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git-commit-vandalism/http.c
Jeff King a3722bcbbd http: factor out curl result code normalization 
We make some requests with CURLOPT_FAILONERROR and some without, and
then handle_curl_result() normalizes any failures to a uniform CURLcode.

There are some other code paths in the dumb-http walker which don't use
handle_curl_result(); let's pull the normalization into its own function
so it can be reused.

Arguably those code paths would benefit from the rest of
handle_curl_result(), notably the auth handling. But retro-fitting it
now would be a lot of work, and in practice it doesn't matter too much
(whatever authentication we needed to make the initial contact with the
server is generally sufficient for the rest of the dumb-http requests).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-24 21:22:40 +09:00

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#include "git-compat-util.h"
#include "http.h"
#include "config.h"
#include "pack.h"
#include "sideband.h"
#include "run-command.h"
#include "url.h"
#include "urlmatch.h"
#include "credential.h"
#include "version.h"
#include "pkt-line.h"
#include "gettext.h"
#include "transport.h"
#include "packfile.h"
#include "protocol.h"
#include "string-list.h"
#include "object-store.h"
static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
static int trace_curl_data = 1;
static struct string_list cookies_to_redact = STRING_LIST_INIT_DUP;
#if LIBCURL_VERSION_NUM >= 0x070a08
long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
#else
long int git_curl_ipresolve;
#endif
int active_requests;
int http_is_verbose;
ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
#if LIBCURL_VERSION_NUM >= 0x070a06
#define LIBCURL_CAN_HANDLE_AUTH_ANY
#endif
static int min_curl_sessions = 1;
static int curl_session_count;
#ifdef USE_CURL_MULTI
static int max_requests = -1;
static CURLM *curlm;
#endif
#ifndef NO_CURL_EASY_DUPHANDLE
static CURL *curl_default;
#endif
#define PREV_BUF_SIZE 4096
char curl_errorstr[CURL_ERROR_SIZE];
static int curl_ssl_verify = -1;
static int curl_ssl_try;
static const char *curl_http_version = NULL;
static const char *ssl_cert;
static const char *ssl_cipherlist;
static const char *ssl_version;
static struct {
const char *name;
long ssl_version;
} sslversions[] = {
{ "sslv2", CURL_SSLVERSION_SSLv2 },
{ "sslv3", CURL_SSLVERSION_SSLv3 },
{ "tlsv1", CURL_SSLVERSION_TLSv1 },
#if LIBCURL_VERSION_NUM >= 0x072200
{ "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
{ "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
{ "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
#endif
#if LIBCURL_VERSION_NUM >= 0x073400
{ "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
#endif
};
#if LIBCURL_VERSION_NUM >= 0x070903
static const char *ssl_key;
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
static const char *ssl_capath;
#endif
#if LIBCURL_VERSION_NUM >= 0x071304
static const char *curl_no_proxy;
#endif
#if LIBCURL_VERSION_NUM >= 0x072c00
static const char *ssl_pinnedkey;
#endif
static const char *ssl_cainfo;
static long curl_low_speed_limit = -1;
static long curl_low_speed_time = -1;
static int curl_ftp_no_epsv;
static const char *curl_http_proxy;
static const char *http_proxy_authmethod;
static struct {
const char *name;
long curlauth_param;
} proxy_authmethods[] = {
{ "basic", CURLAUTH_BASIC },
{ "digest", CURLAUTH_DIGEST },
{ "negotiate", CURLAUTH_GSSNEGOTIATE },
{ "ntlm", CURLAUTH_NTLM },
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
{ "anyauth", CURLAUTH_ANY },
#endif
/*
* CURLAUTH_DIGEST_IE has no corresponding command-line option in
* curl(1) and is not included in CURLAUTH_ANY, so we leave it out
* here, too
*/
};
#ifdef CURLGSSAPI_DELEGATION_FLAG
static const char *curl_deleg;
static struct {
const char *name;
long curl_deleg_param;
} curl_deleg_levels[] = {
{ "none", CURLGSSAPI_DELEGATION_NONE },
{ "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
{ "always", CURLGSSAPI_DELEGATION_FLAG },
};
#endif
static struct credential proxy_auth = CREDENTIAL_INIT;
static const char *curl_proxyuserpwd;
static const char *curl_cookie_file;
static int curl_save_cookies;
struct credential http_auth = CREDENTIAL_INIT;
static int http_proactive_auth;
static const char *user_agent;
static int curl_empty_auth = -1;
enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
#if LIBCURL_VERSION_NUM >= 0x071700
/* Use CURLOPT_KEYPASSWD as is */
#elif LIBCURL_VERSION_NUM >= 0x070903
#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
#else
#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
#endif
static struct credential cert_auth = CREDENTIAL_INIT;
static int ssl_cert_password_required;
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
static unsigned long http_auth_methods = CURLAUTH_ANY;
static int http_auth_methods_restricted;
/* Modes for which empty_auth cannot actually help us. */
static unsigned long empty_auth_useless =
CURLAUTH_BASIC
#ifdef CURLAUTH_DIGEST_IE
| CURLAUTH_DIGEST_IE
#endif
| CURLAUTH_DIGEST;
#endif
static struct curl_slist *pragma_header;
static struct curl_slist *no_pragma_header;
static struct curl_slist *extra_http_headers;
static struct active_request_slot *active_queue_head;
static char *cached_accept_language;
static char *http_ssl_backend;
static int http_schannel_check_revoke = 1;
/*
* With the backend being set to `schannel`, setting sslCAinfo would override
* the Certificate Store in cURL v7.60.0 and later, which is not what we want
* by default.
