[thirdparty/git.git] / http-fetch.c

#include "cache.h"
#include "commit.h"

#include "fetch.h"

#include <curl/curl.h>
#include <curl/easy.h>

#if LIBCURL_VERSION_NUM < 0x070704
#define curl_global_cleanup() do { /* nothing */ } while(0)
#endif
#if LIBCURL_VERSION_NUM < 0x070800
#define curl_global_init(a) do { /* nothing */ } while(0)
#endif

static CURL *curl;
static struct curl_slist *no_pragma_header;

static char *initial_base;

struct alt_base
{
	char *base;
	int got_indices;
	struct packed_git *packs;
	struct alt_base *next;
};

struct alt_base *alt = NULL;

static SHA_CTX c;
static z_stream stream;

static int local;
static int zret;

static int curl_ssl_verify;

struct buffer
{
        size_t posn;
        size_t size;
        void *buffer;
};

static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
                            struct buffer *buffer)
{
        size_t size = eltsize * nmemb;
        if (size > buffer->size - buffer->posn)
                size = buffer->size - buffer->posn;
        memcpy(buffer->buffer + buffer->posn, ptr, size);
        buffer->posn += size;
        return size;
}

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;
	do {
		ssize_t retval = write(local, ptr + posn, size - posn);
		if (retval < 0)
			return posn;
		posn += retval;
	} while (posn < size);

	stream.avail_in = size;
	stream.next_in = ptr;
	do {
		stream.next_out = expn;
		stream.avail_out = sizeof(expn);
		zret = inflate(&stream, Z_SYNC_FLUSH);
		SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	} while (stream.avail_in && zret == Z_OK);
	return size;
}

void prefetch(unsigned char *sha1)
{
}

static int got_alternates = 0;

static int fetch_index(struct alt_base *repo, unsigned char *sha1)
{
	char *filename;
	char *url;

	FILE *indexfile;

	if (has_pack_index(sha1))
		return 0;

	if (get_verbosely)
		fprintf(stderr, "Getting index for pack %s\n",
			sha1_to_hex(sha1));
	
	url = xmalloc(strlen(repo->base) + 64);
	sprintf(url, "%s/objects/pack/pack-%s.idx",
		repo->base, sha1_to_hex(sha1));
	
	filename = sha1_pack_index_name(sha1);
	indexfile = fopen(filename, "w");
	if (!indexfile)
		return error("Unable to open local file %s for pack index",
			     filename);

	curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
	
	if (curl_easy_perform(curl)) {
		fclose(indexfile);
		return error("Unable to get pack index %s", url);
	}

	fclose(indexfile);
	return 0;
}

static int setup_index(struct alt_base *repo, unsigned char *sha1)
{
	struct packed_git *new_pack;
	if (has_pack_file(sha1))
		return 0; // don't list this as something we can get

	if (fetch_index(repo, sha1))
		return -1;

	new_pack = parse_pack_index(sha1);
	new_pack->next = repo->packs;
	repo->packs = new_pack;
	return 0;
}

static int fetch_alternates(char *base)
{
	int ret = 0;
	struct buffer buffer;
	char *url;
	char *data;
	int i = 0;
	int http_specific = 1;
	if (got_alternates)
		return 0;
	data = xmalloc(4096);
	buffer.size = 4095;
	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);

	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(curl, CURLOPT_URL, url);

	if (curl_easy_perform(curl) || !buffer.posn) {
		http_specific = 0;

		sprintf(url, "%s/objects/info/alternates", base);
		
		curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
		curl_easy_setopt(curl, CURLOPT_URL, url);
		
		if (curl_easy_perform(curl)) {
			return 0;
		}
	}

	data[buffer.posn] = '\0';

