#include "http.h"
+#include "pack.h"
int data_received;
int active_requests;
+int http_is_verbose;
#ifdef USE_CURL_MULTI
static int max_requests = -1;
#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;
static const char *ssl_cert;
-#if LIBCURL_VERSION_NUM >= 0x070902
+#if LIBCURL_VERSION_NUM >= 0x070903
static const char *ssl_key;
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
static char *user_name, *user_pass;
static struct curl_slist *pragma_header;
+static struct curl_slist *no_pragma_header;
static struct active_request_slot *active_queue_head;
}
if (!strcmp("http.sslcert", var))
return git_config_string(&ssl_cert, var, value);
-#if LIBCURL_VERSION_NUM >= 0x070902
+#if LIBCURL_VERSION_NUM >= 0x070903
if (!strcmp("http.sslkey", var))
return git_config_string(&ssl_key, var, value);
#endif
if (ssl_cert != NULL)
curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
-#if LIBCURL_VERSION_NUM >= 0x070902
+#if LIBCURL_VERSION_NUM >= 0x070903
if (ssl_key != NULL)
curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
#endif
char *low_speed_limit;
char *low_speed_time;
+ http_is_verbose = 0;
+
git_config(http_options, NULL);
curl_global_init(CURL_GLOBAL_ALL);
curl_http_proxy = xstrdup(remote->http_proxy);
pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
+ no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
#ifdef USE_CURL_MULTI
{
curl_ssl_verify = 0;
set_from_env(&ssl_cert, "GIT_SSL_CERT");
-#if LIBCURL_VERSION_NUM >= 0x070902
+#if LIBCURL_VERSION_NUM >= 0x070903
set_from_env(&ssl_key, "GIT_SSL_KEY");
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
curl_slist_free_all(pragma_header);
pragma_header = NULL;
+ curl_slist_free_all(no_pragma_header);
+ no_pragma_header = NULL;
+
if (curl_http_proxy) {
free((void *)curl_http_proxy);
curl_http_proxy = NULL;
}
}
+/* Helpers for modifying and creating URLs */
static inline int needs_quote(int ch)
{
if (((ch >= 'A') && (ch <= 'Z'))
return 'A' + v - 10;
}
+static void end_url_with_slash(struct strbuf *buf, const char *url)
+{
+ strbuf_addstr(buf, url);
+ if (buf->len && buf->buf[buf->len - 1] != '/')
+ strbuf_addstr(buf, "/");
+}
+
static char *quote_ref_url(const char *base, const char *ref)
{
struct strbuf buf = STRBUF_INIT;
const char *cp;
int ch;
- strbuf_addstr(&buf, base);
- if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
- strbuf_addstr(&buf, "/");
+ end_url_with_slash(&buf, base);
for (cp = ref; (ch = *cp) != 0; cp++)
if (needs_quote(ch))
return strbuf_detach(&buf, NULL);
}
-int http_fetch_ref(const char *base, struct ref *ref)
+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
+
+static int http_request(const char *url, void *result, int target, int options)
{
- char *url;
- struct strbuf buffer = STRBUF_INIT;
struct active_request_slot *slot;
struct slot_results results;
+ struct curl_slist *headers = NULL;
+ struct strbuf buf = STRBUF_INIT;
int ret;
- url = quote_ref_url(base, ref->name);
slot = get_active_slot();
slot->results = &results;
- 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_HTTPGET, 1);
+
+ if (result == NULL) {
+ curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
+ } else {
+ curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
+ curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
+
+ if (target == HTTP_REQUEST_FILE) {
+ long posn = ftell(result);
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
+ fwrite);
+ if (posn > 0) {
+ strbuf_addf(&buf, "Range: bytes=%ld-", posn);
+ headers = curl_slist_append(headers, buf.buf);
+ strbuf_reset(&buf);
+ }
+ slot->local = result;
+ } else
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
