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git/http.c
Patrick Steinhardt 8d3a7ce441 http: do not assign string constant to non-const field 
In `write_accept_language()`, we put all acceptable languages into an
array. While all entries in that array are allocated strings, the final
entry in that array is a string constant. This is fine because we
explicitly skip over the last entry when freeing the array, but will
cause warnings once we enable `-Wwrite-strings`.

Adapt the code to also allocate the final entry.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-07 10:30:53 -07:00

2757 lines
72 KiB
C
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#include "git-compat-util.h"
#include "git-curl-compat.h"
#include "hex.h"
#include "http.h"
#include "config.h"
#include "pack.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 "trace.h"
#include "transport.h"
#include "packfile.h"
#include "string-list.h"
#include "object-file.h"
#include "object-store-ll.h"
static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
static int trace_curl_data = 1;
static int trace_curl_redact = 1;
long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
int active_requests;
int http_is_verbose;
ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
static int min_curl_sessions = 1;
static int curl_session_count;
static int max_requests = -1;
static CURLM *curlm;
static CURL *curl_default;
#define PREV_BUF_SIZE 4096
char curl_errorstr[CURL_ERROR_SIZE];
static int curl_ssl_verify = -1;
static int curl_ssl_try;
static char *curl_http_version;
static char *ssl_cert;
static char *ssl_cert_type;
static char *ssl_cipherlist;
static char *ssl_version;
static struct {
const char *name;
long ssl_version;
} sslversions[] = {
{ "sslv2", CURL_SSLVERSION_SSLv2 },
{ "sslv3", CURL_SSLVERSION_SSLv3 },
{ "tlsv1", CURL_SSLVERSION_TLSv1 },
#ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_0
{ "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
{ "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
{ "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
#endif
#ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_3
{ "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
#endif
};
static char *ssl_key;
static char *ssl_key_type;
static char *ssl_capath;
static char *curl_no_proxy;
#ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
static char *ssl_pinnedkey;
#endif
static char *ssl_cainfo;
static long curl_low_speed_limit = -1;
static long curl_low_speed_time = -1;
static int curl_ftp_no_epsv;
static char *curl_http_proxy;
static char *http_proxy_authmethod;
static char *http_proxy_ssl_cert;
static char *http_proxy_ssl_key;
static char *http_proxy_ssl_ca_info;
static struct credential proxy_cert_auth = CREDENTIAL_INIT;
static int proxy_ssl_cert_password_required;
static struct {
const char *name;
long curlauth_param;
} proxy_authmethods[] = {
{ "basic", CURLAUTH_BASIC },
{ "digest", CURLAUTH_DIGEST },
{ "negotiate", CURLAUTH_GSSNEGOTIATE },
{ "ntlm", CURLAUTH_NTLM },
{ "anyauth", CURLAUTH_ANY },
/*
* 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 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 char *curl_cookie_file;
static int curl_save_cookies;
struct credential http_auth = CREDENTIAL_INIT;
static int http_proactive_auth;
static char *user_agent;
static int curl_empty_auth = -1;
enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
static struct credential cert_auth = CREDENTIAL_INIT;
static int ssl_cert_password_required;
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
| CURLAUTH_DIGEST_IE
| CURLAUTH_DIGEST;
static struct curl_slist *pragma_header;
static struct string_list extra_http_headers = STRING_LIST_INIT_DUP;
static struct curl_slist *host_resolutions;
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 / eltsize;
}
int seek_buffer(void *clientp, curl_off_t offset, int origin)
{
struct buffer *buffer = clientp;
if (origin != SEEK_SET)
BUG("seek_buffer only handles SEEK_SET");
if (offset < 0 || offset >= buffer->buf.len) {
error("curl seek would be outside of buffer");
return CURL_SEEKFUNC_FAIL;
}
buffer->posn = offset;
return CURL_SEEKFUNC_OK;
}
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 nmemb;
}
/*
* A folded header continuation line starts with any number of spaces or
* horizontal tab characters (SP or HTAB) as per RFC 7230 section 3.2.