	while (i < buffer.posn) {
		int posn = i;
		while (posn < buffer.posn && data[posn] != '\n')
			posn++;
		if (data[posn] == '\n') {
			int okay = 0;
			int serverlen = 0;
			struct alt_base *newalt;
			char *target = NULL;
			if (data[i] == '/') {
				serverlen = strchr(base + 8, '/') - base;
				okay = 1;
			} else if (!memcmp(data + i, "../", 3)) {
				i += 3;
				serverlen = strlen(base);
				while (i + 2 < posn && 
				       !memcmp(data + i, "../", 3)) {
					do {
						serverlen--;
					} while (serverlen &&
						 base[serverlen - 1] != '/');
					i += 3;
				}
				// If the server got removed, give up.
				okay = strchr(base, ':') - base + 3 < 
					serverlen;
			} else if (http_specific) {
				char *colon = strchr(data + i, ':');
				char *slash = strchr(data + i, '/');
				if (colon && slash && colon < data + posn &&
				    slash < data + posn && colon < slash) {
					okay = 1;
				}
			}
			// skip 'objects' at end
			if (okay) {
				target = xmalloc(serverlen + posn - i - 6);
				strncpy(target, base, serverlen);
				strncpy(target + serverlen, data + i,
					posn - i - 7);
				target[serverlen + posn - i - 7] = '\0';
				if (get_verbosely)
					fprintf(stderr, 
						"Also look at %s\n", target);
				newalt = xmalloc(sizeof(*newalt));
				newalt->next = alt;
				newalt->base = target;
				newalt->got_indices = 0;
				newalt->packs = NULL;
				alt = newalt;
				ret++;
			}
		}
		i = posn + 1;
	}
	got_alternates = 1;
	
	return ret;
}

static int fetch_indices(struct alt_base *repo)
{
	unsigned char sha1[20];
	char *url;
	struct buffer buffer;
	char *data;
	int i = 0;

	if (repo->got_indices)
		return 0;

	data = xmalloc(4096);
	buffer.size = 4096;
	buffer.posn = 0;
	buffer.buffer = data;

	if (get_verbosely)
		fprintf(stderr, "Getting pack list\n");
	
	url = xmalloc(strlen(repo->base) + 21);
	sprintf(url, "%s/objects/info/packs", repo->base);

	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
	
	if (curl_easy_perform(curl)) {
		return -1;
	}

	while (i < buffer.posn) {
		switch (data[i]) {
		case 'P':
			i++;
			if (i + 52 < buffer.posn &&
			    !strncmp(data + i, " pack-", 6) &&
			    !strncmp(data + i + 46, ".pack\n", 6)) {
				get_sha1_hex(data + i + 6, sha1);
				setup_index(repo, sha1);
				i += 51;
				break;
			}
		default:
			while (data[i] != '\n')
				i++;
		}
		i++;
	}

	repo->got_indices = 1;
	return 0;
}

static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
{
	char *url;
	struct packed_git *target;
	struct packed_git **lst;
	FILE *packfile;
	char *filename;

	if (fetch_indices(repo))
		return -1;
	target = find_sha1_pack(sha1, repo->packs);
	if (!target)
		return -1;

	if (get_verbosely) {
		fprintf(stderr, "Getting pack %s\n",
			sha1_to_hex(target->sha1));
		fprintf(stderr, " which contains %s\n",
			sha1_to_hex(sha1));
	}

	url = xmalloc(strlen(repo->base) + 65);
	sprintf(url, "%s/objects/pack/pack-%s.pack",
		repo->base, sha1_to_hex(target->sha1));

	filename = sha1_pack_name(target->sha1);
	packfile = fopen(filename, "w");
	if (!packfile)
		return error("Unable to open local file %s for pack",
			     filename);

	curl_easy_setopt(curl, CURLOPT_FILE, packfile);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
	
	if (curl_easy_perform(curl)) {
		fclose(packfile);
		return error("Unable to get pack file %s", url);
	}

	fclose(packfile);

	lst = &repo->packs;
	while (*lst != target)
		lst = &((*lst)->next);
	*lst = (*lst)->next;

	install_packed_git(target);

