+static void http_auth_init(const char *url)
+{
+ char *at, *colon, *cp, *slash;
+ int len;
+
+ cp = strstr(url, "://");
+ if (!cp)
+ return;
+
+ /*
+ * Ok, the URL looks like "proto://something". Which one?
+ * "proto://<user>:<pass>@<host>/...",
+ * "proto://<user>@<host>/...", or just
+ * "proto://<host>/..."?
+ */
+ cp += 3;
+ at = strchr(cp, '@');
+ colon = strchr(cp, ':');
+ slash = strchrnul(cp, '/');
+ if (!at || slash <= at)
+ return; /* No credentials */
+ if (!colon || at <= colon) {
+ /* Only username */
+ len = at - cp;
+ user_name = xmalloc(len + 1);
+ memcpy(user_name, cp, len);
+ user_name[len] = '\0';
+ user_pass = NULL;
+ } else {
+ len = colon - cp;
+ user_name = xmalloc(len + 1);
+ memcpy(user_name, cp, len);
+ user_name[len] = '\0';
+ len = at - (colon + 1);
+ user_pass = xmalloc(len + 1);
+ memcpy(user_pass, colon + 1, len);
+ user_pass[len] = '\0';
+ }
+}
+
+static void set_from_env(const char **var, const char *envname)
+{
+ const char *val = getenv(envname);
+ if (val)
+ *var = val;
+}
+