000000","0.57852000"],["38359.27000000","0.00037000"],["38359.66000000","0.09730000"],["38359.92000000","0.05000000"],["38360.00000000","0.26059000"],["38360.01000000","0.00525000"],["38360.65000000","0.00100000"],["38361.18000000","0.00037000"],["38361.83000000","0.10000000"],["38363.42000000","0.01940000"],["38363.81000000","0.00037000"],["38364.66000000","1.91518000"],["38364.88000000","0.02609000"],["38366.58000000","0.10000000"],["38366.60000000","0.14645000"],["38366.82000000","0.02601000"],["38366.83000000","0.02601000"],["38366.84000000","0.02601000"],["38367.18000000","0.00037000"],["38367.47000000","0.00140000"],["38368.35000000","0.22000000"],["38368.59000000","0.01301000"],["38368.91000000","0.01824000"],["38369.10000000","0.00037000"],["38369.61000000","0.00170000"],["38370.00000000","0.05214000"],["38370.30000000","0.00652000"],["38370.40000000","0.01105000"],["38370.69000000","0.00050000"],["38370.81000000","0.15840000"],["38371.11000000","0.03086000"],["38371.18000000","0.00410000"],["38371.49000000","0.00037000"],["38372.35000000","0.07818000"],["38372.98000000","0.03978000"],["38373.12000000","1.05945000"],["38373.20000000","0.03086000"],["38373.67000000","0.06000000"],["38373.95000000","0.03000000"],["38374.04000000","0.05434000"],["38374.19000000","1.48075000"],["38374.41000000","0.05447000"],["38374.55000000","0.09000000"],["38374.64000000","0.00902000"],["38374.80000000","0.00120000"],["38374.91000000","0.26059000"],["38374.92000000","4.97054000"],["38375.05000000","0.00357000"],["38375.26000000","0.00050000"],["38375.61000000","6.50000000"],["38376.62000000","0.04173000"],["38376.97000000","1.48075000"],["38378.17000000","0.03908000"],["38378.18000000","0.06270000"]]}
正解
您应该添加查询参数。 Beast 没有这方面的设施：
It is the caller's responsibility to ensure that the request target string follows the syntax rules for URIs used with HTTP. In particular, reserved or special characters must be url-encoded. The implementation does not perform syntax checking on the passed string.
因此请考虑使用诸如Boost URL:
static boost::url_view const base_api{"wss://api.binance.com/api/v3/"};
boost::url method{"depth"};
method.params().emplace_back("symbol", "BTCUSDT");
std::make_shared<session>(net::make_strand(ioc), ctx)
->run(make_url(base_api, method));
其中 make_url 是 boost::urls::resolve 的便利包装：
boost::url make_url(boost::url_view base_api, boost::url_view method) {
assert(!method.is_path_absolute());
assert(base_api.data()[base_api.size() - 1] == '/');
boost::urls::error_code ec;
boost::url url;
resolve(base_api, method, url, ec);
if (ec)
throw boost::system::system_error(ec);
return url;
}
这也允许在 run 中进行一些简化：
run(boost::url_view url) {
std::string const host(url.host());
std::string const service = url.has_port() //
? url.port()
: (url.scheme_id() == boost::urls::scheme::wss) //
? "https"
: "http";
url.remove_origin(); // becomes target
完整列表
#include <boost/asio.hpp>
#include <boost/beast.hpp>
#include <boost/beast/ssl.hpp>
#include <boost/json.hpp>
#include <boost/json/src.hpp>
#include <functional>
#include <iostream>
#include <memory>
#include <string>
#include <boost/url.hpp>
#include <boost/url/src.hpp> // for "header-only"
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>
namespace json = boost::json;
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
using executor = net::any_io_executor; // boost 1.78 compat, comment if not applicable
//------------------------------------------------------------------------------
