src/common/http.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/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 #include "wx/thread.h"
  36
  37
  38 // ----------------------------------------------------------------------------
  39 // wxHTTP
  40 // ----------------------------------------------------------------------------
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  43 IMPLEMENT_PROTOCOL(wxHTTP, wxT("http"), wxT("80"), true)
  44
  45 wxHTTP::wxHTTP()
  46   : wxProtocol()
  47 {
  48     m_addr = NULL;
  49     m_read = false;
  50     m_proxy_mode = false;
  51     m_http_response = 0;
  52
  53     SetNotify(wxSOCKET_LOST_FLAG);
  54 }
  55
  56 wxHTTP::~wxHTTP()
  57 {
  58     ClearHeaders();
  59
  60     delete m_addr;
  61 }
  62
  63 void wxHTTP::ClearHeaders()
  64 {
  65     m_headers.clear();
  66 }
  67
  68 void wxHTTP::ClearCookies()
  69 {
  70     m_cookies.clear();
  71 }
  72
  73 wxString wxHTTP::GetContentType() const
  74 {
  75     return GetHeader(wxT("Content-Type"));
  76 }
  77
  78 void wxHTTP::SetProxyMode(bool on)
  79 {
  80     m_proxy_mode = on;
  81 }
  82
  83 wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
  84 {
  85     wxHeaderIterator it = m_headers.begin();
  86     for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
  87     {
  88         if ( header.CmpNoCase(it->first) == 0 )
  89             break;
  90     }
  91
  92     return it;
  93 }
  94
  95 wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
  96 {
  97     wxHeaderConstIterator it = m_headers.begin();
  98     for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
  99     {
 100         if ( header.CmpNoCase(it->first) == 0 )
 101             break;
 102     }
 103
 104     return it;
 105 }
 106
 107 wxHTTP::wxCookieIterator wxHTTP::FindCookie(const wxString& cookie)
 108 {
 109     wxCookieIterator it = m_cookies.begin();
 110     for ( wxCookieIterator en = m_cookies.end(); it != en; ++it )
 111     {
 112         if ( cookie.CmpNoCase(it->first) == 0 )
 113             break;
 114     }
 115
 116     return it;
 117 }
 118
 119 wxHTTP::wxCookieConstIterator wxHTTP::FindCookie(const wxString& cookie) const
 120 {
 121     wxCookieConstIterator it = m_cookies.begin();
 122     for ( wxCookieConstIterator en = m_cookies.end(); it != en; ++it )
 123     {
 124         if ( cookie.CmpNoCase(it->first) == 0 )
 125             break;
 126     }
 127
 128     return it;
 129 }
 130
 131 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
 132 {
 133     if (m_read) {
 134         ClearHeaders();
 135         m_read = false;
 136     }
 137
 138     wxHeaderIterator it = FindHeader(header);
 139     if (it != m_headers.end())
 140         it->second = h_data;
 141     else
 142         m_headers[header] = h_data;
 143 }
 144
 145 wxString wxHTTP::GetHeader(const wxString& header) const
 146 {
 147     wxHeaderConstIterator it = FindHeader(header);
 148
 149     return it == m_headers.end() ? wxGetEmptyString() : it->second;
 150 }
 151
 152 wxString wxHTTP::GetCookie(const wxString& cookie) const
 153 {
 154     wxCookieConstIterator it = FindCookie(cookie);
 155
 156     return it == m_cookies.end() ? wxGetEmptyString() : it->second;
 157 }
 158
 159 wxString wxHTTP::GenerateAuthString(const wxString& user, const wxString& pass) const
 160 {
 161     // TODO: Use wxBase64Encode() now that we have it instead of reproducing it
 162
 163     static const char *base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 164
 165     wxString buf;
 166     wxString toencode;
 167
 168     buf.Printf(wxT("Basic "));
 169
 170     toencode.Printf(wxT("%s:%s"),user.c_str(),pass.c_str());
 171
 172     size_t len = toencode.length();
 173     const wxChar *from = toencode.c_str();
 174     while (len >= 3) { // encode full blocks first
 175         buf << wxString::Format(wxT("%c%c"), base64[(from[0] >> 2) & 0x3f], base64[((from[0] << 4) & 0x30) | ((from[1] >> 4) & 0xf)]);
 176         buf << wxString::Format(wxT("%c%c"), base64[((from[1] << 2) & 0x3c) | ((from[2] >> 6) & 0x3)], base64[from[2] & 0x3f]);
 177         from += 3;
 178         len -= 3;
 179     }
 180     if (len > 0) { // pad the remaining characters
 181         buf << wxString::Format(wxT("%c"), base64[(from[0] >> 2) & 0x3f]);
 182         if (len == 1) {
 183             buf << wxString::Format(wxT("%c="), base64[(from[0] << 4) & 0x30]);
 184         } else {
 185             buf << wxString::Format(wxT("%c%c"), base64[((from[0] << 4) & 0x30) | ((from[1] >> 4) & 0xf)], base64[(from[1] << 2) & 0x3c]);
 186         }
 187         buf << wxT("=");
 188     }
 189
 190     return buf;
 191 }
 192
 193 void wxHTTP::SetPostBuffer(const wxString& post_buf)
 194 {
 195     // Use To8BitData() for backwards compatibility in this deprecated method.
