[thirdparty/git.git] / http.c

#include "http.h"

int data_received;
int active_requests = 0;

#ifdef USE_CURL_MULTI
static int max_requests = -1;
static CURLM *curlm;
#endif
#ifndef NO_CURL_EASY_DUPHANDLE
static CURL *curl_default;
#endif
char curl_errorstr[CURL_ERROR_SIZE];

static int curl_ssl_verify = -1;
static const char *ssl_cert = NULL;
#if LIBCURL_VERSION_NUM >= 0x070902
static const char *ssl_key = NULL;
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
static const char *ssl_capath = NULL;
#endif
static const char *ssl_cainfo = NULL;
static long curl_low_speed_limit = -1;
static long curl_low_speed_time = -1;
static int curl_ftp_no_epsv = 0;
static const char *curl_http_proxy = NULL;

static struct curl_slist *pragma_header;

static struct active_request_slot *active_queue_head = NULL;

size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
{
	size_t size = eltsize * nmemb;
	struct buffer *buffer = buffer_;

	if (size > buffer->buf.len - buffer->posn)
		size = buffer->buf.len - buffer->posn;
	memcpy(ptr, buffer->buf.buf + buffer->posn, size);
	buffer->posn += size;

	return size;
}

size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
{
	size_t size = eltsize * nmemb;
	struct strbuf *buffer = buffer_;

	strbuf_add(buffer, ptr, size);
	data_received++;
	return size;
}

size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
{
	data_received++;
	return eltsize * nmemb;
}

static void finish_active_slot(struct active_request_slot *slot);

#ifdef USE_CURL_MULTI
static void process_curl_messages(void)
{
	int num_messages;
	struct active_request_slot *slot;
	CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);

	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)
				slot = slot->next;
			if (slot != NULL) {
				curl_multi_remove_handle(curlm, slot->curl);
				slot->curl_result = curl_result;
				finish_active_slot(slot);
			} else {
				fprintf(stderr, "Received DONE message for unknown request!\n");
			}
		} else {
			fprintf(stderr, "Unknown CURL message received: %d\n",
				(int)curl_message->msg);
		}
		curl_message = curl_multi_info_read(curlm, &num_messages);
	}
}
#endif

static int http_options(const char *var, const char *value, void *cb)
{
	if (!strcmp("http.sslverify", var)) {
		if (curl_ssl_verify == -1) {
			curl_ssl_verify = git_config_bool(var, value);
		}
		return 0;
	}

	if (!strcmp("http.sslcert", var)) {
		if (ssl_cert == NULL)
			return git_config_string(&ssl_cert, var, value);
		return 0;
	}
#if LIBCURL_VERSION_NUM >= 0x070902
	if (!strcmp("http.sslkey", var)) {
		if (ssl_key == NULL)
			return git_config_string(&ssl_key, var, value);
		return 0;
	}
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
	if (!strcmp("http.sslcapath", var)) {
		if (ssl_capath == NULL)
			return git_config_string(&ssl_capath, var, value);
		return 0;
	}
#endif
	if (!strcmp("http.sslcainfo", var)) {
		if (ssl_cainfo == NULL)
			return git_config_string(&ssl_cainfo, var, value);
		return 0;
	}

#ifdef USE_CURL_MULTI
	if (!strcmp("http.maxrequests", var)) {
		if (max_requests == -1)
			max_requests = git_config_int(var, value);
		return 0;
	}
#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;
	}

	if (!strcmp("http.noepsv", var)) {
		curl_ftp_no_epsv = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp("http.proxy", var)) {
		if (curl_http_proxy == NULL)
			return git_config_string(&curl_http_proxy, var, value);
		return 0;
	}

	/* Fall back on the default ones */
	return git_default_config(var, value, cb);
}

static CURL* get_curl_handle(void)
{
	CURL* result = curl_easy_init();

	if (!curl_ssl_verify) {
		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
	} else {
		/* Verify authenticity of the peer's certificate */
		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
		/* The name in the cert must match whom we tried to connect */
		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
	}

#if LIBCURL_VERSION_NUM >= 0x070907
	curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
#endif

	if (ssl_cert != NULL)
		curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
#if LIBCURL_VERSION_NUM >= 0x070902
	if (ssl_key != NULL)
		curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
	if (ssl_capath != NULL)
		curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
#endif
	if (ssl_cainfo != NULL)
		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);

	if (getenv("GIT_CURL_VERBOSE"))
		curl_easy_setopt(result, CURLOPT_VERBOSE, 1);

	curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);

	if (curl_ftp_no_epsv)
		curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);

	if (curl_http_proxy)
		curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);

	return result;
}

void http_init(struct remote *remote)
{
	char *low_speed_limit;
	char *low_speed_time;

	curl_global_init(CURL_GLOBAL_ALL);

	if (remote && remote->http_proxy)
		curl_http_proxy = xstrdup(remote->http_proxy);

	pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");