*/
static int http_schannel_use_ssl_cainfo;
size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
{
size_t size = eltsize * nmemb;
struct buffer *buffer = buffer_;
if (size > buffer->buf.len - buffer->posn)
size = buffer->buf.len - buffer->posn;
memcpy(ptr, buffer->buf.buf + buffer->posn, size);
buffer->posn += size;
return size;
}
#ifndef NO_CURL_IOCTL
curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
{
struct buffer *buffer = clientp;
switch (cmd) {
case CURLIOCMD_NOP:
return CURLIOE_OK;
case CURLIOCMD_RESTARTREAD:
buffer->posn = 0;
return CURLIOE_OK;
default:
return CURLIOE_UNKNOWNCMD;
}
}
#endif
size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
{
size_t size = eltsize * nmemb;
struct strbuf *buffer = buffer_;
strbuf_add(buffer, ptr, size);
return size;
}
size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
{
return eltsize * nmemb;
}
static void closedown_active_slot(struct active_request_slot *slot)
{
active_requests--;
slot->in_use = 0;
}
static 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;
#if LIBCURL_VERSION_NUM >= 0x070a08
curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
&slot->results->auth_avail);
#else
slot->results->auth_avail = 0;
#endif
curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
&slot->results->http_connectcode);
}
/* Run callback if appropriate */
if (slot->callback_func != NULL)
slot->callback_func(slot->callback_data);
}
static void xmulti_remove_handle(struct active_request_slot *slot)
{
#ifdef USE_CURL_MULTI
curl_multi_remove_handle(curlm, slot->curl);
#endif
}
#ifdef USE_CURL_MULTI
static void process_curl_messages(void)
{
int num_messages;
struct active_request_slot *slot;
CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
while (curl_message != NULL) {
if (curl_message->msg == CURLMSG_DONE) {
int curl_result = curl_message->data.result;
slot = active_queue_head;
while (slot != NULL &&
slot->curl != curl_message->easy_handle)
slot = slot->next;
if (slot != NULL) {
xmulti_remove_handle(slot);
slot->curl_result = curl_result;
finish_active_slot(slot);
} else {
fprintf(stderr, "Received DONE message for unknown request!\n");
}
} else {
fprintf(stderr, "Unknown CURL message received: %d\n",
(int)curl_message->msg);
}
curl_message = curl_multi_info_read(curlm, &num_messages);
}
}
#endif
static int http_options(const char *var, const char *value, void *cb)
{
if (!strcmp("http.version", var)) {
return git_config_string(&curl_http_version, var, value);
}
if (!strcmp("http.sslverify", var)) {
curl_ssl_verify = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.sslcipherlist", var))
return git_config_string(&ssl_cipherlist, var, value);
if (!strcmp("http.sslversion", var))
return git_config_string(&ssl_version, var, value);
if (!strcmp("http.sslcert", var))
return git_config_pathname(&ssl_cert, var, value);
#if LIBCURL_VERSION_NUM >= 0x070903
if (!strcmp("http.sslkey", var))
return git_config_pathname(&ssl_key, var, value);
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
if (!strcmp("http.sslcapath", var))
return git_config_pathname(&ssl_capath, var, value);
#endif
if (!strcmp("http.sslcainfo", var))
return git_config_pathname(&ssl_cainfo, var, value);
if (!strcmp("http.sslcertpasswordprotected", var)) {
ssl_cert_password_required = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.ssltry", var)) {
curl_ssl_try = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.sslbackend", var)) {
free(http_ssl_backend);
http_ssl_backend = xstrdup_or_null(value);
return 0;
}
if (!strcmp("http.schannelcheckrevoke", var)) {
http_schannel_check_revoke = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.schannelusesslcainfo", var)) {
http_schannel_use_ssl_cainfo = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.minsessions", var)) {
min_curl_sessions = git_config_int(var, value);
#ifndef USE_CURL_MULTI
if (min_curl_sessions > 1)
min_curl_sessions = 1;
#endif
return 0;
}
#ifdef USE_CURL_MULTI
if (!strcmp("http.maxrequests", var)) {
max_requests = git_config_int(var, value);
return 0;
}
#endif
if (!strcmp("http.lowspeedlimit", var)) {
curl_low_speed_limit = (long)git_config_int(var, value);
return 0;
}
if (!strcmp("http.lowspeedtime", var)) {
curl_low_speed_time = (long)git_config_int(var, value);
return 0;
}
if (!strcmp("http.noepsv", var)) {
curl_ftp_no_epsv = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.proxy", var))
return git_config_string(&curl_http_proxy, var, value);
if (!strcmp("http.proxyauthmethod", var))
return git_config_string(&http_proxy_authmethod, var, value);
if (!strcmp("http.cookiefile", var))
return git_config_pathname(&curl_cookie_file, var, value);
if (!strcmp("http.savecookies", var)) {
curl_save_cookies = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.postbuffer", var)) {
http_post_buffer = git_config_ssize_t(var, value);
if (http_post_buffer < 0)
warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
if (http_post_buffer < LARGE_PACKET_MAX)
http_post_buffer = LARGE_PACKET_MAX;
return 0;
}
if (!strcmp("http.useragent", var))
return git_config_string(&user_agent, var, value);
if (!strcmp("http.emptyauth", var)) {
if (value && !strcmp("auto", value))
curl_empty_auth = -1;
else
curl_empty_auth = git_config_bool(var, value);
return 0;
}
if (!strcmp("http.delegation", var)) {
#ifdef CURLGSSAPI_DELEGATION_FLAG
return git_config_string(&curl_deleg, var, value);
#else
warning(_("Delegation control is not supported with cURL < 7.22.0"));
