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Diffstat (limited to 'networking')
-rw-r--r--networking/wget.c105
1 files changed, 49 insertions, 56 deletions
diff --git a/networking/wget.c b/networking/wget.c
index 1da18ff77..026722afc 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -34,7 +34,7 @@ static off_t beg_range; /* Range at which continue begins */
#if ENABLE_FEATURE_WGET_STATUSBAR
static off_t transferred; /* Number of bytes transferred so far */
#endif
-static int chunked; /* chunked transfer encoding */
+static bool chunked; /* chunked transfer encoding */
#if ENABLE_FEATURE_WGET_STATUSBAR
static void progressmeter(int flag);
static const char *curfile; /* Name of current file being transferred */
@@ -76,9 +76,7 @@ static char *safe_fgets(char *s, int size, FILE *stream)
}
#if ENABLE_FEATURE_WGET_AUTHENTICATION
-/*
- * Base64-encode character string and return the string.
- */
+/* Base64-encode character string and return the string. */
static char *base64enc(unsigned char *p, char *buf, int len)
{
bb_uuencode(p, buf, len, bb_uuenc_tbl_base64);
@@ -96,7 +94,7 @@ int wget_main(int argc, char **argv)
int port;
int try = 5;
unsigned opt;
- char *s;
+ char *str;
char *proxy = 0;
char *dir_prefix = NULL;
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
@@ -104,20 +102,20 @@ int wget_main(int argc, char **argv)
llist_t *headers_llist = NULL;
#endif
- /* server.allocated = target.allocated = NULL; */
-
FILE *sfp = NULL; /* socket to web/ftp server */
FILE *dfp = NULL; /* socket to ftp server (data) */
char *fname_out = NULL; /* where to direct output (-O) */
- int got_clen = 0; /* got content-length: from server */
+ bool got_clen = 0; /* got content-length: from server */
int output_fd = -1;
- int use_proxy = 1; /* Use proxies if env vars are set */
+ bool use_proxy = 1; /* Use proxies if env vars are set */
const char *proxy_flag = "on"; /* Use proxies if env vars are set */
- const char *user_agent = "Wget";/* Content of the "User-Agent" header field */
-
- /*
- * Crack command line.
- */
+ const char *user_agent = "Wget";/* "User-Agent" header field */
+ static const char * const keywords[] = {
+ "content-length", "transfer-encoding", "chunked", "location", NULL
+ };
+ enum {
+ KEY_content_length = 1, KEY_transfer_encoding, KEY_chunked, KEY_location
+ };
enum {
WGET_OPT_CONTINUE = 0x1,
WGET_OPT_SPIDER = 0x2,
@@ -131,7 +129,7 @@ int wget_main(int argc, char **argv)
};
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
static const struct option wget_long_options[] = {
- // name, has_arg, flag, val
+ /* name, has_arg, flag, val */
{ "continue", no_argument, NULL, 'c' },
{ "spider", no_argument, NULL, 's' },
{ "quiet", no_argument, NULL, 'q' },
@@ -145,6 +143,7 @@ int wget_main(int argc, char **argv)
};
applet_long_options = wget_long_options;
#endif
+ /* server.allocated = target.allocated = NULL; */
opt_complementary = "-1" USE_FEATURE_WGET_LONG_OPTIONS(":\xfe::");
opt = getopt32(argc, argv, "csqO:P:Y:U:",
&fname_out, &dir_prefix,
@@ -152,7 +151,7 @@ int wget_main(int argc, char **argv)
USE_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
);
if (strcmp(proxy_flag, "off") == 0) {
- /* Use the proxy if necessary. */
+ /* Use the proxy if necessary */
use_proxy = 0;
}
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
@@ -176,9 +175,7 @@ int wget_main(int argc, char **argv)
server.host = target.host;
server.port = target.port;
- /*
- * Use the proxy if necessary.
- */
+ /* Use the proxy if necessary */
if (use_proxy) {
proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
if (proxy && *proxy) {
@@ -217,9 +214,7 @@ int wget_main(int argc, char **argv)
if ((opt & WGET_OPT_CONTINUE) && !fname_out)
bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); */
- /*
- * Determine where to start transfer.
- */
+ /* Determine where to start transfer */
if (LONE_DASH(fname_out)) {
output_fd = 1;
opt &= ~WGET_OPT_CONTINUE;
@@ -253,15 +248,11 @@ int wget_main(int argc, char **argv)
if (!--try)
bb_error_msg_and_die("too many redirections");
- /*
- * Open socket to http server
- */
+ /* Open socket to http server */
if (sfp) fclose(sfp);
sfp = open_socket(lsa);
- /*
- * Send HTTP request.
