476 lines
12 KiB
C++
476 lines
12 KiB
C++
#include <graphene/peerplays_sidechain/common/rpc_client.hpp>
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#include <sstream>
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#include <string>
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//#include <boost/asio.hpp>
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//#include <boost/asio/ssl.hpp>
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#include <boost/asio/buffer.hpp>
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#include <boost/property_tree/json_parser.hpp>
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#include <boost/property_tree/ptree.hpp>
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#include <curl/curl.h>
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#include <fc/crypto/base64.hpp>
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#include <fc/log/logger.hpp>
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#include <fc/network/ip.hpp>
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#include <boost/algorithm/string/case_conv.hpp>
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#include <boost/algorithm/string/trim.hpp>
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namespace graphene { namespace peerplays_sidechain {
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using namespace boost::asio;
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namespace detail {
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// https_call_impl
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class https_call_impl {
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public:
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https_call_impl(https_call &call, const void *body_data, size_t body_size, http_response &response);
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void exec();
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private:
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https_call &m_call;
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const void *m_body_data;
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size_t m_body_size;
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http_response &m_response;
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ssl::stream<ip::tcp::socket> m_socket;
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streambuf m_response_buf;
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int32_t m_content_length;
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private:
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void connect();
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void send_request();
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void process_headers();
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void process_response();
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};
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static const char cr = 0x0D;
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static const char lf = 0x0A;
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static const char *crlf = "\x0D\x0A";
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static const char *crlfcrlf = "\x0D\x0A\x0D\x0A";
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https_call_impl::https_call_impl(https_call &call, const void *body_data, size_t body_size, http_response &response) :
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m_call(call),
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m_body_data(body_data),
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m_body_size(body_size),
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m_response(response),
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m_socket(m_call.m_service, m_call.m_context),
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m_response_buf(https_call::response_size_limit_bytes) {
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}
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void https_call_impl::exec() {
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connect();
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send_request();
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process_response();
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}
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void https_call_impl::connect() {
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// TCP connect
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m_socket.lowest_layer().connect(m_call.m_endpoint);
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// SSL connect
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if (!SSL_set_tlsext_host_name(m_socket.native_handle(), m_call.m_host.c_str())) {
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FC_THROW("SSL_set_tlsext_host_name failed");
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}
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m_socket.set_verify_mode(ssl::verify_peer);
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m_socket.handshake(ssl::stream_base::client);
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}
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void https_call_impl::send_request() {
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streambuf request;
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std::ostream stream(&request);
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// start string: <method> <path> HTTP/1.0
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stream << m_call.m_method << " " << m_call.m_path << " HTTP/1.0" << crlf;
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// host
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stream << "Host: " << m_call.m_host << ":" << m_call.m_endpoint.port() << crlf;
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// content
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if (m_body_size) {
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stream << "Content-Type: " << m_call.m_content_type << crlf;
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stream << "Content-Length: " << m_body_size << crlf;
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}
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// additional headers
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const auto &h = m_call.m_headers;
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if (!h.empty()) {
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if (h.size() < 2) {
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FC_THROW("invalid headers data");
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}
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stream << h;
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// ensure headers finished correctly
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if ((h.substr(h.size() - 2) != crlf))
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stream << crlf;
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}
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// other
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// stream << "Accept: *\x2F*" << crlf;
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stream << "Accept: text/html, application/json" << crlf;
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stream << "Connection: close" << crlf;
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// end
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stream << crlf;
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// send headers
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write(m_socket, request);
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// send body
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if (m_body_size)
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write(m_socket, buffer(m_body_data, m_body_size));
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}
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void https_call_impl::process_headers() {
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std::istream stream(&m_response_buf);
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std::string http_version;
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stream >> http_version;
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stream >> m_response.status_code;
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boost::algorithm::trim(http_version);
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boost::algorithm::to_lower(http_version);
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if (!stream || http_version.substr(0, 5) != "http/") {
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FC_THROW("invalid response data");
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}
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// read/skip headers
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m_content_length = -1;
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for (;;) {
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std::string header;
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if (!std::getline(stream, header, lf) || (header.size() == 1 && header[0] == cr))
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break;
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if (m_content_length) // if content length is already known
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continue; // continue skipping headers
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auto pos = header.find(':');
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if (pos == std::string::npos)
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continue;
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auto name = header.substr(0, pos);
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boost::algorithm::trim(name);
