src/common/http.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        http.cpp
   3 // Purpose:     HTTP protocol
   4 // Author:      Guilhem Lavaux
   5 // Modified by: Simo Virokannas (authentication, Dec 2005)
   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 wxString wxHTTP::GenerateAuthString(const wxString& user, const wxString& pass) const
 119 {
 120     static const char *base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 121
 122     wxString buf;
 123     wxString toencode;
 124
 125     buf.Printf(wxT("Basic "));
 126
 127     toencode.Printf(wxT("%s:%s"),user.c_str(),pass.c_str());
 128
 129     size_t len = toencode.Length();
 130     const wxChar *from = toencode.c_str();
 131     while (len >= 3) { // encode full blocks first
 132         buf << wxString::Format(wxT("%c%c"), base64[(from[0] >> 2) & 0x3f], base64[((from[0] << 4) & 0x30) | ((from[1] >> 4) & 0xf)]);
 133         buf << wxString::Format(wxT("%c%c"), base64[((from[1] << 2) & 0x3c) | ((from[2] >> 6) & 0x3)], base64[from[2] & 0x3f]);
 134         from += 3;
 135         len -= 3;
 136     }
 137     if (len > 0) { // pad the remaining characters
 138         buf << wxString::Format(wxT("%c"), base64[(from[0] >> 2) & 0x3f]);
 139         if (len == 1) {
 140             buf << wxString::Format(wxT("%c="), base64[(from[0] << 4) & 0x30]);
 141         } else {
 142             buf << wxString::Format(wxT("%c%c"), base64[(from[0] << 4) & 0x30] + ((from[1] >> 4) & 0xf), base64[(from[1] << 2) & 0x3c]);
 143         }
 144         buf << wxString::Format(wxT("="));
 145     }
 146
 147     return buf;
 148 }
 149
 150 void wxHTTP::SetPostBuffer(const wxString& post_buf)
 151 {
 152     m_post_buf = post_buf;
 153 }
 154
 155 void wxHTTP::SendHeaders()
 156 {
 157     typedef wxStringToStringHashMap::iterator iterator;
 158     wxString buf;
 159
 160     for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
 161     {
 162         buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
 163
 164         const wxWX2MBbuf cbuf = buf.mb_str();
 165         Write(cbuf, strlen(cbuf));
 166     }
 167 }
 168
 169 bool wxHTTP::ParseHeaders()
 170 {
 171     wxString line;
 172     wxStringTokenizer tokenzr;
 173
 174     ClearHeaders();
 175     m_read = true;
 176
 177     for ( ;; )
 178     {
 179         m_perr = ReadLine(this, line);
 180         if (m_perr != wxPROTO_NOERR)
 181             return false;
 182
 183         if (line.Length() == 0)
 184             break;
 185
 186         wxString left_str = line.BeforeFirst(':');
 187         m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 188     }
 189     return true;
 190 }
 191
 192 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 193 {
 194     wxIPV4address *addr;
 195
 196     if (m_addr) {
 197         delete m_addr;
 198         m_addr = NULL;
 199         Close();
 200     }
 201
 202     m_addr = addr = new wxIPV4address();
 203
 204     if (!addr->Hostname(host)) {
 205         delete m_addr;
 206         m_addr = NULL;
 207         m_perr = wxPROTO_NETERR;
 208         return false;
 209     }
 210
 211     if ( port )
 212         addr->Service(port);
 213     else if (!addr->Service(wxT("http")))
 214         addr->Service(80);
 215
 216     SetHeader(wxT("Host"), host);
 217
 218     return true;
 219 }
 220
 221 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 222 {
 223     if (m_addr) {
 224         delete m_addr;
 225         Close();
 226     }
 227
 228     m_addr = addr.Clone();
 229
 230     wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 231     if (ipv4addr)
 232         SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 233
 234     return true;
 235 }
 236
 237 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 238 {
 239     const wxChar *request;
 240
 241     switch (req)
 242     {
 243         case wxHTTP_GET:
 244             request = wxT("GET");
 245             break;
 246
 247         case wxHTTP_POST:
 248             request = wxT("POST");
 249             if ( GetHeader( wxT("Content-Length") ).IsNull() )
 250                 SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
 251             break;
 252
 253         default:
 254             return false;
 255     }
 256
 257     m_http_response = 0;
 258
 259     // If there is no User-Agent defined, define it.