return 0;
#endif
}
if (!strcmp("http.pinnedpubkey", var)) {
#if LIBCURL_VERSION_NUM >= 0x072c00
return git_config_pathname(&ssl_pinnedkey, var, value);
#else
warning(_("Public key pinning not supported with cURL < 7.44.0"));
return 0;
#endif
}
if (!strcmp("http.extraheader", var)) {
if (!value) {
return config_error_nonbool(var);
} else if (!*value) {
curl_slist_free_all(extra_http_headers);
extra_http_headers = NULL;
} else {
extra_http_headers =
curl_slist_append(extra_http_headers, value);
}
return 0;
}
if (!strcmp("http.followredirects", var)) {
if (value && !strcmp(value, "initial"))
http_follow_config = HTTP_FOLLOW_INITIAL;
else if (git_config_bool(var, value))
http_follow_config = HTTP_FOLLOW_ALWAYS;
else
http_follow_config = HTTP_FOLLOW_NONE;
return 0;
}
/* Fall back on the default ones */
return git_default_config(var, value, cb);
}
static int curl_empty_auth_enabled(void)
{
if (curl_empty_auth >= 0)
return curl_empty_auth;
#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
/*
* Our libcurl is too old to do AUTH_ANY in the first place;
* just default to turning the feature off.
*/
#else
/*
* In the automatic case, kick in the empty-auth
* hack as long as we would potentially try some
* method more exotic than "Basic" or "Digest".
*
* But only do this when this is our second or
* subsequent request, as by then we know what
* methods are available.
*/
if (http_auth_methods_restricted &&
(http_auth_methods & ~empty_auth_useless))
return 1;
#endif
return 0;
}
static void init_curl_http_auth(CURL *result)
{
if (!http_auth.username || !*http_auth.username) {
if (curl_empty_auth_enabled())
curl_easy_setopt(result, CURLOPT_USERPWD, ":");
return;
}
credential_fill(&http_auth);
#if LIBCURL_VERSION_NUM >= 0x071301
curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
#else
{
static struct strbuf up = STRBUF_INIT;
/*
* Note that we assume we only ever have a single set of
* credentials in a given program run, so we do not have
* to worry about updating this buffer, only setting its
* initial value.
*/
if (!up.len)
strbuf_addf(&up, "%s:%s",
http_auth.username, http_auth.password);
curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
}
#endif
}
/* *var must be free-able */
static void var_override(const char **var, char *value)
{
if (value) {
free((void *)*var);
*var = xstrdup(value);
}
}
static void set_proxyauth_name_password(CURL *result)
{
#if LIBCURL_VERSION_NUM >= 0x071301
curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
proxy_auth.username);
curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
proxy_auth.password);
#else
struct strbuf s = STRBUF_INIT;
strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
strbuf_addch(&s, ':');
strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
curl_proxyuserpwd = strbuf_detach(&s, NULL);
curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
#endif
}
static void init_curl_proxy_auth(CURL *result)
{
if (proxy_auth.username) {
if (!proxy_auth.password)
credential_fill(&proxy_auth);
set_proxyauth_name_password(result);
}
var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
if (http_proxy_authmethod) {
int i;
for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
curl_easy_setopt(result, CURLOPT_PROXYAUTH,
proxy_authmethods[i].curlauth_param);
break;
}
}
if (i == ARRAY_SIZE(proxy_authmethods)) {
warning("unsupported proxy authentication method %s: using anyauth",
http_proxy_authmethod);
curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
}
}
else
curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
#endif
}
static int has_cert_password(void)
{
if (ssl_cert == NULL || ssl_cert_password_required != 1)
return 0;
if (!cert_auth.password) {
cert_auth.protocol = xstrdup("cert");
cert_auth.username = xstrdup("");
cert_auth.path = xstrdup(ssl_cert);
credential_fill(&cert_auth);
}
return 1;
}
#if LIBCURL_VERSION_NUM >= 0x071900
static void set_curl_keepalive(CURL *c)
{
curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
}
#elif LIBCURL_VERSION_NUM >= 0x071000
static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
{
int ka = 1;
int rc;
socklen_t len = (socklen_t)sizeof(ka);
if (type != CURLSOCKTYPE_IPCXN)
return 0;
rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
if (rc < 0)
warning_errno("unable to set SO_KEEPALIVE on socket");
return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
}
static void set_curl_keepalive(CURL *c)
{
curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
}
#else
static void set_curl_keepalive(CURL *c)
{
/* not supported on older curl versions */
}
#endif
static void redact_sensitive_header(struct strbuf *header)
{
const char *sensitive_header;
if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
/* The first token is the type, which is OK to log */
while (isspace(*sensitive_header))
sensitive_header++;
while (*sensitive_header && !isspace(*sensitive_header))
sensitive_header++;
/* Everything else is opaque and possibly sensitive */
strbuf_setlen(header, sensitive_header - header->buf);
strbuf_addstr(header, " <redacted>");
} else if (cookies_to_redact.nr &&
skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
struct strbuf redacted_header = STRBUF_INIT;
char *cookie;
while (isspace(*sensitive_header))
sensitive_header++;
/*
* The contents of header starting from sensitive_header will
* subsequently be overridden, so it is fine to mutate this
* string (hence the assignment to "char *").