boost::url make_url(boost::url_view base_api, boost::url_view method) {
assert(!method.is_path_absolute());
assert(base_api.data()[base_api.size() - 1] == '/');
boost::urls::error_code ec;
boost::url url;
resolve(base_api, method, url, ec);
if (ec)
throw boost::system::system_error(ec);
return url;
}
// 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::string_body> req_;
http::response<http::string_body> res_;
public:
explicit session(executor ex, ssl::context& ctx)
: resolver_(ex)
, stream_(ex, ctx) {}
// Start the asynchronous operation
void
run(boost::url url) {
std::string const host(url.host());
std::string const service = url.has_port() //
? url.port()
: (url.scheme_id() == boost::urls::scheme::wss) //
? "https"
: "http";
url.remove_origin(); // becomes req_.target()
// Set SNI Hostname (many hosts need this to handshake successfully)
if(! SSL_set_tlsext_host_name(stream_.native_handle(), host.c_str()))
{
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(url.c_str());
req_.set(http::field::host, host);
req_.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
//req_.body() = serialize(json::object {{"symbol", "btcusdt"}});
req_.prepare_payload(); // make HTTP 1.1 compliant
// Look up the domain name
resolver_.async_resolve(host, service,
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
std::cout << "Sending " << req_ << std::endl;
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:
//
ec = {};
}
if(ec)
return fail(ec, "shutdown");
// If we get here then the connection is closed gracefully
}
};
//------------------------------------------------------------------------------
int main() {
// 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
// see for endpoints: https://binance-docs.github.io/apidocs/spot/en/#general-info
static boost::url_view const base_api{"wss://api.binance.com/api/v3/"};
boost::url method{"depth"};
method.params().emplace_back("symbol", "BTCUSDT");
// 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(make_url(base_api, method));
// Run the I/O service. The call will return when
// the get operation is complete.
ioc.run();
}
版画
url: wss://api.binance.com/api/v3/depth?symbol=BTCUSDT
url.host(): api.binance.com
url.encoded_path(): /api/v3/depth
url.encoded_origin(): wss://api.binance.com
url.encoded_query(): symbol=BTCUSDT
url.encoded_authority(): api.binance.com
Sending GET /api/v3/depth?symbol=BTCUSDT HTTP/1.1
Host: api.binance.com
User-Agent: Boost.Beast/322
HTTP/1.1 200 OK
Content-Type: application/json;charset=UTF-8
Content-Length: 6447
Connection: keep-alive
Date: Tue, 26 Apr 2022 22:47:24 GMT
Server: nginx
Vary: Accept-Encoding
x-mbx-uuid: 9e00433d-5123-472c-9bf1-10104394266d
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
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, HEAD, OPTIONS
X-Cache: Miss from cloudfront
Via: 1.1 fa544a973edca8926f95609301f23b66.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: DUS51-P2
X-Amz-Cf-Id: NIOqhB8rrl5nqCo_-TBwYPkgPXdREtQY4PwIi441WxjKRMOoeBkERQ==
