1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Classes dealing with the abstraction of talking to a end via a text
protocol like HTTP (which is used by the http and https methods)
##################################################################### */
/*}}}*/
#ifndef APT_SERVER_H
#define APT_SERVER_H
#include <apt-pkg/strutl.h>
#include <apt-pkg/acquire-method.h>
#include <time.h>
#include <iostream>
#include <string>
using std::cout;
using std::endl;
class Hashes;
class ServerMethod;
class FileFd;
struct ServerState
{
// This is the last parsed Header Line
unsigned int Major;
unsigned int Minor;
unsigned int Result;
char Code[360];
// These are some statistics from the last parsed header lines
unsigned long long Size; // total size of the usable content (aka: the file)
unsigned long long DownloadSize; // size we actually download (can be smaller than Size if we have partial content)
unsigned long long JunkSize; // size of junk content (aka: server error pages)
unsigned long long StartPos;
time_t Date;
bool HaveContent;
enum {Chunked,Stream,Closes} Encoding;
enum {Header, Data} State;
bool Persistent;
std::string Location;
// This is a Persistent attribute of the server itself.
bool Pipeline;
URI ServerName;
URI Proxy;
unsigned long TimeOut;
protected:
ServerMethod *Owner;
virtual bool ReadHeaderLines(std::string &Data) = 0;
virtual bool LoadNextResponse(bool const ToFile, FileFd * const File) = 0;
public:
bool HeaderLine(std::string Line);
/** \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(FileFd * const File, const std::string &Uri);
bool Comp(URI Other) const {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
virtual void Reset() {Major = 0; Minor = 0; Result = 0; Code[0] = '\0'; Size = 0; JunkSize = 0;
StartPos = 0; Encoding = Closes; time(&Date); HaveContent = false;
State = Header; Persistent = false; Pipeline = true;};
virtual bool WriteResponse(std::string const &Data) = 0;
/** \brief Transfer the data from the socket */
virtual bool RunData(FileFd * const File) = 0;
virtual bool Open() = 0;
virtual bool IsOpen() = 0;
virtual bool Close() = 0;
virtual bool InitHashes(FileFd &File) = 0;
virtual Hashes * GetHashes() = 0;
virtual bool Die(FileFd &File) = 0;
virtual bool Flush(FileFd * const File) = 0;
virtual bool Go(bool ToFile, FileFd * const File) = 0;
ServerState(URI Srv, ServerMethod *Owner);
virtual ~ServerState() {};
};
class ServerMethod : public pkgAcqMethod
{
protected:
virtual bool Fetch(FetchItem *);
ServerState *Server;
std::string NextURI;
FileFd *File;
unsigned long PipelineDepth;
bool AllowRedirect;
public:
bool Debug;
/** \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 An 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);
// In the event of a fatal signal this file will be closed and timestamped.
static std::string FailFile;
static int FailFd;
static time_t FailTime;
static APT_NORETURN void SigTerm(int);
virtual bool Configuration(std::string Message);
virtual bool Flush() { return Server->Flush(File); };
int Loop();
virtual void SendReq(FetchItem *Itm) = 0;
virtual ServerState * CreateServerState(URI uri) = 0;
virtual void RotateDNS() = 0;
ServerMethod(const char *Ver,unsigned long Flags = 0) : pkgAcqMethod(Ver, Flags), Server(NULL), File(NULL), PipelineDepth(0), AllowRedirect(false), Debug(false) {};
virtual ~ServerMethod() {};
};
#endif
|