 260     if (GetHeader(wxT("User-Agent")).IsNull())
 261         SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 262
 263     // Send authentication information
 264     if (m_username.Length()>0 || m_password.Length()>0) {
 265         SetHeader(wxT("Authorization"), GenerateAuthString(m_username, m_password));
 266     }
 267
 268     SaveState();
 269
 270     // we may use non blocking sockets only if we can dispatch events from them
 271     SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 272                                                              : wxSOCKET_BLOCK );
 273     Notify(false);
 274
 275     wxString buf;
 276     buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 277     const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 278     Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 279     SendHeaders();
 280     Write("\r\n", 2);
 281
 282     if ( req == wxHTTP_POST ) {
 283         Write(m_post_buf.mbc_str(), m_post_buf.Len());
 284         m_post_buf = wxEmptyString;
 285     }
 286
 287     wxString tmp_str;
 288     m_perr = ReadLine(this, tmp_str);
 289     if (m_perr != wxPROTO_NOERR) {
 290         RestoreState();
 291         return false;
 292     }
 293
 294     if (!tmp_str.Contains(wxT("HTTP/"))) {
 295         // TODO: support HTTP v0.9 which can have no header.
 296         // FIXME: tmp_str is not put back in the in-queue of the socket.
 297         SetHeader(wxT("Content-Length"), wxT("-1"));
 298         SetHeader(wxT("Content-Type"), wxT("none/none"));
 299         RestoreState();
 300         return true;
 301     }
 302
 303     wxStringTokenizer token(tmp_str,wxT(' '));
 304     wxString tmp_str2;
 305     bool ret_value;
 306
 307     token.NextToken();
 308     tmp_str2 = token.NextToken();
 309
 310     m_http_response = wxAtoi(tmp_str2);
 311
 312     switch (tmp_str2[0u])
 313     {
 314         case wxT('1'):
 315             /* INFORMATION / SUCCESS */
 316             break;
 317
 318         case wxT('2'):
 319             /* SUCCESS */
 320             break;
 321
 322         case wxT('3'):
 323             /* REDIRECTION */
 324             break;
 325
 326         default:
 327             m_perr = wxPROTO_NOFILE;
 328             RestoreState();
 329             return false;
 330     }
 331
 332     ret_value = ParseHeaders();
 333     RestoreState();
 334     return ret_value;
 335 }
 336
 337 class wxHTTPStream : public wxSocketInputStream
 338 {
 339 public:
 340     wxHTTP *m_http;
 341     size_t m_httpsize;
 342     unsigned long m_read_bytes;
 343
 344     wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 345     size_t GetSize() const { return m_httpsize; }
 346     virtual ~wxHTTPStream(void) { m_http->Abort(); }
 347
 348 protected:
 349     size_t OnSysRead(void *buffer, size_t bufsize);
 350
 351     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 352 };
 353
 354 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 355 {
 356     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 357     {
 358         m_lasterror = wxSTREAM_EOF;
 359         return 0;
 360     }
 361
 362     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 363     m_read_bytes += ret;
 364
 365     if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
 366     {
 367         // if m_httpsize is (size_t) -1 this means read until connection closed
 368         // which is equivalent to getting a READ_ERROR, for clients however this
 369         // must be translated into EOF, as it is the expected way of signalling
 370         // end end of the content
 371         m_lasterror = wxSTREAM_EOF ;
 372     }
 373
 374     return ret;
 375 }
 376
 377 bool wxHTTP::Abort(void)
 378 {
 379     return wxSocketClient::Close();
 380 }
 381
 382 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 383 {
 384     wxHTTPStream *inp_stream;
 385
 386     wxString new_path;
 387
 388     m_perr = wxPROTO_CONNERR;
 389     if (!m_addr)
 390         return NULL;
 391
 392     // We set m_connected back to false so wxSocketBase will know what to do.
 393 #ifdef __WXMAC__
 394     wxSocketClient::Connect(*m_addr , false );
 395     wxSocketClient::WaitOnConnect(10);
 396
 397     if (!wxSocketClient::IsConnected())
 398         return NULL;
 399 #else
 400     if (!wxProtocol::Connect(*m_addr))
 401         return NULL;
 402 #endif
 403
 404     if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
 405         return NULL;
 406
 407     inp_stream = new wxHTTPStream(this);
 408
 409     if (!GetHeader(wxT("Content-Length")).empty())
 410         inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 411     else
 412         inp_stream->m_httpsize = (size_t)-1;
 413
 414     inp_stream->m_read_bytes = 0;
 415
 416     Notify(false);
 417     SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 418
 419     return inp_stream;
 420 }
 421
 422 #endif // wxUSE_PROTOCOL_HTTP
 423