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_SOCKETS
  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(GSOCK_LOST_FLAG);
  49 }
  50
  51 wxHTTP::~wxHTTP()
  52 {
  53   // wxString isn't a wxObject
  54   wxNode *node = m_headers.First();
  55   wxString *string;
  56
  57   while (node) {
  58     string = (wxString *)node->Data();
  59     delete string;
  60     node = node->Next();
  61   }
  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 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  75 {
  76   if (m_read) {
  77     m_headers.Clear();
  78     m_read = FALSE;
  79   }
  80
  81   wxNode *node = m_headers.Find(header);
  82
  83   if (!node)
  84     m_headers.Append(header, (wxObject *)(new wxString(h_data)));
  85   else {
  86     wxString *str = (wxString *)node->Data();
  87     (*str) = h_data;
  88   }
  89 }
  90
  91 wxString wxHTTP::GetHeader(const wxString& header)
  92 {
  93   wxNode *node;
  94   wxString upper_header;
  95
  96   upper_header = header.Upper();
  97
  98   node = m_headers.Find(upper_header);
  99   if (!node)
 100     return wxEmptyString;
 101
 102   return *((wxString *)node->Data());
 103 }
 104
 105 void wxHTTP::SendHeaders()
 106 {
 107   wxNode *head = m_headers.First();
 108
 109   while (head)
 110   {
 111     wxString *str = (wxString *)head->Data();
 112
 113     wxString buf;
 114     buf.Printf(wxT("%s: %s\n\r"), head->GetKeyString(), str->GetData());
 115
 116     const wxWX2MBbuf cbuf = buf.mb_str();
 117     Write(cbuf, strlen(cbuf));
 118
 119     head = head->Next();
 120   }
 121 }
 122
 123 bool wxHTTP::ParseHeaders()
 124 {
 125   wxString line;
 126   wxStringTokenizer tokenzr;
 127
 128   m_headers.Clear();
 129   m_read = TRUE;
 130
 131 #if defined(__VISAGECPP__)
 132 // VA just can't stand while(1)
 133     bool bOs2var = TRUE;
 134     while(bOs2var) {
 135 #else
 136     while (1) {
 137 #endif
 138     m_perr = GetLine(this, line);
 139     if (m_perr != wxPROTO_NOERR)
 140       return FALSE;
 141
 142     if (line.Length() == 0)
 143       break;
 144
 145     tokenzr.SetString(line, " :\t\n\r");
 146     if (!tokenzr.HasMoreTokens())
 147       return FALSE;
 148
 149     wxString left_str = tokenzr.GetNextToken();
 150     wxString *str = new wxString(tokenzr.GetNextToken());
 151
 152     left_str.MakeUpper();
 153
 154     m_headers.Append(left_str, (wxObject *) str);
 155   }
 156   return TRUE;
 157 }
 158
 159 bool wxHTTP::Connect(const wxString& host)
 160 {
 161   wxIPV4address *addr;
 162
 163   if (m_addr) {
 164     delete m_addr;
 165     m_addr = NULL;
 166     Close();
 167   }
 168
 169   m_addr = addr = new wxIPV4address();
 170
 171   if (!addr->Hostname(host)) {
 172     delete m_addr;
 173     m_addr = NULL;
 174     m_perr = wxPROTO_NETERR;
 175     return FALSE;
 176   }
 177
 178   if (!addr->Service(wxT("http")))
 179     addr->Service(80);
 180
 181   return TRUE;
 182 }
 183
 184 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 185 {
 186   if (m_addr) {
 187     delete m_addr;
 188     m_addr = NULL;
 189     Close();
 190   }
 191
 192   m_addr = (wxSockAddress *) addr.Clone();
 193   return TRUE;
 194 }
 195
 196 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 197 {
 198   wxChar *tmp_buf;
 199   wxChar buf[200]; // 200 is arbitrary.
 200   wxString tmp_str = path;
 201
 202   // If there is no User-Agent defined, define it.
