#include "cache.h"
-#include "commit.h"
-#include "pack.h"
-#include "fetch.h"
-
-#include <curl/curl.h>
-#include <curl/easy.h>
-
-#if LIBCURL_VERSION_NUM >= 0x070908
-#define USE_CURL_MULTI
-#define DEFAULT_MAX_REQUESTS 5
-#endif
-
-#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 < 0x070c04
-#define NO_CURL_EASY_DUPHANDLE
-#endif
-
-#define PREV_BUF_SIZE 4096
-#define RANGE_HEADER_SIZE 30
-
-static int active_requests = 0;
-static int data_received;
-
-#ifdef USE_CURL_MULTI
-static int max_requests = -1;
-static CURLM *curlm;
-#endif
-#ifndef NO_CURL_EASY_DUPHANDLE
-static CURL *curl_default;
-#endif
-static struct curl_slist *pragma_header;
-static struct curl_slist *no_pragma_header;
-static struct curl_slist *no_range_header;
-static char curl_errorstr[CURL_ERROR_SIZE];
-
-struct alt_base
-{
- char *base;
- int got_indices;
- struct packed_git *packs;
- struct alt_base *next;
-};
-
-static struct alt_base *alt = NULL;
-
-enum transfer_state {
- WAITING,
- ABORTED,
- ACTIVE,
- COMPLETE,
-};
-
-struct transfer_request
-{
- unsigned char sha1[20];
- struct alt_base *repo;
- char *url;
- char filename[PATH_MAX];
- char tmpfile[PATH_MAX];
- int local;
- enum transfer_state state;
- CURLcode curl_result;
- char errorstr[CURL_ERROR_SIZE];
- long http_code;
- unsigned char real_sha1[20];
- SHA_CTX c;
- z_stream stream;
- int zret;
- int rename;
- struct active_request_slot *slot;
- struct transfer_request *next;
-};
-
-struct active_request_slot
-{
- CURL *curl;
- FILE *local;
- int in_use;
- int done;
- CURLcode curl_result;
- struct active_request_slot *next;
-};
-
-static struct transfer_request *request_queue_head = NULL;
-static struct active_request_slot *active_queue_head = NULL;
-
-static int curl_ssl_verify = -1;
-static char *ssl_cert = NULL;
-#if LIBCURL_VERSION_NUM >= 0x070902
-static char *ssl_key = NULL;
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
-static char *ssl_capath = NULL;
-#endif
-static char *ssl_cainfo = NULL;
-static long curl_low_speed_limit = -1;
-static long curl_low_speed_time = -1;
-
-struct buffer
-{
- size_t posn;
- size_t size;
- void *buffer;
-};
-
-static int http_options(const char *var, const char *value)
-{
- 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) {
- ssl_cert = xmalloc(strlen(value)+1);
- strcpy(ssl_cert, value);
- }
- return 0;
- }
-#if LIBCURL_VERSION_NUM >= 0x070902
- if (!strcmp("http.sslkey", var)) {
- if (ssl_key == NULL) {
- ssl_key = xmalloc(strlen(value)+1);
- strcpy(ssl_key, value);
- }
- return 0;
- }
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
- if (!strcmp("http.sslcapath", var)) {
- if (ssl_capath == NULL) {
- ssl_capath = xmalloc(strlen(value)+1);
- strcpy(ssl_capath, value);
- }
- return 0;
- }
-#endif
- if (!strcmp("http.sslcainfo", var)) {
- if (ssl_cainfo == NULL) {
- ssl_cainfo = xmalloc(strlen(value)+1);
- strcpy(ssl_cainfo, 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;
- }
-
- /* Fall back on the default ones */
- return git_default_config(var, value);
-}
-
-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;
- data_received++;
- return size;
-}
-
-static size_t fwrite_buffer_dynamic(const void *ptr, size_t eltsize,
- size_t nmemb, struct buffer *buffer)
-{
- size_t size = eltsize * nmemb;
- if (size > buffer->size - buffer->posn) {
- buffer->size = buffer->size * 3 / 2;
- if (buffer->size < buffer->posn + size)
