#include "cache.h"
+#include "config.h"
#include "remote.h"
+#include "connect.h"
#include "strbuf.h"
#include "walker.h"
#include "http.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "pkt-line.h"
#include "string-list.h"
#include "credential.h"
#include "sha1-array.h"
#include "send-pack.h"
+#include "protocol.h"
+#include "quote.h"
static struct remote *remote;
/* always ends with a trailing slash */
struct options {
int verbosity;
unsigned long depth;
+ char *deepen_since;
+ struct string_list deepen_not;
+ struct string_list push_options;
+ char *filter;
unsigned progress : 1,
check_self_contained_and_connected : 1,
cloning : 1,
dry_run : 1,
thin : 1,
/* One of the SEND_PACK_PUSH_CERT_* constants. */
- push_cert : 2;
+ push_cert : 2,
+ deepen_relative : 1,
+ from_promisor : 1,
+ no_dependents : 1;
};
static struct options options;
static struct string_list cas_options = STRING_LIST_INIT_DUP;
options.depth = v;
return 0;
}
+ else if (!strcmp(name, "deepen-since")) {
+ options.deepen_since = xstrdup(value);
+ return 0;
+ }
+ else if (!strcmp(name, "deepen-not")) {
+ string_list_append(&options.deepen_not, value);
+ return 0;
+ }
+ else if (!strcmp(name, "deepen-relative")) {
+ if (!strcmp(value, "true"))
+ options.deepen_relative = 1;
+ else if (!strcmp(value, "false"))
+ options.deepen_relative = 0;
+ else
+ return -1;
+ return 0;
+ }
else if (!strcmp(name, "followtags")) {
if (!strcmp(value, "true"))
options.followtags = 1;
else
return -1;
return 0;
+ } else if (!strcmp(name, "push-option")) {
+ if (*value != '"')
+ string_list_append(&options.push_options, value);
+ else {
+ struct strbuf unquoted = STRBUF_INIT;
+ if (unquote_c_style(&unquoted, value, NULL) < 0)
+ die("invalid quoting in push-option value");
+ string_list_append_nodup(&options.push_options,
+ strbuf_detach(&unquoted, NULL));
+ }
+ return 0;
#if LIBCURL_VERSION_NUM >= 0x070a08
} else if (!strcmp(name, "family")) {
return -1;
return 0;
#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
+ } else if (!strcmp(name, "from-promisor")) {
+ options.from_promisor = 1;
+ return 0;
+ } else if (!strcmp(name, "no-dependents")) {
+ options.no_dependents = 1;
+ return 0;
+ } else if (!strcmp(name, "filter")) {
+ options.filter = xstrdup(value);
+ return 0;
} else {
return 1 /* unsupported */;
}
}
struct discovery {
- const char *service;
+ char *service;
char *buf_alloc;
char *buf;
size_t len;
struct ref *refs;
- struct sha1_array shallow;
+ struct oid_array shallow;
+ enum protocol_version version;
unsigned proto_git : 1;
};
static struct discovery *last_discovery;
static struct ref *parse_git_refs(struct discovery *heads, int for_push)
{
struct ref *list = NULL;
- get_remote_heads(-1, heads->buf, heads->len, &list,
- for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
+ struct packet_reader reader;
+
+ packet_reader_init(&reader, -1, heads->buf, heads->len,
+ PACKET_READ_CHOMP_NEWLINE |
+ PACKET_READ_GENTLE_ON_EOF);
+
+ heads->version = discover_version(&reader);
+ switch (heads->version) {
+ case protocol_v2:
+ /*
+ * Do nothing. This isn't a list of refs but rather a
+ * capability advertisement. Client would have run
+ * 'stateless-connect' so we'll dump this capability listing
+ * and let them request the refs themselves.
