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::data_available()
  70 {
  71         Net::StreamSocket *csock = sock.accept();
  72         clients.push_back(Client(csock));
  73         csock->signal_data_available.connect(sigc::bind(sigc::mem_fun(this, &Server::client_data_available), sigc::ref(clients.back())));
  74         csock->signal_end_of_file.connect(sigc::bind(sigc::mem_fun(this, &Server::client_end_of_file), sigc::ref(clients.back())));
  75         if(event_disp)
  76                 event_disp->add(*csock);
  77 }
  78
  79 void Server::client_data_available(Client &cl)
  80 {
  81         for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
  82                 if(i->stale && &*i!=&cl)
  83                 {
  84                         clients.erase(i);
  85                         break;
  86                 }
  87
  88         char rbuf[4096];
  89         unsigned len = cl.sock->read(rbuf, sizeof(rbuf));
  90         if(cl.stale)
  91                 return;
  92         cl.in_buf.append(rbuf, len);
  93
  94         RefPtr<Response> response;
  95         if(!cl.request)
  96         {
  97                 if(cl.in_buf.find("\r\n\r\n")!=string::npos || cl.in_buf.find("\n\n")!=string::npos)
  98                 {
  99                         try
 100                         {
 101                                 cl.request = new Request(Request::parse(cl.in_buf));
 102
 103                                 string addr_str = cl.sock->get_peer_address().str();
 104                                 unsigned colon = addr_str.find(':');
 105                                 cl.request->set_header("-Client-Host", addr_str.substr(0, colon));
 106
 107                                 if(cl.request->get_method()!="GET" && cl.request->get_method()!="POST")
 108                                 {
 109                                         response = new Response(NOT_IMPLEMENTED);
 110                                         response->add_content("Method not implemented\n");
 111                                 }
 112                                 else if(cl.request->get_path()[0]!='/')
 113                                 {
 114                                         response = new Response(BAD_REQUEST);
 115                                         response->add_content("Path must be absolute\n");
 116                                 }
 117                         }
 118                         catch(const exception &e)
 119                         {
 120                                 response = new Response(BAD_REQUEST);
 121                                 response->add_content(e.what());
 122                         }
 123                         cl.in_buf = string();
 124                 }
 125         }
 126         else
 127         {
 128                 len = cl.request->parse_content(cl.in_buf);
 129                 cl.in_buf.erase(0, len);
 130         }
 131
 132         if(cl.request && cl.request->is_complete() && !response)
 133         {
 134                 cl.keepalive = false;
 135                 if(cl.request->has_header("Connection"))
 136                         cl.keepalive = !strcasecmp(cl.request->get_header("Connection"), "keep-alive");
 137
 138                 response = new Response(NONE);
 139                 try
 140                 {
 141                         cl.response = response.get();
 142                         responses[cl.response] = &cl;
 143                         signal_request.emit(*cl.request, *response);
 144                         if(cl.async)
 145                                 response.release();
 146                         else
 147                         {
 148                                 responses.erase(cl.response);
 149                                 cl.response = 0;
 150                                 if(response->get_status()==NONE)
 151                                 {
 152                                         response = new Response(NOT_FOUND);
 153                                         response->add_content("The requested resource was not found\n");
 154                                 }
 155                         }
 156                 }
 157                 catch(const exception &e)
 158                 {
 159                         responses.erase(cl.response);
 160                         cl.response = 0;
 161                         response = new Response(INTERNAL_ERROR);
 162                         response->add_content(e.what());
 163                 }
 164         }
 165
 166         if(response)
 167                 send_response(cl, *response);
 168 }
 169
 170 void Server::send_response(Client &cl, Response &resp)
 171 {
 172         if(cl.keepalive)
 173                 resp.set_header("Connection", "keep-alive");
 174         cl.sock->write(resp.str());
 175         cl.async = false;
 176         if(cl.keepalive)
 177         {
 178                 delete cl.request;
 179                 cl.request = 0;
 180                 delete cl.response;
 181                 cl.response = 0;
 182         }
 183         else
 184         {
 185                 cl.sock->shutdown(IO::M_WRITE);
 186                 cl.stale = true;
 187         }
 188 }
 189
 190 void Server::client_end_of_file(Client &cl)
 191 {
 192         cl.stale = true;
 193 }
 194
 195 Server::Client &Server::get_client_by_response(Response &resp)
 196 {
 197         return *get_item(responses, &resp);
 198 }
 199
 200
 201 Server::Client::Client(RefPtr<Net::StreamSocket> s):
 202         sock(s),
 203         request(0),
 204         response(0),
 205         keepalive(false),
 206         async(false),
 207         stale(false)
 208 { }
 209
 210 Server::Client::~Client()
 211 {
 212         delete request;
 213         delete response;
 214 }
 215
 216 } // namespace Http
 217 } // namespace Msp