Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Stream filters related variables and functions. |
| 3 | * |
| 4 | * Copyright (C) 2015 Qualys Inc., Christopher Faulet <cfaulet@qualys.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <common/buffer.h> |
| 14 | #include <common/cfgparse.h> |
| 15 | #include <common/mini-clist.h> |
| 16 | #include <common/standard.h> |
| 17 | |
| 18 | #include <types/compression.h> |
| 19 | #include <types/filters.h> |
| 20 | #include <types/proto_http.h> |
| 21 | #include <types/proxy.h> |
| 22 | #include <types/sample.h> |
| 23 | |
| 24 | #include <proto/compression.h> |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 25 | #include <proto/filters.h> |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 26 | #include <proto/hdr_idx.h> |
| 27 | #include <proto/proto_http.h> |
| 28 | #include <proto/sample.h> |
| 29 | #include <proto/stream.h> |
| 30 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 31 | static const char *http_comp_flt_id = "compression filter"; |
| 32 | |
| 33 | struct flt_ops comp_ops; |
| 34 | |
| 35 | static struct buffer *tmpbuf = &buf_empty; |
| 36 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 37 | struct comp_state { |
| 38 | struct comp_ctx *comp_ctx; /* compression context */ |
| 39 | struct comp_algo *comp_algo; /* compression algorithm if not NULL */ |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 40 | int sov; |
| 41 | int consumed; |
| 42 | int initialized; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 43 | }; |
| 44 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 45 | static int select_compression_request_header(struct comp_state *st, |
| 46 | struct stream *s, |
| 47 | struct http_msg *msg); |
| 48 | static int select_compression_response_header(struct comp_state *st, |
| 49 | struct stream *s, |
| 50 | struct http_msg *msg); |
| 51 | |
| 52 | static int http_compression_buffer_init(struct buffer *in, struct buffer *out); |
| 53 | static int http_compression_buffer_add_data(struct comp_state *st, |
| 54 | struct buffer *in, |
| 55 | struct buffer *out, int sz); |
| 56 | static int http_compression_buffer_end(struct comp_state *st, struct stream *s, |
| 57 | struct buffer **in, struct buffer **out, |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 58 | int end); |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 59 | |
| 60 | /***********************************************************************/ |
| 61 | static int |
| 62 | comp_flt_init(struct proxy *px, struct filter *filter) |
| 63 | { |
| 64 | |
| 65 | /* We need a compression buffer in the DATA state to put the output of |
| 66 | * compressed data, and in CRLF state to let the TRAILERS state finish |
| 67 | * the job of removing the trailing CRLF. |
| 68 | */ |
| 69 | if (!tmpbuf->size) { |
| 70 | if (b_alloc(&tmpbuf) == NULL) |
| 71 | return -1; |
| 72 | } |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static void |
| 77 | comp_flt_deinit(struct proxy *px, struct filter *filter) |
| 78 | { |
| 79 | if (tmpbuf->size) |
| 80 | b_free(&tmpbuf); |
| 81 | } |
| 82 | |
| 83 | static int |
| 84 | comp_start_analyze(struct stream *s, struct filter *filter, struct channel *chn) |
| 85 | { |
| 86 | if (filter->ctx == NULL) { |
| 87 | struct comp_state *st; |
| 88 | |
| 89 | if (!(st = malloc(sizeof(*st)))) |
| 90 | return -1; |
| 91 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 92 | st->comp_algo = NULL; |
| 93 | st->comp_ctx = NULL; |
| 94 | st->sov = 0; |
| 95 | st->consumed = 0; |
| 96 | st->initialized = 0; |
| 97 | filter->ctx = st; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 98 | } |
| 99 | return 1; |
| 100 | } |
| 101 | |
| 102 | static int |
| 103 | comp_analyze(struct stream *s, struct filter *filter, struct channel *chn, |
| 104 | unsigned int an_bit) |
| 105 | { |
| 106 | struct comp_state *st = filter->ctx; |
| 107 | |
| 108 | if (!strm_fe(s)->comp && !s->be->comp) |
| 109 | goto end; |
| 110 | |
| 111 | switch (an_bit) { |
| 112 | case AN_RES_HTTP_PROCESS_BE: |
| 113 | select_compression_response_header(st, s, &s->txn->rsp); |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 114 | if (st->comp_algo) |
| 115 | st->sov = s->txn->rsp.sov; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 116 | break; |
| 117 | } |
| 118 | end: |
| 119 | return 1; |
| 120 | } |
| 121 | |
| 122 | static int |
| 123 | comp_end_analyze(struct stream *s, struct filter *filter, struct channel *chn) |
| 124 | { |
| 125 | struct comp_state *st = filter->ctx; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 126 | |
| 127 | if (!st || !(chn->flags & CF_ISRESP)) |
| 128 | goto end; |
| 129 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 130 | if (!st->comp_algo || !s->txn->status) |
| 131 | goto release_ctx; |
| 132 | |
| 133 | if (strm_fe(s)->mode == PR_MODE_HTTP) |
| 134 | strm_fe(s)->fe_counters.p.http.comp_rsp++; |
| 135 | if ((s->flags & SF_BE_ASSIGNED) && (s->be->mode == PR_MODE_HTTP)) |
| 136 | s->be->be_counters.p.http.comp_rsp++; |
| 137 | |
