1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 #include "http_core.h"
21 #include "http_config.h"
22 #include "http_protocol.h"
23 #include "http_request.h"
28 #include "apr_strings.h"
29 #include "apr_version.h"
32 module AP_MODULE_DECLARE_DATA serf_module;
33 static int mpm_supprts_serf = 0;
48 /* name -> serf_cluster_t* */
50 } serf_server_config_t;
58 apr_pool_t *serf_pool;
59 apr_bucket_brigade *tmpbb;
61 serf_ssl_context_t *ssl_ctx;
62 serf_bucket_alloc_t *bkt_alloc;
63 serf_bucket_t *body_bkt;
66 #if !APR_VERSION_AT_LEAST(1,4,0)
67 #define apr_time_from_msec(x) (x * 1000)
71 * This works right now because all timers are invoked in the single listener
72 * thread in the Event MPM -- the same thread that serf callbacks are made
73 * from, so we don't technically need a mutex yet, but with the Simple MPM,
74 * invocations are made from worker threads, and we need to figure out locking
76 static void timed_cleanup_callback(void *baton)
78 s_baton_t *ctx = baton;
80 /* Causes all serf connections to unregister from the event mpm */
82 ap_log_rerror(APLOG_MARK, APLOG_ERR, ctx->rstatus, ctx->r, APLOGNO(01119)
83 "serf: request returned: %d", ctx->rstatus);
84 ctx->r->status = HTTP_OK;
85 apr_pool_destroy(ctx->serf_pool);
86 ap_die(ctx->rstatus, ctx->r);
90 apr_brigade_cleanup(ctx->tmpbb);
91 e = apr_bucket_flush_create(ctx->r->connection->bucket_alloc);
92 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, e);
93 e = apr_bucket_eos_create(ctx->r->connection->bucket_alloc);
94 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, e);
96 /* TODO: return code? bleh */
97 ap_pass_brigade(ctx->r->output_filters, ctx->tmpbb);
99 apr_pool_destroy(ctx->serf_pool);
101 ap_finalize_request_protocol(ctx->r);
102 ap_process_request_after_handler(ctx->r);
107 static void closed_connection(serf_connection_t *conn,
112 s_baton_t *ctx = closed_baton;
115 /* justin says that error handling isn't done yet. hah. */
117 ap_log_rerror(APLOG_MARK, APLOG_ERR, why, ctx->r, APLOGNO(01120) "Closed Connection Error");
118 ctx->rstatus = HTTP_INTERNAL_SERVER_ERROR;
121 if (mpm_supprts_serf) {
122 ap_mpm_register_timed_callback(apr_time_from_msec(1),
123 timed_cleanup_callback, ctx);
125 ctx->keep_reading = 0;
128 static serf_bucket_t* conn_setup(apr_socket_t *sock,
133 s_baton_t *ctx = setup_baton;
135 c = serf_bucket_socket_create(sock, ctx->bkt_alloc);
137 c = serf_bucket_ssl_decrypt_create(c, ctx->ssl_ctx, ctx->bkt_alloc);
143 static int copy_headers_in(void *vbaton, const char *key, const char *value)
145 serf_bucket_t *hdrs_bkt = (serf_bucket_t *)vbaton;
147 /* XXXXX: List of headers not to copy to serf. serf's serf_bucket_headers_setn,
148 * doesn't actually overwrite a header if we set it once, so we need to ignore anything
149 * we might want to toggle or combine.
