MINOR: http: Add a function to get the authority into a URI
The function http_get_authority() may be used to parse a URI and looks for the
authority, between the scheme and the path. An option may be used to skip the
user info (part before the '@'). Most of time, the user info will be ignored.
diff --git a/src/http.c b/src/http.c
index fe7ed4c..c916866 100644
--- a/src/http.c
+++ b/src/http.c
@@ -476,6 +476,62 @@
}
}
+/* Parse the uri and looks for the authority, between the scheme and the
+ * path. if no_userinfo is not zero, the part before the '@' (including it) is
+ * skipped. If not found, an empty ist is returned. Otherwise, the ist pointing
+ * on the authority is returned.
+ */
+struct ist http_get_authority(const struct ist uri, int no_userinfo)
+{
+ const char *ptr, *start, *end;
+
+ if (!uri.len)
+ goto not_found;
+
+ ptr = uri.ptr;
+ start = ptr;
+ end = ptr + uri.len;
+
+ /* RFC7230, par. 2.7 :
+ * Request-URI = "*" | absuri | abspath | authority
+ */
+
+ if (*ptr == '*' || *ptr == '/')
+ goto not_found;
+
+ if (isalpha((unsigned char)*ptr)) {
+ /* this is a scheme as described by RFC3986, par. 3.1, or only
+ * an authority (in case of a CONNECT method).
+ */
+ ptr++;
+ while (ptr < end &&
+ (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
+ ptr++;
+ /* skip '://' or take the whole as authority if not found */
+ if (ptr == end || *ptr++ != ':')
+ goto authority;
+ if (ptr == end || *ptr++ != '/')
+ goto authority;
+ if (ptr == end || *ptr++ != '/')
+ goto authority;
+ }
+
+ start = ptr;
+ while (ptr < end && *ptr != '/') {
+ if (*ptr++ == '@' && no_userinfo)
+ start = ptr;
+ }
+
+ /* OK, ptr point on the '/' or the end */
+ end = ptr;
+
+ authority:
+ return ist2(start, end - start);
+
+ not_found:
+ return ist2(NULL, 0);
+}
+
/* Parse the URI from the given transaction (which is assumed to be in request
* phase) and look for the "/" beginning the PATH. If not found, ist2(0,0) is
* returned. Otherwise the pointer and length are returned.