From: Radoslaw Zarzynski <rzarzynski@mirantis.com>
Date: Wed, 3 Aug 2016 16:42:30 +0000 (+0200)
Subject: rgw: port the ASIO frontend to the new RGWStreamIOEngine infrastructure.
X-Git-Tag: v11.1.0~454^2~42
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=2825cc7c614483dcf42eb920bfe35ae26428344e;p=ceph.git

rgw: port the ASIO frontend to the new RGWStreamIOEngine infrastructure.

Signed-off-by: Radoslaw Zarzynski <rzarzynski@mirantis.com>
---

diff --git a/src/rgw/rgw_asio_client.cc b/src/rgw/rgw_asio_client.cc
index 8b584799a74f..679b3078aef5 100644
--- a/src/rgw/rgw_asio_client.cc
+++ b/src/rgw/rgw_asio_client.cc
@@ -12,8 +12,10 @@
 #define dout_prefix (*_dout << "asio: ")
 
 
-RGWAsioClientIO::RGWAsioClientIO(tcp::socket&& socket, request_type&& request)
-  : socket(std::move(socket)), request(std::move(request))
+RGWAsioClientIO::RGWAsioClientIO(tcp::socket&& socket,
+                                 request_type&& request)
+  : socket(std::move(socket)),
+    request(std::move(request))
 {}
 
 RGWAsioClientIO::~RGWAsioClientIO() = default;
@@ -76,7 +78,7 @@ void RGWAsioClientIO::init_env(CephContext *cct)
   // TODO: set REMOTE_USER if authenticated
 }
 
-int RGWAsioClientIO::write_data(const char *buf, int len)
+int RGWAsioClientIO::write_data(const char* const buf, const int len)
 {
   boost::system::error_code ec;
   auto bytes = boost::asio::write(socket, boost::asio::buffer(buf, len), ec);
@@ -87,7 +89,7 @@ int RGWAsioClientIO::write_data(const char *buf, int len)
   return bytes;
 }
 
-int RGWAsioClientIO::read_data(char *buf, int max)
+int RGWAsioClientIO::read_data(char* const buf, const int max)
 {
   // read data from the body's bufferlist
   auto bytes = std::min<unsigned>(max, body_iter.get_remaining());
@@ -102,46 +104,68 @@ int RGWAsioClientIO::complete_request()
 
 void RGWAsioClientIO::flush()
 {
+  return;
 }
 
-int RGWAsioClientIO::send_status(int status, const char *status_name)
+int RGWAsioClientIO::send_status(const int status,
+                                 const char* const status_name)
 {
-  return print("HTTP/1.1 %d %s\r\n", status, 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 write_data(statusbuf, statuslen);
 }
 
 int RGWAsioClientIO::send_100_continue()
 {
-  return print("HTTP/1.1 100 CONTINUE\r\n\r\n");
+  const char HTTTP_100_CONTINUE[] = "HTTP/1.1 100 CONTINUE\r\n\r\n";
+  return write_data(HTTTP_100_CONTINUE, sizeof(HTTTP_100_CONTINUE) - 1);
 }
 
 static constexpr size_t TIME_BUF_SIZE = 128;
-static int dump_date_header(char *timestr, size_t size)
+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)
+  if (tmp == nullptr) {
     return 0;
-  return strftime(timestr, size, "Date: %a, %d %b %Y %H:%M:%S %Z\r\n", tmp);
+  }
+  return strftime(timestr, sizeof(timestr),
+                  "Date: %a, %d %b %Y %H:%M:%S %Z\r\n", tmp);
 }
 
 int RGWAsioClientIO::complete_header()
 {
+  size_t sent = 0;
+
   char timestr[TIME_BUF_SIZE];
-  if (dump_date_header(timestr, sizeof(timestr))) {
-    print(timestr);
+  if (dump_date_header(timestr)) {
+    sent += write_data(timestr, strlen(timestr));
   }
 
   if (conn_keepalive) {
-    print("Connection: Keep-Alive\r\n");
+    constexpr char CONN_KEEP_ALIVE[] = "Connection: Keep-Alive\r\n";
+    sent += write_data(CONN_KEEP_ALIVE, sizeof(CONN_KEEP_ALIVE) - 1);
   } else if (conn_close) {
-    print("Connection: close\r\n");
+    constexpr char CONN_KEEP_CLOSE[] = "Connection: close\r\n";
+    sent += write_data(CONN_KEEP_CLOSE, sizeof(CONN_KEEP_CLOSE) - 1);
   }
-  print("\r\n");
-  return 0;
+
+  constexpr char HEADER_END[] = "\r\n";
+  return sent + write_data(HEADER_END, sizeof(HEADER_END) - 1);
 }
 
-int RGWAsioClientIO::send_content_length(uint64_t len)
+int RGWAsioClientIO::send_content_length(const uint64_t len)
 {
-  return print("Content-Length: %" PRIu64 "\r\n", 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 write_data(sizebuf, sizelen);
 }
diff --git a/src/rgw/rgw_asio_client.h b/src/rgw/rgw_asio_client.h
index d6426b78a473..11ae0443d4fe 100644
--- a/src/rgw/rgw_asio_client.h
+++ b/src/rgw/rgw_asio_client.h
@@ -24,7 +24,7 @@ class RGWBufferlistBody {
                                             Headers>;
 };
 
-class RGWAsioClientIO : public RGWStreamIO {
+class RGWAsioClientIO : public RGWStreamIOEngine {
   using tcp = boost::asio::ip::tcp;
   tcp::socket socket;
 
@@ -36,6 +36,7 @@ class RGWAsioClientIO : public RGWStreamIO {
 
   bool conn_keepalive{false};
   bool conn_close{false};
+  RGWEnv env;
 
   void init_env(CephContext *cct) override;
   int write_data(const char *buf, int len) override;
@@ -51,6 +52,10 @@ class RGWAsioClientIO : public RGWStreamIO {
   int send_100_continue() override;
   int complete_header() override;
   int send_content_length(uint64_t len) override;
+
+  RGWEnv& get_env() override {
+    return env;
+  }
 };
 
 // used by beast::http::read() to read the body into a bufferlist
diff --git a/src/rgw/rgw_asio_frontend.cc b/src/rgw/rgw_asio_frontend.cc
index a89ec7711dad..6d7b1b12699a 100644
--- a/src/rgw/rgw_asio_frontend.cc
+++ b/src/rgw/rgw_asio_frontend.cc
@@ -92,7 +92,8 @@ class AsioConnection : public std::enable_shared_from_this<AsioConnection> {
       return;
     }
     RGWRequest req{env.store->get_new_req_id()};
-    RGWAsioClientIO client{std::move(socket), std::move(request)};
+    RGWAsioClientIO real_client{std::move(socket), std::move(request)};
+    RGWStreamIOLegacyWrapper client(&real_client);
     process_request(env.store, env.rest, &req, &client, env.olog);
   }