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git/urlmatch.h

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config: add helper to normalize and match URLs Some http.* configuration variables need to take values customized for the URL we are talking to. We may want to set http.sslVerify to true in general but to false only for a certain site, for example, with a configuration file like this: [http] sslVerify = true [http "https://weak.example.com"] sslVerify = false and let the configuration machinery pick up the latter only when talking to "https://weak.example.com". The latter needs to kick in not only when the URL is exactly "https://weak.example.com", but also is anything that "match" it, e.g. https://weak.example.com/test https://me@weak.example.com/test The <url> in the configuration key consists of the following parts, and is considered a match to the URL we are attempting to access under certain conditions: . Scheme (e.g., `https` in `https://example.com/`). This field must match exactly between the config key and the URL. . Host/domain name (e.g., `example.com` in `https://example.com/`). This field must match exactly between the config key and the URL. . Port number (e.g., `8080` in `http://example.com:8080/`). This field must match exactly between the config key and the URL. Omitted port numbers are automatically converted to the correct default for the scheme before matching. . Path (e.g., `repo.git` in `https://example.com/repo.git`). The path field of the config key must match the path field of the URL either exactly or as a prefix of slash-delimited path elements. A config key with path `foo/` matches URL path `foo/bar`. A prefix can only match on a slash (`/`) boundary. Longer matches take precedence (so a config key with path `foo/bar` is a better match to URL path `foo/bar` than a config key with just path `foo/`). . User name (e.g., `me` in `https://me@example.com/repo.git`). If the config key has a user name, it must match the user name in the URL exactly. If the config key does not have a user name, that config key will match a URL with any user name (including none), but at a lower precedence than a config key with a user name. Longer matches take precedence over shorter matches. This step adds two helper functions `url_normalize()` and `match_urls()` to help implement the above semantics. The normalization rules are based on RFC 3986 and should result in any two equivalent urls being a match. Signed-off-by: Kyle J. McKay <mackyle@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-31 22:52:00 +02:00
#ifndef URL_MATCH_H
#include "string-list.h"
struct url_info {
/* normalized url on success, must be freed, otherwise NULL */
char *url;
/* if !url, a brief reason for the failure, otherwise NULL */
const char *err;
/* the rest of the fields are only set if url != NULL */
size_t url_len; /* total length of url (which is now normalized) */
size_t scheme_len; /* length of scheme name (excluding final :) */
size_t user_off; /* offset into url to start of user name (0 => none) */
size_t user_len; /* length of user name; if user_off != 0 but
user_len == 0, an empty user name was given */
size_t passwd_off; /* offset into url to start of passwd (0 => none) */
size_t passwd_len; /* length of passwd; if passwd_off != 0 but
passwd_len == 0, an empty passwd was given */
size_t host_off; /* offset into url to start of host name (0 => none) */
size_t host_len; /* length of host name; this INCLUDES any ':portnum';
* file urls may have host_len == 0 */
size_t port_len; /* if a portnum is present (port_len != 0), it has
* this length (excluding the leading ':') at the
* end of the host name (always 0 for file urls) */
size_t path_off; /* offset into url to the start of the url path;
* this will always point to a '/' character
* after the url has been normalized */
size_t path_len; /* length of path portion excluding any trailing
* '?...' and '#...' portion; will always be >= 1 */
};
extern char *url_normalize(const char *, struct url_info *);
config: add generic callback wrapper to parse section.<url>.key Existing configuration parsing functions (e.g. http_options() in http.c) know how to parse two-level configuration variable names. We would like to exploit them and parse something like this: [http] sslVerify = true [http "https://weak.example.com"] sslVerify = false and pretend as if http.sslVerify were set to false when talking to "https://weak.example.com/path". Introduce `urlmatch_config_entry()` wrapper that: - is called with the target URL (e.g. "https://weak.example.com/path"), and the two-level variable parser (e.g. `http_options`); - uses `url_normalize()` and `match_urls()` to see if configuration data matches the target URL; and - calls the traditional two-level configuration variable parser only for the configuration data whose <url> part matches the target URL (and if there are multiple matches, only do so if the current match is a better match than the ones previously seen). Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-31 19:42:01 +02:00
struct urlmatch_item {
size_t matched_len;
char user_matched;
};
struct urlmatch_config {
struct string_list vars;
struct url_info url;
const char *section;
const char *key;
void *cb;
int (*collect_fn)(const char *var, const char *value, void *cb);
int (*cascade_fn)(const char *var, const char *value, void *cb);
};
extern int urlmatch_config_entry(const char *var, const char *value, void *cb);
config: add helper to normalize and match URLs Some http.* configuration variables need to take values customized for the URL we are talking to. We may want to set http.sslVerify to true in general but to false only for a certain site, for example, with a configuration file like this: [http] sslVerify = true [http "https://weak.example.com"] sslVerify = false and let the configuration machinery pick up the latter only when talking to "https://weak.example.com". The latter needs to kick in not only when the URL is exactly "https://weak.example.com", but also is anything that "match" it, e.g. https://weak.example.com/test https://me@weak.example.com/test The <url> in the configuration key consists of the following parts, and is considered a match to the URL we are attempting to access under certain conditions: . Scheme (e.g., `https` in `https://example.com/`). This field must match exactly between the config key and the URL. . Host/domain name (e.g., `example.com` in `https://example.com/`). This field must match exactly between the config key and the URL. . Port number (e.g., `8080` in `http://example.com:8080/`). This field must match exactly between the config key and the URL. Omitted port numbers are automatically converted to the correct default for the scheme before matching. . Path (e.g., `repo.git` in `https://example.com/repo.git`). The path field of the config key must match the path field of the URL either exactly or as a prefix of slash-delimited path elements. A config key with path `foo/` matches URL path `foo/bar`. A prefix can only match on a slash (`/`) boundary. Longer matches take precedence (so a config key with path `foo/bar` is a better match to URL path `foo/bar` than a config key with just path `foo/`). . User name (e.g., `me` in `https://me@example.com/repo.git`). If the config key has a user name, it must match the user name in the URL exactly. If the config key does not have a user name, that config key will match a URL with any user name (including none), but at a lower precedence than a config key with a user name. Longer matches take precedence over shorter matches. This step adds two helper functions `url_normalize()` and `match_urls()` to help implement the above semantics. The normalization rules are based on RFC 3986 and should result in any two equivalent urls being a match. Signed-off-by: Kyle J. McKay <mackyle@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-31 22:52:00 +02:00
#endif /* URL_MATCH_H */
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