[git/git.git] / http-pull.c

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

#include "pull.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
#if LIBCURL_VERSION_NUM < 0x070907
#define curl_easy_setopt(a, b, c) do { /* nothing */ } while(0)
#endif

static CURL *curl;

static char *base;

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;
}

int fetch(unsigned char *sha1)
{
	char *hex = sha1_to_hex(sha1);
	char *filename = sha1_file_name(sha1);
	unsigned char real_sha1[20];
	char *url;
	char *posn;

	local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);

	if (local < 0)
		return error("Couldn't open %s\n", filename);

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

	inflateInit(&stream);

	SHA1_Init(&c);

	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);

	url = xmalloc(strlen(base) + 50);
	strcpy(url, base);
	posn = url + strlen(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))
		return error("Couldn't get %s for %s\n", url, hex);

	close(local);
	inflateEnd(&stream);
	SHA1_Final(real_sha1, &c);
	if (zret != Z_STREAM_END) {
		unlink(filename);
		return error("File %s (%s) corrupt\n", hex, url);
	}
	if (memcmp(sha1, real_sha1, 20)) {
		unlink(filename);
		return error("File %s has bad hash\n", hex);
	}
	
	pull_say("got %s\n", hex);
	return 0;
}

int fetch_ref(char *ref, unsigned char *sha1)
{
        char *url, *posn;
        char hex[42];
        struct buffer buffer;
        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);

        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-pull [-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();

	curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);

	base = url;

	if (pull(commit_id))
		return 1;

