summaryrefslogtreecommitdiff
path: root/networking/httpd_indexcgi.c
diff options
context:
space:
mode:
authorDenis Vlasenko2007-08-22 10:38:44 +0000
committerDenis Vlasenko2007-08-22 10:38:44 +0000
commit764299819016e5fb400be2fccf12d8de248e4cef (patch)
treea031b6c86205944508794b9ef2dc0dca1e629f3d /networking/httpd_indexcgi.c
parent72b6a65b2fab7325767ce72fc71b9cf45514764a (diff)
downloadbusybox-764299819016e5fb400be2fccf12d8de248e4cef.zip
busybox-764299819016e5fb400be2fccf12d8de248e4cef.tar.gz
httpd: replace shell-based dir indexer cgi example with C-based one.
Diffstat (limited to 'networking/httpd_indexcgi.c')
-rw-r--r--networking/httpd_indexcgi.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/networking/httpd_indexcgi.c b/networking/httpd_indexcgi.c
new file mode 100644
index 0000000..b7e466c
--- /dev/null
+++ b/networking/httpd_indexcgi.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright (c) 2007 Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+
+/*
+ * This program is a CGI application. It creates directory index page.
+ * Put it into cgi-bin/index.cgi and chmod 0755.
+ */
+
+/* Build a-la
+i486-linux-uclibc-gcc \
+-static -static-libgcc \
+-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \
+-Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Werror \
+-Wold-style-definition -Wdeclaration-after-statement -Wno-pointer-sign \
+-Wmissing-prototypes -Wmissing-declarations \
+-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer \
+-ffunction-sections -fdata-sections -fno-guess-branch-probability \
+-funsigned-char \
+-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 \
+-march=i386 -mpreferred-stack-boundary=2 \
+-Wl,-Map -Wl,link.map -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
+httpd_indexcgi.c -o index.cgi
+
+Size (approximate):
+ text data bss dec hex filename
+22642 160 3052 25854 64fe index.cgi
+*/
+
+/* TODO: get rid of printf's: printf code is more than 50%
+ * of the entire executable when built against static uclibc */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <time.h>
+
+/* Appearance of the table is controlled by style sheet *ONLY*,
+ * formatting code uses <TAG class=CLASS> to apply style
+ * to elements. Edit stylesheet to your liking and recompile. */
+
+static const char str_header[] =
+"" /* Additional headers (currently none) */
+"\r\n" /* Mandatory empty line after headers */
+"<html><head><title>Index of %s</title>" "\n"
+"<style>" "\n"
+"table {" "\n"
+" width: 100%%;" "\n"
+" background-color: #fff5ee;" "\n"
+" border-width: 1px;" /* 1px 1px 1px 1px; */ "\n"
+" border-spacing: 2px;" "\n"
+" border-style: solid;" /* solid solid solid solid; */ "\n"
+" border-color: black;" /* black black black black; */ "\n"
+" border-collapse: collapse;" "\n"
+"}" "\n"
+"th {" "\n"
+" border-width: 1px;" /* 1px 1px 1px 1px; */ "\n"
+" padding: 1px;" /* 1px 1px 1px 1px; */ "\n"
+" border-style: solid;" /* solid solid solid solid; */ "\n"
+" border-color: black;" /* black black black black; */ "\n"
+"}" "\n"
+"td {" "\n"
+ /* top right bottom left */
+" border-width: 0px 1px 0px 1px;" "\n"
+" padding: 1px;" /* 1px 1px 1px 1px; */ "\n"
+" border-style: solid;" /* solid solid solid solid; */ "\n"
+" border-color: black;" /* black black black black; */ "\n"
+"}" "\n"
+"tr.hdr { background-color:#eee5de; }" "\n"
