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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/// $Id: http.h,v 1.12 2002/04/18 05:09:38 jgg Exp $
// $Id: http.h,v 1.12 2002/04/18 05:09:38 jgg Exp $
/* ######################################################################
HTTP Acquire Method - This is the HTTP aquire method for APT.
##################################################################### */
/*}}}*/
#ifndef APT_HTTP_H
#define APT_HTTP_H
#define MAXLEN 360
#include <apt-pkg/hashes.h>
using std::cout;
using std::endl;
class HttpMethod;
class CircleBuf
{
unsigned char *Buf;
unsigned long Size;
unsigned long InP;
unsigned long OutP;
string OutQueue;
unsigned long StrPos;
unsigned long MaxGet;
struct timeval Start;
static unsigned long BwReadLimit;
static unsigned long BwTickReadData;
static struct timeval BwReadTick;
static const unsigned int BW_HZ;
unsigned long LeftRead()
{
unsigned long Sz = Size - (InP - OutP);
if (Sz > Size - (InP%Size))
Sz = Size - (InP%Size);
return Sz;
}
unsigned long LeftWrite()
{
unsigned long Sz = InP - OutP;
if (InP > MaxGet)
Sz = MaxGet - OutP;
if (Sz > Size - (OutP%Size))
Sz = Size - (OutP%Size);
return Sz;
}
void FillOut();
public:
Hashes *Hash;
// Read data in
bool Read(int Fd);
bool Read(string Data);
// Write data out
bool Write(int Fd);
bool WriteTillEl(string &Data,bool Single = false);
// Control the write limit
void Limit(long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
bool IsLimit() {return MaxGet == OutP;};
void Print() {cout << MaxGet << ',' << OutP << endl;};
// Test for free space in the buffer
bool ReadSpace() {return Size - (InP - OutP) > 0;};
bool WriteSpace() {return InP - OutP > 0;};
// Dump everything
void Reset();
void Stats();
CircleBuf(unsigned long Size);
~CircleBuf() {delete [] Buf; delete Hash;};
};
struct ServerState
{
// This is the last parsed Header Line
unsigned int Major;
unsigned int Minor;
unsigned int Result;
char Code[MAXLEN];
// These are some statistics from the last parsed header lines
unsigned long Size;
signed long StartPos;
time_t Date;
bool HaveContent;
enum {Chunked,Stream,Closes} Encoding;
enum {Header, Data} State;
bool Persistent;
string Location;
// This is a Persistent attribute of the server itself.
bool Pipeline;
HttpMethod *Owner;
// This is the connection itself. Output is data FROM the server
CircleBuf In;
CircleBuf Out;
int ServerFd;
URI ServerName;
bool HeaderLine(string Line);
bool Comp(URI Other) {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
void Reset() {Major = 0; Minor = 0; Result = 0; Size = 0; StartPos = 0;
Encoding = Closes; time(&Date); ServerFd = -1;
Pipeline = true;};
/** \brief Result of the header acquire */
enum RunHeadersResult {
/** \brief Header ok */
RUN_HEADERS_OK,
/** \brief IO error while retrieving */
RUN_HEADERS_IO_ERROR,
/** \brief Parse error after retrieving */
RUN_HEADERS_PARSE_ERROR,
};
/** \brief Get the headers before the data */
RunHeadersResult RunHeaders();
/** \brief Transfer the data from the socket */
bool RunData();
bool Open();
bool Close();
ServerState(URI Srv,HttpMethod *Owner);
~ServerState() {Close();};
};
class HttpMethod : public pkgAcqMethod
{
void SendReq(FetchItem *Itm,CircleBuf &Out);
bool Go(bool ToFile,ServerState *Srv);
bool Flush(ServerState *Srv);
bool ServerDie(ServerState *Srv);
/** \brief Result of the header parsing */
enum DealWithHeadersResult {
/** \brief The file is open and ready */
FILE_IS_OPEN,
/** \brief We got a IMS hit, the file has not changed */
IMS_HIT,
/** \brief The server reported a unrecoverable error */
ERROR_UNRECOVERABLE,
/** \brief The server reported a error with a error content page */
ERROR_WITH_CONTENT_PAGE,
/** \brief A error on the client side */
ERROR_NOT_FROM_SERVER,
/** \brief A redirect or retry request */
TRY_AGAIN_OR_REDIRECT
};
/** \brief Handle the retrieved header data */
DealWithHeadersResult DealWithHeaders(FetchResult &Res,ServerState *Srv);
/** \brief Try to AutoDetect the proxy */
bool AutoDetectProxy();
virtual bool Configuration(string Message);
// In the event of a fatal signal this file will be closed and timestamped.
static string FailFile;
static int FailFd;
static time_t FailTime;
static void SigTerm(int);
protected:
virtual bool Fetch(FetchItem *);
string NextURI;
string AutoDetectProxyCmd;
public:
friend class ServerState;
FileFd *File;
ServerState *Server;
int Loop();
HttpMethod() : pkgAcqMethod("1.2",Pipeline | SendConfig)
{
File = 0;
Server = 0;
};
};
#endif
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