diff options
Diffstat (limited to 'thirdparty/lws/server/ranges.c')
| -rw-r--r-- | thirdparty/lws/server/ranges.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/thirdparty/lws/server/ranges.c b/thirdparty/lws/server/ranges.c deleted file mode 100644 index bc1578d733..0000000000 --- a/thirdparty/lws/server/ranges.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * libwebsockets - small server side websockets and web server implementation - * - * RFC7233 ranges parser - * - * Copyright (C) 2016 Andy Green <andy@warmcat.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation: - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301 USA - */ - -#include "private-libwebsockets.h" - -/* - * RFC7233 examples - * - * o The first 500 bytes (byte offsets 0-499, inclusive): - * - * bytes=0-499 - * - * o The second 500 bytes (byte offsets 500-999, inclusive): - * - * bytes=500-999 - * - * o The final 500 bytes (byte offsets 9500-9999, inclusive): - * - * bytes=-500 - * - * Or: - * - * bytes=9500- - * - * o The first and last bytes only (bytes 0 and 9999): - * - * bytes=0-0,-1 - * - * o Other valid (but not canonical) specifications of the second 500 - * bytes (byte offsets 500-999, inclusive): - * - * bytes=500-600,601-999 - * bytes=500-700,601-999 - */ - -/* - * returns 1 if the range struct represents a usable range - * if no ranges header, you get one of these for the whole - * file. Otherwise you get one for each valid range in the - * header. - * - * returns 0 if no further valid range forthcoming; rp->state - * may be LWSRS_SYNTAX or LWSRS_COMPLETED - */ - -int -lws_ranges_next(struct lws_range_parsing *rp) -{ - static const char * const beq = "bytes="; - char c; - - while (1) { - - c = rp->buf[rp->pos]; - - switch (rp->state) { - case LWSRS_SYNTAX: - case LWSRS_COMPLETED: - return 0; - - case LWSRS_NO_ACTIVE_RANGE: - rp->state = LWSRS_COMPLETED; - return 0; - - case LWSRS_BYTES_EQ: // looking for "bytes=" - if (c != beq[rp->pos]) { - rp->state = LWSRS_SYNTAX; - return -1; - } - if (rp->pos == 5) - rp->state = LWSRS_FIRST; - break; - - case LWSRS_FIRST: - rp->start = 0; - rp->end = 0; - rp->start_valid = 0; - rp->end_valid = 0; - - rp->state = LWSRS_STARTING; - - // fallthru - - case LWSRS_STARTING: - if (c == '-') { - rp->state = LWSRS_ENDING; - break; - } - - if (!(c >= '0' && c <= '9')) { - rp->state = LWSRS_SYNTAX; - return 0; - } - rp->start = (rp->start * 10) + (c - '0'); - rp->start_valid = 1; - break; - - case LWSRS_ENDING: - if (c == ',' || c == '\0') { - rp->state = LWSRS_FIRST; - if (c == ',') - rp->pos++; - - /* - * By the end of this, start and end are - * always valid if the range still is - */ - - if (!rp->start_valid) { /* eg, -500 */ - if (rp->end > rp->extent) - rp->end = rp->extent; - - rp->start = rp->extent - rp->end; - rp->end = rp->extent - 1; - } else - if (!rp->end_valid) - rp->end = rp->extent - 1; - - rp->did_try = 1; - - /* end must be >= start or ignore it */ - if (rp->end < rp->start) { - if (c == ',') - break; - rp->state = LWSRS_COMPLETED; - return 0; - } - - return 1; /* issue range */ - } - - if (!(c >= '0' && c <= '9')) { - rp->state = LWSRS_SYNTAX; - return 0; - } - rp->end = (rp->end * 10) + (c - '0'); - rp->end_valid = 1; - break; - } - - rp->pos++; - } -} - -void -lws_ranges_reset(struct lws_range_parsing *rp) -{ - rp->pos = 0; - rp->ctr = 0; - rp->start = 0; - rp->end = 0; - rp->start_valid = 0; - rp->end_valid = 0; - rp->state = LWSRS_BYTES_EQ; -} - -/* - * returns count of valid ranges - */ -int -lws_ranges_init(struct lws *wsi, struct lws_range_parsing *rp, - unsigned long long extent) -{ - rp->agg = 0; - rp->send_ctr = 0; - rp->inside = 0; - rp->count_ranges = 0; - rp->did_try = 0; - lws_ranges_reset(rp); - rp->state = LWSRS_COMPLETED; - - rp->extent = extent; - - if (lws_hdr_copy(wsi, (char *)rp->buf, sizeof(rp->buf), - WSI_TOKEN_HTTP_RANGE) <= 0) - return 0; - - rp->state = LWSRS_BYTES_EQ; - - while (lws_ranges_next(rp)) { - rp->count_ranges++; - rp->agg += rp->end - rp->start + 1; - } - - lwsl_debug("%s: count %d\n", __func__, rp->count_ranges); - lws_ranges_reset(rp); - - if (rp->did_try && !rp->count_ranges) - return -1; /* "not satisfiable */ - - lws_ranges_next(rp); - - return rp->count_ranges; -} |