#ifdef USE_CURL_MULTI
	{
		char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
		if (http_max_requests != NULL)
			max_requests = atoi(http_max_requests);
	}

	curlm = curl_multi_init();
	if (curlm == NULL) {
		fprintf(stderr, "Error creating curl multi handle.\n");
		exit(1);
	}
#endif

	if (getenv("GIT_SSL_NO_VERIFY"))
		curl_ssl_verify = 0;

	ssl_cert = getenv("GIT_SSL_CERT");
#if LIBCURL_VERSION_NUM >= 0x070902
	ssl_key = getenv("GIT_SSL_KEY");
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
	ssl_capath = getenv("GIT_SSL_CAPATH");
#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, NULL);

	if (curl_ssl_verify == -1)
		curl_ssl_verify = 1;

#ifdef USE_CURL_MULTI
	if (max_requests < 1)
		max_requests = DEFAULT_MAX_REQUESTS;
#endif

	if (getenv("GIT_CURL_FTP_NO_EPSV"))
		curl_ftp_no_epsv = 1;

#ifndef NO_CURL_EASY_DUPHANDLE
	curl_default = get_curl_handle();
#endif
}

void http_cleanup(void)
{
	struct active_request_slot *slot = active_queue_head;

	while (slot != NULL) {
		struct active_request_slot *next = slot->next;
		if (slot->curl != NULL) {
#ifdef USE_CURL_MULTI
			curl_multi_remove_handle(curlm, slot->curl);
#endif
			curl_easy_cleanup(slot->curl);
		}
		free(slot);
		slot = next;
	}
	active_queue_head = NULL;

#ifndef NO_CURL_EASY_DUPHANDLE
	curl_easy_cleanup(curl_default);
#endif

#ifdef USE_CURL_MULTI
	curl_multi_cleanup(curlm);
#endif
	curl_global_cleanup();

	curl_slist_free_all(pragma_header);
	pragma_header = NULL;

	if (curl_http_proxy) {
		free((void *)curl_http_proxy);
		curl_http_proxy = NULL;
	}
}

struct active_request_slot *get_active_slot(void)
{
	struct active_request_slot *slot = active_queue_head;
	struct active_request_slot *newslot;

#ifdef USE_CURL_MULTI
	int num_transfers;

	/* Wait for a slot to open up if the queue is full */
	while (active_requests >= max_requests) {
		curl_multi_perform(curlm, &num_transfers);
		if (num_transfers < active_requests) {
			process_curl_messages();
		}
	}
#endif

	while (slot != NULL && slot->in_use) {
		slot = slot->next;
	}
	if (slot == NULL) {
		newslot = xmalloc(sizeof(*newslot));
		newslot->curl = NULL;
		newslot->in_use = 0;
		newslot->next = NULL;

		slot = active_queue_head;
		if (slot == NULL) {
			active_queue_head = newslot;
		} else {
			while (slot->next != NULL) {
				slot = slot->next;
			}
			slot->next = newslot;
		}
		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->local = NULL;
	slot->results = NULL;
	slot->finished = NULL;
	slot->callback_data = NULL;
	slot->callback_func = NULL;
	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
	curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
	curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
	curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
	curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);

	return slot;
}

int start_active_slot(struct active_request_slot *slot)
{
#ifdef USE_CURL_MULTI
	CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
	int num_transfers;

	if (curlm_result != CURLM_OK &&
	    curlm_result != CURLM_CALL_MULTI_PERFORM) {
		active_requests--;
		slot->in_use = 0;
		return 0;
	}

	/*
	 * We know there must be something to do, since we just added
	 * something.
	 */
	curl_multi_perform(curlm, &num_transfers);
#endif
	return 1;
}

#ifdef USE_CURL_MULTI
struct fill_chain {
	void *data;
	int (*fill)(void *);
	struct fill_chain *next;
};

static struct fill_chain *fill_cfg = NULL;

void add_fill_function(void *data, int (*fill)(void *))
{
	struct fill_chain *new = xmalloc(sizeof(*new));
	struct fill_chain **linkp = &fill_cfg;
	new->data = data;
	new->fill = fill;
	new->next = NULL;
	while (*linkp)
		linkp = &(*linkp)->next;
	*linkp = new;
}

void fill_active_slots(void)
{
	struct active_request_slot *slot = active_queue_head;

	while (active_requests < max_requests) {
		struct fill_chain *fill;
		for (fill = fill_cfg; fill; fill = fill->next)
			if (fill->fill(fill->data))
				break;