{"lastUpdateId":18749934602,"bids":[["38290.70000000","4.61843000"],["38290.69000000","0.00060000"],["38290.65000000","0.00416000"],["38290.34000000","0.35254000"],["38290.33000000","0.75000000"],["38289.79000000","0.13058000"],["38289.00000000","0.18264000"],["38288.82000000","0.39171000"],["38288.63000000","0.00052000"],["38288.62000000","0.29100000"],["38288.02000000","0.39173000"],["38288.01000000","0.13484000"],["38287.31000000","0.53725000"],["38286.71000000","0.01319000"],["38286.70000000","1.74256000"],["38285.48000000","0.04000000"],["38285.41000000","0.57240000"],["38284.97000000","5.41100000"],["38284.96000000","2.50745000"],["38284.95000000","0.00091000"],["38284.14000000","0.00100000"],["38283.95000000","0.00027000"],["38283.81000000","0.74700000"],["38283.72000000","0.39175000"],["38283.14000000","0.39177000"],["38283.04000000","0.06000000"],["38282.99000000","0.35261000"],["38282.81000000","2.41006000"],["38282.54000000","0.39178000"],["38281.24000000","0.00400000"],["38281.13000000","0.75000000"],["38281.00000000","0.10000000"],["38280.99000000","0.04000000"],["38280.84000000","0.01829000"],["38280.44000000","0.00027000"],["38280.00000000","0.05225000"],["38279.53000000","0.45585000"],["38279.21000000","0.06000000"],["38278.89000000","0.00029000"],["38278.76000000","0.12000000"],["38277.61000000","0.04000000"],["38276.08000000","0.08000000"],["38275.62000000","0.07982000"],["38275.48000000","0.00900000"],["38275.42000000","0.26100000"],["38275.38000000","0.06000000"],["38274.31000000","0.26100000"],["38274.29000000","0.00340000"],["38274.28000000","0.80417000"],["38274.24000000","0.44994000"],["38273.47000000","0.03000000"],["38273.43000000","0.12968000"],["38272.96000000","0.04102000"],["38272.86000000","0.03091000"],["38272.68000000","1.89237000"],["38271.97000000","0.01304000"],["38271.79000000","0.00416000"],["38271.73000000","0.00028000"],["38271.48000000","0.06000000"],["38271.40000000","0.00037000"],["38270.64000000","0.02600000"],["38270.63000000","0.00027000"],["38270.46000000","0.10000000"],["38270.45000000","0.75000000"],["38270.41000000","0.66800000"],["38270.00000000","0.05356000"],["38269.77000000","0.02615000"],["38269.76000000","0.02615000"],["38269.45000000","0.00037000"],["38269.44000000","0.09999000"],["38269.09000000","0.58398000"],["38269.02000000","0.07824000"],["38269.00000000","0.00169000"],["38268.92000000","0.31167000"],["38268.88000000","0.00306000"],["38268.83000000","0.02028000"],["38268.81000000","0.12271000"],["38268.36000000","0.39000000"],["38268.19000000","0.04166000"],["38267.89000000","1.93553000"],["38267.52000000","0.01041000"],["38267.31000000","0.00027000"],["38267.12000000","0.00037000"],["38266.66000000","0.04000000"],["38266.35000000","0.09000000"],["38265.65000000","0.75000000"],["38265.63000000","0.00037000"],["38265.60000000","0.00057000"],["38265.55000000","2.54224000"],["38265.39000000","0.15000000"],["38265.27000000","0.01047000"],["38265.20000000","0.10000000"],["38265.10000000","0.10000000"],["38264.94000000","0.03086000"],["38264.19000000","0.03086000"],["38263.48000000","0.03960000"],["38263.39000000","0.62956000"],["38262.53000000","0.02615000"],["38261.88000000","0.28928000"],["38261.84000000","0.00037000"]],"asks":[["38290.71000000","1.11417000"],["38290.73000000","0.59583000"],["38291.16000000","0.00900000"],["38291.98000000","0.02421000"],["38292.63000000","0.00522000"],["38293.95000000","0.00307000"],["38294.17000000","0.01310000"],["38294.30000000","0.00037000"],["38295.50000000","0.00037000"],["38296.22000000","0.75000000"],["38297.00000000","0.01469000"],["38297.16000000","0.75000000"],["38297.36000000","0.00041000"],["38297.42000000","0.00037000"],["38297.62000000","0.10660000"],["38298.13000000","0.00783000"],["38298.14000000","0.00339000"],["38298.18000000","0.61816000"],["38298.24000000","0.09585000"],["38298.32000