+ */
+ break;
+ case protocol_v1:
+ case protocol_v0:
+ get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
+ NULL, &heads->shallow);
+ break;
+ case protocol_unknown_version:
+ BUG("unknown protocol version");
+ }
+
return list;
}
if (d) {
if (d == last_discovery)
last_discovery = NULL;
- free(d->shallow.sha1);
+ free(d->shallow.oid);
free(d->buf_alloc);
free_refs(d->refs);
+ free(d->service);
free(d);
}
}
return 0;
}
+static int get_protocol_http_header(enum protocol_version version,
+ struct strbuf *header)
+{
+ if (version > 0) {
+ strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
+ version);
+
+ return 1;
+ }
+
+ return 0;
+}
+
static struct discovery *discover_refs(const char *service, int for_push)
{
struct strbuf exp = 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 options;
+ struct http_get_options http_options;
+ enum protocol_version version = get_protocol_version_config();
if (last && !strcmp(service, last->service))
return last;
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);
+ /*
+ * 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;
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 = service;
+ last->service = xstrdup(service);
last->buf_alloc = strbuf_detach(&buffer, &last->len);
last->buf = last->buf_alloc;
* 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);
;
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)
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;
}
char *service_url;
char *hdr_content_type;
char *hdr_accept;
+ char *protocol_header;
char *buf;
size_t alloc;
size_t len;
size_t pos;
int in;
int out;
+ int any_written;
struct strbuf result;
unsigned gzip_request : 1;
unsigned initial_buffer : 1;
{
size_t size = eltsize * nmemb;
struct rpc_state *rpc = buffer_;
+ if (size)
+ rpc->any_written = 1;
write_or_die(rpc->in, ptr, size);
return size;
}
return err;
}
+static curl_off_t xcurl_off_t(ssize_t len) {
+ if (len > maximum_signed_value_of_type(curl_off_t))
+ die("cannot handle pushes this big");
+ return (curl_off_t) len;
+}
+
static int post_rpc(struct rpc_state *rpc)
{
struct active_request_slot *slot;
headers = curl_slist_append(headers, needs_100_continue ?
"Expect: 100-continue" : "Expect:");
+ /* Add the extra Git-Protocol header */
+ if (rpc->protocol_header)
+ headers = curl_slist_append(headers, rpc->protocol_header);
+
retry:
slot = get_active_slot();
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
- curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
+ curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
if (large_request) {
/* The request body is large and the size cannot be predicted.
* and we just need to send it.
*/
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
- curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
+ curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
} else if (use_gzip && 1024 < rpc->len) {
/* The client backend isn't giving us compressed data so
headers = curl_slist_append(headers, "Content-Encoding: gzip");
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
- curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
+ curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
if (options.verbosity > 1) {
fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
* more normal Content-Length approach.
*/
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
- curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
+ curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
if (options.verbosity > 1) {
fprintf(stderr, "POST %s (%lu bytes)\n",
rpc->service_name, (unsigned long)rpc->len);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
+
+ rpc->any_written = 0;
err = run_slot(slot, NULL);
if (err == HTTP_REAUTH && !large_request) {
credential_fill(&http_auth);
if (err != HTTP_OK)
err = -1;
+ if (!rpc->any_written)
+ err = -1;
+
curl_slist_free_all(headers);
free(gzip_body);
return err;
strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
rpc->hdr_accept = strbuf_detach(&buf, NULL);
+ if (get_protocol_http_header(heads->version, &buf))
+ rpc->protocol_header = strbuf_detach(&buf, NULL);
+ else
+ rpc->protocol_header = NULL;
+
while (!err) {
int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
if (!n)
free(rpc->service_url);
free(rpc->hdr_content_type);
free(rpc->hdr_accept);
+ free(rpc->protocol_header);
free(rpc->buf);
strbuf_release(&buf);
return err;
int ret, i;
ALLOC_ARRAY(targets, nr_heads);
- if (options.depth)
- die("dumb http transport does not support --depth");
+ if (options.depth || options.deepen_since)
+ die("dumb http transport does not support shallow capabilities");
for (i = 0; i < nr_heads; i++)
targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
walker = get_http_walker(url.buf);