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boost::algorithm::to_lower(name);
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if (name != "content-length")
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continue;
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auto value = header.substr(pos + 1);
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boost::algorithm::trim(value);
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m_content_length = std::stol(value);
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}
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}
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void https_call_impl::process_response() {
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auto &socket = m_socket;
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auto &buf = m_response_buf;
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auto &content_length = m_content_length;
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auto &body = m_response.body;
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read_until(socket, buf, crlfcrlf);
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process_headers();
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// check content length
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if (content_length >= 0) {
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if (content_length < 2) { // minimum content is "{}"
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FC_THROW("invalid response body (too short)");
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}
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if (content_length > https_call::response_size_limit_bytes) {
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FC_THROW("response body size limit exceeded");
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}
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}
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boost::system::error_code ec;
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for (;;) {
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auto readed = read(socket, buf, transfer_at_least(1), ec);
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if (ec)
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break;
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if (!readed) {
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if (buf.size() == buf.max_size())
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FC_THROW("response body size limit exceeded");
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else
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FC_THROW("logic error: read failed but no error conditon");
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}
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if (content_length >= 0) {
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if (buf.size() > content_length) {
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FC_THROW("read more than content-length");
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}
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}
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}
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{
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boost::system::error_code ec;
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socket.shutdown(ec);
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}
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if ((ec != error::eof) &&
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(ec != ssl::error::stream_truncated)) {
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throw boost::system::system_error(ec);
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}
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if (content_length >= 0) {
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if (buf.size() != content_length) {
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FC_THROW("actual body size differs from content-length");
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}
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}
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auto size = buf.size();
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body.resize(size);
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if (size != buf.sgetn(&body[0], size)) {
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FC_THROW("stream read failed");
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}
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}
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} // namespace detail
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// https_call
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https_call::https_call(const std::string &host, const std::string &ip_addr, uint16_t port, const std::string &method, const std::string &path, const std::string &headers, const std::string &content_type) :
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m_host(host),
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m_method(method),
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m_path(path),
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m_headers(headers),
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m_content_type(content_type),
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m_service(),
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m_context(ssl::context::tlsv12_client),
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m_endpoint(ip::address::from_string(ip_addr), port) {
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m_context.set_default_verify_paths();
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m_context.set_options(ssl::context::default_workarounds);
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}
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bool https_call::exec(const void *body_data, size_t body_size, http_response *response) {
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//ASSERT(response);
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auto &resp = *response;
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detail::https_call_impl impl(*this, body_data, body_size, resp);
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m_error_what = decltype(m_error_what)();
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try {
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try {
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resp.clear();
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impl.exec();
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} catch (const std::exception &e) {
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resp.clear();
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m_error_what = e.what();
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return false;
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}
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} catch (...) {
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resp.clear();
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m_error_what = "unknown exception";
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return false;
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}
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return true;
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}
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}} // namespace graphene::peerplays_sidechain
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namespace graphene { namespace peerplays_sidechain {
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static std::string resolve_host_addr(const std::string &host_name) {
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using namespace boost::asio;
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io_service service;
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ip::tcp::resolver resolver(service);
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auto query = ip::tcp::resolver::query(host_name, std::string());
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auto iter = resolver.resolve(query);
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auto endpoint = *iter;
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auto addr = ((ip::tcp::endpoint)endpoint).address();
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return addr.to_string();
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}
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static std::string strip_proto_name(const std::string &url, std::string *schema) {
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auto index = url.find("://");
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if (index == std::string::npos) {
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if (schema)
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schema->clear();
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return url;
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}
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if (schema)
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schema->assign(&url[0], &url[index]);
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return url.substr(index + 3);
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}
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}} // namespace graphene::peerplays_sidechain
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namespace graphene { namespace peerplays_sidechain {
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rpc_client::rpc_client(std::string url, uint32_t _port, std::string _user, std::string _password, bool _debug_rpc_calls) :
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port(_port),
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user(_user),
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password(_password),