000","0.01910000"],["38298.63000000","0.26119000"],["38299.00000000","0.01486000"],["38299.70000000","0.13057000"],["38300.00000000","24.61496000"],["38300.16000000","0.09585000"],["38300.85000000","0.12969000"],["38300.91000000","0.00037000"],["38301.48000000","0.26149000"],["38301.62000000","0.04340000"],["38302.08000000","0.14125000"],["38302.20000000","0.06000000"],["38302.69000000","0.01020000"],["38302.78000000","0.75000000"],["38302.84000000","0.04702000"],["38302.88000000","0.00037000"],["38303.04000000","0.04823000"],["38303.25000000","0.26118000"],["38303.30000000","0.00100000"],["38303.57000000","0.08000000"],["38304.00000000","0.14262000"],["38304.04000000","0.00100000"],["38304.10000000","0.25976000"],["38304.39000000","0.94299000"],["38304.80000000","0.00037000"],["38304.96000000","0.08314000"],["38305.04000000","0.00050000"],["38305.10000000","0.32000000"],["38305.16000000","0.07648000"],["38305.34000000","0.00040000"],["38305.66000000","0.10000000"],["38305.72000000","0.10000000"],["38306.19000000","0.26114000"],["38306.25000000","0.64000000"],["38306.48000000","0.00055000"],["38306.72000000","0.75000000"],["38306.73000000","0.26116000"],["38306.80000000","0.74700000"],["38306.91000000","0.07105000"],["38306.92000000","0.00260000"],["38307.06000000","1.93567000"],["38307.11000000","0.00037000"],["38307.55000000","0.01829000"],["38307.60000000","0.00034000"],["38309.64000000","0.03000000"],["38310.00000000","0.30197000"],["38310.15000000","0.01827000"],["38310.24000000","0.04923000"],["38310.30000000","0.00027000"],["38310.68000000","0.05000000"],["38310.76000000","0.05454000"],["38310.87000000","0.09141000"],["38311.29000000","0.00059000"],["38311.42000000","0.02300000"],["38311.64000000","0.01105000"],["38312.29000000","0.03939000"],["38313.03000000","0.00221000"],["38313.43000000","0.12801000"],["38313.57000000","1.97481000"],["38314.24000000","0.00052000"],["38314.34000000","0.75000000"],["38315.53000000","0.04020000"],["38315.56000000","0.02727000"],["38315.70000000","0.00064000"],["38315.78000000","0.00904000"],["38316.45000000","0.00074000"],["38316.80000000","0.06000000"],["38317.12000000","0.05453000"],["38317.26000000","0.12029000"],["38317.59000000","0.30000000"],["38317.61000000","0.00030000"],["38317.65000000","0.06813000"],["38318.20000000","0.24169000"],["38318.28000000","0.02581000"],["38318.56000000","0.31333000"],["38318.81000000","0.04102000"],["38318.82000000","0.03086000"],["38319.67000000","0.03086000"],["38319.98000000","0.00885000"],["38319.99000000","0.01051000"],["38320.00000000","0.05221000"]]}
shutdown: stream truncated
我正在尝试发送到服务器的文档中的正文：https://binance-docs.github.io/apidocs/spot/en/#order-book
// 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);
req_.body() = "symbol=btcusdt";
req_.prepare_payload(); // make HTTP 1.1 compliant
// Look up the domain name
resolver_.async_resolve(
host,
port,
beast::bind_front_handler(
&session::on_resolve,
shared_from_this()));
}
如您所见，req_.body() = "symbol=btcusdt"; 显然无法正常工作（这是我从 Whosebug 获得的），还有其他方法吗？我不想使用 boost json 来发送正文，也许可以使用 jsoncpp。请帮助我并提前谢谢！
As you can see req_.body() = "symbol=btcusdt"; clearly not working(which i got from Whosebug),
你不是从 Whosebug 得到的。你
req_.body() = serialize(json::object {{"symbol", "btcusdt"}});
req_.prepare_payload(); // make HTTP 1.1 compliant
现在，如果您对此有任何疑问，您忘记描述问题所在了。
如
检查 the docs 确认它应该是 GET。因此，它可能需要查询参数。用 "/api/v3/depth?symbol=btcusdt" 戳它得到