		if (!fill)
			break;
	}

	while (slot != NULL) {
		if (!slot->in_use && slot->curl != NULL) {
			curl_easy_cleanup(slot->curl);
			slot->curl = NULL;
		}
		slot = slot->next;
	}
}

void step_active_slots(void)
{
	int num_transfers;
	CURLMcode curlm_result;

	do {
		curlm_result = curl_multi_perform(curlm, &num_transfers);
	} while (curlm_result == CURLM_CALL_MULTI_PERFORM);
	if (num_transfers < active_requests) {
		process_curl_messages();
		fill_active_slots();
	}
}
#endif

void run_active_slot(struct active_request_slot *slot)
{
#ifdef USE_CURL_MULTI
	long last_pos = 0;
	long current_pos;
	fd_set readfds;
	fd_set writefds;
	fd_set excfds;
	int max_fd;
	struct timeval select_timeout;
	int finished = 0;

	slot->finished = &finished;
	while (!finished) {
		data_received = 0;
		step_active_slots();

		if (!data_received && slot->local != NULL) {
			current_pos = ftell(slot->local);
			if (current_pos > last_pos)
				data_received++;
			last_pos = current_pos;
		}

		if (slot->in_use && !data_received) {
			max_fd = 0;
			FD_ZERO(&readfds);
			FD_ZERO(&writefds);
			FD_ZERO(&excfds);
			select_timeout.tv_sec = 0;
			select_timeout.tv_usec = 50000;
			select(max_fd, &readfds, &writefds,
			       &excfds, &select_timeout);
		}
	}
#else
	while (slot->in_use) {
		slot->curl_result = curl_easy_perform(slot->curl);
		finish_active_slot(slot);
	}
#endif
}

static void closedown_active_slot(struct active_request_slot *slot)
{
	active_requests--;
	slot->in_use = 0;
}

void release_active_slot(struct active_request_slot *slot)
{
	closedown_active_slot(slot);
	if (slot->curl) {
#ifdef USE_CURL_MULTI
		curl_multi_remove_handle(curlm, slot->curl);
#endif
		curl_easy_cleanup(slot->curl);
		slot->curl = NULL;
	}
#ifdef USE_CURL_MULTI
	fill_active_slots();
#endif
}

static void finish_active_slot(struct active_request_slot *slot)
{
	closedown_active_slot(slot);
	curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);

	if (slot->finished != NULL)
		(*slot->finished) = 1;

	/* Store slot results so they can be read after the slot is reused */
	if (slot->results != NULL) {
		slot->results->curl_result = slot->curl_result;
		slot->results->http_code = slot->http_code;
	}

	/* Run callback if appropriate */
	if (slot->callback_func != NULL) {
		slot->callback_func(slot->callback_data);
	}
}

void finish_all_active_slots(void)
{
	struct active_request_slot *slot = active_queue_head;

	while (slot != NULL)
		if (slot->in_use) {
			run_active_slot(slot);
			slot = active_queue_head;
		} else {
			slot = slot->next;
		}
}

static inline int needs_quote(int ch)
{
	if (((ch >= 'A') && (ch <= 'Z'))
			|| ((ch >= 'a') && (ch <= 'z'))
			|| ((ch >= '0') && (ch <= '9'))
			|| (ch == '/')
			|| (ch == '-')
			|| (ch == '.'))
		return 0;
	return 1;
}

static inline int hex(int v)
{
	if (v < 10) return '0' + v;
	else return 'A' + v - 10;
}

static char *quote_ref_url(const char *base, const char *ref)
{
	struct strbuf buf = STRBUF_INIT;
	const char *cp;
	int ch;

	strbuf_addstr(&buf, base);
	if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
		strbuf_addstr(&buf, "/");

	for (cp = ref; (ch = *cp) != 0; cp++)
		if (needs_quote(ch))
			strbuf_addf(&buf, "%%%02x", ch);
		else
			strbuf_addch(&buf, *cp);

	return strbuf_detach(&buf, NULL);
}

int http_fetch_ref(const char *base, struct ref *ref)
{
	char *url;
	struct strbuf buffer = STRBUF_INIT;
	struct active_request_slot *slot;
	struct slot_results results;
	int ret;

	url = quote_ref_url(base, ref->name);
	slot = get_active_slot();
	slot->results = &results;
	curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
	curl_easy_setopt(slot->curl, CURLOPT_URL, url);
	if (start_active_slot(slot)) {
		run_active_slot(slot);
		if (results.curl_result == CURLE_OK) {
			strbuf_rtrim(&buffer);
			if (buffer.len == 40)
				ret = get_sha1_hex(buffer.buf, ref->old_sha1);
			else if (!prefixcmp(buffer.buf, "ref: ")) {
				ref->symref = xstrdup(buffer.buf + 5);
				ret = 0;
			} else
				ret = 1;
		} else {
			ret = error("Couldn't get %s for %s\n%s",
				    url, ref->name, curl_errorstr);
		}
	} else {
		ret = error("Unable to start request");
	}