 196     // The new code should use the other overload or SetPostText() and specify
 197     // the encoding to use for the text explicitly.
 198     wxScopedCharBuffer scb = post_buf.To8BitData();
 199     if ( scb.length() )
 200     {
 201         m_postBuffer.Clear();
 202         m_postBuffer.AppendData(scb.data(), scb.length());
 203     }
 204 }
 205
 206 bool
 207 wxHTTP::SetPostBuffer(const wxString& contentType,
 208                       const wxMemoryBuffer& data)
 209 {
 210     m_postBuffer = data;
 211     m_contentType = contentType;
 212
 213     return !m_postBuffer.IsEmpty();
 214 }
 215
 216 bool
 217 wxHTTP::SetPostText(const wxString& contentType,
 218                     const wxString& data,
 219                     const wxMBConv& conv)
 220 {
 221 #if wxUSE_UNICODE
 222     wxScopedCharBuffer scb = data.mb_str(conv);
 223     const size_t len = scb.length();
 224     const char* const buf = scb.data();
 225 #else // !wxUSE_UNICODE
 226     const size_t len = data.length();
 227     const char* const buf = data.mb_str(conv);
 228 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 229
 230     if ( !len )
 231         return false;
 232
 233     m_postBuffer.Clear();
 234     m_postBuffer.AppendData(buf, len);
 235     m_contentType = contentType;
 236
 237     return true;
 238 }
 239
 240 void wxHTTP::SendHeaders()
 241 {
 242     typedef wxStringToStringHashMap::iterator iterator;
 243     wxString buf;
 244
 245     for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
 246     {
 247         buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
 248
 249         const wxWX2MBbuf cbuf = buf.mb_str();
 250         Write(cbuf, strlen(cbuf));
 251     }
 252 }
 253
 254 bool wxHTTP::ParseHeaders()
 255 {
 256     wxString line;
 257     wxStringTokenizer tokenzr;
 258
 259     ClearHeaders();
 260     ClearCookies();
 261     m_read = true;
 262
 263     for ( ;; )
 264     {
 265         m_lastError = ReadLine(this, line);
 266         if (m_lastError != wxPROTO_NOERR)
 267             return false;
 268
 269         if ( line.empty() )
 270             break;
 271
 272         wxString left_str = line.BeforeFirst(':');
 273         if(!left_str.CmpNoCase("Set-Cookie"))
 274         {
 275             wxString cookieName = line.AfterFirst(':').Strip(wxString::both).BeforeFirst('=');
 276             wxString cookieValue = line.AfterFirst(':').Strip(wxString::both).AfterFirst('=').BeforeFirst(';');
 277             m_cookies[cookieName] = cookieValue;
 278
 279             // For compatibility
 280             m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 281         }
 282         else
 283         {
 284             m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 285         }
 286     }
 287     return true;
 288 }
 289
 290 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 291 {
 292     wxIPV4address *addr;
 293
 294     if (m_addr) {
 295         wxDELETE(m_addr);
 296         Close();
 297     }
 298
 299     m_addr = addr = new wxIPV4address();
 300
 301     if (!addr->Hostname(host)) {
 302         wxDELETE(m_addr);
 303         m_lastError = wxPROTO_NETERR;
 304         return false;
 305     }
 306
 307     if ( port )
 308         addr->Service(port);
 309     else if (!addr->Service(wxT("http")))
 310         addr->Service(80);
 311
 312     wxString hostHdr = host;
 313     if ( port && port != 80 )
 314         hostHdr << wxT(":") << port;
