/*
* lftp - file transfer program
*
* Copyright (c) 1996-2016 by Alexander V. Lukyanov (lav@yars.free.net)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HTTP_H
#define HTTP_H
#include "NetAccess.h"
#include "buffer.h"
#include "lftp_ssl.h"
#include "HttpHeader.h"
#include "HttpAuth.h"
class Http : public NetAccess
{
enum state_t
{
DISCONNECTED,
CONNECTING,
CONNECTED,
RECEIVING_HEADER,
RECEIVING_BODY,
DONE
};
enum tunnel_state_t {
NO_TUNNEL,
TUNNEL_WAITING,
TUNNEL_ESTABLISHED
};
state_t state;
tunnel_state_t tunnel_state;
void Init();
void Send(const xstring& str);
void Send(const char *format,...) PRINTF_LIKE(2,3);
void Send(const HttpHeader *hdr);
class Connection
{
xstring_c closure;
public:
int sock;
SMTaskRef<IOBuffer> send_buf;
SMTaskRef<IOBuffer> recv_buf;
void MakeBuffers();
#if USE_SSL
Ref<lftp_ssl> ssl;
void MakeSSLBuffers();
#endif
void SuspendInternal()
{
if(send_buf) send_buf->SuspendSlave();
if(recv_buf) recv_buf->SuspendSlave();
}
void ResumeInternal()
{
if(send_buf) send_buf->ResumeSlave();
if(recv_buf) recv_buf->ResumeSlave();
}
Connection(int s,const char *c);
~Connection();
};
Ref<Connection> conn;
static void AppendHostEncoded(xstring&,const char *);
void SendMethod(const char *,const char *);
const char *last_method;
xstring_c last_uri;
xstring_c last_url; // for proxy requests
enum { HTTP_NONE=0, HTTP_POST, HTTP_MOVE, HTTP_COPY, HTTP_PROPFIND } special;
xstring special_data;
void DirFile(xstring& path,const xstring& ecwd,const xstring& efile) const;
void SendAuth();
void SendProxyAuth();
void SendCacheControl();
void SendBasicAuth(const char *tag,const char *auth);
void SendBasicAuth(const char *tag,const char *u,const char *p);
void SendRequest(const char *connection,const char *f);
void SendRequest(const char *connection=0)
{
SendRequest(connection,file);
}
int SendArrayInfoRequest(); // returns count of sent requests
void ProceedArrayInfo();
void SendPropfind(const xstring& efile,int depth);
void SendPropfindBody();
static const xstring& FormatLastModified(time_t);
void SendProppatch(const xstring& efile);
int status_code;
void HandleHeaderLine(const char *name,const char *value);
static const xstring& extract_quoted_header_value(const char *value,const char **end=0);
void HandleRedirection();
void GetBetterConnection(int level);
void SetCookie(const char *val);
void MakeCookie(xstring &cookie,const char *host,const char *path);
void CookieMerge(xstring &c,const char *add);
bool CookieClosureMatch(const char *closure,const char *host,const char *path);
void DisconnectLL();
void ResetRequestData();
void MoveConnectionHere(Http *o);
int IsConnected() const
{
if(!conn)
return 0;
if(state==CONNECTING || tunnel_state==TUNNEL_WAITING)
return 1;
return 2;
}
void LogErrorText();
xstring status;
int status_consumed;
int proto_version;
xstring line;
off_t body_size;
off_t bytes_received;
bool sent_eot;
bool ModeSupported();
bool ModeIs(open_mode m) const {
if(m==STORE)
return mode==m && !sending_proppatch;
return mode==m;
}
int keep_alive_max;
bool keep_alive;
int array_send;
bool chunked;
bool chunked_trailer;
long chunk_size;
off_t chunk_pos;
off_t request_pos;
Ref<DirectedBuffer> inflate;
SMTaskRef<IOBuffer> propfind;
xstring_c content_encoding;
static bool IsCompressed(const char *s);
bool CompressedContentEncoding() const;
bool CompressedContentType() const;
bool no_ranges;
bool seen_ranges_bytes;
bool entity_date_set;
bool sending_proppatch;
bool no_cache;
bool no_cache_this;
// for WWW[0] and PROXY[1]
int auth_sent[2];
HttpAuth::scheme_t auth_scheme[2];
void NewAuth(const char *hdr,HttpAuth::target_t target,const char *user,const char *pass);
void SendAuth(HttpAuth::target_t target,const char *user,const char *uri);
xstring_c auth_user;
xstring_c auth_pass;
bool use_propfind_now;
xstring allprop;
long retry_after;
const char *user_agent;
int _Read(Buffer *,int); // does not update pos, rate_limit, retries, does not check state.
void _Skip(int to_skip); // skip in recv_buf or inflate (unless moved), update real_pos
void _UpdatePos(int to_skip); // update real_pos, chunk_pos etc.
protected:
bool hftp; // ftp over http proxy.
bool https; // secure http
bool use_head;
public:
static void ClassInit();
Http();
Http(const Http *);
~Http();
const char *GetProto() const { return "http"; }
FileAccess *Clone() const { return new Http(this); }
static FileAccess *New();
FileSet *ParseLongList(const char *buf,int len,int *err=0) const;
int Do();
int Done();
int Read(Buffer *,int);
int Write(const void *,int);
int StoreStatus();
int SendEOT();
int Buffered();
void ResetLocationData();
void Close();
const char *CurrentStatus();
void Reconfig(const char *name=0);
bool SameSiteAs(const FileAccess *fa) const;
bool SameLocationAs(const FileAccess *fa) const;
DirList *MakeDirList(ArgV *a);
Glob *MakeGlob(const char *pattern);
ListInfo *MakeListInfo(const char *path);
void UseCache(bool use) { no_cache_this=!use; }
bool NeedSizeDateBeforehand() { return true; }
void SuspendInternal();
void ResumeInternal();
static const time_t ATOTM_ERROR = -1;
static time_t atotm (const char *time_string);
};
class HFtp : public Http
{
public:
HFtp();
HFtp(const HFtp *);
~HFtp();
const char *GetProto() const { return "hftp"; }
FileAccess *Clone() const { return new HFtp(this); }
static FileAccess *New();
virtual void Login(const char *,const char *);
virtual void Reconfig(const char *);
};
class Https : public Http
{
public:
Https();
Https(const Https *);
~Https();
const char *GetProto() const { return "https"; }
FileAccess *Clone() const { return new Https(this); }
static FileAccess *New();
};
#endif//HTTP_H