| 138 | /* release any possible compression context */ |
| 139 | st->comp_algo->end(&st->comp_ctx); |
| 140 | |
| 141 | release_ctx: |
| 142 | free(st); |
| 143 | filter->ctx = NULL; |
| 144 | end: |
| 145 | return 1; |
| 146 | } |
| 147 | |
| 148 | static int |
| 149 | comp_http_headers(struct stream *s, struct filter *filter, |
| 150 | struct http_msg *msg) |
| 151 | { |
| 152 | struct comp_state *st = filter->ctx; |
| 153 | |
| 154 | if (strm_fe(s)->comp || s->be->comp) { |
| 155 | if (!(msg->chn->flags & CF_ISRESP)) |
| 156 | select_compression_request_header(st, s, msg); |
| 157 | } |
| 158 | return 1; |
| 159 | } |
| 160 | |
| 161 | static int |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 162 | comp_http_data(struct stream *s, struct filter *filter, struct http_msg *msg) |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 163 | { |
| 164 | struct comp_state *st = filter->ctx; |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 165 | unsigned int len; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 166 | int ret; |
| 167 | |
| 168 | if (!(msg->chn->flags & CF_ISRESP) || !st->comp_algo) { |
| 169 | flt_set_forward_data(filter, msg->chn); |
| 170 | return 1; |
| 171 | } |
| 172 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 173 | len = MIN(msg->chunk_len + msg->next, msg->chn->buf->i) - FLT_NXT(filter, msg->chn); |
| 174 | if (!len) |
| 175 | return len; |
| 176 | |
| 177 | if (!st->initialized) { |
| 178 | b_adv(msg->chn->buf, FLT_FWD(filter, msg->chn) + st->sov); |
| 179 | ret = http_compression_buffer_init(msg->chn->buf, tmpbuf); |
| 180 | b_rew(msg->chn->buf, FLT_FWD(filter, msg->chn) + st->sov); |
| 181 | if (ret < 0) { |
| 182 | msg->chn->flags |= CF_WAKE_WRITE; |
| 183 | return 0; |
| 184 | } |
| 185 | } |
| 186 | b_adv(msg->chn->buf, FLT_NXT(filter, msg->chn)); |
| 187 | ret = http_compression_buffer_add_data(st, msg->chn->buf, tmpbuf, len); |
| 188 | b_rew(msg->chn->buf, FLT_NXT(filter, msg->chn)); |
| 189 | if (ret < 0) |
| 190 | return ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 191 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 192 | st->initialized = 1; |
| 193 | msg->next += ret; |
| 194 | msg->chunk_len -= ret; |
| 195 | FLT_NXT(filter, msg->chn) = msg->next; |
| 196 | return 0; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | static int |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 200 | comp_http_chunk_trailers(struct stream *s, struct filter *filter, |
| 201 | struct http_msg *msg) |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 202 | { |
| 203 | struct comp_state *st = filter->ctx; |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 204 | int ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 205 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 206 | if (!(msg->chn->flags & CF_ISRESP) || !st->comp_algo) { |
| 207 | flt_set_forward_data(filter, msg->chn); |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 208 | return 1; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 209 | } |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 210 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 211 | if (!st->initialized) |
| 212 | return 1; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 213 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 214 | st->consumed = msg->next - st->sov; |
| 215 | b_adv(msg->chn->buf, FLT_FWD(filter, msg->chn) + st->sov); |
| 216 | ret = http_compression_buffer_end(st, s, &msg->chn->buf, &tmpbuf, 1); |
| 217 | if (ret < 0) |
| 218 | return ret; |
| 219 | |
| 220 | st->initialized = 0; |
| 221 | st->sov = 0; |
| 222 | msg->next = ret; |
| 223 | FLT_NXT(filter, msg->chn) = ret; |
| 224 | FLT_FWD(filter, msg->chn) = 0; |
| 225 | return 1; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 228 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 229 | static int |
| 230 | comp_http_forward_data(struct stream *s, struct filter *filter, |
| 231 | struct http_msg *msg, unsigned int len) |
| 232 | { |
| 233 | struct comp_state *st = filter->ctx; |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 234 | int ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 235 | |
| 236 | if (!(msg->chn->flags & CF_ISRESP) || !st->comp_algo) { |
| 237 | flt_set_forward_data(filter, msg->chn); |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 238 | ret = len; |
| 239 | return ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 240 | } |
| 241 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 242 | /* To work, previous filters MUST forward all data */ |
| 243 | if (FLT_FWD(filter, msg->chn) + len != FLT_NXT(filter, msg->chn)) { |
| 244 | Warning("HTTP compression failed: unexpected behavior of previous filters\n"); |
| 245 | return -1; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 246 | } |
| 247 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 248 | if (!st->initialized) { |
| 249 | ret = len; |
| 250 | st->sov = ((st->sov > ret) ? (st->sov-ret) : 0); |
| 251 | return ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 252 | } |
