mirror of
https://github.com/XRPLF/rippled.git
synced 2026-02-06 15:05:31 +00:00
615 lines
17 KiB
C++
615 lines
17 KiB
C++
#include <xrpl/basics/Log.h>
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#include <xrpl/beast/core/LexicalCast.h>
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#include <xrpl/net/AutoSocket.h>
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#include <xrpl/net/HTTPClient.h>
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#include <xrpl/net/HTTPClientSSLContext.h>
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#include <boost/asio.hpp>
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#include <boost/asio/ip/resolver_query_base.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <boost/asio/ssl.hpp>
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#include <boost/regex.hpp>
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#include <optional>
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namespace xrpl {
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static std::optional<HTTPClientSSLContext> httpClientSSLContext;
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void
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HTTPClient::initializeSSLContext(
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std::string const& sslVerifyDir,
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std::string const& sslVerifyFile,
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bool sslVerify,
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beast::Journal j)
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{
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httpClientSSLContext.emplace(sslVerifyDir, sslVerifyFile, sslVerify, j);
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}
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void
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HTTPClient::cleanupSSLContext()
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{
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httpClientSSLContext.reset();
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}
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//------------------------------------------------------------------------------
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//
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// Fetch a web page via http or https.
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//
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//------------------------------------------------------------------------------
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class HTTPClientImp : public std::enable_shared_from_this<HTTPClientImp>,
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public HTTPClient
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{
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public:
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HTTPClientImp(
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boost::asio::io_context& io_context,
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unsigned short const port,
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std::size_t maxResponseSize,
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beast::Journal& j)
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: mSocket(io_context, httpClientSSLContext->context())
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, mResolver(io_context)
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, mHeader(maxClientHeaderBytes)
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, mPort(port)
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, maxResponseSize_(maxResponseSize)
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, mDeadline(io_context)
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, j_(j)
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{
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}
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//--------------------------------------------------------------------------
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void
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makeGet(
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std::string const& strPath,
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boost::asio::streambuf& sb,
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std::string const& strHost)
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{
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std::ostream osRequest(&sb);
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osRequest << "GET " << strPath
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<< " HTTP/1.0\r\n"
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"Host: "
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<< strHost
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<< "\r\n"
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"Accept: */*\r\n" // YYY Do we need this line?
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"Connection: close\r\n\r\n";
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}
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//--------------------------------------------------------------------------
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void
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request(
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bool bSSL,
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std::deque<std::string> deqSites,
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std::function<
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void(boost::asio::streambuf& sb, std::string const& strHost)> build,
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std::chrono::seconds timeout,
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std::function<bool(
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boost::system::error_code const& ecResult,
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int iStatus,
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std::string const& strData)> complete)
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{
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mSSL = bSSL;
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mDeqSites = deqSites;
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mBuild = build;
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mComplete = complete;
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mTimeout = timeout;
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httpsNext();
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}
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//--------------------------------------------------------------------------
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void
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get(bool bSSL,
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std::deque<std::string> deqSites,
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std::string const& strPath,
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std::chrono::seconds timeout,
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std::function<bool(
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boost::system::error_code const& ecResult,
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int iStatus,
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std::string const& strData)> complete)
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{
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mComplete = complete;
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mTimeout = timeout;
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request(
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bSSL,
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deqSites,
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std::bind(
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&HTTPClientImp::makeGet,
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shared_from_this(),
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strPath,
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std::placeholders::_1,
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std::placeholders::_2),
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timeout,
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complete);
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}
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//--------------------------------------------------------------------------
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void
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httpsNext()
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{
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JLOG(j_.trace()) << "Fetch: " << mDeqSites[0];
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auto query = std::make_shared<Query>(
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mDeqSites[0],
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std::to_string(mPort),
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boost::asio::ip::resolver_query_base::numeric_service);
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mQuery = query;
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try
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{
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mDeadline.expires_after(mTimeout);
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}
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catch (boost::system::system_error const& e)
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{
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mShutdown = e.code();
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JLOG(j_.trace()) << "expires_after: " << mShutdown.message();
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mDeadline.async_wait(std::bind(
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&HTTPClientImp::handleDeadline,
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shared_from_this(),
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std::placeholders::_1));
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}
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if (!mShutdown)
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{
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JLOG(j_.trace()) << "Resolving: " << mDeqSites[0];
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mResolver.async_resolve(
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mQuery->host,
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mQuery->port,
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mQuery->flags,
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std::bind(
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&HTTPClientImp::handleResolve,
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shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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if (mShutdown)
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invokeComplete(mShutdown);
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}
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void
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handleDeadline(boost::system::error_code const& ecResult)
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{
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if (ecResult == boost::asio::error::operation_aborted)
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{
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// Timer canceled because deadline no longer needed.