{"code":-1100,"msg":"Illegal characters found in parameter 'symbol'; legal range is '^[A-Z0-9-_.]{1,20}$'."}
shutdown: stream truncated
所以，是的，它读取那些。 "/api/v3/depth?symbol=BTCUSDT" 修复错误：
{"lastUpdateId":18749392570,"bids":[["38337.57000000","2.48048000"],["38337.53000000","0.00391000"],["38336.74000000","0.03264000"],["38336.73000000","0.35211000"],["38336.72000000","0.13042000"],["38336.08000000","0.00455000"],["38335.00000000","0.09385000"],["38334.83000000","0.38462000"],["38334.82000000","0.39125000"],["38334.73000000","0.00052000"],["38334.69000000","0.00037000"],["38334.43000000","0.09528000"],["38333.01000000","0.00400000"],["38332.78000000","0.00037000"],["38332.71000000","0.01319000"],["38331.84000000","0.00833000"],["38331.46000000","0.39126000"],["38331.41000000","0.04000000"],["38330.93000000","0.39128000"],["38330.83000000","1.20000000"],["38330.33000000","0.24000000"],["38329.94000000","0.06407000"],["38329.90000000","0.06000000"],["38329.44000000","0.35216000"],["38329.39000000","0.39131000"],["38329.22000000","0.94299000"],["38327.88000000","0.01829000"],["38326.06000000","0.06000000"],["38325.76000000","0.01738000"],["38325.69000000","0.39133000"],["38324.82000000","0.02000000"],["38324.53000000","0.03771000"],["38323.43000000","0.01423000"],["38323.17000000","0.06352000"],["38323.01000000","0.11626000"],["38322.97000000","0.26100000"],["38322.82000000","1.95599000"],["38322.64000000","0.24845000"],["38322.36000000","0.00260000"],["38322.32000000","0.00187000"],["38322.27000000","0.23664000"],["38322.23000000","0.06000000"],["38321.90000000","0.24187000"],["38320.80000000","0.01048000"],["38320.70000000","0.00964000"],["38320.43000000","0.02202000"],["38320.39000000","0.09000000"],["38320.26000000","0.98600000"],["38320.00000000","0.05333000"],["38319.69000000","0.16310000"],["38319.59000000","0.03000000"],["38319.49000000","0.00037000"],["38319.45000000","0.06000000"],["38318.60000000","0.15000000"],["38318.41000000","0.02600000"],["38317.94000000","0.03086000"],["38317.57000000","0.00037000"],["38317.28000000","1.97450000"],["38317.18000000","0.01232000"],["38317.07000000","0.07704000"],["38316.71000000","0.01105000"],["38316.42000000","0.26120000"],["38316.41000000","0.03933000"],["38315.53000000","0.39000000"],["38315.05000000","2.51774000"],["38314.81000000","0.00903000"],["38314.59000000","0.34420000"],["38313.73000000","0.30000000"],["38313.60000000","0.03706000"],["38313.04000000","0.01234000"],["38312.79000000","0.00040000"],["38312.74000000","0.00160000"],["38312.64000000","0.03970000"],["38312.45000000","0.03989000"],["38311.93000000","0.00100000"],["38311.80000000","0.19965000"],["38311.68000000","0.03787000"],["38310.81000000","0.03086000"],["38310.79000000","0.00652000"],["38310.72000000","0.00180000"],["38310.39000000","0.07902000"],["38310.30000000","0.00027000"],["38310.16000000","0.00037000"],["38310.12000000","0.00100000"],["38310.00000000","0.05221000"],["38309.42000000","0.00505000"],["38309.29000000","0.02601000"],["38309.28000000","0.02601000"],["38309.27000000","0.02601000"],["38308.35000000","0.03918000"],["38308.24000000","0.00037000"],["38307.90000000","0.04000000"],["38307.60000000","0.00034000"],["38305.40000000","5.56346000"],["38304.47000000","0.87474000"],["38304.16000000","0.04030000"],["38304.00000000","0.09062000"],["38303.40000000","0.47680000"],["38303.29000000","0.28900000"],["38303.24000000","0.05433000"]],"asks":[["38337.58000000","0.59927000"],["38337.59000000","