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synced 2024-08-27 19:49:21 +00:00
![Jeff King](/assets/img/avatar_default.png)
When we want to convert "foo.pack" to "foo.idx", we do it by duplicating the original string and then munging the bytes in place. Let's use strip_suffix and xstrfmt instead, which has several advantages: 1. It's more clear what the intent is. 2. It does not implicitly rely on the fact that strlen(".idx") <= strlen(".pack") to avoid an overflow. 3. We communicate the assumption that the input file ends with ".pack" (and get a run-time check that this is so). 4. We drop calls to strcpy, which makes auditing the code base easier. Likewise, we can do this to convert ".pack" to ".bitmap", avoiding some manual memory computation. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1846 lines
45 KiB
C
1846 lines
45 KiB
C
#include "git-compat-util.h"
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#include "http.h"
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#include "pack.h"
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#include "sideband.h"
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#include "run-command.h"
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#include "url.h"
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#include "urlmatch.h"
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#include "credential.h"
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#include "version.h"
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#include "pkt-line.h"
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#include "gettext.h"
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int active_requests;
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int http_is_verbose;
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size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
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#if LIBCURL_VERSION_NUM >= 0x070a06
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#define LIBCURL_CAN_HANDLE_AUTH_ANY
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#endif
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static int min_curl_sessions = 1;
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static int curl_session_count;
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#ifdef USE_CURL_MULTI
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static int max_requests = -1;
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static CURLM *curlm;
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#endif
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#ifndef NO_CURL_EASY_DUPHANDLE
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static CURL *curl_default;
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#endif
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#define PREV_BUF_SIZE 4096
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#define RANGE_HEADER_SIZE 30
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char curl_errorstr[CURL_ERROR_SIZE];
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static int curl_ssl_verify = -1;
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static int curl_ssl_try;
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static const char *ssl_cert;
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static const char *ssl_cipherlist;
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static const char *ssl_version;
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static struct {
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const char *name;
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long ssl_version;
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} sslversions[] = {
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{ "sslv2", CURL_SSLVERSION_SSLv2 },
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{ "sslv3", CURL_SSLVERSION_SSLv3 },
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{ "tlsv1", CURL_SSLVERSION_TLSv1 },
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#if LIBCURL_VERSION_NUM >= 0x072200
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{ "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
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{ "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
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{ "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
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#endif
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};
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#if LIBCURL_VERSION_NUM >= 0x070903
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static const char *ssl_key;
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#endif
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#if LIBCURL_VERSION_NUM >= 0x070908
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static const char *ssl_capath;
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#endif
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static const char *ssl_cainfo;
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static long curl_low_speed_limit = -1;
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static long curl_low_speed_time = -1;
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static int curl_ftp_no_epsv;
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static const char *curl_http_proxy;
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static const char *curl_cookie_file;
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static int curl_save_cookies;
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struct credential http_auth = CREDENTIAL_INIT;
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static int http_proactive_auth;
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static const char *user_agent;
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#if LIBCURL_VERSION_NUM >= 0x071700
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/* Use CURLOPT_KEYPASSWD as is */
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#elif LIBCURL_VERSION_NUM >= 0x070903
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#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
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#else
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#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
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#endif
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static struct credential cert_auth = CREDENTIAL_INIT;
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static int ssl_cert_password_required;
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#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
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static unsigned long http_auth_methods = CURLAUTH_ANY;
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#endif
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static struct curl_slist *pragma_header;
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static struct curl_slist *no_pragma_header;
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static struct active_request_slot *active_queue_head;
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static char *cached_accept_language;
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size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
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{
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size_t size = eltsize * nmemb;
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struct buffer *buffer = buffer_;
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if (size > buffer->buf.len - buffer->posn)
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size = buffer->buf.len - buffer->posn;
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memcpy(ptr, buffer->buf.buf + buffer->posn, size);
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buffer->posn += size;
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return size;
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}
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#ifndef NO_CURL_IOCTL
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curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
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{
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struct buffer *buffer = clientp;
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switch (cmd) {
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case CURLIOCMD_NOP:
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return CURLIOE_OK;
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case CURLIOCMD_RESTARTREAD:
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buffer->posn = 0;
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return CURLIOE_OK;
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default:
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return CURLIOE_UNKNOWNCMD;
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}
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}
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#endif
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size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
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{
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size_t size = eltsize * nmemb;
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struct strbuf *buffer = buffer_;
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strbuf_add(buffer, ptr, size);
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return size;
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}
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size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
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{
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return eltsize * nmemb;
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}
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static void closedown_active_slot(struct active_request_slot *slot)
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{
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active_requests--;
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slot->in_use = 0;
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}
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static void finish_active_slot(struct active_request_slot *slot)
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{
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closedown_active_slot(slot);
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curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
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if (slot->finished != NULL)
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(*slot->finished) = 1;
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/* Store slot results so they can be read after the slot is reused */
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if (slot->results != NULL) {
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slot->results->curl_result = slot->curl_result;
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slot->results->http_code = slot->http_code;
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#if LIBCURL_VERSION_NUM >= 0x070a08
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curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
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&slot->results->auth_avail);
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#else
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slot->results->auth_avail = 0;
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#endif
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}
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/* Run callback if appropriate */
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if (slot->callback_func != NULL)
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slot->callback_func(slot->callback_data);
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}
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#ifdef USE_CURL_MULTI
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static void process_curl_messages(void)
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{
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int num_messages;
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struct active_request_slot *slot;
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CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
