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 license
  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     m_headers(wxKEY_STRING)
  43 {
  44   m_addr = NULL;
  45   m_read = FALSE;
  46   m_proxy_mode = FALSE;
  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   // wxString isn't a wxObject
  61   wxNode *node = m_headers.First();
  62   wxString *string;
  63
  64   while (node) {
  65     string = (wxString *)node->Data();
  66     delete string;
  67     node = node->Next();
  68   }
  69
  70   m_headers.Clear();
  71 }
  72
  73 wxString wxHTTP::GetContentType()
  74 {
  75   return GetHeader(wxT("Content-Type"));
  76 }
  77
  78 void wxHTTP::SetProxyMode(bool on)
  79 {
  80   m_proxy_mode = on;
  81 }
  82
  83 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  84 {
  85   if (m_read) {
  86     ClearHeaders();
  87     m_read = FALSE;
  88   }
  89
  90   wxNode *node = m_headers.Find(header);
  91
  92   if (!node)
  93     m_headers.Append(header, (wxObject *)(new wxString(h_data)));
  94   else {
  95     wxString *str = (wxString *)node->Data();
  96     (*str) = h_data;
  97   }
  98 }
  99
 100 wxString wxHTTP::GetHeader(const wxString& header)
 101 {
 102   wxNode *node;
 103   wxString upper_header;
 104
 105   upper_header = header.Upper();
 106
 107   node = m_headers.Find(upper_header);
 108   if (!node)
 109     return wxEmptyString;
 110
 111   return *((wxString *)node->Data());
 112 }
 113
 114 void wxHTTP::SendHeaders()
 115 {
 116   wxNode *head = m_headers.First();
 117
 118   while (head)
 119   {
 120     wxString *str = (wxString *)head->Data();
 121
 122     wxString buf;
 123     buf.Printf(wxT("%s: %s\r\n"), head->GetKeyString(), str->GetData());
 124
 125     const wxWX2MBbuf cbuf = buf.mb_str();
 126     Write(cbuf, strlen(cbuf));
 127
 128     head = head->Next();
 129   }
 130 }
 131
 132 bool wxHTTP::ParseHeaders()
 133 {
 134   wxString line;
 135   wxStringTokenizer tokenzr;
 136
 137   ClearHeaders();
 138   m_read = TRUE;
 139
 140 #if defined(__VISAGECPP__)
 141 // VA just can't stand while(1)
 142     bool bOs2var = TRUE;
 143     while(bOs2var) {
 144 #else
 145     while (1) {
 146 #endif
 147     m_perr = GetLine(this, line);
 148     if (m_perr != wxPROTO_NOERR)
 149       return FALSE;
 150
 151     if (line.Length() == 0)
 152       break;
 153
 154     wxString left_str = line.BeforeFirst(':');
 155     wxString *str = new wxString(line.AfterFirst(':').Strip(wxString::both));
 156     left_str.MakeUpper();
 157
 158     m_headers.Append(left_str, (wxObject *) str);
 159   }
 160   return TRUE;
 161 }
 162
 163 bool wxHTTP::Connect(const wxString& host)
 164 {
 165   wxIPV4address *addr;
 166
 167   if (m_addr) {
 168     delete m_addr;
 169     m_addr = NULL;
 170     Close();
 171   }
 172
 173   m_addr = addr = new wxIPV4address();
 174
 175   if (!addr->Hostname(host)) {
 176     delete m_addr;
 177     m_addr = NULL;
 178     m_perr = wxPROTO_NETERR;
 179     return FALSE;
 180   }
 181
 182   if (!addr->Service(wxT("http")))
 183     addr->Service(80);
 184
 185   SetHeader(wxT("Host"), host);
 186
 187   return TRUE;
 188 }
 189
 190 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 191 {
 192   if (m_addr) {
 193     delete m_addr;
 194     Close();
 195   }
 196
 197   m_addr = addr.Clone();
 198
 199   wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 200   if (ipv4addr)
 201       SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 202
 203   return TRUE;
 204 }
 205
 206 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 207 {
 208   const wxChar *request;
 209
 210   switch (req) {
 211   case wxHTTP_GET:
 212     request = wxT("GET");
 213     break;
 214   default:
 215     return FALSE;
 216   }
 217
 218   // If there is no User-Agent defined, define it.