*/
cookie = (char *) sensitive_header;
while (cookie) {
char *equals;
char *semicolon = strstr(cookie, "; ");
if (semicolon)
*semicolon = 0;
equals = strchrnul(cookie, '=');
if (!equals) {
/* invalid cookie, just append and continue */
strbuf_addstr(&redacted_header, cookie);
continue;
}
*equals = 0; /* temporarily set to NUL for lookup */
if (string_list_lookup(&cookies_to_redact, cookie)) {
strbuf_addstr(&redacted_header, cookie);
strbuf_addstr(&redacted_header, "=<redacted>");
} else {
*equals = '=';
strbuf_addstr(&redacted_header, cookie);
}
if (semicolon) {
/*
* There are more cookies. (Or, for some
* reason, the input string ends in "; ".)
*/
strbuf_addstr(&redacted_header, "; ");
cookie = semicolon + strlen("; ");
} else {
cookie = NULL;
}
}
strbuf_setlen(header, sensitive_header - header->buf);
strbuf_addbuf(header, &redacted_header);
}
}
static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
{
struct strbuf out = STRBUF_INIT;
struct strbuf **headers, **header;
strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
text, (long)size, (long)size);
trace_strbuf(&trace_curl, &out);
strbuf_reset(&out);
strbuf_add(&out, ptr, size);
headers = strbuf_split_max(&out, '\n', 0);
for (header = headers; *header; header++) {
if (hide_sensitive_header)
redact_sensitive_header(*header);
strbuf_insert((*header), 0, text, strlen(text));
strbuf_insert((*header), strlen(text), ": ", 2);
strbuf_rtrim((*header));
strbuf_addch((*header), '\n');
trace_strbuf(&trace_curl, (*header));
}
strbuf_list_free(headers);
strbuf_release(&out);
}
static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
{
size_t i;
struct strbuf out = STRBUF_INIT;
unsigned int width = 60;
strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
text, (long)size, (long)size);
trace_strbuf(&trace_curl, &out);
for (i = 0; i < size; i += width) {
size_t w;
strbuf_reset(&out);
strbuf_addf(&out, "%s: ", text);
for (w = 0; (w < width) && (i + w < size); w++) {
unsigned char ch = ptr[i + w];
strbuf_addch(&out,
(ch >= 0x20) && (ch < 0x80)
? ch : '.');
}
strbuf_addch(&out, '\n');
trace_strbuf(&trace_curl, &out);
}
strbuf_release(&out);
}
static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
{
const char *text;
enum { NO_FILTER = 0, DO_FILTER = 1 };
switch (type) {
case CURLINFO_TEXT:
trace_printf_key(&trace_curl, "== Info: %s", data);
break;
case CURLINFO_HEADER_OUT:
text = "=> Send header";
curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
break;
case CURLINFO_DATA_OUT:
if (trace_curl_data) {
text = "=> Send data";
curl_dump_data(text, (unsigned char *)data, size);
}
break;
case CURLINFO_SSL_DATA_OUT:
if (trace_curl_data) {
text = "=> Send SSL data";
curl_dump_data(text, (unsigned char *)data, size);
}
break;
case CURLINFO_HEADER_IN:
text = "<= Recv header";
curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
break;
case CURLINFO_DATA_IN:
if (trace_curl_data) {
text = "<= Recv data";
curl_dump_data(text, (unsigned char *)data, size);
}
break;
case CURLINFO_SSL_DATA_IN:
if (trace_curl_data) {
text = "<= Recv SSL data";
curl_dump_data(text, (unsigned char *)data, size);
}
break;
default: /* we ignore unknown types by default */
return 0;
}
return 0;
}
void setup_curl_trace(CURL *handle)
{
if (!trace_want(&trace_curl))
return;
curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
}
#ifdef CURLPROTO_HTTP
static long get_curl_allowed_protocols(int from_user)
{
long allowed_protocols = 0;
if (is_transport_allowed("http", from_user))
allowed_protocols |= CURLPROTO_HTTP;
if (is_transport_allowed("https", from_user))
allowed_protocols |= CURLPROTO_HTTPS;
if (is_transport_allowed("ftp", from_user))
allowed_protocols |= CURLPROTO_FTP;
if (is_transport_allowed("ftps", from_user))
allowed_protocols |= CURLPROTO_FTPS;
return allowed_protocols;
}
#endif
#if LIBCURL_VERSION_NUM >=0x072f00
static int get_curl_http_version_opt(const char *version_string, long *opt)
{
int i;
static struct {
const char *name;
long opt_token;
} choice[] = {
{ "HTTP/1.1", CURL_HTTP_VERSION_1_1 },
{ "HTTP/2", CURL_HTTP_VERSION_2 }
};
for (i = 0; i < ARRAY_SIZE(choice); i++) {
if (!strcmp(version_string, choice[i].name)) {
*opt = choice[i].opt_token;
return 0;
}
}
warning("unknown value given to http.version: '%s'", version_string);
