|
| 1 | + |
| 2 | +/* |
| 3 | + * Copyright (C) Hanada <im@hanada.info> |
| 4 | + * Copyright (C) Arcadiy Ivanov (arcivanov) |
| 5 | + * Copyright (C) OpenResty Inc. |
| 6 | + */ |
| 7 | + |
| 8 | + |
| 9 | +#ifndef DDEBUG |
| 10 | +#define DDEBUG 0 |
| 11 | +#endif |
| 12 | +#include "ddebug.h" |
| 13 | + |
| 14 | + |
| 15 | +#include <nginx.h> |
| 16 | +#include "ngx_stream_lua_accessby.h" |
| 17 | +#include "ngx_stream_lua_util.h" |
| 18 | +#include "ngx_stream_lua_exception.h" |
| 19 | +#include "ngx_stream_lua_cache.h" |
| 20 | + |
| 21 | + |
| 22 | +static ngx_int_t ngx_stream_lua_access_by_chunk(lua_State *L, |
| 23 | + ngx_stream_lua_request_t *r); |
| 24 | + |
| 25 | + |
| 26 | +ngx_int_t |
| 27 | +ngx_stream_lua_access_handler(ngx_stream_session_t *s) |
| 28 | +{ |
| 29 | + ngx_int_t rc; |
| 30 | + ngx_stream_lua_ctx_t *ctx; |
| 31 | + ngx_stream_lua_srv_conf_t *lscf; |
| 32 | + ngx_stream_lua_main_conf_t *lmcf; |
| 33 | + ngx_stream_lua_request_t *r; |
| 34 | + |
| 35 | + ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
| 36 | + "lua access handler"); |
| 37 | + |
| 38 | + lmcf = ngx_stream_get_module_main_conf(s, ngx_stream_lua_module); |
| 39 | + |
| 40 | + if (!lmcf->postponed_to_access_phase_end) { |
| 41 | + ngx_stream_core_main_conf_t *cmcf; |
| 42 | + ngx_stream_phase_handler_t tmp; |
| 43 | + ngx_stream_phase_handler_t *ph; |
| 44 | + ngx_stream_phase_handler_t *cur_ph; |
| 45 | + ngx_stream_phase_handler_t *last_ph; |
| 46 | + |
| 47 | + lmcf->postponed_to_access_phase_end = 1; |
| 48 | + |
| 49 | + cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); |
| 50 | + |
| 51 | + ph = cmcf->phase_engine.handlers; |
| 52 | + cur_ph = &ph[s->phase_handler]; |
| 53 | + last_ph = &ph[cur_ph->next - 1]; |
| 54 | + |
| 55 | + if (cur_ph < last_ph) { |
| 56 | + tmp = *cur_ph; |
| 57 | + |
| 58 | + ngx_memmove(cur_ph, cur_ph + 1, (last_ph - cur_ph) |
| 59 | + * sizeof (ngx_stream_phase_handler_t)); |
| 60 | + |
| 61 | + *last_ph = tmp; |
| 62 | + |
| 63 | + s->phase_handler--; /* redo the current ph */ |
| 64 | + |
| 65 | + return NGX_DECLINED; |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_lua_module); |
| 70 | + |
| 71 | + if (lscf->access_handler == NULL) { |
| 72 | + ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
| 73 | + "no acces handler found"); |
| 74 | + return NGX_DECLINED; |
| 75 | + } |
| 76 | + |
| 77 | + ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module); |
| 78 | + |
| 79 | + dd("ctx = %p", ctx); |
| 80 | + |
| 81 | + if (ctx == NULL) { |
| 82 | + ctx = ngx_stream_lua_create_ctx(s); |
| 83 | + if (ctx == NULL) { |
| 84 | + return NGX_STREAM_INTERNAL_SERVER_ERROR; |
| 85 | + } |
| 86 | + } |
| 87 | + |
| 88 | + r = ctx->request; |
| 89 | + |
| 90 | + dd("entered? %d", (int) ctx->entered_access_phase); |
| 91 | + |
| 92 | + if (ctx->entered_access_phase) { |
| 93 | + dd("calling wev handler"); |
| 94 | + rc = ctx->resume_handler(r); |
| 95 | + dd("wev handler returns %d", (int) rc); |
| 96 | + |
| 97 | + if (rc == NGX_ERROR || rc > NGX_OK) { |
| 98 | + ngx_stream_lua_finalize_request(ctx->request, rc); |
| 99 | + return NGX_DONE; |
| 100 | + } |
| 101 | + |
| 102 | + if (rc == NGX_OK || rc == NGX_DONE) { |
| 103 | + return rc; |
| 104 | + } |
| 105 | + |
| 106 | + return NGX_DECLINED; |
| 107 | + } |
| 108 | + |
| 109 | + r->connection->read->handler = ngx_stream_lua_request_handler; |
| 110 | + r->connection->write->handler = ngx_stream_lua_request_handler; |
| 111 | + |
