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:      $Id$
// 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"
#include "wx/thread.h"


// ----------------------------------------------------------------------------
// wxHTTP
// ----------------------------------------------------------------------------

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() const
{
    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 ( header.CmpNoCase(it->first) == 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 ( header.CmpNoCase(it->first) == 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 << 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_lastError = ReadLine(this, line);
        if (m_lastError != 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_lastError = wxPROTO_NETERR;
        return false;
    }

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

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

    m_lastError = wxPROTO_NOERR;
    return true;
}

bool wxHTTP::Connect(const 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());

    m_lastError = wxPROTO_NOERR;
    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 = buf.mb_str();
    Write(pathbuf, strlen(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_lastError = ReadLine(this, tmp_str);
    if (m_lastError != 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.
        m_lastError = wxPROTO_NOERR;
        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].GetValue() )
    {
        case wxT('1'):
            /* INFORMATION / SUCCESS */
            break;

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

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

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

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

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

// ----------------------------------------------------------------------------
// wxHTTPStream and wxHTTP::GetInputStream
// ----------------------------------------------------------------------------

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);

    wxDECLARE_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;
}

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

    wxString new_path;

    m_lastError = wxPROTO_CONNERR;  // all following returns share this type of error
    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(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);

    // no error; reset m_lastError
    m_lastError = wxPROTO_NOERR;
    return inp_stream;
}