return -1; /* not found */
}
#endif
static CURL *get_curl_handle(void)
{
CURL *result = curl_easy_init();
if (!result)
die("curl_easy_init failed");
if (!curl_ssl_verify) {
curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
} else {
/* Verify authenticity of the peer's certificate */
curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
/* The name in the cert must match whom we tried to connect */
curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
}
#if LIBCURL_VERSION_NUM >= 0x072f00 // 7.47.0
if (curl_http_version) {
long opt;
if (!get_curl_http_version_opt(curl_http_version, &opt)) {
/* Set request use http version */
curl_easy_setopt(result, CURLOPT_HTTP_VERSION, opt);
}
}
#endif
#if LIBCURL_VERSION_NUM >= 0x070907
curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
#endif
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
#endif
#ifdef CURLGSSAPI_DELEGATION_FLAG
if (curl_deleg) {
int i;
for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
curl_deleg_levels[i].curl_deleg_param);
break;
}
}
if (i == ARRAY_SIZE(curl_deleg_levels))
warning("Unknown delegation method '%s': using default",
curl_deleg);
}
#endif
if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
!http_schannel_check_revoke) {
#if LIBCURL_VERSION_NUM >= 0x072c00
curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
#else
warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0"));
#endif
}
if (http_proactive_auth)
init_curl_http_auth(result);
if (getenv("GIT_SSL_VERSION"))
ssl_version = getenv("GIT_SSL_VERSION");
if (ssl_version && *ssl_version) {
int i;
for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
if (!strcmp(ssl_version, sslversions[i].name)) {
curl_easy_setopt(result, CURLOPT_SSLVERSION,
sslversions[i].ssl_version);
break;
}
}
if (i == ARRAY_SIZE(sslversions))
warning("unsupported ssl version %s: using default",
ssl_version);
}
if (getenv("GIT_SSL_CIPHER_LIST"))
ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
if (ssl_cipherlist != NULL && *ssl_cipherlist)
curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
ssl_cipherlist);
if (ssl_cert != NULL)
curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
if (has_cert_password())
curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
#if LIBCURL_VERSION_NUM >= 0x070903
if (ssl_key != NULL)
curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
if (ssl_capath != NULL)
curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
#endif
#if LIBCURL_VERSION_NUM >= 0x072c00
if (ssl_pinnedkey != NULL)
curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
#endif
if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
!http_schannel_use_ssl_cainfo) {
curl_easy_setopt(result, CURLOPT_CAINFO, NULL);
#if LIBCURL_VERSION_NUM >= 0x073400
curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL);
#endif
} else if (ssl_cainfo != NULL)
curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
curl_low_speed_limit);
curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
curl_low_speed_time);
}
curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
#if LIBCURL_VERSION_NUM >= 0x071301
curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
#elif LIBCURL_VERSION_NUM >= 0x071101
curl_easy_setopt(result, CURLOPT_POST301, 1);
#endif
#ifdef CURLPROTO_HTTP
curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
get_curl_allowed_protocols(0));
curl_easy_setopt(result, CURLOPT_PROTOCOLS,
get_curl_allowed_protocols(-1));
#else
warning(_("Protocol restrictions not supported with cURL < 7.19.4"));
#endif
if (getenv("GIT_CURL_VERBOSE"))
curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
setup_curl_trace(result);
if (getenv("GIT_TRACE_CURL_NO_DATA"))
trace_curl_data = 0;
if (getenv("GIT_REDACT_COOKIES")) {
string_list_split(&cookies_to_redact,
getenv("GIT_REDACT_COOKIES"), ',', -1);
string_list_sort(&cookies_to_redact);
}
curl_easy_setopt(result, CURLOPT_USERAGENT,
user_agent ? user_agent : git_user_agent());
if (curl_ftp_no_epsv)
curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
#ifdef CURLOPT_USE_SSL
if (curl_ssl_try)
curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
#endif
/*
* CURL also examines these variables as a fallback; but we need to query
* them here in order to decide whether to prompt for missing password (cf.
