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 && wxUSE_STREAMS
  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   // 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   if (m_addr) {
  64       delete m_addr;
  65       m_addr = NULL;
  66   }
  67 }
  68
  69 wxString wxHTTP::GetContentType()
  70 {
  71   return GetHeader(wxT("Content-Type"));
  72 }
  73
  74 void wxHTTP::SetProxyMode(bool on)
  75 {
  76   m_proxy_mode = on;
  77 }
  78
  79 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  80 {
  81   if (m_read) {
  82     m_headers.Clear();
  83     m_read = FALSE;
  84   }
  85
  86   wxNode *node = m_headers.Find(header);
  87
  88   if (!node)
  89     m_headers.Append(header, (wxObject *)(new wxString(h_data)));
  90   else {
  91     wxString *str = (wxString *)node->Data();
  92     (*str) = h_data;
  93   }
  94 }
  95
  96 wxString wxHTTP::GetHeader(const wxString& header)
  97 {
  98   wxNode *node;
  99   wxString upper_header;
 100
 101   upper_header = header.Upper();
 102
 103   node = m_headers.Find(upper_header);
 104   if (!node)
 105     return wxEmptyString;
 106
 107   return *((wxString *)node->Data());
 108 }
 109
 110 void wxHTTP::SendHeaders()
 111 {
 112   wxNode *head = m_headers.First();
 113
 114   while (head)
 115   {
 116     wxString *str = (wxString *)head->Data();
 117
 118     wxString buf;
 119     buf.Printf(wxT("%s: %s\r\n"), head->GetKeyString(), str->GetData());
 120
 121     const wxWX2MBbuf cbuf = buf.mb_str();
 122     Write(cbuf, strlen(cbuf));
 123
 124     head = head->Next();
 125   }
 126 }
 127
 128 bool wxHTTP::ParseHeaders()
 129 {
 130   wxString line;
 131   wxStringTokenizer tokenzr;
 132
 133   m_headers.Clear();
 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     m_perr = GetLine(this, line);
 144     if (m_perr != wxPROTO_NOERR)
 145       return FALSE;
 146
 147     if (line.Length() == 0)
 148       break;
 149
 150         wxString left_str = line.BeforeFirst(':');
 151         wxString *str = new wxString(line.AfterFirst(':').Strip(wxString::both));
 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(wxSOCKET_NONE);
 216   Notify(FALSE);
 217
 218   wxSprintf(buf, wxT("%s %s HTTP/1.0\r\n"), tmp_buf, tmp_str.GetData());
 219   const wxWX2MBbuf pathbuf = wxConvLibc.cWX2MB(buf);
 220   Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 221   SendHeaders();
 222   Write("\r\n", 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 {
 269 public:
 270   wxHTTP *m_http;
 271   size_t m_httpsize;
 272   unsigned long m_read_bytes;
 273
 274   wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 275   size_t GetSize() const { return m_httpsize; }
 276   virtual ~wxHTTPStream(void) { m_http->Abort(); }
 277
 278 protected:
 279   size_t OnSysRead(void *buffer, size_t bufsize);
 280 };
 281
 282 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 283 {
 284   size_t ret;
 285
 286   if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 287     return 0;
 288
 289   ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 290   m_read_bytes += ret;
 291
 292   return ret;
 293 }
 294
 295 bool wxHTTP::Abort(void)
 296 {
 297   return wxSocketClient::Close();
 298 }
 299
 300 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 301 {
 302   wxHTTPStream *inp_stream;
 303
 304   wxString new_path;
 305
 306   m_perr = wxPROTO_CONNERR;
 307   if (!m_addr)
 308     return NULL;
 309
 310   // We set m_connected back to FALSE so wxSocketBase will know what to do.
 311   if (!wxProtocol::Connect(*m_addr))
 312     return NULL;
 313
 314   if (!BuildRequest(path, wxHTTP_GET))
 315     return NULL;
 316
 317   inp_stream = new wxHTTPStream(this);
 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(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 328
 329   return inp_stream;
 330 }
 331
 332 #endif
 333    // wxUSE_SOCKETS