| 253 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 254 | st->consumed = len - st->sov; |
| 255 | b_adv(msg->chn->buf, FLT_FWD(filter, msg->chn) + st->sov); |
| 256 | ret = http_compression_buffer_end(st, s, &msg->chn->buf, &tmpbuf, |
| 257 | msg->msg_state == HTTP_MSG_ENDING); |
| 258 | if (ret < 0) |
| 259 | return ret; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 260 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 261 | st->initialized = 0; |
| 262 | st->sov = 0; |
| 263 | msg->next = ret; |
| 264 | FLT_NXT(filter, msg->chn) = ret; |
| 265 | FLT_FWD(filter, msg->chn) = 0; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 266 | return ret; |
| 267 | } |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 268 | |
| 269 | /***********************************************************************/ |
| 270 | /* |
| 271 | * Selects a compression algorithm depending on the client request. |
| 272 | */ |
| 273 | int |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 274 | select_compression_request_header(struct comp_state *st, struct stream *s, |
| 275 | struct http_msg *msg) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 276 | { |
| 277 | struct http_txn *txn = s->txn; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 278 | struct buffer *req = msg->chn->buf; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 279 | struct hdr_ctx ctx; |
| 280 | struct comp_algo *comp_algo = NULL; |
| 281 | struct comp_algo *comp_algo_back = NULL; |
| 282 | |
| 283 | /* Disable compression for older user agents announcing themselves as "Mozilla/4" |
| 284 | * unless they are known good (MSIE 6 with XP SP2, or MSIE 7 and later). |
| 285 | * See http://zoompf.com/2012/02/lose-the-wait-http-compression for more details. |
| 286 | */ |
| 287 | ctx.idx = 0; |
| 288 | if (http_find_header2("User-Agent", 10, req->p, &txn->hdr_idx, &ctx) && |
| 289 | ctx.vlen >= 9 && |
| 290 | memcmp(ctx.line + ctx.val, "Mozilla/4", 9) == 0 && |
| 291 | (ctx.vlen < 31 || |
| 292 | memcmp(ctx.line + ctx.val + 25, "MSIE ", 5) != 0 || |
| 293 | ctx.line[ctx.val + 30] < '6' || |
| 294 | (ctx.line[ctx.val + 30] == '6' && |
| 295 | (ctx.vlen < 54 || memcmp(ctx.line + 51, "SV1", 3) != 0)))) { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 296 | st->comp_algo = NULL; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | /* search for the algo in the backend in priority or the frontend */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 301 | if ((s->be->comp && (comp_algo_back = s->be->comp->algos)) || |
| 302 | (strm_fe(s)->comp && (comp_algo_back = strm_fe(s)->comp->algos))) { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 303 | int best_q = 0; |
| 304 | |
| 305 | ctx.idx = 0; |
| 306 | while (http_find_header2("Accept-Encoding", 15, req->p, &txn->hdr_idx, &ctx)) { |
| 307 | const char *qval; |
| 308 | int q; |
| 309 | int toklen; |
| 310 | |
| 311 | /* try to isolate the token from the optional q-value */ |
| 312 | toklen = 0; |
| 313 | while (toklen < ctx.vlen && http_is_token[(unsigned char)*(ctx.line + ctx.val + toklen)]) |
| 314 | toklen++; |
| 315 | |
| 316 | qval = ctx.line + ctx.val + toklen; |
| 317 | while (1) { |
| 318 | while (qval < ctx.line + ctx.val + ctx.vlen && http_is_lws[(unsigned char)*qval]) |
| 319 | qval++; |
| 320 | |
| 321 | if (qval >= ctx.line + ctx.val + ctx.vlen || *qval != ';') { |
| 322 | qval = NULL; |
| 323 | break; |
| 324 | } |
| 325 | qval++; |
| 326 | |
| 327 | while (qval < ctx.line + ctx.val + ctx.vlen && http_is_lws[(unsigned char)*qval]) |
| 328 | qval++; |
| 329 | |
| 330 | if (qval >= ctx.line + ctx.val + ctx.vlen) { |
| 331 | qval = NULL; |
| 332 | break; |
| 333 | } |
| 334 | if (strncmp(qval, "q=", MIN(ctx.line + ctx.val + ctx.vlen - qval, 2)) == 0) |
| 335 | break; |
| 336 | |
| 337 | while (qval < ctx.line + ctx.val + ctx.vlen && *qval != ';') |
| 338 | qval++; |
| 339 | } |
| 340 | |
| 341 | /* here we have qval pointing to the first "q=" attribute or NULL if not found */ |
| 342 | q = qval ? parse_qvalue(qval + 2, NULL) : 1000; |
| 343 | |
| 344 | if (q <= best_q) |
| 345 | continue; |
| 346 | |
| 347 | for (comp_algo = comp_algo_back; comp_algo; comp_algo = comp_algo->next) { |
| 348 | if (*(ctx.line + ctx.val) == '*' || |
| 349 | word_match(ctx.line + ctx.val, toklen, comp_algo->ua_name, comp_algo->ua_name_len)) { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 350 | st->comp_algo = comp_algo; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 351 | best_q = q; |
| 352 | break; |
| 353 | } |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | /* remove all occurrences of the header when "compression offload" is set */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 359 | if (st->comp_algo) { |
| 360 | if ((s->be->comp && s->be->comp->offload) || |
| 361 | (strm_fe(s)->comp && strm_fe(s)->comp->offload)) { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 362 | http_remove_header2(msg, &txn->hdr_idx, &ctx); |
| 363 | ctx.idx = 0; |
| 364 | while (http_find_header2("Accept-Encoding", 15, req->p, &txn->hdr_idx, &ctx)) { |