- buffer->size = buffer->posn + size;
- buffer->buffer = xrealloc(buffer->buffer, buffer->size);
- }
- memcpy(buffer->buffer + buffer->posn, ptr, size);
- buffer->posn += size;
- data_received++;
- 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;
- struct transfer_request *request = (struct transfer_request *)data;
- do {
- ssize_t retval = write(request->local,
- ptr + posn, size - posn);
- if (retval < 0)
- return posn;
- posn += retval;
- } while (posn < size);
-
- request->stream.avail_in = size;
- request->stream.next_in = ptr;
- do {
- request->stream.next_out = expn;
- request->stream.avail_out = sizeof(expn);
- request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
- SHA1_Update(&request->c, expn,
- sizeof(expn) - request->stream.avail_out);
- } while (request->stream.avail_in && request->zret == Z_OK);
- data_received++;
- return size;
-}
-
-#ifdef USE_CURL_MULTI
-static void process_curl_messages(void);
-static void process_request_queue(void);
-#endif
-
-static CURL* get_curl_handle(void)
-{
- CURL* result = curl_easy_init();
-
- curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
-#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);
- }
-
- return result;
-}
-
-static 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->done = 0;
- slot->local = NULL;
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_range_header);
- curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
-
- return slot;
-}
-
-static int start_active_slot(struct active_request_slot *slot)
-{
-#ifdef USE_CURL_MULTI
- CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
-
- if (curlm_result != CURLM_OK &&
- curlm_result != CURLM_CALL_MULTI_PERFORM) {
- active_requests--;
- slot->in_use = 0;
- return 0;
- }
-#endif
- return 1;
-}
-
-static void run_active_slot(struct active_request_slot *slot)
-{
-#ifdef USE_CURL_MULTI
- int num_transfers;
- long last_pos = 0;
- long current_pos;
- fd_set readfds;
- fd_set writefds;
- fd_set excfds;
- int max_fd;
- struct timeval select_timeout;
- CURLMcode curlm_result;
-
- while (!slot->done) {
- data_received = 0;
- do {
- curlm_result = curl_multi_perform(curlm,
- &num_transfers);
- } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
- if (num_transfers < active_requests) {
- process_curl_messages();
- process_request_queue();
- }
-
- if (!data_received && slot->local != NULL) {
- current_pos = ftell(slot->local);
- if (current_pos > last_pos)
- data_received++;
- last_pos = current_pos;
- }
-
- if (!slot->done && !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
- slot->curl_result = curl_easy_perform(slot->curl);
- active_requests--;
-#endif
-}
-
-static void start_request(struct transfer_request *request)
-{
- char *hex = sha1_to_hex(request->sha1);
- char prevfile[PATH_MAX];
- char *url;
- char *posn;
- int prevlocal;
- unsigned char prev_buf[PREV_BUF_SIZE];
- ssize_t prev_read = 0;
- long prev_posn = 0;
- char range[RANGE_HEADER_SIZE];
- struct curl_slist *range_header = NULL;
- struct active_request_slot *slot;
-
- snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
- unlink(prevfile);
- rename(request->tmpfile, prevfile);
- unlink(request->tmpfile);
-
- request->local = open(request->tmpfile,
- O_WRONLY | O_CREAT | O_EXCL, 0666);
- /* This could have failed due to the "lazy directory creation";
- * try to mkdir the last path component.