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JLOG(j_.trace()) << "Deadline cancelled.";
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// Aborter is done.
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}
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else if (ecResult)
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{
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JLOG(j_.trace()) << "Deadline error: " << mDeqSites[0] << ": "
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<< ecResult.message();
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// Can't do anything sound.
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abort();
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}
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else
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{
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JLOG(j_.trace()) << "Deadline arrived.";
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// Mark us as shutting down.
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// XXX Use our own error code.
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mShutdown = boost::system::error_code{
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boost::system::errc::bad_address,
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boost::system::system_category()};
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// Cancel any resolving.
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mResolver.cancel();
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// Stop the transaction.
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mSocket.async_shutdown(std::bind(
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&HTTPClientImp::handleShutdown,
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shared_from_this(),
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std::placeholders::_1));
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}
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}
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void
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handleShutdown(boost::system::error_code const& ecResult)
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{
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if (ecResult)
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{
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JLOG(j_.trace()) << "Shutdown error: " << mDeqSites[0] << ": "
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<< ecResult.message();
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}
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}
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void
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handleResolve(
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boost::system::error_code const& ecResult,
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boost::asio::ip::tcp::resolver::results_type result)
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{
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if (!mShutdown)
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{
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mShutdown = ecResult ? ecResult
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: httpClientSSLContext->preConnectVerify(
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mSocket.SSLSocket(), mDeqSites[0]);
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}
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if (mShutdown)
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{
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JLOG(j_.trace()) << "Resolve error: " << mDeqSites[0] << ": "
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<< mShutdown.message();
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invokeComplete(mShutdown);
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}
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else
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{
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JLOG(j_.trace()) << "Resolve complete.";
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boost::asio::async_connect(
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mSocket.lowest_layer(),
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result,
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std::bind(
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&HTTPClientImp::handleConnect,
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shared_from_this(),
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std::placeholders::_1));
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}
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}
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void
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handleConnect(boost::system::error_code const& ecResult)
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{
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if (!mShutdown)
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mShutdown = ecResult;
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if (mShutdown)
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{
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JLOG(j_.trace()) << "Connect error: " << mShutdown.message();
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}
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if (!mShutdown)
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{
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JLOG(j_.trace()) << "Connected.";
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mShutdown = httpClientSSLContext->postConnectVerify(
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mSocket.SSLSocket(), mDeqSites[0]);
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if (mShutdown)
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{
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JLOG(j_.trace()) << "postConnectVerify: " << mDeqSites[0]
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<< ": " << mShutdown.message();
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}
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}
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if (mShutdown)
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{
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invokeComplete(mShutdown);
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}
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else if (mSSL)
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{
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mSocket.async_handshake(
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AutoSocket::ssl_socket::client,
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std::bind(
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&HTTPClientImp::handleRequest,
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shared_from_this(),
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std::placeholders::_1));
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}
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else
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{
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handleRequest(ecResult);
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}
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}
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void
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handleRequest(boost::system::error_code const& ecResult)
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{
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if (!mShutdown)
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mShutdown = ecResult;
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if (mShutdown)
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{
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JLOG(j_.trace()) << "Handshake error:" << mShutdown.message();
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invokeComplete(mShutdown);
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}
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else
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{
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JLOG(j_.trace()) << "Session started.";
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mBuild(mRequest, mDeqSites[0]);
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mSocket.async_write(
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mRequest,
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std::bind(
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&HTTPClientImp::handleWrite,