| 112 | + dd("calling access handler"); |
| 113 | + rc = lscf->access_handler(r); |
| 114 | + |
| 115 | + if (rc == NGX_ERROR || rc > NGX_OK) { |
| 116 | + ngx_stream_lua_finalize_request(ctx->request, rc); |
| 117 | + return NGX_DONE; |
| 118 | + } |
| 119 | + |
| 120 | + return rc; |
| 121 | +} |
| 122 | + |
| 123 | + |
| 124 | +ngx_int_t |
| 125 | +ngx_stream_lua_access_handler_inline(ngx_stream_lua_request_t *r) |
| 126 | +{ |
| 127 | + ngx_int_t rc; |
| 128 | + lua_State *L; |
| 129 | + ngx_stream_lua_srv_conf_t *lscf; |
| 130 | + |
| 131 | + lscf = ngx_stream_lua_get_module_srv_conf(r, ngx_stream_lua_module); |
| 132 | + |
| 133 | + L = ngx_stream_lua_get_lua_vm(r, NULL); |
| 134 | + |
| 135 | + /* load Lua inline script (w/ cache) sp = 1 */ |
| 136 | + rc = ngx_stream_lua_cache_loadbuffer(r->connection->log, L, |
| 137 | + lscf->access_src.value.data, |
| 138 | + lscf->access_src.value.len, |
| 139 | + lscf->access_src_key, |
| 140 | + (const char *) lscf->access_chunkname); |
| 141 | + |
| 142 | + if (rc != NGX_OK) { |
| 143 | + return NGX_STREAM_INTERNAL_SERVER_ERROR; |
| 144 | + } |
| 145 | + |
| 146 | + return ngx_stream_lua_access_by_chunk(L, r); |
| 147 | +} |
| 148 | + |
| 149 | + |
| 150 | +ngx_int_t |
| 151 | +ngx_stream_lua_access_handler_file(ngx_stream_lua_request_t *r) |
| 152 | +{ |
| 153 | + u_char *script_path; |
| 154 | + ngx_int_t rc; |
| 155 | + ngx_str_t eval_src; |
| 156 | + lua_State *L; |
| 157 | + ngx_stream_lua_srv_conf_t *lscf; |
| 158 | + |
| 159 | + lscf = ngx_stream_lua_get_module_srv_conf(r, ngx_stream_lua_module); |
| 160 | + |
| 161 | + /* Eval nginx variables in code path string first */ |
| 162 | + if (ngx_stream_complex_value(r->session, &lscf->access_src, &eval_src) |
| 163 | + != NGX_OK) |
| 164 | + { |
| 165 | + return NGX_ERROR; |
| 166 | + } |
| 167 | + |
| 168 | + script_path = ngx_stream_lua_rebase_path(r->pool, eval_src.data, |
| 169 | + eval_src.len); |
| 170 | + |
| 171 | + if (script_path == NULL) { |
| 172 | + return NGX_ERROR; |
| 173 | + } |
| 174 | + |
| 175 | + L = ngx_stream_lua_get_lua_vm(r, NULL); |
| 176 | + |
| 177 | + /* load Lua script file (w/ cache) sp = 1 */ |
| 178 | + rc = ngx_stream_lua_cache_loadfile(r->connection->log, L, script_path, |
| 179 | + lscf->access_src_key); |
| 180 | + if (rc != NGX_OK) { |
| 181 | + return rc; |
| 182 | + } |
| 183 | + |
| 184 | + /* make sure we have a valid code chunk */ |
| 185 | + ngx_stream_lua_assert(lua_isfunction(L, -1)); |
| 186 | + |
| 187 | + return ngx_stream_lua_access_by_chunk(L, r); |
| 188 | +} |
| 189 | + |
| 190 | + |
| 191 | +static ngx_int_t |
| 192 | +ngx_stream_lua_access_by_chunk(lua_State *L, ngx_stream_lua_request_t *r) |
| 193 | +{ |
| 194 | + int co_ref; |
| 195 | + ngx_int_t rc; |
| 196 | + lua_State *co; |
| 197 | + ngx_event_t *rev; |
| 198 | + ngx_connection_t *c; |
| 199 | + ngx_stream_lua_ctx_t *ctx; |
| 200 | + ngx_stream_lua_cleanup_t *cln; |
| 201 | + |
| 202 | + ngx_stream_lua_srv_conf_t *lscf; |
| 203 | + |
| 204 | + /* {{{ new coroutine to handle request */ |
| 205 | + co = ngx_stream_lua_new_thread(r, L, &co_ref); |
| 206 | + |
| 207 | + if (co == NULL) { |
| 208 | + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| 209 | + "lua: failed to create new coroutine " |
| 210 | + "to handle request"); |
| 211 | + |
| 212 | + return NGX_STREAM_INTERNAL_SERVER_ERROR; |
| 213 | + } |
| 214 | + |
| 215 | + /* move code closure to new coroutine */ |
| 216 | + lua_xmove(L, co, 1); |
| 217 | + |
