static void fetch_symref(const char *path, char **symref, struct object_id *oid)
{
char *url = xstrfmt("%s%s", repo->url, path);
struct strbuf buffer = STRBUF_INIT;
const char *name;
if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
die("Couldn't get %s for remote symref\n%s", url,
curl_errorstr);
free(url);
FREE_AND_NULL(*symref);
oidclr(oid);
if (buffer.len == 0)
return;
/* Cut off trailing newline. */
strbuf_rtrim(&buffer);
/* If it's a symref, set the refname; otherwise try for a sha1 */
if (skip_prefix(buffer.buf, "ref: ", &name)) {
*symref = xmemdupz(name, buffer.len - (name - buffer.buf));
} else {
get_oid_hex(buffer.buf, oid);
}
strbuf_release(&buffer);
}
static int remote_exists(const char *path)
{
char *url = xstrfmt("%s%s", repo->url, path);
int ret;
switch (http_get_strbuf(url, NULL, NULL)) {
case HTTP_OK:
ret = 1;
break;
case HTTP_MISSING_TARGET:
ret = 0;
break;
case HTTP_ERROR:
error("unable to access '%s': %s", url, curl_errorstr);
/* fallthrough */
default:
ret = -1;
}
free(url);
return ret;
}
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, proto_git_candidate = 1;
if (last && !strcmp(service, last->service))
return last;
free_discovery(last);
strbuf_addf(&buffer, "%sinfo/refs", url);
if (!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) {
is_http = 1;
if (!strchr(url, '?'))
strbuf_addch(&buffer, '?');
else
strbuf_addch(&buffer, '&');
strbuf_addf(&buffer, "service=%s", service);
}
refs_url = strbuf_detach(&buffer, NULL);
http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
/* try again with "plain" url (no ? or & appended) */
if (http_ret != HTTP_OK && http_ret != HTTP_NOAUTH) {
free(refs_url);
strbuf_reset(&buffer);
proto_git_candidate = 0;
strbuf_addf(&buffer, "%sinfo/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;
case HTTP_MISSING_TARGET:
die("%s not found: did you run git update-server-info on the"
" server?", refs_url);
case HTTP_NOAUTH:
die("Authentication failed");
default:
http_error(refs_url, http_ret);
die("HTTP request failed");
}
last= xcalloc(1, sizeof(*last_discovery));
last->service = service;
last->buf_alloc = strbuf_detach(&buffer, &last->len);
last->buf = last->buf_alloc;
if (is_http && proto_git_candidate
&& 5 <= last->len && last->buf[4] == '#') {
/* smart HTTP response; validate that the service
* pkt-line matches our request.
*/
struct strbuf exp = STRBUF_INIT;
if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
die("%s has invalid packet header", refs_url);
if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
strbuf_setlen(&buffer, buffer.len - 1);
strbuf_addf(&exp, "# service=%s", service);
if (strbuf_cmp(&exp, &buffer))
die("invalid server response; got '%s'", buffer.buf);
strbuf_release(&exp);
/* The header can include additional metadata lines, up
* until a packet flush marker. Ignore these now, but
* in the future we might start to scan them.
*/
strbuf_reset(&buffer);
while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
strbuf_reset(&buffer);
last->proto_git = 1;
}
free(refs_url);
strbuf_release(&buffer);
last_discovery = last;
return last;
}
static struct discovery *discover_refs(const char *service, int for_push)
{
struct strbuf exp = STRBUF_INIT;
struct strbuf type = STRBUF_INIT;
struct strbuf charset = STRBUF_INIT;
struct strbuf buffer = STRBUF_INIT;
struct strbuf refs_url = STRBUF_INIT;
struct strbuf effective_url = STRBUF_INIT;
struct discovery *last = last_discovery;
int http_ret, maybe_smart = 0;
struct http_get_options options;
if (last && !strcmp(service, last->service))
return last;
free_discovery(last);
strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
git_env_bool("GIT_SMART_HTTP", 1)) {
maybe_smart = 1;
if (!strchr(url.buf, '?'))
