#define PREV_BUF_SIZE 4096
#define RANGE_HEADER_SIZE 30
+static int got_alternates = -1;
static int active_requests = 0;
static int data_received;
int in_use;
int done;
CURLcode curl_result;
+ long http_code;
+ void *callback_data;
+ void (*callback_func)(void *data);
struct active_request_slot *next;
};
+struct alt_request {
+ char *base;
+ char *url;
+ struct buffer *buffer;
+ struct active_request_slot *slot;
+ int http_specific;
+};
+
static struct transfer_request *request_queue_head = NULL;
static struct active_request_slot *active_queue_head = NULL;
static char *ssl_capath = NULL;
#endif
static char *ssl_cainfo = NULL;
+static long curl_low_speed_limit = -1;
+static long curl_low_speed_time = -1;
struct buffer
{
}
#endif
+ if (!strcmp("http.lowspeedlimit", var)) {
+ if (curl_low_speed_limit == -1)
+ curl_low_speed_limit = (long)git_config_int(var, value);
+ return 0;
+ }
+ if (!strcmp("http.lowspeedtime", var)) {
+ if (curl_low_speed_time == -1)
+ curl_low_speed_time = (long)git_config_int(var, value);
+ return 0;
+ }
+
/* Fall back on the default ones */
return git_default_config(var, value);
}
static void process_curl_messages(void);
static void process_request_queue(void);
#endif
+static void fetch_alternates(char *base);
static CURL* get_curl_handle(void)
{
curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
+ if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
+ curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
+ curl_low_speed_limit);
+ curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
+ curl_low_speed_time);
+ }
+
+ curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
+
return result;
}
}
if (slot == NULL) {
newslot = xmalloc(sizeof(*newslot));
-#ifdef NO_CURL_EASY_DUPHANDLE
- newslot->curl = get_curl_handle();
-#else
- newslot->curl = curl_easy_duphandle(curl_default);
-#endif
+ newslot->curl = NULL;
newslot->in_use = 0;
newslot->next = NULL;
slot = newslot;
}
+ if (slot->curl == NULL) {
+#ifdef NO_CURL_EASY_DUPHANDLE
+ slot->curl = get_curl_handle();
+#else
+ slot->curl = curl_easy_duphandle(curl_default);
+#endif
+ }
+
active_requests++;
slot->in_use = 1;
slot->done = 0;
slot->local = NULL;
+ slot->callback_data = NULL;
+ slot->callback_func = NULL;
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_range_header);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
rename(request->tmpfile, prevfile);
unlink(request->tmpfile);
+ if (request->local != -1)
+ error("fd leakage in start: %d", request->local);
request->local = open(request->tmpfile,
O_WRONLY | O_CREAT | O_EXCL, 0666);
/* This could have failed due to the "lazy directory creation";
/* Try to get the request started, abort the request on error */
if (!start_active_slot(slot)) {
request->state = ABORTED;
- close(request->local);
+ close(request->local); request->local = -1;
free(request->url);
return;
}
static void finish_request(struct transfer_request *request)
{
+ struct stat st;
+
fchmod(request->local, 0444);
- close(request->local);
+ close(request->local); request->local = -1;
if (request->http_code == 416) {
fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
} else if (request->curl_result != CURLE_OK) {
+ if (stat(request->tmpfile, &st) == 0)
+ if (st.st_size == 0)
+ unlink(request->tmpfile);
return;
}
{
struct transfer_request *entry = request_queue_head;
+ if (request->local != -1)
+ error("fd leakage in release: %d", request->local);
if (request == request_queue_head) {
request_queue_head = request->next;
} else {
}
#ifdef USE_CURL_MULTI
-void process_curl_messages(void)
+static void process_curl_messages(void)
{
int num_messages;
struct active_request_slot *slot;
while (curl_message != NULL) {
if (curl_message->msg == CURLMSG_DONE) {
+ int curl_result = curl_message->data.result;
slot = active_queue_head;
while (slot != NULL &&
slot->curl != curl_message->easy_handle)
active_requests--;
slot->done = 1;
slot->in_use = 0;
- slot->curl_result = curl_message->data.result;
+ slot->curl_result = curl_result;