+ fwrite_buffer);
+ }
+
+ strbuf_addstr(&buf, "Pragma:");
+ if (options & HTTP_NO_CACHE)
+ strbuf_addstr(&buf, " no-cache");
+
+ headers = curl_slist_append(headers, buf.buf);
+
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
+ curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
+
if (start_active_slot(slot)) {
run_active_slot(slot);
- if (results.curl_result == CURLE_OK) {
- strbuf_rtrim(&buffer);
- if (buffer.len == 40)
- ret = get_sha1_hex(buffer.buf, ref->old_sha1);
- else if (!prefixcmp(buffer.buf, "ref: ")) {
- ref->symref = xstrdup(buffer.buf + 5);
- ret = 0;
- } else
- ret = 1;
- } else {
- ret = error("Couldn't get %s for %s\n%s",
- url, ref->name, curl_errorstr);
- }
+ if (results.curl_result == CURLE_OK)
+ ret = HTTP_OK;
+ else if (missing_target(&results))
+ ret = HTTP_MISSING_TARGET;
+ else
+ ret = HTTP_ERROR;
} else {
- ret = error("Unable to start request");
+ error("Unable to start HTTP request for %s", url);
+ ret = HTTP_START_FAILED;
+ }
+
+ slot->local = NULL;
+ curl_slist_free_all(headers);
+ strbuf_release(&buf);
+
+ return ret;
+}
+
+int http_get_strbuf(const char *url, struct strbuf *result, int options)
+{
+ return http_request(url, result, HTTP_REQUEST_STRBUF, options);
+}
+
+int http_get_file(const char *url, const char *filename, int options)
+{
+ int ret;
+ struct strbuf tmpfile = STRBUF_INIT;
+ FILE *result;
+
+ strbuf_addf(&tmpfile, "%s.temp", filename);
+ result = fopen(tmpfile.buf, "a");
+ if (! result) {
+ error("Unable to open local file %s", tmpfile.buf);
+ ret = HTTP_ERROR;
+ goto cleanup;
+ }
+
+ ret = http_request(url, result, HTTP_REQUEST_FILE, options);
+ fclose(result);
+
+ if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
+ ret = HTTP_ERROR;
+cleanup:
+ strbuf_release(&tmpfile);
+ return ret;
+}
+
+int http_error(const char *url, int ret)
+{
+ /* http_request has already handled HTTP_START_FAILED. */
+ if (ret != HTTP_START_FAILED)
+ error("%s while accessing %s\n", curl_errorstr, url);
+
+ return ret;
+}
+
+int http_fetch_ref(const char *base, struct ref *ref)
+{
+ char *url;
+ struct strbuf buffer = STRBUF_INIT;
+ int ret = -1;
+
+ url = quote_ref_url(base, ref->name);
+ if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
+ strbuf_rtrim(&buffer);
+ if (buffer.len == 40)
+ ret = get_sha1_hex(buffer.buf, ref->old_sha1);
+ else if (!prefixcmp(buffer.buf, "ref: ")) {
+ ref->symref = xstrdup(buffer.buf + 5);
+ ret = 0;
+ }
}
strbuf_release(&buffer);
free(url);
return ret;
}
+
+/* Helpers for fetching packs */
+static int fetch_pack_index(unsigned char *sha1, const char *base_url)
+{
+ int ret = 0;
+ char *hex = xstrdup(sha1_to_hex(sha1));
+ char *filename;
+ char *url;
+ struct strbuf buf = STRBUF_INIT;
+
+ /* Don't use the index if the pack isn't there */
+ end_url_with_slash(&buf, base_url);
+ strbuf_addf(&buf, "objects/pack/pack-%s.pack", hex);
+ url = strbuf_detach(&buf, 0);
+
+ if (http_get_strbuf(url, NULL, 0)) {
+ ret = error("Unable to verify pack %s is available",
+ hex);
+ goto cleanup;
+ }
+
+ if (has_pack_index(sha1)) {
+ ret = 0;
+ goto cleanup;
+ }
+
+ if (http_is_verbose)
+ fprintf(stderr, "Getting index for pack %s\n", hex);
+
+ end_url_with_slash(&buf, base_url);
+ strbuf_addf(&buf, "objects/pack/pack-%s.idx", hex);
+ url = strbuf_detach(&buf, NULL);
+
+ filename = sha1_pack_index_name(sha1);
+ if (http_get_file(url, filename, 0) != HTTP_OK)
+ ret = error("Unable to get pack index %s\n", url);
+
+cleanup:
+ free(hex);
+ free(url);
+ return ret;
+}
+
+static int fetch_and_setup_pack_index(struct packed_git **packs_head,
+ unsigned char *sha1, const char *base_url)
+{
+ struct packed_git *new_pack;
