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 #ifndef WX_PRECOMP
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include "wx/string.h"
  29 #include "wx/tokenzr.h"
  30 #include "wx/socket.h"
  31 #include "wx/protocol/protocol.h"
  32 #include "wx/protocol/http.h"
  33 #include "wx/sckstrm.h"
  34
  35 #if !USE_SHARED_LIBRARY
  36 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  37 IMPLEMENT_PROTOCOL(wxHTTP, "http", "80", TRUE)
  38 #endif
  39
  40 #define HTTP_BSIZE 2048
  41
  42 wxHTTP::wxHTTP()
  43   : wxProtocol(),
  44     m_headers(wxKEY_STRING)
  45 {
  46   m_addr = NULL;
  47   m_read = FALSE;
  48
  49   SetNotify(REQ_LOST);
  50 }
  51
  52 wxHTTP::~wxHTTP()
  53 {
  54   // wxString isn't a wxObject
  55   wxNode *node = m_headers.First();
  56   wxString *string;
  57
  58   while (node) {
  59     string = (wxString *)node->Data();
  60     delete string;
  61     node = node->Next();
  62   }
  63 }
  64
  65 wxString wxHTTP::GetContentType()
  66 {
  67   return GetHeader("Content-Type");
  68 }
  69
  70 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  71 {
  72   if (m_read) {
  73     m_headers.Clear();
  74     m_read = FALSE;
  75   }
  76
  77   wxNode *node = m_headers.Find(header);
  78
  79   if (!node)
  80     m_headers.Append(header, (wxObject *)(new wxString(h_data)));
  81   else {
  82     wxString *str = (wxString *)node->Data();
  83     (*str) = h_data;
  84   }
  85 }
  86
  87 wxString wxHTTP::GetHeader(const wxString& header)
  88 {
  89   wxNode *node = m_headers.Find(header);
  90   if (!node)
  91     return wxEmptyString;
  92
  93   return *((wxString *)node->Data());
  94 }
  95
  96 void wxHTTP::SendHeaders()
  97 {
  98   wxNode *head = m_headers.First();
  99
 100   while (head)
 101   {
 102     wxString *str = (wxString *)head->Data();
 103
 104     wxString buf;
 105     buf.Printf("%s: %s\n\r", head->GetKeyString(), str->GetData());
 106
 107     Write(buf, buf.Len());
 108
 109     head = head->Next();
 110   }
 111 }
 112
 113 bool wxHTTP::ParseHeaders()
 114 {
 115   wxString line;
 116
 117   m_headers.Clear();
 118   m_read = TRUE;
 119
 120   while (1) {
 121     m_error = GetLine(this, line);
 122     if (m_error != wxPROTO_NOERR)
 123       return FALSE;
 124
 125     if (line.Length() == 0)
 126       break;
 127
 128     printf("Header: %s\n", WXSTRINGCAST line);
 129     int pos = line.Find(':');
 130     if (pos == -1)
 131       return FALSE;
 132
 133     wxString left_str = line(0, pos);
 134     wxString right_str = line(pos+1, line.Length());
 135
 136     right_str = right_str.Strip(wxString::leading);
 137
 138     wxString *str = new wxString(right_str);
 139
 140     m_headers.Append(left_str, (wxObject *) str);
 141   }
 142   return TRUE;
 143 }
 144
 145 bool wxHTTP::Connect(const wxString& host)
 146 {
 147   wxIPV4address *addr;
 148
 149   if (m_connected) {
 150     delete m_addr;
 151     m_addr = NULL;
 152     Close();
 153   }
 154
 155   m_addr = addr = new wxIPV4address();
 156
 157   if (!addr->Hostname(host)) {
 158     delete m_addr;
 159     m_addr = NULL;
 160     m_error = wxPROTO_NETERR;
 161     return FALSE;
 162   }
 163
 164   if (!addr->Service("http"))
 165     addr->Service(80);
 166
 167   return TRUE;
 168 }
 169
 170 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 171 {
 172   struct sockaddr *raw_addr;
 173   size_t len;
 174
 175   m_addr = (wxSockAddress *)(addr.GetClassInfo()->CreateObject());
 176
 177   addr.Build(raw_addr, len);
 178   m_addr->Disassemble(raw_addr, len);
 179
 180   return TRUE;
 181 }
 182
 183 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 184 {
 185   char *tmp_buf;
 186   char buf[HTTP_BSIZE];
 187
 188   switch (req) {
 189   case wxHTTP_GET:
 190     tmp_buf = "GET";
 191     break;
 192   default:
 193     return FALSE;
 194   }
 195
 196   SaveState();
 197   Notify(FALSE);
 198   SetFlags(WAITALL);
 199
 200   sprintf(buf, "%s %s HTTP/1.0\n\r", tmp_buf, (const char *)path);
 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("HTTP/")) {
 215     // TODO: support HTTP v0.9 which can have no header.
 216     SetHeader("Content-Length", "-1");
 217     SetHeader("Content-Type", "none/none");
 218     RestoreState();
 219     return TRUE;
 220   }
 221
 222   wxStringTokenizer token(tmp_str,' ');
 223   wxString tmp_str2;
 224   bool ret_value;
 225
 226   token.NextToken();
 227   tmp_str2 = token.NextToken();
 228
 229   switch (atoi(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   printf("Len = %s\n", WXSTRINGCAST GetHeader("Content-Length"));
 274   if (!GetHeader("Content-Length").IsEmpty())
 275     inp_stream->m_httpsize = atoi(WXSTRINGCAST GetHeader("Content-Length"));
 276
 277   return inp_stream;
 278 }