#endif // wxUSE_PROTOCOL_HTTP
Commit	Line	Data
	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_post_buf = wxEmptyString;
	52	m_http_response = 0;
	53
	54	SetNotify(wxSOCKET_LOST_FLAG);
	55	}
	56
	57	wxHTTP::~wxHTTP()
	58	{
	59	ClearHeaders();
	60
	61	delete m_addr;
	62	}
	63
	64	void wxHTTP::ClearHeaders()
	65	{
	66	m_headers.clear();
	67	}
	68
	69	wxString wxHTTP::GetContentType() const
	70	{
	71	return GetHeader(wxT("Content-Type"));
	72	}
	73
	74	void wxHTTP::SetProxyMode(bool on)
	75	{
	76	m_proxy_mode = on;
	77	}
	78
	79	wxHTTP::wxHeaderIterator wxHTTP::FindHeader(const wxString& header)
	80	{
	81	wxHeaderIterator it = m_headers.begin();
	82	for ( wxHeaderIterator en = m_headers.end(); it != en; ++it )
	83	{
	84	if ( header.CmpNoCase(it->first) == 0 )
	85	break;
	86	}
	87
	88	return it;
	89	}
	90
	91	wxHTTP::wxHeaderConstIterator wxHTTP::FindHeader(const wxString& header) const
	92	{
	93	wxHeaderConstIterator it = m_headers.begin();
	94	for ( wxHeaderConstIterator en = m_headers.end(); it != en; ++it )
	95	{
	96	if ( header.CmpNoCase(it->first) == 0 )
	97	break;
	98	}
	99
	100	return it;
	101	}
	102
	103	void wxHTTP::SetHeader(const wxString& header, const wxString& h_data)
	104	{
	105	if (m_read) {
	106	ClearHeaders();
	107	m_read = false;
	108	}
	109
	110	wxHeaderIterator it = FindHeader(header);
	111	if (it != m_headers.end())
	112	it->second = h_data;
	113	else
	114	m_headers[header] = h_data;
	115	}
	116
	117	wxString wxHTTP::GetHeader(const wxString& header) const
	118	{
	119	wxHeaderConstIterator it = FindHeader(header);
	120
	121	return it == m_headers.end() ? wxGetEmptyString() : it->second;
	122	}
	123
	124	wxString wxHTTP::GenerateAuthString(const wxString& user, const wxString& pass) const
	125	{
	126	static const char *base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	127
	128	wxString buf;
	129	wxString toencode;
	130
	131	buf.Printf(wxT("Basic "));
	132
	133	toencode.Printf(wxT("%s:%s"),user.c_str(),pass.c_str());
	134
	135	size_t len = toencode.length();
	136	const wxChar *from = toencode.c_str();
	137	while (len >= 3) { // encode full blocks first
	138	buf << wxString::Format(wxT("%c%c"), base64[(from[0] >> 2) & 0x3f], base64[((from[0] << 4) & 0x30) \| ((from[1] >> 4) & 0xf)]);
	139	buf << wxString::Format(wxT("%c%c"), base64[((from[1] << 2) & 0x3c) \| ((from[2] >> 6) & 0x3)], base64[from[2] & 0x3f]);
	140	from += 3;
	141	len -= 3;
	142	}
	143	if (len > 0) { // pad the remaining characters
	144	buf << wxString::Format(wxT("%c"), base64[(from[0] >> 2) & 0x3f]);
	145	if (len == 1) {
	146	buf << wxString::Format(wxT("%c="), base64[(from[0] << 4) & 0x30]);
	147	} else {
	148	buf << wxString::Format(wxT("%c%c"), base64[((from[0] << 4) & 0x30) \| ((from[1] >> 4) & 0xf)], base64[(from[1] << 2) & 0x3c]);
	149	}
	150	buf << wxT("=");
	151	}
	152
	153	return buf;
	154	}
	155
	156	void wxHTTP::SetPostBuffer(const wxString& post_buf)
	157	{
	158	m_post_buf = post_buf;
	159	}
	160
	161	void wxHTTP::SendHeaders()
	162	{
	163	typedef wxStringToStringHashMap::iterator iterator;
	164	wxString buf;
	165
	166	for (iterator it = m_headers.begin(), en = m_headers.end(); it != en; ++it )
	167	{
	168	buf.Printf(wxT("%s: %s\r\n"), it->first.c_str(), it->second.c_str());
	169
	170	const wxWX2MBbuf cbuf = buf.mb_str();
	171	Write(cbuf, strlen(cbuf));
	172	}
	173	}
	174
	175	bool wxHTTP::ParseHeaders()
	176	{
	177	wxString line;
	178	wxStringTokenizer tokenzr;
	179
	180	ClearHeaders();
	181	m_read = true;
	182
	183	for ( ;; )
	184	{
	185	m_lastError = ReadLine(this, line);
	186	if (m_lastError != wxPROTO_NOERR)
	187	return false;
	188
	189	if (line.length() == 0)
	190	break;
	191
	192	wxString left_str = line.BeforeFirst(':');
	193	m_headers[left_str] = line.AfterFirst(':').Strip(wxString::both);
	194	}
	195	return true;
	196	}
	197
	198	bool wxHTTP::Connect(const wxString& host, unsigned short port)
	199	{
	200	wxIPV4address *addr;
	201
	202	if (m_addr) {
	203	delete m_addr;
	204	m_addr = NULL;
	205	Close();
	206	}
	207
	208	m_addr = addr = new wxIPV4address();
	209
	210	if (!addr->Hostname(host)) {
	211	delete m_addr;
	212	m_addr = NULL;
	213	m_lastError = wxPROTO_NETERR;
	214	return false;
	215	}
	216
	217	if ( port )
	218	addr->Service(port);
	219	else if (!addr->Service(wxT("http")))
	220	addr->Service(80);
	221
	222	SetHeader(wxT("Host"), host);
	223
	224	m_lastError = wxPROTO_NOERR;
	225	return true;
	226	}
	227
	228	bool wxHTTP::Connect(const wxSockAddress& addr, bool WXUNUSED(wait))
	229	{
	230	if (m_addr) {
	231	delete m_addr;
	232	Close();
	233	}
	234
	235	m_addr = addr.Clone();
	236
	237	wxIPV4address *ipv4addr = wxDynamicCast(&addr, wxIPV4address);
	238	if (ipv4addr)
	239	SetHeader(wxT("Host"), ipv4addr->OrigHostname());
	240
	241	m_lastError = wxPROTO_NOERR;
	242	return true;
	243	}
	244
	245	bool wxHTTP::BuildRequest(const wxString& path, wxHTTP_Req req)
	246	{
	247	const wxChar *request;
	248
	249	switch (req)
	250	{
	251	case wxHTTP_GET:
	252	request = wxT("GET");
	253	break;
	254
	255	case wxHTTP_POST:
	256	request = wxT("POST");
