summaryrefslogtreecommitdiff
path: root/content/fetchcache.c
blob: 8aa81f66fc992cdd4bdb2a24b56bd6a01f8b8e29 (plain)
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
/**
 * $Id: fetchcache.c,v 1.7 2003/04/09 21:57:09 bursa Exp $
 */

#include <assert.h>
#include <string.h>
#include "netsurf/content/cache.h"
#include "netsurf/content/fetchcache.h"
#include "netsurf/content/fetch.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/utils.h"


struct fetchcache {
	char *url;
	void (*callback)(fetchcache_msg msg, struct content *c, void *p, const char *error);
	void *p;
	struct fetch *f;
	struct content *c;
	unsigned long width, height;
	unsigned long size;
	content_type allowed;
};


static void fetchcache_free(struct fetchcache *fc);
static void fetchcache_callback(fetchcache_msg msg, void *p, char *data, unsigned long size);
static void status_callback(void *p, const char *status);


void fetchcache(const char *url, char *referer,
		void (*callback)(fetchcache_msg msg, struct content *c, void *p, const char *error),
		void *p, unsigned long width, unsigned long height, content_type allowed)
{
	struct content *c;
	struct fetchcache *fc;

	c = cache_get(url);
	if (c != 0) {
		/* check type is allowed */
		if ((1 << c->type) & allowed) {
			callback(FETCHCACHE_STATUS, c, p, "Found in cache");
			content_revive(c, width, height);
			callback(FETCHCACHE_OK, c, p, 0);
		} else {
			callback(FETCHCACHE_BADTYPE, 0, p, "");
			cache_free(c);
		}
		return;
	}

	callback(FETCHCACHE_STATUS, c, p, "Starting fetch");
	fc = xcalloc(1, sizeof(struct fetchcache));
	fc->url = xstrdup(url);
	fc->callback = callback;
	fc->p = p;
	fc->c = 0;
	fc->width = width;
	fc->height = height;
	fc->size = 0;
	fc->allowed = allowed;
	fc->f = fetch_start(fc->url, referer, fetchcache_callback, fc);
}


void fetchcache_free(struct fetchcache *fc)
{
	free(fc->url);
	free(fc);
}


void fetchcache_callback(fetch_msg msg, void *p, char *data, unsigned long size)
{
	struct fetchcache *fc = p;
	content_type type;
	char *mime_type;
	char *semic;
	char status[40];
	switch (msg) {
		case FETCH_TYPE:
			mime_type = strdup(data);
			if ((semic = strchr(mime_type, ';')) != 0)
				*semic = 0;	/* remove "; charset=..." */
			type = content_lookup(mime_type);
			LOG(("FETCH_TYPE, type %u", type));
			if ((1 << type) & fc->allowed) {
				fc->c = content_create(type, fc->url);
				fc->c->status_callback = status_callback;
				fc->c->status_p = fc;
			} else {
				fetch_abort(fc->f);
				fc->callback(FETCHCACHE_BADTYPE, 0, fc->p, mime_type);
				free(fc);
			}
			free(mime_type);
			break;
		case FETCH_DATA:
			LOG(("FETCH_DATA"));
			assert(fc->c != 0);
			fc->size += size;
			sprintf(status, "Received %lu bytes", fc->size);
			fc->callback(FETCHCACHE_STATUS, fc->c, fc->p, status);
			content_process_data(fc->c, data, size);
			break;
		case FETCH_FINISHED:
			LOG(("FETCH_FINISHED"));
			assert(fc->c != 0);
			sprintf(status, "Converting %lu bytes", fc->size);
			fc->callback(FETCHCACHE_STATUS, fc->c, fc->p, status);
			if (content_convert(fc->c, fc->width, fc->height) == 0) {
				cache_put(fc->c);
				fc->callback(FETCHCACHE_OK, fc->c, fc->p, 0);
			} else {
				content_destroy(fc->c);
				fc->callback(FETCHCACHE_ERROR, 0, fc->p, "Conversion failed");
			}
			fetchcache_free(fc);
			break;
		case FETCH_ERROR:
			LOG(("FETCH_ERROR, '%s'", data));
			if (fc->c != 0)
				content_destroy(fc->c);
			fc->callback(FETCHCACHE_ERROR, 0, fc->p, data);
			fetchcache_free(fc);
			break;
		default:
			assert(0);
	}
}


void status_callback(void *p, const char *status)
{
	struct fetchcache *fc = p;
	fc->callback(FETCHCACHE_STATUS, fc->c, fc->p, status);
}


#ifdef TEST

#include <unistd.h>

void callback(fetchcache_msg msg, struct content *c, void *p, char *error)
{
	switch (msg) {
		case FETCHCACHE_OK:
			LOG(("FETCHCACHE_OK, url '%s'", p));
			break;
		case FETCHCACHE_BADTYPE:
			LOG(("FETCHCACHE_BADTYPE, url '%s'", p));
			break;
		case FETCHCACHE_ERROR:
			LOG(("FETCHCACHE_ERROR, url '%s', error '%s'", p, error));
			break;
		default:
			assert(0);
	}
}

char *test[] = {"http://www.google.co.uk/", "http://www.ox.ac.uk/", "blah://blah/"};

int main(void)
{
	int i;

	cache_init();
	fetch_init();

	for (i = 0; i != sizeof(test) / sizeof(test[0]); i++)
		fetchcache(test[i], 0, callback, test[i], 800, 0);
	for (i = 0; i != 5; i++) {
		fetch_poll();
		sleep(1);
	}
	for (i = 0; i != sizeof(test) / sizeof(test[0]); i++)
		fetchcache(test[i], 0, callback, test[i], 800, 0);
	for (i = 0; i != 20; i++) {
		fetch_poll();
		sleep(1);
	}
	return 0;
}

#endif