* init_curl_proxy_auth()).
*
* Unlike many other common environment variables, these are historically
* lowercase only. It appears that CURL did not know this and implemented
* only uppercase variants, which was later corrected to take both - with
* the exception of http_proxy, which is lowercase only also in CURL. As
* the lowercase versions are the historical quasi-standard, they take
* precedence here, as in CURL.
*/
if (!curl_http_proxy) {
if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
var_override(&curl_http_proxy, getenv("https_proxy"));
} else {
var_override(&curl_http_proxy, getenv("http_proxy"));
}
if (!curl_http_proxy) {
var_override(&curl_http_proxy, getenv("ALL_PROXY"));
var_override(&curl_http_proxy, getenv("all_proxy"));
}
}
if (curl_http_proxy && curl_http_proxy[0] == '\0') {
/*
* Handle case with the empty http.proxy value here to keep
* common code clean.
* NB: empty option disables proxying at all.
*/
curl_easy_setopt(result, CURLOPT_PROXY, "");
} else if (curl_http_proxy) {
#if LIBCURL_VERSION_NUM >= 0x071800
if (starts_with(curl_http_proxy, "socks5h"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
else if (starts_with(curl_http_proxy, "socks5"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
else if (starts_with(curl_http_proxy, "socks4a"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
else if (starts_with(curl_http_proxy, "socks"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
#endif
#if LIBCURL_VERSION_NUM >= 0x073400
else if (starts_with(curl_http_proxy, "https"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
#endif
if (strstr(curl_http_proxy, "://"))
credential_from_url(&proxy_auth, curl_http_proxy);
else {
struct strbuf url = STRBUF_INIT;
strbuf_addf(&url, "http://%s", curl_http_proxy);
credential_from_url(&proxy_auth, url.buf);
strbuf_release(&url);
}
if (!proxy_auth.host)
die("Invalid proxy URL '%s'", curl_http_proxy);
curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
#if LIBCURL_VERSION_NUM >= 0x071304
var_override(&curl_no_proxy, getenv("NO_PROXY"));
var_override(&curl_no_proxy, getenv("no_proxy"));
curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
#endif
}
init_curl_proxy_auth(result);
set_curl_keepalive(result);
return result;
}
static void set_from_env(const char **var, const char *envname)
{
const char *val = getenv(envname);
if (val)
*var = val;
}
void http_init(struct remote *remote, const char *url, int proactive_auth)
{
char *low_speed_limit;
char *low_speed_time;
char *normalized_url;
struct urlmatch_config config = { STRING_LIST_INIT_DUP };
config.section = "http";
config.key = NULL;
config.collect_fn = http_options;
config.cascade_fn = git_default_config;
config.cb = NULL;
http_is_verbose = 0;
normalized_url = url_normalize(url, &config.url);
git_config(urlmatch_config_entry, &config);
free(normalized_url);
#if LIBCURL_VERSION_NUM >= 0x073800
if (http_ssl_backend) {
const curl_ssl_backend **backends;
struct strbuf buf = STRBUF_INIT;
int i;
switch (curl_global_sslset(-1, http_ssl_backend, &backends)) {
case CURLSSLSET_UNKNOWN_BACKEND:
strbuf_addf(&buf, _("Unsupported SSL backend '%s'. "
"Supported SSL backends:"),
http_ssl_backend);
for (i = 0; backends[i]; i++)
strbuf_addf(&buf, "\n\t%s", backends[i]->name);
die("%s", buf.buf);
case CURLSSLSET_NO_BACKENDS:
die(_("Could not set SSL backend to '%s': "
"cURL was built without SSL backends"),
http_ssl_backend);
case CURLSSLSET_TOO_LATE:
die(_("Could not set SSL backend to '%s': already set"),
http_ssl_backend);
case CURLSSLSET_OK:
break; /* Okay! */
}
}
#endif
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);
if (remote)
var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
pragma_header = curl_slist_append(http_copy_default_headers(),
"Pragma: no-cache");
no_pragma_header = curl_slist_append(http_copy_default_headers(),
"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) {
xmulti_remove_handle(slot);
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(extra_http_headers);
extra_http_headers = NULL;
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 (proxy_auth.password) {
memset(proxy_auth.password, 0, strlen(proxy_auth.password));
FREE_AND_NULL(proxy_auth.password);
}
free((void *)curl_proxyuserpwd);
curl_proxyuserpwd = NULL;
free((void *)http_proxy_authmethod);
http_proxy_authmethod = NULL;
if (cert_auth.password != NULL) {
memset(cert_auth.password, 0, strlen(cert_auth.password));
FREE_AND_NULL(cert_auth.password);
}
ssl_cert_password_required = 0;
FREE_AND_NULL(cached_accept_language);
}
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);
curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
/*
* Default following to off unless "ALWAYS" is configured; this gives
* callers a sane starting point, and they can tweak for individual
* HTTP_FOLLOW_* cases themselves.
