methods/http.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/// $Id: http.h,v 1.12 2002/04/18 05:09:38 jgg Exp $
   3 // $Id: http.h,v 1.12 2002/04/18 05:09:38 jgg Exp $
   4 /* ######################################################################
   5
   6    HTTP Acquire Method - This is the HTTP acquire method for APT.
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10
  11 #ifndef APT_HTTP_H
  12 #define APT_HTTP_H
  13
  14 #include <apt-pkg/strutl.h>
  15 #include <apt-pkg/acquire-method.h>
  16
  17 #include <string>
  18 #include <sys/time.h>
  19 #include <iostream>
  20
  21 #include "server.h"
  22
  23 using std::cout;
  24 using std::endl;
  25
  26 class FileFd;
  27 class HttpMethod;
  28 class Hashes;
  29
  30 class CircleBuf
  31 {
  32    unsigned char *Buf;
  33    unsigned long long Size;
  34    unsigned long long InP;
  35    unsigned long long OutP;
  36    std::string OutQueue;
  37    unsigned long long StrPos;
  38    unsigned long long MaxGet;
  39    struct timeval Start;
  40
  41    static unsigned long long BwReadLimit;
  42    static unsigned long long BwTickReadData;
  43    static struct timeval BwReadTick;
  44    static const unsigned int BW_HZ;
  45
  46    unsigned long long LeftRead() const
  47    {
  48       unsigned long long Sz = Size - (InP - OutP);
  49       if (Sz > Size - (InP%Size))
  50          Sz = Size - (InP%Size);
  51       return Sz;
  52    }
  53    unsigned long long LeftWrite() const
  54    {
  55       unsigned long long Sz = InP - OutP;
  56       if (InP > MaxGet)
  57          Sz = MaxGet - OutP;
  58       if (Sz > Size - (OutP%Size))
  59          Sz = Size - (OutP%Size);
  60       return Sz;
  61    }
  62    void FillOut();
  63
  64    public:
  65    Hashes *Hash;
  66
  67    // Read data in
  68    bool Read(int Fd);
  69    bool Read(std::string Data);
  70
  71    // Write data out
  72    bool Write(int Fd);
  73    bool WriteTillEl(std::string &Data,bool Single = false);
  74
  75    // Control the write limit
  76    void Limit(long long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
  77    bool IsLimit() const {return MaxGet == OutP;};
  78    void Print() const {cout << MaxGet << ',' << OutP << endl;};
  79
  80    // Test for free space in the buffer
  81    bool ReadSpace() const {return Size - (InP - OutP) > 0;};
  82    bool WriteSpace() const {return InP - OutP > 0;};
  83
  84    // Dump everything
  85    void Reset();
  86    void Stats();
  87
  88    CircleBuf(unsigned long long Size);
  89    ~CircleBuf();
  90 };
  91
  92 struct HttpServerState: public ServerState
  93 {
  94    // This is the connection itself. Output is data FROM the server
  95    CircleBuf In;
  96    CircleBuf Out;
  97    int ServerFd;
  98
  99    protected:
 100    virtual bool ReadHeaderLines(std::string &Data);
 101    virtual bool LoadNextResponse(bool const ToFile, FileFd * const File);
 102    virtual bool WriteResponse(std::string const &Data);
 103
 104    public:
 105    virtual void Reset() { ServerState::Reset(); ServerFd = -1; };
 106
 107    virtual bool RunData(FileFd * const File);
 108
 109    virtual bool Open();
 110    virtual bool IsOpen();
 111    virtual bool Close();
 112    virtual bool InitHashes(FileFd &File);
 113    virtual Hashes * GetHashes();
 114    virtual bool Die(FileFd &File);
 115    virtual bool Flush(FileFd * const File);
 116    virtual bool Go(bool ToFile, FileFd * const File);
 117
 118    HttpServerState(URI Srv, HttpMethod *Owner);
 119    virtual ~HttpServerState() {Close();};
 120 };
 121
 122 class HttpMethod : public ServerMethod
 123 {
 124    public:
 125    virtual void SendReq(FetchItem *Itm);
 126
 127    virtual bool Configuration(std::string Message);
 128
 129    virtual ServerState * CreateServerState(URI uri);
 130    virtual void RotateDNS();
 131
 132    protected:
 133    std::string AutoDetectProxyCmd;
 134
 135    public:
 136    friend struct HttpServerState;
 137
 138    HttpMethod() : ServerMethod("1.2",Pipeline | SendConfig)
 139    {
 140       File = 0;
 141       Server = 0;
 142    };
 143 };
 144
 145 #endif