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    // total amount of data that got written so far
  67    unsigned long long TotalWriten;
  68
  69    // Read data in
  70    bool Read(int Fd);
  71    bool Read(std::string Data);
  72
  73    // Write data out
  74    bool Write(int Fd);
  75    bool WriteTillEl(std::string &Data,bool Single = false);
  76
  77    // Control the write limit
  78    void Limit(long long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
  79    bool IsLimit() const {return MaxGet == OutP;};
  80    void Print() const {cout << MaxGet << ',' << OutP << endl;};
  81
  82    // Test for free space in the buffer
  83    bool ReadSpace() const {return Size - (InP - OutP) > 0;};
  84    bool WriteSpace() const {return InP - OutP > 0;};
  85
  86    void Reset();
  87    // Dump everything
  88    void Stats();
  89
  90    CircleBuf(unsigned long long Size);
  91    ~CircleBuf();
  92 };
  93
  94 struct HttpServerState: public ServerState
  95 {
  96    // This is the connection itself. Output is data FROM the server
  97    CircleBuf In;
  98    CircleBuf Out;
  99    int ServerFd;
 100
 101    protected:
 102    virtual bool ReadHeaderLines(std::string &Data);
 103    virtual bool LoadNextResponse(bool const ToFile, FileFd * const File);
 104    virtual bool WriteResponse(std::string const &Data);
 105
 106    public:
 107    virtual void Reset() { ServerState::Reset(); ServerFd = -1; };
 108
 109    virtual bool RunData(FileFd * const File);
 110
 111    virtual bool Open();
 112    virtual bool IsOpen();
 113    virtual bool Close();
 114    virtual bool InitHashes(HashStringList const &ExpectedHashes);
 115    virtual Hashes * GetHashes();
 116    virtual bool Die(FileFd &File);
 117    virtual bool Flush(FileFd * const File);
 118    virtual bool Go(bool ToFile, FileFd * const File);
 119
 120    HttpServerState(URI Srv, HttpMethod *Owner);
 121    virtual ~HttpServerState() {Close();};
 122 };
 123
 124 class HttpMethod : public ServerMethod
 125 {
 126    public:
 127    virtual void SendReq(FetchItem *Itm);
 128
 129    virtual bool Configuration(std::string Message);
 130
 131    virtual ServerState * CreateServerState(URI uri);
 132    virtual void RotateDNS();
 133
 134    protected:
 135    std::string AutoDetectProxyCmd;
 136
 137    public:
 138    friend struct HttpServerState;
 139
 140    HttpMethod() : ServerMethod("1.2",Pipeline | SendConfig)
 141    {
 142       File = 0;
 143       Server = 0;
 144    };
 145 };
 146
 147 #endif