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 <msp/strings/utils.h>
   9 #include "request.h"
  10 #include "response.h"
  11 #include "server.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace Http {
  17
  18 Server::Server(unsigned port):
  19         sock(Net::INET),
  20         event_disp(0)
  21 {
  22         sock.signal_data_available.connect(sigc::mem_fun(this, &Server::data_available));
  23         RefPtr<Net::SockAddr> addr = Net::resolve("*", format("%d", port));
  24         sock.listen(*addr, 8);
  25 }
  26
  27 // Avoid emitting sigc::signal destructor in files including server.h
  28 Server::~Server()
  29 {
  30 }
  31
  32 unsigned Server::get_port() const
  33 {
  34         const Net::SockAddr &addr = sock.get_local_address();
  35         if(addr.get_family()==Net::INET)
  36                 return static_cast<const Net::InetAddr &>(addr).get_port();
  37         return 0;
  38 }
  39
  40 void Server::use_event_dispatcher(IO::EventDispatcher *ed)
  41 {
  42         if(event_disp)
  43         {
  44                 event_disp->remove(sock);
  45                 for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  46                         event_disp->remove(*i->sock);
  47         }
  48         event_disp = ed;
  49         if(event_disp)
  50         {
  51                 event_disp->add(sock);
  52                 for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  53                         event_disp->add(*i->sock);
  54         }
  55 }
  56
  57 void Server::delay_response(Response &resp)
  58 {
  59         get_client_by_response(resp).async = true;
  60 }
  61
  62 void Server::submit_response(Response &resp)
  63 {
  64         Client &cl = get_client_by_response(resp);
  65         if(cl.async)
  66                 send_response(cl, *cl.response);
  67 }
  68
  69 void Server::cancel_keepalive(Response &resp)
  70 {
  71         get_client_by_response(resp).keepalive = false;
  72 }
  73
  74 void Server::data_available()
  75 {
  76         Net::StreamSocket *csock = sock.accept();
  77         clients.push_back(Client(csock));
  78         csock->signal_data_available.connect(sigc::bind(sigc::mem_fun(this, &Server::client_data_available), sigc::ref(clients.back())));
  79         csock->signal_end_of_file.connect(sigc::bind(sigc::mem_fun(this, &Server::client_end_of_file), sigc::ref(clients.back())));
  80         if(event_disp)
  81                 event_disp->add(*csock);
  82 }
  83
  84 void Server::client_data_available(Client &cl)
  85 {
  86         for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  87                 if(i->stale && &*i!=&cl)
  88                 {
  89                         clients.erase(i);
  90                         break;
  91                 }
  92
  93         char rbuf[4096];
  94         unsigned len = cl.sock->read(rbuf, sizeof(rbuf));
  95         if(cl.stale)
  96                 return;
  97         cl.in_buf.append(rbuf, len);
  98
  99         RefPtr<Response> response;
 100         if(!cl.request)
 101         {
 102                 if(cl.in_buf.find("\r\n\r\n")!=string::npos || cl.in_buf.find("\n\n")!=string::npos)
 103                 {
 104                         try
 105                         {
 106                                 cl.request = new Request(Request::parse(cl.in_buf));
 107
 108                                 string addr_str = cl.sock->get_peer_address().str();
 109                                 unsigned colon = addr_str.find(':');
 110                                 cl.request->set_header("-Client-Host", addr_str.substr(0, colon));
 111
 112                                 if(cl.request->get_method()!="GET" && cl.request->get_method()!="POST")
 113                                 {
 114                                         response = new Response(NOT_IMPLEMENTED);
 115                                         response->add_content("Method not implemented\n");
 116                                 }
 117                                 else if(cl.request->get_path()[0]!='/')
 118                                 {
 119                                         response = new Response(BAD_REQUEST);
 120                                         response->add_content("Path must be absolute\n");
 121                                 }
 122                         }
 123                         catch(const exception &e)
 124                         {
 125                                 response = new Response(BAD_REQUEST);
 126                                 response->add_content(e.what());
 127                         }
 128                         cl.in_buf = string();
 129                 }
 130         }
 131         else
 132         {
 133                 len = cl.request->parse_content(cl.in_buf);
 134                 cl.in_buf.erase(0, len);
 135         }
 136
 137         if(cl.request && cl.request->is_complete() && !response)
 138         {
 139                 cl.keepalive = false;
 140                 if(cl.request->has_header("Connection"))
 141                         cl.keepalive = !strcasecmp(cl.request->get_header("Connection"), "keep-alive");
 142
 143                 response = new Response(NONE);
 144                 try
 145                 {
 146                         cl.response = response.get();
 147                         responses[cl.response] = &cl;
 148                         signal_request.emit(*cl.request, *response);
 149                         if(cl.async)
 150                                 response.release();
 151                         else
 152                         {
 153                                 responses.erase(cl.response);
 154                                 cl.response = 0;
 155                                 if(response->get_status()==NONE)
 156                                 {
 157                                         response = new Response(NOT_FOUND);
 158                                         response->add_content("The requested resource was not found\n");
 159                                 }
 160                         }
 161                 }
 162                 catch(const exception &e)
 163                 {
 164                         responses.erase(cl.response);
 165                         cl.response = 0;
 166                         response = new Response(INTERNAL_ERROR);
 167                         response->add_content(e.what());
 168                 }
 169         }
 170
 171         if(response)
 172                 send_response(cl, *response);
 173 }
 174
 175 void Server::send_response(Client &cl, Response &resp)
 176 {
 177         if(cl.keepalive)
 178                 resp.set_header("Connection", "keep-alive");
 179         cl.sock->write(resp.str());
 180         cl.async = false;
 181         if(cl.keepalive)
 182         {
 183                 delete cl.request;
 184                 cl.request = 0;
 185                 delete cl.response;
 186                 cl.response = 0;
 187         }
 188         else
 189         {
 190                 cl.sock->shutdown(IO::M_WRITE);
 191                 cl.stale = true;
 192         }
 193 }
 194
 195 void Server::client_end_of_file(Client &cl)
 196 {
 197         cl.stale = true;
 198 }
 199
 200 Server::Client &Server::get_client_by_response(Response &resp)
 201 {
 202         return *get_item(responses, &resp);
 203 }
 204
 205
 206 Server::Client::Client(RefPtr<Net::StreamSocket> s):
 207         sock(s),
 208         request(0),
 209         response(0),
 210         keepalive(false),
 211         async(false),
 212         stale(false)
 213 { }
 214
 215 Server::Client::~Client()
 216 {
 217         delete request;
 218         delete response;
 219 }
 220
 221 } // namespace Http
 222 } // namespace Msp