 203   if (GetHeader(wxT("User-Agent")).IsNull())
 204     SetHeader(wxT("User-Agent"), wxT("wxWindows 2.x"));
 205
 206   switch (req) {
 207   case wxHTTP_GET:
 208     tmp_buf = wxT("GET");
 209     break;
 210   default:
 211     return FALSE;
 212   }
 213
 214   SaveState();
 215   SetFlags(NONE);
 216   Notify(FALSE);
 217
 218   wxSprintf(buf, wxT("%s %s HTTP/1.0\n\r"), tmp_buf, tmp_str.GetData());
 219   const wxWX2MBbuf pathbuf = wxConvLibc.cWX2MB(buf);
 220   Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 221   SendHeaders();
 222   Write("\n\r", 2);
 223
 224   m_perr = GetLine(this, tmp_str);
 225   if (m_perr != wxPROTO_NOERR) {
 226     RestoreState();
 227     return FALSE;
 228   }
 229
 230   if (!tmp_str.Contains(wxT("HTTP/"))) {
 231     // TODO: support HTTP v0.9 which can have no header.
 232     // FIXME: tmp_str is not put back in the in-queue of the socket.
 233     SetHeader(wxT("Content-Length"), wxT("-1"));
 234     SetHeader(wxT("Content-Type"), wxT("none/none"));
 235     RestoreState();
 236     return TRUE;
 237   }
 238
 239   wxStringTokenizer token(tmp_str,wxT(' '));
 240   wxString tmp_str2;
 241   bool ret_value;
 242
 243   token.NextToken();
 244   tmp_str2 = token.NextToken();
 245
 246   switch (tmp_str2[(unsigned int) 0]) {
 247   case wxT('1'):
 248     /* INFORMATION / SUCCESS */
 249     break;
 250   case wxT('2'):
 251     /* SUCCESS */
 252     break;
 253   case wxT('3'):
 254     /* REDIRECTION */
 255     break;
 256   default:
 257     m_perr = wxPROTO_NOFILE;
 258     RestoreState();
 259     return FALSE;
 260   }
 261
 262   ret_value = ParseHeaders();
 263   RestoreState();
 264   return ret_value;
 265 }
 266
 267 class wxHTTPStream : public wxSocketInputStream {
 268 public:
 269   wxHTTP *m_http;
 270   size_t m_httpsize;
 271   unsigned long m_read_bytes;
 272
 273   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 274   size_t GetSize() const { return m_httpsize; }
 275   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 276
 277 protected:
 278   size_t OnSysRead(void *buffer, size_t bufsize);
 279 };
 280
 281 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 282 {
 283   size_t ret;
 284
 285   if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 286     return 0;
 287
 288   ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 289   m_read_bytes += ret;
 290
 291   return ret;
 292 }
 293
 294 bool wxHTTP::Abort(void)
 295 {
 296   bool ret;
 297
 298   ret = wxSocketClient::Close();
 299
 300   return ret;
 301 }
 302
 303 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 304 {
 305   wxHTTPStream *inp_stream = new wxHTTPStream(this);
 306   wxString new_path;
 307
 308   m_perr = wxPROTO_CONNERR;
 309   if (!m_addr)
 310     return NULL;
 311
 312   // We set m_connected back to FALSE so wxSocketBase will know what to do.
 313   if (!wxProtocol::Connect(*m_addr))
 314     return NULL;
 315
 316   if (!BuildRequest(path, wxHTTP_GET))
 317     return NULL;
 318
 319   if (!GetHeader(wxT("Content-Length")).IsEmpty())
 320     inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 321   else
 322     inp_stream->m_httpsize = (size_t)-1;
 323
 324   inp_stream->m_read_bytes = 0;
 325
 326   Notify(FALSE);
 327   SetFlags(SPEED | WAITALL);
 328
 329   return inp_stream;
 330 }
 331
 332 #endif
 333    // wxUSE_SOCKETS