* It is not a continuation line if the line starts with any other character.
*/
static inline int is_hdr_continuation(const char *ptr, const size_t size)
{
return size && (*ptr == ' ' || *ptr == '\t');
}
static size_t fwrite_wwwauth(char *ptr, size_t eltsize, size_t nmemb, void *p UNUSED)
{
size_t size = eltsize * nmemb;
struct strvec *values = &http_auth.wwwauth_headers;
struct strbuf buf = STRBUF_INIT;
const char *val;
size_t val_len;
/*
* Header lines may not come NULL-terminated from libcurl so we must
* limit all scans to the maximum length of the header line, or leverage
* strbufs for all operations.
*
* In addition, it is possible that header values can be split over
* multiple lines as per RFC 7230. 'Line folding' has been deprecated
* but older servers may still emit them. A continuation header field
* value is identified as starting with a space or horizontal tab.
*
* The formal definition of a header field as given in RFC 7230 is:
*
* header-field = field-name ":" OWS field-value OWS
*
* field-name = token
* field-value = *( field-content / obs-fold )
* field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
* field-vchar = VCHAR / obs-text
*
* obs-fold = CRLF 1*( SP / HTAB )
* ; obsolete line folding
* ; see Section 3.2.4
*/
/* Start of a new WWW-Authenticate header */
if (skip_iprefix_mem(ptr, size, "www-authenticate:", &val, &val_len)) {
strbuf_add(&buf, val, val_len);
/*
* Strip the CRLF that should be present at the end of each
* field as well as any trailing or leading whitespace from the
* value.
*/
strbuf_trim(&buf);
strvec_push(values, buf.buf);
http_auth.header_is_last_match = 1;
goto exit;
}
/*
* This line could be a continuation of the previously matched header
* field. If this is the case then we should append this value to the
* end of the previously consumed value.
*/
if (http_auth.header_is_last_match && is_hdr_continuation(ptr, size)) {
/*
* Trim the CRLF and any leading or trailing from this line.
*/
strbuf_add(&buf, ptr, size);
strbuf_trim(&buf);
/*
* At this point we should always have at least one existing
* value, even if it is empty. Do not bother appending the new
* value if this continuation header is itself empty.
*/
if (!values->nr) {
BUG("should have at least one existing header value");
} else if (buf.len) {
char *prev = xstrdup(values->v[values->nr - 1]);
/* Join two non-empty values with a single space. */
const char *const sp = *prev ? " " : "";
strvec_pop(values);
strvec_pushf(values, "%s%s%s", prev, sp, buf.buf);
free(prev);
}
goto exit;
}
/* Not a continuation of a previously matched auth header line. */
http_auth.header_is_last_match = 0;
/*
* If this is a HTTP status line and not a header field, this signals
* a different HTTP response. libcurl writes all the output of all
* response headers of all responses, including redirects.
* We only care about the last HTTP request response's headers so clear
* the existing array.
