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 #ifndef WX_PRECOMP
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include "wx/string.h"
  31 #include "wx/tokenzr.h"
  32 #include "wx/socket.h"
  33 #include "wx/protocol/protocol.h"
  34 #include "wx/protocol/http.h"
  35 #include "wx/sckstrm.h"
  36
  37 #if !USE_SHARED_LIBRARY
  38 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  39 IMPLEMENT_PROTOCOL(wxHTTP, _T("http"), _T("80"), TRUE)
  40 #endif
  41
  42 #define HTTP_BSIZE 2048
  43
  44 wxHTTP::wxHTTP()
  45   : wxProtocol(),
  46     m_headers(wxKEY_STRING)
  47 {
  48   m_addr = NULL;
  49   m_read = FALSE;
  50
  51   SetNotify(REQ_LOST);
  52 }
  53
  54 wxHTTP::~wxHTTP()
  55 {
  56   // wxString isn't a wxObject
  57   wxNode *node = m_headers.First();
  58   wxString *string;
  59
  60   while (node) {
  61     string = (wxString *)node->Data();
  62     delete string;
  63     node = node->Next();
  64   }
  65 }
  66
  67 wxString wxHTTP::GetContentType()
  68 {
  69   return GetHeader(_T("Content-Type"));
  70 }
  71
  72 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  73 {
  74   if (m_read) {
  75     m_headers.Clear();
  76     m_read = FALSE;
  77   }
  78
  79   wxNode *node = m_headers.Find(header);
  80
  81   if (!node)
  82     m_headers.Append(header, (wxObject *)(new wxString(h_data)));
  83   else {
  84     wxString *str = (wxString *)node->Data();
  85     (*str) = h_data;
  86   }
  87 }
  88
  89 wxString wxHTTP::GetHeader(const wxString& header)
  90 {
  91   wxNode *node = m_headers.Find(header);
  92   if (!node)
  93     return wxEmptyString;
  94
  95   return *((wxString *)node->Data());
  96 }
  97
  98 void wxHTTP::SendHeaders()
  99 {
 100   wxNode *head = m_headers.First();
 101
 102   while (head)
 103   {
 104     wxString *str = (wxString *)head->Data();
 105
 106     wxString buf;
 107     buf.Printf(_T("%s: %s\n\r"), head->GetKeyString(), str->GetData());
 108
 109     const wxWX2MBbuf cbuf = buf.mb_str();
 110     Write(cbuf, strlen(cbuf));
 111
 112     head = head->Next();
 113   }
 114 }
 115
 116 bool wxHTTP::ParseHeaders()
 117 {
 118   wxString line;
 119   wxStringTokenizer tokenzr;
 120
 121   m_headers.Clear();
 122   m_read = TRUE;
 123
 124   while (1) {
 125     m_error = GetLine(this, line);
 126     if (m_error != wxPROTO_NOERR)
 127       return FALSE;
 128
 129     if (line.Length() == 0)
 130       break;
 131
 132     tokenzr.SetString(line, " :\t\n\r");
 133     if (!tokenzr.HasMoreTokens())
 134       return FALSE;
 135
 136     wxString left_str = tokenzr.GetNextToken();
 137     wxString *str = new wxString(tokenzr.GetNextToken());
 138
 139     m_headers.Append(left_str, (wxObject *) str);
 140   }
 141   return TRUE;
 142 }
 143
 144 bool wxHTTP::Connect(const wxString& host)
 145 {
 146   wxIPV4address *addr;
 147
 148   if (m_connected) {
 149     delete m_addr;
 150     m_addr = NULL;
 151     Close();
 152   }
 153
 154   m_addr = addr = new wxIPV4address();
 155
 156   if (!addr->Hostname(host)) {
 157     delete m_addr;
 158     m_addr = NULL;
 159     m_error = wxPROTO_NETERR;
 160     return FALSE;
 161   }
 162
 163   if (!addr->Service(_T("http")))
 164     addr->Service(80);
 165
 166   return TRUE;
 167 }
 168
 169 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 170 {
 171   struct sockaddr *raw_addr;
 172   size_t len;
 173
 174   m_addr = (wxSockAddress *)(addr.GetClassInfo()->CreateObject());
 175
 176   addr.Build(raw_addr, len);
 177   m_addr->Disassemble(raw_addr, len);
 178
 179   return TRUE;
 180 }
 181
 182 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 183 {
 184   char *tmp_buf;
 185   char buf[HTTP_BSIZE];
 186   const wxWX2MBbuf pathbuf = path.mb_str();
 187
 188   switch (req) {
 189   case wxHTTP_GET:
 190     tmp_buf = "GET";
 191     break;
 192   default:
 193     return FALSE;
 194   }
 195
 196   SaveState();
 197   SetFlags(NONE);
 198   Notify(FALSE);
 199
 200   sprintf(buf, "%s %s\n\r", tmp_buf, (const char*) pathbuf);
 201   Write(buf, strlen(buf));
 202   SendHeaders();
 203   sprintf(buf, "\n\r");
 204   Write(buf, strlen(buf));
 205
 206   wxString tmp_str;
 207
 208   m_error = GetLine(this, tmp_str);
 209   if (m_error != wxPROTO_NOERR) {
 210     RestoreState();
 211     return FALSE;
 212   }
 213
 214   if (!tmp_str.Contains(_T("HTTP/"))) {
 215     // TODO: support HTTP v0.9 which can have no header.
 216     SetHeader(_T("Content-Length"), _T("-1"));
 217     SetHeader(_T("Content-Type"), _T("none/none"));
 218     RestoreState();
 219     return TRUE;
 220   }
 221
 222   wxStringTokenizer token(tmp_str,_T(' '));
 223   wxString tmp_str2;
 224   bool ret_value;
 225
 226   token.NextToken();
 227   tmp_str2 = token.NextToken();
 228
 229   switch (wxAtoi(tmp_str2)) {
 230   case 200:
 231     break;
 232   default:
 233     m_error = wxPROTO_NOFILE;
 234     RestoreState();
 235     return FALSE;
 236   }
 237
 238   ret_value = ParseHeaders();
 239   RestoreState();
 240   return ret_value;
 241 }
 242
 243 class wxHTTPStream : public wxSocketInputStream {
 244 public:
 245   wxHTTP *m_http;
 246   size_t m_httpsize;
 247
 248   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 249   size_t StreamSize() const { return m_httpsize; }
 250   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 251 };
 252
 253 bool wxHTTP::Abort(void)
 254 {
 255   return wxSocketClient::Close();
 256 }
 257
 258 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 259 {
 260   wxHTTPStream *inp_stream = new wxHTTPStream(this);
 261
 262   if (!m_addr || m_connected) {
 263     m_error = wxPROTO_CONNERR;
 264     return NULL;
 265   }
 266
 267   if (!wxProtocol::Connect(*m_addr))
 268     return NULL;
 269
 270   if (!BuildRequest(path, wxHTTP_GET))
 271     return NULL;
 272
 273   wxPrintf(_T("Len = %s\n"), WXSTRINGCAST GetHeader(_T("Content-Length")));
 274   if (!GetHeader(_T("Content-Length")).IsEmpty())
 275     inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(_T("Content-Length")));
 276
 277   SetFlags(WAITALL);
 278   return inp_stream;
 279 }
 280
 281 #endif
 282    // wxUSE_SOCKETS