379 lines
15 KiB
C++
379 lines
15 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/misc.h"
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#include "td/utils/algorithm.h"
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#include "td/utils/common.h"
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#include "td/utils/HttpUrl.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/Slice.h"
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#include "td/utils/utf8.h"
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#include <cstring>
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#include <limits>
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namespace td {
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string clean_name(string str, size_t max_length) {
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str = strip_empty_characters(str, max_length);
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size_t new_len = 0;
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bool is_previous_space = false;
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for (size_t i = 0; i < str.size(); i++) {
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if (str[i] == ' ' || str[i] == '\n') {
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if (!is_previous_space) {
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str[new_len++] = ' ';
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is_previous_space = true;
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}
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continue;
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}
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if (static_cast<unsigned char>(str[i]) == 0xC2 && static_cast<unsigned char>(str[i + 1]) == 0xA0) { //
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if (!is_previous_space) {
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str[new_len++] = ' ';
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is_previous_space = true;
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}
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i++;
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continue;
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}
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str[new_len++] = str[i];
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is_previous_space = false;
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}
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str.resize(new_len);
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return trim(str);
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}
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string clean_username(string str) {
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td::remove(str, '.');
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to_lower_inplace(str);
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return trim(str);
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}
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void replace_offending_characters(string &str) {
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// "(\xe2\x80\x8f|\xe2\x80\x8e){N}(\xe2\x80\x8f|\xe2\x80\x8e)" -> "(\xe2\x80\x8c){N}$2"
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auto s = MutableSlice(str).ubegin();
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for (size_t pos = 0; pos < str.size(); pos++) {
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if (s[pos] == 0xe2 && s[pos + 1] == 0x80 && (s[pos + 2] == 0x8e || s[pos + 2] == 0x8f)) {
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while (s[pos + 3] == 0xe2 && s[pos + 4] == 0x80 && (s[pos + 5] == 0x8e || s[pos + 5] == 0x8f)) {
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s[pos + 2] = static_cast<unsigned char>(0x8c);
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pos += 3;
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}
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pos += 2;
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}
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}
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}
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bool clean_input_string(string &str) {
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constexpr size_t LENGTH_LIMIT = 35000; // server side limit
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if (!check_utf8(str)) {
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return false;
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}
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size_t str_size = str.size();
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size_t new_size = 0;
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for (size_t pos = 0; pos < str_size; pos++) {
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unsigned char c = static_cast<unsigned char>(str[pos]);
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switch (c) {
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// remove control characters
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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// allow '\n'
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case 11:
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case 12:
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// ignore '\r'
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case 14:
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case 15:
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case 16:
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case 17:
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case 18:
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case 19:
