src/common/http.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/common/http.cpp
// Purpose:     HTTP protocol
// Author:      Guilhem Lavaux
// Modified by: Simo Virokannas (authentication, Dec 2005)
// Created:     August 1997
// RCS-ID:      $Id: http.cpp 44660 2007-03-07 23:07:17Z VZ $
// Copyright:   (c) 1997, 1998 Guilhem Lavaux
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_PROTOCOL_HTTP

#include <stdio.h>
#include <stdlib.h>

#ifndef WX_PRECOMP
    #include "wx/string.h"
    #include "wx/app.h"
#endif

#include "wx/tokenzr.h"
#include "wx/socket.h"
#include "wx/protocol/protocol.h"
#include "wx/url.h"
#include "wx/protocol/http.h"
#include "wx/sckstrm.h"

IMPLEMENT_DYNAMIC_CLASS(wxHTTP, wxProtocol)
IMPLEMENT_PROTOCOL(wxHTTP, wxT("http"), wxT("80"), true)

wxHTTP::wxHTTP()
  : wxProtocol()
{
    m_addr = NULL;
    m_read = false;
    m_proxy_mode = false;
    m_post_buf = wxEmptyString;
    m_http_response = 0;

    SetNotify(wxSOCKET_LOST_FLAG);
}

wxHTTP::~wxHTTP()
{
    ClearHeaders();

    delete m_addr;
}

void wxHTTP::ClearHeaders()
{
  m_headers.clear();
}

wxString wxHTTP::GetContentType()
{
    return GetHeader(wxT("Content-Type"));
}

void wxHTTP::SetProxyMode(bool on)
{
    m_proxy_mode = on;
}

wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
{
    wxHeaderIterator it = m_headers.begin();
    for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
    {
        if ( wxStricmp(it->first, header) == 0 )
            break;
    }

    return it;
}

wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
{
    wxHeaderConstIterator it = m_headers.begin();
    for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
    {
        if ( wxStricmp(it->first, header) == 0 )
            break;
    }

    return it;
}

void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
{
    if (m_read) {
        ClearHeaders();
        m_read = false;
    }

    wxHeaderIterator it = FindHeader(header);
    if (it != m_headers.end())
        it->second = h_data;
    else
        m_headers[header] = h_data;
}

wxString wxHTTP::GetHeader(const wxString& header) const
{
    wxHeaderConstIterator it = FindHeader(header);

    return it == m_headers.end() ? wxGetEmptyString() : it->second;
}

wxString wxHTTP::GenerateAuthString(const wxString& user, const wxString& pass) const
{
    static const char *base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    wxString buf;
    wxString toencode;

    buf.Printf(wxT("Basic "));

    toencode.Printf(wxT("%s:%s"),user.c_str(),pass.c_str());

    size_t len = toencode.length();
    const wxChar *from = toencode.c_str();
    while (len >= 3) { // encode full blocks first
        buf << wxString::Format(wxT("%c%c"), base64[(from[0] >> 2) & 0x3f], base64[((from[0] << 4) & 0x30) | ((from[1] >> 4) & 0xf)]);
        buf << wxString::Format(wxT("%c%c"), base64[((from[1] << 2) & 0x3c) | ((from[2] >> 6) & 0x3)], base64[from[2] & 0x3f]);
        from += 3;
        len -= 3;
    }
    if (len > 0) { // pad the remaining characters
        buf << wxString::Format(wxT("%c"), base64[(from[0] >> 2) & 0x3f]);
        if (len == 1) {
            buf << wxString::Format(wxT("%c="), base64[(from[0] << 4) & 0x30]);
        } else {
            buf << wxString::Format(wxT("%c%c"), base64[((from[0] << 4) & 0x30) | ((from[1] >> 4) & 0xf)], base64[(from[1] << 2) & 0x3c]);
        }
        buf << wxString::Format(wxT("="));
    }

    return buf;
}

void wxHTTP::SetPostBuffer(const wxString& post_buf)
{
    m_post_buf = post_buf;
}

void wxHTTP::SendHeaders()
{
    typedef wxStringToStringHashMap::iterator iterator;
    wxString buf;

    for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
    {
        buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());

        const wxWX2MBbuf cbuf = buf.mb_str();
        Write(cbuf, strlen(cbuf));
    }
}

bool wxHTTP::ParseHeaders()
{
    wxString line;
    wxStringTokenizer tokenzr;

    ClearHeaders();
    m_read = true;

    for ( ;; )
    {
        m_perr = ReadLine(this, line);
        if (m_perr != wxPROTO_NOERR)
            return false;

        if (line.length() == 0)
            break;

        wxString left_str = line.BeforeFirst(':');
        m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
    }
    return true;
}

bool wxHTTP::Connect(const wxString& host, unsigned short port)
{
    wxIPV4address *addr;

    if (m_addr) {
        delete m_addr;
        m_addr = NULL;
        Close();
    }

    m_addr = addr = new wxIPV4address();

    if (!addr->Hostname(host)) {
        delete m_addr;
        m_addr = NULL;
        m_perr = wxPROTO_NETERR;
        return false;
    }

    if ( port )
        addr->Service(port);
    else if (!addr->Service(wxT("http")))
        addr->Service(80);

