diff options
| -rw-r--r-- | http-push.c | 213 | ||||
| -rw-r--r-- | http-walker.c | 267 | ||||
| -rw-r--r-- | http.c | 250 | ||||
| -rw-r--r-- | http.h | 37 |
4 files changed, 336 insertions, 431 deletions
diff --git a/http-push.c b/http-push.c index 8232cf488e..3439dcc5b8 100644 --- a/http-push.c +++ b/http-push.c @@ -115,18 +115,10 @@ struct transfer_request struct remote_lock *lock; struct curl_slist *headers; struct buffer buffer; - char filename[PATH_MAX]; - char tmpfile[PATH_MAX]; - int local_fileno; enum transfer_state state; CURLcode curl_result; char errorstr[CURL_ERROR_SIZE]; long http_code; - unsigned char real_sha1[20]; - git_SHA_CTX c; - z_stream stream; - int zret; - int rename; void *userData; struct active_request_slot *slot; struct transfer_request *next; @@ -232,15 +224,6 @@ static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum d return dav_headers; } -static void append_remote_object_url(struct strbuf *buf, const char *url, - const char *hex, - int only_two_digit_prefix) -{ - strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex); - if (!only_two_digit_prefix) - strbuf_addf(buf, "%s", hex+2); -} - static void finish_request(struct transfer_request *request); static void release_request(struct transfer_request *request); @@ -254,169 +237,29 @@ static void process_response(void *callback_data) #ifdef USE_CURL_MULTI -static char *get_remote_object_url(const char *url, const char *hex, - int only_two_digit_prefix) -{ - struct strbuf buf = STRBUF_INIT; - append_remote_object_url(&buf, url, hex, only_two_digit_prefix); - return strbuf_detach(&buf, NULL); -} - -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 = xwrite(request->local_fileno, - (char *) 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 = git_inflate(&request->stream, Z_SYNC_FLUSH); - git_SHA1_Update(&request->c, expn, - sizeof(expn) - request->stream.avail_out); - } while (request->stream.avail_in && request->zret == Z_OK); - data_received++; - return size; -} - static void start_fetch_loose(struct transfer_request *request) { - char *hex = sha1_to_hex(request->obj->sha1); - char *filename; - char prevfile[PATH_MAX]; - char *url; - 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; + struct http_object_request *obj_req; - filename = sha1_file_name(request->obj->sha1); - snprintf(request->filename, sizeof(request->filename), "%s", filename); - snprintf(request->tmpfile, sizeof(request->tmpfile), - "%s.temp", filename); - - snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename); - unlink_or_warn(prevfile); - rename(request->tmpfile, prevfile); - unlink_or_warn(request->tmpfile); - - if (request->local_fileno != -1) - error("fd leakage in start: %d", request->local_fileno); - request->local_fileno = 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_fileno < 0 && errno == ENOENT) { - char *dir = strrchr(request->tmpfile, '/'); - if (dir) { - *dir = 0; - mkdir(request->tmpfile, 0777); - *dir = '/'; - } - request->local_fileno = open(request->tmpfile, - O_WRONLY | O_CREAT | O_EXCL, 0666); - } - - if (request->local_fileno < 0) { + obj_req = new_http_object_request(repo->url, request->obj->sha1); + if (obj_req == NULL) { request->state = ABORTED; - error("Couldn't create temporary file %s for %s: %s", - request->tmpfile, request->filename, strerror(errno)); return; } - memset(&request->stream, 0, sizeof(request->stream)); - - git_inflate_init(&request->stream); - - git_SHA1_Init(&request->c); - - url = get_remote_object_url(repo->url, hex, 0); - request->url = xstrdup(url); - - /* - * If a previous temp file is present, process what was already - * fetched. - */ - prevlocal = open(prevfile, O_RDONLY); - if (prevlocal != -1) { - do { - prev_read = xread(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_or_warn(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)); - git_inflate_init(&request->stream); - git_SHA1_Init(&request->c); - if (prev_posn>0) { - prev_posn = 0; - lseek(request->local_fileno, 0, SEEK_SET); - ftruncate(request->local_fileno, 0); - } - } - - slot = get_active_slot(); + slot = obj_req->slot; slot->callback_func = process_response; slot->callback_data = request; request->slot = 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 (push_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); - } + request->userData = obj_req; /* Try to get the request started, abort the request on error */ request->state = RUN_FETCH_LOOSE; if (!start_active_slot(slot)) { fprintf(stderr, "Unable to start GET request\n"); repo->can_update_info_refs = 0; + release_http_object_request(obj_req); release_request(request); } } @@ -675,16 +518,14 @@ static void release_request(struct transfer_request *request) entry->next = entry->next->next; } - if (request->local_fileno != -1) - close(request->local_fileno); free(request->url); free(request); } static void finish_request(struct transfer_request *request) { - struct stat st; struct http_pack_request *preq; + struct http_object_request *obj_req; request->curl_result = request->slot->curl_result; request->http_code = request->slot->http_code; @@ -739,39 +580,17 @@ static void finish_request(struct transfer_request *request) aborted = 1; } } else if (request->state == RUN_FETCH_LOOSE) { - close(request->local_fileno); - request->local_fileno = -1; - - if (request->curl_result != CURLE_OK && - request->http_code != 416) { - if (stat(request->tmpfile, &st) == 0) { - if (st.st_size == 0) - unlink_or_warn(request->tmpfile); - } - } else { - if (request->http_code == 416) - warning("requested range invalid; we may already have all the data."); - - git_inflate_end(&request->stream); - git_SHA1_Final(request->real_sha1, &request->c); - if (request->zret != Z_STREAM_END) { - unlink_or_warn(request->tmpfile); - } else if (hashcmp(request->obj->sha1, request->real_sha1)) { - unlink_or_warn(request->tmpfile); - } else { - request->rename = - move_temp_to_file( - request->tmpfile, - request->filename); - if (request->rename == 0) - request->obj->flags |= (LOCAL | REMOTE); - } - } + obj_req = (struct http_object_request *)request->userData; + + if (finish_http_object_request(obj_req) == 0) + if (obj_req->rename == 0) + request->obj->flags |= (LOCAL | REMOTE); /* Try fetching packed if necessary */ - if (request->obj->flags & LOCAL) + if (request->obj->flags & LOCAL) { + release_http_object_request(obj_req); release_request(request); - else + } else start_fetch_packed(request); } else if (request->state == RUN_FETCH_PACKED) { @@ -843,7 +662,6 @@ static void add_fetch_request(struct object *obj) request->url = NULL; request->lock = NULL; request->headers = NULL; - request->local_fileno = -1; request->state = NEED_FETCH; request->next = request_queue_head; request_queue_head = request; @@ -882,7 +700,6 @@ static int add_send_request(struct object *obj, struct remote_lock *lock) request->url = NULL; request->lock = lock; request->headers = NULL; - request->local_fileno = -1; request->state = NEED_PUSH; request->next = request_queue_head; request_queue_head = request; diff --git a/http-walker.c b/http-walker.c index 8f7a975f96..700bc13112 100644 --- a/http-walker.c +++ b/http-walker.c @@ -3,8 +3,6 @@ #include "walker.h" #include "http.h" -#define PREV_BUF_SIZE 4096 - struct alt_base { char *base; @@ -25,20 +23,8 @@ struct object_request struct walker *walker; unsigned char sha1[20]; struct alt_base *repo; - char *url; - char filename[PATH_MAX]; - char tmpfile[PATH_MAX]; - int local; enum object_request_state state; - CURLcode curl_result; - char errorstr[CURL_ERROR_SIZE]; - long http_code; - unsigned char real_sha1[20]; - git_SHA_CTX c; - z_stream stream; - int zret; - int rename; - struct active_request_slot *slot; + struct http_object_request *req; struct object_request *next; }; @@ -59,34 +45,6 @@ struct walker_data { static struct object_request *object_queue_head; -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 object_request *obj_req = (struct object_request *)data; - do { - ssize_t retval = xwrite(obj_req->local, - (char *) ptr + posn, size - posn); - if (retval < 0) - return posn; - posn += retval; - } while (posn < size); - - obj_req->stream.avail_in = size; - obj_req->stream.next_in = ptr; - do { - obj_req->stream.next_out = expn; - obj_req->stream.avail_out = sizeof(expn); - obj_req->zret = git_inflate(&obj_req->stream, Z_SYNC_FLUSH); - git_SHA1_Update(&obj_req->c, expn, - sizeof(expn) - obj_req->stream.avail_out); - } while (obj_req->stream.avail_in && obj_req->zret == Z_OK); - data_received++; - return size; -} - static void fetch_alternates(struct walker *walker, const char *base); static void process_object_response(void *callback_data); @@ -94,172 +52,35 @@ static void process_object_response(void *callback_data); static void start_object_request(struct walker *walker, struct object_request *obj_req) { - char *hex = sha1_to_hex(obj_req->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; + struct http_object_request *req; - snprintf(prevfile, sizeof(prevfile), "%s.prev", obj_req->filename); - unlink_or_warn(prevfile); - rename(obj_req->tmpfile, prevfile); - unlink_or_warn(obj_req->tmpfile); - - if (obj_req->local != -1) - error("fd leakage in start: %d", obj_req->local); - obj_req->local = open(obj_req->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 (obj_req->local < 0 && errno == ENOENT) { - char *dir = strrchr(obj_req->tmpfile, '/'); - if (dir) { - *dir = 0; - mkdir(obj_req->tmpfile, 0777); - *dir = '/'; - } - obj_req->local = open(obj_req->tmpfile, - O_WRONLY | O_CREAT | O_EXCL, 0666); - } - - if (obj_req->local < 0) { + req = new_http_object_request(obj_req->repo->base, obj_req->sha1); + if (req == NULL) { obj_req->state = ABORTED; - error("Couldn't create temporary file %s for %s: %s", - obj_req->tmpfile, obj_req->filename, strerror(errno)); return; } + obj_req->req = req; - memset(&obj_req->stream, 0, sizeof(obj_req->stream)); - - git_inflate_init(&obj_req->stream); - - git_SHA1_Init(&obj_req->c); - - url = xmalloc(strlen(obj_req->repo->base) + 51); - obj_req->url = xmalloc(strlen(obj_req->repo->base) + 51); - strcpy(url, obj_req->repo->base); - posn = url + strlen(obj_req->repo->base); - strcpy(posn, "/objects/"); - posn += 9; - memcpy(posn, hex, 2); - posn += 2; - *(posn++) = '/'; - strcpy(posn, hex + 2); - strcpy(obj_req->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 = xread(prevlocal, prev_buf, PREV_BUF_SIZE); - if (prev_read>0) { - if (fwrite_sha1_file(prev_buf, - 1, - prev_read, - obj_req) == prev_read) - prev_posn += prev_read; - else - prev_read = -1; - } - } while (prev_read > 0); - close(prevlocal); - } - unlink_or_warn(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(&obj_req->stream, 0, sizeof(obj_req->stream)); - git_inflate_init(&obj_req->stream); - git_SHA1_Init(&obj_req->c); - if (prev_posn>0) { - prev_posn = 0; - lseek(obj_req->local, 0, SEEK_SET); - ftruncate(obj_req->local, 0); - } - } - - slot = get_active_slot(); + slot = req->slot; slot->callback_func = process_object_response; slot->callback_data = obj_req; - obj_req->slot = slot; - - curl_easy_setopt(slot->curl, CURLOPT_FILE, obj_req); - curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); - curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, obj_req->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 (walker->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 */ obj_req->state = ACTIVE; if (!start_active_slot(slot)) { obj_req->state = ABORTED; - obj_req->slot = NULL; - close(obj_req->local); - obj_req->local = -1; - free(obj_req->url); + release_http_object_request(req); return; } } static void finish_object_request(struct object_request *obj_req) { - struct stat st; - - close(obj_req->local); - obj_req->local = -1; - - if (obj_req->http_code == 416) { - fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); - } else if (obj_req->curl_result != CURLE_OK) { - if (stat(obj_req->tmpfile, &st) == 0) - if (st.st_size == 0) - unlink_or_warn(obj_req->tmpfile); + if (finish_http_object_request(obj_req->req)) return; - } - - git_inflate_end(&obj_req->stream); - git_SHA1_Final(obj_req->real_sha1, &obj_req->c); - if (obj_req->zret != Z_STREAM_END) { - unlink_or_warn(obj_req->tmpfile); - return; - } - if (hashcmp(obj_req->sha1, obj_req->real_sha1)) { - unlink_or_warn(obj_req->tmpfile); - return; - } - obj_req->rename = - move_temp_to_file(obj_req->tmpfile, obj_req->filename); - if (obj_req->rename == 0) + if (obj_req->req->rename == 0) walker_say(obj_req->walker, "got %s\n", sha1_to_hex(obj_req->sha1)); } @@ -271,19 +92,16 @@ static void process_object_response(void *callback_data) struct walker_data *data = walker->data; struct alt_base *alt = data->alt; - obj_req->curl_result = obj_req->slot->curl_result; - obj_req->http_code = obj_req->slot->http_code; - obj_req->slot = NULL; + process_http_object_request(obj_req->req); obj_req->state = COMPLETE; /* Use alternates if necessary */ - if (missing_target(obj_req)) { + if (missing_target(obj_req->req)) { fetch_alternates(walker, alt->base); if (obj_req->repo->next != NULL) { obj_req->repo = obj_req->repo->next; - close(obj_req->local); - obj_req->local = -1; + release_http_object_request(obj_req->req); start_object_request(walker, obj_req); return; } @@ -296,8 +114,8 @@ static void release_object_request(struct object_request *obj_req) { struct object_request *entry = object_queue_head; - if (obj_req->local != -1) - error("fd leakage in release: %d", obj_req->local); + if (obj_req->req !=NULL && obj_req->req->localfile != -1) + error("fd leakage in release: %d", obj_req->req->localfile); if (obj_req == object_queue_head) { object_queue_head = obj_req->next; } else { @@ -307,7 +125,6 @@ static void release_object_request(struct object_request *obj_req) entry->next = entry->next->next; } - free(obj_req->url); free(obj_req); } @@ -335,19 +152,13 @@ static void prefetch(struct walker *walker, unsigned char *sha1) struct object_request *newreq; struct object_request *tail; struct walker_data *data = walker->data; - char *filename = sha1_file_name(sha1); newreq = xmalloc(sizeof(*newreq)); newreq->walker = walker; hashcpy(newreq->sha1, sha1); newreq->repo = data->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->slot = NULL; + newreq->req = NULL; newreq->next = NULL; http_is_verbose = walker->get_verbosely; @@ -638,15 +449,6 @@ abort: static void abort_object_request(struct object_request *obj_req) { - if (obj_req->local >= 0) { - close(obj_req->local); - obj_req->local = -1; - } - unlink_or_warn(obj_req->tmpfile); - if (obj_req->slot) { - release_active_slot(obj_req->slot); - obj_req->slot = NULL; - } release_object_request(obj_req); } @@ -655,6 +457,7 @@ static int fetch_object(struct walker *walker, struct alt_base *repo, unsigned c char *hex = sha1_to_hex(sha1); int ret = 0; struct object_request *obj_req = object_queue_head; + struct http_object_request *req; while (obj_req != NULL && hashcmp(obj_req->sha1, sha1)) obj_req = obj_req->next; @@ -662,6 +465,8 @@ static int fetch_object(struct walker *walker, struct alt_base *repo, unsigned c return error("Couldn't find request for %s in the queue", hex); if (has_sha1_file(obj_req->sha1)) { + if (obj_req->req != NULL) + abort_http_object_request(obj_req->req); abort_object_request(obj_req); return 0; } @@ -673,34 +478,42 @@ static int fetch_object(struct walker *walker, struct alt_base *repo, unsigned c start_object_request(walker, obj_req); #endif + /* + * obj_req->req might change when fetching alternates in the callback + * process_object_response; therefore, the "shortcut" variable, req, + * is used only after we're done with slots. + */ while (obj_req->state == ACTIVE) - run_active_slot(obj_req->slot); + run_active_slot(obj_req->req->slot); + + req = obj_req->req; - if (obj_req->local != -1) { - close(obj_req->local); - obj_req->local = -1; + if (req->localfile != -1) { + close(req->localfile); + req->localfile = -1; } if (obj_req->state == ABORTED) { ret = error("Request for %s aborted", hex); - } else if (obj_req->curl_result != CURLE_OK && - obj_req->http_code != 416) { - if (missing_target(obj_req)) + } else if (req->curl_result != CURLE_OK && + req->http_code != 416) { + if (missing_target(req)) ret = -1; /* Be silent, it is probably in a pack. */ else ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)", - obj_req->errorstr, obj_req->curl_result, - obj_req->http_code, hex); - } else if (obj_req->zret != Z_STREAM_END) { + req->errorstr, req->curl_result, + req->http_code, hex); + } else if (req->zret != Z_STREAM_END) { walker->corrupt_object_found++; - ret = error("File %s (%s) corrupt", hex, obj_req->url); - } else if (hashcmp(obj_req->sha1, obj_req->real_sha1)) { + ret = error("File %s (%s) corrupt", hex, req->url); + } else if (hashcmp(obj_req->sha1, req->real_sha1)) { ret = error("File %s has bad hash", hex); - } else if (obj_req->rename < 0) { + } else if (req->rename < 0) { ret = error("unable to write sha1 filename %s", - obj_req->filename); + req->filename); } + release_http_object_request(req); release_object_request(obj_req); return ret; } @@ -12,6 +12,10 @@ static CURLM *curlm; #ifndef NO_CURL_EASY_DUPHANDLE static CURL *curl_default; #endif + +#define PREV_BUF_SIZE 4096 +#define RANGE_HEADER_SIZE 30 + char curl_errorstr[CURL_ERROR_SIZE]; static int curl_ssl_verify = -1; @@ -30,8 +34,7 @@ static const char *curl_http_proxy; static char *user_name, *user_pass; static struct curl_slist *pragma_header; - -struct curl_slist *no_pragma_header; +static struct curl_slist *no_pragma_header; static struct active_request_slot *active_queue_head; @@ -666,6 +669,23 @@ static char *quote_ref_url(const char *base, const char *ref) return strbuf_detach(&buf, NULL); } +void append_remote_object_url(struct strbuf *buf, const char *url, + const char *hex, + int only_two_digit_prefix) +{ + strbuf_addf(buf, "%s/objects/%.*s/", url, 2, hex); + if (!only_two_digit_prefix) + strbuf_addf(buf, "%s", hex+2); +} + +char *get_remote_object_url(const char *url, const char *hex, + int only_two_digit_prefix) +{ + struct strbuf buf = STRBUF_INIT; + append_remote_object_url(&buf, url, hex, only_two_digit_prefix); + return strbuf_detach(&buf, NULL); +} + /* http_request() targets */ #define HTTP_REQUEST_STRBUF 0 #define HTTP_REQUEST_FILE 1 @@ -995,3 +1015,229 @@ abort: free(filename); return NULL; } + +/* Helpers for fetching objects (loose) */ +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 http_object_request *freq = + (struct http_object_request *)data; + do { + ssize_t retval = xwrite(freq->localfile, + (char *) ptr + posn, size - posn); + if (retval < 0) + return posn; + posn += retval; + } while (posn < size); + + freq->stream.avail_in = size; + freq->stream.next_in = ptr; + do { + freq->stream.next_out = expn; + freq->stream.avail_out = sizeof(expn); + freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH); + git_SHA1_Update(&freq->c, expn, + sizeof(expn) - freq->stream.avail_out); + } while (freq->stream.avail_in && freq->zret == Z_OK); + data_received++; + return size; +} + +struct http_object_request *new_http_object_request(const char *base_url, + unsigned char *sha1) +{ + char *hex = sha1_to_hex(sha1); + char *filename; + char prevfile[PATH_MAX]; + char *url; + 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 http_object_request *freq; + + freq = xmalloc(sizeof(*freq)); + hashcpy(freq->sha1, sha1); + freq->localfile = -1; + + filename = sha1_file_name(sha1); + snprintf(freq->filename, sizeof(freq->filename), "%s", filename); + snprintf(freq->tmpfile, sizeof(freq->tmpfile), + "%s.temp", filename); + + snprintf(prevfile, sizeof(prevfile), "%s.prev", filename); + unlink_or_warn(prevfile); + rename(freq->tmpfile, prevfile); + unlink_or_warn(freq->tmpfile); + + if (freq->localfile != -1) + error("fd leakage in start: %d", freq->localfile); + freq->localfile = open(freq->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 (freq->localfile < 0 && errno == ENOENT) { + char *dir = strrchr(freq->tmpfile, '/'); + if (dir) { + *dir = 0; + mkdir(freq->tmpfile, 0777); + *dir = '/'; + } + freq->localfile = open(freq->tmpfile, + O_WRONLY | O_CREAT | O_EXCL, 0666); + } + + if (freq->localfile < 0) { + error("Couldn't create temporary file %s for %s: %s", + freq->tmpfile, freq->filename, strerror(errno)); + goto abort; + } + + memset(&freq->stream, 0, sizeof(freq->stream)); + + git_inflate_init(&freq->stream); + + git_SHA1_Init(&freq->c); + + url = get_remote_object_url(base_url, hex, 0); + freq->url = xstrdup(url); + + /* + * If a previous temp file is present, process what was already + * fetched. + */ + prevlocal = open(prevfile, O_RDONLY); + if (prevlocal != -1) { + do { + prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); + if (prev_read>0) { + if (fwrite_sha1_file(prev_buf, + 1, + prev_read, + freq) == prev_read) { + prev_posn += prev_read; + } else { + prev_read = -1; + } + } + } while (prev_read > 0); + close(prevlocal); + } + unlink_or_warn(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(&freq->stream, 0, sizeof(freq->stream)); + git_inflate_init(&freq->stream); + git_SHA1_Init(&freq->c); + if (prev_posn>0) { + prev_posn = 0; + lseek(freq->localfile, 0, SEEK_SET); + ftruncate(freq->localfile, 0); + } + } + + freq->slot = get_active_slot(); + + curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); + curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); + curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); + curl_easy_setopt(freq->slot->curl, CURLOPT_URL, url); + curl_easy_setopt(freq->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 (http_is_verbose) + 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(freq->slot->curl, + CURLOPT_HTTPHEADER, range_header); + } + + return freq; + + free(url); +abort: + free(filename); + free(freq); + return NULL; +} + +void process_http_object_request(struct http_object_request *freq) +{ + if (freq->slot == NULL) + return; + freq->curl_result = freq->slot->curl_result; + freq->http_code = freq->slot->http_code; + freq->slot = NULL; +} + +int finish_http_object_request(struct http_object_request *freq) +{ + struct stat st; + + close(freq->localfile); + freq->localfile = -1; + + process_http_object_request(freq); + + if (freq->http_code == 416) { + fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); + } else if (freq->curl_result != CURLE_OK) { + if (stat(freq->tmpfile, &st) == 0) + if (st.st_size == 0) + unlink_or_warn(freq->tmpfile); + return -1; + } + + git_inflate_end(&freq->stream); + git_SHA1_Final(freq->real_sha1, &freq->c); + if (freq->zret != Z_STREAM_END) { + unlink_or_warn(freq->tmpfile); + return -1; + } + if (hashcmp(freq->sha1, freq->real_sha1)) { + unlink_or_warn(freq->tmpfile); + return -1; + } + freq->rename = + move_temp_to_file(freq->tmpfile, freq->filename); + + return freq->rename; +} + +void abort_http_object_request(struct http_object_request *freq) +{ + unlink_or_warn(freq->tmpfile); + + release_http_object_request(freq); +} + +void release_http_object_request(struct http_object_request *freq) +{ + if (freq->localfile != -1) { + close(freq->localfile); + freq->localfile = -1; + } + if (freq->url != NULL) { + free(freq->url); + freq->url = NULL; + } + freq->slot = NULL; +} @@ -88,10 +88,6 @@ extern void add_fill_function(void *data, int (*fill)(void *)); extern void step_active_slots(void); #endif -extern struct curl_slist *no_pragma_header; - -#define RANGE_HEADER_SIZE 30 - extern void http_init(struct remote *remote); extern void http_cleanup(void); @@ -114,6 +110,13 @@ static inline int missing__target(int code, int result) #define missing_target(a) missing__target((a)->http_code, (a)->curl_result) +/* Helpers for modifying and creating URLs */ +extern void append_remote_object_url(struct strbuf *buf, const char *url, + const char *hex, + int only_two_digit_prefix); +extern char *get_remote_object_url(const char *url, const char *hex, + int only_two_digit_prefix); + /* Options for http_request_*() */ #define HTTP_NO_CACHE 1 @@ -167,4 +170,30 @@ extern struct http_pack_request *new_http_pack_request( extern int finish_http_pack_request(struct http_pack_request *preq); extern void release_http_pack_request(struct http_pack_request *preq); +/* Helpers for fetching object */ +struct http_object_request +{ + char *url; + char filename[PATH_MAX]; + char tmpfile[PATH_MAX]; + int localfile; + CURLcode curl_result; + char errorstr[CURL_ERROR_SIZE]; + long http_code; + unsigned char sha1[20]; + unsigned char real_sha1[20]; + git_SHA_CTX c; + z_stream stream; + int zret; + int rename; + struct active_request_slot *slot; +}; + +extern struct http_object_request *new_http_object_request( + const char *base_url, unsigned char *sha1); +extern void process_http_object_request(struct http_object_request *freq); +extern int finish_http_object_request(struct http_object_request *freq); +extern void abort_http_object_request(struct http_object_request *freq); +extern void release_http_object_request(struct http_object_request *freq); + #endif /* HTTP_H */ |