strbuf_addch(&refs_url, '?');
else
strbuf_addch(&refs_url, '&');
strbuf_addf(&refs_url, "service=%s", service);
}
memset(&options, 0, sizeof(options));
options.content_type = &type;
options.charset = &charset;
options.effective_url = &effective_url;
options.base_url = &url;
options.no_cache = 1;
options.keep_error = 1;
http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
switch (http_ret) {
case HTTP_OK:
break;
case HTTP_MISSING_TARGET:
show_http_message(&type, &charset, &buffer);
die("repository '%s' not found", url.buf);
case HTTP_NOAUTH:
show_http_message(&type, &charset, &buffer);
die("Authentication failed for '%s'", url.buf);
default:
show_http_message(&type, &charset, &buffer);
die("unable to access '%s': %s", url.buf, curl_errorstr);
}
last= xcalloc(1, sizeof(*last_discovery));
last->service = service;
last->buf_alloc = strbuf_detach(&buffer, &last->len);
last->buf = last->buf_alloc;
strbuf_addf(&exp, "application/x-%s-advertisement", service);
if (maybe_smart &&
(5 <= last->len && last->buf[4] == '#') &&
!strbuf_cmp(&exp, &type)) {
char *line;
/*
* smart HTTP response; validate that the service
* pkt-line matches our request.
*/
line = packet_read_line_buf(&last->buf, &last->len, NULL);
strbuf_reset(&exp);
strbuf_addf(&exp, "# service=%s", service);
if (strcmp(line, exp.buf))
die("invalid server response; got '%s'", line);
strbuf_release(&exp);
/* The header can include additional metadata lines, up
* until a packet flush marker. Ignore these now, but
* in the future we might start to scan them.
*/
while (packet_read_line_buf(&last->buf, &last->len, NULL))
;
last->proto_git = 1;
}
if (last->proto_git)
last->refs = parse_git_refs(last, for_push);
else
last->refs = parse_info_refs(last);
strbuf_release(&refs_url);
strbuf_release(&exp);
strbuf_release(&type);
strbuf_release(&charset);
strbuf_release(&effective_url);
strbuf_release(&buffer);
last_discovery = last;
return last;
}
static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
{
struct strbuf buffer = STRBUF_INIT;
char *data, *start, *mid;
char *ref_name;
char *refs_url;
int i = 0;
int http_ret;
struct ref *refs = NULL;
struct ref *ref = NULL;
struct ref *last_ref = NULL;
struct walker *walker;
if (for_push)
return NULL;
if (!transport->data)
transport->data = get_http_walker(transport->url,
transport->remote);
walker = transport->data;
refs_url = xmalloc(strlen(transport->url) + 11);
sprintf(refs_url, "%s/info/refs", transport->url);
http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
switch (http_ret) {
case HTTP_OK:
break;
case HTTP_MISSING_TARGET:
die("%s not found: did you run git update-server-info on the"
" server?", refs_url);
default:
http_error(refs_url, http_ret);
die("HTTP request failed");
}
data = buffer.buf;
start = NULL;
mid = data;
while (i < buffer.len) {
if (!start)
start = &data[i];
if (data[i] == '\t')
mid = &data[i];
if (data[i] == '\n') {
data[i] = 0;
ref_name = mid + 1;
ref = xmalloc(sizeof(struct ref) +
strlen(ref_name) + 1);
memset(ref, 0, sizeof(struct ref));
strcpy(ref->name, ref_name);
get_sha1_hex(start, ref->old_sha1);
if (!refs)
refs = ref;
if (last_ref)
last_ref->next = ref;
last_ref = ref;
start = NULL;
}
i++;
}
strbuf_release(&buffer);
ref = alloc_ref("HEAD");
if (!walker->fetch_ref(walker, ref) &&
!resolve_remote_symref(ref, refs)) {
ref->next = refs;
refs = ref;
} else {
free(ref);
}
strbuf_release(&buffer);
free(refs_url);
return refs;
}
static struct discovery *discover_refs(const char *service, int for_push)
{
struct strbuf exp = STRBUF_INIT;
struct strbuf type = STRBUF_INIT;
struct strbuf charset = STRBUF_INIT;
struct strbuf buffer = STRBUF_INIT;
struct strbuf refs_url = STRBUF_INIT;
struct strbuf effective_url = STRBUF_INIT;
struct strbuf protocol_header = STRBUF_INIT;
struct string_list extra_headers = STRING_LIST_INIT_DUP;
struct discovery *last = last_discovery;
int http_ret, maybe_smart = 0;
struct http_get_options http_options;
enum protocol_version version = get_protocol_version_config();
if (last && !strcmp(service, last->service))
return last;
free_discovery(last);
strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
git_env_bool("GIT_SMART_HTTP", 1)) {
maybe_smart = 1;
if (!strchr(url.buf, '?'))
