*
*/
/* TODO: use TCP_CORK, parse_config() */
+//config:config HTTPD
+//config: bool "httpd"
+//config: default y
+//config: help
+//config: HTTP server.
+//config:
+//config:config FEATURE_HTTPD_RANGES
+//config: bool "Support 'Ranges:' header"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Makes httpd emit "Accept-Ranges: bytes" header and understand
+//config: "Range: bytes=NNN-[MMM]" header. Allows for resuming interrupted
+//config: downloads, seeking in multimedia players etc.
+//config:
+//config:config FEATURE_HTTPD_SETUID
+//config: bool "Enable -u <user> option"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows the server to run as a specific user
+//config: rather than defaulting to the user that starts the server.
+//config: Use of this option requires special privileges to change to a
+//config: different user.
+//config:
+//config:config FEATURE_HTTPD_BASIC_AUTH
+//config: bool "Enable Basic http Authentication"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Utilizes password settings from /etc/httpd.conf for basic
+//config: authentication on a per url basis.
+//config: Example for httpd.conf file:
+//config: /adm:toor:PaSsWd
+//config:
+//config:config FEATURE_HTTPD_AUTH_MD5
+//config: bool "Support MD5 crypted passwords for http Authentication"
+//config: default y
+//config: depends on FEATURE_HTTPD_BASIC_AUTH
+//config: help
+//config: Enables encrypted passwords, and wildcard user/passwords
+//config: in httpd.conf file.
+//config: User '*' means 'any system user name is ok',
+//config: password of '*' means 'use system password for this user'
+//config: Examples:
+//config: /adm:toor:$1$P/eKnWXS$aI1aPGxT.dJD5SzqAKWrF0
+//config: /adm:root:*
+//config: /wiki:*:*
+//config:
+//config:config FEATURE_HTTPD_CGI
+//config: bool "Support Common Gateway Interface (CGI)"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows scripts and executables to be invoked
+//config: when specific URLs are requested.
+//config:
+//config:config FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+//config: bool "Support running scripts through an interpreter"
+//config: default y
+//config: depends on FEATURE_HTTPD_CGI
+//config: help
+//config: This option enables support for running scripts through an
+//config: interpreter. Turn this on if you want PHP scripts to work
+//config: properly. You need to supply an additional line in your
+//config: httpd.conf file:
+//config: *.php:/path/to/your/php
+//config:
+//config:config FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+//config: bool "Set REMOTE_PORT environment variable for CGI"
+//config: default y
+//config: depends on FEATURE_HTTPD_CGI
+//config: help
+//config: Use of this option can assist scripts in generating
+//config: references that contain a unique port number.
+//config:
+//config:config FEATURE_HTTPD_ENCODE_URL_STR
+//config: bool "Enable -e option (useful for CGIs written as shell scripts)"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows html encoding of arbitrary strings for display
+//config: by the browser. Output goes to stdout.
+//config: For example, httpd -e "<Hello World>" produces
+//config: "<Hello World>".
+//config:
+//config:config FEATURE_HTTPD_ERROR_PAGES
+//config: bool "Support custom error pages"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows you to define custom error pages in
+//config: the configuration file instead of the default HTTP status
+//config: error pages. For instance, if you add the line:
+//config: E404:/path/e404.html
+//config: in the config file, the server will respond the specified
+//config: '/path/e404.html' file instead of the terse '404 NOT FOUND'
+//config: message.
+//config:
+//config:config FEATURE_HTTPD_PROXY
+//config: bool "Support reverse proxy"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows you to define URLs that will be forwarded
+//config: to another HTTP server. To setup add the following line to the
+//config: configuration file
+//config: P:/url/:http://hostname[:port]/new/path/
+//config: Then a request to /url/myfile will be forwarded to
+//config: http://hostname[:port]/new/path/myfile.
+//config:
+//config:config FEATURE_HTTPD_GZIP
+//config: bool "Support GZIP content encoding"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Makes httpd send files using GZIP content encoding if the
+//config: client supports it and a pre-compressed <file>.gz exists.
+
+//applet:IF_HTTPD(APPLET(httpd, BB_DIR_USR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_HTTPD) += httpd.o
//usage:#define httpd_trivial_usage
//usage: "[-ifv[v]]"
//usage: "\n -d STRING URL decode STRING"
#include "libbb.h"
+#include "common_bufsiz.h"
#if ENABLE_PAM
/* PAM may include <locale.h>. We may need to undefine bbox's stub define: */
# undef setlocale
Htaccess *script_i; /* config script interpreters */
#endif
char *iobuf; /* [IOBUF_SIZE] */
-#define hdr_buf bb_common_bufsiz1
+#define hdr_buf bb_common_bufsiz1
+#define sizeof_hdr_buf COMMON_BUFSIZE
char *hdr_ptr;
int hdr_cnt;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
# define content_gzip 0
#endif
#define INIT_G() do { \
+ setup_common_bufsiz(); \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
static void send_headers(int responseNum)
{
static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
+ /* Fixed size 29-byte string. Example: Sun, 06 Nov 1994 08:49:37 GMT */
+ char date_str[40]; /* using a bit larger buffer to paranoia reasons */
const char *responseString = "";
const char *infoString = NULL;
- const char *mime_type;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
const char *error_page = NULL;
#endif
unsigned i;
time_t timer = time(NULL);
- char tmp_str[80];
int len;
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
break;
}
}
- /* error message is HTML */
- mime_type = responseNum == HTTP_OK ?
- found_mime_type : "text/html";
if (verbose)
bb_error_msg("response:%u", responseNum);
- /* emit the current date */
- strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
+ /* We use sprintf, not snprintf (it's less code).
+ * iobuf[] is several kbytes long and all headers we generate
+ * always fit into those kbytes.