	return 0;
}

int fetch_object(struct alt_base *repo, unsigned char *sha1)
{
	char *hex = sha1_to_hex(sha1);
	char *filename = sha1_file_name(sha1);
	unsigned char real_sha1[20];
	char tmpfile[PATH_MAX];
	int ret;
	char *url;
	char *posn;

	snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX",
		 get_object_directory());

	local = mkstemp(tmpfile);
	if (local < 0)
		return error("Couldn't create temporary file %s for %s: %s\n",
			     tmpfile, filename, strerror(errno));

	memset(&stream, 0, sizeof(stream));

	inflateInit(&stream);

	SHA1_Init(&c);

	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);

	url = xmalloc(strlen(repo->base) + 50);
	strcpy(url, repo->base);
	posn = url + strlen(repo->base);
	strcpy(posn, "objects/");
	posn += 8;
	memcpy(posn, hex, 2);
	posn += 2;
	*(posn++) = '/';
	strcpy(posn, hex + 2);

	curl_easy_setopt(curl, CURLOPT_URL, url);

	if (curl_easy_perform(curl)) {
		unlink(filename);
		return -1;
	}

	fchmod(local, 0444);
	close(local);
	inflateEnd(&stream);
	SHA1_Final(real_sha1, &c);
	if (zret != Z_STREAM_END) {
		unlink(tmpfile);
		return error("File %s (%s) corrupt\n", hex, url);
	}
	if (memcmp(sha1, real_sha1, 20)) {
		unlink(tmpfile);
		return error("File %s has bad hash\n", hex);
	}
	ret = link(tmpfile, filename);
	if (ret < 0) {
		/* Same Coda hack as in write_sha1_file(sha1_file.c) */
		ret = errno;
		if (ret == EXDEV && !rename(tmpfile, filename))
			goto out;
	}
	unlink(tmpfile);
	if (ret) {
		if (ret != EEXIST)
			return error("unable to write sha1 filename %s: %s",
				     filename, strerror(ret));
	}
 out:
	pull_say("got %s\n", hex);
	return 0;
}

int fetch(unsigned char *sha1)
{
	struct alt_base *altbase = alt;
	while (altbase) {
		if (!fetch_object(altbase, sha1))
			return 0;
		if (!fetch_pack(altbase, sha1))
			return 0;
		if (fetch_alternates(altbase->base) > 0) {
			altbase = alt;
			continue;
		}
		altbase = altbase->next;
	}
	return error("Unable to find %s under %s\n", sha1_to_hex(sha1), 
		     initial_base);
}

int fetch_ref(char *ref, unsigned char *sha1)
{
        char *url, *posn;
        char hex[42];
        struct buffer buffer;
	char *base = initial_base;
        buffer.size = 41;
        buffer.posn = 0;
        buffer.buffer = hex;
        hex[41] = '\0';
        
        curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);

        url = xmalloc(strlen(base) + 6 + strlen(ref));
        strcpy(url, base);
        posn = url + strlen(base);
        strcpy(posn, "refs/");
        posn += 5;
        strcpy(posn, ref);

        curl_easy_setopt(curl, CURLOPT_URL, url);

        if (curl_easy_perform(curl))
                return error("Couldn't get %s for %s\n", url, ref);

        hex[40] = '\0';
        get_sha1_hex(hex, sha1);
        return 0;
}

int main(int argc, char **argv)
{
	char *commit_id;
	char *url;
	int arg = 1;

	while (arg < argc && argv[arg][0] == '-') {
		if (argv[arg][1] == 't') {
			get_tree = 1;
		} else if (argv[arg][1] == 'c') {
			get_history = 1;
		} else if (argv[arg][1] == 'a') {
			get_all = 1;
			get_tree = 1;
			get_history = 1;
		} else if (argv[arg][1] == 'v') {
			get_verbosely = 1;
		} else if (argv[arg][1] == 'w') {
			write_ref = argv[arg + 1];
			arg++;
		}
		arg++;
	}
	if (argc < arg + 2) {
		usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
		return 1;
	}
	commit_id = argv[arg];
	url = argv[arg + 1];