154 if (strcasecmp("Accept-Encoding", key) == 0) {
160 if (strcasecmp("Connection", key) == 0) {
166 if (strcasecmp("Host", key) == 0) {
172 if (strcasecmp("Keep-Alive", key) == 0) {
178 if (strcasecmp("TE", key) == 0) {
181 if (strcasecmp("Trailer", key) == 0) {
187 if (strcasecmp("Upgrade", key) == 0) {
195 serf_bucket_headers_setn(hdrs_bkt, key, value);
199 static int copy_headers_out(void *vbaton, const char *key, const char *value)
201 s_baton_t *ctx = vbaton;
204 /* XXXXX: Special Treatment required for MANY other headers. fixme.*/
208 if (strcasecmp("Content-Type", key) == 0) {
209 ap_set_content_type(ctx->r, value);
213 else if (strcasecmp("Connection", key) == 0) {
217 else if (strcasecmp("Content-Encoding", key) == 0) {
221 else if (strcasecmp("Content-Length", key) == 0) {
228 if (strcasecmp("Transfer-Encoding", key) == 0) {
238 apr_table_addn(ctx->r->headers_out, key, value);
244 static serf_bucket_t* accept_response(serf_request_t *request,
245 serf_bucket_t *stream,
246 void *acceptor_baton,
250 serf_bucket_alloc_t *bkt_alloc;
252 /* get the per-request bucket allocator */
253 bkt_alloc = serf_request_get_alloc(request);
255 /* Create a barrier so the response doesn't eat us! */
256 c = serf_bucket_barrier_create(stream, bkt_alloc);
258 return serf_bucket_response_create(c, bkt_alloc);
261 static apr_status_t handle_response(serf_request_t *request,
262 serf_bucket_t *response,
267 s_baton_t *ctx = vbaton;
272 if (response == NULL) {
273 ctx->rstatus = HTTP_INTERNAL_SERVER_ERROR;
277 /* XXXXXXX: Create better error message. */
278 rv = serf_bucket_response_status(response, &sl);
280 if (APR_STATUS_IS_EAGAIN(rv)) {
284 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, ctx->r, APLOGNO(01121) "serf_bucket_response_status...");
286 ctx->rstatus = HTTP_INTERNAL_SERVER_ERROR;
288 if (mpm_supprts_serf) {
289 ap_mpm_register_timed_callback(apr_time_from_msec(1),
290 timed_cleanup_callback, ctx);
297 * XXXXX: If I understood serf buckets better, it might be possible to not
298 * copy all of the data here, and better stream it to the client.
302 apr_brigade_cleanup(ctx->tmpbb);
303 rv = serf_bucket_read(response, AP_IOBUFSIZE, &data, &len);
305 if (SERF_BUCKET_READ_ERROR(rv)) {
306 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, ctx->r, APLOGNO(01122) "serf_bucket_read(response)");
310 if (!ctx->done_headers) {
312 serf_status_line line;
315 serf_bucket_response_status(response, &line);
316 ctx->r->status = line.code;
318 hdrs = serf_bucket_response_get_headers(response);
319 serf_bucket_headers_do(hdrs, copy_headers_out, ctx);
320 ctx->done_headers = 1;
325 /* TODO: make APR bucket <-> serf bucket stuff more magical. */
326 apr_brigade_write(ctx->tmpbb, NULL, NULL, data, len);
329 if (APR_STATUS_IS_EOF(rv)) {
330 ctx->keep_reading = 0;
332 ctx->rstatus = ap_pass_brigade(ctx->r->output_filters, ctx->tmpbb);
334 if (mpm_supprts_serf) {
335 ap_mpm_register_timed_callback(apr_time_from_msec(1),
336 timed_cleanup_callback, ctx);
341 ctx->rstatus = ap_pass_brigade(ctx->r->output_filters, ctx->tmpbb);
343 /* XXXX: Should we send a flush now? */
344 if (APR_STATUS_IS_EAGAIN(rv)) {
352 static apr_status_t setup_request(serf_request_t *request,
354 serf_bucket_t **req_bkt,
355 serf_response_acceptor_t *acceptor,
356 void **acceptor_baton,
357 serf_response_handler_t *handler,
358 void **handler_baton,
361 s_baton_t *ctx = vbaton;
362 serf_bucket_t *hdrs_bkt;
364 *req_bkt = serf_bucket_request_create(ctx->r->method, ctx->r->unparsed_uri,
366 serf_request_get_alloc(request));
368 hdrs_bkt = serf_bucket_request_get_headers(*req_bkt);
370 apr_table_do(copy_headers_in, hdrs_bkt, ctx->r->headers_in, NULL);
372 if (ctx->conf->preservehost) {
373 serf_bucket_headers_setn(hdrs_bkt, "Host",
374 apr_table_get(ctx->r->headers_in, "Host"));
377 serf_bucket_headers_setn(hdrs_bkt, "Host", ctx->conf->url.hostname);
380 serf_bucket_headers_setn(hdrs_bkt, "Accept-Encoding", "gzip");
383 if (ctx->ssl_ctx == NULL) {
384 *req_bkt = serf_bucket_ssl_encrypt_create(*req_bkt, NULL,
386 ctx->ssl_ctx = serf_bucket_ssl_encrypt_context_get(*req_bkt);
389 *req_bkt = serf_bucket_ssl_encrypt_create(*req_bkt, ctx->ssl_ctx,
394 *acceptor = accept_response;
395 *acceptor_baton = ctx;
396 *handler = handle_response;
397 *handler_baton = ctx;
402 /* TOOD: rewrite drive_serf to make it async */
403 static int drive_serf(request_rec *r, serf_config_t *conf)
407 apr_sockaddr_t *address;
408 s_baton_t *baton = apr_palloc(r->pool, sizeof(s_baton_t));
409 /* XXXXX: make persistent/per-process or something.*/
410 serf_context_t *serfme;
411 serf_connection_t *conn;
412 serf_server_config_t *ctx =
413 (serf_server_config_t *)ap_get_module_config(r->server->module_config,
416 /* Allocate everything out of a subpool, with a shorter lifetime than
417 * the main request, so that we can cleanup safely and remove our events
418 * from the main serf context in the async mpm mode.