+ */
+
+ strftime(date_str, sizeof(date_str), RFC1123FMT, gmtime(&timer));
len = sprintf(iobuf,
- "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
- "Date: %s\r\nConnection: close\r\n",
- responseNum, responseString, mime_type, tmp_str);
+ "HTTP/1.0 %d %s\r\n"
+ "Content-type: %s\r\n"
+ "Date: %s\r\n"
+ "Connection: close\r\n",
+ responseNum, responseString,
+ /* if it's error message, then it's HTML */
+ (responseNum == HTTP_OK ? found_mime_type : "text/html"),
+ date_str
+ );
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
if (responseNum == HTTP_UNAUTHORIZED) {
len += sprintf(iobuf + len,
- "WWW-Authenticate: Basic realm=\"%s\"\r\n",
- g_realm);
+ "WWW-Authenticate: Basic realm=\"%.999s\"\r\n",
+ g_realm /* %.999s protects from overflowing iobuf[] */
+ );
}
#endif
if (responseNum == HTTP_MOVED_TEMPORARILY) {
- len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
+ /* Responding to "GET /dir" with
+ * "HTTP/1.0 302 Found" "Location: /dir/"
+ * - IOW, asking them to repeat with a slash.
+ * Here, overflow IS possible, can't use sprintf:
+ * mkdir test
+ * python -c 'print("get /test?" + ("x" * 8192))' | busybox httpd -i -h .
+ */
+ len += snprintf(iobuf + len, IOBUF_SIZE-3 - len,
+ "Location: %s/%s%s\r\n",
found_moved_temporarily,
(g_query ? "?" : ""),
- (g_query ? g_query : ""));
+ (g_query ? g_query : "")
+ );
+ if (len > IOBUF_SIZE-3)
+ len = IOBUF_SIZE-3;
}
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
if (error_page && access(error_page, R_OK) == 0) {
- strcat(iobuf, "\r\n");
- len += 2;
-
- if (DEBUG)
+ iobuf[len++] = '\r';
+ iobuf[len++] = '\n';
+ if (DEBUG) {
+ iobuf[len] = '\0';
fprintf(stderr, "headers: '%s'\n", iobuf);
+ }
full_write(STDOUT_FILENO, iobuf, len);
if (DEBUG)
fprintf(stderr, "writing error page: '%s'\n", error_page);
#endif
if (file_size != -1) { /* file */
- strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
+ strftime(date_str, sizeof(date_str), RFC1123FMT, gmtime(&last_mod));
#if ENABLE_FEATURE_HTTPD_RANGES
if (responseNum == HTTP_PARTIAL_CONTENT) {
- len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
+ len += sprintf(iobuf + len,
+ "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
range_start,
range_end,
- file_size);
+ file_size
+ );
file_size = range_end - range_start + 1;
}
#endif
#if ENABLE_FEATURE_HTTPD_RANGES
"Accept-Ranges: bytes\r\n"
#endif
- "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
- tmp_str,
+ "Last-Modified: %s\r\n"
+ "%s %"OFF_FMT"u\r\n",
+ date_str,
content_gzip ? "Transfer-length:" : "Content-length:",
file_size
);
if (infoString) {
len += sprintf(iobuf + len,
"<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
- "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
+ "<BODY><H1>%d %s</H1>\n"
+ "%s\n"
+ "</BODY></HTML>\n",
+ responseNum, responseString,
responseNum, responseString,
- responseNum, responseString, infoString);
+ infoString
+ );
}
- if (DEBUG)
+ if (DEBUG) {
+ iobuf[len] = '\0';
fprintf(stderr, "headers: '%s'\n", iobuf);
+ }
if (full_write(STDOUT_FILENO, iobuf, len) != len) {
if (verbose > 1)
bb_perror_msg("error");
alarm(HEADER_READ_TIMEOUT);
while (1) {
if (hdr_cnt <= 0) {
- hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
+ hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof_hdr_buf);
if (hdr_cnt <= 0)
break;
hdr_ptr = hdr_buf;
/* We expect data, prev data portion is eaten by CGI
* and there *is* data to read from the peer
* (POSTDATA) */
- //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
+ //count = post_len > (int)sizeof_hdr_buf ? (int)sizeof_hdr_buf : post_len;
//count = safe_read(STDIN_FILENO, hdr_buf, count);
- count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
+ count = safe_read(STDIN_FILENO, hdr_buf, sizeof_hdr_buf);
if (count > 0) {
hdr_cnt = count;
hdr_ptr = hdr_buf;
out_cnt += count;
count = 0;
/* "Status" header format is: "Status: 302 Redirected\r\n" */
- if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
+ if (out_cnt >= 7 && memcmp(rbuf, "Status:", 7) == 0) {
/* send "HTTP/1.0 " */
if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
break;
- rbuf += 8; /* skip "Status: " */
- count = out_cnt - 8;
+ rbuf += 7; /* skip "Status:" */
+ count = out_cnt - 7;
out_cnt = -1; /* buffering off */
} else if (out_cnt >= 4) {
/* Did CGI add "HTTP"? */
int proxy_fd;
len_and_sockaddr *lsa;
- proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
- if (proxy_fd < 0)
- send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
lsa = host2sockaddr(proxy_entry->host_port, 80);
if (lsa == NULL)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
+ proxy_fd = socket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
+ if (proxy_fd < 0)
+ send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
continue;
/* set the KEEPALIVE option to cull dead connections */
- setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
+ setsockopt_keepalive(n);
if (fork() == 0) {
/* child */
continue;
/* set the KEEPALIVE option to cull dead connections */
- setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
+ setsockopt_keepalive(n);
if (vfork() == 0) {
/* child */
projects / oweals / busybox.git / blobdiff