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1 | // |
2 | // request_parser.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~ | |
4 | // | |
b32b8144 | 5 | // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef HTTP_SERVER4_REQUEST_PARSER_HPP | |
12 | #define HTTP_SERVER4_REQUEST_PARSER_HPP | |
13 | ||
14 | #include <string> | |
15 | #include <boost/logic/tribool.hpp> | |
16 | #include <boost/tuple/tuple.hpp> | |
17 | #include <boost/asio/coroutine.hpp> | |
18 | ||
19 | namespace http { | |
20 | namespace server4 { | |
21 | ||
22 | struct request; | |
23 | ||
24 | /// Parser for incoming requests. | |
25 | class request_parser : boost::asio::coroutine | |
26 | { | |
27 | public: | |
28 | /// Parse some data. The tribool return value is true when a complete request | |
29 | /// has been parsed, false if the data is invalid, indeterminate when more | |
30 | /// data is required. The InputIterator return value indicates how much of the | |
31 | /// input has been consumed. | |
32 | template <typename InputIterator> | |
33 | boost::tuple<boost::tribool, InputIterator> parse(request& req, | |
34 | InputIterator begin, InputIterator end) | |
35 | { | |
36 | while (begin != end) | |
37 | { | |
38 | boost::tribool result = consume(req, *begin++); | |
39 | if (result || !result) | |
40 | return boost::make_tuple(result, begin); | |
41 | } | |
42 | boost::tribool result = boost::indeterminate; | |
43 | return boost::make_tuple(result, begin); | |
44 | } | |
45 | ||
46 | private: | |
47 | /// The name of the content length header. | |
48 | static std::string content_length_name_; | |
49 | ||
50 | /// Content length as decoded from headers. Defaults to 0. | |
51 | std::size_t content_length_; | |
52 | ||
53 | /// Handle the next character of input. | |
54 | boost::tribool consume(request& req, char input); | |
55 | ||
56 | /// Check if a byte is an HTTP character. | |
57 | static bool is_char(int c); | |
58 | ||
59 | /// Check if a byte is an HTTP control character. | |
60 | static bool is_ctl(int c); | |
61 | ||
62 | /// Check if a byte is defined as an HTTP tspecial character. | |
63 | static bool is_tspecial(int c); | |
64 | ||
65 | /// Check if a byte is a digit. | |
66 | static bool is_digit(int c); | |
67 | ||
68 | /// Check if two characters are equal, without regard to case. | |
69 | static bool tolower_compare(char a, char b); | |
70 | ||
71 | /// Check whether the two request header names match. | |
72 | bool headers_equal(const std::string& a, const std::string& b); | |
73 | }; | |
74 | ||
75 | } // namespace server4 | |
76 | } // namespace http | |
77 | ||
78 | #endif // HTTP_SERVER4_REQUEST_PARSER_HPP |