source/http/server.cpp

   1 #include <exception>
   2 #include <msp/core/maputils.h>
   3 #include <msp/core/refptr.h>
   4 #include <msp/net/inet.h>
   5 #include <msp/net/resolve.h>
   6 #include <msp/net/streamsocket.h>
   7 #include <msp/strings/format.h>
   8 #include "request.h"
   9 #include "response.h"
  10 #include "server.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace Http {
  16
  17 Server::Server(unsigned port):
  18         sock(Net::INET),
  19         event_disp(0)
  20 {
  21         sock.signal_data_available.connect(sigc::mem_fun(this, &Server::data_available));
  22         RefPtr<Net::SockAddr> addr = Net::resolve("*", format("%d", port));
  23         sock.listen(*addr, 8);
  24 }
  25
  26 unsigned Server::get_port() const
  27 {
  28         const Net::SockAddr &addr = sock.get_local_address();
  29         if(addr.get_family()==Net::INET)
  30                 return static_cast<const Net::InetAddr &>(addr).get_port();
  31         return 0;
  32 }
  33
  34 void Server::use_event_dispatcher(IO::EventDispatcher *ed)
  35 {
  36         if(event_disp)
  37         {
  38                 event_disp->remove(sock);
  39                 for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  40                         event_disp->remove(*i->sock);
  41         }
  42         event_disp = ed;
  43         if(event_disp)
  44         {
  45                 event_disp->add(sock);
  46                 for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  47                         event_disp->add(*i->sock);
  48         }
  49 }
  50
  51 void Server::delay_response(Response &resp)
  52 {
  53         get_client_by_response(resp).async = true;
  54 }
  55
  56 void Server::submit_response(Response &resp)
  57 {
  58         Client &cl = get_client_by_response(resp);
  59         if(cl.async)
  60         {
  61                 cl.sock->write(resp.str());
  62                 cl.stale = true;
  63         }
  64 }
  65
  66 void Server::data_available()
  67 {
  68         Net::StreamSocket *csock = sock.accept();
  69         clients.push_back(Client(csock));
  70         csock->signal_data_available.connect(sigc::bind(sigc::mem_fun(this, &Server::client_data_available), sigc::ref(clients.back())));
  71         csock->signal_end_of_file.connect(sigc::bind(sigc::mem_fun(this, &Server::client_end_of_file), sigc::ref(clients.back())));
  72         if(event_disp)
  73                 event_disp->add(*csock);
  74 }
  75
  76 void Server::client_data_available(Client &cl)
  77 {
  78         for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  79                 if(i->stale && &*i!=&cl)
  80                 {
  81                         clients.erase(i);
  82                         break;
  83                 }
  84
  85         char rbuf[4096];
  86         unsigned len = cl.sock->read(rbuf, sizeof(rbuf));
  87         if(cl.stale)
  88                 return;
  89         cl.in_buf.append(rbuf, len);
  90
  91         RefPtr<Response> response;
  92         if(!cl.request)
  93         {
  94                 if(cl.in_buf.find("\r\n\r\n")!=string::npos || cl.in_buf.find("\n\n")!=string::npos)
  95                 {
  96                         try
  97                         {
  98                                 cl.request = new Request(Request::parse(cl.in_buf));
  99
 100                                 string addr_str = cl.sock->get_peer_address().str();
 101                                 unsigned colon = addr_str.find(':');
 102                                 cl.request->set_header("-Client-Host", addr_str.substr(0, colon));
 103
 104                                 if(cl.request->get_method()!="GET" && cl.request->get_method()!="POST")
 105                                 {
 106                                         response = new Response(NOT_IMPLEMENTED);
 107                                         response->add_content("Method not implemented\n");
 108                                 }
 109                         }
 110                         catch(const exception &e)
 111                         {
 112                                 response = new Response(BAD_REQUEST);
 113                                 response->add_content(e.what());
 114                         }
 115                         cl.in_buf = string();
 116                 }
 117         }
 118         else
 119         {
 120                 len = cl.request->parse_content(cl.in_buf);
 121                 cl.in_buf.erase(0, len);
 122         }
 123
 124         bool keepalive = false;
 125         if(cl.request && cl.request->is_complete() && !response)
 126         {
 127                 if(cl.request->has_header("Connection"))
 128                         keepalive = (cl.request->get_header("Connection")=="keep-alive");
 129
 130                 response = new Response(NONE);
 131                 try
 132                 {
 133                         cl.response = response.get();
 134                         responses[cl.response] = &cl;
 135                         signal_request.emit(*cl.request, *response);
 136                         if(cl.async)
 137                                 response.release();
 138                         else
 139                         {
 140                                 responses.erase(cl.response);
 141                                 cl.response = 0;
 142                                 if(response->get_status()==NONE)
 143                                 {
 144                                         response = new Response(NOT_FOUND);
 145                                         response->add_content("The requested resource was not found\n");
 146                                 }
 147                         }
 148                 }
 149                 catch(const exception &e)
 150                 {
 151                         responses.erase(cl.response);
 152                         cl.response = 0;
 153                         response = new Response(INTERNAL_ERROR);
 154                         response->add_content(e.what());
 155                 }
 156         }
 157
 158         if(response)
 159         {
 160                 cl.sock->write(response->str());
 161                 if(keepalive)
 162                 {
 163                         delete cl.request;
 164                         cl.request = 0;
 165                         delete cl.response;
 166                         cl.response = 0;
 167                 }
 168                 else
 169                 {
 170                         cl.sock->shutdown(IO::M_WRITE);
 171                         cl.stale = true;
 172                 }
 173         }
 174 }
 175
 176 void Server::client_end_of_file(Client &cl)
 177 {
 178         cl.stale = true;
 179 }
 180
 181 Server::Client &Server::get_client_by_response(Response &resp)
 182 {
 183         return *get_item(responses, &resp);
 184 }
 185
 186
 187 Server::Client::Client(RefPtr<Net::StreamSocket> s):
 188         sock(s),
 189         request(0),
 190         response(0),
 191         async(false),
 192         stale(false)
 193 { }
 194
 195 Server::Client::~Client()
 196 {
 197         delete request;
 198         delete response;
 199 }
 200
 201 } // namespace Http
 202 } // namespace Msp