0.01654000"],["38338.13000000","0.00400000"],["38338.15000000","0.00900000"],["38340.27000000","0.00027000"],["38340.45000000","0.00037000"],["38342.37000000","0.00037000"],["38342.44000000","0.05200000"],["38343.93000000","0.01976000"],["38344.51000000","0.13042000"],["38345.19000000","0.44713000"],["38345.28000000","0.04998000"],["38345.43000000","0.26087000"],["38346.10000000","0.26089000"],["38346.12000000","0.26100000"],["38346.23000000","0.00991000"],["38346.24000000","0.04876000"],["38346.59000000","0.26086000"],["38347.13000000","0.01940000"],["38347.20000000","0.04705000"],["38347.40000000","0.26100000"],["38347.44000000","0.02478000"],["38347.45000000","0.00266000"],["38347.47000000","0.01491000"],["38347.66000000","0.07824000"],["38348.16000000","0.14054000"],["38348.48000000","0.26085000"],["38349.93000000","0.10000000"],["38350.00000000","0.00055000"],["38350.08000000","0.09146000"],["38350.33000000","0.00037000"],["38351.23000000","0.02553000"],["38352.00000000","0.17533000"],["38352.22000000","0.74700000"],["38352.40000000","0.26085000"],["38352.50000000","1.98993000"],["38352.75000000","0.00100000"],["38352.92000000","0.06000000"],["38353.92000000","0.09146000"],["38354.16000000","0.10000000"],["38355.10000000","0.10000000"],["38355.87000000","0.01829000"],["38356.19000000","0.12915000"],["38356.81000000","0.04000000"],["38358.94000000","0.10000000"],["38359.02000000","0.00187000"],["38359.04000000","0.57852000"],["38359.27000000","0.00037000"],["38359.66000000","0.09730000"],["38359.92000000","0.05000000"],["38360.00000000","0.26059000"],["38360.01000000","0.00525000"],["38360.65000000","0.00100000"],["38361.18000000","0.00037000"],["38361.83000000","0.10000000"],["38363.42000000","0.01940000"],["38363.81000000","0.00037000"],["38364.66000000","1.91518000"],["38364.88000000","0.02609000"],["38366.58000000","0.10000000"],["38366.60000000","0.14645000"],["38366.82000000","0.02601000"],["38366.83000000","0.02601000"],["38366.84000000","0.02601000"],["38367.18000000","0.00037000"],["38367.47000000","0.00140000"],["38368.35000000","0.22000000"],["38368.59000000","0.01301000"],["38368.91000000","0.01824000"],["38369.10000000","0.00037000"],["38369.61000000","0.00170000"],["38370.00000000","0.05214000"],["38370.30000000","0.00652000"],["38370.40000000","0.01105000"],["38370.69000000","0.00050000"],["38370.81000000","0.15840000"],["38371.11000000","0.03086000"],["38371.18000000","0.00410000"],["38371.49000000","0.00037000"],["38372.35000000","0.07818000"],["38372.98000000","0.03978000"],["38373.12000000","1.05945000"],["38373.20000000","0.03086000"],["38373.67000000","0.06000000"],["38373.95000000","0.03000000"],["38374.04000000","0.05434000"],["38374.19000000","1.48075000"],["38374.41000000","0.05447000"],["38374.55000000","0.09000000"],["38374.64000000","0.00902000"],["38374.80000000","0.00120000"],["38374.91000000","0.26059000"],["38374.92000000","4.97054000"],["38375.05000000","0.00357000"],["38375.26000000","0.00050000"],["38375.61000000","6.50000000"],["38376.62000000","0.04173000"],["38376.97000000","1.48075000"],["38378.17000000","0.03908000"],["38378.18000000","0.06270000"]]}
正解
您应该添加查询参数。 Beast 没有这方面的设施：
It is the caller's responsibility to ensure that the request target string follows the syntax rules for URIs used with HTTP. In particular, reserved or special characters must be url-encoded. The implementation does not perform syntax checking on the passed string.