420 apr_pool_create(&pool, r->pool);
421 if (strcmp(conf->url.scheme, "cluster") == 0) {
423 ap_serf_cluster_provider_t *cp;
424 serf_cluster_t *cluster;
425 apr_array_header_t *servers = NULL;
426 apr_uint32_t pick = 0;
427 ap_serf_server_t *choice;
429 /* TODO: could this be optimized in post-config to pre-setup the
430 * pointers to the right cluster inside the conf structure?
432 cluster = apr_hash_get(ctx->clusters,
434 APR_HASH_KEY_STRING);
436 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01123)
437 "SerfCluster: unable to find cluster %s", conf->url.hostname);
438 return HTTP_INTERNAL_SERVER_ERROR;
441 cp = ap_lookup_provider(AP_SERF_CLUSTER_PROVIDER, cluster->provider, "0");
444 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01124)
445 "SerfCluster: unable to find provider %s", cluster->provider);
446 return HTTP_INTERNAL_SERVER_ERROR;
449 if (cp->list_servers == NULL) {
450 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01125)
451 "SerfCluster: %s is missing list servers provider.", cluster->provider);
452 return HTTP_INTERNAL_SERVER_ERROR;
455 rc = cp->list_servers(cp->baton,
461 ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(01126)
462 "SerfCluster: %s list servers returned failure", cluster->provider);
463 return HTTP_INTERNAL_SERVER_ERROR;
466 if (servers == NULL || apr_is_empty_array(servers)) {
467 ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(01127)
468 "SerfCluster: %s failed to provide a list of servers", cluster->provider);
469 return HTTP_INTERNAL_SERVER_ERROR;
472 /* TOOD: restructure try all servers in the array !! */
473 pick = ap_random_pick(0, servers->nelts-1);
474 choice = APR_ARRAY_IDX(servers, pick, ap_serf_server_t *);
476 rv = apr_sockaddr_info_get(&address, choice->ip,
477 APR_UNSPEC, choice->port, 0,
481 /* XXXXX: cache dns? */
482 rv = apr_sockaddr_info_get(&address, conf->url.hostname,
483 APR_UNSPEC, conf->url.port, 0,
487 if (rv != APR_SUCCESS) {
488 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01128) "Unable to resolve: %s", conf->url.hostname);
489 return HTTP_INTERNAL_SERVER_ERROR;
492 if (mpm_supprts_serf) {
493 serfme = ap_lookup_provider("mpm_serf", "instance", "0");
495 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01129) "mpm lied to us about supporting serf.");
496 return HTTP_INTERNAL_SERVER_ERROR;
500 serfme = serf_context_create(pool);
505 baton->serf_pool = pool;
506 baton->bkt_alloc = serf_bucket_allocator_create(pool, NULL, NULL);
507 baton->body_bkt = NULL;
508 baton->ssl_ctx = NULL;
511 baton->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
512 baton->done_headers = 0;
513 baton->keep_reading = 1;
515 if (strcasecmp(conf->url.scheme, "https") == 0) {
522 rv = ap_setup_client_block(baton->r, REQUEST_CHUNKED_DECHUNK);
527 /* TODO: create custom serf bucket, which does async request body reads */
528 if (ap_should_client_block(r)) {
531 char buf[AP_IOBUFSIZE];
534 rv = apr_file_mktemp(&fp, "mod_serf_buffer.XXXXXX", 0, pool);
535 if (rv != APR_SUCCESS) {
536 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01130) "Unable to create temp request body buffer file.");
537 return HTTP_INTERNAL_SERVER_ERROR;
542 rv = ap_get_client_block(baton->r, buf, len);
544 rv = apr_file_write_full(fp, buf, rv, NULL);
546 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01131) "failed to read request body");
547 return HTTP_INTERNAL_SERVER_ERROR;