	strbuf_release(&buffer);
	free(url);
	return ret;
}
Commit	Line	Data
29508e1e NH	1	#include "http.h"
	2
	3	int data_received;
	4	int active_requests = 0;
	5
	6	#ifdef USE_CURL_MULTI
cc3530e8 MH	7	static int max_requests = -1;
cc3530e8 MH	8	static CURLM *curlm;
29508e1e NH	9	#endif
29508e1e NH	10	#ifndef NO_CURL_EASY_DUPHANDLE
cc3530e8	11	static CURL *curl_default;
29508e1e NH	12	#endif
	13	char curl_errorstr[CURL_ERROR_SIZE];
	14
cc3530e8	15	static int curl_ssl_verify = -1;
7ef8ea70	16	static const char *ssl_cert = NULL;
29508e1e	17	#if LIBCURL_VERSION_NUM >= 0x070902
7ef8ea70	18	static const char *ssl_key = NULL;
29508e1e NH	19	#endif
29508e1e NH	20	#if LIBCURL_VERSION_NUM >= 0x070908
7ef8ea70	21	static const char *ssl_capath = NULL;
29508e1e	22	#endif
7ef8ea70	23	static const char *ssl_cainfo = NULL;
cc3530e8 MH	24	static long curl_low_speed_limit = -1;
	25	static long curl_low_speed_time = -1;
	26	static int curl_ftp_no_epsv = 0;
e4a80ecf	27	static const char *curl_http_proxy = NULL;
29508e1e	28
cc3530e8	29	static struct curl_slist *pragma_header;
29508e1e	30
cc3530e8	31	static struct active_request_slot *active_queue_head = NULL;
29508e1e	32
f444e528	33	size_t fread_buffer(void ptr, size_t eltsize, size_t nmemb, void buffer_)
29508e1e NH	34	{
29508e1e NH	35	size_t size = eltsize * nmemb;
f444e528 JH	36	struct buffer *buffer = buffer_;
f444e528 JH	37
028c2976 MH	38	if (size > buffer->buf.len - buffer->posn)
	39	size = buffer->buf.len - buffer->posn;
	40	memcpy(ptr, buffer->buf.buf + buffer->posn, size);
29508e1e	41	buffer->posn += size;
028c2976	42
29508e1e NH	43	return size;
	44	}
	45
f444e528	46	size_t fwrite_buffer(const void ptr, size_t eltsize, size_t nmemb, void buffer_)
29508e1e NH	47	{
29508e1e NH	48	size_t size = eltsize * nmemb;
f444e528 JH	49	struct strbuf *buffer = buffer_;
f444e528 JH	50
028c2976	51	strbuf_add(buffer, ptr, size);
29508e1e NH	52	data_received++;
	53	return size;
	54	}
	55
f444e528	56	size_t fwrite_null(const void ptr, size_t eltsize, size_t nmemb, void strbuf)
29508e1e NH	57	{
	58	data_received++;
	59	return eltsize * nmemb;
	60	}
	61
	62	static void finish_active_slot(struct active_request_slot *slot);
	63
	64	#ifdef USE_CURL_MULTI
	65	static void process_curl_messages(void)
	66	{
	67	int num_messages;
	68	struct active_request_slot *slot;
	69	CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
	70
	71	while (curl_message != NULL) {
	72	if (curl_message->msg == CURLMSG_DONE) {
	73	int curl_result = curl_message->data.result;
	74	slot = active_queue_head;
	75	while (slot != NULL &&
	76	slot->curl != curl_message->easy_handle)
	77	slot = slot->next;
	78	if (slot != NULL) {
	79	curl_multi_remove_handle(curlm, slot->curl);
	80	slot->curl_result = curl_result;
	81	finish_active_slot(slot);
	82	} else {
	83	fprintf(stderr, "Received DONE message for unknown request!\n");
	84	}
	85	} else {
	86	fprintf(stderr, "Unknown CURL message received: %d\n",
	87	(int)curl_message->msg);
	88	}
	89	curl_message = curl_multi_info_read(curlm, &num_messages);
	90	}
	91	}
	92	#endif
	93
ef90d6d4	94	static int http_options(const char var, const char value, void *cb)
29508e1e NH	95	{
	96	if (!strcmp("http.sslverify", var)) {
	97	if (curl_ssl_verify == -1) {
	98	curl_ssl_verify = git_config_bool(var, value);
	99	}
	100	return 0;
	101	}
	102
	103	if (!strcmp("http.sslcert", var)) {
7ef8ea70 BH	104	if (ssl_cert == NULL)
7ef8ea70 BH	105	return git_config_string(&ssl_cert, var, value);
29508e1e NH	106	return 0;
	107	}
	108	#if LIBCURL_VERSION_NUM >= 0x070902
	109	if (!strcmp("http.sslkey", var)) {
7ef8ea70 BH	110	if (ssl_key == NULL)
7ef8ea70 BH	111	return git_config_string(&ssl_key, var, value);
29508e1e NH	112	return 0;
	113	}
	114	#endif
	115	#if LIBCURL_VERSION_NUM >= 0x070908
