265 lines
6.6 KiB
C
265 lines
6.6 KiB
C
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/*
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* Copyright (C) Roman Arutyunyan
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* Copyright (C) Nginx, Inc.
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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typedef struct {
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ngx_array_t *mirror;
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ngx_flag_t request_body;
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} ngx_http_mirror_loc_conf_t;
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typedef struct {
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ngx_int_t status;
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} ngx_http_mirror_ctx_t;
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static ngx_int_t ngx_http_mirror_handler(ngx_http_request_t *r);
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static void ngx_http_mirror_body_handler(ngx_http_request_t *r);
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static ngx_int_t ngx_http_mirror_handler_internal(ngx_http_request_t *r);
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static void *ngx_http_mirror_create_loc_conf(ngx_conf_t *cf);
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static char *ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent,
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void *child);
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static char *ngx_http_mirror(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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static ngx_int_t ngx_http_mirror_init(ngx_conf_t *cf);
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static ngx_command_t ngx_http_mirror_commands[] = {
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{ ngx_string("mirror"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_mirror,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("mirror_request_body"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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ngx_conf_set_flag_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_mirror_loc_conf_t, request_body),
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NULL },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_mirror_module_ctx = {
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NULL, /* preconfiguration */
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ngx_http_mirror_init, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_mirror_create_loc_conf, /* create location configuration */
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ngx_http_mirror_merge_loc_conf /* merge location configuration */
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};
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ngx_module_t ngx_http_mirror_module = {
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NGX_MODULE_V1,
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&ngx_http_mirror_module_ctx, /* module context */
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ngx_http_mirror_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_int_t
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ngx_http_mirror_handler(ngx_http_request_t *r)
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{
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ngx_int_t rc;
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ngx_http_mirror_ctx_t *ctx;
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ngx_http_mirror_loc_conf_t *mlcf;
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if (r != r->main) {
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return NGX_DECLINED;
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}
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mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module);
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if (mlcf->mirror == NULL) {
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return NGX_DECLINED;
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}
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "mirror handler");
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if (mlcf->request_body) {
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ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module);
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if (ctx) {
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return ctx->status;
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}
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ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_mirror_ctx_t));
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if (ctx == NULL) {
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return NGX_ERROR;
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}
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ctx->status = NGX_DONE;
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ngx_http_set_ctx(r, ctx, ngx_http_mirror_module);
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rc = ngx_http_read_client_request_body(r, ngx_http_mirror_body_handler);
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if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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return rc;
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}
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ngx_http_finalize_request(r, NGX_DONE);
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return NGX_DONE;
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}
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return ngx_http_mirror_handler_internal(r);
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}
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static void
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ngx_http_mirror_body_handler(ngx_http_request_t *r)
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{
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ngx_http_mirror_ctx_t *ctx;
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ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module);
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ctx->status = ngx_http_mirror_handler_internal(r);
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r->preserve_body = 1;
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r->write_event_handler = ngx_http_core_run_phases;
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ngx_http_core_run_phases(r);
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}
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static ngx_int_t
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ngx_http_mirror_handler_internal(ngx_http_request_t *r)
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{
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ngx_str_t *name;
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ngx_uint_t i;
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ngx_http_request_t *sr;
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ngx_http_mirror_loc_conf_t *mlcf;
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mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module);
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name = mlcf->mirror->elts;
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for (i = 0; i < mlcf->mirror->nelts; i++) {
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if (ngx_http_subrequest(r, &name[i], &r->args, &sr, NULL,
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NGX_HTTP_SUBREQUEST_BACKGROUND)
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!= NGX_OK)
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{
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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sr->header_only = 1;
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sr->method = r->method;
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sr->method_name = r->method_name;
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}
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return NGX_DECLINED;
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}
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static void *
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ngx_http_mirror_create_loc_conf(ngx_conf_t *cf)
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{
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ngx_http_mirror_loc_conf_t *mlcf;
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mlcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_mirror_loc_conf_t));
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if (mlcf == NULL) {
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return NULL;
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}
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mlcf->mirror = NGX_CONF_UNSET_PTR;
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mlcf->request_body = NGX_CONF_UNSET;
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return mlcf;
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}
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static char *
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ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_http_mirror_loc_conf_t *prev = parent;
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ngx_http_mirror_loc_conf_t *conf = child;
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ngx_conf_merge_ptr_value(conf->mirror, prev->mirror, NULL);
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ngx_conf_merge_value(conf->request_body, prev->request_body, 1);
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return NGX_CONF_OK;
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}
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static char *
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ngx_http_mirror(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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{
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ngx_http_mirror_loc_conf_t *mlcf = conf;
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ngx_str_t *value, *s;
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value = cf->args->elts;
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if (ngx_strcmp(value[1].data, "off") == 0) {
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if (mlcf->mirror != NGX_CONF_UNSET_PTR) {
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return "is duplicate";
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}
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mlcf->mirror = NULL;
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return NGX_CONF_OK;
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}
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if (mlcf->mirror == NULL) {
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return "is duplicate";
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}
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if (mlcf->mirror == NGX_CONF_UNSET_PTR) {
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mlcf->mirror = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
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if (mlcf->mirror == NULL) {
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return NGX_CONF_ERROR;
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}
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}
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s = ngx_array_push(mlcf->mirror);
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if (s == NULL) {
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return NGX_CONF_ERROR;
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}
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*s = value[1];
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return NGX_CONF_OK;
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}
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static ngx_int_t
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ngx_http_mirror_init(ngx_conf_t *cf)
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{
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ngx_http_handler_pt *h;
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ngx_http_core_main_conf_t *cmcf;
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cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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h = ngx_array_push(&cmcf->phases[NGX_HTTP_PRECONTENT_PHASE].handlers);
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if (h == NULL) {
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return NGX_ERROR;
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}
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*h = ngx_http_mirror_handler;
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return NGX_OK;
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}
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