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 licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16   #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_PROTOCOL_HTTP
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #ifndef WX_PRECOMP
  25 #include "wx/string.h"
  26 #include "wx/app.h"
  27 #endif
  28
  29 #include "wx/tokenzr.h"
  30 #include "wx/socket.h"
  31 #include "wx/protocol/protocol.h"
  32 #include "wx/url.h"
  33 #include "wx/protocol/http.h"
  34 #include "wx/sckstrm.h"
  35
  36 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  37 IMPLEMENT_PROTOCOL(wxHTTP, wxT("http"), wxT("80"), true)
  38
  39 wxHTTP::wxHTTP()
  40   : wxProtocol()
  41 {
  42     m_addr = NULL;
  43     m_read = false;
  44     m_proxy_mode = false;
  45     m_post_buf = wxEmptyString;
  46     m_http_response = 0;
  47
  48     SetNotify(wxSOCKET_LOST_FLAG);
  49 }
  50
  51 wxHTTP::~wxHTTP()
  52 {
  53     ClearHeaders();
  54
  55     delete m_addr;
  56 }
  57
  58 void wxHTTP::ClearHeaders()
  59 {
  60   m_headers.clear();
  61 }
  62
  63 wxString wxHTTP::GetContentType()
  64 {
  65     return GetHeader(wxT("Content-Type"));
  66 }
  67
  68 void wxHTTP::SetProxyMode(bool on)
  69 {
  70     m_proxy_mode = on;
  71 }
  72
  73 wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
  74 {
  75     wxHeaderIterator it = m_headers.begin();
  76     for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
  77     {
  78         if ( wxStricmp(it->first, header) == 0 )
  79             break;
  80     }
  81
  82     return it;
  83 }
  84
  85 wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
  86 {
  87     wxHeaderConstIterator it = m_headers.begin();
  88     for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
  89     {
  90         if ( wxStricmp(it->first, header) == 0 )
  91             break;
  92     }
  93
  94     return it;
  95 }
  96
  97 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
  98 {
  99     if (m_read) {
 100         ClearHeaders();
 101         m_read = false;
 102     }
 103
 104     wxHeaderIterator it = FindHeader(header);
 105     if (it != m_headers.end())
 106         it->second = h_data;
 107     else
 108         m_headers[header] = h_data;
 109 }
 110
 111 wxString wxHTTP::GetHeader(const wxString& header) const
 112 {
 113     wxHeaderConstIterator it = FindHeader(header);
 114
 115     return it == m_headers.end() ? wxGetEmptyString() : it->second;
 116 }
 117
 118 void wxHTTP::SetPostBuffer(const wxString& post_buf)
 119 {
 120     m_post_buf = post_buf;
 121 }
 122
 123 void wxHTTP::SendHeaders()
 124 {
 125     typedef wxStringToStringHashMap::iterator iterator;
 126     wxString buf;
 127
 128     for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
 129     {
 130         buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
 131
 132         const wxWX2MBbuf cbuf = buf.mb_str();
 133         Write(cbuf, strlen(cbuf));
 134     }
 135 }
 136
 137 bool wxHTTP::ParseHeaders()
 138 {
 139     wxString line;
 140     wxStringTokenizer tokenzr;
 141
 142     ClearHeaders();
 143     m_read = true;
 144
 145     for ( ;; )
 146     {
 147         m_perr = ReadLine(this, line);
 148         if (m_perr != wxPROTO_NOERR)
 149             return false;
 150
 151         if (line.Length() == 0)
 152             break;
 153
 154         wxString left_str = line.BeforeFirst(':');
 155         m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 156     }
 157     return true;
 158 }
 159
 160 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 161 {
 162     wxIPV4address *addr;
 163
 164     if (m_addr) {
 165         delete m_addr;
 166         m_addr = NULL;
 167         Close();
 168     }
 169
 170     m_addr = addr = new wxIPV4address();
 171
 172     if (!addr->Hostname(host)) {
 173         delete m_addr;
 174         m_addr = NULL;
 175         m_perr = wxPROTO_NETERR;
 176         return false;
 177     }
 178
 179     if ( port )
 180         addr->Service(port);
 181     else if (!addr->Service(wxT("http")))
 182         addr->Service(80);
 183
 184     SetHeader(wxT("Host"), host);
 185
 186     return true;
 187 }
 188
 189 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 190 {
 191     if (m_addr) {
 192         delete m_addr;
 193         Close();
 194     }
 195
 196     m_addr = addr.Clone();
 197
 198     wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 199     if (ipv4addr)
 200         SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 201
 202     return true;
 203 }
 204
 205 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 206 {
 207     const wxChar *request;
 208
 209     switch (req)
 210     {
 211         case wxHTTP_GET:
 212             request = wxT("GET");
 213             break;
 214
 215         case wxHTTP_POST:
 216             request = wxT("POST");
 217             if ( GetHeader( wxT("Content-Length") ).IsNull() )
 218                 SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
 219             break;
 220
 221         default:
 222             return false;
 223     }
 224
 225     m_http_response = 0;
 226
 227     // If there is no User-Agent defined, define it.
