From aff304f6ae6592908e05c95ee13146d2cf143df9 Mon Sep 17 00:00:00 2001
From: Cedric RICARD <cedric.ricard@calexium.com>
Date: Wed, 5 Dec 2007 22:25:09 +0000
Subject: [PATCH] small optimization on reading HTTP headers

---
 calexium_lib/web/CXM_multihost_http_server.anubis | 80 ++++++++++++++++++++++++++++++++++++++------------------------------------------
 1 file changed, 38 insertions(+), 42 deletions(-)

diff --git a/calexium_lib/web/CXM_multihost_http_server.anubis b/calexium_lib/web/CXM_multihost_http_server.anubis
index d88ecfb..5f997fa 100644
--- a/calexium_lib/web/CXM_multihost_http_server.anubis
+++ b/calexium_lib/web/CXM_multihost_http_server.anubis
@@ -733,13 +733,13 @@ define String
   "[" + virtual_machine_id + "] ".
 
 define ReadResult
-   read
+   read_from_connexion
      (
        BufferedConnection   connection,
        Int32                size,
        Int32                time_out
      ) =
-  //println(pid + "read(" + size + ")"); 
+  //println(pid + "read_from_connexion(" + size + ")"); 
 
   if *connection.read_pos < length(*connection.buffer) then
     //println(pid + "  reading from buffer (size = " + length(*connection.buffer) + ", pos = " + *connection.read_pos);
@@ -751,7 +751,7 @@ define ReadResult
     if size > size_read
       then 
         //println("Wanted " + size + ", read only " + size_read);
-        if read(connection, size - size_read, time_out) is
+        if read_from_connexion(connection, size - size_read, time_out) is
         {
           error   then error,
           timeout then ok(result),
@@ -769,41 +769,9 @@ define ReadResult
         connection.buffer <- ba;
         connection.read_pos <- 0;
         //println(pid + "rb = " + length(*read_buffer)); 
-        read(connection, size, time_out)
+        read_from_connexion(connection, size, time_out)
     }.
 
-   
-define Result(Error,Word8)
-   read_one_byte
-     (
-       BufferedConnection      connection,
-       Int32                   dead_line,
-       DenialOfService         dos
-     ) =
-   //if now > dead_line then record_dubious_connection(connection,dead_line,dos) else
-   if nth(*connection.read_pos, *connection.buffer) is
-   {
-      failure then
-        if read(connection,1,600) is // the connection is closed after 10 minutes of inactivity
-         {
-           error   then error(cannot_read_from_connection),
-           timeout then error(timeout(600)),
-                             //record_dubious_connection(connection,dead_line,dos), 
-           ok(ba)  then if nth(0,ba) is 
-             {
-               failure then error(cannot_read_from_connection),
-               success(c) then 
-      //             println("-" + pid + "read [" + implode([c]) + "]\t");
-                 ok(c)
-             }
-         },
-      success(c) then 
-        connection.read_pos <- *connection.read_pos + 1;
-        ok(c)
-   }.
-
-
-   
 define Result(Error,Word8)
    next_char        // reading a character (check the list first, and read on the connection
                     //   only when the list is empty). 
@@ -812,10 +780,38 @@ define Result(Error,Word8)
        Int32                   dead_line,
        DenialOfService         dos
      ) =
-   with t2_tmp = (UTime) now,
+   //with t2_tmp = (UTime) now,
    if *unput_chars is 
      {
-       [ ] then with ret = read_one_byte(connection,dead_line,dos), accumulate_t2(t2_tmp); ret,
+       [ ] then 
+          // ///////////////////
+          // Buffered reading 
+           //if now > dead_line then record_dubious_connection(connection,dead_line,dos) else
+           if nth(*connection.read_pos, *connection.buffer) is
+           {
+              failure then
+                if read_from_connexion(connection,1,600) is // the connection is closed after 10 minutes of inactivity
+                 {
+                   error   then /*accumulate_t2(t2_tmp);*/ error(cannot_read_from_connection),
+                   timeout then /*accumulate_t2(t2_tmp);*/ error(timeout(600)),
+                                     //record_dubious_connection(connection,dead_line,dos), 
+                   ok(ba)  then if nth(0,ba) is 
+                     {
+                       failure then /*accumulate_t2(t2_tmp);*/ error(cannot_read_from_connection),
+                       success(c) then 
+                         //println("-" + pid + "read [" + implode([c]) + "]\t");
+                         //accumulate_t2(t2_tmp); 
+                         ok(c)
+                     }
+                 },
+              success(c) then 
+                connection.read_pos <- *connection.read_pos + 1;
+                //accumulate_t2(t2_tmp); 
+                ok(c)
+           },
+          
+          // ///////////////////
+          // standard reading
 //          if read(connection.conn, 1, 600) is // the connection is closed after 10 minutes of inactivity
 //          {
 //            error   then accumulate_t2(t2_tmp); println(pid + "read failed)"); error(cannot_read_from_connection),
@@ -829,7 +825,7 @@ define Result(Error,Word8)
 //           },
    
        [h . t] then 
-         unput_chars <- t; accumulate_t2(t2_tmp); 
+         unput_chars <- t; //accumulate_t2(t2_tmp); 
          ok(h)
      }. 
    
@@ -1722,7 +1718,7 @@ define Result(Error,ByteArray)
      ) =
    if body_size = 0 then ok(constant_byte_array(0,0)) else
    if retries =< 0 then error(cannot_read_from_connection) else
-   if read(connection,body_size,60) is 
+   if read_from_connexion(connection,body_size,60) is 
      {
        error    then error(cannot_read_from_connection),
        timeout  then error(timeout(60)),
@@ -3002,9 +2998,9 @@ define One
                    send_answer(host_name, desc,connection.conn, request_line, headers, body,
                                 make_generate_trust_ticket(dos));
   with duration = (UTime) now - *t0,
-  println("Request duration: " + utime_to_string(duration));
+  println("Request duration: " + utime_to_string(duration))
   //println("BufferRead duration: " + utime_to_string(*t1));
-  println("next_char duration: " + utime_to_string(*t2))
+  //println("next_char duration: " + utime_to_string(*t2))
                  }
              }
          }
--
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