 315     SetHeader(wxT("Host"), hostHdr);
 316
 317     m_lastError = wxPROTO_NOERR;
 318     return true;
 319 }
 320
 321 bool wxHTTP::Connect(const wxSockAddress& addr, bool WXUNUSED(wait))
 322 {
 323     if (m_addr) {
 324         delete m_addr;
 325         Close();
 326     }
 327
 328     m_addr = addr.Clone();
 329
 330     wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 331     if ( ipv4addr )
 332     {
 333         wxString hostHdr = ipv4addr->OrigHostname();
 334         unsigned short port = ipv4addr->Service();
 335         if ( port && port != 80 )
 336             hostHdr << wxT(":") << port;
 337         SetHeader(wxT("Host"), hostHdr);
 338     }
 339
 340     m_lastError = wxPROTO_NOERR;
 341     return true;
 342 }
 343
 344 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 345 {
 346     const wxChar *request;
 347
 348     switch (req)
 349     {
 350         case wxHTTP_GET:
 351             request = wxT("GET");
 352             break;
 353
 354         case wxHTTP_POST:
 355             request = wxT("POST");
 356             // Content length must be correct, so always set, possibly
 357             // overriding the value set explicitly by a previous call to
 358             // SetHeader("Content-Length").
 359             if ( !m_postBuffer.IsEmpty() )
 360             {
 361                 wxString len;
 362                 len << m_postBuffer.GetDataLen();
 363
 364                 SetHeader(wxS("Content-Length"), len);
 365             }
 366
 367             // However if the user had explicitly set the content type, don't
 368             // override it with the content type passed to SetPostText().
 369             if ( !m_contentType.empty() && GetContentType().empty() )
 370                 SetHeader(wxS("Content-Type"), m_contentType);
 371             break;
 372
 373         default:
 374             return false;
 375     }
 376
 377     m_http_response = 0;
 378
 379     // If there is no User-Agent defined, define it.
 380     if ( GetHeader(wxT("User-Agent")).empty() )
 381         SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 382
 383     // Send authentication information
 384     if (!m_username.empty() || !m_password.empty()) {
 385         SetHeader(wxT("Authorization"), GenerateAuthString(m_username, m_password));
 386     }
 387
 388     SaveState();
 389
 390     // we may use non blocking sockets only if we can dispatch events from them
 391     SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 392                                                              : wxSOCKET_BLOCK );
 393     Notify(false);
 394
 395     wxString buf;
 396     buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 397     const wxWX2MBbuf pathbuf = buf.mb_str();
 398     Write(pathbuf, strlen(pathbuf));
 399     SendHeaders();
 400     Write("\r\n", 2);
 401
 402     if ( req == wxHTTP_POST ) {
 403         if ( !m_postBuffer.IsEmpty() )
 404             Write(m_postBuffer.GetData(), m_postBuffer.GetDataLen());
 405
 406         m_postBuffer.Clear();
 407     }
 408
 409     wxString tmp_str;
 410     m_lastError = ReadLine(this, tmp_str);
 411     if (m_lastError != wxPROTO_NOERR) {
 412         RestoreState();
 413         return false;
 414     }
 415
 416     if (!tmp_str.Contains(wxT("HTTP/"))) {
 417         // TODO: support HTTP v0.9 which can have no header.
 418         // FIXME: tmp_str is not put back in the in-queue of the socket.