| 365 | http_remove_header2(msg, &txn->hdr_idx, &ctx); |
| 366 | } |
| 367 | } |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | /* identity is implicit does not require headers */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 372 | if ((s->be->comp && (comp_algo_back = s->be->comp->algos)) || |
| 373 | (strm_fe(s)->comp && (comp_algo_back = strm_fe(s)->comp->algos))) { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 374 | for (comp_algo = comp_algo_back; comp_algo; comp_algo = comp_algo->next) { |
| 375 | if (comp_algo->cfg_name_len == 8 && memcmp(comp_algo->cfg_name, "identity", 8) == 0) { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 376 | st->comp_algo = comp_algo; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 377 | return 1; |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 382 | st->comp_algo = NULL; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 383 | return 0; |
| 384 | } |
| 385 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 386 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 387 | /* |
| 388 | * Selects a comression algorithm depending of the server response. |
| 389 | */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 390 | static int |
| 391 | select_compression_response_header(struct comp_state *st, struct stream *s, struct http_msg *msg) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 392 | { |
| 393 | struct http_txn *txn = s->txn; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 394 | struct buffer *res = msg->chn->buf; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 395 | struct hdr_ctx ctx; |
| 396 | struct comp_type *comp_type; |
| 397 | |
| 398 | /* no common compression algorithm was found in request header */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 399 | if (st->comp_algo == NULL) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 400 | goto fail; |
| 401 | |
| 402 | /* HTTP < 1.1 should not be compressed */ |
| 403 | if (!(msg->flags & HTTP_MSGF_VER_11) || !(txn->req.flags & HTTP_MSGF_VER_11)) |
| 404 | goto fail; |
| 405 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 406 | if (txn->meth == HTTP_METH_HEAD) |
| 407 | goto fail; |
| 408 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 409 | /* compress 200,201,202,203 responses only */ |
| 410 | if ((txn->status != 200) && |
| 411 | (txn->status != 201) && |
| 412 | (txn->status != 202) && |
| 413 | (txn->status != 203)) |
| 414 | goto fail; |
| 415 | |
| 416 | |
| 417 | /* Content-Length is null */ |
| 418 | if (!(msg->flags & HTTP_MSGF_TE_CHNK) && msg->body_len == 0) |
| 419 | goto fail; |
| 420 | |
| 421 | /* content is already compressed */ |
| 422 | ctx.idx = 0; |
| 423 | if (http_find_header2("Content-Encoding", 16, res->p, &txn->hdr_idx, &ctx)) |
| 424 | goto fail; |
| 425 | |
| 426 | /* no compression when Cache-Control: no-transform is present in the message */ |
| 427 | ctx.idx = 0; |
| 428 | while (http_find_header2("Cache-Control", 13, res->p, &txn->hdr_idx, &ctx)) { |
| 429 | if (word_match(ctx.line + ctx.val, ctx.vlen, "no-transform", 12)) |
| 430 | goto fail; |
| 431 | } |
| 432 | |
| 433 | comp_type = NULL; |
| 434 | |
| 435 | /* we don't want to compress multipart content-types, nor content-types that are |
| 436 | * not listed in the "compression type" directive if any. If no content-type was |
| 437 | * found but configuration requires one, we don't compress either. Backend has |
| 438 | * the priority. |
| 439 | */ |
| 440 | ctx.idx = 0; |
| 441 | if (http_find_header2("Content-Type", 12, res->p, &txn->hdr_idx, &ctx)) { |
| 442 | if (ctx.vlen >= 9 && strncasecmp("multipart", ctx.line+ctx.val, 9) == 0) |
| 443 | goto fail; |
| 444 | |
| 445 | if ((s->be->comp && (comp_type = s->be->comp->types)) || |
| 446 | (strm_fe(s)->comp && (comp_type = strm_fe(s)->comp->types))) { |
| 447 | for (; comp_type; comp_type = comp_type->next) { |
| 448 | if (ctx.vlen >= comp_type->name_len && |
| 449 | strncasecmp(ctx.line+ctx.val, comp_type->name, comp_type->name_len) == 0) |
| 450 | /* this Content-Type should be compressed */ |
| 451 | break; |
| 452 | } |
| 453 | /* this Content-Type should not be compressed */ |
| 454 | if (comp_type == NULL) |
| 455 | goto fail; |
| 456 | } |
| 457 | } |
| 458 | else { /* no content-type header */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 459 | if ((s->be->comp && s->be->comp->types) || |
| 460 | (strm_fe(s)->comp && strm_fe(s)->comp->types)) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 461 | goto fail; /* a content-type was required */ |
| 462 | } |
| 463 | |
| 464 | /* limit compression rate */ |
| 465 | if (global.comp_rate_lim > 0) |
| 466 | if (read_freq_ctr(&global.comp_bps_in) > global.comp_rate_lim) |
| 467 | goto fail; |
| 468 | |
| 469 | /* limit cpu usage */ |
| 470 | if (idle_pct < compress_min_idle) |
| 471 | goto fail; |
| 472 | |
| 473 | /* initialize compression */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 474 | if (st->comp_algo->init(&st->comp_ctx, global.tune.comp_maxlevel) < 0) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 475 | goto fail; |