- */
- if (request->local < 0 && errno == ENOENT) {
- char *dir = strrchr(request->tmpfile, '/');
- if (dir) {
- *dir = 0;
- mkdir(request->tmpfile, 0777);
- *dir = '/';
- }
- request->local = open(request->tmpfile,
- O_WRONLY | O_CREAT | O_EXCL, 0666);
- }
-
- if (request->local < 0) {
- request->state = ABORTED;
- error("Couldn't create temporary file %s for %s: %s\n",
- request->tmpfile, request->filename, strerror(errno));
- return;
- }
-
- memset(&request->stream, 0, sizeof(request->stream));
-
- inflateInit(&request->stream);
-
- SHA1_Init(&request->c);
-
- url = xmalloc(strlen(request->repo->base) + 50);
- request->url = xmalloc(strlen(request->repo->base) + 50);
- strcpy(url, request->repo->base);
- posn = url + strlen(request->repo->base);
- strcpy(posn, "objects/");
- posn += 8;
- memcpy(posn, hex, 2);
- posn += 2;
- *(posn++) = '/';
- strcpy(posn, hex + 2);
- strcpy(request->url, url);
-
- /* If a previous temp file is present, process what was already
- fetched. */
- prevlocal = open(prevfile, O_RDONLY);
- if (prevlocal != -1) {
- do {
- prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
- if (prev_read>0) {
- if (fwrite_sha1_file(prev_buf,
- 1,
- prev_read,
- request) == prev_read) {
- prev_posn += prev_read;
- } else {
- prev_read = -1;
- }
- }
- } while (prev_read > 0);
- close(prevlocal);
- }
- unlink(prevfile);
-
- /* Reset inflate/SHA1 if there was an error reading the previous temp
- file; also rewind to the beginning of the local file. */
- if (prev_read == -1) {
- memset(&request->stream, 0, sizeof(request->stream));
- inflateInit(&request->stream);
- SHA1_Init(&request->c);
- if (prev_posn>0) {
- prev_posn = 0;
- lseek(request->local, SEEK_SET, 0);
- ftruncate(request->local, 0);
- }
- }
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
- curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
-
- /* If we have successfully processed data from a previous fetch
- attempt, only fetch the data we don't already have. */
- if (prev_posn>0) {
- if (get_verbosely)
- fprintf(stderr,
- "Resuming fetch of object %s at byte %ld\n",
- hex, prev_posn);
- sprintf(range, "Range: bytes=%ld-", prev_posn);
- range_header = curl_slist_append(range_header, range);
- curl_easy_setopt(slot->curl,
- CURLOPT_HTTPHEADER, range_header);
- }
-
- /* Try to get the request started, abort the request on error */
- if (!start_active_slot(slot)) {
- request->state = ABORTED;
- close(request->local);
- free(request->url);
- return;
- }
-
- request->slot = slot;
- request->state = ACTIVE;
-}
-
-static void finish_request(struct transfer_request *request)
-{
- fchmod(request->local, 0444);
- close(request->local);
-
- if (request->http_code == 416) {
- fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
- } else if (request->curl_result != CURLE_OK) {
- return;
- }
-
- inflateEnd(&request->stream);
- SHA1_Final(request->real_sha1, &request->c);
- if (request->zret != Z_STREAM_END) {
- unlink(request->tmpfile);
- return;
- }
- if (memcmp(request->sha1, request->real_sha1, 20)) {
- unlink(request->tmpfile);
- return;
- }
- request->rename =
- move_temp_to_file(request->tmpfile, request->filename);
-
- if (request->rename == 0)
- pull_say("got %s\n", sha1_to_hex(request->sha1));
-}
-
-static void release_request(struct transfer_request *request)
-{
- struct transfer_request *entry = request_queue_head;
-
- if (request == request_queue_head) {
- request_queue_head = request->next;
- } else {
- while (entry->next != NULL && entry->next != request)
- entry = entry->next;
- if (entry->next == request)
- entry->next = entry->next->next;
- }
-
- free(request->url);
- free(request);
-}
-
-#ifdef USE_CURL_MULTI
-void process_curl_messages(void)
-{
- int num_messages;
- struct active_request_slot *slot;
- struct transfer_request *request = NULL;
- CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
-
- while (curl_message != NULL) {
- if (curl_message->msg == CURLMSG_DONE) {
- 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);
- active_requests--;
- slot->done = 1;
- slot->in_use = 0;
- slot->curl_result = curl_message->data.result;
- request = request_queue_head;
- while (request != NULL &&
- request->slot != slot)
- request = request->next;
- } else {
- fprintf(stderr, "Received DONE message for unknown request!\n");
- }
- if (request != NULL) {
- request->curl_result =
- curl_message->data.result;
- curl_easy_getinfo(slot->curl,
- CURLINFO_HTTP_CODE,
- &request->http_code);
- request->slot = NULL;
-
- /* Use alternates if necessary */
- if (request->http_code == 404 &&
- request->repo->next != NULL) {
- request->repo = request->repo->next;
- start_request(request);
- } else {
- finish_request(request);
- request->state = COMPLETE;
- }
- }
- } else {
- fprintf(stderr, "Unknown CURL message received: %d\n",
- (int)curl_message->msg);
- }
- curl_message = curl_multi_info_read(curlm, &num_messages);
- }
-}
-
-void process_request_queue(void)
-{
- struct transfer_request *request = request_queue_head;
- struct active_request_slot *slot = active_queue_head;
- int num_transfers;
-
- while (active_requests < max_requests && request != NULL) {
- if (request->state == WAITING) {
- if (has_sha1_file(request->sha1))
- release_request(request);
- else
- start_request(request);
- curl_multi_perform(curlm, &num_transfers);
- }
- request = request->next;
- }
-
- while (slot != NULL) {
- if (!slot->in_use && slot->curl != NULL) {
- curl_easy_cleanup(slot->curl);
- slot->curl = NULL;
- }
- slot = slot->next;
- }
-}
-#endif
-
-void prefetch(unsigned char *sha1)
-{
- struct transfer_request *newreq;
- struct transfer_request *tail;
- char *filename = sha1_file_name(sha1);
-
- newreq = xmalloc(sizeof(*newreq));
- memcpy(newreq->sha1, sha1, 20);
- newreq->repo = alt;
- newreq->url = NULL;
- newreq->local = -1;
- newreq->state = WAITING;
- snprintf(newreq->filename, sizeof(newreq->filename), "%s", filename);
- snprintf(newreq->tmpfile, sizeof(newreq->tmpfile),
- "%s.temp", filename);
- newreq->next = NULL;
-
- if (request_queue_head == NULL) {
- request_queue_head = newreq;
- } else {
- tail = request_queue_head;
- while (tail->next != NULL) {
- tail = tail->next;
- }
- tail->next = newreq;
- }
-#ifdef USE_CURL_MULTI
- process_request_queue();
- process_curl_messages();
-#endif
-}
-
-static int fetch_index(struct alt_base *repo, unsigned char *sha1)
-{
- char *hex = sha1_to_hex(sha1);
- char *filename;
- char *url;
- char tmpfile[PATH_MAX];
- long prev_posn = 0;
- char range[RANGE_HEADER_SIZE];
- struct curl_slist *range_header = NULL;
-
- FILE *indexfile;
- struct active_request_slot *slot;
-
- if (has_pack_index(sha1))
- return 0;
-
- if (get_verbosely)
- fprintf(stderr, "Getting index for pack %s\n", hex);
-
- url = xmalloc(strlen(repo->base) + 64);
- sprintf(url, "%s/objects/pack/pack-%s.idx", repo->base, hex);
-
- filename = sha1_pack_index_name(sha1);
- snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
- indexfile = fopen(tmpfile, "a");
- if (!indexfile)
- return error("Unable to open local file %s for pack index",
- filename);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
- slot->local = indexfile;
-
- /* If there is data present from a previous transfer attempt,
- resume where it left off */
- prev_posn = ftell(indexfile);
- if (prev_posn>0) {
- if (get_verbosely)
- fprintf(stderr,
- "Resuming fetch of index for pack %s at byte %ld\n",
- hex, prev_posn);
- sprintf(range, "Range: bytes=%ld-", prev_posn);
- range_header = curl_slist_append(range_header, range);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
- }
-
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK) {