	116	if (!strcmp("http.sslcapath", var)) {
7ef8ea70 BH	117	if (ssl_capath == NULL)
7ef8ea70 BH	118	return git_config_string(&ssl_capath, var, value);
29508e1e NH	119	return 0;
	120	}
	121	#endif
	122	if (!strcmp("http.sslcainfo", var)) {
7ef8ea70 BH	123	if (ssl_cainfo == NULL)
7ef8ea70 BH	124	return git_config_string(&ssl_cainfo, var, value);
29508e1e NH	125	return 0;
	126	}
	127
a6080a0a	128	#ifdef USE_CURL_MULTI
29508e1e NH	129	if (!strcmp("http.maxrequests", var)) {
	130	if (max_requests == -1)
	131	max_requests = git_config_int(var, value);
	132	return 0;
	133	}
	134	#endif
	135
	136	if (!strcmp("http.lowspeedlimit", var)) {
	137	if (curl_low_speed_limit == -1)
	138	curl_low_speed_limit = (long)git_config_int(var, value);
	139	return 0;
	140	}
	141	if (!strcmp("http.lowspeedtime", var)) {
	142	if (curl_low_speed_time == -1)
	143	curl_low_speed_time = (long)git_config_int(var, value);
	144	return 0;
	145	}
	146
3ea099d4 SK	147	if (!strcmp("http.noepsv", var)) {
	148	curl_ftp_no_epsv = git_config_bool(var, value);
	149	return 0;
	150	}
9c5665aa	151	if (!strcmp("http.proxy", var)) {
e4a80ecf MV	152	if (curl_http_proxy == NULL)
e4a80ecf MV	153	return git_config_string(&curl_http_proxy, var, value);
9c5665aa SV	154	return 0;
9c5665aa SV	155	}
3ea099d4	156
29508e1e	157	/* Fall back on the default ones */
ef90d6d4	158	return git_default_config(var, value, cb);
29508e1e NH	159	}
29508e1e NH	160
11979b98 JH	161	static CURL* get_curl_handle(void)
	162	{
	163	CURL* result = curl_easy_init();
	164
a5ccc597 JH	165	if (!curl_ssl_verify) {
	166	curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
	167	curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
	168	} else {
	169	/* Verify authenticity of the peer's certificate */
	170	curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
	171	/* The name in the cert must match whom we tried to connect */
	172	curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
	173	}
	174
11979b98 JH	175	#if LIBCURL_VERSION_NUM >= 0x070907
	176	curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
	177	#endif
	178
	179	if (ssl_cert != NULL)
	180	curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
	181	#if LIBCURL_VERSION_NUM >= 0x070902
	182	if (ssl_key != NULL)
	183	curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
	184	#endif
	185	#if LIBCURL_VERSION_NUM >= 0x070908
	186	if (ssl_capath != NULL)
	187	curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
	188	#endif
	189	if (ssl_cainfo != NULL)
	190	curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
	191	curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
	192
	193	if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
	194	curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
	195	curl_low_speed_limit);
	196	curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
	197	curl_low_speed_time);
	198	}
	199
	200	curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
	201
7982d74e MW	202	if (getenv("GIT_CURL_VERBOSE"))
	203	curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
	204
20fc9bc5 NH	205	curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
20fc9bc5 NH	206
3ea099d4 SK	207	if (curl_ftp_no_epsv)
	208	curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
	209
9c5665aa SV	210	if (curl_http_proxy)
	211	curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
	212
11979b98 JH	213	return result;
	214	}
	215
9fc6440d	216	void http_init(struct remote *remote)
29508e1e NH	217	{
	218	char *low_speed_limit;
	219	char *low_speed_time;
	220
	221	curl_global_init(CURL_GLOBAL_ALL);
	222
9fc6440d MH	223	if (remote && remote->http_proxy)
	224	curl_http_proxy = xstrdup(remote->http_proxy);
	225
29508e1e	226	pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