| 476 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 477 | /* remove Content-Length header */ |
| 478 | ctx.idx = 0; |
| 479 | if ((msg->flags & HTTP_MSGF_CNT_LEN) && http_find_header2("Content-Length", 14, res->p, &txn->hdr_idx, &ctx)) |
| 480 | http_remove_header2(msg, &txn->hdr_idx, &ctx); |
| 481 | |
| 482 | /* add Transfer-Encoding header */ |
| 483 | if (!(msg->flags & HTTP_MSGF_TE_CHNK)) |
| 484 | http_header_add_tail2(&txn->rsp, &txn->hdr_idx, "Transfer-Encoding: chunked", 26); |
| 485 | |
| 486 | /* |
| 487 | * Add Content-Encoding header when it's not identity encoding. |
| 488 | * RFC 2616 : Identity encoding: This content-coding is used only in the |
| 489 | * Accept-Encoding header, and SHOULD NOT be used in the Content-Encoding |
| 490 | * header. |
| 491 | */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 492 | if (st->comp_algo->cfg_name_len != 8 || memcmp(st->comp_algo->cfg_name, "identity", 8) != 0) { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 493 | trash.len = 18; |
| 494 | memcpy(trash.str, "Content-Encoding: ", trash.len); |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 495 | memcpy(trash.str + trash.len, st->comp_algo->ua_name, st->comp_algo->ua_name_len); |
| 496 | trash.len += st->comp_algo->ua_name_len; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 497 | trash.str[trash.len] = '\0'; |
| 498 | http_header_add_tail2(&txn->rsp, &txn->hdr_idx, trash.str, trash.len); |
| 499 | } |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 500 | msg->flags |= HTTP_MSGF_COMPRESSING; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 501 | return 1; |
| 502 | |
| 503 | fail: |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 504 | st->comp_algo = NULL; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 505 | return 0; |
| 506 | } |
| 507 | |
| 508 | /***********************************************************************/ |
| 509 | /* emit the chunksize followed by a CRLF on the output and return the number of |
| 510 | * bytes written. It goes backwards and starts with the byte before <end>. It |
| 511 | * returns the number of bytes written which will not exceed 10 (8 digits, CR, |
| 512 | * and LF). The caller is responsible for ensuring there is enough room left in |
| 513 | * the output buffer for the string. |
| 514 | */ |
| 515 | static int |
| 516 | http_emit_chunk_size(char *end, unsigned int chksz) |
| 517 | { |
| 518 | char *beg = end; |
| 519 | |
| 520 | *--beg = '\n'; |
| 521 | *--beg = '\r'; |
| 522 | do { |
| 523 | *--beg = hextab[chksz & 0xF]; |
| 524 | } while (chksz >>= 4); |
| 525 | return end - beg; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Init HTTP compression |
| 530 | */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 531 | static int |
| 532 | http_compression_buffer_init(struct buffer *in, struct buffer *out) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 533 | { |
| 534 | /* output stream requires at least 10 bytes for the gzip header, plus |
| 535 | * at least 8 bytes for the gzip trailer (crc+len), plus a possible |
| 536 | * plus at most 5 bytes per 32kB block and 2 bytes to close the stream. |
| 537 | */ |
| 538 | if (in->size - buffer_len(in) < 20 + 5 * ((in->i + 32767) >> 15)) |
| 539 | return -1; |
| 540 | |
| 541 | /* prepare an empty output buffer in which we reserve enough room for |
| 542 | * copying the output bytes from <in>, plus 10 extra bytes to write |
| 543 | * the chunk size. We don't copy the bytes yet so that if we have to |
| 544 | * cancel the operation later, it's cheap. |
| 545 | */ |
| 546 | b_reset(out); |
| 547 | out->o = in->o; |
| 548 | out->p += out->o; |
| 549 | out->i = 10; |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Add data to compress |
| 555 | */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 556 | static int |
| 557 | http_compression_buffer_add_data(struct comp_state *st, struct buffer *in, |
| 558 | struct buffer *out, int sz) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 559 | { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 560 | int consumed_data = 0; |
| 561 | int data_process_len; |
| 562 | int block1, block2; |
| 563 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 564 | if (!sz) |
| 565 | return 0; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 566 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 567 | /* select the smallest size between the announced chunk size, the input |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 568 | * data, and the available output buffer size. The compressors are |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 569 | * assumed to be able to process all the bytes we pass to them at |
| 570 | * once. */ |
| 571 | data_process_len = sz; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 572 | data_process_len = MIN(out->size - buffer_len(out), data_process_len); |
| 573 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 574 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 575 | block1 = data_process_len; |