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case 20:
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case 21:
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case 22:
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case 23:
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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case 29:
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case 30:
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case 31:
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case 32:
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str[new_size++] = ' ';
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break;
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case '\r':
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// skip
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break;
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default:
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// remove \xe2\x80[\xa8-\xae]
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if (c == 0xe2 && pos + 2 < str_size) {
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unsigned char next = static_cast<unsigned char>(str[pos + 1]);
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if (next == 0x80) {
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next = static_cast<unsigned char>(str[pos + 2]);
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if (0xa8 <= next && next <= 0xae) {
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pos += 2;
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break;
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}
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}
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}
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// remove vertical lines \xcc[\xb3\xbf\x8a]
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if (c == 0xcc && pos + 1 < str_size) {
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unsigned char next = static_cast<unsigned char>(str[pos + 1]);
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if (next == 0xb3 || next == 0xbf || next == 0x8a) {
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pos++;
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break;
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}
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}
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str[new_size++] = str[pos];
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break;
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}
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if (new_size >= LENGTH_LIMIT - 3 && is_utf8_character_first_code_unit(str[new_size - 1])) {
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new_size--;
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break;
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}
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}
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str.resize(new_size);
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replace_offending_characters(str);
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return true;
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}
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string strip_empty_characters(string str, size_t max_length, bool strip_rtlo) {
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static const char *space_characters[] = {u8"\u1680", u8"\u180E", u8"\u2000", u8"\u2001", u8"\u2002",
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u8"\u2003", u8"\u2004", u8"\u2005", u8"\u2006", u8"\u2007",
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u8"\u2008", u8"\u2009", u8"\u200A", u8"\u202E", u8"\u202F",
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u8"\u205F", u8"\u2800", u8"\u3000", u8"\uFFFC"};
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static bool can_be_first[std::numeric_limits<unsigned char>::max() + 1];
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static bool can_be_first_inited = [&] {
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for (auto space_ch : space_characters) {
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CHECK(std::strlen(space_ch) == 3);
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can_be_first[static_cast<unsigned char>(space_ch[0])] = true;
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}
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return true;
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}();
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CHECK(can_be_first_inited);
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// replace all occurences of space characters with a space
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size_t i = 0;
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while (i < str.size() && !can_be_first[static_cast<unsigned char>(str[i])]) {
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i++;
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}
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size_t new_len = i;
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while (i < str.size()) {
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if (can_be_first[static_cast<unsigned char>(str[i])] && i + 3 <= str.size()) {
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bool found = false;
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for (auto space_ch : space_characters) {
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if (space_ch[0] == str[i] && space_ch[1] == str[i + 1] && space_ch[2] == str[i + 2]) {
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if (static_cast<unsigned char>(str[i + 2]) != 0xAE || static_cast<unsigned char>(str[i + 1]) != 0x80 ||