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while (curl_message != NULL) {
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if (curl_message->msg == CURLMSG_DONE) {
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int curl_result = curl_message->data.result;
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slot = active_queue_head;
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while (slot != NULL &&
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slot->curl != curl_message->easy_handle)
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slot = slot->next;
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if (slot != NULL) {
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curl_multi_remove_handle(curlm, slot->curl);
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slot->curl_result = curl_result;
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finish_active_slot(slot);
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} else {
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fprintf(stderr, "Received DONE message for unknown request!\n");
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}
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} else {
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fprintf(stderr, "Unknown CURL message received: %d\n",
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(int)curl_message->msg);
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}
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curl_message = curl_multi_info_read(curlm, &num_messages);
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}
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}
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#endif
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static int http_options(const char *var, const char *value, void *cb)
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{
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if (!strcmp("http.sslverify", var)) {
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curl_ssl_verify = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("http.sslcipherlist", var))
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return git_config_string(&ssl_cipherlist, var, value);
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if (!strcmp("http.sslversion", var))
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return git_config_string(&ssl_version, var, value);
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if (!strcmp("http.sslcert", var))
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return git_config_string(&ssl_cert, var, value);
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#if LIBCURL_VERSION_NUM >= 0x070903
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if (!strcmp("http.sslkey", var))
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return git_config_string(&ssl_key, var, value);
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#endif
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#if LIBCURL_VERSION_NUM >= 0x070908
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if (!strcmp("http.sslcapath", var))
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return git_config_string(&ssl_capath, var, value);
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#endif
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if (!strcmp("http.sslcainfo", var))
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return git_config_string(&ssl_cainfo, var, value);
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if (!strcmp("http.sslcertpasswordprotected", var)) {
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ssl_cert_password_required = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("http.ssltry", var)) {
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curl_ssl_try = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("http.minsessions", var)) {
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min_curl_sessions = git_config_int(var, value);
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#ifndef USE_CURL_MULTI
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if (min_curl_sessions > 1)
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min_curl_sessions = 1;
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#endif
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return 0;
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}
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#ifdef USE_CURL_MULTI
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if (!strcmp("http.maxrequests", var)) {
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max_requests = git_config_int(var, value);
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return 0;
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}
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#endif
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if (!strcmp("http.lowspeedlimit", var)) {
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curl_low_speed_limit = (long)git_config_int(var, value);
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return 0;
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}
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if (!strcmp("http.lowspeedtime", var)) {
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curl_low_speed_time = (long)git_config_int(var, value);
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return 0;
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}
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if (!strcmp("http.noepsv", var)) {
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curl_ftp_no_epsv = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("http.proxy", var))
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return git_config_string(&curl_http_proxy, var, value);
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if (!strcmp("http.cookiefile", var))
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return git_config_string(&curl_cookie_file, var, value);
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if (!strcmp("http.savecookies", var)) {
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curl_save_cookies = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("http.postbuffer", var)) {
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http_post_buffer = git_config_int(var, value);
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if (http_post_buffer < LARGE_PACKET_MAX)
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http_post_buffer = LARGE_PACKET_MAX;
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return 0;
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}
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if (!strcmp("http.useragent", var))
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return git_config_string(&user_agent, var, value);
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/* Fall back on the default ones */
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return git_default_config(var, value, cb);
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}
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static void init_curl_http_auth(CURL *result)
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{
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if (!http_auth.username)
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return;
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credential_fill(&http_auth);
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#if LIBCURL_VERSION_NUM >= 0x071301
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curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
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curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
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#else
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{
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static struct strbuf up = STRBUF_INIT;
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/*
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* Note that we assume we only ever have a single set of
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* credentials in a given program run, so we do not have
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* to worry about updating this buffer, only setting its
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* initial value.
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*/
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if (!up.len)
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strbuf_addf(&up, "%s:%s",
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http_auth.username, http_auth.password);
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curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
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}
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#endif
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}
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static int has_cert_password(void)
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{
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if (ssl_cert == NULL || ssl_cert_password_required != 1)
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return 0;
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if (!cert_auth.password) {
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cert_auth.protocol = xstrdup("cert");
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cert_auth.username = xstrdup("");
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cert_auth.path = xstrdup(ssl_cert);
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credential_fill(&cert_auth);
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}
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return 1;
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}
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#if LIBCURL_VERSION_NUM >= 0x071900
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static void set_curl_keepalive(CURL *c)
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{
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curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
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}
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#elif LIBCURL_VERSION_NUM >= 0x071000
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static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
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{
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int ka = 1;
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int rc;
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socklen_t len = (socklen_t)sizeof(ka);
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if (type != CURLSOCKTYPE_IPCXN)
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return 0;
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rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
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if (rc < 0)
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warning("unable to set SO_KEEPALIVE on socket %s",
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strerror(errno));
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return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
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}
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static void set_curl_keepalive(CURL *c)
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{
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curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
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}
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#else
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static void set_curl_keepalive(CURL *c)
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{
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/* not supported on older curl versions */
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}
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#endif
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static CURL *get_curl_handle(void)
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{
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CURL *result = curl_easy_init();
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if (!result)
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die("curl_easy_init failed");
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if (!curl_ssl_verify) {