- walker->get_all = 1;
- walker->get_tree = 1;
- walker->get_history = 1;
walker->get_verbosely = options.verbosity >= 3;
walker->get_recover = 0;
ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
{
struct rpc_state rpc;
struct strbuf preamble = STRBUF_INIT;
- char *depth_arg = NULL;
- int argc = 0, i, err;
- const char *argv[17];
-
- argv[argc++] = "fetch-pack";
- argv[argc++] = "--stateless-rpc";
- argv[argc++] = "--stdin";
- argv[argc++] = "--lock-pack";
+ int i, err;
+ struct argv_array args = ARGV_ARRAY_INIT;
+
+ argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
+ "--stdin", "--lock-pack", NULL);
if (options.followtags)
- argv[argc++] = "--include-tag";
+ argv_array_push(&args, "--include-tag");
if (options.thin)
- argv[argc++] = "--thin";
- if (options.verbosity >= 3) {
- argv[argc++] = "-v";
- argv[argc++] = "-v";
- }
+ argv_array_push(&args, "--thin");
+ if (options.verbosity >= 3)
+ argv_array_pushl(&args, "-v", "-v", NULL);
if (options.check_self_contained_and_connected)
- argv[argc++] = "--check-self-contained-and-connected";
+ argv_array_push(&args, "--check-self-contained-and-connected");
if (options.cloning)
- argv[argc++] = "--cloning";
+ argv_array_push(&args, "--cloning");
if (options.update_shallow)
- argv[argc++] = "--update-shallow";
+ argv_array_push(&args, "--update-shallow");
if (!options.progress)
- argv[argc++] = "--no-progress";
- if (options.depth) {
- struct strbuf buf = STRBUF_INIT;
- strbuf_addf(&buf, "--depth=%lu", options.depth);
- depth_arg = strbuf_detach(&buf, NULL);
- argv[argc++] = depth_arg;
- }
- argv[argc++] = url.buf;
- argv[argc++] = NULL;
+ argv_array_push(&args, "--no-progress");
+ if (options.depth)
+ argv_array_pushf(&args, "--depth=%lu", options.depth);
+ if (options.deepen_since)
+ argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
+ for (i = 0; i < options.deepen_not.nr; i++)
+ argv_array_pushf(&args, "--shallow-exclude=%s",
+ options.deepen_not.items[i].string);
+ if (options.deepen_relative && options.depth)
+ argv_array_push(&args, "--deepen-relative");
+ if (options.from_promisor)
+ argv_array_push(&args, "--from-promisor");
+ if (options.no_dependents)
+ argv_array_push(&args, "--no-dependents");
+ if (options.filter)
+ argv_array_pushf(&args, "--filter=%s", options.filter);
+ argv_array_push(&args, url.buf);
for (i = 0; i < nr_heads; i++) {
struct ref *ref = to_fetch[i];
memset(&rpc, 0, sizeof(rpc));
rpc.service_name = "git-upload-pack",
- rpc.argv = argv;
+ rpc.argv = args.argv;
rpc.stdin_preamble = &preamble;
rpc.gzip_request = 1;
write_or_die(1, rpc.result.buf, rpc.result.len);
strbuf_release(&rpc.result);
strbuf_release(&preamble);
- free(depth_arg);
+ argv_array_clear(&args);
return err;
}
argv_array_push(&args, "--quiet");
else if (options.verbosity > 1)
argv_array_push(&args, "--verbose");
+ for (i = 0; i < options.push_options.nr; i++)
+ argv_array_pushf(&args, "--push-option=%s",
+ options.push_options.items[i].string);
argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
for_each_string_list_item(cas_option, &cas_options)
argv_array_push(&args, cas_option->string);
free(specs);
}
+/*
+ * Used to represent the state of a connection to an HTTP server when
+ * communicating using git's wire-protocol version 2.
+ */
+struct proxy_state {
+ char *service_name;
+ char *service_url;
+ struct curl_slist *headers;
+ struct strbuf request_buffer;
+ int in;
+ int out;
+ struct packet_reader reader;
+ size_t pos;
+ int seen_flush;
+};
+
+static void proxy_state_init(struct proxy_state *p, const char *service_name,
+ enum protocol_version version)
+{
+ struct strbuf buf = STRBUF_INIT;
+
+ memset(p, 0, sizeof(*p));
+ p->service_name = xstrdup(service_name);
+
+ p->in = 0;
+ p->out = 1;
+ strbuf_init(&p->request_buffer, 0);
+
+ strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
+ p->service_url = strbuf_detach(&buf, NULL);
+
+ p->headers = http_copy_default_headers();
+
+ strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
+ p->headers = curl_slist_append(p->headers, buf.buf);
+ strbuf_reset(&buf);
+
+ strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
+ p->headers = curl_slist_append(p->headers, buf.buf);
+ strbuf_reset(&buf);
+
+ p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
+
+ /* Add the Git-Protocol header */
+ if (get_protocol_http_header(version, &buf))
+ p->headers = curl_slist_append(p->headers, buf.buf);
+
+ packet_reader_init(&p->reader, p->in, NULL, 0,
+ PACKET_READ_GENTLE_ON_EOF);
+
+ strbuf_release(&buf);
+}
+
+static void proxy_state_clear(struct proxy_state *p)
+{
+ free(p->service_name);
+ free(p->service_url);
+ curl_slist_free_all(p->headers);
+ strbuf_release(&p->request_buffer);
+}
+
+/*
+ * CURLOPT_READFUNCTION callback function.