	257	if ( GetHeader( wxT("Content-Length") ).IsNull() )
	258	SetHeader( wxT("Content-Length"), wxString::Format( wxT("%lu"), (unsigned long)m_post_buf.Len() ) );
	259	break;
	260
	261	default:
	262	return false;
	263	}
	264
	265	m_http_response = 0;
	266
	267	// If there is no User-Agent defined, define it.
	268	if (GetHeader(wxT("User-Agent")).IsNull())
	269	SetHeader(wxT("User-Agent"), wxT("wxWidgets 2.x"));
	270
	271	// Send authentication information
	272	if (!m_username.empty() \|\| !m_password.empty()) {
	273	SetHeader(wxT("Authorization"), GenerateAuthString(m_username, m_password));
	274	}
	275
	276	SaveState();
	277
	278	// we may use non blocking sockets only if we can dispatch events from them
	279	SetFlags( wxIsMainThread() && wxApp::IsMainLoopRunning() ? wxSOCKET_NONE
	280	: wxSOCKET_BLOCK );
	281	Notify(false);
	282
	283	wxString buf;
	284	buf.Printf(wxT("%s %s HTTP/1.0\r\n"), request, path.c_str());
	285	const wxWX2MBbuf pathbuf = buf.mb_str();
	286	Write(pathbuf, strlen(pathbuf));
	287	SendHeaders();
	288	Write("\r\n", 2);
	289
	290	if ( req == wxHTTP_POST ) {
	291	Write(m_post_buf.mbc_str(), m_post_buf.Len());
	292	m_post_buf = wxEmptyString;
	293	}
	294
	295	wxString tmp_str;
	296	m_lastError = ReadLine(this, tmp_str);
	297	if (m_lastError != wxPROTO_NOERR) {
	298	RestoreState();
	299	return false;
	300	}
	301
	302	if (!tmp_str.Contains(wxT("HTTP/"))) {
	303	// TODO: support HTTP v0.9 which can have no header.
	304	// FIXME: tmp_str is not put back in the in-queue of the socket.
	305	m_lastError = wxPROTO_NOERR;
	306	SetHeader(wxT("Content-Length"), wxT("-1"));
	307	SetHeader(wxT("Content-Type"), wxT("none/none"));
	308	RestoreState();
	309	return true;
	310	}
	311
	312	wxStringTokenizer token(tmp_str,wxT(' '));
	313	wxString tmp_str2;
	314	bool ret_value;
	315
	316	token.NextToken();
	317	tmp_str2 = token.NextToken();
	318
	319	m_http_response = wxAtoi(tmp_str2);
	320
	321	switch ( tmp_str2[0u].GetValue() )
	322	{
	323	case wxT('1'):
	324	/* INFORMATION / SUCCESS */
	325	break;
	326
	327	case wxT('2'):
	328	/* SUCCESS */
	329	break;
	330
	331	case wxT('3'):
	332	/* REDIRECTION */
	333	break;
	334
	335	default:
	336	m_lastError = wxPROTO_NOFILE;
	337	RestoreState();
	338	return false;
	339	}
	340
	341	m_lastError = wxPROTO_NOERR;
	342	ret_value = ParseHeaders();
	343	RestoreState();
	344	return ret_value;
	345	}
	346
	347	bool wxHTTP::Abort(void)
	348	{
	349	return wxSocketClient::Close();
	350	}
	351
	352	// ----------------------------------------------------------------------------
	353	// wxHTTPStream and wxHTTP::GetInputStream
	354	// ----------------------------------------------------------------------------
	355
	356	class wxHTTPStream : public wxSocketInputStream
	357	{
	358	public:
	359	wxHTTP *m_http;
	360	size_t m_httpsize;
	361	unsigned long m_read_bytes;
	362
	363	wxHTTPStream(wxHTTP http) : wxSocketInputStream(http), m_http(http) {}
	364	size_t GetSize() const { return m_httpsize; }
	365	virtual ~wxHTTPStream(void) { m_http->Abort(); }
	366
	367	protected:
	368	size_t OnSysRead(void *buffer, size_t bufsize);
	369
	370	wxDECLARE_NO_COPY_CLASS(wxHTTPStream);
	371	};
	372
	373	size_t wxHTTPStream::OnSysRead(void *buffer, size_t bufsize)
	374	{
	375	if (m_httpsize > 0 && m_read_bytes >= m_httpsize)
	376	{
	377	m_lasterror = wxSTREAM_EOF;
	378	return 0;
	379	}
	380
	381	size_t ret = wxSocketInputStream::OnSysRead(buffer, bufsize);
	382	m_read_bytes += ret;
	383
	384	if (m_httpsize==(size_t)-1 && m_lasterror == wxSTREAM_READ_ERROR )
	385	{
	386	// if m_httpsize is (size_t) -1 this means read until connection closed
	387	// which is equivalent to getting a READ_ERROR, for clients however this
	388	// must be translated into EOF, as it is the expected way of signalling
	389	// end end of the content
	390	m_lasterror = wxSTREAM_EOF;
	391	}
	392
	393	return ret;
	394	}
	395
	396	wxInputStream *wxHTTP::GetInputStream(const wxString& path)
	397	{
	398	wxHTTPStream *inp_stream;
	399
	400	wxString new_path;
	401
	402	m_lastError = wxPROTO_CONNERR; // all following returns share this type of error
	403	if (!m_addr)
	404	return NULL;
	405
	406	// We set m_connected back to false so wxSocketBase will know what to do.
	407	#ifdef __WXMAC__
	408	wxSocketClient::Connect(*m_addr , false );
	409	wxSocketClient::WaitOnConnect(10);
	410
	411	if (!wxSocketClient::IsConnected())
	412	return NULL;
	413	#else
	414	if (!wxProtocol::Connect(*m_addr))
	415	return NULL;
	416	#endif
	417
	418	if (!BuildRequest(path, m_post_buf.empty() ? wxHTTP_GET : wxHTTP_POST))
	419	return NULL;
	420
	421	inp_stream = new wxHTTPStream(this);
	422
	423	if (!GetHeader(wxT("Content-Length")).empty())
	424	inp_stream->m_httpsize = wxAtoi(GetHeader(wxT("Content-Length")));
	425	else
	426	inp_stream->m_httpsize = (size_t)-1;
	427
	428	inp_stream->m_read_bytes = 0;
	429
	430	Notify(false);
	431	SetFlags(wxSOCKET_BLOCK \| wxSOCKET_WAITALL);
	432
	433	// no error; reset m_lastError
	434	m_lastError = wxPROTO_NOERR;
	435	return inp_stream;
	436	}
	437
	438	#endif // wxUSE_PROTOCOL_HTTP