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shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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}
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void
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handleWrite(
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boost::system::error_code const& ecResult,
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std::size_t bytes_transferred)
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{
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if (!mShutdown)
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mShutdown = ecResult;
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if (mShutdown)
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{
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JLOG(j_.trace()) << "Write error: " << mShutdown.message();
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invokeComplete(mShutdown);
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}
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else
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{
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JLOG(j_.trace()) << "Wrote.";
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mSocket.async_read_until(
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mHeader,
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"\r\n\r\n",
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std::bind(
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&HTTPClientImp::handleHeader,
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shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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}
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void
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handleHeader(
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boost::system::error_code const& ecResult,
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std::size_t bytes_transferred)
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{
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std::string strHeader{
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{std::istreambuf_iterator<char>(&mHeader)},
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std::istreambuf_iterator<char>()};
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JLOG(j_.trace()) << "Header: \"" << strHeader << "\"";
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static boost::regex reStatus{
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"\\`HTTP/1\\S+ (\\d{3}) .*\\'"}; // HTTP/1.1 200 OK
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static boost::regex reSize{
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"\\`.*\\r\\nContent-Length:\\s+([0-9]+).*\\'", boost::regex::icase};
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static boost::regex reBody{"\\`.*\\r\\n\\r\\n(.*)\\'"};
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boost::smatch smMatch;
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// Match status code.
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if (!boost::regex_match(strHeader, smMatch, reStatus))
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{
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// XXX Use our own error code.
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JLOG(j_.trace()) << "No status code";
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invokeComplete(boost::system::error_code{
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boost::system::errc::bad_address,
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boost::system::system_category()});
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return;
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}
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mStatus = beast::lexicalCastThrow<int>(std::string(smMatch[1]));
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if (boost::regex_match(strHeader, smMatch, reBody)) // we got some body
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mBody = smMatch[1];
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std::size_t const responseSize = [&] {
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if (boost::regex_match(strHeader, smMatch, reSize))
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return beast::lexicalCast<std::size_t>(
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std::string(smMatch[1]), maxResponseSize_);
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return maxResponseSize_;
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}();
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if (responseSize > maxResponseSize_)
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{
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JLOG(j_.trace()) << "Response field too large";
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invokeComplete(boost::system::error_code{
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boost::system::errc::value_too_large,
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boost::system::system_category()});
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return;
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}
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if (responseSize == 0)
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{
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// no body wanted or available
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invokeComplete(ecResult, mStatus);
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}
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else if (mBody.size() >= responseSize)
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{
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// we got the whole thing
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invokeComplete(ecResult, mStatus, mBody);
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}
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else
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{
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mSocket.async_read(
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mResponse.prepare(responseSize - mBody.size()),
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boost::asio::transfer_all(),
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std::bind(
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&HTTPClientImp::handleData,
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shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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}
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void
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handleData(
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boost::system::error_code const& ecResult,
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std::size_t bytes_transferred)
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{
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if (!mShutdown)
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mShutdown = ecResult;
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if (mShutdown && mShutdown != boost::asio::error::eof)
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{
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JLOG(j_.trace()) << "Read error: " << mShutdown.message();
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invokeComplete(mShutdown);
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}
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else
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{
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if (mShutdown)
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{
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JLOG(j_.trace()) << "Complete.";
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}
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else
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{
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mResponse.commit(bytes_transferred);
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std::string strBody{
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{std::istreambuf_iterator<char>(&mResponse)},
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std::istreambuf_iterator<char>()};
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invokeComplete(ecResult, mStatus, mBody + strBody);
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}
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}
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}
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// Call cancel the deadline timer and invoke the completion routine.