+"tr.o { background-color:#ffffff; }" "\n"
+/* tr.e { ... } - for even rows (currently none) */
+"tr.foot { background-color:#eee5de; }" "\n"
+"th.cnt { text-align:left; }" "\n"
+"th.sz { text-align:right; }" "\n"
+"th.dt { text-align:right; }" "\n"
+"td.sz { text-align:right; }" "\n"
+"td.dt { text-align:right; }" "\n"
+"col.nm { width: 98%%; }" "\n"
+"col.sz { width: 1%%; }" "\n"
+"col.dt { width: 1%%; }" "\n"
+"</style>" "\n"
+"</head>" "\n"
+"<body>" "\n"
+"<h1>Index of %s</h1>" "\n"
+"" "\n"
+"<table>" "\n"
+"<col class=nm><col class=sz><col class=dt>" "\n"
+"<tr class=hdr><th class=cnt>Name<th class=sz>Size<th class=dt>Last modified" "\n"
+;
+
+static const char str_footer[] =
+"<tr class=foot><th class=cnt>Files: %u, directories: %u<th class=sz>%llu<th class=dt>&nbsp;" "\n"
+/* "</table></body></html>" - why bother? */
+;
+
+static int bad_url_char(unsigned c)
+{
+ return (c - '0') > 9 /* not a digit */
+ && ((c|0x20) - 'a') > 26 /* not A-Z or a-z */
+ && !strchr("._-+@", c);
+}
+
+static char *url_encode(const char *name)
+{
+ int i;
+ int size = 0;
+ int len = strlen(name);
+ char *p, *result;
+
+ i = 0;
+ while (name[i]) {
+ if (bad_url_char((unsigned)name[i]))
+ size++;
+ i++;
+ }
+
+ /* No %xx needed! */
+ if (!size)
+ return (char*)name;
+
+ /* Each %xx requires 2 additional chars */
+ size = size * 2 + len + 1;
+ p = result = malloc(size);
+
+ i = 0;
+ while (name[i]) {
+ *p = name[i];
+ if (bad_url_char((unsigned)name[i])) {
+ *p++ = '%';
+ *p++ = "0123456789ABCDEF"[(uint8_t)(name[i]) >> 4];
+ *p = "0123456789ABCDEF"[(uint8_t)(name[i]) & 0xf];
+ }
+ p++;
+ i++;
+ }
+ *p = 0;
+ return result;
+}
+
+static char *html_encode(const char *name)
+{
+ int i;
+ int size = 0;
+ int len = strlen(name);
+ char *p, *result;
+
+ i = 0;
+ while (name[i]) {
+ if (name[i] == '<'
+ || name[i] == '>'
+ || name[i] == '&'
+ ) {
+ size++;
+ }
+ i++;
+ }
+
+ /* No &lt; etc needed! */
+ if (!size)
+ return (char*)name;
+
+ /* &amp; requires 4 additional chars */
+ size = size * 4 + len + 1;
+ p = result = malloc(size);
+
+ i = 0;
+ while (name[i]) {
+ char c;
+ *p = c = name[i++];
+ if (c == '<')
+ strcpy(p, "&lt;");
+ else if (c == '>')
+ strcpy(p, "&gt;");
+ else if (c == '&')
+ strcpy(++p, "amp;");
+ else {
+ p++;
+ continue;
+ }
+ p += 4;
+ }
+ *p = 0;
+ return result;
+}
+
+typedef struct dir_list_t {
+ char *dl_name;
+ mode_t dl_mode;
+ off_t dl_size;
+ time_t dl_mtime;
+} dir_list_t;
+
+static int compare_dl(dir_list_t *a, dir_list_t *b)
+{
+ if (strcmp(a->dl_name, "..") == 0) {
+ /* ".." is 'less than' any other dir entry */
+ return -1;
+ }
+ if (strcmp(b->dl_name, "..") == 0) {
+ return 1;
+ }
+ if (S_ISDIR(a->dl_mode) != S_ISDIR(b->dl_mode)) {
+ /* 1 if b is a dir (and thus a is 'after' b, a > b),
+ * else -1 (a < b)*/
+ return (S_ISDIR(b->dl_mode) != 0) ? 1 : -1;
+ }
+ return strcmp(a->dl_name, b->dl_name);
+}
+
+int main(void)
+{
+ dir_list_t *dir_list;
+ dir_list_t *cdir;
+ unsigned dir_list_count;
+ unsigned count_dirs;
+ unsigned count_files;
+ unsigned long long size_total;
+ int odd;
+ DIR *dirp;
+ char *QUERY_STRING;
+
+ QUERY_STRING = getenv("QUERY_STRING");
+ if (!QUERY_STRING
+ || QUERY_STRING[0] != '/'
+ || strstr(QUERY_STRING, "/../")
+ || strcmp(strrchr(QUERY_STRING, '/'), "/..") == 0
+ ) {
+ return 1;
+ }
+
+ if (chdir("..")