    SetHeader(wxT("Host"), host);

    return true;
}

bool wxHTTP::Connect(wxSockAddress& addr, bool WXUNUSED(wait))
{
    if (m_addr) {
        delete m_addr;
        Close();
    }

    m_addr = addr.Clone();

    wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
    if (ipv4addr)
        SetHeader(wxT("Host"), ipv4addr->OrigHostname());

    return true;
}

bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
{
    const wxChar *request;

    switch (req)
    {
        case wxHTTP_GET:
            request = wxT("GET");
            break;

        case wxHTTP_POST:
            request = wxT("POST");
            if ( GetHeader( wxT("Content-Length") ).IsNull() )
                SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
            break;

        default:
            return false;
    }

    m_http_response = 0;

    // If there is no User-Agent defined, define it.
    if (GetHeader(wxT("User-Agent")).IsNull())
        SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));

    // Send authentication information
    if (!m_username.empty() || !m_password.empty()) {
        SetHeader(wxT("Authorization"), GenerateAuthString(m_username, m_password));
    }

    SaveState();

    // we may use non blocking sockets only if we can dispatch events from them
    SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
                                                             : wxSOCKET_BLOCK );
    Notify(false);

    wxString buf;
    buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
    const wxWX2MBbuf pathbuf = wxConvLocal.cWX2MB(buf);
    Write(pathbuf, strlen(wxMBSTRINGCAST pathbuf));
    SendHeaders();
    Write("\r\n", 2);

    if ( req == wxHTTP_POST ) {
        Write(m_post_buf.mbc_str(), m_post_buf.Len());
        m_post_buf = wxEmptyString;
    }

    wxString tmp_str;
    m_perr = ReadLine(this, tmp_str);
    if (m_perr != wxPROTO_NOERR) {
        RestoreState();
        return false;
    }

    if (!tmp_str.Contains(wxT("HTTP/"))) {
        // TODO: support HTTP v0.9 which can have no header.
        // FIXME: tmp_str is not put back in the in-queue of the socket.
        SetHeader(wxT("Content-Length"), wxT("-1"));
        SetHeader(wxT("Content-Type"), wxT("none/none"));
        RestoreState();
        return true;
    }

    wxStringTokenizer token(tmp_str,wxT(' '));
    wxString tmp_str2;
    bool ret_value;

    token.NextToken();
    tmp_str2 = token.NextToken();

    m_http_response = wxAtoi(tmp_str2);

    switch (tmp_str2[0u])
    {
        case wxT('1'):
            /* INFORMATION / SUCCESS */
            break;

        case wxT('2'):
            /* SUCCESS */
            break;

        case wxT('3'):
            /* REDIRECTION */
            break;

        default:
            m_perr = wxPROTO_NOFILE;
            RestoreState();
            return false;
    }

    ret_value = ParseHeaders();
    RestoreState();
    return ret_value;
}

class wxHTTPStream : public wxSocketInputStream
{
public:
    wxHTTP *m_http;
    size_t m_httpsize;
    unsigned long m_read_bytes;

    wxHTTPStream(wxHTTP *http) : wxSocketInputStream(*http), m_http(http) {}
    size_t GetSize() const { return m_httpsize; }
    virtual ~wxHTTPStream(void) { m_http->Abort(); }

protected:
    size_t OnSysRead(void *buffer, size_t bufsize);

    DECLARE_NO_COPY_CLASS(wxHTTPStream)
};

size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
{
    if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
    {
        m_lasterror = wxSTREAM_EOF;
        return 0;
    }

    size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
    m_read_bytes += ret;

    if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
    {
        // if m_httpsize is (size_t) -1 this means read until connection closed
        // which is equivalent to getting a READ_ERROR, for clients however this
        // must be translated into EOF, as it is the expected way of signalling
        // end end of the content
        m_lasterror = wxSTREAM_EOF ;
    }

    return ret;
}

bool wxHTTP::Abort(void)
{
    return wxSocketClient::Close();
}

wxInputStream *wxHTTP::GetInputStream(const wxString& path)
{
    wxHTTPStream *inp_stream;

    wxString new_path;

    m_perr = wxPROTO_CONNERR;
    if (!m_addr)
        return NULL;

    // We set m_connected back to false so wxSocketBase will know what to do.
#ifdef __WXMAC__
    wxSocketClient::Connect(*m_addr , false );
    wxSocketClient::WaitOnConnect(10);

    if (!wxSocketClient::IsConnected())
        return NULL;
#else
    if (!wxProtocol::Connect(*m_addr))
        return NULL;
#endif

    if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
        return NULL;

    inp_stream = new wxHTTPStream(this);

    if (!GetHeader(wxT("Content-Length")).empty())
        inp_stream->m_httpsize = wxAtoi(WXSTRINGCAST GetHeader(wxT("Content-Length")));
    else
        inp_stream->m_httpsize = (size_t)-1;

    inp_stream->m_read_bytes = 0;

    Notify(false);
    SetFlags(wxSOCKET_BLOCK | wxSOCKET_WAITALL);

    return inp_stream;
}

#endif // wxUSE_PROTOCOL_HTTP
1	william	31	/////////////////////////////////////////////////////////////////////////////
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: http.cpp 44660 2007-03-07 23:07:17Z VZ $
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.empty() \|\| !m_password.empty()) {
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