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     break;
 222   default:
 223     return FALSE;
 224   }
 225
 226   m_http_response = 0;
 227
 228   // If there is no User-Agent defined, define it.
 229   if (GetHeader(wxT("User-Agent")).IsNull())
 230     SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 231
 232   SaveState();
 233   SetFlags(wxSOCKET_NONE);
 234   Notify(FALSE);
 235
 236   wxString buf;
 237   buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 238   const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 239   Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 240   SendHeaders();
 241   Write("\r\n", 2);
 242
 243   if ( req == wxHTTP_POST ) {
 244     Write(m_post_buf, m_post_buf.Len());
 245     m_post_buf = wxEmptyString;
 246   }
 247
 248   wxString tmp_str;
 249   m_perr = GetLine(this, tmp_str);
 250   if (m_perr != wxPROTO_NOERR) {
 251     RestoreState();
 252     return FALSE;
 253   }
 254
 255   if (!tmp_str.Contains(wxT("HTTP/"))) {
 256     // TODO: support HTTP v0.9 which can have no header.
 257     // FIXME: tmp_str is not put back in the in-queue of the socket.
 258     SetHeader(wxT("Content-Length"), wxT("-1"));
 259     SetHeader(wxT("Content-Type"), wxT("none/none"));
 260     RestoreState();
 261     return TRUE;
 262   }
 263
 264   wxStringTokenizer token(tmp_str,wxT(' '));
 265   wxString tmp_str2;
 266   bool ret_value;
 267
 268   token.NextToken();
 269   tmp_str2 = token.NextToken();
 270
 271   m_http_response = wxAtoi(tmp_str2);
 272
 273   switch (tmp_str2[0u]) {
 274   case wxT('1'):
 275     /* INFORMATION / SUCCESS */
 276     break;
 277   case wxT('2'):
 278     /* SUCCESS */
 279     break;
 280   case wxT('3'):
 281     /* REDIRECTION */
 282     break;
 283   default:
 284     m_perr = wxPROTO_NOFILE;
 285     RestoreState();
 286     return FALSE;
 287   }
 288
 289   ret_value = ParseHeaders();
 290   RestoreState();
 291   return ret_value;
 292 }
 293
 294 class wxHTTPStream : public wxSocketInputStream
 295 {
 296 public:
 297   wxHTTP *m_http;
 298   size_t m_httpsize;
 299   unsigned long m_read_bytes;
 300
 301   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 302   size_t GetSize() const { return m_httpsize; }
 303   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 304
 305 protected:
 306   size_t OnSysRead(void *buffer, size_t bufsize);
 307
 308     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 309 };
 310
 311 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 312 {
 313     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 314     {
 315         m_lasterror = wxSTREAM_EOF;
 316         return 0;
 317     }
 318
 319     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 320     m_read_bytes += ret;
 321
 322     return ret;
 323 }
 324
 325 bool wxHTTP::Abort(void)
 326 {
 327   return wxSocketClient::Close();
 328 }
 329
 330 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 331 {
 332   wxHTTPStream *inp_stream;
 333
 334   wxString new_path;
 335
 336   m_perr = wxPROTO_CONNERR;
 337   if (!m_addr)
 338     return NULL;
 339
 340   // We set m_connected back to FALSE so wxSocketBase will know what to do.
 341 #ifdef __WXMAC__
 342         wxSocketClient::Connect(*m_addr , FALSE );
 343         wxSocketClient::WaitOnConnect(10);
 344
 345     if (!wxSocketClient::IsConnected())
 346         return NULL;
 347 #else
 348   if (!wxProtocol::Connect(*m_addr))
 349     return NULL;
 350 #endif
 351
 352   if (!BuildRequest(path, m_post_buf.IsEmpty() ? wxHTTP_GET : wxHTTP_POST))
 353     return NULL;
 354
 355   inp_stream = new wxHTTPStream(this);
 356
 357   if (!GetHeader(wxT("Content-Length")).IsEmpty())
 358     inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 359   else
 360     inp_stream->m_httpsize = (size_t)-1;
 361
 362   inp_stream->m_read_bytes = 0;
 363
 364   Notify(FALSE);
 365   SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 366
 367   return inp_stream;
 368 }
 369
 370 #endif // wxUSE_PROTOCOL_HTTP
 371