ngx_http_hello_world_module.c
#include <ngx_config.h>
#include <ngx_core.h> #include <ngx_http.h> typedef struct { ngx_str_t hello_string; ngx_int_t hello_counter; }ngx_http_hello_loc_conf_t;static ngx_int_t ngx_http_hello_init(ngx_conf_t *cf);
static void *ngx_http_hello_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_hello_string(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf); static char *ngx_http_hello_counter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);static ngx_command_t ngx_http_hello_commands[] = {
{ ngx_string("hello_string"), NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1, ngx_http_hello_string, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_hello_loc_conf_t, hello_string), NULL },{
ngx_string("hello_counter"), NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_http_hello_counter, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_hello_loc_conf_t, hello_counter), NULL },ngx_null_command
}; /* static u_char ngx_hello_default_string[] = "Default String: Hello, world!"; */ static int ngx_hello_visited_times = 0;static ngx_http_module_t ngx_http_hello_module_ctx = {
NULL, /* preconfiguration */ ngx_http_hello_init, /* postconfiguration */NULL, /* create main configuration */
NULL, /* init main configuration */NULL, /* create server configuration */
NULL, /* merge server configuration */ngx_http_hello_create_loc_conf, /* create location configuration */
NULL /* merge location configuration */ }; ngx_module_t ngx_http_hello_module = { NGX_MODULE_V1, &ngx_http_hello_module_ctx, /* module context */ ngx_http_hello_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_http_hello_handler(ngx_http_request_t *r) { ngx_int_t rc; ngx_buf_t *b; ngx_chain_t out; ngx_http_hello_loc_conf_t* my_conf; u_char ngx_hello_string[1024] = {0}; ngx_uint_t content_length = 0;ngx_log_error(NGX_LOG_EMERG, r->connection->log, 0, "ngx_http_hello_handler is called!");
my_conf = ngx_http_get_module_loc_conf(r, ngx_http_hello_module);
if (my_conf->hello_string.len == 0 ) { ngx_log_error(NGX_LOG_EMERG, r->connection->log, 0, "hello_string is empty!"); return NGX_DECLINED; } if (my_conf->hello_counter == NGX_CONF_UNSET || my_conf->hello_counter == 0) { //ngx_sprintf(ngx_hello_string, "%s", my_conf->hello_string.data); ngx_sprintf(ngx_hello_string, "%s", "haojinglong"); } else { //ngx_sprintf(ngx_hello_string, "%s Visited Times:%d", my_conf->hello_string.data, //++ngx_hello_visited_times); ngx_sprintf(ngx_hello_string, "%s Visited Times:%d", "haojinglong", ++ngx_hello_visited_times); } ngx_log_error(NGX_LOG_EMERG, r->connection->log, 0, "hello_string:%s", ngx_hello_string); content_length = ngx_strlen(ngx_hello_string);/* we response to 'GET' and 'HEAD' requests only */
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { return NGX_HTTP_NOT_ALLOWED; }/* discard request body, since we don't need it here */
rc = ngx_http_discard_request_body(r);if (rc != NGX_OK) {
return rc; }/* set the 'Content-type' header */
/* *r->headers_out.content_type.len = sizeof("text/html") - 1; *r->headers_out.content_type.data = (u_char *)"text/html"; */ ngx_str_set(&r->headers_out.content_type, "text/plain"); r->headers_out.content_type_len = sizeof("text/plain") - 1; /* send the header only, if the request type is http 'HEAD' */ if (r->method == NGX_HTTP_HEAD) { r->headers_out.status = NGX_HTTP_OK; //r->headers_out.content_length_n = content_length; //r->headers_out.content_length_n = 0;return ngx_http_send_header(r);
}/* allocate a buffer for your response body */
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); if (b == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; }/* attach this buffer to the buffer chain */
out.buf = b; out.next = NULL;/* adjust the pointers of the buffer */
b->pos = ngx_hello_string; b->last = ngx_hello_string + content_length; b->memory = 1; /* this buffer is in memory */ b->last_buf = 1; /* this is the last buffer in the buffer chain *//* set the status line */
r->headers_out.status = NGX_HTTP_OK; //r->headers_out.content_length_n = content_length;/* send the headers of your response */
rc = ngx_http_send_header(r);if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc; }/* send the buffer chain of your response */
return ngx_http_output_filter(r, &out); }static void *ngx_http_hello_create_loc_conf(ngx_conf_t *cf)
{ ngx_http_hello_loc_conf_t* local_conf = NULL; local_conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_hello_loc_conf_t)); if (local_conf == NULL) { return NULL; }ngx_str_null(&local_conf->hello_string);
local_conf->hello_counter = NGX_CONF_UNSET;return local_conf;
}/*
static char *ngx_http_hello_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_hello_loc_conf_t* prev = parent; ngx_http_hello_loc_conf_t* conf = child;ngx_conf_merge_str_value(conf->hello_string, prev->hello_string, ngx_hello_default_string);
ngx_conf_merge_value(conf->hello_counter, prev->hello_counter, 0);return NGX_CONF_OK;
}*/static char *
ngx_http_hello_string(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) {ngx_http_hello_loc_conf_t* local_conf;
local_conf = conf; char* rv = ngx_conf_set_str_slot(cf, cmd, conf);ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "hello_string:%s", local_conf->hello_string.data);
return rv;
} static char *ngx_http_hello_counter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_hello_loc_conf_t* local_conf;local_conf = conf;
char* rv = NULL;
rv = ngx_conf_set_flag_slot(cf, cmd, conf);
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "hello_counter:%d", local_conf->hello_counter); return rv; }static ngx_int_t
ngx_http_hello_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_hello_handler;
return NGX_OK;
} configngx_addon_name=ngx_http_hello_world_module
HTTP_MODULES="$HTTP_MODULES ngx_http_hello_module" NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_hello_world_module.c"
./configure --add-module=/home/nginx/helloword --with-http_gzip_static_module --with-http_stub_status_module