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http-push.c
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http-push.c
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#include "cache.h"
#include "commit.h"
#include "pack.h"
#include "fetch.h"
#include "tag.h"
#include "blob.h"
#include "http.h"
#include "refs.h"
#include "revision.h"
#include "exec_cmd.h"
#include <expat.h>
static const char http_push_usage[] =
"git-http-push [--all] [--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
#define RANGE_HEADER_SIZE 30
/* 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
/* bits #0-4 in revision.h */
#define LOCAL (1u << 5)
#define REMOTE (1u << 6)
#define FETCHING (1u << 7)
#define PUSHING (1u << 8)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
static int pushing = 0;
static int aborted = 0;
static signed char remote_dir_exists[256];
static struct curl_slist *no_pragma_header;
static struct curl_slist *default_headers;
static int push_verbosely = 0;
static int push_all = 0;
static int force_all = 0;
static struct object_list *objects = NULL;
struct repo
{
char *url;
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 *remote = NULL;
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;
char *url;
char *dest;
struct remote_lock *lock;
struct curl_slist *headers;
struct buffer buffer;
char filename[PATH_MAX];
char tmpfile[PATH_MAX];
int local_fileno;
FILE *local_stream;
enum transfer_state state;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
unsigned char real_sha1[20];
SHA_CTX c;
z_stream stream;
int zret;
int rename;
void *userData;
struct active_request_slot *slot;
struct transfer_request *next;
};
static struct transfer_request *request_queue_head = NULL;
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;
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;
};
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 size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
void *data)
{
unsigned char expn[4096];
size_t size = eltsize * nmemb;
int posn = 0;
struct transfer_request *request = (struct transfer_request *)data;
do {
ssize_t retval = write(request->local_fileno,
ptr + posn, size - posn);
if (retval < 0)
return posn;
posn += retval;
} while (posn < size);
request->stream.avail_in = size;
request->stream.next_in = ptr;
do {
request->stream.next_out = expn;
request->stream.avail_out = sizeof(expn);
request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
SHA1_Update(&request->c, expn,
sizeof(expn) - request->stream.avail_out);
} while (request->stream.avail_in && request->zret == Z_OK);
data_received++;
return size;
}
static void start_fetch_loose(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
char *filename;
char prevfile[PATH_MAX];
char *url;
char *posn;
int prevlocal;
unsigned char prev_buf[PREV_BUF_SIZE];
ssize_t prev_read = 0;
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
struct active_request_slot *slot;
filename = sha1_file_name(request->obj->sha1);
snprintf(request->filename, sizeof(request->filename), "%s", filename);
snprintf(request->tmpfile, sizeof(request->tmpfile),
"%s.temp", filename);
snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
unlink(prevfile);
rename(request->tmpfile, prevfile);
unlink(request->tmpfile);
if (request->local_fileno != -1)
error("fd leakage in start: %d", request->local_fileno);
request->local_fileno = open(request->tmpfile,
O_WRONLY | O_CREAT | O_EXCL, 0666);
/* This could have failed due to the "lazy directory creation";
* try to mkdir the last path component.
*/
if (request->local_fileno < 0 && errno == ENOENT) {
char *dir = strrchr(request->tmpfile, '/');
if (dir) {
*dir = 0;
mkdir(request->tmpfile, 0777);
*dir = '/';
}
request->local_fileno = open(request->tmpfile,
O_WRONLY | O_CREAT | O_EXCL, 0666);
}
if (request->local_fileno < 0) {
request->state = ABORTED;
error("Couldn't create temporary file %s for %s: %s",
request->tmpfile, request->filename, strerror(errno));
return;
}
memset(&request->stream, 0, sizeof(request->stream));
inflateInit(&request->stream);
SHA1_Init(&request->c);
url = xmalloc(strlen(remote->url) + 50);
request->url = xmalloc(strlen(remote->url) + 50);
strcpy(url, remote->url);
posn = url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
strcpy(request->url, url);
/* If a previous temp file is present, process what was already
fetched. */
prevlocal = open(prevfile, O_RDONLY);
if (prevlocal != -1) {
do {
prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
if (prev_read>0) {
if (fwrite_sha1_file(prev_buf,
1,
prev_read,
request) == prev_read) {
prev_posn += prev_read;
} else {
prev_read = -1;
}
}
} while (prev_read > 0);
close(prevlocal);
}
unlink(prevfile);
/* Reset inflate/SHA1 if there was an error reading the previous temp
file; also rewind to the beginning of the local file. */
if (prev_read == -1) {
memset(&request->stream, 0, sizeof(request->stream));
inflateInit(&request->stream);
SHA1_Init(&request->c);
if (prev_posn>0) {
prev_posn = 0;
lseek(request->local_fileno, SEEK_SET, 0);
ftruncate(request->local_fileno, 0);
}
}
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
/* If we have successfully processed data from a previous fetch
attempt, only fetch the data we don't already have. */
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of object %s at byte %ld\n",
hex, prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl,