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curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
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curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
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} else {
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/* Verify authenticity of the peer's certificate */
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curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
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/* The name in the cert must match whom we tried to connect */
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curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
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}
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#if LIBCURL_VERSION_NUM >= 0x070907
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curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
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#endif
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#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
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curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
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#endif
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if (http_proactive_auth)
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init_curl_http_auth(result);
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if (getenv("GIT_SSL_VERSION"))
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ssl_version = getenv("GIT_SSL_VERSION");
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if (ssl_version && *ssl_version) {
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int i;
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for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
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if (!strcmp(ssl_version, sslversions[i].name)) {
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curl_easy_setopt(result, CURLOPT_SSLVERSION,
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sslversions[i].ssl_version);
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break;
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}
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}
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if (i == ARRAY_SIZE(sslversions))
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warning("unsupported ssl version %s: using default",
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ssl_version);
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}
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if (getenv("GIT_SSL_CIPHER_LIST"))
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ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
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if (ssl_cipherlist != NULL && *ssl_cipherlist)
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curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
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ssl_cipherlist);
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if (ssl_cert != NULL)
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curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
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if (has_cert_password())
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curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
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#if LIBCURL_VERSION_NUM >= 0x070903
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if (ssl_key != NULL)
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curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
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#endif
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#if LIBCURL_VERSION_NUM >= 0x070908
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if (ssl_capath != NULL)
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curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
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#endif
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if (ssl_cainfo != NULL)
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curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
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if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
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curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
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curl_low_speed_limit);
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curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
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curl_low_speed_time);
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}
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curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
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#if LIBCURL_VERSION_NUM >= 0x071301
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curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
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#elif LIBCURL_VERSION_NUM >= 0x071101
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curl_easy_setopt(result, CURLOPT_POST301, 1);
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#endif
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if (getenv("GIT_CURL_VERBOSE"))
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curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
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curl_easy_setopt(result, CURLOPT_USERAGENT,
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user_agent ? user_agent : git_user_agent());
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if (curl_ftp_no_epsv)
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curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
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#ifdef CURLOPT_USE_SSL
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if (curl_ssl_try)
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curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
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#endif
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if (curl_http_proxy) {
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curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
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}
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#if LIBCURL_VERSION_NUM >= 0x070a07
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curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
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#endif
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set_curl_keepalive(result);
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return result;
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}
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static void set_from_env(const char **var, const char *envname)
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{
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const char *val = getenv(envname);
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if (val)
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*var = val;
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}
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|
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void http_init(struct remote *remote, const char *url, int proactive_auth)
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|
{
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char *low_speed_limit;
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char *low_speed_time;
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char *normalized_url;
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struct urlmatch_config config = { STRING_LIST_INIT_DUP };
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config.section = "http";
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config.key = NULL;
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config.collect_fn = http_options;
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config.cascade_fn = git_default_config;
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config.cb = NULL;
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http_is_verbose = 0;
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normalized_url = url_normalize(url, &config.url);
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git_config(urlmatch_config_entry, &config);
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free(normalized_url);
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if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
|
|
die("curl_global_init failed");
|
|
|
|
http_proactive_auth = proactive_auth;
|
|
|
|
if (remote && remote->http_proxy)
|
|
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
|
|
{
|
|
char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
|
|
if (http_max_requests != NULL)
|
|
max_requests = atoi(http_max_requests);
|
|
}
|
|
|
|
curlm = curl_multi_init();
|
|
if (!curlm)
|
|
die("curl_multi_init failed");
|
|
#endif
|
|
|
|
if (getenv("GIT_SSL_NO_VERIFY"))
|
|
curl_ssl_verify = 0;
|
|
|
|
set_from_env(&ssl_cert, "GIT_SSL_CERT");
|
|
#if LIBCURL_VERSION_NUM >= 0x070903
|
|
set_from_env(&ssl_key, "GIT_SSL_KEY");
|
|
#endif
|
|
#if LIBCURL_VERSION_NUM >= 0x070908
|
|
set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
|
|
#endif
|
|
set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
|
|
|
|
set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
|
|
|
|
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);
|
|
|
|
if (curl_ssl_verify == -1)
|
|
curl_ssl_verify = 1;
|
|
|
|
curl_session_count = 0;
|
|
#ifdef USE_CURL_MULTI
|
|
if (max_requests < 1)
|
|
max_requests = DEFAULT_MAX_REQUESTS;
|
|
#endif
|
|
|
|
if (getenv("GIT_CURL_FTP_NO_EPSV"))
|
|
curl_ftp_no_epsv = 1;
|
|
|
|
if (url) {
|
|
credential_from_url(&http_auth, url);
|
|
if (!ssl_cert_password_required &&
|
|
getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
|
|
starts_with(url, "https://"))
|
|
ssl_cert_password_required = 1;
|
|
}
|
|
|
|
#ifndef NO_CURL_EASY_DUPHANDLE
|
|
curl_default = get_curl_handle();
|
|
#endif
|
|
}
|
|
|
|
void http_cleanup(void)
|
|
{
|
|
struct active_request_slot *slot = active_queue_head;
|
|
|
|
while (slot != NULL) {
|
|
struct active_request_slot *next = slot->next;
|
|
if (slot->curl != NULL) {
|
|
#ifdef USE_CURL_MULTI
|
|
curl_multi_remove_handle(curlm, slot->curl);
|
|
#endif
|
|
curl_easy_cleanup(slot->curl);
|
|
}
|
|
free(slot);
|
|
slot = next;
|
|
}
|
|
active_queue_head = NULL;
|
|
|
|
#ifndef NO_CURL_EASY_DUPHANDLE
|
|
curl_easy_cleanup(curl_default);
|
|
#endif
|
|
|
|
#ifdef USE_CURL_MULTI
|
|
curl_multi_cleanup(curlm);
|
|
#endif
|
|
curl_global_cleanup();
|
|
|
|
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;
|
|
}
|
|
|
|
if (cert_auth.password != NULL) {
|
|
memset(cert_auth.password, 0, strlen(cert_auth.password));
|
|
free(cert_auth.password);
|
|
cert_auth.password = NULL;
|
|
}
|
|
ssl_cert_password_required = 0;
|
|
|
|
free(cached_accept_language);
|
|
cached_accept_language = NULL;
|
|
}
|
|
|
|
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
|
|
curl_session_count++;
|
|
}
|
|
|
|
active_requests++;
|
|
slot->in_use = 1;
|
|
slot->results = NULL;
|
|
slot->finished = NULL;
|
|
slot->callback_data = NULL;
|
|
slot->callback_func = NULL;
|
|
curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
|
|
if (curl_save_cookies)
|
|
curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
|
|
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
|
|
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
|
|
curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
|
|
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
|
|
curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
|
|
curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
|
|
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
|
|
#endif
|
|
if (http_auth.password)
|
|
init_curl_http_auth(slot->curl);
|
|
|
|
return slot;
|
|
}
|
|
|
|
int start_active_slot(struct active_request_slot *slot)
|
|
{
|
|
#ifdef USE_CURL_MULTI
|
|
CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
|
|
int num_transfers;
|
|
|
|
if (curlm_result != CURLM_OK &&
|
|
curlm_result != CURLM_CALL_MULTI_PERFORM) {
|
|
active_requests--;
|
|
slot->in_use = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We know there must be something to do, since we just added
|
|
* something.
