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528b2c61 | 1 | |
2 | /* | |
62e76326 | 3 | * $Id: HttpHeaderRange.h,v 1.2 2003/02/21 22:50:05 robertc Exp $ |
528b2c61 | 4 | * |
5 | * | |
6 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
7 | * ---------------------------------------------------------- | |
8 | * | |
9 | * Squid is the result of efforts by numerous individuals from | |
10 | * the Internet community; see the CONTRIBUTORS file for full | |
11 | * details. Many organizations have provided support for Squid's | |
12 | * development; see the SPONSORS file for full details. Squid is | |
13 | * Copyrighted (C) 2001 by the Regents of the University of | |
14 | * California; see the COPYRIGHT file for full details. Squid | |
15 | * incorporates software developed and/or copyrighted by other | |
16 | * sources; see the CREDITS file for full details. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2 of the License, or | |
21 | * (at your option) any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
31 | * | |
32 | */ | |
33 | ||
34 | #ifndef SQUID_HTTPHEADERRANGE_H | |
35 | #define SQUID_HTTPHEADERRANGE_H | |
36 | ||
37 | #include "Range.h" | |
38 | ||
39 | typedef struct _HttpReply HttpReply; | |
40 | /* http byte-range-spec */ | |
62e76326 | 41 | |
42 | class HttpHdrRangeSpec | |
43 | { | |
44 | ||
45 | public: | |
528b2c61 | 46 | void *operator new(size_t); |
47 | void operator delete (void *); | |
48 | void deleteSelf() const; | |
49 | typedef Range<ssize_t> HttpRange; | |
50 | static ssize_t const UnknownPosition; | |
62e76326 | 51 | |
528b2c61 | 52 | HttpHdrRangeSpec(); |
53 | static HttpHdrRangeSpec *Create(const char *field, int fieldLen); | |
54 | ||
55 | bool parseInit(const char *field, int flen); | |
56 | int canonize(size_t clen); | |
57 | void outputInfo( char const *note) const; | |
58 | void packInto(Packer * p) const; | |
59 | bool mergeWith(const HttpHdrRangeSpec * donor); | |
60 | ssize_t offset; | |
61 | ssize_t length; | |
62e76326 | 62 | |
528b2c61 | 63 | private: |
64 | static MemPool *Pool; | |
65 | }; | |
66 | ||
67 | /* There may be more than one byte range specified in the request. | |
68 | * This object holds all range specs in order of their appearence | |
69 | * in the request because we SHOULD preserve that order. | |
70 | */ | |
62e76326 | 71 | |
72 | class HttpHdrRange | |
73 | { | |
74 | ||
528b2c61 | 75 | public: |
76 | void *operator new(size_t); | |
77 | void operator delete (void *); | |
78 | void deleteSelf() const; | |
79 | ||
80 | static size_t ParsedCount; | |
81 | /* Http Range Header Field */ | |
82 | static HttpHdrRange *ParseCreate(const String * range_spec); | |
83 | ||
84 | HttpHdrRange(); | |
85 | HttpHdrRange(HttpHdrRange const &); | |
86 | ~HttpHdrRange(); | |
87 | HttpHdrRange &operator= (HttpHdrRange const &); | |
88 | ||
89 | typedef Vector<HttpHdrRangeSpec *>::iterator iterator; | |
90 | typedef Vector<HttpHdrRangeSpec *>::const_iterator const_iterator; | |
91 | iterator begin(); | |
92 | const_iterator begin () const; | |
93 | iterator end(); | |
94 | const_iterator end() const; | |
62e76326 | 95 | |
528b2c61 | 96 | /* adjust specs after the length is known */ |
97 | int canonize(size_t); | |
98 | int canonize(HttpReply *rep); | |
99 | /* returns true if ranges are valid; inits HttpHdrRange */ | |
100 | bool parseInit(const String * range_spec); | |
101 | void packInto(Packer * p) const; | |
102 | /* other */ | |
103 | bool isComplex() const; | |
104 | bool willBeComplex() const; | |
105 | ssize_t firstOffset() const; | |
106 | ssize_t lowestOffset(ssize_t) const; | |
107 | bool offsetLimitExceeded() const; | |
108 | Vector<HttpHdrRangeSpec *> specs; | |
62e76326 | 109 | |
528b2c61 | 110 | private: |
111 | static MemPool *Pool; | |
112 | void getCanonizedSpecs (Vector<HttpHdrRangeSpec *> ©); | |
113 | void merge (Vector<HttpHdrRangeSpec *> &basis); | |
114 | ssize_t clen; | |
115 | }; | |
116 | ||
117 | /* data for iterating thru range specs */ | |
62e76326 | 118 | |
119 | class HttpHdrRangeIter | |
120 | { | |
121 | ||
122 | public: | |
528b2c61 | 123 | HttpHdrRange::iterator pos; |
124 | const HttpHdrRangeSpec *currentSpec() const; | |
125 | void updateSpec(); | |
126 | ssize_t debt() const; | |
127 | void debt(ssize_t); | |
128 | ssize_t debt_size; /* bytes left to send from the current spec */ | |
129 | String boundary; /* boundary for multipart responses */ | |
130 | bool valid; | |
131 | }; | |
62e76326 | 132 | |
528b2c61 | 133 | #endif /* SQUID_HTTPHEADERRANGE_H */ |