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