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         bool closed;
  39
  40  public:
  41         HTTPSocket(InspIRCd *Instance, class ModuleHTTPClient *Mod);
  42         virtual ~HTTPSocket();
  43         virtual bool DoRequest(HTTPClientRequest *req);
  44         virtual bool ParseURL(const std::string &url);
  45         virtual void Connect(const std::string &ip);
  46         virtual bool OnConnected();
  47         virtual bool OnDataReady();
  48         virtual void OnClose();
  49 };
  50
  51 class HTTPResolver : public Resolver
  52 {
  53  private:
  54         HTTPSocket *socket;
  55         std::string orig;
  56  public:
  57         HTTPResolver(HTTPSocket *s, InspIRCd *Instance, const string &hostname, bool &cached, Module* me) : Resolver(Instance, hostname, DNS_QUERY_FORWARD, cached, me), socket(s)
  58         {
  59                 ServerInstance->Log(DEBUG,">>>>>>>>>>>>>>>>>> HTTPResolver::HTTPResolver <<<<<<<<<<<<<<<");
  60                 orig = hostname;
  61         }
  62
  63         void OnLookupComplete(const string &result, unsigned int ttl, bool cached, int resultnum = 0)
  64         {
  65                 ServerInstance->Log(DEBUG,"************* HTTPResolver::OnLookupComplete ***************");
  66                 if (!resultnum)
  67                         socket->Connect(result);
  68                 else
  69                         socket->OnClose();
  70         }
  71
  72         void OnError(ResolverError e, const string &errmsg)
  73         {
  74                 ServerInstance->Log(DEBUG,"!!!!!!!!!!!!!!!! HTTPResolver::OnError: %s", errmsg.c_str());
  75                 socket->OnClose();
  76         }
  77 };
  78
  79 typedef vector<HTTPSocket*> HTTPList;
  80
  81 class ModuleHTTPClient : public Module
  82 {
  83  public:
  84         HTTPList sockets;
  85
  86         ModuleHTTPClient(InspIRCd *Me)
  87                 : Module(Me)
  88         {
  89                 Implementation eventlist[] = { I_OnRequest };
  90                 ServerInstance->Modules->Attach(eventlist, this, 1);
  91         }
  92
  93         virtual ~ModuleHTTPClient()
  94         {
  95                 for (HTTPList::iterator i = sockets.begin(); i != sockets.end(); i++)
  96                         (*i)->Close();
  97                 ServerInstance->BufferedSocketCull();
  98         }
  99
 100         virtual Version GetVersion()
 101         {
 102                 return Version(1, 0, 0, 0, VF_SERVICEPROVIDER | VF_VENDOR, API_VERSION);
 103         }
 104
 105
 106         char* OnRequest(Request *req)
 107         {
 108                 HTTPClientRequest *httpreq = (HTTPClientRequest *)req;
 109                 if (!strcmp(httpreq->GetId(), HTTP_CLIENT_REQUEST))
 110                 {
 111                         HTTPSocket *sock = new HTTPSocket(ServerInstance, this);
 112                         sock->DoRequest(httpreq);
 113                         // No return value
 114                 }
 115                 return NULL;
 116         }
 117 };
 118
 119 HTTPSocket::HTTPSocket(InspIRCd *Instance, ModuleHTTPClient *Mod)
 120                 : BufferedSocket(Instance), Server(Instance), Mod(Mod), status(HTTP_CLOSED)
 121 {
 122         Instance->Log(DEBUG,"HTTPSocket::HTTPSocket");
 123         this->port = 80;
 124         response = NULL;
 125         closed = false;
 126 }
 127
 128 HTTPSocket::~HTTPSocket()
 129 {
 130         Close();
 131         for (HTTPList::iterator i = Mod->sockets.begin(); i != Mod->sockets.end(); i++)
 132         {
 133                 if (*i == this)
 134                 {
 135                         Mod->sockets.erase(i);
 136                         break;
 137                 }
 138         }
 139 }
 140
 141 bool HTTPSocket::DoRequest(HTTPClientRequest *req)
 142 {
 143         Instance->Log(DEBUG,"HTTPSocket::DoRequest");
 144         /* Tweak by brain - we take a copy of this,
 145          * so that the caller doesnt need to leave
 146          * pointers knocking around, less chance of
 147          * a memory leak.