| 576 | if (block1 > bi_contig_data(in)) |
| 577 | block1 = bi_contig_data(in); |
| 578 | block2 = data_process_len - block1; |
| 579 | |
| 580 | /* compressors return < 0 upon error or the amount of bytes read */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 581 | consumed_data = st->comp_algo->add_data(st->comp_ctx, bi_ptr(in), block1, out); |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 582 | if (consumed_data >= 0 && block2 > 0) { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 583 | consumed_data = st->comp_algo->add_data(st->comp_ctx, in->data, block2, out); |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 584 | if (consumed_data >= 0) |
| 585 | consumed_data += block1; |
| 586 | } |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 587 | return consumed_data; |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * Flush data in process, and write the header and footer of the chunk. Upon |
| 592 | * success, in and out buffers are swapped to avoid a copy. |
| 593 | */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 594 | static int |
| 595 | http_compression_buffer_end(struct comp_state *st, struct stream *s, |
| 596 | struct buffer **in, struct buffer **out, |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 597 | int end) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 598 | { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 599 | struct buffer *ib = *in, *ob = *out; |
| 600 | char *tail; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 601 | int to_forward, left; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 602 | |
| 603 | #if defined(USE_SLZ) || defined(USE_ZLIB) |
| 604 | int ret; |
| 605 | |
| 606 | /* flush data here */ |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 607 | if (end) |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 608 | ret = st->comp_algo->finish(st->comp_ctx, ob); /* end of data */ |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 609 | else |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 610 | ret = st->comp_algo->flush(st->comp_ctx, ob); /* end of buffer */ |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 611 | |
| 612 | if (ret < 0) |
| 613 | return -1; /* flush failed */ |
| 614 | |
| 615 | #endif /* USE_ZLIB */ |
| 616 | |
| 617 | if (ob->i == 10) { |
| 618 | /* No data were appended, let's drop the output buffer and |
| 619 | * keep the input buffer unchanged. |
| 620 | */ |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | /* OK so at this stage, we have an output buffer <ob> looking like this : |
| 625 | * |
| 626 | * <-- o --> <------ i -----> |
| 627 | * +---------+---+------------+-----------+ |
| 628 | * | out | c | comp_in | empty | |
| 629 | * +---------+---+------------+-----------+ |
| 630 | * data p size |
| 631 | * |
| 632 | * <out> is the room reserved to copy ib->o. It starts at ob->data and |
| 633 | * has not yet been filled. <c> is the room reserved to write the chunk |
| 634 | * size (10 bytes). <comp_in> is the compressed equivalent of the data |
| 635 | * part of ib->i. <empty> is the amount of empty bytes at the end of |
| 636 | * the buffer, into which we may have to copy the remaining bytes from |
| 637 | * ib->i after the data (chunk size, trailers, ...). |
| 638 | */ |
| 639 | |
| 640 | /* Write real size at the begining of the chunk, no need of wrapping. |
| 641 | * We write the chunk using a dynamic length and adjust ob->p and ob->i |
| 642 | * accordingly afterwards. That will move <out> away from <data>. |
| 643 | */ |
| 644 | left = 10 - http_emit_chunk_size(ob->p + 10, ob->i - 10); |
| 645 | ob->p += left; |
| 646 | ob->i -= left; |
| 647 | |
| 648 | /* Copy previous data from ib->o into ob->o */ |
| 649 | if (ib->o > 0) { |
| 650 | left = bo_contig_data(ib); |
| 651 | memcpy(ob->p - ob->o, bo_ptr(ib), left); |
| 652 | if (ib->o - left) /* second part of the buffer */ |
| 653 | memcpy(ob->p - ob->o + left, ib->data, ib->o - left); |
| 654 | } |
| 655 | |
| 656 | /* chunked encoding requires CRLF after data */ |
| 657 | tail = ob->p + ob->i; |
| 658 | *tail++ = '\r'; |
| 659 | *tail++ = '\n'; |
| 660 | |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 661 | /* At the end of data, we must write the empty chunk 0<CRLF>, |
| 662 | * and terminate the trailers section with a last <CRLF>. If |
| 663 | * we're forwarding a chunked-encoded response, we'll have a |
| 664 | * trailers section after the empty chunk which needs to be |
| 665 | * forwarded and which will provide the last CRLF. Otherwise |
| 666 | * we write it ourselves. |
| 667 | */ |
| 668 | if (end) { |
| 669 | struct http_msg *msg = &s->txn->rsp; |
| 670 | |
| 671 | memcpy(tail, "0\r\n", 3); |
| 672 | tail += 3; |
| 673 | if (msg->msg_state == HTTP_MSG_ENDING) { |
| 674 | memcpy(tail, "\r\n", 2); |
| 675 | tail += 2; |
| 676 | } |
| 677 | } |
| 678 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 679 | ob->i = tail - ob->p; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 680 | to_forward = ob->i; |