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static_cast<unsigned char>(str[i]) != 0xE2 || strip_rtlo) {
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found = true;
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}
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break;
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}
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}
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if (found) {
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str[new_len++] = ' ';
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i += 3;
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continue;
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}
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}
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str[new_len++] = str[i++];
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}
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Slice trimmed = trim(utf8_truncate(trim(Slice(str.c_str(), new_len)), max_length));
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// check if there is some non-empty character, empty characters:
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// "\xE2\x80\x8B", ZERO WIDTH SPACE
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// "\xE2\x80\x8C", ZERO WIDTH NON-JOINER
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// "\xE2\x80\x8D", ZERO WIDTH JOINER
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// "\xE2\x80\x8E", LEFT-TO-RIGHT MARK
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// "\xE2\x80\x8F", RIGHT-TO-LEFT MARK
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// "\xE2\x80\xAE", RIGHT-TO-LEFT OVERRIDE
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// "\xEF\xBB\xBF", ZERO WIDTH NO-BREAK SPACE aka BYTE ORDER MARK
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// "\xC2\xA0", NO-BREAK SPACE
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for (i = 0;;) {
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if (i == trimmed.size()) {
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// if all characters are empty, return an empty string
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return string();
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}
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if (trimmed[i] == ' ' || trimmed[i] == '\n') {
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i++;
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continue;
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}
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if (static_cast<unsigned char>(trimmed[i]) == 0xE2 && static_cast<unsigned char>(trimmed[i + 1]) == 0x80) {
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auto next = static_cast<unsigned char>(trimmed[i + 2]);
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if ((0x8B <= next && next <= 0x8F) || next == 0xAE) {
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i += 3;
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continue;
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}
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}
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if (static_cast<unsigned char>(trimmed[i]) == 0xEF && static_cast<unsigned char>(trimmed[i + 1]) == 0xBB &&
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static_cast<unsigned char>(trimmed[i + 2]) == 0xBF) {
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i += 3;
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continue;
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}
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if (static_cast<unsigned char>(trimmed[i]) == 0xC2 && static_cast<unsigned char>(trimmed[i + 1]) == 0xA0) {
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i += 2;
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continue;
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}
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break;
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}
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return trimmed.str();
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}
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bool is_empty_string(const string &str) {
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return strip_empty_characters(str, str.size()).empty();
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}
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int32 get_vector_hash(const vector<uint32> &numbers) {
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uint32 acc = 0;
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for (auto number : numbers) {
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acc = acc * 20261 + number;
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}
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return static_cast<int32>(acc & 0x7FFFFFFF);
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}
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string get_emoji_fingerprint(uint64 num) {
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static const vector<Slice> emojis{
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u8"\U0001f609", u8"\U0001f60d", u8"\U0001f61b", u8"\U0001f62d", u8"\U0001f631", u8"\U0001f621", u8"\U0001f60e",
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u8"\U0001f634", u8"\U0001f635", u8"\U0001f608", u8"\U0001f62c", u8"\U0001f607", u8"\U0001f60f", u8"\U0001f46e",
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u8"\U0001f477", u8"\U0001f482", u8"\U0001f476", u8"\U0001f468", u8"\U0001f469", u8"\U0001f474", u8"\U0001f475",
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u8"\U0001f63b", u8"\U0001f63d", u8"\U0001f640", u8"\U0001f47a", u8"\U0001f648", u8"\U0001f649", u8"\U0001f64a",
