uclient-example.c

   1 #include <libubox/blobmsg.h>
   2
   3 #include "uclient.h"
   4
   5 static void example_header_done(struct uclient *cl)
   6 {
   7         struct blob_attr *cur;
   8         int rem;
   9
  10         fprintf(stderr, "Headers: \n");
  11         blobmsg_for_each_attr(cur, cl->meta, rem) {
  12                 fprintf(stderr, "%s=%s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
  13         }
  14
  15         fprintf(stderr, "Contents:\n");
  16 }
  17
  18 static void example_read_data(struct uclient *cl)
  19 {
  20         char buf[256];
  21         int len;
  22
  23         while (1) {
  24                 len = uclient_read(cl, buf, sizeof(buf));
  25                 if (!len)
  26                         return;
  27
  28                 fwrite(buf, len, 1, stderr);
  29         }
  30 }
  31
  32 static void example_request_sm(struct uclient *cl)
  33 {
  34         static int i = 0;
  35
  36         switch (i++) {
  37         case 0:
  38                 uclient_connect(cl);
  39                 uclient_http_set_request_type(cl, "HEAD");
  40                 uclient_request(cl);
  41                 break;
  42         case 1:
  43                 uclient_connect(cl);
  44                 uclient_http_set_request_type(cl, "GET");
  45                 uclient_request(cl);
  46                 break;
  47         default:
  48                 uclient_free(cl);
  49                 uloop_end();
  50                 break;
  51         };
  52 }
  53
  54 static void example_eof(struct uclient *cl)
  55 {
  56         example_request_sm(cl);
  57 }
  58
  59 static const struct uclient_cb cb = {
  60         .header_done = example_header_done,
  61         .data_read = example_read_data,
  62         .data_eof = example_eof,
  63 };
  64
  65 int main(int argc, char **argv)
  66 {
  67         struct uclient *cl;
  68
  69         if (argc != 2) {
  70                 fprintf(stderr, "Usage: %s <URL>\n", argv[0]);
  71                 return 1;
  72         }
  73
  74         uloop_init();
  75         cl = uclient_new(argv[1], &cb);
  76         if (!cl) {
  77                 fprintf(stderr, "Failed to allocate uclient context\n");
  78                 return 1;
  79         }
  80         example_request_sm(cl);
  81         uloop_run();
  82         uloop_done();
  83
  84         return 0;
  85 }