|
|
*/
|
|
curl_multi_perform(curlm, &num_transfers);
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
#ifdef USE_CURL_MULTI
|
|
struct fill_chain {
|
|
void *data;
|
|
int (*fill)(void *);
|
|
struct fill_chain *next;
|
|
};
|
|
|
|
static struct fill_chain *fill_cfg;
|
|
|
|
void add_fill_function(void *data, int (*fill)(void *))
|
|
{
|
|
struct fill_chain *new = xmalloc(sizeof(*new));
|
|
struct fill_chain **linkp = &fill_cfg;
|
|
new->data = data;
|
|
new->fill = fill;
|
|
new->next = NULL;
|
|
while (*linkp)
|
|
linkp = &(*linkp)->next;
|
|
*linkp = new;
|
|
}
|
|
|
|
void fill_active_slots(void)
|
|
{
|
|
struct active_request_slot *slot = active_queue_head;
|
|
|
|
while (active_requests < max_requests) {
|
|
struct fill_chain *fill;
|
|
for (fill = fill_cfg; fill; fill = fill->next)
|
|
if (fill->fill(fill->data))
|
|
break;
|
|
|
|
if (!fill)
|
|
break;
|
|
}
|
|
|
|
while (slot != NULL) {
|
|
if (!slot->in_use && slot->curl != NULL
|
|
&& curl_session_count > min_curl_sessions) {
|
|
curl_easy_cleanup(slot->curl);
|
|
slot->curl = NULL;
|
|
curl_session_count--;
|
|
}
|
|
slot = slot->next;
|
|
}
|
|
}
|
|
|
|
void step_active_slots(void)
|
|
{
|
|
int num_transfers;
|
|
CURLMcode curlm_result;
|
|
|
|
do {
|
|
curlm_result = curl_multi_perform(curlm, &num_transfers);
|
|
} while (curlm_result == CURLM_CALL_MULTI_PERFORM);
|
|
if (num_transfers < active_requests) {
|
|
process_curl_messages();
|
|
fill_active_slots();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void run_active_slot(struct active_request_slot *slot)
|
|
{
|
|
#ifdef USE_CURL_MULTI
|
|
fd_set readfds;
|
|
fd_set writefds;
|
|
fd_set excfds;
|
|
int max_fd;
|
|
struct timeval select_timeout;
|
|
int finished = 0;
|
|
|
|
slot->finished = &finished;
|
|
while (!finished) {
|
|
step_active_slots();
|
|
|
|
if (slot->in_use) {
|
|
#if LIBCURL_VERSION_NUM >= 0x070f04
|
|
long curl_timeout;
|
|
curl_multi_timeout(curlm, &curl_timeout);
|
|
if (curl_timeout == 0) {
|
|
continue;
|
|
} else if (curl_timeout == -1) {
|
|
select_timeout.tv_sec = 0;
|
|
select_timeout.tv_usec = 50000;
|
|
} else {
|
|
select_timeout.tv_sec = curl_timeout / 1000;
|
|
select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
|
|
}
|
|
#else
|
|
select_timeout.tv_sec = 0;
|
|
select_timeout.tv_usec = 50000;
|
|
#endif
|
|
|
|
max_fd = -1;
|
|
FD_ZERO(&readfds);
|
|
FD_ZERO(&writefds);
|
|
FD_ZERO(&excfds);
|
|
curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
|
|
|
|
/*
|
|
* It can happen that curl_multi_timeout returns a pathologically
|
|
* long timeout when curl_multi_fdset returns no file descriptors
|
|
* to read. See commit message for more details.
|
|
*/
|
|
if (max_fd < 0 &&
|
|
(select_timeout.tv_sec > 0 ||
|
|
select_timeout.tv_usec > 50000)) {
|
|
select_timeout.tv_sec = 0;
|
|
select_timeout.tv_usec = 50000;
|
|
}
|
|
|
|
select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
|
|
}
|
|
}
|
|
#else
|
|
while (slot->in_use) {
|
|
slot->curl_result = curl_easy_perform(slot->curl);
|
|
finish_active_slot(slot);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void release_active_slot(struct active_request_slot *slot)
|
|
{
|
|
closedown_active_slot(slot);
|
|
if (slot->curl && curl_session_count > min_curl_sessions) {
|
|
#ifdef USE_CURL_MULTI
|
|
curl_multi_remove_handle(curlm, slot->curl);
|
|
#endif
|
|
curl_easy_cleanup(slot->curl);
|
|
slot->curl = NULL;
|
|
curl_session_count--;
|
|
}
|
|
#ifdef USE_CURL_MULTI
|
|
fill_active_slots();
|
|
#endif
|
|
}
|
|
|
|
void finish_all_active_slots(void)
|
|
{
|
|
struct active_request_slot *slot = active_queue_head;
|
|
|
|
while (slot != NULL)
|
|
if (slot->in_use) {
|
|
run_active_slot(slot);
|
|
slot = active_queue_head;
|
|
} else {
|
|
slot = slot->next;
|
|
}
|
|
}
|
|
|
|
/* Helpers for modifying and creating URLs */
|
|
static inline int needs_quote(int ch)
|
|
{
|
|
if (((ch >= 'A') && (ch <= 'Z'))
|
|
|| ((ch >= 'a') && (ch <= 'z'))
|
|
|| ((ch >= '0') && (ch <= '9'))
|
|
|| (ch == '/')
|
|
|| (ch == '-')
|
|
|| (ch == '.'))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static char *quote_ref_url(const char *base, const char *ref)
|
|
{
|
|
struct strbuf buf = STRBUF_INIT;
|
|
const char *cp;
|
|
int ch;
|
|
|
|
end_url_with_slash(&buf, base);
|
|
|
|
for (cp = ref; (ch = *cp) != 0; cp++)
|
|
if (needs_quote(ch))
|
|
strbuf_addf(&buf, "%%%02x", ch);
|
|
else
|
|
strbuf_addch(&buf, *cp);
|
|
|
|
return strbuf_detach(&buf, NULL);
|
|
}
|
|
|
|
void append_remote_object_url(struct strbuf *buf, const char *url,
|
|
const char *hex,
|
|
int only_two_digit_prefix)
|
|
{
|
|
end_url_with_slash(buf, url);
|
|
|
|
strbuf_addf(buf, "objects/%.*s/", 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);
|
|
}
|
|
|
|
static int handle_curl_result(struct slot_results *results)
|
|
{
|
|
/*
|
|
* If we see a failing http code with CURLE_OK, we have turned off
|
|
* FAILONERROR (to keep the server's custom error response), and should
|
|
* translate the code into failure here.