- fclose(indexfile);
- return error("Unable to get pack index %s\n%s", url,
- curl_errorstr);
- }
- } else {
- return error("Unable to start request");
- }
-
- fclose(indexfile);
-
- return move_temp_to_file(tmpfile, filename);
-}
-
-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;
- struct alt_base *tail = alt;
- static const char null_byte = '\0';
-
- struct active_request_slot *slot;
-
- data = xmalloc(4096);
- buffer.size = 4096;
- 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);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
- fwrite_buffer_dynamic);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK || !buffer.posn) {
- http_specific = 0;
-
- sprintf(url, "%s/objects/info/alternates", base);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
- fwrite_buffer_dynamic);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK) {
- free(buffer.buffer);
- return 0;
- }
- }
- }
- } else {
- free(buffer.buffer);
- return 0;
- }
-
- fwrite_buffer_dynamic(&null_byte, 1, 1, &buffer);
- buffer.posn--;
- data = buffer.buffer;
-
- 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 = NULL;
- newalt->base = target;
- newalt->got_indices = 0;
- newalt->packs = NULL;
- while (tail->next != NULL)
- tail = tail->next;
- tail->next = newalt;
- ret++;
- }
- }
- i = posn + 1;
- }
-
- free(buffer.buffer);
- return ret;
-}
-
-static int fetch_indices(struct alt_base *repo)
-{
- unsigned char sha1[20];
- char *url;
- struct buffer buffer;
- char *data;
- int i = 0;
-
- struct active_request_slot *slot;
-
- 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);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
- fwrite_buffer_dynamic);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK) {
- free(buffer.buffer);
- return error("%s", curl_errorstr);
- }
- } else {
- free(buffer.buffer);
- return error("Unable to start request");
- }
-
- data = buffer.buffer;
- 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++;
- }
-
- free(buffer.buffer);
- 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;
- char tmpfile[PATH_MAX];
- int ret;
- long prev_posn = 0;
- char range[RANGE_HEADER_SIZE];
- struct curl_slist *range_header = NULL;
-
- struct active_request_slot *slot;
-
- 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);
- snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
- packfile = fopen(tmpfile, "a");
- if (!packfile)
- return error("Unable to open local file %s for pack",
- filename);
-
- slot = get_active_slot();
- curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
- curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
- curl_easy_setopt(slot->curl, CURLOPT_URL, url);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
- slot->local = packfile;
-
- /* If there is data present from a previous transfer attempt,
- resume where it left off */
- prev_posn = ftell(packfile);
- if (prev_posn>0) {
- if (get_verbosely)
- fprintf(stderr,
- "Resuming fetch of pack %s at byte %ld\n",
- sha1_to_hex(target->sha1), prev_posn);
- sprintf(range, "Range: bytes=%ld-", prev_posn);
- range_header = curl_slist_append(range_header, range);
- curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
- }
-
- if (start_active_slot(slot)) {
- run_active_slot(slot);
- if (slot->curl_result != CURLE_OK) {
- fclose(packfile);
- return error("Unable to get pack file %s\n%s", url,
- curl_errorstr);
- }
- } else {
- return error("Unable to start request");
- }
-
- fclose(packfile);
-
- ret = move_temp_to_file(tmpfile, filename);
- if (ret)
- return ret;
-
- lst = &repo->packs;
- while (*lst != target)
- lst = &((*lst)->next);
- *lst = (*lst)->next;
-
- if (verify_pack(target, 0))
- return -1;
- install_packed_git(target);
-
- return 0;
-}
-
-static int fetch_object(struct alt_base *repo, unsigned char *sha1)