+ || (QUERY_STRING[1] && chdir(QUERY_STRING + 1))
+ ) {
+ return 1;
+ }
+
+ dirp = opendir(".");
+ if (!dirp)
+ return 1;
+
+ dir_list = NULL;
+ dir_list_count = 0;
+ while (1) {
+ struct dirent *dp;
+ struct stat sb;
+
+ dp = readdir(dirp);
+ if (!dp)
+ break;
+ if (dp->d_name[0] == '.' && !dp->d_name[1])
+ continue;
+ if (stat(dp->d_name, &sb) != 0)
+ continue;
+ dir_list = realloc(dir_list, (dir_list_count + 1) * sizeof(dir_list[0]));
+ dir_list[dir_list_count].dl_name = strdup(dp->d_name);
+ dir_list[dir_list_count].dl_mode = sb.st_mode;
+ dir_list[dir_list_count].dl_size = sb.st_size;
+ dir_list[dir_list_count].dl_mtime = sb.st_mtime;
+ dir_list_count++;
+ }
+
+ qsort(dir_list, dir_list_count, sizeof(dir_list[0]), (void*)compare_dl);
+
+ /* Guard against directories wit &, > etc */
+ QUERY_STRING = html_encode(QUERY_STRING);
+ printf(str_header, QUERY_STRING, QUERY_STRING);
+
+ odd = 0;
+ count_dirs = 0;
+ count_files = 0;
+ size_total = 0;
+
+ cdir = dir_list;
+ while (dir_list_count--) {
+ char size_str[sizeof(long long) * 3];
+ const char *slash_if_dir;
+ struct tm *tm;
+ char *href;
+ char *filename;
+ char datetime_str[sizeof("2000-02-02&nbsp;02:02:02")];
+
+ slash_if_dir = "/";
+ if (S_ISDIR(cdir->dl_mode)) {
+ count_dirs++;
+ size_str[0] = '\0';
+ } else if (S_ISREG(cdir->dl_mode)) {
+ count_files++;
+ size_total += cdir->dl_size;
+ slash_if_dir++; /* points to "" now */
+ sprintf(size_str, "%llu", (unsigned long long)(cdir->dl_size));
+ } else
+ goto next;
+ href = url_encode(cdir->dl_name); /* %20 etc */
+ filename = html_encode(cdir->dl_name); /* &lt; etc */
+ tm = gmtime(&cdir->dl_mtime);
+ sprintf(datetime_str, "%04u-%02u-%02u&nbsp;%02u:%02u:%02u",
+ (unsigned)(1900 + tm->tm_year),
+ (unsigned)(tm->tm_mon + 1),
+ (unsigned)(tm->tm_mday),
+ (unsigned)(tm->tm_hour),
+ (unsigned)(tm->tm_min),
+ (unsigned)(tm->tm_sec)
+ );
+ printf("<tr class=%c><td class=nm><a href='%s%s'>%s%s</a><td class=sz>%s<td class=dt>%s\n",
+ odd ? 'o' : 'e',
+ href, slash_if_dir,
+ filename, slash_if_dir,
+ size_str,
+ datetime_str
+ );
+ if (cdir->dl_name != href)
+ free(href);
+ if (cdir->dl_name != filename)
+ free(filename);
+ odd = 1 - odd;
+ next:
+ cdir++;
+ }
+
+ /* count_dirs - 1: we don't want to count ".." */
+ printf(str_footer, count_files, count_dirs - 1, size_total);
+ return 0;
+}
generated by cgit v1.1 at 2024-12-27 09:11:45 +0000