|
|
*/
|
|
if (results->curl_result == CURLE_OK &&
|
|
results->http_code >= 400) {
|
|
results->curl_result = CURLE_HTTP_RETURNED_ERROR;
|
|
/*
|
|
* Normally curl will already have put the "reason phrase"
|
|
* from the server into curl_errorstr; unfortunately without
|
|
* FAILONERROR it is lost, so we can give only the numeric
|
|
* status code.
|
|
*/
|
|
snprintf(curl_errorstr, sizeof(curl_errorstr),
|
|
"The requested URL returned error: %ld",
|
|
results->http_code);
|
|
}
|
|
|
|
if (results->curl_result == CURLE_OK) {
|
|
credential_approve(&http_auth);
|
|
return HTTP_OK;
|
|
} else if (missing_target(results))
|
|
return HTTP_MISSING_TARGET;
|
|
else if (results->http_code == 401) {
|
|
if (http_auth.username && http_auth.password) {
|
|
credential_reject(&http_auth);
|
|
return HTTP_NOAUTH;
|
|
} else {
|
|
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
|
|
http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
|
|
#endif
|
|
return HTTP_REAUTH;
|
|
}
|
|
} else {
|
|
#if LIBCURL_VERSION_NUM >= 0x070c00
|
|
if (!curl_errorstr[0])
|
|
strlcpy(curl_errorstr,
|
|
curl_easy_strerror(results->curl_result),
|
|
sizeof(curl_errorstr));
|
|
#endif
|
|
return HTTP_ERROR;
|
|
}
|
|
}
|
|
|
|
int run_one_slot(struct active_request_slot *slot,
|
|
struct slot_results *results)
|
|
{
|
|
slot->results = results;
|
|
if (!start_active_slot(slot)) {
|
|
snprintf(curl_errorstr, sizeof(curl_errorstr),
|
|
"failed to start HTTP request");
|
|
return HTTP_START_FAILED;
|
|
}
|
|
|
|
run_active_slot(slot);
|
|
return handle_curl_result(results);
|
|
}
|
|
|
|
static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
|
|
{
|
|
char *ptr;
|
|
CURLcode ret;
|
|
|
|
strbuf_reset(buf);
|
|
ret = curl_easy_getinfo(curl, info, &ptr);
|
|
if (!ret && ptr)
|
|
strbuf_addstr(buf, ptr);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Check for and extract a content-type parameter. "raw"
|
|
* should be positioned at the start of the potential
|
|
* parameter, with any whitespace already removed.
|
|
*
|
|
* "name" is the name of the parameter. The value is appended
|
|
* to "out".
|
|
*/
|
|
static int extract_param(const char *raw, const char *name,
|
|
struct strbuf *out)
|
|
{
|
|
size_t len = strlen(name);
|
|
|
|
if (strncasecmp(raw, name, len))
|
|
return -1;
|
|
raw += len;
|
|
|
|
if (*raw != '=')
|
|
return -1;
|
|
raw++;
|
|
|
|
while (*raw && !isspace(*raw) && *raw != ';')
|
|
strbuf_addch(out, *raw++);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Extract a normalized version of the content type, with any
|
|
* spaces suppressed, all letters lowercased, and no trailing ";"
|
|
* or parameters.
|
|
*
|
|
* Note that we will silently remove even invalid whitespace. For
|
|
* example, "text / plain" is specifically forbidden by RFC 2616,
|
|
* but "text/plain" is the only reasonable output, and this keeps
|
|
* our code simple.
|
|
*
|
|
* If the "charset" argument is not NULL, store the value of any
|
|
* charset parameter there.
|
|
*
|
|
* Example:
|
|
* "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
|
|
* "text / plain" -> "text/plain"
|
|
*/
|
|
static void extract_content_type(struct strbuf *raw, struct strbuf *type,
|
|
struct strbuf *charset)
|
|
{
|
|
const char *p;
|
|
|
|
strbuf_reset(type);
|
|
strbuf_grow(type, raw->len);
|
|
for (p = raw->buf; *p; p++) {
|
|
if (isspace(*p))
|
|
continue;
|
|
if (*p == ';') {
|
|
p++;
|
|
break;
|
|
}
|
|
strbuf_addch(type, tolower(*p));
|
|
}
|
|
|
|
if (!charset)
|
|
return;
|
|
|
|
strbuf_reset(charset);
|
|
while (*p) {
|
|
while (isspace(*p) || *p == ';')
|
|
p++;
|
|
if (!extract_param(p, "charset", charset))
|
|
return;
|
|
while (*p && !isspace(*p))
|
|
p++;
|
|
}
|
|
|
|
if (!charset->len && starts_with(type->buf, "text/"))
|
|
strbuf_addstr(charset, "ISO-8859-1");
|
|
}
|
|
|
|
static void write_accept_language(struct strbuf *buf)
|
|
{
|
|
/*
|
|
* MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
|
|
* that, q-value will be smaller than 0.001, the minimum q-value the
|
|
* HTTP specification allows. See
|
|
* http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
|
|
*/
|
|
const int MAX_DECIMAL_PLACES = 3;
|
|
const int MAX_LANGUAGE_TAGS = 1000;
|
|
const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
|
|
char **language_tags = NULL;
|
|
int num_langs = 0;
|
|
const char *s = get_preferred_languages();
|
|
int i;
|
|
struct strbuf tag = STRBUF_INIT;
|
|
|
|
/* Don't add Accept-Language header if no language is preferred. */
|
|
if (!s)
|
|
return;
|
|
|
|
/*
|
|
* Split the colon-separated string of preferred languages into
|
|
* language_tags array.
