src/modules/m_http_client.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "httpclient.h"
  16
  17 /* $ModDesc: HTTP client service provider */
  18
  19 class URL
  20 {
  21  public:
  22         std::string url;
  23         std::string protocol, username, password, domain, request;
  24         int port;
  25 };
  26
  27 class HTTPSocket : public BufferedSocket
  28 {
  29  private:
  30         InspIRCd *Server;
  31         class ModuleHTTPClient *Mod;
  32         HTTPClientRequest req;
  33         HTTPClientResponse *response;
  34         URL url;
  35         enum { HTTP_CLOSED, HTTP_REQSENT, HTTP_HEADERS, HTTP_DATA } status;
  36         std::string data;
  37         std::string buffer;
  38
  39  public:
  40         HTTPSocket(InspIRCd *Instance, class ModuleHTTPClient *Mod);
  41         virtual ~HTTPSocket();
  42         virtual bool DoRequest(HTTPClientRequest *req);
  43         virtual bool ParseURL(const std::string &url);
  44         virtual void Connect(const std::string &ip);
  45         virtual bool OnConnected();
  46         virtual bool OnDataReady();
  47         virtual void OnClose();
  48 };
  49
  50 class HTTPResolver : public Resolver
  51 {
  52  private:
  53         HTTPSocket *socket;
  54  public:
  55         HTTPResolver(HTTPSocket *socket, InspIRCd *Instance, const string &hostname, bool &cached, Module* me) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, cached, me), socket(socket)
  56         {
  57                 ServerInstance->Log(DEBUG,"HTTPResolver::HTTPResolver");
  58         }
  59
  60         void OnLookupComplete(const string &result, unsigned int ttl, bool cached, int resultnum = 0)
  61         {
  62                 if (!resultnum)
  63                         socket->Connect(result);
  64         }
  65
  66         void OnError(ResolverError e, const string &errmsg)
  67         {
  68                 ServerInstance->Log(DEBUG,"HTTPResolver::OnError");
  69                 /*if (ServerInstance->SocketCull.find(socket) == ServerInstance->SocketCull.end())
  70                         ServerInstance->SocketCull[socket] = socket;*/
  71         }
  72 };
  73
  74 typedef vector<HTTPSocket*> HTTPList;
  75
  76 class ModuleHTTPClient : public Module
  77 {
  78  public:
  79         HTTPList sockets;
  80
  81         ModuleHTTPClient(InspIRCd *Me)
  82                 : Module(Me)
  83         {
  84                 Implementation eventlist[] = { I_OnRequest };
  85                 ServerInstance->Modules->Attach(eventlist, this, 1);
  86         }
  87
  88         virtual ~ModuleHTTPClient()
  89         {
  90                 for (HTTPList::iterator i = sockets.begin(); i != sockets.end(); i++)
  91                         delete *i;
  92         }
  93
  94         virtual Version GetVersion()
  95         {
  96                 return Version(1, 0, 0, 0, VF_SERVICEPROVIDER | VF_VENDOR, API_VERSION);
  97         }
  98
  99
 100         char* OnRequest(Request *req)
 101         {
 102                 HTTPClientRequest *httpreq = (HTTPClientRequest *)req;
 103                 if (!strcmp(httpreq->GetId(), HTTP_CLIENT_REQUEST))
 104                 {
 105                         HTTPSocket *sock = new HTTPSocket(ServerInstance, this);
 106                         sock->DoRequest(httpreq);
 107                         // No return value
 108                 }
 109                 return NULL;
 110         }
 111 };
 112
 113 HTTPSocket::HTTPSocket(InspIRCd *Instance, ModuleHTTPClient *Mod)
 114                 : BufferedSocket(Instance), Server(Instance), Mod(Mod), status(HTTP_CLOSED)
 115 {
 116         Instance->Log(DEBUG,"HTTPSocket::HTTPSocket");
 117         this->port = 80;
 118 }
 119
 120 HTTPSocket::~HTTPSocket()
 121 {
 122         Close();
 123         for (HTTPList::iterator i = Mod->sockets.begin(); i != Mod->sockets.end(); i++)
 124         {
 125                 if (*i == this)
 126                 {
 127                         Mod->sockets.erase(i);
 128                         break;
 129                 }
 130         }
 131 }
 132
 133 bool HTTPSocket::DoRequest(HTTPClientRequest *req)
 134 {
 135         Instance->Log(DEBUG,"HTTPSocket::DoRequest");
 136         /* Tweak by brain - we take a copy of this,
 137          * so that the caller doesnt need to leave
 138          * pointers knocking around, less chance of
 139          * a memory leak.
