[thirdparty/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

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

	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
4a30976e	15
6eb7ed54 DB	16	static CURL *curl;
	17
	18	static char *base;
	19
6eb7ed54 DB	20	static SHA_CTX c;
	21	static z_stream stream;
	22
	23	static int local;
	24	static int zret;
	25
3dcb90f5 DT	26	static int curl_ssl_verify;
3dcb90f5 DT	27
fa3e0655 DB	28	struct buffer
	29	{
	30	size_t posn;
	31	size_t size;
	32	void *buffer;
	33	};
	34
	35	static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
	36	struct buffer *buffer) {
	37	size_t size = eltsize * nmemb;
	38	if (size > buffer->size - buffer->posn)
	39	size = buffer->size - buffer->posn;
	40	memcpy(buffer->buffer + buffer->posn, ptr, size);
	41	buffer->posn += size;
	42	return size;
	43	}
	44
6eb7ed54 DB	45	static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
6eb7ed54 DB	46	void *data) {
bf0f910d	47	unsigned char expn[4096];
6eb7ed54 DB	48	size_t size = eltsize * nmemb;
	49	int posn = 0;
	50	do {
	51	ssize_t retval = write(local, ptr + posn, size - posn);
	52	if (retval < 0)
	53	return posn;
	54	posn += retval;
	55	} while (posn < size);
	56
	57	stream.avail_in = size;
	58	stream.next_in = ptr;
	59	do {
	60	stream.next_out = expn;
	61	stream.avail_out = sizeof(expn);
	62	zret = inflate(&stream, Z_SYNC_FLUSH);
	63	SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	64	} while (stream.avail_in && zret == Z_OK);
	65	return size;
	66	}
	67
4250a5e5	68	int fetch(unsigned char *sha1)
6eb7ed54 DB	69	{
	70	char *hex = sha1_to_hex(sha1);
	71	char *filename = sha1_file_name(sha1);
bf0f910d	72	unsigned char real_sha1[20];
6eb7ed54 DB	73	char *url;
	74	char *posn;
	75
6eb7ed54 DB	76	local = open(filename, O_WRONLY \| O_CREAT \| O_EXCL, 0666);
	77
	78	if (local < 0)
	79	return error("Couldn't open %s\n", filename);
	80
	81	memset(&stream, 0, sizeof(stream));
	82
	83	inflateInit(&stream);
	84
	85	SHA1_Init(&c);
	86
	87	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	88	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
	89
812666c8	90	url = xmalloc(strlen(base) + 50);
6eb7ed54 DB	91	strcpy(url, base);
	92	posn = url + strlen(base);
	93	strcpy(posn, "objects/");
	94	posn += 8;
	95	memcpy(posn, hex, 2);
	96	posn += 2;
	97	*(posn++) = '/';
	98	strcpy(posn, hex + 2);
	99
	100	curl_easy_setopt(curl, CURLOPT_URL, url);
	101
6eb7ed54 DB	102	if (curl_easy_perform(curl))
	103	return error("Couldn't get %s for %s\n", url, hex);
	104
	105	close(local);
	106	inflateEnd(&stream);
	107	SHA1_Final(real_sha1, &c);
	108	if (zret != Z_STREAM_END) {
	109	unlink(filename);
	110	return error("File %s (%s) corrupt\n", hex, url);
	111	}
	112	if (memcmp(sha1, real_sha1, 20)) {
	113	unlink(filename);
	114	return error("File %s has bad hash\n", hex);
	115	}
	116
e78d9772	117	pull_say("got %s\n", hex);
6eb7ed54 DB	118	return 0;
	119	}
	120
cd541a68 DB	121	int fetch_ref(char ref, unsigned char sha1)
cd541a68 DB	122	{
fa3e0655 DB	123	char url, posn;
	124	char hex[42];
	125	struct buffer buffer;
	126	buffer.size = 41;
	127	buffer.posn = 0;
	128	buffer.buffer = hex;
	129	hex[41] = '\0';
	130
	131	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	132	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	133
	134	url = xmalloc(strlen(base) + 6 + strlen(ref));
	135	strcpy(url, base);
	136	posn = url + strlen(base);
	137	strcpy(posn, "refs/");
	138	posn += 5;
	139	strcpy(posn, ref);
	140
	141	curl_easy_setopt(curl, CURLOPT_URL, url);
	142
	143	if (curl_easy_perform(curl))
	144	return error("Couldn't get %s for %s\n", url, ref);
	145
	146	hex[40] = '\0';
	147	get_sha1_hex(hex, sha1);
	148	return 0;
cd541a68 DB	149	}
cd541a68 DB	150
6eb7ed54 DB	151	int main(int argc, char **argv)
	152	{
	153	char *commit_id;
	154	char *url;
	155	int arg = 1;
6eb7ed54 DB	156
	157	while (arg < argc && argv[arg][0] == '-') {
	158	if (argv[arg][1] == 't') {
4250a5e5	159	get_tree = 1;
6eb7ed54	160	} else if (argv[arg][1] == 'c') {
4250a5e5	161	get_history = 1;
6eb7ed54	162	} else if (argv[arg][1] == 'a') {
4250a5e5 DB	163	get_all = 1;
	164	get_tree = 1;
	165	get_history = 1;
e78d9772 JH	166	} else if (argv[arg][1] == 'v') {
e78d9772 JH	167	get_verbosely = 1;
fa3e0655 DB	168	} else if (argv[arg][1] == 'w') {
	169	write_ref = argv[arg + 1];
	170	arg++;
6eb7ed54 DB	171	}
	172	arg++;
	173	}
	174	if (argc < arg + 2) {
fa3e0655	175	usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
6eb7ed54 DB	176	return 1;
	177	}
	178	commit_id = argv[arg];
	179	url = argv[arg + 1];
	180
6eb7ed54 DB	181	curl_global_init(CURL_GLOBAL_ALL);
	182
	183	curl = curl_easy_init();
	184
3dcb90f5 DT	185	curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
3dcb90f5 DT	186	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
9f6cf65e	187	#if LIBCURL_VERSION_NUM >= 0x070907
3dcb90f5	188	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
9f6cf65e	189	#endif
3dcb90f5	190
6eb7ed54 DB	191	base = url;
6eb7ed54 DB	192
4250a5e5	193	if (pull(commit_id))
6eb7ed54 DB	194	return 1;
	195
	196	curl_global_cleanup();
	197	return 0;
	198	}