/src/libgit2/deps/llhttp/http.c
Line | Count | Source (jump to first uncovered line) |
1 | | #include <stdio.h> |
2 | | #ifndef LLHTTP__TEST |
3 | | # include "llhttp.h" |
4 | | #else |
5 | | # define llhttp_t llparse_t |
6 | | #endif /* */ |
7 | | |
8 | | int llhttp_message_needs_eof(const llhttp_t* parser); |
9 | | int llhttp_should_keep_alive(const llhttp_t* parser); |
10 | | |
11 | | int llhttp__before_headers_complete(llhttp_t* parser, const char* p, |
12 | 0 | const char* endp) { |
13 | | /* Set this here so that on_headers_complete() callbacks can see it */ |
14 | 0 | if ((parser->flags & F_UPGRADE) && |
15 | 0 | (parser->flags & F_CONNECTION_UPGRADE)) { |
16 | | /* For responses, "Upgrade: foo" and "Connection: upgrade" are |
17 | | * mandatory only when it is a 101 Switching Protocols response, |
18 | | * otherwise it is purely informational, to announce support. |
19 | | */ |
20 | 0 | parser->upgrade = |
21 | 0 | (parser->type == HTTP_REQUEST || parser->status_code == 101); |
22 | 0 | } else { |
23 | 0 | parser->upgrade = (parser->method == HTTP_CONNECT); |
24 | 0 | } |
25 | 0 | return 0; |
26 | 0 | } |
27 | | |
28 | | |
29 | | /* Return values: |
30 | | * 0 - No body, `restart`, message_complete |
31 | | * 1 - CONNECT request, `restart`, message_complete, and pause |
32 | | * 2 - chunk_size_start |
33 | | * 3 - body_identity |
34 | | * 4 - body_identity_eof |
35 | | * 5 - invalid transfer-encoding for request |
36 | | */ |
37 | | int llhttp__after_headers_complete(llhttp_t* parser, const char* p, |
38 | 0 | const char* endp) { |
39 | 0 | int hasBody; |
40 | |
|
41 | 0 | hasBody = parser->flags & F_CHUNKED || parser->content_length > 0; |
42 | 0 | if ( |
43 | 0 | (parser->upgrade && (parser->method == HTTP_CONNECT || |
44 | 0 | (parser->flags & F_SKIPBODY) || !hasBody)) || |
45 | | /* See RFC 2616 section 4.4 - 1xx e.g. Continue */ |
46 | 0 | (parser->type == HTTP_RESPONSE && parser->status_code == 101) |
47 | 0 | ) { |
48 | | /* Exit, the rest of the message is in a different protocol. */ |
49 | 0 | return 1; |
50 | 0 | } |
51 | | |
52 | 0 | if (parser->type == HTTP_RESPONSE && parser->status_code == 100) { |
53 | | /* No body, restart as the message is complete */ |
54 | 0 | return 0; |
55 | 0 | } |
56 | | |
57 | | /* See RFC 2616 section 4.4 */ |
58 | 0 | if ( |
59 | 0 | parser->flags & F_SKIPBODY || /* response to a HEAD request */ |
60 | 0 | ( |
61 | 0 | parser->type == HTTP_RESPONSE && ( |
62 | 0 | parser->status_code == 102 || /* Processing */ |
63 | 0 | parser->status_code == 103 || /* Early Hints */ |
64 | 0 | parser->status_code == 204 || /* No Content */ |
65 | 0 | parser->status_code == 304 /* Not Modified */ |
66 | 0 | ) |
67 | 0 | ) |
68 | 0 | ) { |
69 | 0 | return 0; |
70 | 0 | } else if (parser->flags & F_CHUNKED) { |
71 | | /* chunked encoding - ignore Content-Length header, prepare for a chunk */ |
72 | 0 | return 2; |
73 | 0 | } else if (parser->flags & F_TRANSFER_ENCODING) { |
74 | 0 | if (parser->type == HTTP_REQUEST && |
75 | 0 | (parser->lenient_flags & LENIENT_CHUNKED_LENGTH) == 0 && |
76 | 0 | (parser->lenient_flags & LENIENT_TRANSFER_ENCODING) == 0) { |
77 | | /* RFC 7230 3.3.3 */ |
78 | | |
