uclient-fetch: add support for --spider

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

diff --git a/uclient-fetch.c b/uclient-fetch.c
index ab29ceac2803e03dbf78cde41ee1904384596470..d4b95274310bc8a157fde4e37f564488764b0eef 100644 (file)
--- a/uclient-fetch.c
+++ b/uclient-fetch.c
@@ -42,6 +42,7 @@ static const struct ustream_ssl_ops *ssl_ops;
 static int quiet = false;
 static bool verify = true;
 static bool default_certs = false;
+static bool no_output;
 static const char *output_file;
 static int output_fd = -1;
 static int error_ret;
@@ -99,6 +100,8 @@ static void header_done_cb(struct uclient *cl)
        switch (cl->status_code) {
        case 204:
        case 200:
+               if (no_output)
+                       break;
                output_fd = open_output_file(cl->url->location, true);
                if (output_fd < 0) {
                        if (!quiet)
@@ -122,7 +125,7 @@ static void read_data_cb(struct uclient *cl)
        char buf[256];
        int len;
 
-       if (output_fd < 0)
+       if (!no_output && output_fd < 0)
                return;
 
        while (1) {
@@ -131,7 +134,8 @@ static void read_data_cb(struct uclient *cl)
                        return;
 
                out_bytes += len;
-               write(output_fd, buf, len);
+               if (!no_output)
+                       write(output_fd, buf, len);
        }
 }
 
@@ -266,6 +270,7 @@ static int usage(const char *progname)
                "       --password=<password>           HTTP authentication password\n"
                "       --user-agent|-U <str>           Set HTTP user agent\n"
                "       --post-data=STRING              use the POST method; send STRING as the data\n"
+               "       --spider|-s                     Spider mode - only check file existence\n"
                "\n"
                "HTTPS options:\n"
                "       --ca-certificate=<cert>:        Load CA certificates from file <cert>\n"
@@ -312,6 +317,7 @@ enum {
        L_PASSWORD,
        L_USER_AGENT,
        L_POST_DATA,
+       L_SPIDER,
 };
 
 static const struct option longopts[] = {
@@ -321,6 +327,7 @@ static const struct option longopts[] = {
        [L_PASSWORD] = { "password", required_argument },
        [L_USER_AGENT] = { "user-agent", required_argument },
        [L_POST_DATA] = { "post-data", required_argument },
+       [L_SPIDER] = { "spider", no_argument },
        {}
 };
 
@@ -337,7 +344,7 @@ int main(int argc, char **argv)
 
        init_ustream_ssl();
 
-       while ((ch = getopt_long(argc, argv, "qO:U:", longopts, &longopt_idx)) != -1) {
+       while ((ch = getopt_long(argc, argv, "O:qsU:", longopts, &longopt_idx)) != -1) {
                switch(ch) {
                case 0:
                        switch (longopt_idx) {
@@ -367,6 +374,9 @@ int main(int argc, char **argv)
                        case L_POST_DATA:
                                post_data = optarg;
                                break;
+                       case L_SPIDER:
+                               no_output = true;
+                               break;
                        default:
                                return usage(progname);
                        }
@@ -380,6 +390,9 @@ int main(int argc, char **argv)
                case 'q':
                        quiet = true;
                        break;
+               case 's':
+                       no_output = true;
+                       break;
                default:
                        return usage(progname);
                }