| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Simple URL decoding function | ||
| 3 | * Copyright (c) 2012 Antti Seppälä | ||
| 4 | * | ||
| 5 | * References: | ||
| 6 | * RFC 3986: Uniform Resource Identifier (URI): Generic Syntax | ||
| 7 | * T. Berners-Lee et al. The Internet Society, 2005 | ||
| 8 | * | ||
| 9 | * based on http://www.icosaedro.it/apache/urldecode.c | ||
| 10 | * from Umberto Salsi (salsi@icosaedro.it) | ||
| 11 | * | ||
| 12 | * This file is part of FFmpeg. | ||
| 13 | * | ||
| 14 | * FFmpeg is free software; you can redistribute it and/or | ||
| 15 | * modify it under the terms of the GNU Lesser General Public | ||
| 16 | * License as published by the Free Software Foundation; either | ||
| 17 | * version 2.1 of the License, or (at your option) any later version. | ||
| 18 | * | ||
| 19 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 22 | * Lesser General Public License for more details. | ||
| 23 | * | ||
| 24 | * You should have received a copy of the GNU Lesser General Public | ||
| 25 | * License along with FFmpeg; if not, write to the Free Software | ||
| 26 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include <string.h> | ||
| 30 | |||
| 31 | #include "libavutil/error.h" | ||
| 32 | #include "libavutil/macros.h" | ||
| 33 | #include "libavutil/mem.h" | ||
| 34 | #include "libavutil/avstring.h" | ||
| 35 | #include "urldecode.h" | ||
| 36 | |||
| 37 | ✗ | static size_t urldecode(char *dest, const char *url, size_t url_len, int decode_plus_sign) | |
| 38 | { | ||
| 39 | ✗ | size_t s = 0, d = 0; | |
| 40 | char c; | ||
| 41 | |||
| 42 | ✗ | while (s < url_len) { | |
| 43 | ✗ | c = url[s++]; | |
| 44 | |||
| 45 | ✗ | if (c == '%' && s + 1 < url_len) { | |
| 46 | ✗ | char c2 = url[s++]; | |
| 47 | ✗ | char c3 = url[s++]; | |
| 48 | ✗ | if (av_isxdigit(c2) && av_isxdigit(c3)) { | |
| 49 | ✗ | c2 = av_tolower(c2); | |
| 50 | ✗ | c3 = av_tolower(c3); | |
| 51 | |||
| 52 | ✗ | if (c2 <= '9') | |
| 53 | ✗ | c2 = c2 - '0'; | |
| 54 | else | ||
| 55 | ✗ | c2 = c2 - 'a' + 10; | |
| 56 | |||
| 57 | ✗ | if (c3 <= '9') | |
| 58 | ✗ | c3 = c3 - '0'; | |
| 59 | else | ||
| 60 | ✗ | c3 = c3 - 'a' + 10; | |
| 61 | |||
| 62 | ✗ | dest[d++] = 16 * c2 + c3; | |
| 63 | |||
| 64 | } else { /* %zz or something other invalid */ | ||
| 65 | ✗ | dest[d++] = c; | |
| 66 | ✗ | dest[d++] = c2; | |
| 67 | ✗ | dest[d++] = c3; | |
| 68 | } | ||
| 69 | ✗ | } else if (c == '+' && decode_plus_sign) { | |
| 70 | ✗ | dest[d++] = ' '; | |
| 71 | } else { | ||
| 72 | ✗ | dest[d++] = c; | |
| 73 | } | ||
| 74 | |||
| 75 | } | ||
| 76 | |||
| 77 | ✗ | return d; | |
| 78 | } | ||
| 79 | |||
| 80 | ✗ | char *ff_urldecode(const char *url, int decode_plus_sign) | |
| 81 | { | ||
| 82 | ✗ | char *dest = NULL; | |
| 83 | size_t url_len; | ||
| 84 | |||
| 85 | ✗ | if (!url) | |
| 86 | ✗ | return NULL; | |
| 87 | |||
| 88 | ✗ | url_len = strlen(url) + 1; | |
| 89 | ✗ | dest = av_malloc(url_len); | |
| 90 | |||
| 91 | ✗ | if (!dest) | |
| 92 | ✗ | return NULL; | |
| 93 | |||
| 94 | ✗ | urldecode(dest, url, url_len, decode_plus_sign); | |
| 95 | |||
| 96 | ✗ | return dest; | |
| 97 | } | ||
| 98 | |||
| 99 | ✗ | int ff_urldecode_len(char *dest, size_t dest_len, const char *url, size_t url_max_len, int decode_plus_sign) | |
| 100 | { | ||
| 101 | size_t written_bytes; | ||
| 102 | ✗ | size_t url_len = strlen(url); | |
| 103 | |||
| 104 | ✗ | url_len = FFMIN(url_len, url_max_len); | |
| 105 | |||
| 106 | ✗ | if (dest_len <= url_len) | |
| 107 | ✗ | return AVERROR(EINVAL); | |
| 108 | |||
| 109 | ✗ | written_bytes = urldecode(dest, url, url_len, decode_plus_sign); | |
| 110 | ✗ | dest[written_bytes] = '\0'; | |
| 111 | |||
| 112 | ✗ | return written_bytes; | |
| 113 | } | ||
| 114 |