src/modules/m_http_client.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Written by Special (john@yarbbles.com) */
  18
  19 #include "inspircd.h"
  20 #include "httpclient.h"
  21
  22 /* $ModDesc: HTTP client service provider */
  23
  24 class URL
  25 {
  26  public:
  27         std::string url;
  28         std::string protocol, username, password, domain, request;
  29         int port;
  30 };
  31
  32 class HTTPSocket : public InspSocket
  33 {
  34  private:
  35         InspIRCd *Server;
  36         class ModuleHTTPClient *Mod;
  37         HTTPClientRequest *req;
  38         HTTPClientResponse *response;
  39         URL url;
  40         enum { HTTP_CLOSED, HTTP_REQSENT, HTTP_HEADERS, HTTP_DATA } status;
  41         std::string data;
  42
  43  public:
  44         HTTPSocket(InspIRCd *Instance, class ModuleHTTPClient *Mod);
  45         virtual ~HTTPSocket();
  46         virtual bool DoRequest(HTTPClientRequest *req);
  47         virtual bool ParseURL(const std::string &url);
  48         virtual void Connect(const std::string &ip);
  49         virtual bool OnConnected();
  50         virtual bool OnDataReady();
  51         virtual void OnClose();
  52 };
  53
  54 class HTTPResolver : public Resolver
  55 {
  56  private:
  57         HTTPSocket *socket;
  58  public:
  59         HTTPResolver(HTTPSocket *socket, InspIRCd *Instance, const string &hostname) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), socket(socket)
  60         {
  61         }
  62
  63         void OnLookupComplete(const string &result)
  64         {
  65                 socket->Connect(result);
  66         }
  67
  68         void OnError(ResolverError e, const string &errmsg)
  69         {
  70                 delete 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::Module(Me)
  83         {
  84         }
  85
  86         virtual ~ModuleHTTPClient()
  87         {
  88                 for (HTTPList::iterator i = sockets.begin(); i != sockets.end(); i++)
  89                         delete *i;
  90         }
  91
  92         virtual Version GetVersion()
  93         {
  94                 return Version(1, 0, 0, 0, VF_SERVICEPROVIDER | VF_VENDOR, API_VERSION);
  95         }
  96
  97         void Implements(char* List)
  98         {
  99                 List[I_OnRequest] = 1;
 100         }
 101
 102         char* OnRequest(Request *req)
 103         {
 104                 HTTPClientRequest *httpreq = (HTTPClientRequest *)req;
 105                 if (!strcmp(httpreq->GetId(), HTTP_CLIENT_REQUEST))
 106                 {
 107                         HTTPSocket *sock = new HTTPSocket(ServerInstance, this);
 108                         sock->DoRequest(httpreq);
 109                         // No return value
 110                 }
 111                 return NULL;
 112         }
 113 };
 114
 115 HTTPSocket::HTTPSocket(InspIRCd *Instance, ModuleHTTPClient *Mod)
 116                 : InspSocket(Instance), Server(Instance), Mod(Mod), status(HTTP_CLOSED)
 117 {
 118         this->ClosePending = false;
 119         this->port = 80;
 120 }
 121
 122 HTTPSocket::~HTTPSocket()
 123 {
 124         Close();
 125         for (HTTPList::iterator i = Mod->sockets.begin(); i != Mod->sockets.end(); i++)
 126         {
 127                 if (*i == this)
 128                 {
 129                         Mod->sockets.erase(i);
 130                         break;
 131                 }
 132         }
 133 }
 134
 135 bool HTTPSocket::DoRequest(HTTPClientRequest *req)
 136 {
 137         this->req = req;
 138
 139         if (!ParseURL(req->GetURL()))
 140                 return false;
 141
 142         this->port = url.port;
 143         strlcpy(this->host, url.domain.c_str(), MAXBUF);
 144
 145         if (!inet_aton(this->host, &this->addy))
 146         {
 147                 new HTTPResolver(this, Server, url.domain);
 148                 return true;
 149         }
 150         else
 151         {
 152                 this->Connect(url.domain);
 153         }
 154
 155         return true;
 156 }
 157
 158 bool HTTPSocket::ParseURL(const std::string &iurl)
 159 {
 160         url.url = iurl;
 161         url.port = 80;
 162
 163         // Tokenize by slashes (protocol:, blank, domain, request..)
