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 #if defined(__VISAGECPP__)
 146 // VA just can't stand while(1)
 147     bool bOs2var = true;
 148     while(bOs2var)
 149 #else
 150     while (1)
 151 #endif
 152     {
 153         m_perr = ReadLine(this, line);
 154         if (m_perr != wxPROTO_NOERR)
 155             return false;
 156
 157         if (line.Length() == 0)
 158             break;
 159
 160         wxString left_str = line.BeforeFirst(':');
 161         m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 162     }
 163     return true;
 164 }
 165
 166 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 167 {
 168     wxIPV4address *addr;
 169
 170     if (m_addr) {
 171         delete m_addr;
 172         m_addr = NULL;
 173         Close();
 174     }
 175
 176     m_addr = addr = new wxIPV4address();
 177
 178     if (!addr->Hostname(host)) {
 179         delete m_addr;
 180         m_addr = NULL;
 181         m_perr = wxPROTO_NETERR;
 182         return false;
 183     }
 184
 185     if ( port )
 186         addr->Service(port);
 187     else if (!addr->Service(wxT("http")))
 188         addr->Service(80);
 189
 190     SetHeader(wxT("Host"), host);
 191
 192     return true;
 193 }
 194
 195 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 196 {
 197     if (m_addr) {
 198         delete m_addr;
 199         Close();
 200     }
 201
 202     m_addr = addr.Clone();
 203
 204     wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 205     if (ipv4addr)
 206         SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 207
 208     return true;
 209 }
 210
 211 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 212 {
 213     const wxChar *request;
 214
 215     switch (req)
 216     {
 217         case wxHTTP_GET:
 218             request = wxT("GET");
 219             break;
 220
 221         case wxHTTP_POST:
 222             request = wxT("POST");
 223             if ( GetHeader( wxT("Content-Length") ).IsNull() )
 224                 SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
 225             break;
 226
 227         default:
 228             return false;
 229     }
 230
 231     m_http_response = 0;
 232
 233     // If there is no User-Agent defined, define it.
 234     if (GetHeader(wxT("User-Agent")).IsNull())
 235         SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 236
 237     SaveState();
 238
 239     // we may use non blocking sockets only if we can dispatch events from them
 240     SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 241                                                              : wxSOCKET_BLOCK );
 242     Notify(false);
 243
 244     wxString buf;
 245     buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 246     const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 247     Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 248     SendHeaders();
 249     Write("\r\n", 2);
 250
 251     if ( req == wxHTTP_POST ) {
 252         Write(m_post_buf.mbc_str(), m_post_buf.Len());
 253         m_post_buf = wxEmptyString;
 254     }
 255
 256     wxString tmp_str;
 257     m_perr = ReadLine(this, tmp_str);
 258     if (m_perr != wxPROTO_NOERR) {
 259         RestoreState();
 260         return false;
 261     }
 262
 263     if (!tmp_str.Contains(wxT("HTTP/"))) {
 264         // TODO: support HTTP v0.9 which can have no header.
 265         // FIXME: tmp_str is not put back in the in-queue of the socket.
 266         SetHeader(wxT("Content-Length"), wxT("-1"));
 267         SetHeader(wxT("Content-Type"), wxT("none/none"));
 268         RestoreState();
 269         return true;
 270     }
 271
 272     wxStringTokenizer token(tmp_str,wxT(' '));
 273     wxString tmp_str2;
 274     bool ret_value;
 275
 276     token.NextToken();
 277     tmp_str2 = token.NextToken();
 278
 279     m_http_response = wxAtoi(tmp_str2);
 280
 281     switch (tmp_str2[0u])
 282     {
 283         case wxT('1'):
 284             /* INFORMATION / SUCCESS */
 285             break;
 286
 287         case wxT('2'):
 288             /* SUCCESS */
 289             break;
 290
 291         case wxT('3'):
 292             /* REDIRECTION */
 293             break;
 294
 295         default:
 296             m_perr = wxPROTO_NOFILE;
 297             RestoreState();
 298             return false;
 299     }
 300
 301     ret_value = ParseHeaders();
 302     RestoreState();
 303     return ret_value;
 304 }
 305
 306 class wxHTTPStream : public wxSocketInputStream
 307 {
 308 public:
 309     wxHTTP *m_http;
 310     size_t m_httpsize;
 311     unsigned long m_read_bytes;
 312
 313     wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 314     size_t GetSize() const { return m_httpsize; }
 315     virtual ~wxHTTPStream(void) { m_http->Abort(); }
 316
 317 protected:
 318     size_t OnSysRead(void *buffer, size_t bufsize);
 319
 320     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 321 };
 322
 323 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 324 {
 325     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 326     {
 327         m_lasterror = wxSTREAM_EOF;
 328         return 0;
 329     }
 330
 331     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 332     m_read_bytes += ret;
 333
 334     if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
 335     {
 336         // if m_httpsize is (size_t) -1 this means read until connection closed
 337         // which is equivalent to getting a READ_ERROR, for clients however this
 338         // must be translated into EOF, as it is the expected way of signalling
 339         // end end of the content
 340         m_lasterror = wxSTREAM_EOF ;
 341     }
 342
 343     return ret;
 344 }
 345
 346 bool wxHTTP::Abort(void)
 347 {
 348     return wxSocketClient::Close();
 349 }
 350
 351 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 352 {
 353     wxHTTPStream *inp_stream;
 354
 355     wxString new_path;
 356
 357     m_perr = wxPROTO_CONNERR;
 358     if (!m_addr)
 359         return NULL;
 360
 361     // We set m_connected back to false so wxSocketBase will know what to do.
 362 #ifdef __WXMAC__
 363     wxSocketClient::Connect(*m_addr , false );
 364     wxSocketClient::WaitOnConnect(10);
 365
 366     if (!wxSocketClient::IsConnected())
 367         return NULL;
 368 #else
 369     if (!wxProtocol::Connect(*m_addr))
 370         return NULL;
 371 #endif
 372
 373     if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
 374         return NULL;
 375
 376     inp_stream = new wxHTTPStream(this);
 377
 378     if (!GetHeader(wxT("Content-Length")).empty())
 379         inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 380     else
 381         inp_stream->m_httpsize = (size_t)-1;
 382
 383     inp_stream->m_read_bytes = 0;
 384
 385     Notify(false);
 386     SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 387
 388     return inp_stream;
 389 }
 390
 391 #endif // wxUSE_PROTOCOL_HTTP
 392