 228     if (GetHeader(wxT("User-Agent")).IsNull())
 229         SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 230
 231     SaveState();
 232
 233     // we may use non blocking sockets only if we can dispatch events from them
 234     SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 235                                                              : wxSOCKET_BLOCK );
 236     Notify(false);
 237
 238     wxString buf;
 239     buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 240     const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 241     Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 242     SendHeaders();
 243     Write("\r\n", 2);
 244
 245     if ( req == wxHTTP_POST ) {
 246         Write(m_post_buf.mbc_str(), m_post_buf.Len());
 247         m_post_buf = wxEmptyString;
 248     }
 249
 250     wxString tmp_str;
 251     m_perr = ReadLine(this, tmp_str);
 252     if (m_perr != wxPROTO_NOERR) {
 253         RestoreState();
 254         return false;
 255     }
 256
 257     if (!tmp_str.Contains(wxT("HTTP/"))) {
 258         // TODO: support HTTP v0.9 which can have no header.
 259         // FIXME: tmp_str is not put back in the in-queue of the socket.
 260         SetHeader(wxT("Content-Length"), wxT("-1"));
 261         SetHeader(wxT("Content-Type"), wxT("none/none"));
 262         RestoreState();
 263         return true;
 264     }
 265
 266     wxStringTokenizer token(tmp_str,wxT(' '));
 267     wxString tmp_str2;
 268     bool ret_value;
 269
 270     token.NextToken();
 271     tmp_str2 = token.NextToken();
 272
 273     m_http_response = wxAtoi(tmp_str2);
 274
 275     switch (tmp_str2[0u])
 276     {
 277         case wxT('1'):
 278             /* INFORMATION / SUCCESS */
 279             break;
 280
 281         case wxT('2'):
 282             /* SUCCESS */
 283             break;
 284
 285         case wxT('3'):
 286             /* REDIRECTION */
 287             break;
 288
 289         default:
 290             m_perr = wxPROTO_NOFILE;
 291             RestoreState();
 292             return false;
 293     }
 294
 295     ret_value = ParseHeaders();
 296     RestoreState();
 297     return ret_value;
 298 }
 299
 300 class wxHTTPStream : public wxSocketInputStream
 301 {
 302 public:
 303     wxHTTP *m_http;
 304     size_t m_httpsize;
 305     unsigned long m_read_bytes;
 306
 307     wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 308     size_t GetSize() const { return m_httpsize; }
 309     virtual ~wxHTTPStream(void) { m_http->Abort(); }
 310
 311 protected:
 312     size_t OnSysRead(void *buffer, size_t bufsize);
 313
 314     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 315 };
 316
 317 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 318 {
 319     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 320     {
 321         m_lasterror = wxSTREAM_EOF;
 322         return 0;
 323     }
 324
 325     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 326     m_read_bytes += ret;
 327
 328     if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
 329     {
 330         // if m_httpsize is (size_t) -1 this means read until connection closed
 331         // which is equivalent to getting a READ_ERROR, for clients however this
 332         // must be translated into EOF, as it is the expected way of signalling
 333         // end end of the content
 334         m_lasterror = wxSTREAM_EOF ;
 335     }
 336
 337     return ret;
 338 }
 339
 340 bool wxHTTP::Abort(void)
 341 {
 342     return wxSocketClient::Close();
 343 }
 344
 345 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 346 {
 347     wxHTTPStream *inp_stream;
 348
 349     wxString new_path;
 350
 351     m_perr = wxPROTO_CONNERR;
 352     if (!m_addr)
 353         return NULL;
 354
 355     // We set m_connected back to false so wxSocketBase will know what to do.
 356 #ifdef __WXMAC__
 357     wxSocketClient::Connect(*m_addr , false );
 358     wxSocketClient::WaitOnConnect(10);
 359
 360     if (!wxSocketClient::IsConnected())
 361         return NULL;
 362 #else
 363     if (!wxProtocol::Connect(*m_addr))
 364         return NULL;
 365 #endif
 366
 367     if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
 368         return NULL;
 369
 370     inp_stream = new wxHTTPStream(this);
 371
 372     if (!GetHeader(wxT("Content-Length")).empty())
 373         inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 374     else
 375         inp_stream->m_httpsize = (size_t)-1;
 376
 377     inp_stream->m_read_bytes = 0;
 378
 379     Notify(false);
 380     SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 381
 382     return inp_stream;
 383 }
 384
 385 #endif // wxUSE_PROTOCOL_HTTP
 386