methods/http.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: http.h,v 1.4 1998/11/11 06:54:22 jgg Exp $
   4 /* ######################################################################
   5
   6    HTTP Aquire Method - This is the HTTP aquire method for APT.
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10
  11 #ifndef APT_HTTP_H
  12 #define APT_HTTP_H
  13
  14 #define MAXLEN 360
  15
  16 class HttpMethod;
  17
  18 class CircleBuf
  19 {
  20    unsigned char *Buf;
  21    unsigned long Size;
  22    unsigned long InP;
  23    unsigned long OutP;
  24    string OutQueue;
  25    unsigned long StrPos;
  26    unsigned long MaxGet;
  27    struct timeval Start;
  28
  29    unsigned long LeftRead()
  30    {
  31       unsigned long Sz = Size - (InP - OutP);
  32       if (Sz > Size - (InP%Size))
  33          Sz = Size - (InP%Size);
  34       return Sz;
  35    }
  36    unsigned long LeftWrite()
  37    {
  38       unsigned long Sz = InP - OutP;
  39       if (InP > MaxGet)
  40          Sz = MaxGet - OutP;
  41       if (Sz > Size - (OutP%Size))
  42          Sz = Size - (OutP%Size);
  43       return Sz;
  44    }
  45    void FillOut();
  46
  47    public:
  48
  49    MD5Summation *MD5;
  50
  51    // Read data in
  52    bool Read(int Fd);
  53    bool Read(string Data);
  54
  55    // Write data out
  56    bool Write(int Fd);
  57    bool WriteTillEl(string &Data,bool Single = false);
  58
  59    // Control the write limit
  60    void Limit(long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}
  61    bool IsLimit() {return MaxGet == OutP;};
  62    void Print() {cout << MaxGet << ',' << OutP << endl;};
  63
  64    // Test for free space in the buffer
  65    bool ReadSpace() {return Size - (InP - OutP) > 0;};
  66    bool WriteSpace() {return InP - OutP > 0;};
  67
  68    // Dump everything
  69    void Reset();
  70    void Stats();
  71
  72    CircleBuf(unsigned long Size);
  73    ~CircleBuf() {delete [] Buf;};
  74 };
  75
  76 struct ServerState
  77 {
  78    // This is the last parsed Header Line
  79    unsigned int Major;
  80    unsigned int Minor;
  81    unsigned int Result;
  82    char Code[MAXLEN];
  83
  84    // These are some statistics from the last parsed header lines
  85    unsigned long Size;
  86    signed long StartPos;
  87    time_t Date;
  88    bool HaveContent;
  89    enum {Chunked,Stream,Closes} Encoding;
  90    enum {Header, Data} State;
  91
  92    HttpMethod *Owner;
  93
  94    // This is the connection itself. Output is data FROM the server
  95    CircleBuf In;
  96    CircleBuf Out;
  97    int ServerFd;
  98    URI ServerName;
  99
 100    bool HeaderLine(string Line);
 101    bool Comp(URI Other) {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
 102    void Reset() {Major = 0; Minor = 0; Result = 0; Size = 0; StartPos = 0;
 103                  Encoding = Closes; time(&Date); ServerFd = -1;};
 104    int RunHeaders();
 105    bool RunData();
 106
 107    bool Open();
 108    bool Close();
 109
 110    ServerState(URI Srv,HttpMethod *Owner);
 111    ~ServerState() {Close();};
 112 };
 113
 114 class HttpMethod : public pkgAcqMethod
 115 {
 116    void SendReq(FetchItem *Itm,CircleBuf &Out);
 117    bool Go(bool ToFile,ServerState *Srv);
 118    bool Flush(ServerState *Srv);
 119    bool ServerDie(ServerState *Srv);
 120    int DealWithHeaders(FetchResult &Res,ServerState *Srv);
 121
 122    // In the event of a fatal signal this file will be closed and timestamped.
 123    static string FailFile;
 124    static int FailFd;
 125    static time_t FailTime;
 126    static void SigTerm(int);
 127
 128    public:
 129    friend ServerState;
 130
 131    int Depth;
 132    FileFd *File;
 133
 134    int Loop();
 135
 136    HttpMethod() : pkgAcqMethod("1.2",Pipeline | SendConfig)
 137    {
 138       Depth = 0;
 139       File = 0;
 140       Depth = 0;
 141    };
 142 };
 143
 144 URI Proxy;
 145
 146 #endif