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comparison asyncdreactor/protocol/http11_parser.rl @ 11:5836613d16ac

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reorg! reorg!
author rick@minifunk
date Tue, 12 Aug 2008 16:59:56 -0400
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10:e75a2e506b1d 11:5836613d16ac
1 /**
2 * Copyright (c) 2005 Zed A. Shaw,
3 * Modified for D/DReactor by Rick Richardson, 2008
4 * You can redistribute it and/or modify it under the same terms as Ruby.
5 */
6
7 alias void delegate (void *data, const char *at, size_t length) element_cb;
8 alias void delegate (void *data, const char *field, size_t flen, const char *value, size_t vlen) field_cb;
9
10 class Http11Parser
11 {
12 int cs;
13 size_t body_start;
14 int content_len;
15 size_t nread;
16 size_t mark;
17 size_t field_start;
18 size_t field_len;
19 size_t query_start;
20
21 void *data;
22
23 field_cb http_field;
24 element_cb request_method;
25 element_cb request_uri;
26 element_cb fragment;
27 element_cb request_path;
28 element_cb query_string;
29 element_cb http_version;
30 element_cb header_done;
31
32 /*
33 * capitalizes all lower-case ASCII characters,
34 * converts dashes to underscores.
35 */
36 private void snake_upcase_char(char *c)
37 {
38 if (*c >= 'a' && *c <= 'z')
39 *c &= ~0x20;
40 else if (*c == '-')
41 *c = '_';
42 }
43
44 //#define LEN(AT, FPC) (FPC - buffer - parser->AT)
45 private int LEN(char* at, char* fpc)
46 {
47 return (fpc - buffer.ptr - at);
48 }
49
50 //#define MARK(M,FPC) (parser->M = (FPC) - buffer)
51 private void MARK(size_t* item, char* fpc)
52 {
53 *item = fpc - buffer.ptr;
54 }
55
56 //#define PTR_TO(F) (buffer + parser->F)
57 private char* PTR_TO(size_t F)
58 {
59 return (buffer.ptr + F);
60 }
61 /** Machine **/
62
63 %%{
64
65 machine http_parser;
66
67 action mark {MARK(mark, fpc); }
68
69
70 action start_field { MARK(field_start, fpc); }
71 action snake_upcase_field { snake_upcase_char((char *)fpc); }
72 action write_field {
73 field_len = LEN(field_start, fpc);
74 }
75
76 action start_value { MARK(mark, fpc); }
77 action write_value {
78 if(http_field)
79 http_field(data,
80 PTR_TO(field_start),
81 field_len,
82 PTR_TO(mark),
83 LEN(mark, fpc));
84 }
85 action request_method {
86 if(request_method)
87 request_method(data, PTR_TO(mark), LEN(mark, fpc));
88 }
89
90 action request_uri {
91 if(request_uri)
92 request_uri(data, PTR_TO(mark), LEN(mark, fpc));
93 }
94
95 action fragment {
96 if(fragment)
97 fragment(data, PTR_TO(mark), LEN(mark, fpc));
98 }
99
100 action start_query {MARK(query_start, fpc); }
101
102 action query_string {
103 if(query_string)
104 query_string(data, PTR_TO(query_start), LEN(query_start, fpc));
105 }
106
107 action http_version {
108 if(http_version)
109 http_version(data, PTR_TO(mark), LEN(mark, fpc));
110 }
111
112 action request_path {
113 if(request_path)
114 request_path(data, PTR_TO(mark), LEN(mark,fpc));
115 }
116
117 action done {
118 body_start = fpc - buffer + 1;
119 if(header_done)
120 header_done(data, fpc + 1, pe - fpc - 1);
121 fbreak;
122 }
123
124 include http_parser_common "http11_parser_common.rl";
125
126 }%%
127
128 /** Data **/
129 %% write data;
130
131 this ()
132 {
133 cs = 0;
134 %% write init;
135
136 body_start = 0;
137 content_len = 0;
138 mark = 0;
139 nread = 0;
140 field_len = 0;
141 field_start = 0;
142 }
143
144
145 /** exec **/
146 size_t execute(const char[] buffer, size_t off) {
147 const char *p, *pe;
148 int len = buffer.length;
149
150 assert(off <= len && "offset past end of buffer");
151
152 p = buffer.ptr+off;
153 pe = buffer.ptr+len;
154
155 /* assert(*pe == '\0' && "pointer does not end on NUL"); */
156 assert(pe - p == len - off && "pointers aren't same distance");
157
158 %% write exec;
159
160 //parser->cs = cs;
161 nread += p - (buffer.ptr + off);
162
163 assert(p <= pe && "buffer overflow after parsing execute");
164 assert(nread <= len && "nread longer than length");
165 assert(body_start <= len && "body starts after buffer end");
166 assert(mark < len && "mark is after buffer end");
167 assert(field_len <= len && "field has length longer than whole buffer");
168 assert(field_start < len && "field starts after buffer end");
169
170 return(nread);
171 }
172
173 int finish()
174 {
175 if (has_error() ) {
176 return -1;
177 } else if (is_finished() ) {
178 return 1;
179 } else {
180 return 0;
181 }
182 }
183
184 bool has_error() {
185 return cs == http_parser_error;
186 }
187
188 bool is_finished() {
189 return cs >= http_parser_first_final;
190 }
191
192 }