|
|
*/
|
|
do {
|
|
/* collect language tag */
|
|
for (; *s && (isalnum(*s) || *s == '_'); s++)
|
|
strbuf_addch(&tag, *s == '_' ? '-' : *s);
|
|
|
|
/* skip .codeset, @modifier and any other unnecessary parts */
|
|
while (*s && *s != ':')
|
|
s++;
|
|
|
|
if (tag.len) {
|
|
num_langs++;
|
|
REALLOC_ARRAY(language_tags, num_langs);
|
|
language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
|
|
if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
|
|
break;
|
|
}
|
|
} while (*s++);
|
|
|
|
/* write Accept-Language header into buf */
|
|
if (num_langs) {
|
|
int last_buf_len = 0;
|
|
int max_q;
|
|
int decimal_places;
|
|
char q_format[32];
|
|
|
|
/* add '*' */
|
|
REALLOC_ARRAY(language_tags, num_langs + 1);
|
|
language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
|
|
|
|
/* compute decimal_places */
|
|
for (max_q = 1, decimal_places = 0;
|
|
max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
|
|
decimal_places++, max_q *= 10)
|
|
;
|
|
|
|
xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
|
|
|
|
strbuf_addstr(buf, "Accept-Language: ");
|
|
|
|
for (i = 0; i < num_langs; i++) {
|
|
if (i > 0)
|
|
strbuf_addstr(buf, ", ");
|
|
|
|
strbuf_addstr(buf, language_tags[i]);
|
|
|
|
if (i > 0)
|
|
strbuf_addf(buf, q_format, max_q - i);
|
|
|
|
if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
|
|
strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
|
|
break;
|
|
}
|
|
|
|
last_buf_len = buf->len;
|
|
}
|
|
}
|
|
|
|
/* free language tags -- last one is a static '*' */
|
|
for (i = 0; i < num_langs - 1; i++)
|
|
free(language_tags[i]);
|
|
free(language_tags);
|
|
}
|
|
|
|
/*
|
|
* Get an Accept-Language header which indicates user's preferred languages.
|
|
*
|
|
* Examples:
|
|
* LANGUAGE= -> ""
|
|
* LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
|
|
* LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
|
|
* LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
|
|
* LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
|
|
* LANGUAGE= LANG=C -> ""
|
|
*/
|
|
static const char *get_accept_language(void)
|
|
{
|
|
if (!cached_accept_language) {
|
|
struct strbuf buf = STRBUF_INIT;
|
|
write_accept_language(&buf);
|
|
if (buf.len > 0)
|
|
cached_accept_language = strbuf_detach(&buf, NULL);
|
|
}
|
|
|
|
return cached_accept_language;
|
|
}
|
|
|
|
/* http_request() targets */
|
|
#define HTTP_REQUEST_STRBUF 0
|
|
#define HTTP_REQUEST_FILE 1
|
|
|
|
static int http_request(const char *url,
|
|
void *result, int target,
|
|
const struct http_get_options *options)
|
|
{
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
struct curl_slist *headers = NULL;
|
|
struct strbuf buf = STRBUF_INIT;
|
|
const char *accept_language;
|
|
int ret;
|
|
|
|
slot = get_active_slot();
|
|
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);
|
|
}
|
|
} else
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
|
|
fwrite_buffer);
|
|
}
|
|
|
|
accept_language = get_accept_language();
|
|
|
|
if (accept_language)
|
|
headers = curl_slist_append(headers, accept_language);
|
|
|
|
strbuf_addstr(&buf, "Pragma:");
|
|
if (options && options->no_cache)
|
|
strbuf_addstr(&buf, " no-cache");
|
|
if (options && options->keep_error)
|
|
curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
|
|
|
|
headers = curl_slist_append(headers, buf.buf);
|
|
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
|
|
curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
|
|
|
|
ret = run_one_slot(slot, &results);
|
|
|
|
if (options && options->content_type) {
|
|
struct strbuf raw = STRBUF_INIT;
|
|
curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
|
|
extract_content_type(&raw, options->content_type,
|
|
options->charset);
|
|
strbuf_release(&raw);
|
|
}
|
|
|
|
if (options && options->effective_url)
|
|
curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
|
|
options->effective_url);
|
|
|
|
curl_slist_free_all(headers);
|
|
strbuf_release(&buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Update the "base" url to a more appropriate value, as deduced by
|
|
* redirects seen when requesting a URL starting with "url".
|
|
*
|
|
* The "asked" parameter is a URL that we asked curl to access, and must begin
|
|
* with "base".
|
|
*
|
|
* The "got" parameter is the URL that curl reported to us as where we ended
|
|
* up.
|
|
*
|
|
* Returns 1 if we updated the base url, 0 otherwise.
