Contents of /trunk/mkinitrd-magellan/busybox/networking/httpd_ssi.c
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
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File size: 4248 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 4248 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* |
2 | * Copyright (c) 2009 Denys Vlasenko <vda.linux@googlemail.com> |
3 | * |
4 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
5 | */ |
6 | |
7 | /* |
8 | * This program is a CGI application. It processes server-side includes: |
9 | * <!--#include file="file.html" --> |
10 | * |
11 | * Usage: put these lines in httpd.conf: |
12 | * |
13 | * *.html:/bin/httpd_ssi |
14 | * *.htm:/bin/httpd_ssi |
15 | */ |
16 | |
17 | /* Build a-la |
18 | i486-linux-uclibc-gcc \ |
19 | -static -static-libgcc \ |
20 | -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \ |
21 | -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Werror \ |
22 | -Wold-style-definition -Wdeclaration-after-statement -Wno-pointer-sign \ |
23 | -Wmissing-prototypes -Wmissing-declarations \ |
24 | -Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer \ |
25 | -ffunction-sections -fdata-sections -fno-guess-branch-probability \ |
26 | -funsigned-char \ |
27 | -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 \ |
28 | -march=i386 -mpreferred-stack-boundary=2 \ |
29 | -Wl,-Map -Wl,link.map -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ |
30 | httpd_ssi.c -o httpd_ssi |
31 | */ |
32 | |
33 | /* Size (i386, static uclibc, approximate): |
34 | * text data bss dec hex filename |
35 | * 9487 160 68552 78199 13177 httpd_ssi |
36 | * |
37 | * Note: it wouldn't be too hard to get rid of stdio and strdup, |
38 | * (especially that fgets() mangles NULs...) |
39 | */ |
40 | |
41 | #include <sys/types.h> |
42 | #include <sys/stat.h> |
43 | #include <errno.h> |
44 | #include <fcntl.h> |
45 | #include <stdint.h> |
46 | #include <stdlib.h> |
47 | #include <string.h> |
48 | #include <unistd.h> |
49 | #include <stdio.h> |
50 | #include <dirent.h> |
51 | #include <time.h> |
52 | |
53 | static char* skip_whitespace(char *s) |
54 | { |
55 | while (*s == ' ' || *s == '\t') ++s; |
56 | |
57 | return s; |
58 | } |
59 | |
60 | static char line[64 * 1024]; |
61 | |
62 | static void process_includes(const char *filename) |
63 | { |
64 | int curdir_fd; |
65 | char *end; |
66 | FILE *fp = fopen(filename, "r"); |
67 | if (!fp) |
68 | exit(1); |
69 | |
70 | /* Ensure that nested includes are relative: |
71 | * if we include a/1.htm and it includes b/2.htm, |
72 | * we need to include a/b/2.htm, not b/2.htm |
73 | */ |
74 | curdir_fd = -1; |
75 | end = strrchr(filename, '/'); |
76 | if (end) { |
77 | curdir_fd = open(".", O_RDONLY); |
78 | /* *end = '\0' would mishandle "/file.htm" */ |
79 | end[1] = '\0'; |
80 | chdir(filename); |
81 | } |
82 | |
83 | #define INCLUDE "<!--#include" |
84 | while (fgets(line, sizeof(line), fp)) { |
85 | unsigned preceding_len; |
86 | char *include_directive; |
87 | |
88 | include_directive = strstr(line, INCLUDE); |
89 | if (!include_directive) { |
90 | fputs(line, stdout); |
91 | continue; |
92 | } |
93 | preceding_len = include_directive - line; |
94 | if (memchr(line, '\"', preceding_len) |
95 | || memchr(line, '\'', preceding_len) |
96 | ) { |
97 | /* INCLUDE string may be inside "str" or 'str', |
98 | * ignore it */ |
99 | fputs(line, stdout); |
100 | continue; |
101 | } |
102 | /* Small bug: we accept #includefile="file" too */ |
103 | include_directive = skip_whitespace(include_directive + sizeof(INCLUDE)-1); |
104 | if (strncmp(include_directive, "file=\"", 6) != 0) { |
105 | /* "<!--#include virtual=..."? - not supported */ |
106 | fputs(line, stdout); |
107 | continue; |
108 | } |
109 | include_directive += 6; /* now it points to file name */ |
110 | end = strchr(include_directive, '\"'); |
111 | if (!end) { |
112 | fputs(line, stdout); |
113 | continue; |
114 | } |
115 | /* We checked that this is a valid include directive */ |
116 | |
117 | /* Print everything before directive */ |
118 | if (preceding_len) { |
119 | line[preceding_len] = '\0'; |
120 | fputs(line, stdout); |
121 | } |
122 | /* Save everything after directive */ |
123 | *end++ = '\0'; |
124 | end = strchr(end, '>'); |
125 | if (end) |
126 | end = strdup(end + 1); |
127 | |
128 | /* FIXME: |
129 | * (1) are relative paths with /../ etc ok? |
130 | * (2) what to do with absolute paths? |
131 | * are they relative to doc root or to real root? |
132 | */ |
133 | process_includes(include_directive); |
134 | |
135 | /* Print everything after directive */ |
136 | if (end) { |
137 | fputs(end, stdout); |
138 | free(end); |
139 | } |
140 | } |
141 | if (curdir_fd >= 0) |
142 | fchdir(curdir_fd); |
143 | fclose(fp); |
144 | } |
145 | |
146 | int main(int argc, char *argv[]) |
147 | { |
148 | if (!argv[1]) |
149 | return 1; |
150 | |
151 | /* Seen from busybox.net's Apache: |
152 | * HTTP/1.1 200 OK |
153 | * Date: Thu, 10 Sep 2009 18:23:28 GMT |
154 | * Server: Apache |
155 | * Accept-Ranges: bytes |
156 | * Connection: close |
157 | * Content-Type: text/html |
158 | */ |
159 | fputs( |
160 | /* "Date: Thu, 10 Sep 2009 18:23:28 GMT\r\n" */ |
161 | /* "Server: Apache\r\n" */ |
162 | /* "Accept-Ranges: bytes\r\n" - do we really accept bytes?! */ |
163 | "Connection: close\r\n" |
164 | "Content-Type: text/html\r\n" |
165 | "\r\n", |
166 | stdout |
167 | ); |
168 | process_includes(argv[1]); |
169 | return 0; |
170 | } |