 148          */
 149         this->req = *req;
 150
 151         if (!ParseURL(this->req.GetURL()))
 152                 return false;
 153
 154         this->port = url.port;
 155         strlcpy(this->host, url.domain.c_str(), MAXBUF);
 156
 157         Instance->Log(DEBUG,"Doing request for %s", url.url.c_str());
 158
 159         in6_addr s6;
 160         in_addr s4;
 161         /* Doesnt look like an ipv4 or an ipv6 address */
 162         if ((inet_pton(AF_INET6, url.domain.c_str(), &s6) < 1) && (inet_pton(AF_INET, url.domain.c_str(), &s4) < 1))
 163         {
 164                 bool cached;
 165                 HTTPResolver* r = new HTTPResolver(this, Server, url.domain, cached, (Module*)Mod);
 166                 Instance->AddResolver(r, cached);
 167                 Instance->Log(DEBUG,"Resolver added, cached=%d", cached);
 168         }
 169         else
 170                 Connect(url.domain);
 171
 172         return true;
 173 }
 174
 175 bool HTTPSocket::ParseURL(const std::string &iurl)
 176 {
 177         Instance->Log(DEBUG,"HTTPSocket::ParseURL %s", iurl.c_str());
 178         url.url = iurl;
 179         url.port = 80;
 180         url.protocol = "http";
 181
 182         irc::sepstream tokenizer(iurl, '/');
 183
 184         for (int p = 0;; p++)
 185         {
 186                 std::string part;
 187                 if (!tokenizer.GetToken(part))
 188                         break;
 189
 190                 if ((p == 0) && (part[part.length() - 1] == ':'))
 191                 {
 192                         // Protocol ('http:')
 193                         url.protocol = part.substr(0, part.length() - 1);
 194                 }
 195                 else if ((p == 1) && (part.empty()))
 196                 {
 197                         continue;
 198                 }
 199                 else if (url.domain.empty())
 200                 {
 201                         // Domain part: [user[:pass]@]domain[:port]
 202                         std::string::size_type usrpos = part.find('@');
 203                         if (usrpos != std::string::npos)
 204                         {
 205                                 // Have a user (and possibly password) part
 206                                 std::string::size_type ppos = part.find(':');
 207                                 if ((ppos != std::string::npos) && (ppos < usrpos))
 208                                 {
 209                                         // Have password too
 210                                         url.password = part.substr(ppos + 1, usrpos - ppos - 1);
 211                                         url.username = part.substr(0, ppos);
 212                                 }
 213                                 else
 214                                 {
 215                                         url.username = part.substr(0, usrpos);
 216                                 }
 217
 218                                 part = part.substr(usrpos + 1);
 219                         }
 220
 221                         std::string::size_type popos = part.rfind(':');
 222                         if (popos != std::string::npos)
 223                         {
 224                                 url.port = atoi(part.substr(popos + 1).c_str());
 225                                 url.domain = part.substr(0, popos);
 226                         }
 227                         else
 228                         {
 229                                 url.domain = part;
 230                         }
 231                 }
 232                 else
 233                 {
 234                         // Request (part of it)..
