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http-push.c
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http-push.c
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#define USE_THE_REPOSITORY_VARIABLE
#include "git-compat-util.h"
#include "environment.h"
#include "hex.h"
#include "repository.h"
#include "commit.h"
#include "tag.h"
#include "blob.h"
#include "http.h"
#include "diff.h"
#include "revision.h"
#include "remote.h"
#include "list-objects.h"
#include "setup.h"
#include "sigchain.h"
#include "strvec.h"
#include "tree.h"
#include "tree-walk.h"
#include "url.h"
#include "packfile.h"
#include "object-store-ll.h"
#include "commit-reach.h"
#ifdef EXPAT_NEEDS_XMLPARSE_H
#include <xmlparse.h>
#else
#include <expat.h>
#endif
static const char http_push_usage[] =
"git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
#ifndef XML_STATUS_OK
enum XML_Status {
XML_STATUS_OK = 1,
XML_STATUS_ERROR = 0
};
#define XML_STATUS_OK 1
#define XML_STATUS_ERROR 0
#endif
#define PREV_BUF_SIZE 4096
/* DAV methods */
#define DAV_LOCK "LOCK"
#define DAV_MKCOL "MKCOL"
#define DAV_MOVE "MOVE"
#define DAV_PROPFIND "PROPFIND"
#define DAV_PUT "PUT"
#define DAV_UNLOCK "UNLOCK"
#define DAV_DELETE "DELETE"
/* DAV lock flags */
#define DAV_PROP_LOCKWR (1u << 0)
#define DAV_PROP_LOCKEX (1u << 1)
#define DAV_LOCK_OK (1u << 2)
/* DAV XML properties */
#define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
#define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
#define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
#define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
#define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
#define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
#define DAV_PROPFIND_RESP ".multistatus.response"
#define DAV_PROPFIND_NAME ".multistatus.response.href"
#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
/* DAV request body templates */
#define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
#define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
#define LOCK_TIME 600
#define LOCK_REFRESH 30
/* Remember to update object flag allocation in object.h */
#define LOCAL (1u<<11)
#define REMOTE (1u<<12)
#define FETCHING (1u<<13)
#define PUSHING (1u<<14)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
static int pushing;
static int aborted;
static signed char remote_dir_exists[256];
static int push_verbosely;
static int push_all = MATCH_REFS_NONE;
static int force_all;
static int dry_run;
static int helper_status;
static struct object_list *objects;
struct repo {
char *url;
char *path;
int path_len;
int has_info_refs;
int can_update_info_refs;
int has_info_packs;
struct packed_git *packs;
struct remote_lock *locks;
};
static struct repo *repo;
enum transfer_state {
NEED_FETCH,
RUN_FETCH_LOOSE,
RUN_FETCH_PACKED,
NEED_PUSH,
RUN_MKCOL,
RUN_PUT,
RUN_MOVE,
ABORTED,
COMPLETE
};
struct transfer_request {
struct object *obj;
struct packed_git *target;
char *url;
char *dest;
struct remote_lock *lock;
struct curl_slist *headers;
struct buffer buffer;
enum transfer_state state;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
void *userData;
struct active_request_slot *slot;
struct transfer_request *next;
};
static struct transfer_request *request_queue_head;
struct xml_ctx {
char *name;
int len;
char *cdata;
void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
void *userData;
};
struct remote_lock {
char *url;
char *owner;
char *token;
char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
time_t start_time;
long timeout;
int refreshing;
struct remote_lock *next;
};
/* Flags that control remote_ls processing */
#define PROCESS_FILES (1u << 0)
#define PROCESS_DIRS (1u << 1)
#define RECURSIVE (1u << 2)
/* Flags that remote_ls passes to callback functions */
#define IS_DIR (1u << 0)
struct remote_ls_ctx {
char *path;
void (*userFunc)(struct remote_ls_ctx *ls);
void *userData;
int flags;
char *dentry_name;
int dentry_flags;
struct remote_ls_ctx *parent;
};
/* get_dav_token_headers options */
enum dav_header_flag {
DAV_HEADER_IF = (1u << 0),
DAV_HEADER_LOCK = (1u << 1),
DAV_HEADER_TIMEOUT = (1u << 2)
};
static char *xml_entities(const char *s)
{