	curl_global_cleanup();
	return 0;
}
Commit	Line	Data
6eb7ed54 DB	1	#include "cache.h"
6eb7ed54 DB	2	#include "commit.h"
6eb7ed54	3
4250a5e5 DB	4	#include "pull.h"
4250a5e5 DB	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
	15	#if LIBCURL_VERSION_NUM < 0x070907
	16	#define curl_easy_setopt(a, b, c) do { /* nothing */ } while(0)
	17	#endif
	18
6eb7ed54 DB	19	static CURL *curl;
	20
	21	static char *base;
	22
6eb7ed54 DB	23	static SHA_CTX c;
	24	static z_stream stream;
	25
	26	static int local;
	27	static int zret;
	28
3dcb90f5 DT	29	static int curl_ssl_verify;
3dcb90f5 DT	30
fa3e0655 DB	31	struct buffer
	32	{
	33	size_t posn;
	34	size_t size;
	35	void *buffer;
	36	};
	37
	38	static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
	39	struct buffer *buffer) {
	40	size_t size = eltsize * nmemb;
	41	if (size > buffer->size - buffer->posn)
	42	size = buffer->size - buffer->posn;
	43	memcpy(buffer->buffer + buffer->posn, ptr, size);
	44	buffer->posn += size;
	45	return size;
	46	}
	47
6eb7ed54 DB	48	static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
6eb7ed54 DB	49	void *data) {
bf0f910d	50	unsigned char expn[4096];
6eb7ed54 DB	51	size_t size = eltsize * nmemb;
	52	int posn = 0;
	53	do {
	54	ssize_t retval = write(local, ptr + posn, size - posn);
	55	if (retval < 0)
	56	return posn;
	57	posn += retval;
	58	} while (posn < size);
	59
	60	stream.avail_in = size;
	61	stream.next_in = ptr;
	62	do {
	63	stream.next_out = expn;
	64	stream.avail_out = sizeof(expn);
	65	zret = inflate(&stream, Z_SYNC_FLUSH);
	66	SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	67	} while (stream.avail_in && zret == Z_OK);
	68	return size;
	69	}
	70
4250a5e5	71	int fetch(unsigned char *sha1)
6eb7ed54 DB	72	{
	73	char *hex = sha1_to_hex(sha1);
	74	char *filename = sha1_file_name(sha1);
bf0f910d	75	unsigned char real_sha1[20];
6eb7ed54 DB	76	char *url;
	77	char *posn;
	78
6eb7ed54 DB	79	local = open(filename, O_WRONLY \| O_CREAT \| O_EXCL, 0666);
	80
	81	if (local < 0)
	82	return error("Couldn't open %s\n", filename);
	83
	84	memset(&stream, 0, sizeof(stream));
	85
	86	inflateInit(&stream);
	87
	88	SHA1_Init(&c);
	89
	90	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	91	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
	92
812666c8	93	url = xmalloc(strlen(base) + 50);
6eb7ed54 DB	94	strcpy(url, base);
	95	posn = url + strlen(base);
	96	strcpy(posn, "objects/");
	97	posn += 8;
	98	memcpy(posn, hex, 2);
	99	posn += 2;
	100	*(posn++) = '/';
	101	strcpy(posn, hex + 2);
	102
	103	curl_easy_setopt(curl, CURLOPT_URL, url);
	104
6eb7ed54 DB	105	if (curl_easy_perform(curl))
	106	return error("Couldn't get %s for %s\n", url, hex);
	107
	108	close(local);
	109	inflateEnd(&stream);
	110	SHA1_Final(real_sha1, &c);
	111	if (zret != Z_STREAM_END) {
	112	unlink(filename);
	113	return error("File %s (%s) corrupt\n", hex, url);
	114	}
	115	if (memcmp(sha1, real_sha1, 20)) {
	116	unlink(filename);
	117	return error("File %s has bad hash\n", hex);
	118	}
	119
e78d9772	120	pull_say("got %s\n", hex);
6eb7ed54 DB	121	return 0;
	122	}
	123
cd541a68 DB	124	int fetch_ref(char ref, unsigned char sha1)
cd541a68 DB	125	{
fa3e0655 DB	126	char url, posn;
	127	char hex[42];
	128	struct buffer buffer;
	129	buffer.size = 41;
	130	buffer.posn = 0;
	131	buffer.buffer = hex;
	132	hex[41] = '\0';
	133
	134	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	135	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	136
	137	url = xmalloc(strlen(base) + 6 + strlen(ref));
	138	strcpy(url, base);
	139	posn = url + strlen(base);
	140	strcpy(posn, "refs/");
	141	posn += 5;
	142	strcpy(posn, ref);
	143
	144	curl_easy_setopt(curl, CURLOPT_URL, url);
	145
	146	if (curl_easy_perform(curl))
	147	return error("Couldn't get %s for %s\n", url, ref);
	148
	149	hex[40] = '\0';
	150	get_sha1_hex(hex, sha1);
	151	return 0;
cd541a68 DB	152	}
cd541a68 DB	153
6eb7ed54 DB	154	int main(int argc, char **argv)
	155	{
	156	char *commit_id;
	157	char *url;
	158	int arg = 1;
6eb7ed54 DB	159
	160	while (arg < argc && argv[arg][0] == '-') {
	161	if (argv[arg][1] == 't') {
4250a5e5	162	get_tree = 1;
6eb7ed54	163	} else if (argv[arg][1] == 'c') {
4250a5e5	164	get_history = 1;
6eb7ed54	165	} else if (argv[arg][1] == 'a') {
4250a5e5 DB	166	get_all = 1;
	167	get_tree = 1;
	168	get_history = 1;
e78d9772 JH	169	} else if (argv[arg][1] == 'v') {
e78d9772 JH	170	get_verbosely = 1;
fa3e0655 DB	171	} else if (argv[arg][1] == 'w') {
	172	write_ref = argv[arg + 1];
	173	arg++;
6eb7ed54 DB	174	}
	175	arg++;
	176	}
	177	if (argc < arg + 2) {
fa3e0655	178	usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
6eb7ed54 DB	179	return 1;
	180	}
	181	commit_id = argv[arg];
	182	url = argv[arg + 1];
	183
6eb7ed54 DB	184	curl_global_init(CURL_GLOBAL_ALL);
	185
	186	curl = curl_easy_init();
	187
3dcb90f5 DT	188	curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
	189	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
	190	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
	191
6eb7ed54 DB	192	base = url;
6eb7ed54 DB	193
4250a5e5	194	if (pull(commit_id))
6eb7ed54 DB	195	return 1;
	196
	197	curl_global_cleanup();
	198	return 0;
	199	}