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
|
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_hunk.h>
#include <ngx_conf_file.h>
#include <ngx_event_write.h>
#include <ngx_http.h>
#include <ngx_http_config.h>
#include <ngx_http_write_filter.h>
static void *ngx_http_write_filter_create_conf(ngx_pool_t *pool);
static ngx_command_t ngx_http_write_filter_commands[] = {
{ngx_string("write_buffer"),
NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF,
offsetof(ngx_http_write_filter_conf_t, buffer_output)},
{ngx_string(""), 0, NULL, 0, 0}
};
ngx_http_module_t ngx_http_write_filter_module_ctx = {
NGX_HTTP_MODULE,
NULL, /* create server config */
NULL, /* init server config */
ngx_http_write_filter_create_conf, /* create location config */
NULL, /* merge location config */
NULL, /* translate handler */
NULL, /* output header filter */
NULL, /* next output header filter */
ngx_http_write_filter, /* output body filter */
NULL, /* next output body filter */
};
ngx_module_t ngx_http_write_filter_module = {
&ngx_http_write_filter_module_ctx, /* module context */
ngx_http_write_filter_commands, /* module directives */
NGX_HTTP_MODULE_TYPE, /* module type */
NULL /* init module */
};
int ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
int last;
off_t size, flush;
ngx_chain_t *ch, **prev, *chain;
ngx_http_write_filter_ctx_t *ctx;
ngx_http_write_filter_conf_t *conf;
ctx = (ngx_http_write_filter_ctx_t *)
ngx_http_get_module_ctx(r->main ? r->main : r,
ngx_http_write_filter_module_ctx);
if (ctx == NULL) {
ngx_http_create_ctx(r, ctx,
ngx_http_write_filter_module_ctx,
sizeof(ngx_http_write_filter_ctx_t));
}
size = flush = 0;
last = 0;
prev = &ctx->out;
/* find size, flush point and last link of saved chain */
for (ch = ctx->out; ch; ch = ch->next) {
prev = &ch->next;
size += ch->hunk->last.file - ch->hunk->pos.file;
ngx_log_debug(r->connection->log, "old chunk: %x " QX_FMT " " QD_FMT _
ch->hunk->type _ ch->hunk->pos.file _
ch->hunk->last.file - ch->hunk->pos.file);
if (ch->hunk->type & (NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED)) {
flush = size;
}
if (ch->hunk->type & NGX_HUNK_LAST) {
last = 1;
}
}
/* add new chain to existent one */
for (/* void */; in; in = in->next) {
ngx_test_null(ch, ngx_palloc(r->pool, sizeof(ngx_chain_t)), NGX_ERROR);
ch->hunk = in->hunk;
ch->next = NULL;
*prev = ch;
prev = &ch->next;
size += ch->hunk->last.file - ch->hunk->pos.file;
ngx_log_debug(r->connection->log, "new chunk: %x " QX_FMT " " QD_FMT _
ch->hunk->type _ ch->hunk->pos.file _
ch->hunk->last.file - ch->hunk->pos.file);
if (ch->hunk->type & (NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED)) {
flush = size;
}
if (ch->hunk->type & NGX_HUNK_LAST) {
last = 1;
}
}
conf = (ngx_http_write_filter_conf_t *)
ngx_http_get_module_loc_conf(r->main ? r->main : r,
ngx_http_write_filter_module_ctx);
ngx_log_debug(r->connection->log, "l:%d f:%d" _ last _ flush);
if (!last && flush == 0 && size < conf->buffer_output) {
return NGX_OK;
}
chain = ngx_event_write(r->connection, ctx->out, flush);
if (chain == (ngx_chain_t *) -1) {
return NGX_ERROR;
}
ctx->out = chain;
ngx_log_debug(r->connection->log, "write filter %x" _ chain);
return (chain ? NGX_AGAIN : NGX_OK);
}
static void *ngx_http_write_filter_create_conf(ngx_pool_t *pool)
{
ngx_http_write_filter_conf_t *conf;
ngx_test_null(conf,
ngx_palloc(pool, sizeof(ngx_http_write_filter_conf_t)),
NULL);
conf->buffer_output = NGX_CONF_UNSET;
return conf;
}
|
