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https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Jim Meyering](/assets/img/avatar_default.png)
Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1351 lines
32 KiB
C
1351 lines
32 KiB
C
#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 "credential.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 const char *ssl_cert;
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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 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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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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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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#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.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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if (git_config_bool(var, value))
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ssl_cert_password_required = 1;
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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.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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struct strbuf up = STRBUF_INIT;
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credential_fill(&http_auth);
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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,
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strbuf_detach(&up, NULL));
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}
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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.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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static CURL *get_curl_handle(void)
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{
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CURL *result = curl_easy_init();
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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 (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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curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
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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_HTTP_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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if (curl_http_proxy) {
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curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
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curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
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}
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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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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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http_is_verbose = 0;
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git_config(http_options, NULL);
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curl_global_init(CURL_GLOBAL_ALL);
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http_proactive_auth = proactive_auth;
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if (remote && remote->http_proxy)
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curl_http_proxy = xstrdup(remote->http_proxy);
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pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
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no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
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#ifdef USE_CURL_MULTI
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{
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char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
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if (http_max_requests != NULL)
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max_requests = atoi(http_max_requests);
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}
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curlm = curl_multi_init();
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if (curlm == NULL) {
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fprintf(stderr, "Error creating curl multi handle.\n");
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exit(1);
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}
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#endif
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if (getenv("GIT_SSL_NO_VERIFY"))
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curl_ssl_verify = 0;
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set_from_env(&ssl_cert, "GIT_SSL_CERT");
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#if LIBCURL_VERSION_NUM >= 0x070903
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set_from_env(&ssl_key, "GIT_SSL_KEY");
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#endif
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#if LIBCURL_VERSION_NUM >= 0x070908
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set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
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#endif
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set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
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set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
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low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
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if (low_speed_limit != NULL)
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curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
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low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
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if (low_speed_time != NULL)
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curl_low_speed_time = strtol(low_speed_time, NULL, 10);
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if (curl_ssl_verify == -1)
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curl_ssl_verify = 1;
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curl_session_count = 0;
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#ifdef USE_CURL_MULTI
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if (max_requests < 1)
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max_requests = DEFAULT_MAX_REQUESTS;
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#endif
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if (getenv("GIT_CURL_FTP_NO_EPSV"))
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curl_ftp_no_epsv = 1;
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if (url) {
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credential_from_url(&http_auth, url);
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if (!ssl_cert_password_required &&
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getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
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!prefixcmp(url, "https://"))
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ssl_cert_password_required = 1;
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}
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#ifndef NO_CURL_EASY_DUPHANDLE
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curl_default = get_curl_handle();
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#endif
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}
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void http_cleanup(void)
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{
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struct active_request_slot *slot = active_queue_head;
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while (slot != NULL) {
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struct active_request_slot *next = slot->next;
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if (slot->curl != NULL) {
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#ifdef USE_CURL_MULTI
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curl_multi_remove_handle(curlm, slot->curl);
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#endif
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curl_easy_cleanup(slot->curl);
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}
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free(slot);
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slot = next;
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}
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active_queue_head = NULL;
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#ifndef NO_CURL_EASY_DUPHANDLE
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curl_easy_cleanup(curl_default);
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#endif
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#ifdef USE_CURL_MULTI
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curl_multi_cleanup(curlm);
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#endif
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curl_global_cleanup();
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curl_slist_free_all(pragma_header);
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pragma_header = NULL;