 419         m_lastError = wxPROTO_NOERR;
 420         SetHeader(wxT("Content-Length"), wxT("-1"));
 421         SetHeader(wxT("Content-Type"), wxT("none/none"));
 422         RestoreState();
 423         return true;
 424     }
 425
 426     wxStringTokenizer token(tmp_str,wxT(' '));
 427     wxString tmp_str2;
 428     bool ret_value;
 429
 430     token.NextToken();
 431     tmp_str2 = token.NextToken();
 432
 433     m_http_response = wxAtoi(tmp_str2);
 434
 435     switch ( tmp_str2[0u].GetValue() )
 436     {
 437         case wxT('1'):
 438             /* INFORMATION / SUCCESS */
 439             break;
 440
 441         case wxT('2'):
 442             /* SUCCESS */
 443             break;
 444
 445         case wxT('3'):
 446             /* REDIRECTION */
 447             break;
 448
 449         default:
 450             m_lastError = wxPROTO_NOFILE;
 451             RestoreState();
 452             return false;
 453     }
 454
 455     m_lastError = wxPROTO_NOERR;
 456     ret_value = ParseHeaders();
 457     RestoreState();
 458     return ret_value;
 459 }
 460
 461 bool wxHTTP::Abort(void)
 462 {
 463     return wxSocketClient::Close();
 464 }
 465
 466 // ----------------------------------------------------------------------------
 467 // wxHTTPStream and wxHTTP::GetInputStream
 468 // ----------------------------------------------------------------------------
 469
 470 class wxHTTPStream : public wxSocketInputStream
 471 {
 472 public:
 473     wxHTTP *m_http;
 474     size_t m_httpsize;
 475     unsigned long m_read_bytes;
 476
 477     wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 478     size_t GetSize() const { return m_httpsize; }
 479     virtual ~wxHTTPStream(void) { m_http->Abort(); }
 480
 481 protected:
 482     size_t OnSysRead(void *buffer, size_t bufsize);
 483
 484     wxDECLARE_NO_COPY_CLASS(wxHTTPStream);
 485 };
 486
 487 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 488 {
 489     if (m_read_bytes >= m_httpsize)
 490     {
 491         m_lasterror = wxSTREAM_EOF;
 492         return 0;
 493     }
 494
 495     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 496     m_read_bytes += ret;
 497
 498     if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
 499     {
 500         // if m_httpsize is (size_t) -1 this means read until connection closed
 501         // which is equivalent to getting a READ_ERROR, for clients however this
 502         // must be translated into EOF, as it is the expected way of signalling
 503         // end end of the content
 504         m_lasterror = wxSTREAM_EOF;
 505     }
 506
 507     return ret;
 508 }
 509
 510 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 511 {
 512     wxHTTPStream *inp_stream;
 513
 514     wxString new_path;
 515
 516     m_lastError = wxPROTO_CONNERR;  // all following returns share this type of error
 517     if (!m_addr)
 518         return NULL;
 519
 520     // We set m_connected back to false so wxSocketBase will know what to do.
 521 #ifdef __WXMAC__
 522     wxSocketClient::Connect(*m_addr , false );
 523     wxSocketClient::WaitOnConnect(10);
 524
 525     if (!wxSocketClient::IsConnected())
 526         return NULL;
 527 #else
 528     if (!wxProtocol::Connect(*m_addr))
 529         return NULL;
 530 #endif
 531
 532     if (!BuildRequest(path, m_postBuffer.IsEmpty() ? wxHTTP_GET : wxHTTP_POST))
 533         return NULL;
 534
 535     inp_stream = new wxHTTPStream(this);
 536
 537     if (!GetHeader(wxT("Content-Length")).empty())
 538         inp_stream->m_httpsize = wxAtoi(GetHeader(wxT("Content-Length")));
 539     else
 540         inp_stream->m_httpsize = (size_t)-1;
 541
 542     inp_stream->m_read_bytes = 0;
 543
 544     Notify(false);
 545     SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 546
 547     // no error; reset m_lastError
 548     m_lastError = wxPROTO_NOERR;
 549     return inp_stream;
 550 }
 551
 552 #endif // wxUSE_PROTOCOL_HTTP