struct strbuf buf = STRBUF_INIT;
strbuf_addstr_xml_quoted(&buf, s);
return strbuf_detach(&buf, NULL);
}
static void curl_setup_http_get(CURL *curl, const char *url,
const char *custom_req)
{
curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
}
static void curl_setup_http(CURL *curl, const char *url,
const char *custom_req, struct buffer *buffer,
curl_write_callback write_fn)
{
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
}
static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
{
struct strbuf buf = STRBUF_INIT;
struct curl_slist *dav_headers = http_copy_default_headers();
if (options & DAV_HEADER_IF) {
strbuf_addf(&buf, "If: (<%s>)", lock->token);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
if (options & DAV_HEADER_LOCK) {
strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
if (options & DAV_HEADER_TIMEOUT) {
strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
strbuf_release(&buf);
return dav_headers;
}
static void finish_request(struct transfer_request *request);
static void release_request(struct transfer_request *request);
static void process_response(void *callback_data)
{
struct transfer_request *request =
(struct transfer_request *)callback_data;
finish_request(request);
}
static void start_fetch_loose(struct transfer_request *request)
{
struct active_request_slot *slot;
struct http_object_request *obj_req;
obj_req = new_http_object_request(repo->url, &request->obj->oid);
if (!obj_req) {
request->state = ABORTED;
return;
}
slot = obj_req->slot;
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
request->userData = obj_req;
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_LOOSE;
if (!start_active_slot(slot)) {
fprintf(stderr, "Unable to start GET request\n");
repo->can_update_info_refs = 0;
release_http_object_request(obj_req);
release_request(request);
}
}
static void start_mkcol(struct transfer_request *request)
{
char *hex = oid_to_hex(&request->obj->oid);
struct active_request_slot *slot;
request->url = get_remote_object_url(repo->url, hex, 1);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MKCOL;
} else {
request->state = ABORTED;
FREE_AND_NULL(request->url);
}
}
static void start_fetch_packed(struct transfer_request *request)
{
struct packed_git *target;
struct transfer_request *check_request = request_queue_head;
struct http_pack_request *preq;
target = find_sha1_pack(request->obj->oid.hash, repo->packs);
if (!target) {
fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
repo->can_update_info_refs = 0;
release_request(request);
return;
}
close_pack_index(target);
request->target = target;
fprintf(stderr, "Fetching pack %s\n",
hash_to_hex(target->hash));
fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
preq = new_http_pack_request(target->hash, repo->url);
if (!preq) {
repo->can_update_info_refs = 0;
return;
}
/* Make sure there isn't another open request for this pack */
while (check_request) {
if (check_request->state == RUN_FETCH_PACKED &&
!strcmp(check_request->url, preq->url)) {
release_http_pack_request(preq);
release_request(request);
return;
}
check_request = check_request->next;
}
preq->slot->callback_func = process_response;
preq->slot->callback_data = request;
request->slot = preq->slot;
request->userData = preq;
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_PACKED;
if (!start_active_slot(preq->slot)) {
fprintf(stderr, "Unable to start GET request\n");
release_http_pack_request(preq);
repo->can_update_info_refs = 0;
release_request(request);
}
}
static void start_put(struct transfer_request *request)
{
char *hex = oid_to_hex(&request->obj->oid);
struct active_request_slot *slot;
struct strbuf buf = STRBUF_INIT;
enum object_type type;
char hdr[50];
void *unpacked;
unsigned long len;
int hdrlen;
ssize_t size;
git_zstream stream;
unpacked = repo_read_object_file(the_repository, &request->obj->oid,
&type, &len);
hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
/* Set it up */
git_deflate_init(&stream, zlib_compression_level);
size = git_deflate_bound(&stream, len + hdrlen);
strbuf_init(&request->buffer.buf, size);
request->buffer.posn = 0;
/* Compress it */
stream.next_out = (unsigned char *)request->buffer.buf.buf;
stream.avail_out = size;