+ curl_easy_getinfo(slot->curl,
+ CURLINFO_HTTP_CODE,
+ &slot->http_code);
request = request_queue_head;
while (request != NULL &&
request->slot != slot)
} else {
fprintf(stderr, "Received DONE message for unknown request!\n");
}
+
+ /* Process slot callback if appropriate */
+ if (slot->callback_func != NULL) {
+ slot->callback_func(slot->callback_data);
+ }
+
if (request != NULL) {
- request->curl_result =
- curl_message->data.result;
- curl_easy_getinfo(slot->curl,
- CURLINFO_HTTP_CODE,
- &request->http_code);
+ request->curl_result = curl_result;
+ request->http_code = slot->http_code;
request->slot = NULL;
+ request->state = COMPLETE;
/* Use alternates if necessary */
- if (request->http_code == 404 &&
- request->repo->next != NULL) {
- request->repo = request->repo->next;
- start_request(request);
+ if (request->http_code == 404) {
+ fetch_alternates(alt->base);
+ if (request->repo->next != NULL) {
+ request->repo =
+ request->repo->next;
+ close(request->local);
+ request->local = -1;
+ start_request(request);
+ } else {
+ finish_request(request);
+ }
} else {
finish_request(request);
- request->state = COMPLETE;
}
}
} else {
}
}
-void process_request_queue(void)
+static void process_request_queue(void)
{
struct transfer_request *request = request_queue_head;
+ struct active_request_slot *slot = active_queue_head;
int num_transfers;
while (active_requests < max_requests && request != NULL) {
}
request = request->next;
}
+
+ while (slot != NULL) {
+ if (!slot->in_use && slot->curl != NULL) {
+ curl_easy_cleanup(slot->curl);
+ slot->curl = NULL;
+ }
+ slot = slot->next;
+ }
}
#endif
curl_errorstr);
}
} else {
+ fclose(indexfile);
return error("Unable to start request");
}
return 0;
}
-static int fetch_alternates(char *base)
+static void process_alternates(void *callback_data)
{
- int ret = 0;
- struct buffer buffer;
- char *url;
- char *data;
- int i = 0;
- int http_specific = 1;
+ struct alt_request *alt_req = (struct alt_request *)callback_data;
+ struct active_request_slot *slot = alt_req->slot;
struct alt_base *tail = alt;
+ char *base = alt_req->base;
static const char null_byte = '\0';
+ char *data;
+ int i = 0;
- struct active_request_slot *slot;
-
- data = xmalloc(4096);
- buffer.size = 4096;
- buffer.posn = 0;
- buffer.buffer = data;
-
- if (get_verbosely)
- fprintf(stderr, "Getting alternates list\n");
-
- url = xmalloc(strlen(base) + 31);
- sprintf(url, "%s/objects/info/http-alternates", base);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
- fwrite_buffer_dynamic);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK || !buffer.posn) {
- http_specific = 0;
-
- sprintf(url, "%s/objects/info/alternates", base);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
- fwrite_buffer_dynamic);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
+ if (alt_req->http_specific) {
+ if (slot->curl_result != CURLE_OK ||
+ !alt_req->buffer->posn) {
+
+ /* Try reusing the slot to get non-http alternates */
+ alt_req->http_specific = 0;
+ sprintf(alt_req->url, "%s/objects/info/alternates",
+ base);
+ curl_easy_setopt(slot->curl, CURLOPT_URL,
+ alt_req->url);
+ active_requests++;
+ slot->in_use = 1;
+ slot->done = 0;
if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK) {
- free(buffer.buffer);
- return 0;
- }
+ return;
+ } else {
+ got_alternates = -1;
+ slot->done = 1;
+ return;
}
}
- } else {
- free(buffer.buffer);
- return 0;
+ } else if (slot->curl_result != CURLE_OK) {
+ if (slot->http_code != 404) {
+ got_alternates = -1;
+ return;
+ }
}
- fwrite_buffer_dynamic(&null_byte, 1, 1, &buffer);
- buffer.posn--;
- data = buffer.buffer;
+ fwrite_buffer_dynamic(&null_byte, 1, 1, alt_req->buffer);
+ alt_req->buffer->posn--;
+ data = alt_req->buffer->buffer;
- while (i < buffer.posn) {
+ while (i < alt_req->buffer->posn) {
int posn = i;
- while (posn < buffer.posn && data[posn] != '\n')
+ while (posn < alt_req->buffer->posn && data[posn] != '\n')
posn++;
if (data[posn] == '\n') {
int okay = 0;
// If the server got removed, give up.