|
|
*
|
|
* Our basic strategy is to compare "base" and "asked" to find the bits
|
|
* specific to our request. We then strip those bits off of "got" to yield the
|
|
* new base. So for example, if our base is "http://example.com/foo.git",
|
|
* and we ask for "http://example.com/foo.git/info/refs", we might end up
|
|
* with "https://other.example.com/foo.git/info/refs". We would want the
|
|
* new URL to become "https://other.example.com/foo.git".
|
|
*
|
|
* Note that this assumes a sane redirect scheme. It's entirely possible
|
|
* in the example above to end up at a URL that does not even end in
|
|
* "info/refs". In such a case we simply punt, as there is not much we can
|
|
* do (and such a scheme is unlikely to represent a real git repository,
|
|
* which means we are likely about to abort anyway).
|
|
*/
|
|
static int update_url_from_redirect(struct strbuf *base,
|
|
const char *asked,
|
|
const struct strbuf *got)
|
|
{
|
|
const char *tail;
|
|
size_t tail_len;
|
|
|
|
if (!strcmp(asked, got->buf))
|
|
return 0;
|
|
|
|
if (!skip_prefix(asked, base->buf, &tail))
|
|
die("BUG: update_url_from_redirect: %s is not a superset of %s",
|
|
asked, base->buf);
|
|
|
|
tail_len = strlen(tail);
|
|
|
|
if (got->len < tail_len ||
|
|
strcmp(tail, got->buf + got->len - tail_len))
|
|
return 0; /* insane redirect scheme */
|
|
|
|
strbuf_reset(base);
|
|
strbuf_add(base, got->buf, got->len - tail_len);
|
|
return 1;
|
|
}
|
|
|
|
static int http_request_reauth(const char *url,
|
|
void *result, int target,
|
|
struct http_get_options *options)
|
|
{
|
|
int ret = http_request(url, result, target, options);
|
|
|
|
if (options && options->effective_url && options->base_url) {
|
|
if (update_url_from_redirect(options->base_url,
|
|
url, options->effective_url)) {
|
|
credential_from_url(&http_auth, options->base_url->buf);
|
|
url = options->effective_url->buf;
|
|
}
|
|
}
|
|
|
|
if (ret != HTTP_REAUTH)
|
|
return ret;
|
|
|
|
/*
|
|
* If we are using KEEP_ERROR, the previous request may have
|
|
* put cruft into our output stream; we should clear it out before
|
|
* making our next request. We only know how to do this for
|
|
* the strbuf case, but that is enough to satisfy current callers.
|
|
*/
|
|
if (options && options->keep_error) {
|
|
switch (target) {
|
|
case HTTP_REQUEST_STRBUF:
|
|
strbuf_reset(result);
|
|
break;
|
|
default:
|
|
die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
|
|
}
|
|
}
|
|
|
|
credential_fill(&http_auth);
|
|
|
|
return http_request(url, result, target, options);
|
|
}
|
|
|
|
int http_get_strbuf(const char *url,
|
|
struct strbuf *result,
|
|
struct http_get_options *options)
|
|
{
|
|
return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
|
|
}
|
|
|
|
/*
|
|
* Downloads a URL and stores the result in the given file.
|
|
*
|
|
* If a previous interrupted download is detected (i.e. a previous temporary
|
|
* file is still around) the download is resumed.
|
|
*/
|
|
static int http_get_file(const char *url, const char *filename,
|
|
struct http_get_options *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_reauth(url, result, HTTP_REQUEST_FILE, options);
|
|
fclose(result);
|
|
|
|
if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
|
|
ret = HTTP_ERROR;
|
|
cleanup:
|
|
strbuf_release(&tmpfile);
|
|
return ret;
|
|
}
|
|
|
|
int http_fetch_ref(const char *base, struct ref *ref)
|
|
{
|
|
struct http_get_options options = {0};
|
|
char *url;
|
|
struct strbuf buffer = STRBUF_INIT;
|
|
int ret = -1;
|
|
|
|
options.no_cache = 1;
|
|
|
|
url = quote_ref_url(base, ref->name);
|
|
if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
|
|
strbuf_rtrim(&buffer);
|
|
if (buffer.len == 40)
|
|
ret = get_sha1_hex(buffer.buf, ref->old_sha1);
|
|
else if (starts_with(buffer.buf, "ref: ")) {
|
|
ref->symref = xstrdup(buffer.buf + 5);
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
strbuf_release(&buffer);
|
|
free(url);
|
|
return ret;
|
|
}
|
|
|
|
/* Helpers for fetching packs */
|
|
static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
|
|
{
|
|
char *url, *tmp;
|
|
struct strbuf buf = STRBUF_INIT;
|
|
|
|
if (http_is_verbose)
|
|
fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
|
|
|
|
end_url_with_slash(&buf, base_url);
|
|
strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
|
|
url = strbuf_detach(&buf, NULL);
|
|
|
|
strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
|
|
tmp = strbuf_detach(&buf, NULL);
|
|
|
|
if (http_get_file(url, tmp, NULL) != HTTP_OK) {
|
|
error("Unable to get pack index %s", url);
|
|
free(tmp);
|
|
tmp = NULL;
|
|
}
|
|
|
|
free(url);
|
|
return tmp;
|
|
}
|
|
|
|
static int fetch_and_setup_pack_index(struct packed_git **packs_head,
|
|
unsigned char *sha1, const char *base_url)
|
|
{
|
|
struct packed_git *new_pack;
|
|
char *tmp_idx = NULL;
|
|
int ret;
|
|
|
|
if (has_pack_index(sha1)) {
|
|
new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
|
|
if (!new_pack)
|
|
return -1; /* parse_pack_index() already issued error message */
|
|
goto add_pack;
|
|
}
|
|
|
|
tmp_idx = fetch_pack_index(sha1, base_url);
|
|
if (!tmp_idx)
|
|
return -1;
|
|
|
|
