Diff: services/http/server/HTTPRequestHandler.cpp

Revision:

0:ac1725ba162c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/http/server/HTTPRequestHandler.cpp	Tue Nov 09 20:54:15 2010 +0000
@@ -0,0 +1,237 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "core/netservice.h"
+#include "HTTPRequestHandler.h"
+
+#include <string.h>
+
+//#define __DEBUG
+#include "dbg/dbg.h"
+
+#define HTTP_REQUEST_TIMEOUT 5000
+
+HTTPRequestHandler::HTTPRequestHandler(const char* rootPath, const char* path, TCPSocket* pTCPSocket) : NetService(), 
+m_pTCPSocket(pTCPSocket), m_reqHeaders(), m_respHeaders(),
+m_rootPath(rootPath), m_path(path), m_errc(200),
+m_watchdog(), m_timeout(0), m_closed(false), m_headersSent(false) //OK
+{
+  //Read & parse headers
+  readHeaders();
+  m_pTCPSocket->setOnEvent(this, &HTTPRequestHandler::onTCPSocketEvent);
+  setTimeout(HTTP_REQUEST_TIMEOUT);
+}
+
+HTTPRequestHandler::~HTTPRequestHandler()
+{
+  close();
+}
+
+void HTTPRequestHandler::onTimeout() //Connection has timed out
+{
+  close();
+}
+
+void HTTPRequestHandler::close() //Close socket and destroy data
+{
+  if(m_closed)
+    return;
+  m_closed = true; //Prevent recursive calling or calling on an object being destructed by someone else
+  m_watchdog.detach();
+  onClose();
+  m_pTCPSocket->resetOnEvent();
+  m_pTCPSocket->close();
+  delete m_pTCPSocket; //Can safely destroy socket
+  NetService::close();
+}
+
+map<string, string>& HTTPRequestHandler::reqHeaders() //const
+{
+  return m_reqHeaders;
+}
+
+string& HTTPRequestHandler::path() //const
+{
+  return m_path;
+}
+
+int HTTPRequestHandler::dataLen() const
+{
+  map<string,string>::iterator it;
+  it = m_reqHeaders.find("Content-Length");
+  if( it == m_reqHeaders.end() )
+  {
+    return 0;
+  }
+  return atoi((*it).second.c_str()); //return 0 if parse fails, so that's fine
+}
+
+int HTTPRequestHandler::readData(char* buf, int len)
+{
+  return m_pTCPSocket->recv(buf, len);
+}
+
+string& HTTPRequestHandler::rootPath() //const
+{
+  return m_rootPath;
+}
+
+void HTTPRequestHandler::setErrCode(int errc)
+{
+  m_errc = errc;
+}
+
+void HTTPRequestHandler::setContentLen(int len)
+{
+  char len_str[6] = {0};
+  sprintf(len_str, "%d", len);
+  respHeaders()["Content-Length"] = len_str;
+}
+  
+map<string, string>& HTTPRequestHandler::respHeaders()
+{
+  return m_respHeaders;
+}
+
+int HTTPRequestHandler::writeData(const char* buf, int len)
+{
+  if(!m_headersSent)
+  {
+    m_headersSent = true;
+    writeHeaders();
+  }
+  
+  return m_pTCPSocket->send(buf, len);
+}
+
+void HTTPRequestHandler::setTimeout(int ms)
+{
+  m_timeout = 1000*ms;
+  resetTimeout();
+}
+
+void HTTPRequestHandler::resetTimeout()
+{
+  m_watchdog.detach();
+  m_watchdog.attach_us<HTTPRequestHandler>(this, &HTTPRequestHandler::onTimeout, m_timeout);
+}
+
+
+void HTTPRequestHandler::readHeaders()
+{
+  static char line[128];
+  static char key[128];
+  static char value[128];
+  while( readLine(line, 128) > 0) //if == 0, it is an empty line = end of headers
+  {
+    int n = sscanf(line, "%[^:]: %[^\n]", key, value);
+    if ( n == 2 )
+    {
+      DBG("\r\nRead header : %s : %s\r\n", key, value);
+      m_reqHeaders[key] = value;
+    }
+    //TODO: Impl n==1 case (part 2 of previous header)
+  }
+}
+
+void HTTPRequestHandler::writeHeaders() //Called at the first writeData call
+{
+  static char line[128];
+  
+  //Response line
+  sprintf(line, "HTTP/1.1 %d MbedInfo\r\n", m_errc); //Not a violation of the standard not to include the descriptive text
+  m_pTCPSocket->send(line, strlen(line));
+  
+  map<string,string>::iterator it;
+  while( !m_respHeaders.empty() )
+  {
+    it = m_respHeaders.begin();
+    sprintf(line, "%s: %s\r\n", (*it).first.c_str(), (*it).second.c_str() );
+    DBG("\r\n%s", line);
+    m_pTCPSocket->send(line, strlen(line));
+    m_respHeaders.erase(it);
+  }
+  m_pTCPSocket->send("\r\n",2); //End of head
+}
+
+int HTTPRequestHandler::readLine(char* str, int maxLen)
+{
+  int ret;
+  int len = 0;
+  for(int i = 0; i < maxLen - 1; i++)
+  {
+    ret = m_pTCPSocket->recv(str, 1);
+    if(!ret)
+    {
+      break;
+    }
+    if( (len > 1) && *(str-1)=='\r' && *str=='\n' )
+    {
+      str--;
+      len-=2;
+      break;
+    }
+    else if( *str=='\n' )
+    {
+      len--;
+      break;    
+    }
+    str++;
+    len++;
+  }
+  *str = 0;
+  return len;
+}
+
+void HTTPRequestHandler::onTCPSocketEvent(TCPSocketEvent e)
+{
+   
+  DBG("\r\nEvent %d in HTTPRequestHandler\r\n", e);
+
+  if(m_closed)
+  {
+    DBG("\r\nWARN: Discarded\r\n");
+    return;
+  }
+
+  switch(e)
+  {
+  case TCPSOCKET_READABLE:
+    resetTimeout();
+    onReadable();
+    break;
+  case TCPSOCKET_WRITEABLE:
+    resetTimeout();
+    onWriteable();    
+    break;
+  case TCPSOCKET_CONTIMEOUT:
+  case TCPSOCKET_CONRST:
+  case TCPSOCKET_CONABRT:
+  case TCPSOCKET_ERROR:
+  case TCPSOCKET_DISCONNECTED:
+    DBG("\r\nConnection error in handler\r\n");
+    close();
+    break;
+  }
+  
+}