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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #if wxUSE_PROTOCOL_HTTP
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 #ifndef WX_PRECOMP
  29 #include "wx/string.h"
  30 #include "wx/app.h"
  31 #endif
  32
  33 #include "wx/tokenzr.h"
  34 #include "wx/socket.h"
  35 #include "wx/protocol/protocol.h"
  36 #include "wx/url.h"
  37 #include "wx/protocol/http.h"
  38 #include "wx/sckstrm.h"
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
  41 IMPLEMENT_PROTOCOL(wxHTTP, wxT("http"), wxT("80"), true)
  42
  43 wxHTTP::wxHTTP()
  44   : wxProtocol()
  45 {
  46     m_addr = NULL;
  47     m_read = false;
  48     m_proxy_mode = false;
  49     m_post_buf = wxEmptyString;
  50     m_http_response = 0;
  51
  52     SetNotify(wxSOCKET_LOST_FLAG);
  53 }
  54
  55 wxHTTP::~wxHTTP()
  56 {
  57     ClearHeaders();
  58
  59     delete m_addr;
  60 }
  61
  62 void wxHTTP::ClearHeaders()
  63 {
  64   m_headers.clear();
  65 }
  66
  67 wxString wxHTTP::GetContentType()
  68 {
  69     return GetHeader(wxT("Content-Type"));
  70 }
  71
  72 void wxHTTP::SetProxyMode(bool on)
  73 {
  74     m_proxy_mode = on;
  75 }
  76
  77 wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
  78 {
  79     wxHeaderIterator it = m_headers.begin();
  80     for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
  81     {
  82         if ( wxStricmp(it->first, header) == 0 )
  83             break;
  84     }
  85
  86     return it;
  87 }
  88
  89 wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
  90 {
  91     wxHeaderConstIterator it = m_headers.begin();
  92     for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
  93     {
  94         if ( wxStricmp(it->first, header) == 0 )
  95             break;
  96     }
  97
  98     return it;
  99 }
 100
 101 void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
 102 {
 103     if (m_read) {
 104         ClearHeaders();
 105         m_read = false;
 106     }
 107
 108     wxHeaderIterator it = FindHeader(header);
 109     if (it != m_headers.end())
 110         it->second = h_data;
 111     else
 112         m_headers[header] = h_data;
 113 }
 114
 115 wxString wxHTTP::GetHeader(const wxString& header) const
 116 {
 117     wxHeaderConstIterator it = FindHeader(header);
 118
 119     return it == m_headers.end() ? wxGetEmptyString() : it->second;
 120 }
 121
 122 void wxHTTP::SetPostBuffer(const wxString& post_buf)
 123 {
 124     m_post_buf = post_buf;
 125 }
 126
 127 void wxHTTP::SendHeaders()
 128 {
 129     typedef wxStringToStringHashMap::iterator iterator;
 130     wxString buf;
 131
 132     for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
 133     {
 134         buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
 135
 136         const wxWX2MBbuf cbuf = buf.mb_str();
 137         Write(cbuf, strlen(cbuf));
 138     }
 139 }
 140
 141 bool wxHTTP::ParseHeaders()
 142 {
 143     wxString line;
 144     wxStringTokenizer tokenzr;
 145
 146     ClearHeaders();
 147     m_read = true;
 148
 149 #if defined(__VISAGECPP__)
 150 // VA just can't stand while(1)
 151     bool bOs2var = true;
 152     while(bOs2var)
 153 #else
 154     while (1)
 155 #endif
 156     {
 157         m_perr = ReadLine(this, line);
 158         if (m_perr != wxPROTO_NOERR)
 159             return false;
 160
 161         if (line.Length() == 0)
 162             break;
 163
 164         wxString left_str = line.BeforeFirst(':');
 165         m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
 166     }
 167     return true;
 168 }
 169
 170 bool wxHTTP::Connect(const wxString& host, unsigned short port)
 171 {
 172     wxIPV4address *addr;
 173
 174     if (m_addr) {
 175         delete m_addr;
 176         m_addr = NULL;
 177         Close();
 178     }
 179
 180     m_addr = addr = new wxIPV4address();
 181
 182     if (!addr->Hostname(host)) {
 183         delete m_addr;
 184         m_addr = NULL;
 185         m_perr = wxPROTO_NETERR;
 186         return false;
 187     }
 188
 189     if ( port )
 190         addr->Service(port);
 191     else if (!addr->Service(wxT("http")))
 192         addr->Service(80);
 193
 194     SetHeader(wxT("Host"), host);
 195
 196     return true;
 197 }
 198
 199 bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
 200 {
 201     if (m_addr) {
 202         delete m_addr;
 203         Close();
 204     }
 205
 206     m_addr = addr.Clone();
 207
 208     wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
 209     if (ipv4addr)
 210         SetHeader(wxT("Host"), ipv4addr->OrigHostname());
 211
 212     return true;
 213 }
 214
 215 bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
 216 {
 217     const wxChar *request;
 218
 219     switch (req)
 220     {
 221         case wxHTTP_GET:
 222             request = wxT("GET");
 223             break;
 224
 225         case wxHTTP_POST:
 226             request = wxT("POST");
 227             if ( GetHeader( wxT("Content-Length") ).IsNull() )
 228                 SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
 229             break;
 230
 231         default:
 232             return false;
 233     }
 234
 235     m_http_response = 0;
 236
 237     // If there is no User-Agent defined, define it.
