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MINOR: http: Add a function to get the authority into a URI

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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.
This commit is contained in:
Christopher Faulet 2019-10-08 14:56:58 +02:00
parent 9a67c293b9
commit 16fdc55f79
2 changed files with 57 additions and 0 deletions
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1
include/common/http.h
View File

@ -136,6 +136,7 @@ extern const char *HTTP_407_fmt;
enum http_meth_t find_http_meth(const char *str, const int len);
int http_get_status_idx(unsigned int status);
const char *http_get_reason(unsigned int status);
struct ist http_get_authority(const struct ist uri, int no_userinfo);
struct ist http_get_path(const struct ist uri);
int http_header_match2(const char *hdr, const char *end,
const char *name, int len);

56
src/http.c
View File

@ -476,6 +476,62 @@ const char *http_get_reason(unsigned int status)
}
}
/* 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.