| 681 | |
| 682 | /* update input rate */ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 683 | if (st->comp_ctx && st->comp_ctx->cur_lvl > 0) { |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 684 | update_freq_ctr(&global.comp_bps_in, st->consumed); |
| 685 | strm_fe(s)->fe_counters.comp_in += st->consumed; |
| 686 | s->be->be_counters.comp_in += st->consumed; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 687 | } else { |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 688 | strm_fe(s)->fe_counters.comp_byp += st->consumed; |
| 689 | s->be->be_counters.comp_byp += st->consumed; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | /* copy the remaining data in the tmp buffer. */ |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 693 | b_adv(ib, st->consumed); |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 694 | if (ib->i > 0) { |
| 695 | left = bi_contig_data(ib); |
| 696 | memcpy(ob->p + ob->i, bi_ptr(ib), left); |
| 697 | ob->i += left; |
| 698 | if (ib->i - left) { |
| 699 | memcpy(ob->p + ob->i, ib->data, ib->i - left); |
| 700 | ob->i += ib->i - left; |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | /* swap the buffers */ |
| 705 | *in = ob; |
| 706 | *out = ib; |
| 707 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 708 | |
| 709 | if (st->comp_ctx && st->comp_ctx->cur_lvl > 0) { |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 710 | update_freq_ctr(&global.comp_bps_out, to_forward); |
| 711 | strm_fe(s)->fe_counters.comp_out += to_forward; |
| 712 | s->be->be_counters.comp_out += to_forward; |
| 713 | } |
| 714 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 715 | return to_forward; |
| 716 | } |
| 717 | |
| 718 | |
| 719 | /***********************************************************************/ |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 720 | struct flt_ops comp_ops = { |
| 721 | .init = comp_flt_init, |
| 722 | .deinit = comp_flt_deinit, |
| 723 | |
| 724 | .channel_start_analyze = comp_start_analyze, |
| 725 | .channel_analyze = comp_analyze, |
| 726 | .channel_end_analyze = comp_end_analyze, |
| 727 | |
| 728 | .http_headers = comp_http_headers, |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 729 | .http_data = comp_http_data, |
Christopher Faulet | 2fb2880 | 2015-12-01 10:40:57 +0100 | [diff] [blame^] | 730 | .http_chunk_trailers = comp_http_chunk_trailers, |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 731 | .http_forward_data = comp_http_forward_data, |
| 732 | }; |
| 733 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 734 | static int |
| 735 | parse_compression_options(char **args, int section, struct proxy *proxy, |
| 736 | struct proxy *defpx, const char *file, int line, |
| 737 | char **err) |
| 738 | { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 739 | struct comp *comp; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 740 | |
| 741 | if (proxy->comp == NULL) { |
| 742 | comp = calloc(1, sizeof(struct comp)); |
| 743 | proxy->comp = comp; |
| 744 | } |
| 745 | else |
| 746 | comp = proxy->comp; |
| 747 | |
| 748 | if (!strcmp(args[1], "algo")) { |
| 749 | struct comp_ctx *ctx; |
| 750 | int cur_arg = 2; |
| 751 | |
| 752 | if (!*args[cur_arg]) { |
| 753 | memprintf(err, "parsing [%s:%d] : '%s' expects <algorithm>\n", |
| 754 | file, line, args[0]); |
| 755 | return -1; |
| 756 | } |
| 757 | while (*(args[cur_arg])) { |
| 758 | if (comp_append_algo(comp, args[cur_arg]) < 0) { |
| 759 | memprintf(err, "'%s' : '%s' is not a supported algorithm.\n", |
| 760 | args[0], args[cur_arg]); |
| 761 | return -1; |
| 762 | } |
| 763 | if (proxy->comp->algos->init(&ctx, 9) == 0) |
| 764 | proxy->comp->algos->end(&ctx); |
| 765 | else { |
| 766 | memprintf(err, "'%s' : Can't init '%s' algorithm.\n", |
| 767 | args[0], args[cur_arg]); |
| 768 | return -1; |
| 769 | } |
| 770 | cur_arg++; |
| 771 | continue; |
| 772 | } |
| 773 | } |
| 774 | else if (!strcmp(args[1], "offload")) |
| 775 | comp->offload = 1; |
| 776 | else if (!strcmp(args[1], "type")) { |
| 777 | int cur_arg = 2; |
| 778 | |
| 779 | if (!*args[cur_arg]) { |
| 780 | memprintf(err, "'%s' expects <type>\n", args[0]); |
| 781 | return -1; |
| 782 | } |
| 783 | while (*(args[cur_arg])) { |
| 784 | comp_append_type(comp, args[cur_arg]); |
| 785 | cur_arg++; |
| 786 | continue; |
| 787 | } |
| 788 | } |
| 789 | else { |
| 790 | memprintf(err, "'%s' expects 'algo', 'type' or 'offload'\n", |
| 791 | args[0]); |
| 792 | return -1; |
| 793 | } |
| 794 | |
| 795 | return 0; |
| 796 | } |
| 797 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 798 | static int |
| 799 | parse_http_comp_flt(char **args, int *cur_arg, struct proxy *px, |
| 800 | struct filter *filter, char **err) |
| 801 | { |
| 802 | struct filter *flt, *back; |
| 803 | |
| 804 | list_for_each_entry_safe(flt, back, &px->filters, list) { |
| 805 | if (flt->id == http_comp_flt_id) { |
| 806 | memprintf(err, "%s: Proxy supports only one compression filter\n", px->id); |