*/
if (skip_iprefix_mem(ptr, size, "http/", &val, &val_len))
strvec_clear(values);
exit:
strbuf_release(&buf);
return size;
}
size_t fwrite_null(char *ptr UNUSED, size_t eltsize UNUSED, size_t nmemb,
void *data UNUSED)
{
return nmemb;
}
static struct curl_slist *object_request_headers(void)
{
return curl_slist_append(http_copy_default_headers(), "Pragma:");
}
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)
(*slot->finished) = 1;
/* Store slot results so they can be read after the slot is reused */
if (slot->results) {
slot->results->curl_result = slot->curl_result;
slot->results->http_code = slot->http_code;
curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
&slot->results->auth_avail);
curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
&slot->results->http_connectcode);
}
/* Run callback if appropriate */
if (slot->callback_func)
slot->callback_func(slot->callback_data);
}
static void xmulti_remove_handle(struct active_request_slot *slot)
{
curl_multi_remove_handle(curlm, slot->curl);
}
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) {
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);
}
}
static int http_options(const char *var, const char *value,
const struct config_context *ctx, void *data)
{
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 (!strcmp("http.sslcerttype", var))
return git_config_string(&ssl_cert_type, var, value);
if (!strcmp("http.sslkey", var))
return git_config_pathname(&ssl_key, var, value);
if (!strcmp("http.sslkeytype", var))
return git_config_string(&ssl_key_type, var, value);
if (!strcmp("http.sslcapath", var))
return git_config_pathname(&ssl_capath, var, value);
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, ctx->kvi);
if (min_curl_sessions > 1)
min_curl_sessions = 1;
return 0;
}
if (!strcmp("http.maxrequests", var)) {
max_requests = git_config_int(var, value, ctx->kvi);
return 0;
}
if (!strcmp("http.lowspeedlimit", var)) {
curl_low_speed_limit = (long)git_config_int(var, value, ctx->kvi);
return 0;
}
if (!strcmp("http.lowspeedtime", var)) {
curl_low_speed_time = (long)git_config_int(var, value, ctx->kvi);
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.proxysslcert", var))
return git_config_string(&http_proxy_ssl_cert, var, value);
if (!strcmp("http.proxysslkey", var))
return git_config_string(&http_proxy_ssl_key, var, value);
if (!strcmp("http.proxysslcainfo", var))
return git_config_string(&http_proxy_ssl_ca_info, var, value);
if (!strcmp("http.proxysslcertpasswordprotected", var)) {
proxy_ssl_cert_password_required = git_config_bool(var, value);
return 0;
}
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, ctx->kvi);
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)) {
#ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
return git_config_pathname(&ssl_pinnedkey, var, value);
#else
warning(_("Public key pinning not supported with cURL < 7.39.0"));
return 0;
#endif
}
if (!strcmp("http.extraheader", var)) {
if (!value) {
return config_error_nonbool(var);
} else if (!*value) {
string_list_clear(&extra_http_headers, 0);
} else {
string_list_append(&extra_http_headers, value);
}
return 0;
}
if (!strcmp("http.curloptresolve", var)) {
if (!value) {
return config_error_nonbool(var);
} else if (!*value) {
curl_slist_free_all(host_resolutions);
host_resolutions = NULL;
} else {
host_resolutions = curl_slist_append(host_resolutions, 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, ctx, data);
}
static int curl_empty_auth_enabled(void)
{
if (curl_empty_auth >= 0)
return curl_empty_auth;
/*
* 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;
return 0;
}
struct curl_slist *http_append_auth_header(const struct credential *c,
struct curl_slist *headers)
{
if (c->authtype && c->credential) {
struct strbuf auth = STRBUF_INIT;
strbuf_addf(&auth, "Authorization: %s %s",
c->authtype, c->credential);
headers = curl_slist_append(headers, auth.buf);
strbuf_release(&auth);
}
return headers;
}
static void init_curl_http_auth(CURL *result)
{
if ((!http_auth.username || !*http_auth.username) &&
(!http_auth.credential || !*http_auth.credential)) {
if (curl_empty_auth_enabled())
curl_easy_setopt(result, CURLOPT_USERPWD, ":");
return;
}
credential_fill(&http_auth, 1);