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u8"\U0001f480", u8"\U0001f47d", u8"\U0001f4a9", u8"\U0001f525", u8"\U0001f4a5", u8"\U0001f4a4", u8"\U0001f442",
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u8"\U0001f440", u8"\U0001f443", u8"\U0001f445", u8"\U0001f444", u8"\U0001f44d", u8"\U0001f44e", u8"\U0001f44c",
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u8"\U0001f44a", u8"\u270c", u8"\u270b", u8"\U0001f450", u8"\U0001f446", u8"\U0001f447", u8"\U0001f449",
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u8"\U0001f448", u8"\U0001f64f", u8"\U0001f44f", u8"\U0001f4aa", u8"\U0001f6b6", u8"\U0001f3c3", u8"\U0001f483",
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u8"\U0001f46b", u8"\U0001f46a", u8"\U0001f46c", u8"\U0001f46d", u8"\U0001f485", u8"\U0001f3a9", u8"\U0001f451",
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u8"\U0001f452", u8"\U0001f45f", u8"\U0001f45e", u8"\U0001f460", u8"\U0001f455", u8"\U0001f457", u8"\U0001f456",
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u8"\U0001f459", u8"\U0001f45c", u8"\U0001f453", u8"\U0001f380", u8"\U0001f484", u8"\U0001f49b", u8"\U0001f499",
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u8"\U0001f49c", u8"\U0001f49a", u8"\U0001f48d", u8"\U0001f48e", u8"\U0001f436", u8"\U0001f43a", u8"\U0001f431",
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u8"\U0001f42d", u8"\U0001f439", u8"\U0001f430", u8"\U0001f438", u8"\U0001f42f", u8"\U0001f428", u8"\U0001f43b",
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u8"\U0001f437", u8"\U0001f42e", u8"\U0001f417", u8"\U0001f434", u8"\U0001f411", u8"\U0001f418", u8"\U0001f43c",
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u8"\U0001f427", u8"\U0001f425", u8"\U0001f414", u8"\U0001f40d", u8"\U0001f422", u8"\U0001f41b", u8"\U0001f41d",
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u8"\U0001f41c", u8"\U0001f41e", u8"\U0001f40c", u8"\U0001f419", u8"\U0001f41a", u8"\U0001f41f", u8"\U0001f42c",
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u8"\U0001f40b", u8"\U0001f410", u8"\U0001f40a", u8"\U0001f42b", u8"\U0001f340", u8"\U0001f339", u8"\U0001f33b",
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u8"\U0001f341", u8"\U0001f33e", u8"\U0001f344", u8"\U0001f335", u8"\U0001f334", u8"\U0001f333", u8"\U0001f31e",
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u8"\U0001f31a", u8"\U0001f319", u8"\U0001f30e", u8"\U0001f30b", u8"\u26a1", u8"\u2614", u8"\u2744", u8"\u26c4",
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u8"\U0001f300", u8"\U0001f308", u8"\U0001f30a", u8"\U0001f393", u8"\U0001f386", u8"\U0001f383", u8"\U0001f47b",
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u8"\U0001f385", u8"\U0001f384", u8"\U0001f381", u8"\U0001f388", u8"\U0001f52e", u8"\U0001f3a5", u8"\U0001f4f7",
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u8"\U0001f4bf", u8"\U0001f4bb", u8"\u260e", u8"\U0001f4e1", u8"\U0001f4fa", u8"\U0001f4fb", u8"\U0001f509",
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u8"\U0001f514", u8"\u23f3", u8"\u23f0", u8"\u231a", u8"\U0001f512", u8"\U0001f511", u8"\U0001f50e",
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u8"\U0001f4a1", u8"\U0001f526", u8"\U0001f50c", u8"\U0001f50b", u8"\U0001f6bf", u8"\U0001f6bd", u8"\U0001f527",
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u8"\U0001f528", u8"\U0001f6aa", u8"\U0001f6ac", u8"\U0001f4a3", u8"\U0001f52b", u8"\U0001f52a", u8"\U0001f48a",
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u8"\U0001f489", u8"\U0001f4b0", u8"\U0001f4b5", u8"\U0001f4b3", u8"\u2709", u8"\U0001f4eb", u8"\U0001f4e6",
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u8"\U0001f4c5", u8"\U0001f4c1", u8"\u2702", u8"\U0001f4cc", u8"\U0001f4ce", u8"\u2712", u8"\u270f",
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u8"\U0001f4d0", u8"\U0001f4da", u8"\U0001f52c", u8"\U0001f52d", u8"\U0001f3a8", u8"\U0001f3ac", u8"\U0001f3a4",
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u8"\U0001f3a7", u8"\U0001f3b5", u8"\U0001f3b9", u8"\U0001f3bb", u8"\U0001f3ba", u8"\U0001f3b8", u8"\U0001f47e",
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u8"\U0001f3ae", u8"\U0001f0cf", u8"\U0001f3b2", u8"\U0001f3af", u8"\U0001f3c8", u8"\U0001f3c0", u8"\u26bd",
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u8"\u26be", u8"\U0001f3be", u8"\U0001f3b1", u8"\U0001f3c9", u8"\U0001f3b3", u8"\U0001f3c1", u8"\U0001f3c7",
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u8"\U0001f3c6", u8"\U0001f3ca", u8"\U0001f3c4", u8"\u2615", u8"\U0001f37c", u8"\U0001f37a", u8"\U0001f377",
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u8"\U0001f374", u8"\U0001f355", u8"\U0001f354", u8"\U0001f35f", u8"\U0001f357", u8"\U0001f371", u8"\U0001f35a",
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u8"\U0001f35c", u8"\U0001f361", u8"\U0001f373", u8"\U0001f35e", u8"\U0001f369", u8"\U0001f366", u8"\U0001f382",
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u8"\U0001f370", u8"\U0001f36a", u8"\U0001f36b", u8"\U0001f36d", u8"\U0001f36f", u8"\U0001f34e", u8"\U0001f34f",
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u8"\U0001f34a", u8"\U0001f34b", u8"\U0001f352", u8"\U0001f347", u8"\U0001f349", u8"\U0001f353", u8"\U0001f351",
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u8"\U0001f34c", u8"\U0001f350", u8"\U0001f34d", u8"\U0001f346", u8"\U0001f345", u8"\U0001f33d", u8"\U0001f3e1",
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u8"\U0001f3e5", u8"\U0001f3e6", u8"\u26ea", u8"\U0001f3f0", u8"\u26fa", u8"\U0001f3ed", u8"\U0001f5fb",
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u8"\U0001f5fd", u8"\U0001f3a0", u8"\U0001f3a1", u8"\u26f2", u8"\U0001f3a2", u8"\U0001f6a2", u8"\U0001f6a4",
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u8"\u2693", u8"\U0001f680", u8"\u2708", u8"\U0001f681", u8"\U0001f682", u8"\U0001f68b", u8"\U0001f68e",