CURLOPT_HTTPHEADER, range_header);
}
/* 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");
remote->can_update_info_refs = 0;
release_request(request);
}
}
static void start_fetch_packed(struct transfer_request *request)
{
char *url;
struct packed_git *target;
FILE *packfile;
char *filename;
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
struct transfer_request *check_request = request_queue_head;
struct active_request_slot *slot;
target = find_sha1_pack(request->obj->sha1, remote->packs);
if (!target) {
fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
remote->can_update_info_refs = 0;
release_request(request);
return;
}
fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
filename = sha1_pack_name(target->sha1);
snprintf(request->filename, sizeof(request->filename), "%s", filename);
snprintf(request->tmpfile, sizeof(request->tmpfile),
"%s.temp", filename);
url = xmalloc(strlen(remote->url) + 64);
sprintf(url, "%sobjects/pack/pack-%s.pack",
remote->url, sha1_to_hex(target->sha1));
/* 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, url)) {
free(url);
release_request(request);
return;
}
check_request = check_request->next;
}
packfile = fopen(request->tmpfile, "a");
if (!packfile) {
fprintf(stderr, "Unable to open local file %s for pack",
filename);
remote->can_update_info_refs = 0;
free(url);
return;
}
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
request->local_stream = packfile;
request->userData = target;
request->url = url;
curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
slot->local = packfile;
/* If there is data present from a previous transfer attempt,
resume where it left off */
prev_posn = ftell(packfile);
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of pack %s at byte %ld\n",
sha1_to_hex(target->sha1), prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
}
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_PACKED;
if (!start_active_slot(slot)) {
fprintf(stderr, "Unable to start GET request\n");
remote->can_update_info_refs = 0;
release_request(request);
}
}
static void start_mkcol(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
char *posn;
request->url = xmalloc(strlen(remote->url) + 13);
strcpy(request->url, remote->url);
posn = request->url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
strcpy(posn, "/");
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MKCOL;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static void start_put(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
char *posn;
char type[20];
char hdr[50];
void *unpacked;
unsigned long len;
int hdrlen;
ssize_t size;
z_stream stream;
unpacked = read_sha1_file(request->obj->sha1, type, &len);
hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
/* Set it up */
memset(&stream, 0, sizeof(stream));
deflateInit(&stream, Z_BEST_COMPRESSION);
size = deflateBound(&stream, len + hdrlen);
request->buffer.buffer = xmalloc(size);
/* Compress it */
stream.next_out = request->buffer.buffer;
stream.avail_out = size;
/* First header.. */
stream.next_in = (void *)hdr;
stream.avail_in = hdrlen;
while (deflate(&stream, 0) == Z_OK)
/* nothing */;
/* Then the data itself.. */
stream.next_in = unpacked;
stream.avail_in = len;
while (deflate(&stream, Z_FINISH) == Z_OK)
/* nothing */;
deflateEnd(&stream);
free(unpacked);
request->buffer.size = stream.total_out;
request->buffer.posn = 0;
request->url = xmalloc(strlen(remote->url) +
strlen(request->lock->token) + 51);
strcpy(request->url, remote->url);
posn = request->url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
request->dest = xmalloc(strlen(request->url) + 14);
sprintf(request->dest, "Destination: %s", request->url);
posn += 38;
*(posn++) = '.';
strcpy(posn, request->lock->token);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_PUT;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static void start_move(struct transfer_request *request)
{
struct active_request_slot *slot;
struct curl_slist *dav_headers = NULL;
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, 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);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MOVE;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static int refresh_lock(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
char *if_header;
char timeout_header[25];
struct curl_slist *dav_headers = NULL;
int rc = 0;
lock->refreshing = 1;
if_header = xmalloc(strlen(lock->token) + 25);
sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
dav_headers = curl_slist_append(dav_headers, if_header);
dav_headers = curl_slist_append(dav_headers, timeout_header);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, 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);
free(if_header);
return rc;
}
static void check_locks(void)
{
struct remote_lock *lock = remote->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->next != NULL && entry->next != request)
entry = entry->next;
if (entry->next == request)
entry->next = entry->next->next;
}
if (request->local_fileno != -1)
close(request->local_fileno);
if (request->local_stream)
fclose(request->local_stream);
if (request->url != NULL)
free(request->url);
free(request);
}
static void finish_request(struct transfer_request *request)
{
struct stat st;
struct packed_git *target;
struct packed_git **lst;
