/
ngx_http_upstreamTest_module.c
498 lines (426 loc) · 14.9 KB
/
ngx_http_upstreamTest_module.c
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/*
* =====================================================================================
*
* Filename: ngx_http_upstreamTest_module.c
*
* Description:
*
* Version: 1.0
* Created: 04/20/2016 02:43:05 AM
* Revision: none
* Compiler: gcc
*
* Author: Dengbzh (),
* Organization:
*
* =====================================================================================
*/
#include<ngx_config.h>
#include<ngx_core.h>
#include<ngx_http.h>
typedef struct{
ngx_int_t port;
ngx_str_t ip;
}ngx_cluster_t;
typedef struct{
ngx_http_upstream_conf_t upstream;
ngx_cluster_t clusterA;
ngx_cluster_t clusterB;
ngx_cluster_t clusterC;
}ngx_http_upstreamTest_conf_t;
typedef struct{
ngx_http_status_t status;
}ngx_http_upstreamTest_ctx_t;
static ngx_int_t ngx_http_upstreamTest_create_request(ngx_http_request_t *r);
static void ngx_http_upstreamTest_finalize_request(ngx_http_request_t *r,ngx_int_t rc);
static void *ngx_http_upstreamTest_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_upstreamTest_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
//static ngx_int_t ngx_http_upstreamTest_init(ngx_conf_t *cf);
static char *ngx_conf_my_upstream(ngx_conf_t *cf,ngx_command_t *cmd,void *conf);
static ngx_command_t ngx_http_upstreamTest_commands[]={
{
ngx_string("My_upstream"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
ngx_conf_my_upstream,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL
},
{
ngx_string("upstream_connect_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.connect_timeout),
NULL
},
{
ngx_string("upstream_send_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.send_timeout),
NULL
},
{
ngx_string("upstream_read_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.read_timeout),
NULL
},
{
ngx_string("upstream_store_access"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_access_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.store_access),
NULL
},
{
ngx_string("upstream_buffering"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.buffering),
NULL
},
{
ngx_string("upstream_buffer_num"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,upstream.bufs.num),
NULL
},
{
ngx_string("children_port"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterA.port),
NULL
},
{
ngx_string("children_ip"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterA.ip),
NULL
},
{
ngx_string("youth_port"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterB.port),
NULL
},
{
ngx_string("youth_ip"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterB.ip),
NULL
},
{
ngx_string("adult_port"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterC.port),
NULL
},
{
ngx_string("adult_ip"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upstreamTest_conf_t,clusterC.ip),
NULL
},
ngx_null_command
};
static ngx_http_module_t ngx_http_upstreamTest_module_ctx = {
NULL,
//ngx_http_upstreamTest_init,
NULL,
NULL,
NULL,
NULL,
NULL,
ngx_http_upstreamTest_create_loc_conf,
ngx_http_upstreamTest_merge_loc_conf
// NULL
};
ngx_module_t ngx_http_upstreamTest_module = {
NGX_MODULE_V1,
&ngx_http_upstreamTest_module_ctx,
ngx_http_upstreamTest_commands,
NGX_HTTP_MODULE,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NGX_MODULE_V1_PADDING
};
static ngx_str_t children = ngx_string("%V&&type=children");
static ngx_str_t youth = ngx_string("%V&&type=youth");
static ngx_str_t adult = ngx_string("%V&&type=adult");
static ngx_int_t
ngx_http_upstreamTest_create_request(ngx_http_request_t *r)
{
ngx_http_upstreamTest_conf_t *upstream_conf = (ngx_http_upstreamTest_conf_t *)ngx_http_get_module_loc_conf(r,ngx_http_upstreamTest_module);
ngx_http_upstream_t *u = r->upstream;
ngx_int_t age = -1;
size_t age_len = 0;
if(r->args.len !=0 )
{
u_char *p = r->args.data;