| 807 | return -1; |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | filter->id = http_comp_flt_id; |
| 812 | filter->conf = NULL; |
| 813 | filter->ops = &comp_ops; |
| 814 | (*cur_arg)++; |
| 815 | |
| 816 | return 0; |
| 817 | } |
| 818 | |
| 819 | |
| 820 | int |
| 821 | check_legacy_http_comp_flt(struct proxy *proxy) |
| 822 | { |
| 823 | struct filter *filter; |
| 824 | int err = 0; |
| 825 | |
| 826 | if (proxy->comp == NULL) |
| 827 | goto end; |
| 828 | if (!LIST_ISEMPTY(&proxy->filters)) { |
| 829 | list_for_each_entry(filter, &proxy->filters, list) { |
| 830 | if (filter->id == http_comp_flt_id) |
| 831 | goto end; |
| 832 | } |
| 833 | Alert("config: %s '%s': require an explicit filter declaration to use HTTP compression\n", |
| 834 | proxy_type_str(proxy), proxy->id); |
| 835 | err++; |
| 836 | goto end; |
| 837 | } |
| 838 | |
| 839 | filter = pool_alloc2(pool2_filter); |
| 840 | if (!filter) { |
| 841 | Alert("config: %s '%s': out of memory\n", |
| 842 | proxy_type_str(proxy), proxy->id); |
| 843 | err++; |
| 844 | goto end; |
| 845 | } |
| 846 | memset(filter, 0, sizeof(*filter)); |
| 847 | filter->id = http_comp_flt_id; |
| 848 | filter->conf = NULL; |
| 849 | filter->ops = &comp_ops; |
| 850 | LIST_ADDQ(&proxy->filters, &filter->list); |
| 851 | |
| 852 | end: |
| 853 | return err; |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * boolean, returns true if compression is used (either gzip or deflate) in the |
| 858 | * response. |
| 859 | */ |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 860 | static int |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 861 | smp_fetch_res_comp(const struct arg *args, struct sample *smp, const char *kw, |
| 862 | void *private) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 863 | { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 864 | struct http_txn *txn = smp->strm->txn; |
| 865 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 866 | smp->data.type = SMP_T_BOOL; |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 867 | smp->data.u.sint = (txn && (txn->rsp.flags & HTTP_MSGF_COMPRESSING)); |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 868 | return 1; |
| 869 | } |
| 870 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 871 | /* |
| 872 | * string, returns algo |
| 873 | */ |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 874 | static int |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 875 | smp_fetch_res_comp_algo(const struct arg *args, struct sample *smp, |
| 876 | const char *kw, void *private) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 877 | { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 878 | struct http_txn *txn = smp->strm->txn; |
| 879 | struct filter *filter; |
| 880 | struct comp_state *st; |
| 881 | |
| 882 | if (!(txn || !(txn->rsp.flags & HTTP_MSGF_COMPRESSING))) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 883 | return 0; |
| 884 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 885 | list_for_each_entry(filter, &smp->strm->strm_flt.filters, list) { |
| 886 | if (filter->id != http_comp_flt_id) |
| 887 | continue; |
| 888 | |
| 889 | if (!(st = filter->ctx)) |
| 890 | break; |
| 891 | |
| 892 | smp->data.type = SMP_T_STR; |
| 893 | smp->flags = SMP_F_CONST; |
| 894 | smp->data.u.str.str = st->comp_algo->cfg_name; |
| 895 | smp->data.u.str.len = st->comp_algo->cfg_name_len; |
| 896 | return 1; |
| 897 | } |
| 898 | return 0; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | /* Declare the config parser for "compression" keyword */ |
| 902 | static struct cfg_kw_list cfg_kws = {ILH, { |
| 903 | { CFG_LISTEN, "compression", parse_compression_options }, |
| 904 | { 0, NULL, NULL }, |
| 905 | } |
| 906 | }; |
| 907 | |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 908 | /* Declare the filter parser for "compression" keyword */ |
| 909 | static struct flt_kw_list filter_kws = { "COMP", { }, { |
| 910 | { "compression", parse_http_comp_flt }, |
| 911 | { NULL, NULL }, |
| 912 | } |
| 913 | }; |
| 914 | |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 915 | /* Note: must not be declared <const> as its list will be overwritten */ |
| 916 | static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, { |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 917 | { "res.comp", smp_fetch_res_comp, 0, NULL, SMP_T_BOOL, SMP_USE_HRSHP }, |
| 918 | { "res.comp_algo", smp_fetch_res_comp_algo, 0, NULL, SMP_T_STR, SMP_USE_HRSHP }, |
| 919 | { /* END */ }, |
| 920 | } |
| 921 | }; |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 922 | |
| 923 | __attribute__((constructor)) |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 924 | static void |
| 925 | __flt_http_comp_init(void) |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 926 | { |
| 927 | cfg_register_keywords(&cfg_kws); |
Christopher Faulet | 92d3638 | 2015-11-05 13:35:03 +0100 | [diff] [blame] | 928 | flt_register_keywords(&filter_kws); |
Christopher Faulet | 3d97c90 | 2015-12-09 14:59:38 +0100 | [diff] [blame] | 929 | sample_register_fetches(&sample_fetch_keywords); |
| 930 | } |