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void
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invokeComplete(
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boost::system::error_code const& ecResult,
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int iStatus = 0,
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std::string const& strData = "")
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{
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boost::system::error_code ecCancel;
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try
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{
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mDeadline.cancel();
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}
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catch (boost::system::system_error const& e)
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{
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JLOG(j_.trace())
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<< "invokeComplete: Deadline cancel error: " << e.what();
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ecCancel = e.code();
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}
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JLOG(j_.debug()) << "invokeComplete: Deadline popping: "
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<< mDeqSites.size();
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if (!mDeqSites.empty())
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{
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mDeqSites.pop_front();
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}
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bool bAgain = true;
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if (mDeqSites.empty() || !ecResult)
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{
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// ecResult: !0 = had an error, last entry
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// iStatus: result, if no error
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// strData: data, if no error
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bAgain = mComplete &&
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mComplete(ecResult ? ecResult : ecCancel, iStatus, strData);
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}
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if (!mDeqSites.empty() && bAgain)
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{
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httpsNext();
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}
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}
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private:
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using pointer = std::shared_ptr<HTTPClient>;
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bool mSSL;
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AutoSocket mSocket;
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boost::asio::ip::tcp::resolver mResolver;
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struct Query
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{
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std::string host;
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std::string port;
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boost::asio::ip::resolver_query_base::flags flags;
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};
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std::shared_ptr<Query> mQuery;
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boost::asio::streambuf mRequest;
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boost::asio::streambuf mHeader;
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boost::asio::streambuf mResponse;
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std::string mBody;
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unsigned short const mPort;
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std::size_t const maxResponseSize_;
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int mStatus;
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std::function<void(boost::asio::streambuf& sb, std::string const& strHost)>
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mBuild;
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std::function<bool(
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boost::system::error_code const& ecResult,
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int iStatus,
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std::string const& strData)>
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mComplete;
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boost::asio::basic_waitable_timer<std::chrono::steady_clock> mDeadline;
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// If not success, we are shutting down.
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boost::system::error_code mShutdown;
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std::deque<std::string> mDeqSites;
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std::chrono::seconds mTimeout;
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beast::Journal j_;
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};
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//------------------------------------------------------------------------------
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void
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HTTPClient::get(
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bool bSSL,
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boost::asio::io_context& io_context,
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std::deque<std::string> deqSites,
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unsigned short const port,
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std::string const& strPath,
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std::size_t responseMax,
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std::chrono::seconds timeout,
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std::function<bool(
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boost::system::error_code const& ecResult,
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int iStatus,
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std::string const& strData)> complete,
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beast::Journal& j)
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{
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auto client =
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std::make_shared<HTTPClientImp>(io_context, port, responseMax, j);
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client->get(bSSL, deqSites, strPath, timeout, complete);
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}
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void
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HTTPClient::get(
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bool bSSL,
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boost::asio::io_context& io_context,
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std::string strSite,
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unsigned short const port,
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std::string const& strPath,
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std::size_t responseMax,
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std::chrono::seconds timeout,
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std::function<bool(
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boost::system::error_code const& ecResult,
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int iStatus,
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std::string const& strData)> complete,
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beast::Journal& j)
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{
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std::deque<std::string> deqSites(1, strSite);
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auto client =
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std::make_shared<HTTPClientImp>(io_context, port, responseMax, j);
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client->get(bSSL, deqSites, strPath, timeout, complete);
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}
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|
|
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void
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|
HTTPClient::request(
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|
bool bSSL,
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|
boost::asio::io_context& io_context,
|
|
std::string strSite,
|
|
unsigned short const port,
|
|
std::function<void(boost::asio::streambuf& sb, std::string const& strHost)>
|
|
setRequest,
|
|
std::size_t responseMax,
|
|
std::chrono::seconds timeout,
|
|
std::function<bool(
|
|
boost::system::error_code const& ecResult,
|
|
int iStatus,
|
|
std::string const& strData)> complete,
|
|
beast::Journal& j)
|
|
{
|
|
std::deque<std::string> deqSites(1, strSite);
|
|
|
|
auto client =
|
|
std::make_shared<HTTPClientImp>(io_context, port, responseMax, j);
|
|
client->request(bSSL, deqSites, setRequest, timeout, complete);
|
|
}
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|
|
|
} // namespace xrpl
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