	curl_global_init(CURL_GLOBAL_ALL);

	curl = curl_easy_init();
	no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");

	curl_ssl_verify = getenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
#if LIBCURL_VERSION_NUM >= 0x070907
	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
#endif

	alt = xmalloc(sizeof(*alt));
	alt->base = url;
	alt->got_indices = 0;
	alt->packs = NULL;
	alt->next = NULL;
	initial_base = url;

	if (pull(commit_id))
		return 1;

	curl_slist_free_all(no_pragma_header);
	curl_global_cleanup();
	return 0;
}
Commit	Line	Data
6eb7ed54 DB	1	#include "cache.h"
6eb7ed54 DB	2	#include "commit.h"
6eb7ed54	3
215a7ad1	4	#include "fetch.h"
4250a5e5	5
6eb7ed54 DB	6	#include <curl/curl.h>
	7	#include <curl/easy.h>
	8
4a30976e JS	9	#if LIBCURL_VERSION_NUM < 0x070704
	10	#define curl_global_cleanup() do { /* nothing */ } while(0)
	11	#endif
	12	#if LIBCURL_VERSION_NUM < 0x070800
	13	#define curl_global_init(a) do { /* nothing */ } while(0)
	14	#endif
4a30976e	15
6eb7ed54	16	static CURL *curl;
1db69b57	17	static struct curl_slist *no_pragma_header;
6eb7ed54	18
b3661567 DB	19	static char *initial_base;
	20
	21	struct alt_base
	22	{
	23	char *base;
	24	int got_indices;
	25	struct packed_git *packs;
	26	struct alt_base *next;
	27	};
	28
	29	struct alt_base *alt = NULL;
6eb7ed54	30
6eb7ed54 DB	31	static SHA_CTX c;
	32	static z_stream stream;
	33
	34	static int local;
	35	static int zret;
	36
3dcb90f5 DT	37	static int curl_ssl_verify;
3dcb90f5 DT	38
fa3e0655 DB	39	struct buffer
	40	{
	41	size_t posn;
	42	size_t size;
	43	void *buffer;
	44	};
	45
	46	static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
182005b9 DB	47	struct buffer *buffer)
182005b9 DB	48	{
fa3e0655 DB	49	size_t size = eltsize * nmemb;
	50	if (size > buffer->size - buffer->posn)
	51	size = buffer->size - buffer->posn;
	52	memcpy(buffer->buffer + buffer->posn, ptr, size);
	53	buffer->posn += size;
	54	return size;
	55	}
	56
182005b9 DB	57	static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
	58	void *data)
	59	{
bf0f910d	60	unsigned char expn[4096];
6eb7ed54 DB	61	size_t size = eltsize * nmemb;
	62	int posn = 0;
	63	do {
	64	ssize_t retval = write(local, ptr + posn, size - posn);
	65	if (retval < 0)
	66	return posn;
	67	posn += retval;
	68	} while (posn < size);
	69
	70	stream.avail_in = size;
	71	stream.next_in = ptr;
	72	do {
	73	stream.next_out = expn;
	74	stream.avail_out = sizeof(expn);
	75	zret = inflate(&stream, Z_SYNC_FLUSH);
	76	SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	77	} while (stream.avail_in && zret == Z_OK);
	78	return size;
	79	}
	80
1e8be59d DB	81	void prefetch(unsigned char *sha1)
	82	{
	83	}
	84
b3661567	85	static int got_alternates = 0;
182005b9	86
b3661567	87	static int fetch_index(struct alt_base repo, unsigned char sha1)
182005b9 DB	88	{
	89	char *filename;
	90	char *url;
	91
	92	FILE *indexfile;
	93
	94	if (has_pack_index(sha1))
	95	return 0;
	96
	97	if (get_verbosely)
	98	fprintf(stderr, "Getting index for pack %s\n",
	99	sha1_to_hex(sha1));
	100
b3661567	101	url = xmalloc(strlen(repo->base) + 64);