*/
if (http_follow_config == HTTP_FOLLOW_ALWAYS)
curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
else
curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
#if LIBCURL_VERSION_NUM >= 0x070a08
curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
#endif
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
#endif
if (http_auth.password || curl_empty_auth_enabled())
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) {
warning("curl_multi_add_handle failed: %s",
curl_multi_strerror(curlm_result));
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_fill = xmalloc(sizeof(*new_fill));
struct fill_chain **linkp = &fill_cfg;
new_fill->data = data;
new_fill->fill = fill;
new_fill->next = NULL;
while (*linkp)
linkp = &(*linkp)->next;
*linkp = new_fill;
}
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) {
xmulti_remove_handle(slot);
if (curl_session_count > min_curl_sessions) {
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_addstr(buf, 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);
}
void normalize_curl_result(CURLcode *result, long http_code,
char *errorstr, size_t errorlen)
{
/*
* 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.
*
* Likewise, if we see a redirect (30x code), that means we turned off
* redirect-following, and we should treat the result as an error.
*/
if (*result == CURLE_OK && http_code >= 300) {
*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.
*/
xsnprintf(errorstr, errorlen,
"The requested URL returned error: %ld",
http_code);
}
}
static int handle_curl_result(struct slot_results *results)
{
normalize_curl_result(&results->curl_result, results->http_code,
curl_errorstr, sizeof(curl_errorstr));
if (results->curl_result == CURLE_OK) {
credential_approve(&http_auth);
if (proxy_auth.password)
credential_approve(&proxy_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;
if (results->auth_avail) {
http_auth_methods &= results->auth_avail;
http_auth_methods_restricted = 1;
}
#endif
return HTTP_REAUTH;
}
} else {
if (results->http_connectcode == 407)
credential_reject(&proxy_auth);
#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)) {
xsnprintf(curl_errorstr, sizeof(curl_errorstr),
"failed to start HTTP request");
return HTTP_START_FAILED;
}
run_active_slot(slot);
return handle_curl_result(results);
}
struct curl_slist *http_copy_default_headers(void)
{
struct curl_slist *headers = NULL, *h;
for (h = extra_http_headers; h; h = h->next)
headers = curl_slist_append(headers, h->data);
return headers;
}
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;
}
static void http_opt_request_remainder(CURL *curl, off_t pos)
{
char buf[128];
xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
curl_easy_setopt(curl, CURLOPT_RANGE, buf);
}
/* 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 = http_copy_default_headers();
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) {
off_t posn = ftello(result);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
fwrite);
if (posn > 0)
http_opt_request_remainder(slot->curl, posn);
} 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->initial_request &&
http_follow_config == HTTP_FOLLOW_INITIAL)
curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
headers = curl_slist_append(headers, buf.buf);
/* Add additional headers here */
if (options && options->extra_headers) {
const struct string_list_item *item;
for_each_string_list_item(item, options->extra_headers) {
headers = curl_slist_append(headers, item->string);
}
}
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
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 die. There's not much we can do, such a
* scheme is unlikely to represent a real git repository, and failing to
* rewrite the base opens options for malicious redirects to do funny things.
*/
static int update_url_from_redirect(struct strbuf *base,
const char *asked,
const struct strbuf *got)
{
const char *tail;
size_t new_len;
if (!strcmp(asked, got->buf))
return 0;
if (!skip_prefix(asked, base->buf, &tail))
BUG("update_url_from_redirect: %s is not a superset of %s",
asked, base->buf);
new_len = got->len;
if (!strip_suffix_mem(got->buf, &new_len, tail))
die(_("unable to update url base from redirection:\n"
" asked for: %s\n"
" redirect: %s"),
asked, got->buf);
strbuf_reset(base);
strbuf_add(base, got->buf, new_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 (ret != HTTP_OK && ret != HTTP_REAUTH)
return ret;
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;
/*
* The previous request may have put cruft into our output stream; we
* should clear it out before making our next request.
