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Only compile parallel HTTP support with CURL >= 7.9.8
Only compile parallel HTTP support with CURL >= 7.9.8 Signed-off-by: Nick Hengeveld <nickh@reactrix.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Nick Hengeveld
Junio C Hamano
parent
1d389ab65d
commit
a7a8d3786e
62
http-fetch.c
62
http-fetch.c
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@ -6,7 +6,10 @@
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#include <curl/curl.h>
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#include <curl/easy.h>
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#if LIBCURL_VERSION_NUM >= 0x070908
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#define USE_CURL_MULTI
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#define DEFAULT_MAX_REQUESTS 5
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#endif
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#if LIBCURL_VERSION_NUM < 0x070704
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#define curl_global_cleanup() do { /* nothing */ } while(0)
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@ -18,11 +21,13 @@
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#define PREV_BUF_SIZE 4096
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#define RANGE_HEADER_SIZE 30
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static int max_requests = DEFAULT_MAX_REQUESTS;
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static int active_requests = 0;
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static int data_received;
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#ifdef USE_CURL_MULTI
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static int max_requests = DEFAULT_MAX_REQUESTS;
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static CURLM *curlm;
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#endif
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static CURL *curl_default;
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static struct curl_slist *no_pragma_header;
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static struct curl_slist *no_range_header;
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@ -151,13 +156,17 @@ int relink_or_rename(char *old, char *new) {
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return 0;
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}
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#ifdef USE_CURL_MULTI
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void process_curl_messages();
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void process_request_queue();
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#endif
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struct active_request_slot *get_active_slot()
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{
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struct active_request_slot *slot = active_queue_head;
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struct active_request_slot *newslot;
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#ifdef USE_CURL_MULTI
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int num_transfers;
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/* Wait for a slot to open up if the queue is full */
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@ -167,6 +176,7 @@ struct active_request_slot *get_active_slot()
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process_curl_messages();
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}
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}
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#endif
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while (slot != NULL && slot->in_use) {
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slot = slot->next;
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@ -202,6 +212,7 @@ struct active_request_slot *get_active_slot()
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int start_active_slot(struct active_request_slot *slot)
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{
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#ifdef USE_CURL_MULTI
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CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
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if (curlm_result != CURLM_OK &&
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@ -210,12 +221,13 @@ int start_active_slot(struct active_request_slot *slot)
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slot->in_use = 0;
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return 0;
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}
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#endif
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return 1;
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}
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void run_active_slot(struct active_request_slot *slot)
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{
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#ifdef USE_CURL_MULTI
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int num_transfers;
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long last_pos = 0;
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long current_pos;
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@ -255,6 +267,10 @@ void run_active_slot(struct active_request_slot *slot)
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&excfds, &select_timeout);
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}
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}
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#else
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slot->curl_result = curl_easy_perform(slot->curl);
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active_requests--;
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#endif
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}
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void start_request(struct transfer_request *request)
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@ -356,7 +372,7 @@ void start_request(struct transfer_request *request)
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CURLOPT_HTTPHEADER, range_header);
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}
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/* Try to add to multi handle, abort the request on error */
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/* Try to get the request started, abort the request on error */
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if (!start_active_slot(slot)) {
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request->state = ABORTED;
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close(request->local);
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@ -413,6 +429,7 @@ void release_request(struct transfer_request *request)
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free(request);
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}
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#ifdef USE_CURL_MULTI
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void process_curl_messages()
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{
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int num_messages;
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@ -478,6 +495,7 @@ void process_request_queue()
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request = request->next;
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}
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}
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#endif
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void prefetch(unsigned char *sha1)
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{
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@ -505,8 +523,10 @@ void prefetch(unsigned char *sha1)
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}
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tail->next = newreq;
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}
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#ifdef USE_CURL_MULTI
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process_request_queue();
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process_curl_messages();
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#endif
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}
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static int got_alternates = 0;
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@ -864,13 +884,14 @@ static int fetch_object(struct alt_base *repo, unsigned char *sha1)
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char *hex = sha1_to_hex(sha1);
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int ret;
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struct transfer_request *request = request_queue_head;
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int num_transfers;
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while (request != NULL && memcmp(request->sha1, sha1, 20))
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request = request->next;
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if (request == NULL)
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return error("Couldn't find request for %s in the queue", hex);
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#ifdef USE_CURL_MULTI
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int num_transfers;
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while (request->state == WAITING) {
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curl_multi_perform(curlm, &num_transfers);
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if (num_transfers < active_requests) {
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@ -878,9 +899,30 @@ static int fetch_object(struct alt_base *repo, unsigned char *sha1)
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process_request_queue();
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}
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}
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#else
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start_request(request);
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#endif
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if (request->state == ACTIVE)
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while (request->state == ACTIVE) {
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run_active_slot(request->slot);
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#ifndef USE_CURL_MULTI
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request->curl_result = request->slot->curl_result;
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curl_easy_getinfo(request->slot->curl,
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CURLINFO_HTTP_CODE,
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&request->http_code);
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request->slot = NULL;
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/* Use alternates if necessary */
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if (request->http_code == 404 &&
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request->repo->next != NULL) {
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request->repo = request->repo->next;
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start_request(request);
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} else {
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finish_request(request);
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request->state = COMPLETE;
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}
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#endif
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}
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if (request->state == ABORTED) {
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release_request(request);
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@ -992,16 +1034,22 @@ int main(int argc, char **argv)
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arg++;
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} else if (!strcmp(argv[arg], "--recover")) {
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get_recover = 1;
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#ifdef USE_CURL_MULTI
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} else if (argv[arg][1] == 'r') {
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max_requests = atoi(argv[arg + 1]);
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if (max_requests < 1)
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max_requests = DEFAULT_MAX_REQUESTS;
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arg++;
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#endif
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}
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arg++;
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}
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if (argc < arg + 2) {
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#ifdef USE_CURL_MULTI
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usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [-r concurrent-request-limit] [--recover] [-w ref] commit-id url");
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#else
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usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
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#endif
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return 1;
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}
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commit_id = argv[arg];
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@ -1009,11 +1057,13 @@ int main(int argc, char **argv)
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curl_global_init(CURL_GLOBAL_ALL);
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#ifdef USE_CURL_MULTI
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curlm = curl_multi_init();
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if (curlm == NULL) {
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fprintf(stderr, "Error creating curl multi handle.\n");
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return 1;
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}
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#endif
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no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
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no_range_header = curl_slist_append(no_range_header, "Range:");
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@ -1061,7 +1111,9 @@ int main(int argc, char **argv)
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curl_easy_cleanup(slot->curl);
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slot = slot->next;
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}
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#ifdef USE_CURL_MULTI
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curl_multi_cleanup(curlm);
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#endif
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curl_global_cleanup();
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return 0;
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}
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