new_pack = parse_pack_index(sha1, tmp_idx);
|
|
if (!new_pack) {
|
|
unlink(tmp_idx);
|
|
free(tmp_idx);
|
|
|
|
return -1; /* parse_pack_index() already issued error message */
|
|
}
|
|
|
|
ret = verify_pack_index(new_pack);
|
|
if (!ret) {
|
|
close_pack_index(new_pack);
|
|
ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
|
|
}
|
|
free(tmp_idx);
|
|
if (ret)
|
|
return -1;
|
|
|
|
add_pack:
|
|
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)
|
|
{
|
|
struct http_get_options options = {0};
|
|
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);
|
|
|
|
options.no_cache = 1;
|
|
ret = http_get_strbuf(url, &buf, &options);
|
|
if (ret != HTTP_OK)
|
|
goto cleanup;
|
|
|
|
data = buf.buf;
|
|
while (i < buf.len) {
|
|
switch (data[i]) {
|
|
case 'P':
|
|
i++;
|
|
if (i + 52 <= buf.len &&
|
|
starts_with(data + i, " pack-") &&
|
|
starts_with(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;
|
|
}
|
|
if (preq->range_header != NULL) {
|
|
curl_slist_free_all(preq->range_header);
|
|
preq->range_header = NULL;
|
|
}
|
|
preq->slot = NULL;
|
|
free(preq->url);
|
|
free(preq);
|
|
}
|
|
|
|
int finish_http_pack_request(struct http_pack_request *preq)
|
|
{
|
|
struct packed_git **lst;
|
|
struct packed_git *p = preq->target;
|
|
char *tmp_idx;
|
|
size_t len;
|
|
struct child_process ip = CHILD_PROCESS_INIT;
|
|
const char *ip_argv[8];
|
|
|
|
close_pack_index(p);
|
|
|
|
fclose(preq->packfile);
|
|
preq->packfile = NULL;
|
|
|
|
lst = preq->lst;
|
|
while (*lst != p)
|
|
lst = &((*lst)->next);
|
|
*lst = (*lst)->next;
|
|
|
|
if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
|
|
die("BUG: pack tmpfile does not end in .pack.temp?");
|
|
tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
|
|
|
|
ip_argv[0] = "index-pack";
|
|
ip_argv[1] = "-o";
|
|
ip_argv[2] = tmp_idx;
|
|
ip_argv[3] = preq->tmpfile;
|
|
ip_argv[4] = NULL;
|
|
|
|
ip.argv = ip_argv;
|
|
ip.git_cmd = 1;
|
|
ip.no_stdin = 1;
|
|
ip.no_stdout = 1;
|
|
|
|
if (run_command(&ip)) {
|
|
unlink(preq->tmpfile);
|
|
unlink(tmp_idx);
|
|
free(tmp_idx);
|
|
return -1;
|
|
}
|
|
|
|
unlink(sha1_pack_index_name(p->sha1));
|
|
|
|
if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
|
|
|| finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
|
|
free(tmp_idx);
|
|
return -1;
|
|
}
|
|
|
|
install_packed_git(p);
|
|
free(tmp_idx);
|
|
return 0;
|
|
}
|
|
|
|
struct http_pack_request *new_http_pack_request(
|
|
struct packed_git *target, const char *base_url)
|
|
{
|
|
long prev_posn = 0;
|
|
char range[RANGE_HEADER_SIZE];
|
|
struct strbuf buf = STRBUF_INIT;
|
|
struct http_pack_request *preq;
|
|
|
|
preq = xcalloc(1, sizeof(*preq));
|
|
preq->target = target;
|
|
|
|
end_url_with_slash(&buf, base_url);
|
|
strbuf_addf(&buf, "objects/pack/pack-%s.pack",
|
|
sha1_to_hex(target->sha1));
|
|
preq->url = strbuf_detach(&buf, NULL);
|
|
|
|
snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
|
|
sha1_pack_name(target->sha1));
|
|
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();
|
|
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, preq->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);
|
|
xsnprintf(range, sizeof(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(preq->url);
|
|
free(preq);
|
|
return NULL;
|
|
}
|
|
|
|
/* Helpers for fetching objects (loose) */
|
|
static size_t fwrite_sha1_file(char *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 = (void *)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);
|
|
return size;
|
|
}
|
|
|
|
struct http_object_request *new_http_object_request(const char *base_url,
|
|
unsigned char *sha1)
|
|
{
|
|
char *hex = sha1_to_hex(sha1);
|
|
const char *filename;
|
|
char prevfile[PATH_MAX];
|
|
int prevlocal;
|
|
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 = xcalloc(1, sizeof(*freq));
|
|
hashcpy(freq->sha1, sha1);
|
|
freq->localfile = -1;
|
|
|
|
filename = sha1_file_name(sha1);
|
|
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: %s",
|
|
freq->tmpfile, strerror(errno));
|
|
goto abort;
|
|
}
|
|
|
|
git_inflate_init(&freq->stream);
|
|
|
|
git_SHA1_Init(&freq->c);
|
|
|
|
freq->url = get_remote_object_url(base_url, hex, 0);
|
|
|
|
/*
|
|
* 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);
|
|
if (ftruncate(freq->localfile, 0) < 0) {
|
|
error("Couldn't truncate temporary file %s: %s",
|
|
freq->tmpfile, strerror(errno));
|
|
goto abort;
|
|
}
|
|
}
|
|
}
|
|
|
|
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, freq->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);
|
|
xsnprintf(range, sizeof(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;
|
|
|
|
abort:
|
|
free(freq->url);
|
|
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) {
|
|
warning("requested range invalid; we may already have all the data.");
|
|
} 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 =
|
|
finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
|
|
|
|
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;
|
|
}
|
|
if (freq->slot != NULL) {
|
|
freq->slot->callback_func = NULL;
|
|
freq->slot->callback_data = NULL;
|
|
release_active_slot(freq->slot);
|
|
freq->slot = NULL;
|
|
}
|
|
}
|