/* First header.. */
stream.next_in = (void *)hdr;
stream.avail_in = hdrlen;
while (git_deflate(&stream, 0) == Z_OK)
; /* nothing */
/* Then the data itself.. */
stream.next_in = unpacked;
stream.avail_in = len;
while (git_deflate(&stream, Z_FINISH) == Z_OK)
; /* nothing */
git_deflate_end(&stream);
free(unpacked);
request->buffer.buf.len = stream.total_out;
strbuf_addstr(&buf, "Destination: ");
append_remote_object_url(&buf, repo->url, hex, 0);
request->dest = strbuf_detach(&buf, NULL);
append_remote_object_url(&buf, repo->url, hex, 0);
strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
request->url = strbuf_detach(&buf, NULL);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http(slot->curl, request->url, DAV_PUT,
&request->buffer, fwrite_null);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_PUT;
} else {
request->state = ABORTED;
FREE_AND_NULL(request->url);
}
}
static void start_move(struct transfer_request *request)
{
struct active_request_slot *slot;
struct curl_slist *dav_headers = http_copy_default_headers();
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
dav_headers = curl_slist_append(dav_headers, request->dest);
dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MOVE;
} else {
request->state = ABORTED;
FREE_AND_NULL(request->url);
}
}
static int refresh_lock(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
struct curl_slist *dav_headers;
int rc = 0;
lock->refreshing = 1;
dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
fprintf(stderr, "LOCK HTTP error %ld\n",
results.http_code);
} else {
lock->start_time = time(NULL);
rc = 1;
}
}
lock->refreshing = 0;
curl_slist_free_all(dav_headers);
return rc;
}
static void check_locks(void)
{
struct remote_lock *lock = repo->locks;
time_t current_time = time(NULL);
int time_remaining;
while (lock) {
time_remaining = lock->start_time + lock->timeout -
current_time;
if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
if (!refresh_lock(lock)) {
fprintf(stderr,
"Unable to refresh lock for %s\n",
lock->url);
aborted = 1;
return;
}
}
lock = lock->next;
}
}
static void release_request(struct transfer_request *request)
{
struct transfer_request *entry = request_queue_head;
if (request == request_queue_head) {
request_queue_head = request->next;
} else {
while (entry && entry->next != request)
entry = entry->next;
if (entry)
entry->next = request->next;
}
free(request->url);
free(request);
}
static void finish_request(struct transfer_request *request)
{
struct http_pack_request *preq;
struct http_object_request *obj_req;
request->curl_result = request->slot->curl_result;
request->http_code = request->slot->http_code;
request->slot = NULL;
/* Keep locks active */
check_locks();
if (request->headers)
curl_slist_free_all(request->headers);
/* URL is reused for MOVE after PUT and used during FETCH */
if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
FREE_AND_NULL(request->url);
}
if (request->state == RUN_MKCOL) {
if (request->curl_result == CURLE_OK ||
request->http_code == 405) {
remote_dir_exists[request->obj->oid.hash[0]] = 1;
start_put(request);
} else {
fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
oid_to_hex(&request->obj->oid),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_PUT) {
if (request->curl_result == CURLE_OK) {
start_move(request);
} else {
fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
oid_to_hex(&request->obj->oid),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_MOVE) {
if (request->curl_result == CURLE_OK) {
if (push_verbosely)
fprintf(stderr, " sent %s\n",
oid_to_hex(&request->obj->oid));
request->obj->flags |= REMOTE;
release_request(request);
} else {
fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
oid_to_hex(&request->obj->oid),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_FETCH_LOOSE) {
obj_req = (struct http_object_request *)request->userData;
if (finish_http_object_request(obj_req) == 0)
if (obj_req->rename == 0)
request->obj->flags |= (LOCAL | REMOTE);
/* Try fetching packed if necessary */
if (request->obj->flags & LOCAL) {
release_http_object_request(obj_req);
release_request(request);
} else
start_fetch_packed(request);
} else if (request->state == RUN_FETCH_PACKED) {
