diff options
Diffstat (limited to 'nginx/src/http/modules/ngx_http_mirror_module.c')
| -rw-r--r-- | nginx/src/http/modules/ngx_http_mirror_module.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/nginx/src/http/modules/ngx_http_mirror_module.c b/nginx/src/http/modules/ngx_http_mirror_module.c new file mode 100644 index 0000000..787adb3 --- /dev/null +++ b/nginx/src/http/modules/ngx_http_mirror_module.c @@ -0,0 +1,264 @@ + +/* + * Copyright (C) Roman Arutyunyan + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + + +typedef struct { + ngx_array_t *mirror; + ngx_flag_t request_body; +} ngx_http_mirror_loc_conf_t; + + +typedef struct { + ngx_int_t status; +} ngx_http_mirror_ctx_t; + + +static ngx_int_t ngx_http_mirror_handler(ngx_http_request_t *r); +static void ngx_http_mirror_body_handler(ngx_http_request_t *r); +static ngx_int_t ngx_http_mirror_handler_internal(ngx_http_request_t *r); +static void *ngx_http_mirror_create_loc_conf(ngx_conf_t *cf); +static char *ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent, + void *child); +static char *ngx_http_mirror(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); +static ngx_int_t ngx_http_mirror_init(ngx_conf_t *cf); + + +static ngx_command_t ngx_http_mirror_commands[] = { + + { ngx_string("mirror"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_http_mirror, + NGX_HTTP_LOC_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("mirror_request_body"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_mirror_loc_conf_t, request_body), + NULL }, + + ngx_null_command +}; + + +static ngx_http_module_t ngx_http_mirror_module_ctx = { + NULL, /* preconfiguration */ + ngx_http_mirror_init, /* postconfiguration */ + + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + NULL, /* create server configuration */ + NULL, /* merge server configuration */ + + ngx_http_mirror_create_loc_conf, /* create location configuration */ + ngx_http_mirror_merge_loc_conf /* merge location configuration */ +}; + + +ngx_module_t ngx_http_mirror_module = { + NGX_MODULE_V1, + &ngx_http_mirror_module_ctx, /* module context */ + ngx_http_mirror_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_mirror_handler(ngx_http_request_t *r) +{ + ngx_int_t rc; + ngx_http_mirror_ctx_t *ctx; + ngx_http_mirror_loc_conf_t *mlcf; + + if (r != r->main) { + return NGX_DECLINED; + } + + mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module); + + if (mlcf->mirror == NULL) { + return NGX_DECLINED; + } + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "mirror handler"); + + if (mlcf->request_body) { + ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module); + + if (ctx) { + return ctx->status; + } + + ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_mirror_ctx_t)); + if (ctx == NULL) { + return NGX_ERROR; + } + + ctx->status = NGX_DONE; + + ngx_http_set_ctx(r, ctx, ngx_http_mirror_module); + + rc = ngx_http_read_client_request_body(r, ngx_http_mirror_body_handler); + if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { + return rc; + } + + ngx_http_finalize_request(r, NGX_DONE); + return NGX_DONE; + } + + return ngx_http_mirror_handler_internal(r); +} + + +static void +ngx_http_mirror_body_handler(ngx_http_request_t *r) +{ + ngx_http_mirror_ctx_t *ctx; + + ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module); + + ctx->status = ngx_http_mirror_handler_internal(r); + + r->preserve_body = 1; + + r->write_event_handler = ngx_http_core_run_phases; + ngx_http_core_run_phases(r); +} + + +static ngx_int_t +ngx_http_mirror_handler_internal(ngx_http_request_t *r) +{ + ngx_str_t *name; + ngx_uint_t i; + ngx_http_request_t *sr; + ngx_http_mirror_loc_conf_t *mlcf; + + mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module); + + name = mlcf->mirror->elts; + + for (i = 0; i < mlcf->mirror->nelts; i++) { + if (ngx_http_subrequest(r, &name[i], &r->args, &sr, NULL, + NGX_HTTP_SUBREQUEST_BACKGROUND) + != NGX_OK) + { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + sr->header_only = 1; + sr->method = r->method; + sr->method_name = r->method_name; + } + + return NGX_DECLINED; +} + + +static void * +ngx_http_mirror_create_loc_conf(ngx_conf_t *cf) +{ + ngx_http_mirror_loc_conf_t *mlcf; + + mlcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_mirror_loc_conf_t)); + if (mlcf == NULL) { + return NULL; + } + + mlcf->mirror = NGX_CONF_UNSET_PTR; + mlcf->request_body = NGX_CONF_UNSET; + + return mlcf; +} + + +static char * +ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_http_mirror_loc_conf_t *prev = parent; + ngx_http_mirror_loc_conf_t *conf = child; + + ngx_conf_merge_ptr_value(conf->mirror, prev->mirror, NULL); + ngx_conf_merge_value(conf->request_body, prev->request_body, 1); + + return NGX_CONF_OK; +} + + +static char * +ngx_http_mirror(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_http_mirror_loc_conf_t *mlcf = conf; + + ngx_str_t *value, *s; + + value = cf->args->elts; + + if (ngx_strcmp(value[1].data, "off") == 0) { + if (mlcf->mirror != NGX_CONF_UNSET_PTR) { + return "is duplicate"; + } + + mlcf->mirror = NULL; + return NGX_CONF_OK; + } + + if (mlcf->mirror == NULL) { + return "is duplicate"; + } + + if (mlcf->mirror == NGX_CONF_UNSET_PTR) { + mlcf->mirror = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t)); + if (mlcf->mirror == NULL) { + return NGX_CONF_ERROR; + } + } + + s = ngx_array_push(mlcf->mirror); + if (s == NULL) { + return NGX_CONF_ERROR; + } + + *s = value[1]; + + return NGX_CONF_OK; +} + + +static ngx_int_t +ngx_http_mirror_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_PRECONTENT_PHASE].handlers); + if (h == NULL) { + return NGX_ERROR; + } + + *h = ngx_http_mirror_handler; + + return NGX_OK; +} |