553 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01132) "failed to read request body");
554 return HTTP_INTERNAL_SERVER_ERROR;
557 apr_file_seek(fp, APR_SET, &flen);
558 baton->body_bkt = serf_bucket_file_create(fp, baton->bkt_alloc);
561 conn = serf_connection_create(serfme, address,
563 closed_connection, baton,
566 /* XXX: Is it correct that we don't use the returned serf_request_t? */
567 serf_connection_request_create(conn, setup_request, baton);
569 if (mpm_supprts_serf) {
574 rv = serf_context_run(serfme, SERF_DURATION_FOREVER, pool);
576 /* XXXX: Handle timeouts */
577 if (APR_STATUS_IS_TIMEUP(rv)) {
581 if (rv != APR_SUCCESS) {
582 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01133) "serf_context_run() for %pI", address);
583 return HTTP_INTERNAL_SERVER_ERROR;
586 serf_debug__closed_conn(baton->bkt_alloc);
587 } while (baton->keep_reading);
589 return baton->rstatus;
593 static int serf_handler(request_rec *r)
595 serf_config_t *conf = ap_get_module_config(r->per_dir_config,
602 return drive_serf(r, conf);
605 static int is_true(const char *w)
607 if (strcasecmp(w, "on") == 0 || strcmp(w, "1") == 0 ||
608 strcasecmp(w, "true") == 0)
615 static const char *add_pass(cmd_parms *cmd, void *vconf,
616 int argc, char *const argv[])
620 serf_config_t *conf = (serf_config_t *) vconf;
623 return "SerfPass must have at least a URI.";
626 rv = apr_uri_parse(cmd->pool, argv[0], &conf->url);
628 if (rv != APR_SUCCESS) {
629 return "Unable to parse SerfPass url.";
632 if (!conf->url.scheme) {
633 return "Need scheme part in url.";
636 /* XXXX: These are bugs in apr_uri_parse. Fixme. */
637 if (!conf->url.port) {
638 conf->url.port = apr_uri_port_of_scheme(conf->url.scheme);
641 if (!conf->url.path) {
642 conf->url.path = "/";
645 for (i = 1; i < argc; i++) {
646 const char *p = argv[i];
647 const char *x = ap_strchr_c(p, '=');
650 if (strncmp(p, "preservehost", x-p) == 0) {
651 conf->preservehost = is_true(x+1);
661 /* SerfCluster <name> <provider> <key=value_params_to_provider> ... */
663 static const char *add_cluster(cmd_parms *cmd, void *d,
664 int argc, char *const argv[])
667 ap_serf_cluster_provider_t *backend;
669 serf_cluster_t *cluster = NULL;
670 serf_server_config_t *ctx =
671 (serf_server_config_t *)ap_get_module_config(cmd->server->module_config,
674 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
681 return "SerfCluster must have at least a name and provider.";
684 cluster = apr_palloc(cmd->pool, sizeof(serf_cluster_t));
685 cluster->name = apr_pstrdup(cmd->pool, argv[0]);
686 cluster->provider = apr_pstrdup(cmd->pool, argv[1]);
687 cluster->params = apr_table_make(cmd->pool, 6);
689 backend = ap_lookup_provider(AP_SERF_CLUSTER_PROVIDER, cluster->provider, "0");
691 if (backend == NULL) {
692 return apr_psprintf(cmd->pool, "SerfCluster: unable to find "
693 "provider '%s'", cluster->provider);
696 for (i = 2; i < argc; i++) {
697 const char *p = argv[i];
698 const char *x = ap_strchr_c(p, '=');
700 if (x && strlen(p) > 1) {
701 apr_table_addn(cluster->params,
702 apr_pstrndup(cmd->pool, p, x-p),
706 apr_table_addn(cluster->params,
707 apr_pstrdup(cmd->pool, p),
712 if (backend->check_config == NULL) {
713 return apr_psprintf(cmd->pool, "SerfCluster: Provider '%s' failed to "
714 "provider a configuration checker",
718 rv = backend->check_config(backend->baton, cmd, cluster->params);
724 apr_hash_set(ctx->clusters, cluster->name, APR_HASH_KEY_STRING, cluster);