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u8"\U0001f68c", u8"\U0001f699", u8"\U0001f697", u8"\U0001f695", u8"\U0001f69b", u8"\U0001f6a8", u8"\U0001f694",
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u8"\U0001f692", u8"\U0001f691", u8"\U0001f6b2", u8"\U0001f6a0", u8"\U0001f69c", u8"\U0001f6a6", u8"\u26a0",
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u8"\U0001f6a7", u8"\u26fd", u8"\U0001f3b0", u8"\U0001f5ff", u8"\U0001f3aa", u8"\U0001f3ad",
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u8"\U0001f1ef\U0001f1f5", u8"\U0001f1f0\U0001f1f7", u8"\U0001f1e9\U0001f1ea", u8"\U0001f1e8\U0001f1f3",
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u8"\U0001f1fa\U0001f1f8", u8"\U0001f1eb\U0001f1f7", u8"\U0001f1ea\U0001f1f8", u8"\U0001f1ee\U0001f1f9",
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u8"\U0001f1f7\U0001f1fa", u8"\U0001f1ec\U0001f1e7", u8"\u0031\u20e3", u8"\u0032\u20e3", u8"\u0033\u20e3",
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u8"\u0034\u20e3", u8"\u0035\u20e3", u8"\u0036\u20e3", u8"\u0037\u20e3", u8"\u0038\u20e3", u8"\u0039\u20e3",
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u8"\u0030\u20e3", u8"\U0001f51f", u8"\u2757", u8"\u2753", u8"\u2665", u8"\u2666", u8"\U0001f4af", u8"\U0001f517",
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u8"\U0001f531", u8"\U0001f534", u8"\U0001f535", u8"\U0001f536",
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// comment for clang-format
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u8"\U0001f537"};
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return emojis[static_cast<size_t>((num & 0x7FFFFFFFFFFFFFFF) % emojis.size())].str();
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}
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static bool tolower_begins_with(Slice str, Slice prefix) {
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if (prefix.size() > str.size()) {
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return false;
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}
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for (size_t i = 0; i < prefix.size(); i++) {
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if (to_lower(str[i]) != prefix[i]) {
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return false;
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}
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}
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return true;
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}
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Result<string> check_url(Slice url) {
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bool is_tg = false;
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bool is_ton = false;
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if (tolower_begins_with(url, "tg:")) {
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url.remove_prefix(3);
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is_tg = true;
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} else if (tolower_begins_with(url, "ton:")) {
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url.remove_prefix(4);
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is_ton = true;
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}
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if ((is_tg || is_ton) && begins_with(url, "//")) {
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url.remove_prefix(2);
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}
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TRY_RESULT(http_url, parse_url(url));
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if (is_tg || is_ton) {
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if (tolower_begins_with(url, "http://") || http_url.protocol_ == HttpUrl::Protocol::Https ||
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!http_url.userinfo_.empty() || http_url.specified_port_ != 0 || http_url.is_ipv6_) {
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return Status::Error(is_tg ? Slice("Wrong tg URL") : Slice("Wrong ton URL"));
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}
|
|
|
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Slice query(http_url.query_);
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CHECK(query[0] == '/');
|
|
if (query[1] == '?') {
|
|
query.remove_prefix(1);
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|
}
|
|
return PSTRING() << (is_tg ? "tg" : "ton") << "://" << http_url.host_ << query;
|
|
}
|
|
|
|
if (http_url.host_.find('.') == string::npos && !http_url.is_ipv6_) {
|
|
return Status::Error("Wrong HTTP URL");
|
|
}
|
|
return http_url.get_url();
|
|
}
|
|
|
|
string remove_emoji_modifiers(string emoji) {
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|
static const Slice modifiers[] = {u8"\uFE0E" /* variation selector-15 */,
|
|
u8"\uFE0F" /* variation selector-16 */,
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|
u8"\u200D\u2640" /* zero width joiner + female sign */,
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|
u8"\u200D\u2642" /* zero width joiner + male sign */,
|
|
u8"\U0001F3FB" /* emoji modifier fitzpatrick type-1-2 */,
|
|
u8"\U0001F3FC" /* emoji modifier fitzpatrick type-3 */,
|
|
u8"\U0001F3FD" /* emoji modifier fitzpatrick type-4 */,
|
|
u8"\U0001F3FE" /* emoji modifier fitzpatrick type-5 */,
|
|
u8"\U0001F3FF" /* emoji modifier fitzpatrick type-6 */};
|
|
bool found = true;
|
|
while (found) {
|
|
found = false;
|
|
for (auto &modifier : modifiers) {
|
|
if (ends_with(emoji, modifier) && emoji.size() > modifier.size()) {
|
|
emoji.resize(emoji.size() - modifier.size());
|
|
found = true;
|
|
}
|
|
}
|
|
}
|
|
return emoji;
|
|
}
|
|
|
|
} // namespace td
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