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 != NULL)
curl_slist_free_all(request->headers);
/* URL is reused for MOVE after PUT */
if (request->state != RUN_PUT) {
free(request->url);
request->url = NULL;
}
if (request->state == RUN_MKCOL) {
if (request->curl_result == CURLE_OK ||
request->http_code == 405) {
remote_dir_exists[request->obj->sha1[0]] = 1;
start_put(request);
} else {
fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
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",
sha1_to_hex(request->obj->sha1),
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",
sha1_to_hex(request->obj->sha1));
request->obj->flags |= REMOTE;
release_request(request);
} else {
fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_FETCH_LOOSE) {
fchmod(request->local_fileno, 0444);
close(request->local_fileno); request->local_fileno = -1;
if (request->curl_result != CURLE_OK &&
request->http_code != 416) {
if (stat(request->tmpfile, &st) == 0) {
if (st.st_size == 0)
unlink(request->tmpfile);
}
} else {
if (request->http_code == 416)
fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
inflateEnd(&request->stream);
SHA1_Final(request->real_sha1, &request->c);
if (request->zret != Z_STREAM_END) {
unlink(request->tmpfile);
} else if (memcmp(request->obj->sha1, request->real_sha1, 20)) {
unlink(request->tmpfile);
} else {
request->rename =
move_temp_to_file(
request->tmpfile,
request->filename);
if (request->rename == 0) {
request->obj->flags |= (LOCAL | REMOTE);
}
}
}
/* Try fetching packed if necessary */
if (request->obj->flags & LOCAL)
release_request(request);
else
start_fetch_packed(request);
} else if (request->state == RUN_FETCH_PACKED) {
if (request->curl_result != CURLE_OK) {
fprintf(stderr, "Unable to get pack file %s\n%s",
request->url, curl_errorstr);
remote->can_update_info_refs = 0;
} else {
fclose(request->local_stream);
request->local_stream = NULL;
if (!move_temp_to_file(request->tmpfile,
request->filename)) {
target = (struct packed_git *)request->userData;
lst = &remote->packs;
while (*lst != target)
lst = &((*lst)->next);
*lst = (*lst)->next;
if (!verify_pack(target, 0))
install_packed_git(target);
else
remote->can_update_info_refs = 0;
}
}
release_request(request);
}
}
void fill_active_slots(void)
{
struct transfer_request *request = request_queue_head;
struct transfer_request *next;
struct active_request_slot *slot = active_queue_head;
int num_transfers;
if (aborted)
return;
while (active_requests < max_requests && request != NULL) {
next = request->next;
if (request->state == NEED_FETCH) {
start_fetch_loose(request);
} else if (pushing && request->state == NEED_PUSH) {
if (remote_dir_exists[request->obj->sha1[0]] == 1) {
start_put(request);
} else {
start_mkcol(request);
}
curl_multi_perform(curlm, &num_transfers);
}
request = next;
}
while (slot != NULL) {
if (!slot->in_use && slot->curl != NULL) {
curl_easy_cleanup(slot->curl);
slot->curl = NULL;
}
slot = slot->next;
}
}
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->sha1[0]] == -1)
get_remote_object_list(obj->sha1[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->local_fileno = -1;
request->local_stream = 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 = request_queue_head;
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->sha1[0]] == -1)
get_remote_object_list(obj->sha1[0]);
if (obj->flags & (REMOTE | PUSHING))
return 0;
target = find_sha1_pack(obj->sha1, remote->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->local_fileno = -1;
request->local_stream = 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_index(unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
char *filename;
char *url;
char tmpfile[PATH_MAX];
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
FILE *indexfile;
struct active_request_slot *slot;
struct slot_results results;
/* Don't use the index if the pack isn't there */
url = xmalloc(strlen(remote->url) + 64);
sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
free(url);
return error("Unable to verify pack %s is available",
hex);
}
} else {
return error("Unable to start request");
}
if (has_pack_index(sha1))
return 0;
if (push_verbosely)
fprintf(stderr, "Getting index for pack %s\n", hex);
sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
filename = sha1_pack_index_name(sha1);
snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
indexfile = fopen(tmpfile, "a");
if (!indexfile)
return error("Unable to open local file %s for pack index",
filename);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
slot->local = indexfile;
/* If there is data present from a previous transfer attempt,
resume where it left off */
prev_posn = ftell(indexfile);
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of index for pack %s at byte %ld\n",
hex, prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
}
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
free(url);
fclose(indexfile);
return error("Unable to get pack index %s\n%s", url,
curl_errorstr);
}
} else {
free(url);
fclose(indexfile);
return error("Unable to start request");
}
free(url);
fclose(indexfile);
return move_temp_to_file(tmpfile, filename);
}
static int setup_index(unsigned char *sha1)
{
struct packed_git *new_pack;
if (fetch_index(sha1))
return -1;
new_pack = parse_pack_index(sha1);
new_pack->next = remote->packs;
remote->packs = new_pack;
return 0;
}
static int fetch_indices(void)