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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#include "parse.h"
#include "cookie.h"
#include "cookies.h"
#include "error.h"
#include "file.h"
#include "multipart.h"
#include "param.h"
#include "request.h"
#include "response.h"
#include "tools.h"
#include "urlencoded.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
extern char **const environ;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* CGI Request
*/
static char *plain_env(char *env_name)
{
const char *env = getenv(env_name);
if (!env) {
return 0;
}
return magi_str_create_copy(env, strlen(env));
}
static char *lower_env(char *env_name)
{
char *env = plain_env(env_name);
magi_str_lowercase(env);
return env;
}
static void cgi_http_env(magi_request *r)
{
char **env;
int len = 0;
r->meta = 0;
for (env = environ; *env; ++env) {
magi_param meta;
char *name_end = strchr(*env, '=');
int nlen = name_end - *env;
int dlen = strlen(name_end + 1);
len += nlen + dlen;
if (len > r->limits.params_meta && r->limits.params_meta) {
r->error = magi_error_limit;
return;
}
meta.name = magi_str_create_copy(*env, nlen);
meta.data = magi_str_create_copy(name_end + 1, dlen);
magi_params_add(&r->meta, &meta);
}
}
static void cgi_env(magi_request *r)
{
cgi_http_env(r);
r->method = plain_env("REQUEST_METHOD");
r->document_root = plain_env("DOCUMENT_ROOT");
r->script = plain_env("SCRIPT_NAME");
r->host = lower_env("HTTP_HOST");
if (!r->host) {
r->host = lower_env("SERVER_NAME");
}
if (getenv("SERVER_PORT")) {
r->port = atoi(getenv("SERVER_PORT"));
r->is_secure = r->port == 443;
} else {
r->port = 0;
r->is_secure = 0;
}
r->path = plain_env("PATH_INFO");
}
static void cgi_cookies(magi_request *r)
{
const char *env = getenv("HTTP_COOKIE");
if (!env || !*env) {
r->cookies = 0;
return;
}
if ((int)strlen(env) > r->limits.cookies && r->limits.cookies) {
r->error = magi_error_limit;
return;
}
magi_parse_cookies(r, env);
}
static void cgi_input_get(magi_error *e, char **input, int max)
{
const char *env_input = getenv("QUERY_STRING");
if (env_input) {
int len = strlen(env_input);
if (len >= max && max) {
*e = magi_error_limit;
return;
}
*input = magi_str_create_copy(env_input, len);
}
}
static void cgi_url(magi_request *request)
{
char *in = 0;
cgi_input_get(&request->error, &in, request->limits.params_head);
if (!request->error) {
magi_parse_urlencoded(&request->head, in);
free(in);
}
}
static void cgi_input_post(magi_error *e, char **input, int max)
{
int input_len = strtoul(getenv("CONTENT_LENGTH"), 0, 10);
if (!input_len) {
*e = magi_error_length;
return;
}
if (input_len > max && max) {
*e = magi_error_limit;
return;
}
*input = magi_str_create(input_len);
if ((int)fread(*input, 1, input_len, stdin) != input_len) {
*e = magi_error_length;
return;
}
}
static char *bound(const char *type)
{
type = strchr(type, '=');
if (!type) {
return 0;
}
type += strspn(type, " \t") + 1;
if (*type == '"') {
++type;
return magi_str_create_copy(type, type - strchr(type, '"'));
}
return magi_str_create_copy(type, strcspn(type, " \t"));
}
static int next()
{
return getchar();
}
/* Interfacial CGI Request Handling */
int magi_parse_head(magi_request *request)
{
request->cookies = 0;
request->files = 0;
request->meta = 0;
request->head = 0;
request->body = 0;
request->error = 0;
cgi_env(request);
cgi_cookies(request);
cgi_url(request);
return !request->error;
}
int magi_parse_body(magi_request *request)
{
magi_error *e = &request->error;
request->error = magi_error_none;
if (request->method && !strcmp(request->method, "POST")) {
const char *t = getenv("CONTENT_TYPE");
if (!t) {
*e = magi_error_notype;
return 0;
}
if (!strncmp(t, "multipart/form-data", 19)) {
char *boundary = bound(t);
if (boundary && *boundary) {
magi_parse_multipart(request, boundary, next, 0);
} else {
*e = magi_error_nobound;
}
free(boundary);
} else if (!strcmp(t, "application/x-www-form-urlencoded")) {
char *in = 0;
cgi_input_post(e, &in, request->limits.params_body);
if (!*e) {
magi_parse_urlencoded(&request->body, in);
}
free(in);
} else {
*e = magi_error_unknown;
return 0;
}
}
return !request->error;
}
int magi_parse(magi_request *request)
{
return magi_parse_head(request) && magi_parse_body(request);
}
|