-{
- char *hex = sha1_to_hex(sha1);
- int ret;
- struct transfer_request *request = request_queue_head;
-
- while (request != NULL && memcmp(request->sha1, sha1, 20))
- request = request->next;
- if (request == NULL)
- return error("Couldn't find request for %s in the queue", hex);
-
- if (has_sha1_file(request->sha1)) {
- release_request(request);
- return 0;
- }
-
-#ifdef USE_CURL_MULTI
- while (request->state == WAITING) {
- int num_transfers;
- curl_multi_perform(curlm, &num_transfers);
- if (num_transfers < active_requests) {
- process_curl_messages();
- process_request_queue();
- }
- }
-#else
- start_request(request);
-#endif
-
- while (request->state == ACTIVE) {
- run_active_slot(request->slot);
-#ifndef USE_CURL_MULTI
- request->curl_result = request->slot->curl_result;
- curl_easy_getinfo(request->slot->curl,
- CURLINFO_HTTP_CODE,
- &request->http_code);
- request->slot = NULL;
-
- /* Use alternates if necessary */
- if (request->http_code == 404 &&
- request->repo->next != NULL) {
- request->repo = request->repo->next;
- start_request(request);
- } else {
- finish_request(request);
- request->state = COMPLETE;
- }
-#endif
- }
-
- if (request->state == ABORTED) {
- release_request(request);
- return error("Request for %s aborted", hex);
- }
-
- if (request->curl_result != CURLE_OK && request->http_code != 416) {
- ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
- request->errorstr, request->curl_result,
- request->http_code, hex);
- release_request(request);
- return ret;
- }
-
- if (request->zret != Z_STREAM_END) {
- ret = error("File %s (%s) corrupt\n", hex, request->url);
- release_request(request);
- return ret;
- }
-
- if (memcmp(request->sha1, request->real_sha1, 20)) {
- release_request(request);
- return error("File %s has bad hash\n", hex);
- }
-
- if (request->rename < 0) {
- ret = error("unable to write sha1 filename %s: %s",
- request->filename,
- strerror(request->rename));
- release_request(request);
- return ret;
- }
-
- release_request(request);
- return 0;
-}
-
-int fetch(unsigned char *sha1)
-{
- struct alt_base *altbase = alt;
-
- if (!fetch_object(altbase, sha1))
- return 0;
- while (altbase) {
- if (!fetch_pack(altbase, sha1))
- return 0;
- altbase = altbase->next;
- }
- return error("Unable to find %s under %s\n", sha1_to_hex(sha1),
- alt->base);
-}
-
-static inline int needs_quote(int ch)
-{
- switch (ch) {
- case '/': case '-': case '.':
- case 'A'...'Z': case 'a'...'z': case '0'...'9':
- return 0;
- default:
- 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)
-{
- const char *cp;
- char *dp, *qref;
- int len, baselen, ch;
-
- baselen = strlen(base);
- len = baselen + 6; /* "refs/" + NUL */
- for (cp = ref; (ch = *cp) != 0; cp++, len++)
- if (needs_quote(ch))
- len += 2; /* extra two hex plus replacement % */
- qref = xmalloc(len);
- memcpy(qref, base, baselen);
- memcpy(qref + baselen, "refs/", 5);
- for (cp = ref, dp = qref + baselen + 5; (ch = *cp) != 0; cp++) {
- if (needs_quote(ch)) {
- *dp++ = '%';
- *dp++ = hex((ch >> 4) & 0xF);
- *dp++ = hex(ch & 0xF);
- }
- else
- *dp++ = ch;
- }
- *dp = 0;
-
- return qref;
-}
-
-int fetch_ref(char *ref, unsigned char *sha1)
-{
- char *url;
- char hex[42];
- struct buffer buffer;
- char *base = alt->base;
- struct active_request_slot *slot;
- buffer.size = 41;
- buffer.posn = 0;
- buffer.buffer = hex;
- hex[41] = '\0';
-
- url = quote_ref_url(base, ref);
- slot = get_active_slot();
- 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 (slot->curl_result != CURLE_OK)
- return error("Couldn't get %s for %s\n%s",
- url, ref, curl_errorstr);
- } else {
- return error("Unable to start request");
- }
-
- hex[40] = '\0';
- get_sha1_hex(hex, sha1);
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- char *commit_id;
- char *url;