79 | | /* If a Transfer-Encoding header field |
80 | | * is present in a request and the chunked transfer coding is not |
81 | | * the final encoding, the message body length cannot be determined |
82 | | * reliably; the server MUST respond with the 400 (Bad Request) |
83 | | * status code and then close the connection. |
84 | | */ |
85 | 0 | return 5; |
86 | 0 | } else { |
87 | | /* RFC 7230 3.3.3 */ |
88 | | |
89 | | /* If a Transfer-Encoding header field is present in a response and |
90 | | * the chunked transfer coding is not the final encoding, the |
91 | | * message body length is determined by reading the connection until |
92 | | * it is closed by the server. |
93 | | */ |
94 | 0 | return 4; |
95 | 0 | } |
96 | 0 | } else { |
97 | 0 | if (!(parser->flags & F_CONTENT_LENGTH)) { |
98 | 0 | if (!llhttp_message_needs_eof(parser)) { |
99 | | /* Assume content-length 0 - read the next */ |
100 | 0 | return 0; |
101 | 0 | } else { |
102 | | /* Read body until EOF */ |
103 | 0 | return 4; |
104 | 0 | } |
105 | 0 | } else if (parser->content_length == 0) { |
106 | | /* Content-Length header given but zero: Content-Length: 0\r\n */ |
107 | 0 | return 0; |
108 | 0 | } else { |
109 | | /* Content-Length header given and non-zero */ |
110 | 0 | return 3; |
111 | 0 | } |
112 | 0 | } |
113 | 0 | } |
114 | | |
115 | | |
116 | | int llhttp__after_message_complete(llhttp_t* parser, const char* p, |
117 | 0 | const char* endp) { |
118 | 0 | int should_keep_alive; |
119 | |
|
120 | 0 | should_keep_alive = llhttp_should_keep_alive(parser); |
121 | 0 | parser->finish = HTTP_FINISH_SAFE; |
122 | 0 | parser->flags = 0; |
123 | | |
124 | | /* NOTE: this is ignored in loose parsing mode */ |
125 | 0 | return should_keep_alive; |
126 | 0 | } |
127 | | |
128 | | |
129 | 0 | int llhttp_message_needs_eof(const llhttp_t* parser) { |
130 | 0 | if (parser->type == HTTP_REQUEST) { |
131 | 0 | return 0; |
132 | 0 | } |
133 | | |
134 | | /* See RFC 2616 section 4.4 */ |
135 | 0 | if (parser->status_code / 100 == 1 || /* 1xx e.g. Continue */ |
136 | 0 | parser->status_code == 204 || /* No Content */ |
137 | 0 | parser->status_code == 304 || /* Not Modified */ |
138 | 0 | (parser->flags & F_SKIPBODY)) { /* response to a HEAD request */ |
139 | 0 | return 0; |
140 | 0 | } |
141 | | |
142 | | /* RFC 7230 3.3.3, see `llhttp__after_headers_complete` */ |
143 | 0 | if ((parser->flags & F_TRANSFER_ENCODING) && |
144 | 0 | (parser->flags & F_CHUNKED) == 0) { |
145 | 0 | return 1; |
146 | 0 | } |
147 | | |
148 | 0 | if (parser->flags & (F_CHUNKED | F_CONTENT_LENGTH)) { |
149 | 0 | return 0; |
150 | 0 | } |
151 | | |
152 | 0 | return 1; |
153 | 0 | } |
154 | | |
155 | | |
156 | 0 | int llhttp_should_keep_alive(const llhttp_t* parser) { |
157 | 0 | if (parser->http_major > 0 && parser->http_minor > 0) { |
158 | | /* HTTP/1.1 */ |
159 | 0 | if (parser->flags & F_CONNECTION_CLOSE) { |
160 | 0 | return 0; |
161 | 0 | } |
162 | 0 | } else { |
163 | | /* HTTP/1.0 or earlier */ |
164 | 0 | if (!(parser->flags & F_CONNECTION_KEEP_ALIVE)) { |
165 | 0 | return 0; |
166 | 0 | } |
167 | 0 | } |
168 | | |
169 | 0 | return !llhttp_message_needs_eof(parser); |
170 | 0 | } |