729 static void *create_dir_config(apr_pool_t *p, char *dummy)
731 serf_config_t *new = (serf_config_t *) apr_pcalloc(p, sizeof(serf_config_t));
733 new->preservehost = 1;
737 static void *create_server_config(apr_pool_t *p, server_rec *s)
739 serf_server_config_t *ctx =
740 (serf_server_config_t *) apr_pcalloc(p, sizeof(serf_server_config_t));
742 ctx->clusters = apr_hash_make(p);
747 static void * merge_server_config(apr_pool_t *p, void *basev, void *overridesv)
749 serf_server_config_t *ctx = apr_pcalloc(p, sizeof(serf_server_config_t));
750 serf_server_config_t *base = (serf_server_config_t *) basev;
751 serf_server_config_t *overrides = (serf_server_config_t *) overridesv;
753 ctx->clusters = apr_hash_overlay(p, base->clusters, overrides->clusters);
757 static const command_rec serf_cmds[] =
759 AP_INIT_TAKE_ARGV("SerfCluster", add_cluster, NULL, RSRC_CONF,
760 "Configure a cluster backend"),
761 AP_INIT_TAKE_ARGV("SerfPass", add_pass, NULL, OR_INDEXES,
762 "URL to reverse proxy to"),
766 typedef struct hb_table_baton_t {
771 static int hb_table_check(void *rec, const char *key, const char *value)
773 hb_table_baton_t *b = (hb_table_baton_t*)rec;
774 if (strcmp(key, "path") != 0) {
775 b->msg = apr_psprintf(b->p,
776 "SerfCluster Heartbeat Invalid parameter '%s'",
784 static const char* hb_config_check(void *baton,
790 if (apr_is_empty_table(params)) {
791 return "SerfCluster Heartbeat requires a path to the heartbeat information.";
797 apr_table_do(hb_table_check, &b, params, NULL);
806 typedef struct hb_server_t {
815 argstr_to_table(apr_pool_t *p, char *str, apr_table_t *parms)
821 key = apr_strtok(str, "&", &strtok_state);
823 value = strchr(key, '=');
825 *value = '\0'; /* Split the string in two */
826 value++; /* Skip passed the = */
831 ap_unescape_url(key);
832 ap_unescape_url(value);
833 apr_table_set(parms, key, value);
834 key = apr_strtok(NULL, "&", &strtok_state);
838 static apr_status_t read_heartbeats(const char *path,
839 apr_array_header_t *servers,
850 rv = apr_file_open(&fp, path, APR_READ|APR_BINARY|APR_BUFFERED,
851 APR_OS_DEFAULT, pool);
857 rv = apr_file_info_get(&fi, APR_FINFO_SIZE, fp);
866 apr_table_t *hbt = apr_table_make(pool, 10);
869 while (apr_file_gets(buf, sizeof(buf), fp) == APR_SUCCESS) {
880 /* line format: <IP> <query_string>\n */
881 t = strchr(buf, ' ');
886 ip = apr_pstrndup(pool, buf, t - buf);
888 server = apr_pcalloc(pool, sizeof(hb_server_t));
892 apr_table_clear(hbt);
894 argstr_to_table(pool, apr_pstrdup(pool, t), hbt);
896 if (apr_table_get(hbt, "busy")) {
897 server->busy = atoi(apr_table_get(hbt, "busy"));
900 if (apr_table_get(hbt, "ready")) {
901 server->ready = atoi(apr_table_get(hbt, "ready"));
904 if (apr_table_get(hbt, "lastseen")) {
905 server->seen = atoi(apr_table_get(hbt, "lastseen"));
908 if (apr_table_get(hbt, "port")) {
909 server->port = atoi(apr_table_get(hbt, "port"));
912 if (server->busy == 0 && server->ready != 0) {
913 /* Server has zero threads active, but lots of them ready,
914 * it likely just started up, so lets /4 the number ready,
915 * to prevent us from completely flooding it with all new
918 server->ready = server->ready / 4;
921 APR_ARRAY_PUSH(servers, hb_server_t *) = server;
928 static int hb_server_sort(const void *a_, const void *b_)
930 hb_server_t *a = (hb_server_t*)a_;
931 hb_server_t *b = (hb_server_t*)b_;
932 if (a->ready == b->ready) {
935 else if (a->ready > b->ready) {