+
+ if (fetch_pack_index(sha1, base_url))
+ return -1;
+
+ new_pack = parse_pack_index(sha1);
+ if (!new_pack)
+ return -1; /* parse_pack_index() already issued error message */
+ new_pack->next = *packs_head;
+ *packs_head = new_pack;
+ return 0;
+}
+
+int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
+{
+ int ret = 0, i = 0;
+ char *url, *data;
+ struct strbuf buf = STRBUF_INIT;
+ unsigned char sha1[20];
+
+ end_url_with_slash(&buf, base_url);
+ strbuf_addstr(&buf, "objects/info/packs");
+ url = strbuf_detach(&buf, NULL);
+
+ ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
+ if (ret != HTTP_OK)
+ goto cleanup;
+
+ data = buf.buf;
+ while (i < buf.len) {
+ switch (data[i]) {
+ case 'P':
+ i++;
+ if (i + 52 <= buf.len &&
+ !prefixcmp(data + i, " pack-") &&
+ !prefixcmp(data + i + 46, ".pack\n")) {
+ get_sha1_hex(data + i + 6, sha1);
+ fetch_and_setup_pack_index(packs_head, sha1,
+ base_url);
+ i += 51;
+ break;
+ }
+ default:
+ while (i < buf.len && data[i] != '\n')
+ i++;
+ }
+ i++;
+ }
+
+cleanup:
+ free(url);
+ return ret;
+}
+
+void release_http_pack_request(struct http_pack_request *preq)
+{
+ if (preq->packfile != NULL) {
+ fclose(preq->packfile);
+ preq->packfile = NULL;
+ preq->slot->local = NULL;
+ }
+ if (preq->range_header != NULL) {
+ curl_slist_free_all(preq->range_header);
+ preq->range_header = NULL;
+ }
+ preq->slot = NULL;
+ free(preq->url);
+}
+
+int finish_http_pack_request(struct http_pack_request *preq)
+{
+ int ret;
+ struct packed_git **lst;
+
+ preq->target->pack_size = ftell(preq->packfile);
+
+ if (preq->packfile != NULL) {
+ fclose(preq->packfile);
+ preq->packfile = NULL;
+ preq->slot->local = NULL;
+ }
+
+ ret = move_temp_to_file(preq->tmpfile, preq->filename);
+ if (ret)
+ return ret;
+
+ lst = preq->lst;
+ while (*lst != preq->target)
+ lst = &((*lst)->next);
+ *lst = (*lst)->next;
+
+ if (verify_pack(preq->target))
+ return -1;
+ install_packed_git(preq->target);
+
+ return 0;
+}
+
+struct http_pack_request *new_http_pack_request(
+ struct packed_git *target, const char *base_url)
+{
+ char *url;
+ char *filename;
+ long prev_posn = 0;
+ char range[RANGE_HEADER_SIZE];
+ struct strbuf buf = STRBUF_INIT;
+ struct http_pack_request *preq;
+
+ preq = xmalloc(sizeof(*preq));
+ preq->target = target;
+ preq->range_header = NULL;
+
+ end_url_with_slash(&buf, base_url);
+ strbuf_addf(&buf, "objects/pack/pack-%s.pack",
+ sha1_to_hex(target->sha1));
+ url = strbuf_detach(&buf, NULL);
+ preq->url = xstrdup(url);
+
+ filename = sha1_pack_name(target->sha1);
+ snprintf(preq->filename, sizeof(preq->filename), "%s", filename);
+ snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp", filename);
+ preq->packfile = fopen(preq->tmpfile, "a");
+ if (!preq->packfile) {
+ error("Unable to open local file %s for pack",
+ preq->tmpfile);
+ goto abort;
+ }
+
+ preq->slot = get_active_slot();
+ preq->slot->local = preq->packfile;
+ curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
+ curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
+ curl_easy_setopt(preq->slot->curl, CURLOPT_URL, url);
+ curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
+ no_pragma_header);
+
+ /*
+ * If there is data present from a previous transfer attempt,
+ * resume where it left off
+ */
+ prev_posn = ftell(preq->packfile);
+ if (prev_posn>0) {
+ if (http_is_verbose)
+ 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);
+ preq->range_header = curl_slist_append(NULL, range);
+ curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
+ preq->range_header);
+ }
+
+ return preq;
+
+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;
+}