X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Frgw%2Frgw_asio_client.cc;fp=src%2Fceph%2Fsrc%2Frgw%2Frgw_asio_client.cc;h=63de2d27e757802aed3856f2badedd6d27107868;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/rgw/rgw_asio_client.cc b/src/ceph/src/rgw/rgw_asio_client.cc
new file mode 100644
index 0000000..63de2d2
--- /dev/null
+++ b/src/ceph/src/rgw/rgw_asio_client.cc
@@ -0,0 +1,218 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/asio/write.hpp>
+#include <beast/http/read.hpp>
+
+#include "rgw_asio_client.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rgw
+
+#undef dout_prefix
+#define dout_prefix (*_dout << "asio: ")
+
+using namespace rgw::asio;
+
+ClientIO::ClientIO(tcp::socket& socket,
+                   parser_type& parser,
+                   beast::flat_streambuf& buffer)
+  : socket(socket), parser(parser), buffer(buffer), txbuf(*this)
+{
+}
+
+ClientIO::~ClientIO() = default;
+
+void ClientIO::init_env(CephContext *cct)
+{
+  env.init(cct);
+
+  const auto& request = parser.get();
+  const auto& headers = request.fields;
+  for (auto header = headers.begin(); header != headers.end(); ++header) {
+    const auto& name = header->name();
+    const auto& value = header->value();
+
+    if (boost::algorithm::iequals(name, "content-length")) {
+      env.set("CONTENT_LENGTH", value);
+      continue;
+    }
+    if (boost::algorithm::iequals(name, "content-type")) {
+      env.set("CONTENT_TYPE", value);
+      continue;
+    }
+    if (boost::algorithm::iequals(name, "connection")) {
+      conn_keepalive = boost::algorithm::iequals(value, "keep-alive");
+      conn_close = boost::algorithm::iequals(value, "close");
+    }
+
+    static const boost::string_ref HTTP_{"HTTP_"};
+
+    char buf[name.size() + HTTP_.size() + 1];
+    auto dest = std::copy(std::begin(HTTP_), std::end(HTTP_), buf);
+    for (auto src = name.begin(); src != name.end(); ++src, ++dest) {
+      if (*src == '-') {
+        *dest = '_';
+      } else {
+        *dest = std::toupper(*src);
+      }
+    }
+    *dest = '\0';
+
+    env.set(buf, value);
+  }
+
+  env.set("REQUEST_METHOD", request.method);
+
+  // split uri from query
+  auto url = boost::string_ref{request.url};
+  auto pos = url.find('?');
+  auto query = url.substr(pos + 1);
+  url = url.substr(0, pos);
+
+  env.set("REQUEST_URI", url);
+  env.set("QUERY_STRING", query);
+  env.set("SCRIPT_URI", url); /* FIXME */
+
+  char port_buf[16];
+  snprintf(port_buf, sizeof(port_buf), "%d", socket.local_endpoint().port());
+  env.set("SERVER_PORT", port_buf);
+  // TODO: set SERVER_PORT_SECURE if using ssl
+  // TODO: set REMOTE_USER if authenticated
+}
+
+size_t ClientIO::write_data(const char* buf, size_t len)
+{
+  boost::system::error_code ec;
+  auto bytes = boost::asio::write(socket, boost::asio::buffer(buf, len), ec);
+  if (ec) {
+    derr << "write_data failed: " << ec.message() << dendl;
+    throw rgw::io::Exception(ec.value(), std::system_category());
+  }
+  /* According to the documentation of boost::asio::write if there is
+   * no error (signalised by ec), then bytes == len. We don't need to
+   * take care of partial writes in such situation. */
+  return bytes;
+}
+
+size_t ClientIO::read_data(char* buf, size_t max)
+{
+  auto& message = parser.get();
+  auto& body_remaining = message.body;
