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
|
/* httptreq.c Started by Martin Peach 20110111 */
/* httpreq will generate http 1.1 requests as lists of bytes suitable for input to tcpclient */
/* See http://www.w3.org/Protocols/rfc2616/rfc2616.html */
#include "m_pd.h"
#include <stdio.h>
#include <string.h>
static t_class *httpreq_class;
typedef struct _httpreq
{
t_object x_obj;
t_outlet *x_reqout;
int x_verbosity;
} t_httpreq;
#define MAX_GETSTRING 256
static void httpreq_bang(t_httpreq *x);
static void httpreq_get(t_httpreq *x, t_symbol *s);
static void httpreq_head(t_httpreq *x, t_symbol *s);
static void httpreq_verbosity(t_httpreq *x, t_floatarg verbosity);
static void *httpreq_new (void);
void httpreq_setup(void);
static void httpreq_bang(t_httpreq *x)
{
post("httpreq_bang %p", x);
}
static void httpreq_get(t_httpreq *x, t_symbol *s)
{
unsigned int i, j, len;
char buf[MAX_GETSTRING];
char request_line[1024];
t_atom request_atoms[1024];
len = strlen (s->s_name);
if (len > MAX_GETSTRING)
{
pd_error(x, "httpreq_get: string too long (%d), should be less than %d", len, MAX_GETSTRING);
return;
}
for (i = 0; i < strlen(s->s_name); ++i) buf[i] = s->s_name[i];
buf[i] = 0;
if (0 != strncmp("http://", buf, 7))
{
pd_error(x, "httpreq_get: url doesn't begin with 'http://' (%d)", len);
return;
}
/*
5.1 Request-Line
The Request-Line begins with a method token,
followed by the Request-URI and the protocol version,
and ending with CRLF.
The elements are separated by SP characters.
No CR or LF is allowed except in the final CRLF sequence.
Request-Line = Method SP Request-URI SP HTTP-Version CRLF
*/
j = sprintf(request_line, "GET ");
for (i = 7; i < len; ++i)
{ /* skip "http://" and the host name */
if ('/' == buf[i]) break;
}
for (; i < len; ++i, ++j)
{
if (buf[i] <= 0x20) break;
request_line[j] = buf[i];
}
j += sprintf(&request_line[j], " HTTP/1.1");
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
j += sprintf(&request_line[j], "Host: ");
for (i = 7; i < len; ++i, ++j)
{ /* copy the host name */
if ('/' == buf[i]) break;
request_line[j] = buf[i];
}
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
request_line[j] = 0; // terminate string
/* output the request line as a list of floats */
for (i = 0; i < j; ++i)
{
SETFLOAT(&request_atoms[i], request_line[i]);
}
if (x->x_verbosity) post("httpreq_get: %s", request_line);
outlet_list(x->x_reqout, &s_list, j, &request_atoms[0]);
}
static void httpreq_head(t_httpreq *x, t_symbol *s)
{ /* this is the same as get except for the method */
unsigned int i, j, len;
char buf[MAX_GETSTRING];
char request_line[1024];
t_atom request_atoms[1024];
len = strlen (s->s_name);
if (len > MAX_GETSTRING)
{
pd_error(x, "httpreq_head: string too long (%d), should be less than %d", len, MAX_GETSTRING);
return;
}
for (i = 0; i < strlen(s->s_name); ++i) buf[i] = s->s_name[i];
buf[i] = 0;
if (0 != strncmp("http://", buf, 7))
{
pd_error(x, "httpreq_head: url doesn't begin with 'http://' (%d)", len);
return;
}
j = sprintf(request_line, "HEAD ");
for (i = 7; i < len; ++i)
{ /* skip "http://" and the host name */
if ('/' == buf[i]) break;
}
for (; i < len; ++i, ++j)
{
if (buf[i] <= 0x20) break;
request_line[j] = buf[i];
}
j += sprintf(&request_line[j], " HTTP/1.1");
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
j += sprintf(&request_line[j], "Host: ");
for (i = 7; i < len; ++i, ++j)
{ /* copy the host name */
if ('/' == buf[i]) break;
request_line[j] = buf[i];
}
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
request_line[j++] = 0xD; // <CR>
request_line[j++] = 0xA; // <LF>
request_line[j] = 0; // terminate string
/* output the request line as a list of floats */
for (i = 0; i < j; ++i)
{
SETFLOAT(&request_atoms[i], request_line[i]);
}
if (x->x_verbosity) post("httpreq_head: %s", request_line);
outlet_list(x->x_reqout, &s_list, j, &request_atoms[0]);
}
static void httpreq_verbosity(t_httpreq *x, t_float verbosity)
{
x->x_verbosity = verbosity;
if (x->x_verbosity != 0) post ("httpreq_verbosity %d", x->x_verbosity);
}
static void *httpreq_new (void)
{
t_httpreq *x = (t_httpreq *)pd_new(httpreq_class);
if (NULL != x)
{
x->x_reqout = outlet_new(&x->x_obj, &s_anything);
}
return (void *)x;
}
void httpreq_setup(void)
{
httpreq_class = class_new(gensym("httpreq"), (t_newmethod)httpreq_new, 0, sizeof(t_httpreq), CLASS_DEFAULT, 0);
class_addbang(httpreq_class, httpreq_bang);
class_addmethod (httpreq_class, (t_method)httpreq_get, gensym ("GET"), A_DEFSYM, 0);
class_addmethod (httpreq_class, (t_method)httpreq_head, gensym ("HEAD"), A_DEFSYM, 0);
class_addmethod(httpreq_class, (t_method)httpreq_verbosity, gensym("verbosity"), A_FLOAT, 0);
}
/* fin httpreq.c */
|
