uclient-example.c

   1 #include <libubox/blobmsg.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4
   5 #include "uclient.h"
   6
   7 static void example_header_done(struct uclient *cl)
   8 {
   9         struct blob_attr *cur;
  10         int rem;
  11
  12         printf("Headers (%d): \n", cl->status_code);
  13         blobmsg_for_each_attr(cur, cl->meta, rem) {
  14                 printf("%s=%s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
  15         }
  16
  17         printf("Contents:\n");
  18 }
  19
  20 static void example_read_data(struct uclient *cl)
  21 {
  22         char buf[256];
  23         int len;
  24
  25         while (1) {
  26                 len = uclient_read(cl, buf, sizeof(buf));
  27                 if (!len)
  28                         return;
  29
  30                 write(STDOUT_FILENO, buf, len);
  31         }
  32 }
  33
  34 static void example_request_sm(struct uclient *cl)
  35 {
  36         static int i = 0;
  37
  38         switch (i++) {
  39         case 0:
  40                 uclient_connect(cl);
  41                 uclient_http_set_request_type(cl, "HEAD");
  42                 uclient_request(cl);
  43                 break;
  44         case 1:
  45                 uclient_connect(cl);
  46                 uclient_http_set_request_type(cl, "GET");
  47                 uclient_request(cl);
  48                 break;
  49         default:
  50                 uclient_free(cl);
  51                 uloop_end();
  52                 break;
  53         };
  54 }
  55
  56 static void example_eof(struct uclient *cl)
  57 {
  58         example_request_sm(cl);
  59 }
  60
  61 static const struct uclient_cb cb = {
  62         .header_done = example_header_done,
  63         .data_read = example_read_data,
  64         .data_eof = example_eof,
  65 };
  66
  67 int main(int argc, char **argv)
  68 {
  69         struct uclient *cl;
  70
  71         if (argc != 2) {
  72                 fprintf(stderr, "Usage: %s <URL>\n", argv[0]);
  73                 return 1;
  74         }
  75
  76         uloop_init();
  77         cl = uclient_new(argv[1], &cb);
  78         if (!cl) {
  79                 fprintf(stderr, "Failed to allocate uclient context\n");
  80                 return 1;
  81         }
  82         example_request_sm(cl);
  83         uloop_run();
  84         uloop_done();
  85
  86         return 0;
  87 }