 140          */
 141         this->req = *req;
 142
 143         if (!ParseURL(this->req.GetURL()))
 144                 return false;
 145
 146         this->port = url.port;
 147         strlcpy(this->host, url.domain.c_str(), MAXBUF);
 148
 149         in_addr addy1;
 150 #ifdef IPV6
 151         in6_addr addy2;
 152         if ((inet_aton(this->host, &addy1) > 0) || (inet_pton(AF_INET6, this->host, &addy2) > 0))
 153 #else
 154         if (inet_aton(this->host, &addy1) > 0)
 155 #endif
 156         {
 157                 bool cached;
 158                 HTTPResolver* r = new HTTPResolver(this, Server, url.domain, cached, (Module*)Mod);
 159                 Instance->AddResolver(r, cached);
 160                 return true;
 161         }
 162         else
 163         {
 164                 this->Connect(url.domain);
 165         }
 166
 167         return true;
 168 }
 169
 170 bool HTTPSocket::ParseURL(const std::string &iurl)
 171 {
 172         Instance->Log(DEBUG,"HTTPSocket::ParseURL");
 173         url.url = iurl;
 174         url.port = 80;
 175         url.protocol = "http";
 176
 177         irc::sepstream tokenizer(iurl, '/');
 178
 179         for (int p = 0;; p++)
 180         {
 181                 std::string part;
 182                 if (!tokenizer.GetToken(part))
 183                         break;
 184
 185                 if ((p == 0) && (part[part.length() - 1] == ':'))
 186                 {
 187                         // Protocol ('http:')
 188                         url.protocol = part.substr(0, part.length() - 1);
 189                 }
 190                 else if ((p == 1) && (part.empty()))
 191                 {
 192                         continue;
 193                 }
 194                 else if (url.domain.empty())
 195                 {
 196                         // Domain part: [user[:pass]@]domain[:port]
 197                         std::string::size_type usrpos = part.find('@');
 198                         if (usrpos != std::string::npos)
 199                         {
 200                                 // Have a user (and possibly password) part
 201                                 std::string::size_type ppos = part.find(':');
 202                                 if ((ppos != std::string::npos) && (ppos < usrpos))
 203                                 {
 204                                         // Have password too
 205                                         url.password = part.substr(ppos + 1, usrpos - ppos - 1);
 206                                         url.username = part.substr(0, ppos);
 207                                 }
 208                                 else
 209                                 {
 210                                         url.username = part.substr(0, usrpos);
 211                                 }
 212
 213                                 part = part.substr(usrpos + 1);
 214                         }
 215
 216                         std::string::size_type popos = part.rfind(':');
 217                         if (popos != std::string::npos)
 218                         {
 219                                 url.port = atoi(part.substr(popos + 1).c_str());
 220                                 url.domain = part.substr(0, popos);
 221                         }
 222                         else
 223                         {
 224                                 url.domain = part;
 225                         }
 226                 }
 227                 else
 228                 {
 229                         // Request (part of it)..
 230                         url.request.append("/");
 231                         url.request.append(part);
 232                 }
 233         }
 234
 235         if (url.request.empty())
 236                 url.request = "/";
 237
 238         if ((url.domain.empty()) || (!url.port) || (url.protocol.empty()))
 239         {
 240                 Instance->Log(DEFAULT, "Invalid URL (%s): Missing required value", iurl.c_str());
 241                 return false;
 242         }
 243
 244         if (url.protocol != "http")
 245         {
 246                 Instance->Log(DEFAULT, "Invalid URL (%s): Unsupported protocol '%s'", iurl.c_str(), url.protocol.c_str());
 247                 return false;
 248         }
 249
 250         return true;
 251 }
 252
 253 void HTTPSocket::Connect(const string &ip)
 254 {
 255         Instance->Log(DEBUG,"HTTPSocket::Connect");
 256         strlcpy(this->IP, ip.c_str(), MAXBUF);
 257
 258         if (!this->DoConnect())
 259         {
 260                 delete this;
 261         }
 262 }
 263
 264 bool HTTPSocket::OnConnected()
 265 {
 266         std::string request = "GET " + url.request + " HTTP/1.1\r\n";
 267
 268         // Dump headers into the request
 269         HeaderMap headers = req.GetHeaders();
 270
 271         for (HeaderMap::iterator i = headers.begin(); i != headers.end(); i++)
 272                 request += i->first + ": " + i->second + "\r\n";
 273
 274         // The Host header is required for HTTP 1.1 and isn't known when the request is created; if they didn't overload it
 275         // manually, add it here
 276         if (headers.find("Host") == headers.end())
 277                 request += "Host: " + url.domain + "\r\n";
 278
 279         request += "\r\n";
 280
 281         this->status = HTTP_REQSENT;
 282
 283         return this->Write(request);
 284 }
 285
 286 bool HTTPSocket::OnDataReady()
 287 {
 288         Instance->Log(DEBUG,"HTTPSocket::OnDataReady()");
 289         char *data = this->Read();
 290
 291         if (!data)
 292         {
 293                 this->Close();
 294                 return false;
 295         }
 296
 297         if (this->status < HTTP_DATA)
 298         {
 299                 std::string line;
 300                 std::string::size_type pos;
 301
 302                 this->buffer += data;
 303                 while ((pos = buffer.find("\r\n")) != std::string::npos)
 304                 {
 305                         line = buffer.substr(0, pos);
 306                         buffer = buffer.substr(pos + 2);
 307                         if (line.empty())
 308                         {
 309                                 this->status = HTTP_DATA;
 310                                 this->data += this->buffer;
 311                                 this->buffer.clear();
 312                                 break;
 313                         }
 314
 315                         if (this->status == HTTP_REQSENT)
 316                         {
 317                                 // HTTP reply (HTTP/1.1 200 msg)
 318                                 char const* data = line.c_str();
 319                                 data += 9;
 320                                 response = new HTTPClientResponse((Module*)Mod, req.GetSource() , url.url, atoi(data), data + 4);
 321                                 this->status = HTTP_HEADERS;
 322                                 continue;
 323                         }
 324
 325                         if ((pos = line.find(':')) != std::string::npos)
 326                         {
 327                                 response->AddHeader(line.substr(0, pos), line.substr(pos + 1));
 328                         }
 329                         else
 330                         {
 331                                 continue;
 332                         }
 333                 }
 334         }
 335         else
 336         {
 337                 this->data += data;
 338         }
 339         return true;
 340 }
 341
 342 void HTTPSocket::OnClose()
 343 {
 344         Instance->Log(DEBUG,"HTTPSocket::OnClose");
 345         if (data.empty())
 346                 return; // notification that request failed?
 347
 348         response->data = data;
 349         response->Send();
 350         delete response;
 351 }
 352
 353 MODULE_INIT(ModuleHTTPClient)
 354