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