int fail = 1;
if (request->curl_result != CURLE_OK) {
fprintf(stderr, "Unable to get pack file %s\n%s",
request->url, curl_errorstr);
} else {
preq = (struct http_pack_request *)request->userData;
if (preq) {
if (finish_http_pack_request(preq) == 0)
fail = 0;
release_http_pack_request(preq);
}
}
if (fail)
repo->can_update_info_refs = 0;
else
http_install_packfile(request->target, &repo->packs);
release_request(request);
}
}
static int is_running_queue;
static int fill_active_slot(void *data UNUSED)
{
struct transfer_request *request;
if (aborted || !is_running_queue)
return 0;
for (request = request_queue_head; request; request = request->next) {
if (request->state == NEED_FETCH) {
start_fetch_loose(request);
return 1;
} else if (pushing && request->state == NEED_PUSH) {
if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
start_put(request);
} else {
start_mkcol(request);
}
return 1;
}
}
return 0;
}
static void get_remote_object_list(unsigned char parent);
static void add_fetch_request(struct object *obj)
{
struct transfer_request *request;
check_locks();
/*
* Don't fetch the object if it's known to exist locally
* or is already in the request queue
*/
if (remote_dir_exists[obj->oid.hash[0]] == -1)
get_remote_object_list(obj->oid.hash[0]);
if (obj->flags & (LOCAL | FETCHING))
return;
obj->flags |= FETCHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = NULL;
request->headers = NULL;
request->state = NEED_FETCH;
request->next = request_queue_head;
request_queue_head = request;
fill_active_slots();
step_active_slots();
}
static int add_send_request(struct object *obj, struct remote_lock *lock)
{
struct transfer_request *request;
struct packed_git *target;
/* Keep locks active */
check_locks();
/*
* Don't push the object if it's known to exist on the remote
* or is already in the request queue
*/
if (remote_dir_exists[obj->oid.hash[0]] == -1)
get_remote_object_list(obj->oid.hash[0]);
if (obj->flags & (REMOTE | PUSHING))
return 0;
target = find_sha1_pack(obj->oid.hash, repo->packs);
if (target) {
obj->flags |= REMOTE;
return 0;
}
obj->flags |= PUSHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = lock;
request->headers = NULL;
request->state = NEED_PUSH;
request->next = request_queue_head;
request_queue_head = request;
fill_active_slots();
step_active_slots();
return 1;
}
static int fetch_indices(void)
{
int ret;
if (push_verbosely)
fprintf(stderr, "Getting pack list\n");
switch (http_get_info_packs(repo->url, &repo->packs)) {
case HTTP_OK:
case HTTP_MISSING_TARGET:
ret = 0;
break;
default:
ret = -1;
}
return ret;
}
static void one_remote_object(const struct object_id *oid)
{
struct object *obj;
obj = lookup_object(the_repository, oid);
if (!obj)
obj = parse_object(the_repository, oid);
/* Ignore remote objects that don't exist locally */
if (!obj)
return;
obj->flags |= REMOTE;
if (!object_list_contains(objects, obj))
object_list_insert(obj, &objects);
}
static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
{
int *lock_flags = (int *)ctx->userData;
if (tag_closed) {
if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
if ((*lock_flags & DAV_PROP_LOCKEX) &&
(*lock_flags & DAV_PROP_LOCKWR)) {
*lock_flags |= DAV_LOCK_OK;
}
*lock_flags &= DAV_LOCK_OK;
} else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
*lock_flags |= DAV_PROP_LOCKWR;
} else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
*lock_flags |= DAV_PROP_LOCKEX;
}
}
}
static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
{
struct remote_lock *lock = (struct remote_lock *)ctx->userData;
git_hash_ctx hash_ctx;
unsigned char lock_token_hash[GIT_MAX_RAWSZ];
if (tag_closed && ctx->cdata) {
if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
lock->owner = xstrdup(ctx->cdata);
} else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
const char *arg;
if (skip_prefix(ctx->cdata, "Second-", &arg))
lock->timeout = strtol(arg, NULL, 10);
} else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
lock->token = xstrdup(ctx->cdata);
the_hash_algo->init_fn(&hash_ctx);
the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
lock->tmpfile_suffix[0] = '_';
memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
}