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curl_slist_free_all(no_pragma_header);
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no_pragma_header = NULL;
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if (curl_http_proxy) {
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free((void *)curl_http_proxy);
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curl_http_proxy = NULL;
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}
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if (cert_auth.password != NULL) {
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memset(cert_auth.password, 0, strlen(cert_auth.password));
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free(cert_auth.password);
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cert_auth.password = NULL;
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}
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ssl_cert_password_required = 0;
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}
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struct active_request_slot *get_active_slot(void)
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{
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struct active_request_slot *slot = active_queue_head;
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struct active_request_slot *newslot;
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#ifdef USE_CURL_MULTI
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int num_transfers;
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/* Wait for a slot to open up if the queue is full */
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while (active_requests >= max_requests) {
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curl_multi_perform(curlm, &num_transfers);
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if (num_transfers < active_requests)
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process_curl_messages();
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}
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#endif
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while (slot != NULL && slot->in_use)
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slot = slot->next;
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if (slot == NULL) {
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newslot = xmalloc(sizeof(*newslot));
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newslot->curl = NULL;
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newslot->in_use = 0;
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newslot->next = NULL;
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slot = active_queue_head;
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if (slot == NULL) {
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active_queue_head = newslot;
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} else {
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while (slot->next != NULL)
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slot = slot->next;
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slot->next = newslot;
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}
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slot = newslot;
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}
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if (slot->curl == NULL) {
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#ifdef NO_CURL_EASY_DUPHANDLE
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slot->curl = get_curl_handle();
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#else
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slot->curl = curl_easy_duphandle(curl_default);
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#endif
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curl_session_count++;
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}
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active_requests++;
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slot->in_use = 1;
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slot->results = NULL;
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slot->finished = NULL;
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slot->callback_data = NULL;
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slot->callback_func = NULL;
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curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
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curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
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curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
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curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
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curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
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curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
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curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
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curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
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curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
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return slot;
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}
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int start_active_slot(struct active_request_slot *slot)
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{
|
|
#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);
|
|
|
|
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 closedown_active_slot(struct active_request_slot *slot)
|
|
{
|
|
active_requests--;
|
|
slot->in_use = 0;
|
|
}
|
|
|
|
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_active_slot(struct active_request_slot *slot)
|
|
{
|
|
closedown_active_slot(slot);
|
|
curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
|
|
|
|
if (slot->finished != NULL)
|
|
(*slot->finished) = 1;
|
|
|
|
/* Store slot results so they can be read after the slot is reused */
|
|
if (slot->results != NULL) {
|
|
slot->results->curl_result = slot->curl_result;
|
|
slot->results->http_code = slot->http_code;
|
|
}
|
|
|
|
/* Run callback if appropriate */
|
|
if (slot->callback_func != NULL)
|
|
slot->callback_func(slot->callback_data);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
struct curl_slist *headers = NULL;
|
|
struct strbuf buf = STRBUF_INIT;
|
|
int ret;
|
|
|
|
slot = get_active_slot();
|
|
slot->results = &results;
|
|
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);
|
|
}
|
|
|
|
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)
|
|
ret = HTTP_OK;
|
|
else if (missing_target(&results))
|
|
ret = HTTP_MISSING_TARGET;
|
|
else if (results.http_code == 401) {
|
|
if (http_auth.username && http_auth.password) {
|
|
credential_reject(&http_auth);
|
|
ret = HTTP_NOAUTH;
|
|
} else {
|
|
credential_fill(&http_auth);
|
|
init_curl_http_auth(slot->curl);
|
|
ret = HTTP_REAUTH;
|
|
}
|
|
} else {
|
|
if (!curl_errorstr[0])
|
|
strlcpy(curl_errorstr,
|
|
curl_easy_strerror(results.curl_result),
|
|
sizeof(curl_errorstr));
|
|
ret = HTTP_ERROR;
|
|
}
|
|
} else {
|
|
error("Unable to start HTTP request for %s", url);
|
|
ret = HTTP_START_FAILED;
|
|
}
|
|
|
|
curl_slist_free_all(headers);
|
|
strbuf_release(&buf);
|
|
|
|
if (ret == HTTP_OK)
|
|
credential_approve(&http_auth);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int http_request_reauth(const char *url, void *result, int target,
|
|
int options)
|
|
{
|
|
int ret = http_request(url, result, target, options);
|
|
if (ret != HTTP_REAUTH)
|
|
return ret;
|
|
return http_request(url, result, target, options);
|
|
}
|
|
|
|
int http_get_strbuf(const char *url, struct strbuf *result, int 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, 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_reauth(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", 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 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, 0) != HTTP_OK) {
|
|
error("Unable to get pack index %s\n", 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, NULL);
|
|
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 = move_temp_to_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)
|
|
{
|
|
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;
|
|
}
|
|
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)
|
|
{
|
|
struct packed_git **lst;
|
|
struct packed_git *p = preq->target;
|
|
char *tmp_idx;
|
|
struct child_process ip;
|
|
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;
|
|
|
|
tmp_idx = xstrdup(preq->tmpfile);
|
|
strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
|
|
".idx.temp");
|
|
|
|
ip_argv[0] = "index-pack";
|
|
ip_argv[1] = "-o";
|
|
ip_argv[2] = tmp_idx;
|
|
ip_argv[3] = preq->tmpfile;
|
|
ip_argv[4] = NULL;
|
|
|
|
memset(&ip, 0, sizeof(ip));
|
|
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 (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
|
|
|| move_temp_to_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);
|
|
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(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);
|
|
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);
|
|
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;
|
|
|
|
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 =
|
|
move_temp_to_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;
|
|
}
|
|
}
|