- */
+ /* Send HTTP request. */
if (use_proxy) {
fprintf(sfp, "GET %stp://%s/%s HTTP/1.1\r\n",
target.is_ftp ? "f" : "ht", target.host,
@@ -299,12 +290,12 @@ int wget_main(int argc, char **argv)
if (fgets(buf, sizeof(buf), sfp) == NULL)
bb_error_msg_and_die("no response from server");
- s = buf;
- while (*s != '\0' && !isspace(*s)) ++s;
- s = skip_whitespace(s);
+ str = buf;
+ str = skip_non_whitespace(str);
+ str = skip_whitespace(str);
// FIXME: no error check
// xatou wouldn't work: "200 OK"
- status = atoi(s);
+ status = atoi(str);
switch (status) {
case 0:
case 100:
@@ -331,26 +322,28 @@ int wget_main(int argc, char **argv)
/*
* Retrieve HTTP headers.
*/
- while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
- if (strcasecmp(buf, "content-length") == 0) {
- content_len = BB_STRTOOFF(s, NULL, 10);
+ while ((str = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
+ /* gethdr did already convert the "FOO:" string to lowercase */
+ smalluint key = index_in_str_array(keywords, *&buf) + 1;
+ if (key == KEY_content_length) {
+ content_len = BB_STRTOOFF(str, NULL, 10);
if (errno || content_len < 0) {
- bb_error_msg_and_die("content-length %s is garbage", s);
+ bb_error_msg_and_die("content-length %s is garbage", str);
}
got_clen = 1;
continue;
}
- if (strcasecmp(buf, "transfer-encoding") == 0) {
- if (strcasecmp(s, "chunked") != 0)
- bb_error_msg_and_die("server wants to do %s transfer encoding", s);
+ if (key == KEY_transfer_encoding) {
+ if (index_in_str_array(keywords, str_tolower(str)) + 1 != KEY_chunked)
+ bb_error_msg_and_die("server wants to do %s transfer encoding", str);
chunked = got_clen = 1;
}
- if (strcasecmp(buf, "location") == 0) {
- if (s[0] == '/')
+ if (key == KEY_location) {
+ if (str[0] == '/')
/* free(target.allocated); */
- target.path = /* target.allocated = */ xstrdup(s+1);
+ target.path = /* target.allocated = */ xstrdup(str+1);
else {
- parse_url(s, &target);
+ parse_url(str, &target);
if (use_proxy == 0) {
server.host = target.host;
server.port = target.port;
@@ -381,14 +374,14 @@ int wget_main(int argc, char **argv)
* Splitting username:password pair,
* trying to log in
*/
- s = strchr(target.user, ':');
- if (s)
- *(s++) = '\0';
+ str = strchr(target.user, ':');
+ if (str)
+ *(str++) = '\0';
switch (ftpcmd("USER ", target.user, sfp, buf)) {
case 230:
break;
case 331:
- if (ftpcmd("PASS ", s, sfp, buf) == 230)
+ if (ftpcmd("PASS ", str, sfp, buf) == 230)
break;
/* FALLTHRU (failed login) */
default:
@@ -418,15 +411,15 @@ int wget_main(int argc, char **argv)
// Response is "227 garbageN1,N2,N3,N4,P1,P2[)garbage]
// Server's IP is N1.N2.N3.N4 (we ignore it)
// Server's port for data connection is P1*256+P2
- s = strrchr(buf, ')');
- if (s) s[0] = '\0';
- s = strrchr(buf, ',');
- if (!s) goto pasv_error;
- port = xatou_range(s+1, 0, 255);
- *s = '\0';
- s = strrchr(buf, ',');
- if (!s) goto pasv_error;
- port += xatou_range(s+1, 0, 255) * 256;
+ str = strrchr(buf, ')');
+ if (str) str[0] = '\0';
+ str = strrchr(buf, ',');
+ if (!str) goto pasv_error;
+ port = xatou_range(str+1, 0, 255);
+ *str = '\0';
+ str = strrchr(buf, ',');
+ if (!str) goto pasv_error;
+ port += xatou_range(str+1, 0, 255) * 256;
set_nport(lsa, htons(port));
dfp = open_socket(lsa);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 11:09:10 +0000