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comparison src/http/modules/proxy/ngx_http_proxy_parse.c @ 170:c42be4185301

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nginx-0.0.1-2003-11-03-01:56:18 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 02 Nov 2003 22:56:18 +0000
parents
children caa57ddf6d77
comparison
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169:edf29bb717da 170:c42be4185301
1
2 #include <ngx_config.h>
3 #include <ngx_core.h>
4 #include <ngx_http.h>
5 #include <ngx_http_proxy_handler.h>
6
7
8 int ngx_http_proxy_parse_status_line(ngx_http_proxy_ctx_t *p)
9 {
10 char ch;
11 char *pos;
12 enum {
13 sw_start = 0,
14 sw_H,
15 sw_HT,
16 sw_HTT,
17 sw_HTTP,
18 sw_first_major_digit,
19 sw_major_digit,
20 sw_first_minor_digit,
21 sw_minor_digit,
22 sw_status,
23 sw_space_after_status,
24 sw_status_text,
25 sw_almost_done,
26 sw_done
27 } state;
28
29 state = p->state;
30 pos = p->header_in->pos;
31
32 while (pos < p->header_in->last && state < sw_done) {
33 ch = *pos++;
34
35 switch (state) {
36
37 /* "HTTP/" */
38 case sw_start:
39 switch (ch) {
40 case 'H':
41 state = sw_H;
42 break;
43 default:
44 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
45 }
46 break;
47
48 case sw_H:
49 switch (ch) {
50 case 'T':
51 state = sw_HT;
52 break;
53 default:
54 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
55 }
56 break;
57
58 case sw_HT:
59 switch (ch) {
60 case 'T':
61 state = sw_HTT;
62 break;
63 default:
64 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
65 }
66 break;
67
68 case sw_HTT:
69 switch (ch) {
70 case 'P':
71 state = sw_HTTP;
72 break;
73 default:
74 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
75 }
76 break;
77
78 case sw_HTTP:
79 switch (ch) {
80 case '/':
81 state = sw_first_major_digit;
82 break;
83 default:
84 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
85 }
86 break;
87
88 /* the first digit of major HTTP version */
89 case sw_first_major_digit:
90 if (ch < '1' || ch > '9') {
91 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
92 }
93
94 state = sw_major_digit;
95 break;
96
97 /* the major HTTP version or dot */
98 case sw_major_digit:
99 if (ch == '.') {
100 state = sw_first_minor_digit;
101 break;
102 }
103
104 if (ch < '0' || ch > '9') {
105 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
106 }
107
108 break;
109
110 /* the first digit of minor HTTP version */
111 case sw_first_minor_digit:
112 if (ch < '0' || ch > '9') {
113 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
114 }
115
116 state = sw_minor_digit;
117 break;
118
119 /* the minor HTTP version or the end of the request line */
120 case sw_minor_digit:
121 if (ch == ' ') {
122 state = sw_status;
123 break;
124 }
125
126 if (ch < '0' || ch > '9') {
127 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
128 }
129
130 break;
131
132 /* HTTP status code */
133 case sw_status:
134 if (ch < '0' || ch > '9') {
135 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
136 }
137
138 p->status = p->status * 10 + ch - '0';
139
140 if (++p->status_count == 3) {
141 state = sw_space_after_status;
142 p->status_start = pos - 3;
143 }
144
145 break;
146
147 /* space or end of line */
148 case sw_space_after_status:
149 switch (ch) {
150 case ' ':
151 state = sw_status_text;
152 break;
153 case CR:
154 state = sw_almost_done;
155 break;
156 case LF:
157 state = sw_done;
158 break;
159 default:
160 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
161 }
162 break;
163
164 /* any text until end of line */
165 case sw_status_text:
166 switch (ch) {
167 case CR:
168 state = sw_almost_done;
169
170 break;
171 case LF:
172 state = sw_done;
173 break;
174 }
175 break;
176
177 /* end of request line */
178 case sw_almost_done:
179 p->status_end = pos - 2;
180 switch (ch) {
181 case LF:
182 state = sw_done;
183 break;
184 default:
185 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
186 }
187 break;
188 }
189 }
190
191 p->header_in->pos = pos;
192
193 if (state == sw_done) {
194 if (p->status_end == NULL) {
195 p->status_end = pos - 1;
196 }
197
198 p->state = sw_start;
199 return NGX_OK;
200 }
201
202 p->state = state;
203 return NGX_AGAIN;
204 }