1 /* 2 * reqpool - request objects 3 * 4 * Copyright(c) 2020 Glenn Strauss gstrauss()gluelogic.com All rights reserved 5 * License: BSD 3-clause (same as lighttpd) 6 */ 7 #include "first.h" 8 #include "reqpool.h" 9 10 #include <stdlib.h> 11 12 #include "base.h" 13 #include "buffer.h" 14 #include "chunk.h" 15 #include "plugin.h" 16 #include "plugin_config.h" 17 #include "request.h" 18 #include "response.h" 19 20 21 void 22 request_init_data (request_st * const r, connection * const con, server * const srv) 23 { 24 chunkqueue_init(&r->write_queue); 25 chunkqueue_init(&r->read_queue); 26 chunkqueue_init(&r->reqbody_queue); 27 28 r->http_method = HTTP_METHOD_UNSET; 29 r->http_version = HTTP_VERSION_UNSET; 30 r->resp_header_len = 0; 31 r->loops_per_request = 0; 32 r->con = con; 33 r->tmp_buf = srv->tmp_buf; 34 r->resp_body_scratchpad = -1; 35 36 /* init plugin-specific per-request structures */ 37 r->plugin_ctx = calloc(1, (srv->plugins.used + 1) * sizeof(void *)); 38 force_assert(NULL != r->plugin_ctx); 39 40 r->cond_cache = calloc(srv->config_context->used, sizeof(cond_cache_t)); 41 force_assert(NULL != r->cond_cache); 42 43 #ifdef HAVE_PCRE_H 44 if (srv->config_context->used > 1) {/*(save 128b per con if no conditions)*/ 45 r->cond_match = 46 calloc(srv->config_context->used, sizeof(cond_match_t)); 47 force_assert(NULL != r->cond_match); 48 } 49 #endif 50 } 51 52 53 void 54 request_reset (request_st * const r) 55 { 56 plugins_call_handle_request_reset(r); 57 58 http_response_reset(r); 59 60 r->loops_per_request = 0; 61 62 r->h2state = 0; /* H2_STATE_IDLE */ 63 r->h2id = 0; 64 r->http_method = HTTP_METHOD_UNSET; 65 r->http_version = HTTP_VERSION_UNSET; 66 67 /*con->proto_default_port = 80;*//*set to default in connection_accepted()*/ 68 69 r->http_host = NULL; 70 r->reqbody_length = 0; 71 r->te_chunked = 0; 72 r->resp_body_scratchpad = -1; 73 r->rqst_htags = 0; 74 75 r->async_callback = 0; 76 r->error_handler_saved_status = 0; 77 /*r->error_handler_saved_method = HTTP_METHOD_UNSET;*/ 78 /*(error_handler_saved_method value is not valid 79 * unless error_handler_saved_status is set)*/ 80 81 buffer_clear(&r->uri.scheme); 82 83 if (r->rqst_header_len <= BUFFER_MAX_REUSE_SIZE) { 84 r->rqst_headers.used = 0; 85 /* (Note: total header size not recalculated on HANDLER_COMEBACK 86 * even if other request headers changed during processing) 87 * (While this might delay release of larger buffers, it is not 88 * expected to be the general case. For those systems where it 89 * is a typical case, the larger buffers are likely to be reused) */ 90 buffer_clear(&r->target); 91 buffer_clear(&r->pathinfo); 92 /*buffer_clear(&r->target_orig);*/ /* reset later; used by mod_status*/ 93 /*buffer_clear(&r->uri.path);*/ /* reset later; used by mod_status*/ 94 /*buffer_clear(&r->uri.query);*/ /* reset later; used by mod_status*/ 95 /*buffer_clear(&r->uri.authority);*//* reset later; used by mod_status*/ 96 /*buffer_clear(&r->server_name_buf);*//* reset when used */ 97 } 98 else { 99 buffer_reset(&r->target); 100 buffer_reset(&r->pathinfo); 101 /*buffer_reset(&r->target_orig);*/ /* reset later; used by mod_status*/ 102 /*buffer_reset(&r->uri.path);*/ /* reset later; used by mod_status*/ 103 /*buffer_reset(&r->uri.query);*/ /* reset later; used by mod_status*/ 104 /*buffer_clear(&r->uri.authority);*//* reset later; used by mod_status*/ 105 /*buffer_clear(&r->server_name_buf);*//* reset when used */ 106 array_reset_data_strings(&r->rqst_headers); 107 } 108 r->rqst_header_len = 0; 109 if (0 != r->env.used) 110 array_reset_data_strings(&r->env); 111 112 chunkqueue_reset(&r->reqbody_queue); 113 /* r->read_queue, r->write_queue are shared with con for HTTP/1.1 114 * but are different than con->read_queue, con->write_queue for HTTP/2 115 * For HTTP/1.1, when &r->read_queue == con->read_queue, r->read_queue 116 * is not cleared between requests since it might contain subsequent 117 * requests. (see also request_release()) */ 118 119 /* The cond_cache gets reset in response.c */ 120 /* config_cond_cache_reset(r); */ 121 } 122 123 124 #if 0 /* DEBUG_DEV */ 125 __attribute_cold__ 126 static void request_plugin_ctx_check(request_st * const r, server * const srv) { 127 /* plugins should have cleaned themselves up */ 128 for (uint32_t i = 0, used = srv->plugins.used; i < used; ++i) { 129 plugin *p = ((plugin **)(srv->plugins.ptr))[i]; 130 plugin_data_base *pd = p->data; 131 if (!pd) continue; 132 if (NULL == r->plugin_ctx[pd->id] 133 && NULL == r->con->plugin_ctx[pd->id]) continue; 134 log_error(r->conf.errh, __FILE__, __LINE__, 135 "missing cleanup in %s", p->name); 136 r->plugin_ctx[pd->id] = NULL; 137 r->con->plugin_ctx[pd->id] = NULL; 138 } 139 } 140 #endif 141 142 143 void 144 request_reset_ex (request_st * const r) 145 { 146 #if 0 /* DEBUG_DEV */ 147 /* plugins should have cleaned themselves up (id range: [1,used]) */ 148 connection * const con = r->con; 149 server * const srv = con->srv; 150 for (uint32_t i = 1; i <= srv->plugins.used; ++i) { 151 if (NULL != r->plugin_ctx[i] || NULL != con->plugin_ctx[i]) { 152 request_plugin_ctx_check(r, srv); 153 break; 154 } 155 } 156 #endif 157 158 buffer_clear(&r->uri.authority); 159 buffer_reset(&r->uri.path); 160 buffer_reset(&r->uri.query); 161 buffer_reset(&r->target_orig); 162 buffer_reset(&r->target); /*(see comments in request_reset())*/ 163 buffer_reset(&r->pathinfo); /*(see comments in request_reset())*/ 164 165 /* preserve; callers must handle changes */ 166 /*r->state = CON_STATE_CONNECT;*/ 167 } 168 169 170 void 171 request_free_data (request_st * const r) 172 { 173 chunkqueue_reset(&r->reqbody_queue); 174 chunkqueue_reset(&r->write_queue); 175 chunkqueue_reset(&r->read_queue); 176 array_free_data(&r->rqst_headers); 177 array_free_data(&r->resp_headers); 178 array_free_data(&r->env); 179 180 free(r->target.ptr); 181 free(r->target_orig.ptr); 182 183 free(r->uri.scheme.ptr); 184 free(r->uri.authority.ptr); 185 free(r->uri.path.ptr); 186 free(r->uri.query.ptr); 187 188 free(r->physical.doc_root.ptr); 189 free(r->physical.path.ptr); 190 free(r->physical.basedir.ptr); 191 free(r->physical.etag.ptr); 192 free(r->physical.rel_path.ptr); 193 194 free(r->pathinfo.ptr); 195 free(r->server_name_buf.ptr); 196 197 free(r->plugin_ctx); 198 free(r->cond_cache); 199 free(r->cond_match); 200 201 /* note: r is not zeroed here and r is not freed here */ 202 } 203 204 205 /* linked list of (request_st *) cached for reuse */ 206 static request_st *reqpool; 207 /* max num of (request_st *) to cache */ 208 static uint32_t reqspace; 209 210 211 void 212 request_pool_init (uint32_t sz) 213 { 214 reqspace = sz; 215 } 216 217 218 void 219 request_pool_free (void) 220 { 221 while (reqpool) { 222 request_st * const r = reqpool; 223 reqpool = (request_st *)r->con; /*(reuse r->con as next ptr)*/ 224 request_free_data(r); 225 free(r); 226 ++reqspace; 227 } 228 } 229 230 231 void 232 request_release (request_st * const r) 233 { 234 /* (For HTTP/1.1, r == &con->request, and so request_release() not called) 235 * r->read_queue, r->write_queue are shared with con for HTTP/1.1 236 * but are different than con->read_queue, con->write_queue for HTTP/2 237 * For HTTP/1.1, when &r->read_queue == con->read_queue, r->read_queue 238 * is not cleared between requests since it might contain subsequent 239 * requests. (see also request_reset()) */ 240 chunkqueue_reset(&r->read_queue); 241 242 /*(r->cond_cache and r->cond_match are re-init in h2_init_stream())*/ 243 244 request_reset(r); 245 request_reset_ex(r); 246 r->state = CON_STATE_CONNECT; 247 248 if (reqspace) { 249 --reqspace; 250 r->con = (connection *)reqpool; /*(reuse r->con as next ptr)*/ 251 reqpool = r; 252 } 253 else { 254 request_free_data(r); 255 free(r); 256 } 257 } 258 259 260 request_st * 261 request_acquire (connection * const con) 262 { 263 request_st *r = reqpool; 264 if (r) { 265 reqpool = (request_st *)r->con; /*(reuse r->con as next ptr)*/ 266 ++reqspace; 267 } 268 else { 269 r = calloc(1, sizeof(request_st)); 270 force_assert(r); 271 request_init_data(r, con, con->srv); 272 } 273 274 r->con = con; 275 r->tmp_buf = con->srv->tmp_buf; 276 return r; 277 } 278