strbuf_addch(&refs_url, '?');
else
strbuf_addch(&refs_url, '&');
strbuf_addf(&refs_url, "service=%s", service);
}
/*
* NEEDSWORK: If we are trying to use protocol v2 and we are planning
* to perform a push, then fallback to v0 since the client doesn't know
* how to push yet using v2.
*/
if (version == protocol_v2 && !strcmp("git-receive-pack", service))
version = protocol_v0;
/* Add the extra Git-Protocol header */
if (get_protocol_http_header(version, &protocol_header))
string_list_append(&extra_headers, protocol_header.buf);
memset(&http_options, 0, sizeof(http_options));
http_options.content_type = &type;
http_options.charset = &charset;
http_options.effective_url = &effective_url;
http_options.base_url = &url;
http_options.extra_headers = &extra_headers;
http_options.initial_request = 1;
http_options.no_cache = 1;
http_options.keep_error = 1;
http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
switch (http_ret) {
case HTTP_OK:
break;
case HTTP_MISSING_TARGET:
show_http_message(&type, &charset, &buffer);
die("repository '%s' not found", url.buf);
case HTTP_NOAUTH:
show_http_message(&type, &charset, &buffer);
die("Authentication failed for '%s'", url.buf);
default:
show_http_message(&type, &charset, &buffer);
die("unable to access '%s': %s", url.buf, curl_errorstr);
}
if (options.verbosity && !starts_with(refs_url.buf, url.buf))
warning(_("redirecting to %s"), url.buf);
last= xcalloc(1, sizeof(*last_discovery));
last->service = xstrdup(service);
last->buf_alloc = strbuf_detach(&buffer, &last->len);
last->buf = last->buf_alloc;
strbuf_addf(&exp, "application/x-%s-advertisement", service);
if (maybe_smart &&
(5 <= last->len && last->buf[4] == '#') &&
!strbuf_cmp(&exp, &type)) {
char *line;
/*
* smart HTTP response; validate that the service
* pkt-line matches our request.
*/
line = packet_read_line_buf(&last->buf, &last->len, NULL);
if (!line)
die("invalid server response; expected service, got flush packet");
strbuf_reset(&exp);
strbuf_addf(&exp, "# service=%s", service);
if (strcmp(line, exp.buf))
die("invalid server response; got '%s'", line);
strbuf_release(&exp);
/* The header can include additional metadata lines, up
* until a packet flush marker. Ignore these now, but
* in the future we might start to scan them.
*/
while (packet_read_line_buf(&last->buf, &last->len, NULL))
;
last->proto_git = 1;
} else if (maybe_smart &&
last->len > 5 && starts_with(last->buf + 4, "version 2")) {
last->proto_git = 1;
}
if (last->proto_git)
last->refs = parse_git_refs(last, for_push);
else
last->refs = parse_info_refs(last);
strbuf_release(&refs_url);
strbuf_release(&exp);
strbuf_release(&type);
strbuf_release(&charset);
strbuf_release(&effective_url);
strbuf_release(&buffer);
strbuf_release(&protocol_header);
string_list_clear(&extra_headers, 0);
last_discovery = last;
return last;
}