29508e1e NH	227
	228	#ifdef USE_CURL_MULTI
	229	{
	230	char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
	231	if (http_max_requests != NULL)
	232	max_requests = atoi(http_max_requests);
	233	}
	234
	235	curlm = curl_multi_init();
	236	if (curlm == NULL) {
	237	fprintf(stderr, "Error creating curl multi handle.\n");
	238	exit(1);
	239	}
	240	#endif
	241
	242	if (getenv("GIT_SSL_NO_VERIFY"))
	243	curl_ssl_verify = 0;
	244
	245	ssl_cert = getenv("GIT_SSL_CERT");
	246	#if LIBCURL_VERSION_NUM >= 0x070902
	247	ssl_key = getenv("GIT_SSL_KEY");
	248	#endif
	249	#if LIBCURL_VERSION_NUM >= 0x070908
	250	ssl_capath = getenv("GIT_SSL_CAPATH");
	251	#endif
	252	ssl_cainfo = getenv("GIT_SSL_CAINFO");
	253
	254	low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
	255	if (low_speed_limit != NULL)
	256	curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
	257	low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
	258	if (low_speed_time != NULL)
	259	curl_low_speed_time = strtol(low_speed_time, NULL, 10);
	260
ef90d6d4	261	git_config(http_options, NULL);
29508e1e NH	262
	263	if (curl_ssl_verify == -1)
	264	curl_ssl_verify = 1;
	265
	266	#ifdef USE_CURL_MULTI
	267	if (max_requests < 1)
	268	max_requests = DEFAULT_MAX_REQUESTS;
	269	#endif
	270
3ea099d4 SK	271	if (getenv("GIT_CURL_FTP_NO_EPSV"))
	272	curl_ftp_no_epsv = 1;
	273
29508e1e NH	274	#ifndef NO_CURL_EASY_DUPHANDLE
	275	curl_default = get_curl_handle();
	276	#endif
	277	}
	278
	279	void http_cleanup(void)
	280	{
	281	struct active_request_slot *slot = active_queue_head;
29508e1e NH	282
29508e1e NH	283	while (slot != NULL) {
3278cd0a	284	struct active_request_slot *next = slot->next;
f23d1f76	285	if (slot->curl != NULL) {
29508e1e	286	#ifdef USE_CURL_MULTI
f23d1f76	287	curl_multi_remove_handle(curlm, slot->curl);
29508e1e	288	#endif
29508e1e	289	curl_easy_cleanup(slot->curl);
f23d1f76	290	}
3278cd0a SP	291	free(slot);
3278cd0a SP	292	slot = next;
29508e1e	293	}
3278cd0a	294	active_queue_head = NULL;
29508e1e NH	295
	296	#ifndef NO_CURL_EASY_DUPHANDLE
	297	curl_easy_cleanup(curl_default);
	298	#endif
	299
	300	#ifdef USE_CURL_MULTI
	301	curl_multi_cleanup(curlm);
	302	#endif
	303	curl_global_cleanup();
b3ca4e4e NH	304
b3ca4e4e NH	305	curl_slist_free_all(pragma_header);
3278cd0a	306	pragma_header = NULL;
9fc6440d MH	307
9fc6440d MH	308	if (curl_http_proxy) {
e4a80ecf	309	free((void *)curl_http_proxy);
9fc6440d MH	310	curl_http_proxy = NULL;
9fc6440d MH	311	}
29508e1e NH	312	}
29508e1e NH	313
29508e1e NH	314	struct active_request_slot *get_active_slot(void)
	315	{
	316	struct active_request_slot *slot = active_queue_head;
	317	struct active_request_slot *newslot;
	318
	319	#ifdef USE_CURL_MULTI
	320	int num_transfers;
	321
	322	/* Wait for a slot to open up if the queue is full */
	323	while (active_requests >= max_requests) {
	324	curl_multi_perform(curlm, &num_transfers);
	325	if (num_transfers < active_requests) {
	326	process_curl_messages();
	327	}
	328	}
	329	#endif
	330
	331	while (slot != NULL && slot->in_use) {
	332	slot = slot->next;
	333	}
	334	if (slot == NULL) {
	335	newslot = xmalloc(sizeof(*newslot));
	336	newslot->curl = NULL;
	337	newslot->in_use = 0;
	338	newslot->next = NULL;
	339
	340	slot = active_queue_head;
	341	if (slot == NULL) {
	342	active_queue_head = newslot;
	343	} else {
	344	while (slot->next != NULL) {
	345	slot = slot->next;
	346	}
	347	slot->next = newslot;
	348	}
	349	slot = newslot;
	350	}
	351
	352	if (slot->curl == NULL) {
	353	#ifdef NO_CURL_EASY_DUPHANDLE
	354	slot->curl = get_curl_handle();
	355	#else
	356	slot->curl = curl_easy_duphandle(curl_default);
	357	#endif
	358	}
	359
	360	active_requests++;
	361	slot->in_use = 1;
	362	slot->local = NULL;
c8568e13	363	slot->results = NULL;
