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