 164         int pos = 0, pstart = 0, pend = 0;
 165
 166         for (; ; pend = url.url.find('/', pstart))
 167         {
 168                 string part = url.url.substr(pstart, pend);
 169
 170                 switch (pos)
 171                 {
 172                         case 0:
 173                                 // Protocol
 174                                 if (part[part.length()-1] != ':')
 175                                         return false;
 176                                 url.protocol = part.substr(0, part.length() - 1);
 177                                 break;
 178                         case 1:
 179                                 // Empty, skip
 180                                 break;
 181                         case 2:
 182                                 // User and password (user:pass@)
 183                                 string::size_type aend = part.find('@', 0);
 184                                 if (aend != string::npos)
 185                                 {
 186                                         // Technically, it is valid to not have a password (username@domain)
 187                                         string::size_type usrend = part.find(':', 0);
 188
 189                                         if ((usrend != string::npos) && (usrend < aend))
 190                                                 url.password = part.substr(usrend + 1, aend);
 191                                         else
 192                                                 usrend = aend;
 193
 194                                         url.username = part.substr(0, usrend);
 195                                 }
 196                                 else
 197                                         aend = 0;
 198
 199                                 // Port (:port)
 200                                 string::size_type dend = part.find(':', aend);
 201                                 if (dend != string::npos)
 202                                         url.port = atoi(part.substr(dend + 1).c_str());
 203
 204                                 // Domain
 205                                 url.domain = part.substr(aend + 1, dend);
 206
 207                                 // The rest of the string is the request
 208                                 url.request = url.url.substr(pend);
 209                                 break;
 210                 }
 211
 212                 if (pos++ == 2)
 213                         break;
 214
 215                 pstart = pend + 1;
 216         }
 217
 218         return true;
 219 }
 220
 221 void HTTPSocket::Connect(const string &ip)
 222 {
 223         strlcpy(this->IP, ip.c_str(), MAXBUF);
 224
 225         if (!this->DoConnect())
 226         {
 227                 Server->Log(DEBUG, "Unable to connect HTTPSocket to %s", this->host);
 228                 delete this;
 229         }
 230 }
 231
 232 bool HTTPSocket::OnConnected()
 233 {
 234         std::string request = "GET " + url.request + " HTTP/1.1\r\n";
 235
 236         // Dump headers into the request
 237         HeaderMap headers = req->GetHeaders();
 238
 239         for (HeaderMap::iterator i = headers.begin(); i != headers.end(); i++)
 240                 request += i->first + ": " + i->second + "\r\n";
 241
 242         // The Host header is required for HTTP 1.1 and isn't known when the request is created; if they didn't overload it
 243         // manually, add it here
 244         if (headers.find("Host") == headers.end())
 245                 request += "Host: " + url.domain + "\r\n";
 246
 247         request += "\r\n";
 248
 249         this->status = HTTP_REQSENT;
 250
 251         return this->Write(request);
 252 }
 253
 254 bool HTTPSocket::OnDataReady()
 255 {
 256         char *data = this->Read();
 257
 258         if (!data)
 259         {
 260                 this->Close();
 261                 return false;
 262         }
 263
 264         // Needs buffering for incomplete reads..
 265         char *lend;
 266
 267         if (this->status < HTTP_DATA)
 268         {
 269                 while ((lend = strstr(data, "\r\n")) != NULL)
 270                 {
 271                         if (strncmp(data, "\r\n", 2) == 0)
 272                         {
 273                                 this->status = HTTP_DATA;
 274                                 break;
 275                         }
 276
 277                         *lend = '\0';
 278
 279                         if (this->status == HTTP_REQSENT)
 280                         {
 281                                 // HTTP reply (HTTP/1.1 200 msg)
 282                                 data += 9;
 283                                 response = new HTTPClientResponse((Module*)Mod, req->GetSource() , url.url, atoi(data), data + 4);
 284                                 this->status = HTTP_HEADERS;
 285                                 continue;
 286                         }
 287
 288                         char *hdata = strchr(data, ':');
 289
 290                         if (!hdata)
 291                                 continue;
 292
 293                         *hdata = '\0';
 294
 295                         response->AddHeader(data, hdata + 2);
 296
 297                         data = lend + 2;
 298                 }
 299         }
 300
 301         this->data += data;
 302         return true;
 303 }
 304
 305 void HTTPSocket::OnClose()
 306 {
 307         if (!data.length())
 308         {
 309                 Server->Log(DEBUG, "HTTP socket closed unexpectedly (no content recieved)");
 310                 return;
 311         }
 312         Server->Log(DEBUG, "Got file from HTTP successfully");
 313         response->data = data;
 314         response->Send();
 315         delete response;
 316 }
 317
 318 class ModuleHTTPClientFactory : public ModuleFactory
 319 {
 320  public:
 321         ModuleHTTPClientFactory()
 322         {
 323         }
 324
 325         ~ModuleHTTPClientFactory()
 326         {
 327         }
 328
 329         Module *CreateModule(InspIRCd* Me)
 330         {
 331                 return new ModuleHTTPClient(Me);
 332         }
 333 };
 334
 335 extern "C" void *init_module(void)
 336 {
 337         return new ModuleHTTPClientFactory;
 338 }
 339
 340