baa7b67d	364	slot->finished = NULL;
29508e1e NH	365	slot->callback_data = NULL;
	366	slot->callback_func = NULL;
	367	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
29508e1e	368	curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
9094950d NH	369	curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
	370	curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
	371	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
	372	curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
	373	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
29508e1e NH	374
	375	return slot;
	376	}
	377
	378	int start_active_slot(struct active_request_slot *slot)
	379	{
	380	#ifdef USE_CURL_MULTI
	381	CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
45c17412	382	int num_transfers;
29508e1e NH	383
	384	if (curlm_result != CURLM_OK &&
	385	curlm_result != CURLM_CALL_MULTI_PERFORM) {
	386	active_requests--;
	387	slot->in_use = 0;
	388	return 0;
	389	}
45c17412 DB	390
	391	/*
	392	* We know there must be something to do, since we just added
	393	* something.
	394	*/
	395	curl_multi_perform(curlm, &num_transfers);
29508e1e NH	396	#endif
	397	return 1;
	398	}
	399
	400	#ifdef USE_CURL_MULTI
fc57b6aa DB	401	struct fill_chain {
	402	void *data;
	403	int (fill)(void );
	404	struct fill_chain *next;
	405	};
	406
	407	static struct fill_chain *fill_cfg = NULL;
	408
	409	void add_fill_function(void data, int (fill)(void *))
	410	{
e8eec71d	411	struct fill_chain new = xmalloc(sizeof(new));
fc57b6aa DB	412	struct fill_chain **linkp = &fill_cfg;
	413	new->data = data;
	414	new->fill = fill;
	415	new->next = NULL;
	416	while (*linkp)
	417	linkp = &(*linkp)->next;
	418	*linkp = new;
	419	}
	420
45c17412 DB	421	void fill_active_slots(void)
	422	{
	423	struct active_request_slot *slot = active_queue_head;
	424
fc57b6aa DB	425	while (active_requests < max_requests) {
	426	struct fill_chain *fill;
	427	for (fill = fill_cfg; fill; fill = fill->next)
	428	if (fill->fill(fill->data))
	429	break;
	430
	431	if (!fill)
45c17412	432	break;
fc57b6aa	433	}
45c17412 DB	434
	435	while (slot != NULL) {
	436	if (!slot->in_use && slot->curl != NULL) {
	437	curl_easy_cleanup(slot->curl);
	438	slot->curl = NULL;
	439	}
	440	slot = slot->next;
	441	}
	442	}
	443
29508e1e NH	444	void step_active_slots(void)
	445	{
	446	int num_transfers;
	447	CURLMcode curlm_result;
	448
	449	do {
	450	curlm_result = curl_multi_perform(curlm, &num_transfers);
	451	} while (curlm_result == CURLM_CALL_MULTI_PERFORM);
	452	if (num_transfers < active_requests) {
	453	process_curl_messages();
	454	fill_active_slots();
	455	}
	456	}
	457	#endif
	458
	459	void run_active_slot(struct active_request_slot *slot)
	460	{
	461	#ifdef USE_CURL_MULTI
	462	long last_pos = 0;
	463	long current_pos;
	464	fd_set readfds;
	465	fd_set writefds;
	466	fd_set excfds;
	467	int max_fd;
	468	struct timeval select_timeout;
baa7b67d	469	int finished = 0;
29508e1e	470
baa7b67d NH	471	slot->finished = &finished;
baa7b67d NH	472	while (!finished) {
29508e1e NH	473	data_received = 0;
	474	step_active_slots();
	475
	476	if (!data_received && slot->local != NULL) {
	477	current_pos = ftell(slot->local);
	478	if (current_pos > last_pos)
	479	data_received++;
	480	last_pos = current_pos;
	481	}
	482
	483	if (slot->in_use && !data_received) {
	484	max_fd = 0;
	485	FD_ZERO(&readfds);
	486	FD_ZERO(&writefds);
	487	FD_ZERO(&excfds);
	488	select_timeout.tv_sec = 0;
	489	select_timeout.tv_usec = 50000;
	490	select(max_fd, &readfds, &writefds,
	491	&excfds, &select_timeout);
	492	}
	493	}
	494	#else
	495	while (slot->in_use) {
	496	slot->curl_result = curl_easy_perform(slot->curl);
	497	finish_active_slot(slot);
	498	}
	499	#endif
	500	}
	501
53f31389	502	static void closedown_active_slot(struct active_request_slot *slot)