u_char *ep = r->args.data + r->args.len - 1;
for(;p != ep; ++p)
{
if(*p == 'A')
{
if(ngx_strncmp(p,"Age",3) == 0)
{
p += 4;
u_char *e = p;
while(*e <= '9' && *e >= '0')
{
age_len++;
if(e == ep)
break;
e++;
}
age = ngx_atoi(p,age_len);
if(age == NGX_ERROR)
age = -1;
break;
}
}
}
}
ngx_str_t *backendQueryLine = NULL;
static struct sockaddr_in backendSockAddr;
backendSockAddr.sin_family = AF_INET;
u->resolved->sockaddr = (struct sockaddr *)&backendSockAddr;
u->resolved->socklen = sizeof(struct sockaddr_in);
u->resolved->naddrs = 1;
ngx_int_t port;
static u_char ip[20];
if(age!= -1)
{
if(age <= 10)
{
backendQueryLine = &children;
port = upstream_conf->clusterA.port;
memcpy(ip,upstream_conf->clusterA.ip.data,upstream_conf->clusterA.ip.len);
ip[upstream_conf->clusterA.ip.len] = '\0';
}
else if(age <= 20)
{
backendQueryLine = &youth;
port = upstream_conf->clusterB.port;
memcpy(ip,upstream_conf->clusterB.ip.data,upstream_conf->clusterB.ip.len);
ip[upstream_conf->clusterB.ip.len] = '\0';
}
else
{
backendQueryLine = &adult;
port = upstream_conf->clusterC.port;
memcpy(ip,upstream_conf->clusterC.ip.data,upstream_conf->clusterC.ip.len);
ip[upstream_conf->clusterC.ip.len] = '\0';
}
}
else
return NGX_ERROR;
backendSockAddr.sin_port = htons((in_port_t)port);
backendSockAddr.sin_addr.s_addr = inet_addr((const char*)ip);
ngx_int_t queryLineLen = backendQueryLine->len + r->args.len - 2;
ngx_buf_t *b = ngx_create_temp_buf(r->pool, queryLineLen);
if(b == NULL)
return NGX_ERROR;
b->last = b->pos + queryLineLen;
ngx_snprintf(b->pos,queryLineLen,(char *)backendQueryLine->data,&r->args);
r->upstream->request_bufs = ngx_alloc_chain_link(r->pool);
if(r->upstream->request_bufs == NULL)
return NGX_ERROR;
r->upstream->request_bufs->buf = b;
r->upstream->request_bufs->next = NULL;
// r->subrequest_in_memory = 1;
r->upstream->request_sent = 0;
r->upstream->header_sent = 0;
r->header_hash = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_upstreamTest_process_status_line(ngx_http_request_t *r)
{
return NGX_OK;
}
static ngx_int_t
ngx_http_upstreamTest_handler(ngx_http_request_t *r)
{
static ngx_int_t visited_times = 0;
ngx_http_upstreamTest_ctx_t *upstreamctx = ngx_http_get_module_ctx(r,ngx_http_upstreamTest_module);
if(upstreamctx == NULL)
{
upstreamctx = ngx_pcalloc(r->pool,sizeof(ngx_http_upstreamTest_ctx_t));
if(upstreamctx == NULL)
{
return NGX_ERROR;
}
ngx_http_set_ctx(r,upstreamctx,ngx_http_upstream_module);
}
if(ngx_http_upstream_create(r) != NGX_OK)
{
ngx_log_error(NGX_LOG_ERR,r->connection->log,0,"ngx_http_upstream_create() failed");
return NGX_ERROR;
}
ngx_http_upstreamTest_conf_t *upstreamconf = (ngx_http_upstreamTest_conf_t *)ngx_http_get_module_loc_conf(r,ngx_http_upstreamTest_module);
ngx_http_upstream_t *u = r->upstream;
u->conf = &upstreamconf->upstream;
u->buffering = upstreamconf->upstream.buffering;
u->resolved = (ngx_http_upstream_resolved_t*)ngx_pcalloc(r->pool,sizeof(ngx_http_upstream_resolved_t));
if(u->resolved == NULL)
{
ngx_log_error(NGX_LOG_ERR,r->connection->log,0,"ngx_pcalloc resolved error. %s",strerror(errno));
return NGX_ERROR;
}
// static struct sockaddr_in backendSockAddr;
// backendSockAddr.sin_family = AF_INET;
// backendSockAddr.sin_port = htons((in_port_t)7777);
// backendSockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
// u->resolved->sockaddr = (struct sockaddr *)&backendSockAddr;
// u->resolved->socklen = sizeof(struct sockaddr_in);
// u->resolved->naddrs = 1;
u->create_request = ngx_http_upstreamTest_create_request;
u->process_header = ngx_http_upstreamTest_process_status_line;
u->finalize_request = ngx_http_upstreamTest_finalize_request;
// r->main->count++;
// ngx_http_upstream_init(r);
if(!(r->method & (NGX_HTTP_GET | NGX_HTTP_HEAD)))
return NGX_HTTP_NOT_ALLOWED;
u_char ngx_upstream_string[1024];
ngx_sprintf(ngx_upstream_string,"Visited times: %d",++visited_times);
