credential: add function for parsing url components
All of the components of a credential struct can be found in
a URL. For example, the URL:
http://foo:bar@example.com/repo.git
contains:
protocol=http
host=example.com
path=repo.git
username=foo
password=bar
We want to be able to turn URLs into broken-down credential
structs so that we know two things:
1. Which parts of the username/password we still need
2. What the context of the request is (for prompting or
as a key for storing credentials).
This code is based on http_auth_init in http.c, but needed a
few modifications in order to get all of the components that
the credential object is interested in.
Once the http code is switched over to the credential API,
then http_auth_init can just go away.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/technical/api-credentials.txt b/Documentation/technical/api-credentials.txt
index f624aef..21ca6a2 100644
--- a/Documentation/technical/api-credentials.txt
+++ b/Documentation/technical/api-credentials.txt
@@ -67,6 +67,10 @@
that they may store the result to be used again. Any errors
from helpers are ignored.
+`credential_from_url`::
+
+ Parse a URL into broken-down credential fields.
+
Example
-------
diff --git a/credential.c b/credential.c
index 86397f3..c349b9a 100644
--- a/credential.c
+++ b/credential.c
@@ -2,6 +2,7 @@
#include "credential.h"
#include "string-list.h"
#include "run-command.h"
+#include "url.h"
void credential_init(struct credential *c)
{
@@ -232,3 +233,54 @@
c->password = NULL;
c->approved = 0;
}
+
+void credential_from_url(struct credential *c, const char *url)
+{
+ const char *at, *colon, *cp, *slash, *host, *proto_end;
+
+ credential_clear(c);
+
+ /*
+ * Match one of:
+ * (1) proto://<host>/...
+ * (2) proto://<user>@<host>/...
+ * (3) proto://<user>:<pass>@<host>/...
+ */
+ proto_end = strstr(url, "://");
+ if (!proto_end)
+ return;
+ cp = proto_end + 3;
+ at = strchr(cp, '@');
+ colon = strchr(cp, ':');
+ slash = strchrnul(cp, '/');
+
+ if (!at || slash <= at) {
+ /* Case (1) */
+ host = cp;
+ }
+ else if (!colon || at <= colon) {
+ /* Case (2) */
+ c->username = url_decode_mem(cp, at - cp);
+ host = at + 1;
+ } else {
+ /* Case (3) */
+ c->username = url_decode_mem(cp, colon - cp);
+ c->password = url_decode_mem(colon + 1, at - (colon + 1));
+ host = at + 1;
+ }
+
+ if (proto_end - url > 0)
+ c->protocol = xmemdupz(url, proto_end - url);
+ if (slash - host > 0)
+ c->host = url_decode_mem(host, slash - host);
+ /* Trim leading and trailing slashes from path */
+ while (*slash == '/')
+ slash++;
+ if (*slash) {
+ char *p;
+ c->path = url_decode(slash);
+ p = c->path + strlen(c->path) - 1;
+ while (p > c->path && *p == '/')
+ *p-- = '\0';
+ }
+}
diff --git a/credential.h b/credential.h
index 2ea7d49..8a6d162 100644
--- a/credential.h
+++ b/credential.h
@@ -24,5 +24,6 @@
void credential_reject(struct credential *);
int credential_read(struct credential *, FILE *);
+void credential_from_url(struct credential *, const char *url);
#endif /* CREDENTIAL_H */
