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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct {
ngx_bufs_t bufs;
} ngx_http_copy_filter_conf_t;
static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf);
static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf,
void *parent, void *child);
static ngx_int_t ngx_http_copy_filter_init(ngx_cycle_t *cycle);
static ngx_command_t ngx_http_copy_filter_commands[] = {
{ ngx_string("output_buffers"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
ngx_conf_set_bufs_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_copy_filter_conf_t, bufs),
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_copy_filter_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_copy_filter_create_conf, /* create location configuration */
ngx_http_copy_filter_merge_conf /* merge location configuration */
};
ngx_module_t ngx_http_copy_filter_module = {
NGX_MODULE_V1,
&ngx_http_copy_filter_module_ctx, /* module context */
ngx_http_copy_filter_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
ngx_http_copy_filter_init, /* init module */
NULL /* init process */
};
static ngx_http_output_body_filter_pt ngx_http_next_filter;
static ngx_int_t
ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
ngx_int_t rc;
ngx_output_chain_ctx_t *ctx;
ngx_http_copy_filter_conf_t *conf;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"copy filter: \"%V\"", &r->uri);
if (r->connection->closed) {
rc = ngx_http_next_filter(r, in);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"copy closed filter: %i \"%V\"", rc, &r->uri);
return rc;
}
ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module);
if (ctx == NULL) {
conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module);
ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module);
ctx->sendfile = r->connection->sendfile;
ctx->need_in_memory = r->main_filter_need_in_memory
|| r->filter_need_in_memory;
ctx->need_in_temp = r->filter_need_temporary;
ctx->pool = r->pool;
ctx->bufs = conf->bufs;
ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module;
ctx->output_filter = (ngx_output_chain_filter_pt) ngx_http_next_filter;
ctx->filter_ctx = r;
}
rc = ngx_output_chain(ctx, in);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"copy filter: %i \"%V\"", rc, &r->uri);
return rc;
}
static void *
ngx_http_copy_filter_create_conf(ngx_conf_t *cf)
{
ngx_http_copy_filter_conf_t *conf;
conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t));
if (conf == NULL) {
return NULL;
}
conf->bufs.num = 0;
return conf;
}
static char *
ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_copy_filter_conf_t *prev = parent;
ngx_http_copy_filter_conf_t *conf = child;
ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 1, 32768);
return NULL;
}
static ngx_int_t
ngx_http_copy_filter_init(ngx_cycle_t *cycle)
{
ngx_http_next_filter = ngx_http_top_body_filter;
ngx_http_top_body_filter = ngx_http_copy_filter;
return NGX_OK;
}
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