182005b9	102	sprintf(url, "%s/objects/pack/pack-%s.idx",
b3661567	103	repo->base, sha1_to_hex(sha1));
182005b9 DB	104
	105	filename = sha1_pack_index_name(sha1);
	106	indexfile = fopen(filename, "w");
	107	if (!indexfile)
	108	return error("Unable to open local file %s for pack index",
	109	filename);
	110
	111	curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
	112	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	113	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	114	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
182005b9 DB	115
	116	if (curl_easy_perform(curl)) {
	117	fclose(indexfile);
	118	return error("Unable to get pack index %s", url);
	119	}
	120
	121	fclose(indexfile);
	122	return 0;
	123	}
	124
b3661567	125	static int setup_index(struct alt_base repo, unsigned char sha1)
182005b9 DB	126	{
	127	struct packed_git *new_pack;
	128	if (has_pack_file(sha1))
	129	return 0; // don't list this as something we can get
	130
b3661567	131	if (fetch_index(repo, sha1))
182005b9 DB	132	return -1;
	133
	134	new_pack = parse_pack_index(sha1);
b3661567 DB	135	new_pack->next = repo->packs;
b3661567 DB	136	repo->packs = new_pack;
182005b9 DB	137	return 0;
	138	}
	139
b3661567 DB	140	static int fetch_alternates(char *base)
	141	{
	142	int ret = 0;
	143	struct buffer buffer;
	144	char *url;
	145	char *data;
	146	int i = 0;
1b0c1e67	147	int http_specific = 1;
b3661567 DB	148	if (got_alternates)
	149	return 0;
	150	data = xmalloc(4096);
1b0c1e67	151	buffer.size = 4095;
b3661567 DB	152	buffer.posn = 0;
	153	buffer.buffer = data;
	154
	155	if (get_verbosely)
	156	fprintf(stderr, "Getting alternates list\n");
	157
	158	url = xmalloc(strlen(base) + 31);
	159	sprintf(url, "%s/objects/info/http-alternates", base);
	160
	161	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	162	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	163	curl_easy_setopt(curl, CURLOPT_URL, url);
	164
	165	if (curl_easy_perform(curl) \|\| !buffer.posn) {
1b0c1e67 DB	166	http_specific = 0;
1b0c1e67 DB	167
b3661567 DB	168	sprintf(url, "%s/objects/info/alternates", base);
	169
	170	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	171	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	172	curl_easy_setopt(curl, CURLOPT_URL, url);
	173
	174	if (curl_easy_perform(curl)) {
	175	return 0;
	176	}
	177	}
	178
1b0c1e67 DB	179	data[buffer.posn] = '\0';
1b0c1e67 DB	180
b3661567 DB	181	while (i < buffer.posn) {
	182	int posn = i;
	183	while (posn < buffer.posn && data[posn] != '\n')
	184	posn++;
	185	if (data[posn] == '\n') {
1b0c1e67 DB	186	int okay = 0;
	187	int serverlen = 0;
	188	struct alt_base *newalt;
	189	char *target = NULL;
b3661567	190	if (data[i] == '/') {
1b0c1e67 DB	191	serverlen = strchr(base + 8, '/') - base;
	192	okay = 1;
	193	} else if (!memcmp(data + i, "../", 3)) {
	194	i += 3;
	195	serverlen = strlen(base);
	196	while (i + 2 < posn &&
	197	!memcmp(data + i, "../", 3)) {
	198	do {
	199	serverlen--;
	200	} while (serverlen &&
	201	base[serverlen - 1] != '/');
	202	i += 3;
	203	}
	204	// If the server got removed, give up.
	205	okay = strchr(base, ':') - base + 3 <