+  body_remaining = boost::asio::mutable_buffer{buf, max};
+
+  boost::system::error_code ec;
+
+  dout(30) << this << " read_data for " << max << " with "
+      << buffer.size() << " bytes buffered" << dendl;
+
+  while (boost::asio::buffer_size(body_remaining) && !parser.is_complete()) {
+    auto bytes = beast::http::read_some(socket, buffer, parser, ec);
+    buffer.consume(bytes);
+    if (ec == boost::asio::error::connection_reset ||
+        ec == boost::asio::error::eof ||
+        ec == beast::http::error::partial_message) {
+      break;
+    }
+    if (ec) {
+      derr << "failed to read body: " << ec.message() << dendl;
+      throw rgw::io::Exception(ec.value(), std::system_category());
+    }
+  }
+  return max - boost::asio::buffer_size(body_remaining);
+}
+
+size_t ClientIO::complete_request()
+{
+  return 0;
+}
+
+void ClientIO::flush()
+{
+  txbuf.pubsync();
+}
+
+size_t ClientIO::send_status(int status, const char* status_name)
+{
+  static constexpr size_t STATUS_BUF_SIZE = 128;
+
+  char statusbuf[STATUS_BUF_SIZE];
+  const auto statuslen = snprintf(statusbuf, sizeof(statusbuf),
+                                  "HTTP/1.1 %d %s\r\n", status, status_name);
+
+  return txbuf.sputn(statusbuf, statuslen);
+}
+
+size_t ClientIO::send_100_continue()
+{
+  const char HTTTP_100_CONTINUE[] = "HTTP/1.1 100 CONTINUE\r\n\r\n";
+  const size_t sent = txbuf.sputn(HTTTP_100_CONTINUE,
+                                  sizeof(HTTTP_100_CONTINUE) - 1);
+  flush();
+  return sent;
+}
+
+static constexpr size_t TIME_BUF_SIZE = 128;
+static size_t dump_date_header(char (&timestr)[TIME_BUF_SIZE])
+{
+  const time_t gtime = time(nullptr);
+  struct tm result;
+  struct tm const * const tmp = gmtime_r(&gtime, &result);
+  if (tmp == nullptr) {
+    return 0;
+  }
+  return strftime(timestr, sizeof(timestr),
+                  "Date: %a, %d %b %Y %H:%M:%S %Z\r\n", tmp);
+}
+
+size_t ClientIO::complete_header()
+{
+  size_t sent = 0;
+
+  char timestr[TIME_BUF_SIZE];
+  if (dump_date_header(timestr)) {
+    sent += txbuf.sputn(timestr, strlen(timestr));
+  }
+
+  if (conn_keepalive) {
+    constexpr char CONN_KEEP_ALIVE[] = "Connection: Keep-Alive\r\n";
+    sent += txbuf.sputn(CONN_KEEP_ALIVE, sizeof(CONN_KEEP_ALIVE) - 1);
+  } else if (conn_close) {
+    constexpr char CONN_KEEP_CLOSE[] = "Connection: close\r\n";
+    sent += txbuf.sputn(CONN_KEEP_CLOSE, sizeof(CONN_KEEP_CLOSE) - 1);
+  }
+
+  constexpr char HEADER_END[] = "\r\n";
+  sent += txbuf.sputn(HEADER_END, sizeof(HEADER_END) - 1);
+
+  flush();
+  return sent;
+}
+
+size_t ClientIO::send_header(const boost::string_ref& name,
+                             const boost::string_ref& value)
+{
+  static constexpr char HEADER_SEP[] = ": ";
+  static constexpr char HEADER_END[] = "\r\n";
+
+  size_t sent = 0;
+
+  sent += txbuf.sputn(name.data(), name.length());
+  sent += txbuf.sputn(HEADER_SEP, sizeof(HEADER_SEP) - 1);
+  sent += txbuf.sputn(value.data(), value.length());
+  sent += txbuf.sputn(HEADER_END, sizeof(HEADER_END) - 1);
+
+  return sent;
+}
+
+size_t ClientIO::send_content_length(uint64_t len)
+{
+  static constexpr size_t CONLEN_BUF_SIZE = 128;
+
+  char sizebuf[CONLEN_BUF_SIZE];
+  const auto sizelen = snprintf(sizebuf, sizeof(sizebuf),
+                                "Content-Length: %" PRIu64 "\r\n", len);
+
+  return txbuf.sputn(sizebuf, sizelen);
+}