okay = strchr(base, ':') - base + 3 <
serverlen;
- } else if (http_specific) {
+ } else if (alt_req->http_specific) {
char *colon = strchr(data + i, ':');
char *slash = strchr(data + i, '/');
if (colon && slash && colon < data + posn &&
while (tail->next != NULL)
tail = tail->next;
tail->next = newalt;
- ret++;
}
}
i = posn + 1;
}
- free(buffer.buffer);
- return ret;
+ got_alternates = 1;
+}
+
+static void fetch_alternates(char *base)
+{
+ struct buffer buffer;
+ char *url;
+ char *data;
+ struct active_request_slot *slot;
+ static struct alt_request alt_req;
+ int num_transfers;
+
+ /* If another request has already started fetching alternates,
+ wait for them to arrive and return to processing this request's
+ curl message */
+ while (got_alternates == 0) {
+ curl_multi_perform(curlm, &num_transfers);
+ process_curl_messages();
+ process_request_queue();
+ }
+
+ /* Nothing to do if they've already been fetched */
+ if (got_alternates == 1)
+ return;
+
+ /* Start the fetch */
+ got_alternates = 0;
+
+ data = xmalloc(4096);
+ buffer.size = 4096;
+ buffer.posn = 0;
+ buffer.buffer = data;
+
+ if (get_verbosely)
+ fprintf(stderr, "Getting alternates list for %s\n", base);
+
+ url = xmalloc(strlen(base) + 31);
+ sprintf(url, "%s/objects/info/http-alternates", base);
+
+ /* Use a callback to process the result, since another request
+ may fail and need to have alternates loaded before continuing */
+ slot = get_active_slot();
+ slot->callback_func = process_alternates;
+ slot->callback_data = &alt_req;
+
+ curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
+ fwrite_buffer_dynamic);
+ curl_easy_setopt(slot->curl, CURLOPT_URL, url);
+
+ alt_req.base = base;
+ alt_req.url = url;
+ alt_req.buffer = &buffer;
+ alt_req.http_specific = 1;
+ alt_req.slot = slot;
+
+ if (start_active_slot(slot))
+ run_active_slot(slot);
+ else
+ got_alternates = -1;
+
+ free(data);
+ free(url);
}
static int fetch_indices(struct alt_base *repo)
buffer.buffer = data;
if (get_verbosely)
- fprintf(stderr, "Getting pack list\n");
+ fprintf(stderr, "Getting pack list for %s\n", repo->base);
url = xmalloc(strlen(repo->base) + 21);
sprintf(url, "%s/objects/info/packs", repo->base);
curl_errorstr);
}
} else {
+ fclose(packfile);
return error("Unable to start request");
}
run_active_slot(request->slot);
#ifndef USE_CURL_MULTI
request->curl_result = request->slot->curl_result;
- curl_easy_getinfo(request->slot->curl,
- CURLINFO_HTTP_CODE,
- &request->http_code);
+ request->http_code = request->slot->http_code;
request->slot = NULL;
/* Use alternates if necessary */
- if (request->http_code == 404 &&
- request->repo->next != NULL) {
- request->repo = request->repo->next;
- start_request(request);
+ if (request->http_code == 404) {
+ fetch_alternates(alt->base);
+ if (request->repo->next != NULL) {
+ request->repo = request->repo->next;
+ close(request->local); request->local = -1;
+ start_request(request);
+ }
} else {
finish_request(request);
request->state = COMPLETE;
}
#endif
}
+ if (request->local != -1) {
+ close(request->local); request->local = -1;
+ }
if (request->state == ABORTED) {
release_request(request);
}
if (request->curl_result != CURLE_OK && request->http_code != 416) {
- ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
- request->errorstr, request->curl_result,
- request->http_code, hex);
+ if (request->http_code == 404)
+ ret = -1; /* Be silent, it is probably in a pack. */
+ else
+ ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
+ request->errorstr, request->curl_result,
+ request->http_code, hex);
release_request(request);
return ret;
}
while (altbase) {
if (!fetch_pack(altbase, sha1))
return 0;
+ fetch_alternates(alt->base);
altbase = altbase->next;
}
return error("Unable to find %s under %s\n", sha1_to_hex(sha1),
char *url;
int arg = 1;
struct active_request_slot *slot;
+ char *low_speed_limit;
+ char *low_speed_time;
+ char *wait_url;
+ int rc = 0;
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't') {
#endif
ssl_cainfo = getenv("GIT_SSL_CAINFO");
+ low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
+ if (low_speed_limit != NULL)
+ curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
+ low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
+ if (low_speed_time != NULL)
+ curl_low_speed_time = strtol(low_speed_time, NULL, 10);
+
git_config(http_options);
if (curl_ssl_verify == -1)
alt->got_indices = 0;
alt->packs = NULL;
alt->next = NULL;
- fetch_alternates(alt->base);
if (pull(commit_id))
- return 1;
+ rc = 1;
curl_slist_free_all(pragma_header);
curl_slist_free_all(no_pragma_header);
#endif
slot = active_queue_head;
while (slot != NULL) {
- curl_easy_cleanup(slot->curl);
+ if (slot->in_use) {
+ if (get_verbosely) {
+ curl_easy_getinfo(slot->curl,
+ CURLINFO_EFFECTIVE_URL,
+ &wait_url);
+ fprintf(stderr, "Waiting for %s\n", wait_url);
+ }
+ run_active_slot(slot);
+ }
+ if (slot->curl != NULL)
+ curl_easy_cleanup(slot->curl);
slot = slot->next;
}
#ifdef USE_CURL_MULTI
curl_multi_cleanup(curlm);
#endif
curl_global_cleanup();
- return 0;
+ return rc;
}