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debug_rpc_calls(_debug_rpc_calls),
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request_id(0) {
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authorization.key = "Authorization";
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authorization.val = "Basic " + fc::base64_encode(user + ":" + password);
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std::string schema;
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host = strip_proto_name(url, &schema);
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boost::algorithm::to_lower(schema);
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try {
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fc::ip::address(host); // try to convert host string to valid IPv4 address
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ip = host;
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} catch (...) {
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try {
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ip = resolve_host_addr(host);
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fc::ip::address(ip);
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} catch (...) {
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elog("Failed to resolve Hive node address ${ip}", ("ip", url));
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FC_ASSERT(false);
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}
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}
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if (schema == "https")
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https = new https_call(host, ip, port, "POST", "/", authorization.key + ":" + authorization.val, "application/json");
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else
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https = 0;
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}
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std::string rpc_client::retrieve_array_value_from_reply(std::string reply_str, std::string array_path, uint32_t idx) {
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std::stringstream ss(reply_str);
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boost::property_tree::ptree json;
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boost::property_tree::read_json(ss, json);
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if (json.find("result") == json.not_found()) {
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return "";
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}
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auto json_result = json.get_child("result");
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if (json_result.find(array_path) == json_result.not_found()) {
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return "";
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}
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boost::property_tree::ptree array_ptree = json_result;
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if (!array_path.empty()) {
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array_ptree = json_result.get_child(array_path);
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}
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uint32_t array_el_idx = -1;
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for (const auto &array_el : array_ptree) {
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array_el_idx = array_el_idx + 1;
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if (array_el_idx == idx) {
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std::stringstream ss_res;
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boost::property_tree::json_parser::write_json(ss_res, array_el.second);
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return ss_res.str();
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}
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}
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return "";
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}
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std::string rpc_client::retrieve_value_from_reply(std::string reply_str, std::string value_path) {
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std::stringstream ss(reply_str);
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boost::property_tree::ptree json;
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boost::property_tree::read_json(ss, json);
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if (json.find("result") == json.not_found()) {
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return "";
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}
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auto json_result = json.get_child("result");
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if (json_result.find(value_path) == json_result.not_found()) {
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return "";
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}
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return json_result.get<std::string>(value_path);
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}
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std::string rpc_client::send_post_request(std::string method, std::string params, bool show_log) {
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std::stringstream body;
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request_id = request_id + 1;
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body << "{ \"jsonrpc\": \"2.0\", \"id\": " << request_id << ", \"method\": \"" << method << "\"";
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if (!params.empty()) {
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body << ", \"params\": " << params;
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}
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body << " }";
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const auto reply = send_post_request(body.str(), show_log);
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if (reply.body.empty()) {
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wlog("RPC call ${function} failed", ("function", __FUNCTION__));
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return "";
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}
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std::stringstream ss(std::string(reply.body.begin(), reply.body.end()));
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boost::property_tree::ptree json;
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boost::property_tree::read_json(ss, json);
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if (reply.status_code == 200) {
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return ss.str();
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}
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if (json.count("error") && !json.get_child("error").empty()) {
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wlog("RPC call ${function} with body ${body} failed with reply '${msg}'", ("function", __FUNCTION__)("body", body.str())("msg", ss.str()));
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}
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return "";
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}
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http_response rpc_client::send_post_request(std::string body, bool show_log) {
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http_response response;
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if (https) {
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https->exec(body.c_str(), body.size(), &response);
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} else {
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std::string url = "http://" + host + ":" + std::to_string(port);
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fc::ip::address addr(ip);
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try {
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fc::http::connection conn;
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conn.connect_to(fc::ip::endpoint(addr, port));
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//if (wallet.length() > 0) {
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// url = url + "/wallet/" + wallet;
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//}
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auto r = conn.request("POST", url, body, fc::http::headers{authorization});
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response.status_code = r.status;
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response.body.assign(r.body.begin(), r.body.end());
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} catch (...) {
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}
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}
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if (show_log) {
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std::string url = host + ":" + std::to_string(port);
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ilog("### Request URL: ${url}", ("url", url));
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ilog("### Request: ${body}", ("body", body));
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std::stringstream ss(std::string(response.body.begin(), response.body.end()));
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ilog("### Response: ${ss}", ("ss", ss.str()));
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}
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return response;
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}
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}} // namespace graphene::peerplays_sidechain
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