1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include "private-lib-core.h"
26
27 /*
28 * Produce Apache-compatible log string for wsi, like this:
29 *
30 * 2.31.234.19 - - [27/Mar/2016:03:22:44 +0800]
31 * "GET /aep-screen.png HTTP/1.1"
32 * 200 152987 "https://libwebsockets.org/index.html"
33 * "Mozilla/5.0 (Macint... Chrome/49.0.2623.87 Safari/537.36"
34 *
35 */
36
37 extern const char * const method_names[];
38
39 static const char * const hver[] = {
40 "HTTP/1.0", "HTTP/1.1", "HTTP/2"
41 };
42
43 void
lws_prepare_access_log_info(struct lws * wsi,char * uri_ptr,int uri_len,int meth)44 lws_prepare_access_log_info(struct lws *wsi, char *uri_ptr, int uri_len, int meth)
45 {
46 char da[64], uri[256], ta[64];
47 time_t t = time(NULL);
48 struct lws *nwsi;
49 const char *me;
50 int l = 256, m;
51 struct tm *ptm = NULL;
52 #if defined(LWS_HAVE_LOCALTIME_R)
53 struct tm tm;
54 #endif
55
56 if (!wsi->a.vhost)
57 return;
58
59 /* only worry about preparing it if we store it */
60 if (wsi->a.vhost->log_fd == (int)LWS_INVALID_FILE)
61 return;
62
63 if (wsi->access_log_pending)
64 lws_access_log(wsi);
65
66 wsi->http.access_log.header_log = lws_malloc((unsigned int)l, "access log");
67 if (!wsi->http.access_log.header_log)
68 return;
69
70 #if defined(LWS_HAVE_LOCALTIME_R)
71 ptm = localtime_r(&t, &tm);
72 #else
73 ptm = localtime(&t);
74 #endif
75 if (ptm)
76 strftime(da, sizeof(da), "%d/%b/%Y:%H:%M:%S %z", ptm);
77 else
78 strcpy(da, "01/Jan/1970:00:00:00 +0000");
79
80 #if defined(LWS_ROLE_H2)
81 if (wsi->mux_substream)
82 me = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_COLON_METHOD);
83 else
84 #endif
85 me = method_names[meth];
86
87 if (!me)
88 me = "(null)";
89
90 m = uri_len;
91 if (m > (int)sizeof(uri) - 1)
92 m = sizeof(uri) - 1;
93
94 strncpy(uri, uri_ptr, (unsigned int)m);
95 uri[m] = '\0';
96
97 nwsi = lws_get_network_wsi(wsi);
98
99 if (wsi->sa46_peer.sa4.sin_family)
100 lws_sa46_write_numeric_address(&nwsi->sa46_peer, ta, sizeof(ta));
101 else
102 strncpy(ta, "unknown", sizeof(ta));
103
104 lws_snprintf(wsi->http.access_log.header_log, (size_t)l,
105 "%s - - [%s] \"%s %s %s\"",
106 ta, da, me, uri, hver[wsi->http.request_version]);
107
108 //lwsl_notice("%s\n", wsi->http.access_log.header_log);
109
110 l = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_USER_AGENT);
111 if (l) {
112 wsi->http.access_log.user_agent =
113 lws_malloc((unsigned int)l + 5, "access log");
114 if (!wsi->http.access_log.user_agent) {
115 lwsl_err("OOM getting user agent\n");
116 lws_free_set_NULL(wsi->http.access_log.header_log);
117 return;
118 }
119 wsi->http.access_log.user_agent[0] = '\0';
120
121 if (lws_hdr_copy(wsi, wsi->http.access_log.user_agent, l + 4,
122 WSI_TOKEN_HTTP_USER_AGENT) >= 0)
123 for (m = 0; m < l; m++)
124 if (wsi->http.access_log.user_agent[m] == '\"')
125 wsi->http.access_log.user_agent[m] = '\'';
126 }
127 l = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_REFERER);
128 if (l) {
129 wsi->http.access_log.referrer = lws_malloc((unsigned int)l + 5, "referrer");
130 if (!wsi->http.access_log.referrer) {
131 lwsl_err("OOM getting referrer\n");
132 lws_free_set_NULL(wsi->http.access_log.user_agent);
133 lws_free_set_NULL(wsi->http.access_log.header_log);
134 return;
135 }
136 wsi->http.access_log.referrer[0] = '\0';
137 if (lws_hdr_copy(wsi, wsi->http.access_log.referrer,
138 l + 4, WSI_TOKEN_HTTP_REFERER) >= 0)
139
140 for (m = 0; m < l; m++)
141 if (wsi->http.access_log.referrer[m] == '\"')
142 wsi->http.access_log.referrer[m] = '\'';
143 }
144 wsi->access_log_pending = 1;
145 }
146
147
148 int
lws_access_log(struct lws * wsi)149 lws_access_log(struct lws *wsi)
150 {
151 char *p = wsi->http.access_log.user_agent, ass[512],
152 *p1 = wsi->http.access_log.referrer;
153 int l;
154
155 if (!wsi->a.vhost)
156 return 0;
157
158 if (wsi->a.vhost->log_fd == (int)LWS_INVALID_FILE)
159 return 0;
160
161 if (!wsi->access_log_pending)
162 return 0;
163
164 if (!wsi->http.access_log.header_log)
165 return 0;
166
167 if (!p)
168 p = "";
169
170 if (!p1)
171 p1 = "";
172
173 /*
174 * We do this in two parts to restrict an oversize referrer such that
175 * we will always have space left to append an empty useragent, while
176 * maintaining the structure of the log text
177 */
178 l = lws_snprintf(ass, sizeof(ass) - 7, "%s %d %lu \"%s",
179 wsi->http.access_log.header_log,
180 wsi->http.access_log.response,
181 wsi->http.access_log.sent, p1);
182 if (strlen(p) > sizeof(ass) - 6 - (unsigned int)l) {
183 p[sizeof(ass) - 6 - (unsigned int)l] = '\0';
184 l--;
185 }
186 l += lws_snprintf(ass + (unsigned int)l, sizeof(ass) - 1 - (unsigned int)l, "\" \"%s\"\n", p);
187
188 ass[sizeof(ass) - 1] = '\0';
189
190 if ((int)write(wsi->a.vhost->log_fd, ass, (size_t)l) != l)
191 lwsl_err("Failed to write log\n");
192
193 if (wsi->http.access_log.header_log) {
194 lws_free(wsi->http.access_log.header_log);
195 wsi->http.access_log.header_log = NULL;
196 }
197 if (wsi->http.access_log.user_agent) {
198 lws_free(wsi->http.access_log.user_agent);
199 wsi->http.access_log.user_agent = NULL;
200 }
201 if (wsi->http.access_log.referrer) {
202 lws_free(wsi->http.access_log.referrer);
203 wsi->http.access_log.referrer = NULL;
204 }
205 wsi->access_log_pending = 0;
206
207 return 0;
208 }
209
210