 238     if (GetHeader(wxT("User-Agent")).IsNull())
 239         SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
 240
 241     SaveState();
 242
 243     // we may use non blocking sockets only if we can dispatch events from them
 244     SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
 245                                                              : wxSOCKET_BLOCK );
 246     Notify(false);
 247
 248     wxString buf;
 249     buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
 250     const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
 251     Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
 252     SendHeaders();
 253     Write("\r\n", 2);
 254
 255     if ( req == wxHTTP_POST ) {
 256         Write(m_post_buf.mbc_str(), m_post_buf.Len());
 257         m_post_buf = wxEmptyString;
 258     }
 259
 260     wxString tmp_str;
 261     m_perr = ReadLine(this, tmp_str);
 262     if (m_perr != wxPROTO_NOERR) {
 263         RestoreState();
 264         return false;
 265     }
 266
 267     if (!tmp_str.Contains(wxT("HTTP/"))) {
 268         // TODO: support HTTP v0.9 which can have no header.
 269         // FIXME: tmp_str is not put back in the in-queue of the socket.
 270         SetHeader(wxT("Content-Length"), wxT("-1"));
 271         SetHeader(wxT("Content-Type"), wxT("none/none"));
 272         RestoreState();
 273         return true;
 274     }
 275
 276     wxStringTokenizer token(tmp_str,wxT(' '));
 277     wxString tmp_str2;
 278     bool ret_value;
 279
 280     token.NextToken();
 281     tmp_str2 = token.NextToken();
 282
 283     m_http_response = wxAtoi(tmp_str2);
 284
 285     switch (tmp_str2[0u])
 286     {
 287         case wxT('1'):
 288             /* INFORMATION / SUCCESS */
 289             break;
 290
 291         case wxT('2'):
 292             /* SUCCESS */
 293             break;
 294
 295         case wxT('3'):
 296             /* REDIRECTION */
 297             break;
 298
 299         default:
 300             m_perr = wxPROTO_NOFILE;
 301             RestoreState();
 302             return false;
 303     }
 304
 305     ret_value = ParseHeaders();
 306     RestoreState();
 307     return ret_value;
 308 }
 309
 310 class wxHTTPStream : public wxSocketInputStream
 311 {
 312 public:
 313     wxHTTP *m_http;
 314     size_t m_httpsize;
 315     unsigned long m_read_bytes;
 316
 317     wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
 318     size_t GetSize() const { return m_httpsize; }
 319     virtual ~wxHTTPStream(void) { m_http->Abort(); }
 320
 321 protected:
 322     size_t OnSysRead(void *buffer, size_t bufsize);
 323
 324     DECLARE_NO_COPY_CLASS(wxHTTPStream)
 325 };
 326
 327 size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
 328 {
 329     if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
 330     {
 331         m_lasterror = wxSTREAM_EOF;
 332         return 0;
 333     }
 334
 335     size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
 336     m_read_bytes += ret;
 337
 338     if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
 339     {
 340         // if m_httpsize is (size_t) -1 this means read until connection closed
 341         // which is equivalent to getting a READ_ERROR, for clients however this
 342         // must be translated into EOF, as it is the expected way of signalling
 343         // end end of the content
 344         m_lasterror = wxSTREAM_EOF ;
 345     }
 346
 347     return ret;
 348 }
 349
 350 bool wxHTTP::Abort(void)
 351 {
 352     return wxSocketClient::Close();
 353 }
 354
 355 wxInputStream *wxHTTP::GetInputStream(const wxString& path)
 356 {
 357     wxHTTPStream *inp_stream;
 358
 359     wxString new_path;
 360
 361     m_perr = wxPROTO_CONNERR;
 362     if (!m_addr)
 363         return NULL;
 364
 365     // We set m_connected back to false so wxSocketBase will know what to do.
 366 #ifdef __WXMAC__
 367     wxSocketClient::Connect(*m_addr , false );
 368     wxSocketClient::WaitOnConnect(10);
 369
 370     if (!wxSocketClient::IsConnected())
 371         return NULL;
 372 #else
 373     if (!wxProtocol::Connect(*m_addr))
 374         return NULL;
 375 #endif
 376
 377     if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
 378         return NULL;
 379
 380     inp_stream = new wxHTTPStream(this);
 381
 382     if (!GetHeader(wxT("Content-Length")).empty())
 383         inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
 384     else
 385         inp_stream->m_httpsize = (size_t)-1;
 386
 387     inp_stream->m_read_bytes = 0;
 388
 389     Notify(false);
 390     SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);
 391
 392     return inp_stream;
 393 }
 394
 395 #endif // wxUSE_PROTOCOL_HTTP
 396