}
}
static void one_remote_ref(const char *refname);
static void
xml_start_tag(void *userData, const char *name, const char **atts UNUSED)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
const char *c = strchr(name, ':');
int old_namelen, new_len;
if (!c)
c = name;
else
c++;
old_namelen = strlen(ctx->name);
new_len = old_namelen + strlen(c) + 2;
if (new_len > ctx->len) {
ctx->name = xrealloc(ctx->name, new_len);
ctx->len = new_len;
}
xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
FREE_AND_NULL(ctx->cdata);
ctx->userFunc(ctx, 0);
}
static void
xml_end_tag(void *userData, const char *name)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
const char *c = strchr(name, ':');
char *ep;
ctx->userFunc(ctx, 1);
if (!c)
c = name;
else
c++;
ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
*ep = 0;
}
static void
xml_cdata(void *userData, const XML_Char *s, int len)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
free(ctx->cdata);
ctx->cdata = xmemdupz(s, len);
}
static struct remote_lock *lock_remote(const char *path, long timeout)
{
struct active_request_slot *slot;
struct slot_results results;
struct buffer out_buffer = { STRBUF_INIT, 0 };
struct strbuf in_buffer = STRBUF_INIT;
char *url;
char *ep;
char timeout_header[25];
struct remote_lock *lock = NULL;
struct curl_slist *dav_headers = http_copy_default_headers();
struct xml_ctx ctx;
char *escaped;
url = xstrfmt("%s%s", repo->url, path);
/* Make sure leading directories exist for the remote ref */
ep = strchr(url + strlen(repo->url) + 1, '/');
while (ep) {
char saved_character = ep[1];
ep[1] = '\0';
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, url, DAV_MKCOL);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK &&
results.http_code != 405) {
fprintf(stderr,
"Unable to create branch path %s\n",
url);
free(url);
return NULL;
}
} else {
fprintf(stderr, "Unable to start MKCOL request\n");
free(url);
return NULL;
}
ep[1] = saved_character;
ep = strchr(ep + 1, '/');
}
escaped = xml_entities(ident_default_email());
strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
free(escaped);
xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
dav_headers = curl_slist_append(dav_headers, timeout_header);
dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
CALLOC_ARRAY(lock, 1);
lock->timeout = -1;
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK) {
XML_Parser parser = XML_ParserCreate(NULL);
enum XML_Status result;
ctx.name = xcalloc(10, 1);
ctx.len = 0;
ctx.cdata = NULL;
ctx.userFunc = handle_new_lock_ctx;
ctx.userData = lock;
XML_SetUserData(parser, &ctx);
XML_SetElementHandler(parser, xml_start_tag,
xml_end_tag);
XML_SetCharacterDataHandler(parser, xml_cdata);
result = XML_Parse(parser, in_buffer.buf,
in_buffer.len, 1);
free(ctx.name);
if (result != XML_STATUS_OK) {
fprintf(stderr, "XML error: %s\n",
XML_ErrorString(
XML_GetErrorCode(parser)));
lock->timeout = -1;
}
XML_ParserFree(parser);
} else {
fprintf(stderr,
"error: curl result=%d, HTTP code=%ld\n",
results.curl_result, results.http_code);
}
} else {
fprintf(stderr, "Unable to start LOCK request\n");
}
curl_slist_free_all(dav_headers);
strbuf_release(&out_buffer.buf);
strbuf_release(&in_buffer);
if (lock->token == NULL || lock->timeout <= 0) {
free(lock->token);
free(lock->owner);
free(url);
FREE_AND_NULL(lock);
} else {
lock->url = url;
lock->start_time = time(NULL);
lock->next = repo->locks;
repo->locks = lock;
}
return lock;
}
static int unlock_remote(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
struct remote_lock *prev = repo->locks;
struct curl_slist *dav_headers;
int rc = 0;
dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK)
rc = 1;
else
fprintf(stderr, "UNLOCK HTTP error %ld\n",
results.http_code);
} else {
fprintf(stderr, "Unable to start UNLOCK request\n");
}
curl_slist_free_all(dav_headers);
if (repo->locks == lock) {
repo->locks = lock->next;
} else {
while (prev && prev->next != lock)
prev = prev->next;
if (prev)
prev->next = lock->next;
}
free(lock->owner);
free(lock->url);
free(lock->token);
free(lock);
return rc;
}
static void remove_locks(void)
{
struct remote_lock *lock = repo->locks;
fprintf(stderr, "Removing remote locks...\n");
while (lock) {