 219   if (GetHeader(wxT("User-Agent")).IsNull())
 220     SetHeader(wxT("User-Agent"), wxT("wxWindows 2.x"));
 221
 222   SaveState();
 223   SetFlags(wxSOCKET_NONE);
 224   Notify(FALSE);
 225
 226   wxString buf;
 227   buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 228   const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 229   Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 230   SendHeaders();
 231   Write("\r\n", 2);
 232
 233   wxString tmp_str;
 234   m_perr = GetLine(this, tmp_str);
 235   if (m_perr != wxPROTO_NOERR) {
 236     RestoreState();
 237     return FALSE;
 238   }
 239
 240   if (!tmp_str.Contains(wxT("HTTP/"))) {
 241     // TODO: support HTTP v0.9 which can have no header.
 242     // FIXME: tmp_str is not put back in the in-queue of the socket.
 243     SetHeader(wxT("Content-Length"), wxT("-1"));
 244     SetHeader(wxT("Content-Type"), wxT("none/none"));
 245     RestoreState();
 246     return TRUE;
 247   }
 248
 249   wxStringTokenizer token(tmp_str,wxT(' '));
 250   wxString tmp_str2;
 251   bool ret_value;
 252
 253   token.NextToken();
 254   tmp_str2 = token.NextToken();
 255
 256   switch (tmp_str2[0u]) {
 257   case wxT('1'):
 258     /* INFORMATION / SUCCESS */
 259     break;
 260   case wxT('2'):
 261     /* SUCCESS */
 262     break;
 263   case wxT('3'):
 264     /* REDIRECTION */
 265     break;
 266   default:
 267     m_perr = wxPROTO_NOFILE;
 268     RestoreState();
 269     return FALSE;
 270   }
 271
 272   ret_value = ParseHeaders();
 273   RestoreState();
 274   return ret_value;
 275 }
 276
 277 class wxHTTPStream : public wxSocketInputStream
 278 {
 279 public:
 280   wxHTTP *m_http;
 281   size_t m_httpsize;
 282   unsigned long m_read_bytes;
 283
 284   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 285   size_t GetSize() const { return m_httpsize; }
 286   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 287
 288 protected:
 289   size_t OnSysRead(void *buffer, size_t bufsize);
 290 };
 291
 292 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 293 {
 294   size_t ret;
 295
 296   if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 297     return 0;
 298
 299   ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 300   m_read_bytes += ret;
 301
 302   return ret;
 303 }
 304
 305 bool wxHTTP::Abort(void)
 306 {
 307   return wxSocketClient::Close();
 308 }
 309
 310 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 311 {
 312   wxHTTPStream *inp_stream;
 313
 314   wxString new_path;
 315
 316   m_perr = wxPROTO_CONNERR;
 317   if (!m_addr)
 318     return NULL;
 319
 320   // We set m_connected back to FALSE so wxSocketBase will know what to do.
 321 #ifdef __WXMAC__
 322         wxSocketClient::Connect(*m_addr , FALSE );
 323         wxSocketClient::WaitOnConnect(10);
 324
 325     if (!wxSocketClient::IsConnected())
 326         return NULL;
 327 #else
 328   if (!wxProtocol::Connect(*m_addr))
 329     return NULL;
 330 #endif
 331
 332   if (!BuildRequest(path, wxHTTP_GET))
 333     return NULL;
 334
 335   inp_stream = new wxHTTPStream(this);
 336
 337   if (!GetHeader(wxT("Content-Length")).IsEmpty())
 338     inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 339   else
 340     inp_stream->m_httpsize = (size_t)-1;
 341
 342   inp_stream->m_read_bytes = 0;
 343
 344   Notify(FALSE);
 345   SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 346
 347   return inp_stream;
 348 }
 349
 350 #endif // wxUSE_PROTOCOL_HTTP
 351