Re: problem cloning via http since v1.6.6-rc0

[Tay Ray Chuan <rctay89@gmail.com>]

Hi,

On Thu, 21 Jan 2010 14:47:37 +0800
Tay Ray Chuan <rctay89@gmail.com> wrote:
> On Thu, Jan 21, 2010 at 1:08 PM, Ilari Liusvaara
> <ilari.liusvaara@elisanet.fi> wrote:
> > Looks like remote-curl (which handles http) issues request for:
> >
> > '.../info/refs?service=git-upload-pack'
> >
> > And expects that if there is no smart HTTP server there for the request to be
> > interpretted as:
> >
> > '.../info/refs'
> >
> > (i.e. webserver would ignore the query). This isn't true for git.debian.org.
> > Requesting the latter works (and the data formatting looks sane), but the
> > former is 404. This causes the fetch to fail.
> 
> afaik, putting a "?var1=val1&var2=...." still makes it a normal GET
> request, even if the url requested is just a plain file and not some
> cgi handler that uses those variables/values.

Yaroslav, sorry for making you run in circles - it really is git's
fault (sorta).

In recent versions of git, we were sending out the GET request for
info/refs with a query string (?serivce=<service name>). I'm not sure
why, but your server is not playing nice when the query string is
appended.

Could you try this patch and see if it solves the issue? I manage to
clone your repo successfully with it.

-- 
Cheers,
Ray Chuan

-->8--
Subject: [PATCH] http/remote-curl: coddle picky servers

When "info/refs" is a static file and not behind a CGI handler, some
servers may not handle a GET request for it with a query string
appended (eg. "?foo=bar") properly.

If such a request fails, retry it sans the query string, and also
discount the possibility of using the "smart" protocol (since no
service is specified with "?service=<service name>").

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
---
 remote-curl.c |   18 ++++++++++++++++--
 1 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/remote-curl.c b/remote-curl.c
index 1361006..a904164 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -102,7 +102,7 @@ static struct discovery* discover_refs(const char *service)
 	struct strbuf buffer = STRBUF_INIT;
 	struct discovery *last = last_discovery;
 	char *refs_url;
-	int http_ret, is_http = 0;
+	int http_ret, is_http = 0, proto_git_candidate = 1;
 
 	if (last && !strcmp(service, last->service))
 		return last;
@@ -121,6 +121,19 @@ static struct discovery* discover_refs(const char *service)
 
 	init_walker();
 	http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
+
+	/* try again with "plain" url (no ? or & appended) */
+	if (http_ret != HTTP_OK) {
+		free(refs_url);
+		strbuf_reset(&buffer);
+
+		proto_git_candidate = 0;
+		strbuf_addf(&buffer, "%s/info/refs", url);
+		refs_url = strbuf_detach(&buffer, NULL);
+
+		http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
+	}
+
 	switch (http_ret) {
 	case HTTP_OK:
 		break;
@@ -137,7 +150,8 @@ static struct discovery* discover_refs(const char *service)
 	last->buf_alloc = strbuf_detach(&buffer, &last->len);
 	last->buf = last->buf_alloc;
 
-	if (is_http && 5 <= last->len && last->buf[4] == '#') {
+	if (is_http && proto_git_candidate
+		&& 5 <= last->len && last->buf[4] == '#') {
 		/* smart HTTP response; validate that the service
 		 * pkt-line matches our request.
 		 */
-- 
1.6.6.1.337.g96bc8