+ * Attempts to copy over a single packet-line at a time into the
+ * curl provided buffer.
+ */
+static size_t proxy_in(char *buffer, size_t eltsize,
+ size_t nmemb, void *userdata)
+{
+ size_t max;
+ struct proxy_state *p = userdata;
+ size_t avail = p->request_buffer.len - p->pos;
+
+
+ if (eltsize != 1)
+ BUG("curl read callback called with size = %"PRIuMAX" != 1",
+ (uintmax_t)eltsize);
+ max = nmemb;
+
+ if (!avail) {
+ if (p->seen_flush) {
+ p->seen_flush = 0;
+ return 0;
+ }
+
+ strbuf_reset(&p->request_buffer);
+ switch (packet_reader_read(&p->reader)) {
+ case PACKET_READ_EOF:
+ die("unexpected EOF when reading from parent process");
+ case PACKET_READ_NORMAL:
+ packet_buf_write_len(&p->request_buffer, p->reader.line,
+ p->reader.pktlen);
+ break;
+ case PACKET_READ_DELIM:
+ packet_buf_delim(&p->request_buffer);
+ break;
+ case PACKET_READ_FLUSH:
+ packet_buf_flush(&p->request_buffer);
+ p->seen_flush = 1;
+ break;
+ }
+ p->pos = 0;
+ avail = p->request_buffer.len;
+ }
+
+ if (max < avail)
+ avail = max;
+ memcpy(buffer, p->request_buffer.buf + p->pos, avail);
+ p->pos += avail;
+ return avail;
+}
+
+static size_t proxy_out(char *buffer, size_t eltsize,
+ size_t nmemb, void *userdata)
+{
+ size_t size;
+ struct proxy_state *p = userdata;
+
+ if (eltsize != 1)
+ BUG("curl read callback called with size = %"PRIuMAX" != 1",
+ (uintmax_t)eltsize);
+ size = nmemb;
+
+ write_or_die(p->out, buffer, size);
+ return size;
+}
+
+/* Issues a request to the HTTP server configured in `p` */
+static int proxy_request(struct proxy_state *p)
+{
+ struct active_request_slot *slot;
+
+ slot = get_active_slot();
+
+ curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
+ curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
+ curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
+ curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
+ curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
+
+ /* Setup function to read request from client */
+ curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
+ curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
+
+ /* Setup function to write server response to client */
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
+
+ if (run_slot(slot, NULL) != HTTP_OK)
+ return -1;
+
+ return 0;
+}
+
+static int stateless_connect(const char *service_name)
+{
+ struct discovery *discover;
+ struct proxy_state p;
+
+ /*
+ * Run the info/refs request and see if the server supports protocol
+ * v2. If and only if the server supports v2 can we successfully
+ * establish a stateless connection, otherwise we need to tell the
+ * client to fallback to using other transport helper functions to
+ * complete their request.
+ */
+ discover = discover_refs(service_name, 0);
+ if (discover->version != protocol_v2) {
+ printf("fallback\n");
+ fflush(stdout);
+ return -1;
+ } else {
+ /* Stateless Connection established */
+ printf("\n");
+ fflush(stdout);
+ }
+
+ proxy_state_init(&p, service_name, discover->version);
+
+ /*
+ * Dump the capability listing that we got from the server earlier
+ * during the info/refs request.
+ */
+ write_or_die(p.out, discover->buf, discover->len);
+
+ /* Peek the next packet line. Until we see EOF keep sending POSTs */
+ while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
+ if (proxy_request(&p)) {
+ /* We would have an err here */
+ break;
+ }
+ }
+
+ proxy_state_clear(&p);
+ return 0;
+}
+
int cmd_main(int argc, const char **argv)
{
struct strbuf buf = STRBUF_INIT;
options.verbosity = 1;
options.progress = !!isatty(2);
options.thin = 1;
+ string_list_init(&options.deepen_not, 1);
+ string_list_init(&options.push_options, 1);
remote = remote_get(argv[1]);
fflush(stdout);
} else if (!strcmp(buf.buf, "capabilities")) {
+ printf("stateless-connect\n");
printf("fetch\n");
printf("option\n");
printf("push\n");
printf("check-connectivity\n");
printf("\n");
fflush(stdout);
+ } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
+ if (!stateless_connect(arg))
+ break;
} else {
error("remote-curl: unknown command '%s' from git", buf.buf);
return 1;