	206	serverlen;
	207	} else if (http_specific) {
	208	char *colon = strchr(data + i, ':');
	209	char *slash = strchr(data + i, '/');
	210	if (colon && slash && colon < data + posn &&
	211	slash < data + posn && colon < slash) {
	212	okay = 1;
	213	}
	214	}
	215	// skip 'objects' at end
	216	if (okay) {
	217	target = xmalloc(serverlen + posn - i - 6);
b3661567 DB	218	strncpy(target, base, serverlen);
	219	strncpy(target + serverlen, data + i,
	220	posn - i - 7);
	221	target[serverlen + posn - i - 7] = '\0';
	222	if (get_verbosely)
	223	fprintf(stderr,
	224	"Also look at %s\n", target);
	225	newalt = xmalloc(sizeof(*newalt));
	226	newalt->next = alt;
	227	newalt->base = target;
	228	newalt->got_indices = 0;
	229	newalt->packs = NULL;
	230	alt = newalt;
	231	ret++;
	232	}
	233	}
	234	i = posn + 1;
	235	}
	236	got_alternates = 1;
	237
	238	return ret;
	239	}
	240
	241	static int fetch_indices(struct alt_base *repo)
182005b9 DB	242	{
	243	unsigned char sha1[20];
	244	char *url;
	245	struct buffer buffer;
	246	char *data;
	247	int i = 0;
	248
b3661567	249	if (repo->got_indices)
182005b9 DB	250	return 0;
	251
	252	data = xmalloc(4096);
	253	buffer.size = 4096;
	254	buffer.posn = 0;
	255	buffer.buffer = data;
	256
	257	if (get_verbosely)
	258	fprintf(stderr, "Getting pack list\n");
	259
b3661567 DB	260	url = xmalloc(strlen(repo->base) + 21);
b3661567 DB	261	sprintf(url, "%s/objects/info/packs", repo->base);
182005b9 DB	262
	263	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	264	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	265	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	266	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
182005b9 DB	267
182005b9 DB	268	if (curl_easy_perform(curl)) {
1b0c1e67	269	return -1;
182005b9 DB	270	}
182005b9 DB	271
b3661567	272	while (i < buffer.posn) {
182005b9 DB	273	switch (data[i]) {
	274	case 'P':
	275	i++;
	276	if (i + 52 < buffer.posn &&
	277	!strncmp(data + i, " pack-", 6) &&
	278	!strncmp(data + i + 46, ".pack\n", 6)) {
	279	get_sha1_hex(data + i + 6, sha1);
b3661567	280	setup_index(repo, sha1);
182005b9 DB	281	i += 51;
	282	break;
	283	}
	284	default:
	285	while (data[i] != '\n')
	286	i++;
	287	}
	288	i++;
b3661567	289	}
182005b9	290
b3661567	291	repo->got_indices = 1;
182005b9 DB	292	return 0;
	293	}
	294
b3661567	295	static int fetch_pack(struct alt_base repo, unsigned char sha1)
182005b9 DB	296	{
	297	char *url;
	298	struct packed_git *target;
	299	struct packed_git **lst;
	300	FILE *packfile;
	301	char *filename;
	302
b3661567	303	if (fetch_indices(repo))
182005b9	304	return -1;
b3661567	305	target = find_sha1_pack(sha1, repo->packs);
182005b9	306	if (!target)
b3661567	307	return -1;
182005b9 DB	308
	309	if (get_verbosely) {
	310	fprintf(stderr, "Getting pack %s\n",
	311	sha1_to_hex(target->sha1));
	312	fprintf(stderr, " which contains %s\n",
	313	sha1_to_hex(sha1));
	314	}
	315
b3661567	316	url = xmalloc(strlen(repo->base) + 65);
182005b9	317	sprintf(url, "%s/objects/pack/pack-%s.pack",
b3661567	318	repo->base, sha1_to_hex(target->sha1));
182005b9 DB	319
	320	filename = sha1_pack_name(target->sha1);