ngx_log_error(NGX_LOG_EMERG,r->connection->log,0,"ngx_upstream_string: %s",ngx_upstream_string);
ngx_uint_t content_length = ngx_strlen(ngx_upstream_string);
ngx_int_t rc;
if(!(r->method & (NGX_HTTP_GET | NGX_HTTP_HEAD)))
return NGX_HTTP_NOT_ALLOWED;
rc = ngx_http_discard_request_body(r);
if(rc != NGX_OK)
{
ngx_log_error(NGX_LOG_EMERG,r->connection->log,0,"discard requst_body failed!");
return rc;
}
ngx_str_set(&r->headers_out.content_type,"text/html");
if(r->method == NGX_HTTP_HEAD)
{
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = content_length;
ngx_log_error(NGX_LOG_EMERG,r->connection->log,0,"send respond head!");
return ngx_http_send_header(r);
}
ngx_buf_t *b;
b = ngx_pcalloc(r->pool,sizeof(ngx_buf_t));
if(b == NULL)
return NGX_HTTP_INTERNAL_SERVER_ERROR;
ngx_chain_t out;
out.buf = b;
out.next = NULL;
b->pos = ngx_upstream_string;
b->last = ngx_upstream_string + content_length;
b->memory = 1;
b->last_buf = 1;
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = content_length;
rc = ngx_http_send_header(r);
if(rc == NGX_ERROR || rc > NGX_OK || r->header_only)
return rc;
ngx_http_output_filter(r,&out);
r->main->count++;
ngx_http_upstream_init(r);
return NGX_OK;
}
static void *
ngx_http_upstreamTest_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_upstreamTest_conf_t *conf;
conf = ngx_pcalloc(cf->pool,sizeof(ngx_http_upstreamTest_conf_t));
if(conf == NULL)
{
return NULL;
}
conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
conf->upstream.store_access = NGX_CONF_UNSET_UINT;
conf->upstream.buffering = NGX_CONF_UNSET;
conf->upstream.bufs.num = NGX_CONF_UNSET_UINT;
conf->upstream.bufs.size = ngx_pagesize;
conf->upstream.buffer_size = ngx_pagesize;
conf->upstream.busy_buffers_size = 2*ngx_pagesize;
conf->upstream.temp_file_write_size = 2 * ngx_pagesize;
conf->upstream.max_temp_file_size = 1024*1024*1024;
conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
conf->clusterA.port = NGX_CONF_UNSET;
conf->clusterB.port = NGX_CONF_UNSET;
conf->clusterC.port = NGX_CONF_UNSET;
ngx_str_null(&conf->clusterA.ip);
ngx_str_null(&conf->clusterB.ip);
ngx_str_null(&conf->clusterC.ip);
return conf;
}
static void
ngx_http_upstreamTest_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
{
ngx_log_error(NGX_LOG_DEBUG,r->connection->log,0,"upstreamTest_finalize_request");
}
static char *
ngx_http_upstreamTest_merge_loc_conf(ngx_conf_t *cf,void *parent,void *child)
{
ngx_http_upstreamTest_conf_t *prev = parent;
ngx_http_upstreamTest_conf_t *conf = child;
ngx_conf_merge_msec_value(conf->upstream.connect_timeout,prev->upstream.connect_timeout,60000);
ngx_conf_merge_msec_value(conf->upstream.send_timeout,prev->upstream.send_timeout,60000);
ngx_conf_merge_msec_value(conf->upstream.read_timeout,prev->upstream.read_timeout,60000);
ngx_conf_merge_uint_value(conf->upstream.store_access,prev->upstream.store_access,0600);
ngx_conf_merge_value(conf->upstream.bufs.num,prev->upstream.bufs.num,8);
ngx_conf_merge_value(conf->clusterA.port,prev->clusterA.port,7777);
ngx_conf_merge_value(conf->clusterB.port,prev->clusterB.port,8888);
ngx_conf_merge_value(conf->clusterC.port,prev->clusterC.port,9999);
ngx_conf_merge_str_value(conf->clusterA.ip,prev->clusterA.ip,"127.0.0.1");
ngx_conf_merge_str_value(conf->clusterB.ip,prev->clusterB.ip,"127.0.0.1");
ngx_conf_merge_str_value(conf->clusterC.ip,prev->clusterC.ip,"127.0.0.1");
return NGX_CONF_OK;
}
/*
static ngx_int_t
ngx_http_upstreamTest_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf,ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if(h == NULL)
{
return NGX_ERROR;
}
*h = ngx_http_upstreamTest_handler;
return NGX_OK;
}*/
static char *ngx_conf_my_upstream(ngx_conf_t *cf,ngx_command_t *cmd,void *conf)
{
ngx_http_core_loc_conf_t *clcf = ngx_http_conf_get_module_loc_conf(cf,ngx_http_core_module);
clcf->handler = ngx_http_upstreamTest_handler;
return NGX_CONF_OK;
}