src/common/http.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        http.cpp
   3 // Purpose:     HTTP protocol
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     August 1997
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1997, 1998 Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13   #pragma implementation "http.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20   #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_PROTOCOL_HTTP
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 #ifndef WX_PRECOMP
  29 #include "wx/string.h"
  30 #include "wx/app.h"
  31 #endif
  32
  33 #include "wx/tokenzr.h"
  34 #include "wx/socket.h"
  35 #include "wx/protocol/protocol.h"
  36 #include "wx/url.h"
  37 #include "wx/protocol/http.h"
  38 #include "wx/sckstrm.h"
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  41 IMPLEMENT_PROTOCOL(wxHTTP, wxT("http"), wxT("80"), true)
  42
  43 #define HTTP_BSIZE 2048
  44
  45 wxHTTP::wxHTTP()
  46   : wxProtocol()
  47 {
  48   m_addr = NULL;
  49   m_read = false;
  50   m_proxy_mode = false;
  51   m_post_buf = wxEmptyString;
  52   m_http_response = 0;
  53
  54   SetNotify(wxSOCKET_LOST_FLAG);
  55 }
  56
  57 wxHTTP::~wxHTTP()
  58 {
  59     ClearHeaders();
  60
  61     delete m_addr;
  62 }
  63
  64 void wxHTTP::ClearHeaders()
  65 {
  66   m_headers.clear();
  67 }
  68
  69 wxString wxHTTP::GetContentType()
  70 {
  71   return GetHeader(wxT("Content-Type"));
  72 }
  73
  74 void wxHTTP::SetProxyMode(bool on)
  75 {
  76   m_proxy_mode = on;
  77 }
  78
  79 wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
  80 {
  81     wxHeaderIterator it = m_headers.begin();
  82     for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
  83     {
  84         if ( wxStricmp(it->first, header) == 0 )
  85             break;
  86     }
  87
  88     return it;
  89 }
  90
  91 wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
  92 {
  93     wxHeaderConstIterator it = m_headers.begin();
  94     for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
  95     {
  96         if ( wxStricmp(it->first, header) == 0 )
  97             break;
  98     }
  99
 100     return it;
 101 }
 102
 103 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
 104 {
 105   if (m_read) {
 106     ClearHeaders();
 107     m_read = false;
 108   }
 109
 110   wxHeaderIterator it = FindHeader(header);
 111   if (it != m_headers.end())
 112     it->second = h_data;
 113   else
 114     m_headers[header] = h_data;
 115 }
 116
 117 wxString wxHTTP::GetHeader(const wxString& header) const
 118 {
 119     wxHeaderConstIterator it = FindHeader(header);
 120
 121     return it == m_headers.end() ? wxGetEmptyString() : it->second;
 122 }
 123
 124 void wxHTTP::SetPostBuffer(const wxString& post_buf)
 125 {
 126     m_post_buf = post_buf;
 127 }
 128
 129 void wxHTTP::SendHeaders()
 130 {
 131   typedef wxStringToStringHashMap::iterator iterator;
 132   wxString buf;
 133
 134   for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
 135   {
 136     buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
 137
 138     const wxWX2MBbuf cbuf = buf.mb_str();
 139     Write(cbuf, strlen(cbuf));
 140   }
 141 }
 142
 143 bool wxHTTP::ParseHeaders()
 144 {
 145   wxString line;
 146   wxStringTokenizer tokenzr;
 147
 148   ClearHeaders();
 149   m_read = true;
 150
 151 #if defined(__VISAGECPP__)
 152 // VA just can't stand while(1)
 153     bool bOs2var = true;
 154     while(bOs2var)
 155 #else
 156   while (1)
 157 #endif
 158   {
 159     m_perr = GetLine(this, line);
 160     if (m_perr != wxPROTO_NOERR)
 161       return false;
 162
 163     if (line.Length() == 0)
 164       break;
 165
 166     wxString left_str = line.BeforeFirst(':');
 167     m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 168   }
 169   return true;
 170 }
 171
 172 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 173 {
 174   wxIPV4address *addr;
 175
 176   if (m_addr) {
 177     delete m_addr;
 178     m_addr = NULL;
 179     Close();
 180   }
 181
 182   m_addr = addr = new wxIPV4address();
 183
 184   if (!addr->Hostname(host)) {
 185     delete m_addr;
 186     m_addr = NULL;
 187     m_perr = wxPROTO_NETERR;
 188     return false;
 189   }
 190
 191   if ( port ) addr->Service(port);
 192   else if (!addr->Service(wxT("http")))
 193     addr->Service(80);
 194
 195   SetHeader(wxT("Host"), host);
 196
 197   return true;
 198 }
 199
 200 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 201 {
 202   if (m_addr) {
 203     delete m_addr;
 204     Close();
 205   }
 206
 207   m_addr = addr.Clone();
 208
 209   wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 210   if (ipv4addr)
 211       SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 212
 213   return true;
 214 }
 215
 216 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 217 {
 218   const wxChar *request;
 219
 220   switch (req) {
 221   case wxHTTP_GET:
 222     request = wxT("GET");
 223     break;
 224   case wxHTTP_POST:
 225     request = wxT("POST");
 226     if ( GetHeader( wxT("Content-Length") ).IsNull() )
 227       SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
 228     break;
 229   default:
 230     return false;
 231   }
 232
 233   m_http_response = 0;
 234
 235   // If there is no User-Agent defined, define it.
