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, "http", "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("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("%s: %s\n\r", head->GetKeyString(), str->GetData());
 108
 109     Write(buf, buf.Len());
 110
 111     head = head->Next();
 112   }
 113 }
 114
 115 bool wxHTTP::ParseHeaders()
 116 {
 117   wxString line;
 118
 119   m_headers.Clear();
 120   m_read = TRUE;
 121
 122   while (1) {
 123     m_error = GetLine(this, line);
 124     if (m_error != wxPROTO_NOERR)
 125       return FALSE;
 126
 127     if (line.Length() == 0)
 128       break;
 129
 130     printf("Header: %s\n", WXSTRINGCAST line);
 131     int pos = line.Find(':');
 132     if (pos == -1)
 133       return FALSE;
 134
 135     wxString left_str = line(0, pos);
 136     wxString right_str = line(pos+1, line.Length());
 137
 138     right_str = right_str.Strip(wxString::leading);
 139
 140     wxString *str = new wxString(right_str);
 141
 142     m_headers.Append(left_str, (wxObject *) str);
 143   }
 144   return TRUE;
 145 }
 146
 147 bool wxHTTP::Connect(const wxString& host)
 148 {
 149   wxIPV4address *addr;
 150
 151   if (m_connected) {
 152     delete m_addr;
 153     m_addr = NULL;
 154     Close();
 155   }
 156
 157   m_addr = addr = new wxIPV4address();
 158
 159   if (!addr->Hostname(host)) {
 160     delete m_addr;
 161     m_addr = NULL;
 162     m_error = wxPROTO_NETERR;
 163     return FALSE;
 164   }
 165
 166   if (!addr->Service("http"))
 167     addr->Service(80);
 168
 169   return TRUE;
 170 }
 171
 172 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 173 {
 174   struct sockaddr *raw_addr;
 175   size_t len;
 176
 177   m_addr = (wxSockAddress *)(addr.GetClassInfo()->CreateObject());
 178
 179   addr.Build(raw_addr, len);
 180   m_addr->Disassemble(raw_addr, len);
 181
 182   return TRUE;
 183 }
 184
 185 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 186 {
 187   char *tmp_buf;
 188   char buf[HTTP_BSIZE];
 189
 190   switch (req) {
 191   case wxHTTP_GET:
 192     tmp_buf = "GET";
 193     break;
 194   default:
 195     return FALSE;
 196   }
 197
 198   SaveState();
 199   Notify(FALSE);
 200   SetFlags(WAITALL);
 201
 202   sprintf(buf, "%s %s HTTP/1.0\n\r", tmp_buf, (const char *)path);
 203   Write(buf, strlen(buf));
 204   SendHeaders();
 205   sprintf(buf, "\n\r");
 206   Write(buf, strlen(buf));
 207
 208   wxString tmp_str;
 209
 210   m_error = GetLine(this, tmp_str);
 211   if (m_error != wxPROTO_NOERR) {
 212     RestoreState();
 213     return FALSE;
 214   }
 215
 216   if (!tmp_str.Contains("HTTP/")) {
 217     // TODO: support HTTP v0.9 which can have no header.
 218     SetHeader("Content-Length", "-1");
 219     SetHeader("Content-Type", "none/none");
 220     RestoreState();
 221     return TRUE;
 222   }
 223
 224   wxStringTokenizer token(tmp_str,' ');
 225   wxString tmp_str2;
 226   bool ret_value;
 227
 228   token.NextToken();
 229   tmp_str2 = token.NextToken();
 230
 231   switch (atoi(tmp_str2)) {
 232   case 200:
 233     break;
 234   default:
 235     m_error = wxPROTO_NOFILE;
 236     RestoreState();
 237     return FALSE;
 238   }
 239
 240   ret_value = ParseHeaders();
 241   RestoreState();
 242   return ret_value;
 243 }
 244
 245 class wxHTTPStream : public wxSocketInputStream {
 246 public:
 247   wxHTTP *m_http;
 248   size_t m_httpsize;
 249
 250   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 251   size_t StreamSize() const { return m_httpsize; }
 252   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 253 };
 254
 255 bool wxHTTP::Abort(void)
 256 {
 257   return wxSocketClient::Close();
 258 }
 259
 260 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 261 {
 262   wxHTTPStream *inp_stream = new wxHTTPStream(this);
 263
 264   if (!m_addr || m_connected) {
 265     m_error = wxPROTO_CONNERR;
 266     return NULL;
 267   }
 268
 269   if (!wxProtocol::Connect(*m_addr))
 270     return NULL;
 271
 272   if (!BuildRequest(path, wxHTTP_GET))
 273     return NULL;
 274
 275   printf("Len = %s\n", WXSTRINGCAST GetHeader("Content-Length"));
 276   if (!GetHeader("Content-Length").IsEmpty())
 277     inp_stream->m_httpsize = atoi(WXSTRINGCAST GetHeader("Content-Length"));
 278
 279   return inp_stream;
 280 }
 281
 282 #endif
 283    // wxUSE_SOCKETS