	321	packfile = fopen(filename, "w");
	322	if (!packfile)
	323	return error("Unable to open local file %s for pack",
	324	filename);
	325
	326	curl_easy_setopt(curl, CURLOPT_FILE, packfile);
	327	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	328	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	329	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
182005b9 DB	330
	331	if (curl_easy_perform(curl)) {
	332	fclose(packfile);
	333	return error("Unable to get pack file %s", url);
	334	}
	335
	336	fclose(packfile);
	337
b3661567	338	lst = &repo->packs;
182005b9 DB	339	while (*lst != target)
	340	lst = &((*lst)->next);
	341	lst = (lst)->next;
	342
	343	install_packed_git(target);
	344
	345	return 0;
	346	}
	347
b3661567	348	int fetch_object(struct alt_base repo, unsigned char sha1)
6eb7ed54 DB	349	{
	350	char *hex = sha1_to_hex(sha1);
	351	char *filename = sha1_file_name(sha1);
bf0f910d	352	unsigned char real_sha1[20];
09d92083 JH	353	char tmpfile[PATH_MAX];
09d92083 JH	354	int ret;
6eb7ed54 DB	355	char *url;
	356	char *posn;
	357
09d92083 JH	358	snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX",
09d92083 JH	359	get_object_directory());
6eb7ed54	360
09d92083	361	local = mkstemp(tmpfile);
6eb7ed54	362	if (local < 0)
09d92083 JH	363	return error("Couldn't create temporary file %s for %s: %s\n",
09d92083 JH	364	tmpfile, filename, strerror(errno));
6eb7ed54 DB	365
	366	memset(&stream, 0, sizeof(stream));
	367
	368	inflateInit(&stream);
	369
	370	SHA1_Init(&c);
	371
182005b9	372	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
6eb7ed54 DB	373	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
6eb7ed54 DB	374	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1db69b57	375	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
6eb7ed54	376
b3661567 DB	377	url = xmalloc(strlen(repo->base) + 50);
	378	strcpy(url, repo->base);
	379	posn = url + strlen(repo->base);
6eb7ed54 DB	380	strcpy(posn, "objects/");
	381	posn += 8;
	382	memcpy(posn, hex, 2);
	383	posn += 2;
	384	*(posn++) = '/';
	385	strcpy(posn, hex + 2);
	386
	387	curl_easy_setopt(curl, CURLOPT_URL, url);
	388
182005b9 DB	389	if (curl_easy_perform(curl)) {
182005b9 DB	390	unlink(filename);
b3661567	391	return -1;
182005b9	392	}
6eb7ed54	393
09d92083	394	fchmod(local, 0444);
6eb7ed54 DB	395	close(local);
	396	inflateEnd(&stream);
	397	SHA1_Final(real_sha1, &c);
	398	if (zret != Z_STREAM_END) {
09d92083	399	unlink(tmpfile);
6eb7ed54 DB	400	return error("File %s (%s) corrupt\n", hex, url);
	401	}
	402	if (memcmp(sha1, real_sha1, 20)) {
09d92083	403	unlink(tmpfile);
6eb7ed54 DB	404	return error("File %s has bad hash\n", hex);
6eb7ed54 DB	405	}
09d92083 JH	406	ret = link(tmpfile, filename);
	407	if (ret < 0) {
	408	/* Same Coda hack as in write_sha1_file(sha1_file.c) */
	409	ret = errno;
	410	if (ret == EXDEV && !rename(tmpfile, filename))
	411	goto out;
	412	}
	413	unlink(tmpfile);
	414	if (ret) {
	415	if (ret != EEXIST)
	416	return error("unable to write sha1 filename %s: %s",
	417	filename, strerror(ret));
	418	}
	419	out:
e78d9772	420	pull_say("got %s\n", hex);