*/
switch (target) {
case HTTP_REQUEST_STRBUF:
strbuf_reset(result);
break;
case HTTP_REQUEST_FILE:
if (fflush(result)) {
error_errno("unable to flush a file");
return HTTP_START_FAILED;
}
rewind(result);
if (ftruncate(fileno(result), 0) < 0) {
error_errno("unable to truncate a file");
return HTTP_START_FAILED;
}
break;
default:
BUG("Unknown http_request target");
}
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_oid_hex(buffer.buf, &ref->old_oid);
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_AND_NULL(tmp);
}
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 hash[GIT_MAX_RAWSZ];
const unsigned hexsz = the_hash_algo->hexsz;
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 + hexsz + 12 <= buf.len &&
starts_with(data + i, " pack-") &&
starts_with(data + i + hexsz + 6, ".pack\n")) {
get_sha1_hex(data + i + 6, hash);
fetch_and_setup_pack_index(packs_head, hash,
base_url);
i += hexsz + 11;
break;
}
default:
while (i < buf.len && data[i] != '\n')
i++;
}
i++;
}
cleanup:
free(url);
return ret;
}
void release_http_pack_request(struct http_pack_request *preq)
{
if (preq->packfile != NULL) {
fclose(preq->packfile);
preq->packfile = NULL;
}
preq->slot = NULL;
strbuf_release(&preq->tmpfile);
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;
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.buf, ".pack.temp", &len))
BUG("pack tmpfile does not end in .pack.temp?");
tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile.buf);
argv_array_push(&ip.args, "index-pack");
argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
argv_array_push(&ip.args, preq->tmpfile.buf);
ip.git_cmd = 1;
ip.no_stdin = 1;
ip.no_stdout = 1;
if (run_command(&ip)) {
unlink(preq->tmpfile.buf);
unlink(tmp_idx);
free(tmp_idx);
return -1;
}
unlink(sha1_pack_index_name(p->sha1));
if (finalize_object_file(preq->tmpfile.buf, sha1_pack_name(p->sha1))
|| finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
free(tmp_idx);
return -1;
}
install_packed_git(the_repository, p);
free(tmp_idx);
return 0;
}
struct http_pack_request *new_http_pack_request(
struct packed_git *target, const char *base_url)
{
off_t prev_posn = 0;
struct strbuf buf = STRBUF_INIT;
struct http_pack_request *preq;
preq = xcalloc(1, sizeof(*preq));
strbuf_init(&preq->tmpfile, 0);
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);
strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(target->sha1));
preq->packfile = fopen(preq->tmpfile.buf, "a");
if (!preq->packfile) {
error("Unable to open local file %s for pack",
preq->tmpfile.buf);
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 = ftello(preq->packfile);
if (prev_posn>0) {
if (http_is_verbose)
fprintf(stderr,
"Resuming fetch of pack %s at byte %"PRIuMAX"\n",
sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
http_opt_request_remainder(preq->slot->curl, prev_posn);
}
return preq;
abort:
strbuf_release(&preq->tmpfile);
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 = data;
struct active_request_slot *slot = freq->slot;
if (slot) {
CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
&slot->http_code);
if (c != CURLE_OK)
BUG("curl_easy_getinfo for HTTP code failed: %s",
curl_easy_strerror(c));
if (slot->http_code >= 300)
return size;
}
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,
const struct object_id *oid)
{
char *hex = oid_to_hex(oid);
struct strbuf filename = STRBUF_INIT;
struct strbuf prevfile = STRBUF_INIT;
int prevlocal;
char prev_buf[PREV_BUF_SIZE];
ssize_t prev_read = 0;
off_t prev_posn = 0;
struct http_object_request *freq;
freq = xcalloc(1, sizeof(*freq));
strbuf_init(&freq->tmpfile, 0);
oidcpy(&freq->oid, oid);
freq->localfile = -1;
loose_object_path(the_repository, &filename, oid);
strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
strbuf_addf(&prevfile, "%s.prev", filename.buf);
unlink_or_warn(prevfile.buf);
rename(freq->tmpfile.buf, prevfile.buf);
unlink_or_warn(freq->tmpfile.buf);
strbuf_release(&filename);
if (freq->localfile != -1)
error("fd leakage in start: %d", freq->localfile);
freq->localfile = open(freq->tmpfile.buf,
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.buf, '/');
if (dir) {
*dir = 0;
mkdir(freq->tmpfile.buf, 0777);
*dir = '/';
}
freq->localfile = open(freq->tmpfile.buf,
O_WRONLY | O_CREAT | O_EXCL, 0666);
}
if (freq->localfile < 0) {
error_errno("Couldn't create temporary file %s",
freq->tmpfile.buf);
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.buf, 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.buf);
strbuf_release(&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_errno("Couldn't truncate temporary file %s",
freq->tmpfile.buf);
goto abort;
}
}
}
freq->slot = get_active_slot();
curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
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 %"PRIuMAX"\n",
hex, (uintmax_t)prev_posn);
http_opt_request_remainder(freq->slot->curl, prev_posn);
}
return freq;
abort:
strbuf_release(&prevfile);
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;
struct strbuf filename = STRBUF_INIT;
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.buf, &st) == 0)
if (st.st_size == 0)
unlink_or_warn(freq->tmpfile.buf);
return -1;
}
git_inflate_end(&freq->stream);
git_SHA1_Final(freq->real_oid.hash, &freq->c);
if (freq->zret != Z_STREAM_END) {
unlink_or_warn(freq->tmpfile.buf);
return -1;
}
if (!oideq(&freq->oid, &freq->real_oid)) {
unlink_or_warn(freq->tmpfile.buf);
return -1;
}
loose_object_path(the_repository, &filename, &freq->oid);
freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
strbuf_release(&filename);
return freq->rename;
}
void abort_http_object_request(struct http_object_request *freq)
{
unlink_or_warn(freq->tmpfile.buf);
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;
}
FREE_AND_NULL(freq->url);
if (freq->slot != NULL) {
freq->slot->callback_func = NULL;
freq->slot->callback_data = NULL;
release_active_slot(freq->slot);
freq->slot = NULL;
}
strbuf_release(&freq->tmpfile);
}
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