 236   if (GetHeader(wxT("User-Agent")).IsNull())
 237     SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 238
 239   SaveState();
 240
 241   // we may use non blocking sockets only if we can dispatch events from them
 242   SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 243                                                            : wxSOCKET_BLOCK );
 244   Notify(false);
 245
 246   wxString buf;
 247   buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 248   const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 249   Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 250   SendHeaders();
 251   Write("\r\n", 2);
 252
 253   if ( req == wxHTTP_POST ) {
 254     Write(m_post_buf.mbc_str(), m_post_buf.Len());
 255     m_post_buf = wxEmptyString;
 256   }
 257
 258   wxString tmp_str;
 259   m_perr = GetLine(this, tmp_str);
 260   if (m_perr != wxPROTO_NOERR) {
 261     RestoreState();
 262     return false;
 263   }
 264
 265   if (!tmp_str.Contains(wxT("HTTP/"))) {
 266     // TODO: support HTTP v0.9 which can have no header.
 267     // FIXME: tmp_str is not put back in the in-queue of the socket.
 268     SetHeader(wxT("Content-Length"), wxT("-1"));
 269     SetHeader(wxT("Content-Type"), wxT("none/none"));
 270     RestoreState();
 271     return true;
 272   }
 273
 274   wxStringTokenizer token(tmp_str,wxT(' '));
 275   wxString tmp_str2;
 276   bool ret_value;
 277
 278   token.NextToken();
 279   tmp_str2 = token.NextToken();
 280
 281   m_http_response = wxAtoi(tmp_str2);
 282
 283   switch (tmp_str2[0u]) {
 284   case wxT('1'):
 285     /* INFORMATION / SUCCESS */
 286     break;
 287   case wxT('2'):
 288     /* SUCCESS */
 289     break;
 290   case wxT('3'):
 291     /* REDIRECTION */
 292     break;
 293   default:
 294     m_perr = wxPROTO_NOFILE;
 295     RestoreState();
 296     return false;
 297   }
 298
 299   ret_value = ParseHeaders();
 300   RestoreState();
 301   return ret_value;
 302 }
 303
 304 class wxHTTPStream : public wxSocketInputStream
 305 {
 306 public:
 307   wxHTTP *m_http;
 308   size_t m_httpsize;
 309   unsigned long m_read_bytes;
 310
 311   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 312   size_t GetSize() const { return m_httpsize; }
 313   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 314
 315 protected:
 316   size_t OnSysRead(void *buffer, size_t bufsize);
 317
 318     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 319 };
 320
 321 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 322 {
 323     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 324     {
 325         m_lasterror = wxSTREAM_EOF;
 326         return 0;
 327     }
 328
 329     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 330     m_read_bytes += ret;
 331
 332     return ret;
 333 }
 334
 335 bool wxHTTP::Abort(void)
 336 {
 337   return wxSocketClient::Close();
 338 }
 339
 340 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 341 {
 342   wxHTTPStream *inp_stream;
 343
 344   wxString new_path;
 345
 346   m_perr = wxPROTO_CONNERR;
 347   if (!m_addr)
 348     return NULL;
 349
 350   // We set m_connected back to false so wxSocketBase will know what to do.
 351 #ifdef __WXMAC__
 352         wxSocketClient::Connect(*m_addr , false );
 353         wxSocketClient::WaitOnConnect(10);
 354
 355     if (!wxSocketClient::IsConnected())
 356         return NULL;
 357 #else
 358   if (!wxProtocol::Connect(*m_addr))
 359     return NULL;
 360 #endif
 361
 362   if (!BuildRequest(path, m_post_buf.IsEmpty() ? wxHTTP_GET : wxHTTP_POST))
 363     return NULL;
 364
 365   inp_stream = new wxHTTPStream(this);
 366
 367   if (!GetHeader(wxT("Content-Length")).IsEmpty())
 368     inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 369   else
 370     inp_stream->m_httpsize = (size_t)-1;
 371
 372   inp_stream->m_read_bytes = 0;
 373
 374   Notify(false);
 375   SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 376
 377   return inp_stream;
 378 }
 379
 380 #endif // wxUSE_PROTOCOL_HTTP
 381