943 static int hb_list_servers(void *baton,
946 apr_array_header_t **out_servers)
952 apr_array_header_t *tmpservers;
953 apr_array_header_t *servers;
954 const char *path = apr_table_get(params, "path");
956 apr_pool_create(&tpool, r->pool);
958 path = ap_server_root_relative(tpool, path);
960 tmpservers = apr_array_make(tpool, 32, sizeof(hb_server_t *));
961 rv = read_heartbeats(path, tmpservers, tpool);
964 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01134)
965 "SerfCluster: Heartbeat unable to read '%s'", path);
966 apr_pool_destroy(tpool);
967 return HTTP_INTERNAL_SERVER_ERROR;
970 qsort(tmpservers->elts, tmpservers->nelts, sizeof(hb_server_t *),
973 servers = apr_array_make(r->pool, tmpservers->nelts, sizeof(ap_serf_server_t *));
975 i < tmpservers->nelts;
980 hbs = APR_ARRAY_IDX(tmpservers, i, hb_server_t *);
981 if (hbs->ready > 0) {
982 x = apr_palloc(r->pool, sizeof(ap_serf_server_t));
983 x->ip = apr_pstrdup(r->pool, hbs->ip);
985 APR_ARRAY_PUSH(servers, ap_serf_server_t *) = x;
989 *out_servers = servers;
990 apr_pool_destroy(tpool);
994 static const ap_serf_cluster_provider_t builtin_heartbeat =
1004 static int static_table_check(void *rec, const char *key, const char *value)
1006 hb_table_baton_t *b = (hb_table_baton_t*)rec;
1007 if (strcmp(key, "hosts") != 0 &&
1008 strcmp(key, "order") != 0) {
1009 b->msg = apr_psprintf(b->p,
1010 "SerfCluster Static Invalid parameter '%s'",
1018 static const char* static_config_check(void *baton,
1020 apr_table_t *params)
1024 if (apr_is_empty_table(params)) {
1025 return "SerfCluster Static requires at least a host list.";
1031 apr_table_do(static_table_check, &b, params, NULL);
1037 if (apr_table_get(params, "hosts") == NULL) {
1038 return "SerfCluster Static requires at least a hosts parameter";
1043 static int static_list_servers(void *baton,
1045 apr_table_t *params,
1046 apr_array_header_t **out_servers)
1051 apr_array_header_t *servers;
1052 const char *hosts = apr_table_get(params, "hosts");
1053 const char *order = apr_table_get(params, "order");
1055 servers = apr_array_make(r->pool, 10, sizeof(ap_serf_server_t *));
1057 ip = apr_strtok(apr_pstrdup(r->pool, hosts), ",", &strtok_state);
1061 apr_port_t port = 0;
1063 rv = apr_parse_addr_port(&host_str, &scope_id, &port, ip, r->pool);
1065 ap_serf_server_t *s = apr_palloc(r->pool, sizeof(ap_serf_server_t));
1067 s->port = port ? port : 80;
1068 APR_ARRAY_PUSH(servers, ap_serf_server_t *) = s;
1070 ip = apr_strtok(NULL, ",", &strtok_state);
1073 if (strcmp(order, "random") == 0) {
1074 /* TODO: support order=random */
1077 *out_servers = servers;
1082 static const ap_serf_cluster_provider_t builtin_static =
1086 &static_config_check,
1087 &static_list_servers,
1092 static int serf_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
1095 rv = ap_mpm_query(AP_MPMQ_HAS_SERF, &mpm_supprts_serf);
1097 if (rv != APR_SUCCESS) {
1098 mpm_supprts_serf = 0;
1104 static void register_hooks(apr_pool_t *p)
1106 ap_register_provider(p, AP_SERF_CLUSTER_PROVIDER,
1107 "heartbeat", "0", &builtin_heartbeat);
1109 ap_register_provider(p, AP_SERF_CLUSTER_PROVIDER,
1110 "static", "0", &builtin_static);
1112 ap_hook_post_config(serf_post_config, NULL, NULL, APR_HOOK_MIDDLE);
1114 ap_hook_handler(serf_handler, NULL, NULL, APR_HOOK_FIRST);
1117 AP_DECLARE_MODULE(serf) =
1119 STANDARD20_MODULE_STUFF,
1122 create_server_config,
1123 merge_server_config,