6eb7ed54 DB	421	return 0;
	422	}
	423
b3661567 DB	424	int fetch(unsigned char *sha1)
	425	{
	426	struct alt_base *altbase = alt;
	427	while (altbase) {
	428	if (!fetch_object(altbase, sha1))
	429	return 0;
	430	if (!fetch_pack(altbase, sha1))
	431	return 0;
	432	if (fetch_alternates(altbase->base) > 0) {
	433	altbase = alt;
	434	continue;
	435	}
	436	altbase = altbase->next;
	437	}
	438	return error("Unable to find %s under %s\n", sha1_to_hex(sha1),
	439	initial_base);
	440	}
	441
cd541a68 DB	442	int fetch_ref(char ref, unsigned char sha1)
cd541a68 DB	443	{
fa3e0655 DB	444	char url, posn;
	445	char hex[42];
	446	struct buffer buffer;
b3661567	447	char *base = initial_base;
fa3e0655 DB	448	buffer.size = 41;
	449	buffer.posn = 0;
	450	buffer.buffer = hex;
	451	hex[41] = '\0';
	452
	453	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	454	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1db69b57	455	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
fa3e0655 DB	456
	457	url = xmalloc(strlen(base) + 6 + strlen(ref));
	458	strcpy(url, base);
	459	posn = url + strlen(base);
	460	strcpy(posn, "refs/");
	461	posn += 5;
	462	strcpy(posn, ref);
	463
	464	curl_easy_setopt(curl, CURLOPT_URL, url);
	465
	466	if (curl_easy_perform(curl))
	467	return error("Couldn't get %s for %s\n", url, ref);
	468
	469	hex[40] = '\0';
	470	get_sha1_hex(hex, sha1);
	471	return 0;
cd541a68 DB	472	}
cd541a68 DB	473
6eb7ed54 DB	474	int main(int argc, char **argv)
	475	{
	476	char *commit_id;
	477	char *url;
	478	int arg = 1;
6eb7ed54 DB	479
	480	while (arg < argc && argv[arg][0] == '-') {
	481	if (argv[arg][1] == 't') {
4250a5e5	482	get_tree = 1;
6eb7ed54	483	} else if (argv[arg][1] == 'c') {
4250a5e5	484	get_history = 1;
6eb7ed54	485	} else if (argv[arg][1] == 'a') {
4250a5e5 DB	486	get_all = 1;
	487	get_tree = 1;
	488	get_history = 1;
e78d9772 JH	489	} else if (argv[arg][1] == 'v') {
e78d9772 JH	490	get_verbosely = 1;
fa3e0655 DB	491	} else if (argv[arg][1] == 'w') {
	492	write_ref = argv[arg + 1];
	493	arg++;
6eb7ed54 DB	494	}
	495	arg++;
	496	}
	497	if (argc < arg + 2) {
215a7ad1	498	usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
6eb7ed54 DB	499	return 1;
	500	}
	501	commit_id = argv[arg];
	502	url = argv[arg + 1];
	503
6eb7ed54 DB	504	curl_global_init(CURL_GLOBAL_ALL);
	505
	506	curl = curl_easy_init();
1db69b57	507	no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
6eb7ed54	508
a9ab586a	509	curl_ssl_verify = getenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
3dcb90f5	510	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
9f6cf65e	511	#if LIBCURL_VERSION_NUM >= 0x070907
3dcb90f5	512	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
9f6cf65e	513	#endif
3dcb90f5	514
b3661567 DB	515	alt = xmalloc(sizeof(*alt));
	516	alt->base = url;
	517	alt->got_indices = 0;
	518	alt->packs = NULL;
	519	alt->next = NULL;
	520	initial_base = url;
6eb7ed54	521
4250a5e5	522	if (pull(commit_id))
6eb7ed54 DB	523	return 1;
6eb7ed54 DB	524
1db69b57	525	curl_slist_free_all(no_pragma_header);
6eb7ed54 DB	526	curl_global_cleanup();
	527	return 0;
	528	}