29508e1e	503	{
028c2976 MH	504	active_requests--;
028c2976 MH	505	slot->in_use = 0;
53f31389 MW	506	}
	507
	508	void release_active_slot(struct active_request_slot *slot)
	509	{
	510	closedown_active_slot(slot);
	511	if (slot->curl) {
b3ca4e4e	512	#ifdef USE_CURL_MULTI
53f31389	513	curl_multi_remove_handle(curlm, slot->curl);
b3ca4e4e	514	#endif
53f31389 MW	515	curl_easy_cleanup(slot->curl);
	516	slot->curl = NULL;
	517	}
b3ca4e4e	518	#ifdef USE_CURL_MULTI
53f31389	519	fill_active_slots();
b3ca4e4e	520	#endif
53f31389 MW	521	}
	522
	523	static void finish_active_slot(struct active_request_slot *slot)
	524	{
	525	closedown_active_slot(slot);
028c2976	526	curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
c8568e13	527
baa7b67d NH	528	if (slot->finished != NULL)
	529	(*slot->finished) = 1;
	530
c8568e13 NH	531	/* Store slot results so they can be read after the slot is reused */
	532	if (slot->results != NULL) {
	533	slot->results->curl_result = slot->curl_result;
	534	slot->results->http_code = slot->http_code;
	535	}
	536
028c2976 MH	537	/* Run callback if appropriate */
	538	if (slot->callback_func != NULL) {
	539	slot->callback_func(slot->callback_data);
	540	}
29508e1e NH	541	}
	542
	543	void finish_all_active_slots(void)
	544	{
	545	struct active_request_slot *slot = active_queue_head;
	546
	547	while (slot != NULL)
	548	if (slot->in_use) {
	549	run_active_slot(slot);
	550	slot = active_queue_head;
	551	} else {
	552	slot = slot->next;
	553	}
	554	}
d7e92806 MH	555
	556	static inline int needs_quote(int ch)
	557	{
	558	if (((ch >= 'A') && (ch <= 'Z'))
	559	\|\| ((ch >= 'a') && (ch <= 'z'))
	560	\|\| ((ch >= '0') && (ch <= '9'))
	561	\|\| (ch == '/')
	562	\|\| (ch == '-')
	563	\|\| (ch == '.'))
	564	return 0;
	565	return 1;
	566	}
	567
	568	static inline int hex(int v)
	569	{
	570	if (v < 10) return '0' + v;
	571	else return 'A' + v - 10;
	572	}
	573
	574	static char quote_ref_url(const char base, const char *ref)
	575	{
113106e0	576	struct strbuf buf = STRBUF_INIT;
d7e92806	577	const char *cp;
113106e0	578	int ch;
d7e92806	579
113106e0 TRC	580	strbuf_addstr(&buf, base);
	581	if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
	582	strbuf_addstr(&buf, "/");
	583
	584	for (cp = ref; (ch = *cp) != 0; cp++)
d7e92806	585	if (needs_quote(ch))
113106e0	586	strbuf_addf(&buf, "%%%02x", ch);
d7e92806	587	else
113106e0	588	strbuf_addch(&buf, *cp);
d7e92806	589
113106e0	590	return strbuf_detach(&buf, NULL);
d7e92806 MH	591	}
d7e92806 MH	592
c13b2633	593	int http_fetch_ref(const char base, struct ref ref)
d7e92806 MH	594	{
	595	char *url;
	596	struct strbuf buffer = STRBUF_INIT;
	597	struct active_request_slot *slot;
	598	struct slot_results results;
	599	int ret;
	600
c13b2633	601	url = quote_ref_url(base, ref->name);
d7e92806 MH	602	slot = get_active_slot();
	603	slot->results = &results;
	604	curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
	605	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	606	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
	607	curl_easy_setopt(slot->curl, CURLOPT_URL, url);
	608	if (start_active_slot(slot)) {
	609	run_active_slot(slot);
	610	if (results.curl_result == CURLE_OK) {
	611	strbuf_rtrim(&buffer);
	612	if (buffer.len == 40)
c13b2633	613	ret = get_sha1_hex(buffer.buf, ref->old_sha1);
be885d96 DB	614	else if (!prefixcmp(buffer.buf, "ref: ")) {
	615	ref->symref = xstrdup(buffer.buf + 5);
	616	ret = 0;
	617	} else
d7e92806 MH	618	ret = 1;
	619	} else {
	620	ret = error("Couldn't get %s for %s\n%s",
c13b2633	621	url, ref->name, curl_errorstr);
d7e92806 MH	622	}
	623	} else {
	624	ret = error("Unable to start request");
	625	}
	626
	627	strbuf_release(&buffer);
	628	free(url);
	629	return ret;
	630	}