| 218 | +#ifndef OPENRESTY_LUAJIT |
| 219 | + /* set closure's env table to new coroutine's globals table */ |
| 220 | + ngx_stream_lua_get_globals_table(co); |
| 221 | + lua_setfenv(co, -2); |
| 222 | +#endif |
| 223 | + |
| 224 | + /* save nginx request in coroutine globals table */ |
| 225 | + ngx_stream_lua_set_req(co, r); |
| 226 | + |
| 227 | + /* {{{ initialize request context */ |
| 228 | + ctx = ngx_stream_lua_get_module_ctx(r, ngx_stream_lua_module); |
| 229 | + |
| 230 | + dd("ctx = %p", ctx); |
| 231 | + |
| 232 | + if (ctx == NULL) { |
| 233 | + return NGX_ERROR; |
| 234 | + } |
| 235 | + |
| 236 | + ngx_stream_lua_reset_ctx(r, L, ctx); |
| 237 | + |
| 238 | + ctx->entered_access_phase = 1; |
| 239 | + |
| 240 | + ctx->cur_co_ctx = &ctx->entry_co_ctx; |
| 241 | + ctx->cur_co_ctx->co = co; |
| 242 | + ctx->cur_co_ctx->co_ref = co_ref; |
| 243 | +#ifdef NGX_LUA_USE_ASSERT |
| 244 | + ctx->cur_co_ctx->co_top = 1; |
| 245 | +#endif |
| 246 | + |
| 247 | + ngx_stream_lua_attach_co_ctx_to_L(co, ctx->cur_co_ctx); |
| 248 | + |
| 249 | + /* }}} */ |
| 250 | + |
| 251 | + /* {{{ register request cleanup hooks */ |
| 252 | + if (ctx->cleanup == NULL) { |
| 253 | + cln = ngx_stream_lua_cleanup_add(r, 0); |
| 254 | + if (cln == NULL) { |
| 255 | + return NGX_STREAM_INTERNAL_SERVER_ERROR; |
| 256 | + } |
| 257 | + |
| 258 | + cln->handler = ngx_stream_lua_request_cleanup_handler; |
| 259 | + cln->data = ctx; |
| 260 | + ctx->cleanup = &cln->handler; |
| 261 | + } |
| 262 | + /* }}} */ |
| 263 | + |
| 264 | + ctx->context = NGX_STREAM_LUA_CONTEXT_ACCESS; |
| 265 | + |
| 266 | + lscf = ngx_stream_lua_get_module_srv_conf(r, ngx_stream_lua_module); |
| 267 | + |
| 268 | + if (lscf->check_client_abort) { |
| 269 | + r->read_event_handler = ngx_stream_lua_rd_check_broken_connection; |
| 270 | + |
| 271 | + rev = r->connection->read; |
| 272 | + |
| 273 | + if (!rev->active) { |
| 274 | + if (ngx_add_event(rev, NGX_READ_EVENT, 0) != NGX_OK) { |
| 275 | + return NGX_ERROR; |
| 276 | + } |
| 277 | + } |
| 278 | + |
| 279 | + } else { |
| 280 | + r->read_event_handler = ngx_stream_lua_block_reading; |
| 281 | + } |
| 282 | + |
| 283 | + rc = ngx_stream_lua_run_thread(L, r, ctx, 0); |
| 284 | + |
| 285 | + ngx_log_debug1(NGX_LOG_DEBUG_STREAM, r->connection->log, 0, |
| 286 | + "access run thread returned %d", (int) rc); |
| 287 | + |
| 288 | + if (rc == NGX_ERROR || rc > NGX_OK) { |
| 289 | + return rc; |
| 290 | + } |
| 291 | + |
| 292 | + c = r->connection; |
| 293 | + |
| 294 | + if (rc == NGX_AGAIN) { |
| 295 | + rc = ngx_stream_lua_run_posted_threads(c, L, r, ctx, 0); |
| 296 | + |
| 297 | + if (rc == NGX_ERROR || rc == NGX_DONE || rc > NGX_OK) { |
| 298 | + return rc; |
| 299 | + } |
| 300 | + |
| 301 | + if (rc != NGX_OK) { |
| 302 | + return NGX_DECLINED; |
| 303 | + } |
| 304 | + |
| 305 | + } else if (rc == NGX_DONE) { |
| 306 | + ngx_stream_lua_finalize_request(r, NGX_DONE); |
| 307 | + |
| 308 | + rc = ngx_stream_lua_run_posted_threads(c, L, r, ctx, 0); |
| 309 | + |
| 310 | + if (rc == NGX_ERROR || rc == NGX_DONE || rc > NGX_OK) { |
| 311 | + return rc; |
| 312 | + } |
| 313 | + |
| 314 | + if (rc != NGX_OK) { |
| 315 | + return NGX_DECLINED; |
| 316 | + } |
| 317 | + } |
| 318 | + |
| 319 | + if (rc == NGX_OK) { |
| 320 | + return NGX_OK; |
| 321 | + } |
| 322 | + |
| 323 | + return NGX_DECLINED; |
| 324 | +} |
| 325 | + |
| 326 | +/* vi:set ft=c ts=4 sw=4 et fdm=marker: */ |
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