+#include "exec_cmd.h"
+#include "walker.h"
+
+static const char http_fetch_usage[] = "git http-fetch "
+"[-c] [-t] [-a] [-v] [--recover] [-w ref] [--stdin] commit-id url";
+
+int main(int argc, const char **argv)
+{
+ const char *prefix;
+ struct walker *walker;
+ int commits_on_stdin = 0;
+ int commits;
+ const char **write_ref = NULL;
+ char **commit_id;
+ const char *url;
+ char *rewritten_url = NULL;
int arg = 1;
- struct active_request_slot *slot;
- char *low_speed_limit;
- char *low_speed_time;
+ int rc = 0;
+ int get_tree = 0;
+ int get_history = 0;
+ int get_all = 0;
+ int get_verbosely = 0;
+ int get_recover = 0;
+
+ git_extract_argv0_path(argv[0]);
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't') {
} else if (argv[arg][1] == 'v') {
get_verbosely = 1;
} else if (argv[arg][1] == 'w') {
- write_ref = argv[arg + 1];
+ write_ref = &argv[arg + 1];
arg++;
+ } else if (argv[arg][1] == 'h') {
+ usage(http_fetch_usage);
} else if (!strcmp(argv[arg], "--recover")) {
get_recover = 1;
+ } else if (!strcmp(argv[arg], "--stdin")) {
+ commits_on_stdin = 1;
}
arg++;
}
- if (argc < arg + 2) {
- usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
- return 1;
+ if (argc != arg + 2 - commits_on_stdin)
+ usage(http_fetch_usage);
+ if (commits_on_stdin) {
+ commits = walker_targets_stdin(&commit_id, &write_ref);
+ } else {
+ commit_id = (char **) &argv[arg++];
+ commits = 1;
}
- commit_id = argv[arg];
- url = argv[arg + 1];
+ url = argv[arg];
- curl_global_init(CURL_GLOBAL_ALL);
+ prefix = setup_git_directory();
-#ifdef USE_CURL_MULTI
- {
- char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
- if (http_max_requests != NULL)
- max_requests = atoi(http_max_requests);
- }
+ git_config(git_default_config, NULL);
- curlm = curl_multi_init();
- if (curlm == NULL) {
- fprintf(stderr, "Error creating curl multi handle.\n");
- return 1;
+ if (url && url[strlen(url)-1] != '/') {
+ rewritten_url = xmalloc(strlen(url)+2);
+ strcpy(rewritten_url, url);
+ strcat(rewritten_url, "/");
+ url = rewritten_url;
}
-#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);
+ walker = get_http_walker(url, NULL);
+ walker->get_tree = get_tree;
+ walker->get_history = get_history;
+ walker->get_all = get_all;
+ walker->get_verbosely = get_verbosely;
+ walker->get_recover = get_recover;
- git_config(http_options);
+ rc = walker_fetch(walker, commits, commit_id, write_ref, url);
- if (curl_ssl_verify == -1)
- curl_ssl_verify = 1;
+ if (commits_on_stdin)
+ walker_targets_free(commits, commit_id, write_ref);
-#ifdef USE_CURL_MULTI
- if (max_requests < 1)
- max_requests = DEFAULT_MAX_REQUESTS;
-#endif
-
- pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
- no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
- no_range_header = curl_slist_append(no_range_header, "Range:");
-
-#ifndef NO_CURL_EASY_DUPHANDLE
- curl_default = get_curl_handle();
-#endif
+ if (walker->corrupt_object_found) {
+ fprintf(stderr,
+"Some loose object were found to be corrupt, but they might be just\n"
+"a false '404 Not Found' error message sent with incorrect HTTP\n"
+"status code. Suggest running 'git fsck'.\n");
+ }
- alt = xmalloc(sizeof(*alt));
- alt->base = url;
- alt->got_indices = 0;
- alt->packs = NULL;
- alt->next = NULL;
- fetch_alternates(alt->base);
+ walker_free(walker);
- if (pull(commit_id))
- return 1;
+ free(rewritten_url);
- curl_slist_free_all(pragma_header);
- curl_slist_free_all(no_pragma_header);
- curl_slist_free_all(no_range_header);
-#ifndef NO_CURL_EASY_DUPHANDLE
- curl_easy_cleanup(curl_default);
-#endif
- slot = active_queue_head;
- while (slot != NULL) {
- if (slot->curl != NULL)
- curl_easy_cleanup(slot->curl);
- slot = slot->next;
- }
-#ifdef USE_CURL_MULTI
- curl_multi_cleanup(curlm);
-#endif
- curl_global_cleanup();
- return 0;
+ return rc;
}