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Diffstat (limited to 'networking/wget.c')
-rw-r--r--networking/wget.c74
1 files changed, 40 insertions, 34 deletions
diff --git a/networking/wget.c b/networking/wget.c
index 931882fde..d81426e8d 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -10,6 +10,10 @@
*/
#include "libbb.h"
+//#define log_io(...) bb_error_msg(__VA_ARGS__)
+#define log_io(...) ((void)0)
+
+
struct host_info {
// May be used if we ever will want to free() all xstrdup()s...
/* char *allocated; */
@@ -197,25 +201,39 @@ static FILE *open_socket(len_and_sockaddr *lsa)
return fp;
}
+/* Returns '\n' if it was seen, else '\0'. Trims at first '\r' or '\n' */
+static char fgets_and_trim(FILE *fp)
+{
+ char c;
+ char *buf_ptr;
+
+ if (fgets(G.wget_buf, sizeof(G.wget_buf) - 1, fp) == NULL)
+ bb_perror_msg_and_die("error getting response");
+
+ buf_ptr = strchrnul(G.wget_buf, '\n');
+ c = *buf_ptr;
+ *buf_ptr = '\0';
+ buf_ptr = strchrnul(G.wget_buf, '\r');
+ *buf_ptr = '\0';
+
+ log_io("< %s", G.wget_buf);
+
+ return c;
+}
+
static int ftpcmd(const char *s1, const char *s2, FILE *fp)
{
int result;
if (s1) {
- if (!s2) s2 = "";
+ if (!s2)
+ s2 = "";
fprintf(fp, "%s%s\r\n", s1, s2);
fflush(fp);
+ log_io("> %s%s", s1, s2);
}
do {
- char *buf_ptr;
-
- if (fgets(G.wget_buf, sizeof(G.wget_buf)-2, fp) == NULL) {
- bb_perror_msg_and_die("error getting response");
- }
- buf_ptr = strstr(G.wget_buf, "\r\n");
- if (buf_ptr) {
- *buf_ptr = '\0';
- }
+ fgets_and_trim(fp);
} while (!isdigit(G.wget_buf[0]) || G.wget_buf[3] != ' ');
G.wget_buf[3] = '\0';
@@ -284,7 +302,7 @@ static void parse_url(char *src_url, struct host_info *h)
sp = h->host;
}
-static char *gethdr(FILE *fp /*, int *istrunc*/)
+static char *gethdr(FILE *fp)
{
char *s, *hdrval;
int c;
@@ -292,19 +310,16 @@ static char *gethdr(FILE *fp /*, int *istrunc*/)
/* *istrunc = 0; */
/* retrieve header line */
- if (fgets(G.wget_buf, sizeof(G.wget_buf), fp) == NULL)
- return NULL;
+ c = fgets_and_trim(fp);
- /* see if we are at the end of the headers */
- for (s = G.wget_buf; *s == '\r'; ++s)
- continue;
- if (*s == '\n')
+ /* end of the headers? */
+ if (G.wget_buf[0] == '\0')
return NULL;
/* convert the header name to lower case */
for (s = G.wget_buf; isalnum(*s) || *s == '-' || *s == '.'; ++s) {
/* tolower for "A-Z", no-op for "0-9a-z-." */
- *s = (*s | 0x20);
+ *s |= 0x20;
}
/* verify we are at the end of the header name */
@@ -315,20 +330,12 @@ static char *gethdr(FILE *fp /*, int *istrunc*/)
*s++ = '\0';
hdrval = skip_whitespace(s);
- /* locate the end of header */
- while (*s && *s != '\r' && *s != '\n')
- ++s;
-
- /* end of header found */
- if (*s) {
- *s = '\0';
- return hdrval;
+ if (c != '\n') {
+ /* Rats! The buffer isn't big enough to hold the entire header value */
+ while (c = getc(fp), c != EOF && c != '\n')
+ continue;
}
- /* Rats! The buffer isn't big enough to hold the entire header value */
- while (c = getc(fp), c != EOF && c != '\n')
- continue;
- /* *istrunc = 1; */
return hdrval;
}
@@ -520,9 +527,9 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
if (!G.chunked)
break;
- fgets(G.wget_buf, sizeof(G.wget_buf), dfp); /* This is a newline */
+ fgets_and_trim(dfp); /* This is a newline */
get_clen:
- fgets(G.wget_buf, sizeof(G.wget_buf), dfp);
+ fgets_and_trim(dfp);
G.content_len = STRTOOFF(G.wget_buf, NULL, 16);
/* FIXME: error check? */
if (G.content_len == 0)
@@ -757,8 +764,7 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
* Retrieve HTTP response line and check for "200" status code.
*/
read_response:
- if (fgets(G.wget_buf, sizeof(G.wget_buf), sfp) == NULL)
- bb_error_msg_and_die("no response from server");
+ fgets_and_trim(sfp);
str = G.wget_buf;
str = skip_non_whitespace(str);