 235                         url.request.append("/");
 236                         url.request.append(part);
 237                 }
 238         }
 239
 240         if (url.request.empty())
 241                 url.request = "/";
 242
 243         if ((url.domain.empty()) || (!url.port) || (url.protocol.empty()))
 244         {
 245                 Instance->Log(DEFAULT, "Invalid URL (%s): Missing required value", iurl.c_str());
 246                 return false;
 247         }
 248
 249         if (url.protocol != "http")
 250         {
 251                 Instance->Log(DEFAULT, "Invalid URL (%s): Unsupported protocol '%s'", iurl.c_str(), url.protocol.c_str());
 252                 return false;
 253         }
 254
 255         return true;
 256 }
 257
 258 void HTTPSocket::Connect(const string &ip)
 259 {
 260         this->response = new HTTPClientResponse((Module*)Mod, req.GetSource() , url.url, 0, "");
 261
 262         Instance->Log(DEBUG,"HTTPSocket::Connect(%s) response=%08lx", ip.c_str(), response);
 263         strlcpy(this->IP, ip.c_str(), MAXBUF);
 264         strlcpy(this->host, ip.c_str(), MAXBUF);
 265
 266         if (!this->DoConnect())
 267         {
 268                 Instance->Log(DEBUG,"DoConnect failed, bailing");
 269                 this->Close();
 270         }
 271 }
 272
 273 bool HTTPSocket::OnConnected()
 274 {
 275         Instance->Log(DEBUG,"HTTPSocket::OnConnected");
 276
 277         std::string request = "GET " + url.request + " HTTP/1.1\r\n";
 278
 279         // Dump headers into the request
 280         HeaderMap headers = req.GetHeaders();
 281
 282         for (HeaderMap::iterator i = headers.begin(); i != headers.end(); i++)
 283                 request += i->first + ": " + i->second + "\r\n";
 284
 285         // The Host header is required for HTTP 1.1 and isn't known when the request is created; if they didn't overload it
 286         // manually, add it here
 287         if (headers.find("Host") == headers.end())
 288                 request += "Host: " + url.domain + "\r\n";
 289
 290         request += "\r\n";
 291
 292         this->status = HTTP_REQSENT;
 293
 294         return this->Write(request);
 295 }
 296
 297 bool HTTPSocket::OnDataReady()
 298 {
 299         Instance->Log(DEBUG,"HTTPSocket::OnDataReady()");
 300         char *data = this->Read();
 301
 302         if (!data)
 303                 return false;
 304
 305         if (this->status < HTTP_DATA)
 306         {
 307                 std::string line;
 308                 std::string::size_type pos;
 309
 310                 this->buffer += data;
 311                 while ((pos = buffer.find("\r\n")) != std::string::npos)
 312                 {
 313                         line = buffer.substr(0, pos);
 314                         buffer = buffer.substr(pos + 2);
 315                         if (line.empty())
 316                         {
 317                                 this->status = HTTP_DATA;
 318                                 this->data += this->buffer;
 319                                 this->buffer.clear();
 320                                 break;
 321                         }
 322
 323                         if (this->status == HTTP_REQSENT)
 324                         {
 325                                 // HTTP reply (HTTP/1.1 200 msg)
 326                                 char const* data = line.c_str();
 327                                 data += 9;
 328                                 response->SetResponse(data);
 329                                 response->SetData(data + 4);
 330                                 this->status = HTTP_HEADERS;
 331                                 continue;
 332                         }
 333
 334                         if ((pos = line.find(':')) != std::string::npos)
 335                         {
 336                                 response->AddHeader(line.substr(0, pos), line.substr(pos + 1));
 337                         }
 338                         else
 339                         {
 340                                 continue;
 341                         }
 342                 }
 343         }
 344         else
 345         {
 346                 this->data += data;
 347         }
 348         return true;
 349 }
 350
 351 void HTTPSocket::OnClose()
 352 {
 353         if (!closed)
 354         {
 355                 closed = true;
 356                 Instance->Log(DEBUG,"HTTPSocket::OnClose response=%08lx", response);
 357                 std::string e;
 358                 if (data.empty())
 359                         {
 360                         Instance->Log(DEBUG,"Send error");
 361                         HTTPClientError* err = new HTTPClientError((Module*)Mod, req.GetSource(), req.GetURL(), 0);
 362                         err->Send();
 363                         delete err;
 364                         return;
 365                 }
 366
 367                 Instance->Log(DEBUG,"Set data and send, %s", response->GetURL().c_str());
 368                 response->SetData(data);
 369                 response->Send();
 370                 delete response;
 371         }
 372 }
 373
 374 MODULE_INIT(ModuleHTTPClient)
 375