因此请考虑使用诸如Boost URL:
static boost::url_view const base_api{"wss://api.binance.com/api/v3/"};
boost::url method{"depth"};
method.params().emplace_back("symbol", "BTCUSDT");
std::make_shared<session>(net::make_strand(ioc), ctx)
->run(make_url(base_api, method));
其中 make_url 是 boost::urls::resolve 的便利包装：
boost::url make_url(boost::url_view base_api, boost::url_view method) {
assert(!method.is_path_absolute());
assert(base_api.data()[base_api.size() - 1] == '/');
boost::urls::error_code ec;
boost::url url;
resolve(base_api, method, url, ec);
if (ec)
throw boost::system::system_error(ec);
return url;
}
这也允许在 run 中进行一些简化：
run(boost::url_view url) {
std::string const host(url.host());
std::string const service = url.has_port() //
? url.port()
: (url.scheme_id() == boost::urls::scheme::wss) //
? "https"
: "http";
url.remove_origin(); // becomes target
完整列表
#include <boost/asio.hpp>
#include <boost/beast.hpp>
#include <boost/beast/ssl.hpp>
#include <boost/json.hpp>
#include <boost/json/src.hpp>
#include <functional>
#include <iostream>
#include <memory>
#include <string>
#include <boost/url.hpp>
#include <boost/url/src.hpp> // for "header-only"
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>
namespace json = boost::json;
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
using executor = net::any_io_executor; // boost 1.78 compat, comment if not applicable
//------------------------------------------------------------------------------
boost::url make_url(boost::url_view base_api, boost::url_view method) {
assert(!method.is_path_absolute());
assert(base_api.data()[base_api.size() - 1] == '/');
boost::urls::error_code ec;
boost::url url;
resolve(base_api, method, url, ec);
if (ec)
throw boost::system::system_error(ec);
return url;
}
// 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::string_body> req_;
http::response<http::string_body> res_;
public:
explicit session(executor ex, ssl::context& ctx)
: resolver_(ex)
, stream_(ex, ctx) {}
// Start the asynchronous operation
void
run(boost::url url) {
std::string const host(url.host());
std::string const service = url.has_port() //
? url.port()
: (url.scheme_id() == boost::urls::scheme::wss) //
? "https"
: "http";
url.remove_origin(); // becomes req_.target()
// Set SNI Hostname (many hosts need this to handshake successfully)
if(! SSL_set_tlsext_host_name(stream_.native_handle(), host.c_str()))
{
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(url.c_str());
req_.set(http::field::host, host);
req_.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
//req_.body() = serialize(json::object {{"symbol", "btcusdt"}});
req_.prepare_payload(); // make HTTP 1.1 compliant
// Look up the domain name
resolver_.async_resolve(host, service,
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
std::cout << "Sending " << req_ << std::endl;
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:
//
ec = {};
}
if(ec)
return fail(ec, "shutdown");
// If we get here then the connection is closed gracefully
}
};
//------------------------------------------------------------------------------
int main() {
// 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
// see for endpoints: https://binance-docs.github.io/apidocs/spot/en/#general-info
static boost::url_view const base_api{"wss://api.binance.com/api/v3/"};
boost::url method{"depth"};
method.params().emplace_back("symbol", "BTCUSDT");
// 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(make_url(base_api, method));
// Run the I/O service. The call will return when
// the get operation is complete.
ioc.run();
}
版画
url: wss://api.binance.com/api/v3/depth?symbol=BTCUSDT
url.host(): api.binance.com
url.encoded_path(): /api/v3/depth
url.encoded_origin(): wss://api.binance.com
url.encoded_query(): symbol=BTCUSDT
url.encoded_authority(): api.binance.com
Sending GET /api/v3/depth?symbol=BTCUSDT HTTP/1.1
Host: api.binance.com
User-Agent: Boost.Beast/322
HTTP/1.1 200 OK
Content-Type: application/json;charset=UTF-8
Content-Length: 6447
Connection: keep-alive
Date: Tue, 26 Apr 2022 22:47:24 GMT
Server: nginx
Vary: Accept-Encoding
x-mbx-uuid: 9e00433d-5123-472c-9bf1-10104394266d
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
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, HEAD, OPTIONS
X-Cache: Miss from cloudfront
Via: 1.1 fa544a973edca8926f95609301f23b66.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: DUS51-P2
X-Amz-Cf-Id: NIOqhB8rrl5nqCo_-TBwYPkgPXdREtQY4PwIi441WxjKRMOoeBkERQ==
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shutdown: stream truncated