if (http_auth.password) {
curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
}
}
/* *var must be free-able */
static void var_override(char **var, char *value)
{
if (value) {
free(*var);
*var = xstrdup(value);
}
}
static void set_proxyauth_name_password(CURL *result)
{
if (proxy_auth.password) {
curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
proxy_auth.username);
curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
proxy_auth.password);
} else if (proxy_auth.authtype && proxy_auth.credential) {
curl_easy_setopt(result, CURLOPT_PROXYHEADER,
http_append_auth_header(&proxy_auth, NULL));
}
}
static void init_curl_proxy_auth(CURL *result)
{
if (proxy_auth.username) {
if (!proxy_auth.password && !proxy_auth.credential)
credential_fill(&proxy_auth, 1);
set_proxyauth_name_password(result);
}
var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
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);
}
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.host = xstrdup("");
cert_auth.username = xstrdup("");
cert_auth.path = xstrdup(ssl_cert);
credential_fill(&cert_auth, 0);
}
return 1;
}
#ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
static int has_proxy_cert_password(void)
{
if (http_proxy_ssl_cert == NULL || proxy_ssl_cert_password_required != 1)
return 0;
if (!proxy_cert_auth.password) {
proxy_cert_auth.protocol = xstrdup("cert");
proxy_cert_auth.host = xstrdup("");
proxy_cert_auth.username = xstrdup("");
proxy_cert_auth.path = xstrdup(http_proxy_ssl_cert);
credential_fill(&proxy_cert_auth, 0);
}
return 1;
}
#endif
#ifdef GITCURL_HAVE_CURLOPT_TCP_KEEPALIVE
static void set_curl_keepalive(CURL *c)
{
curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
}
#else
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 CURL_SOCKOPT_OK;
}
static void set_curl_keepalive(CURL *c)
{
curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
}
#endif
/* Return 1 if redactions have been made, 0 otherwise. */
static int redact_sensitive_header(struct strbuf *header, size_t offset)
{
int ret = 0;
const char *sensitive_header;
if (trace_curl_redact &&
(skip_iprefix(header->buf + offset, "Authorization:", &sensitive_header) ||
skip_iprefix(header->buf + offset, "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>");
ret = 1;
} else if (trace_curl_redact &&
skip_iprefix(header->buf + offset, "Cookie:", &sensitive_header)) {
struct strbuf redacted_header = STRBUF_INIT;
const char *cookie;
while (isspace(*sensitive_header))
sensitive_header++;
cookie = 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;
}
strbuf_add(&redacted_header, cookie, equals - cookie);
strbuf_addstr(&redacted_header, "=<redacted>");
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);
ret = 1;
}
return ret;
}
static int match_curl_h2_trace(const char *line, const char **out)
{
const char *p;
/*
* curl prior to 8.1.0 gives us:
*
* h2h3 [<header-name>: <header-val>]
*
* Starting in 8.1.0, the first token became just "h2".
*/
if (skip_iprefix(line, "h2h3 [", out) ||
skip_iprefix(line, "h2 [", out))
return 1;
/*
* curl 8.3.0 uses:
* [HTTP/2] [<stream-id>] [<header-name>: <header-val>]
* where <stream-id> is numeric.
*/
if (skip_iprefix(line, "[HTTP/2] [", &p)) {
while (isdigit(*p))
p++;
if (skip_prefix(p, "] [", out))
return 1;
}
return 0;
}
/* Redact headers in info */
static void redact_sensitive_info_header(struct strbuf *header)
{
const char *sensitive_header;
if (trace_curl_redact &&
match_curl_h2_trace(header->buf, &sensitive_header)) {
if (redact_sensitive_header(header, sensitive_header - header->buf)) {
/* redaction ate our closing bracket */
strbuf_addch(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, 0);
strbuf_insertstr((*header), 0, text);
strbuf_insertstr((*header), strlen(text), ": ");
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 void curl_dump_info(char *data, size_t size)
{
struct strbuf buf = STRBUF_INIT;
strbuf_add(&buf, data, size);
redact_sensitive_info_header(&buf);
trace_printf_key(&trace_curl, "== Info: %s", buf.buf);
strbuf_release(&buf);
}
static int curl_trace(CURL *handle UNUSED, curl_infotype type,
char *data, size_t size,
void *userp UNUSED)
{
const char *text;
enum { NO_FILTER = 0, DO_FILTER = 1 };
switch (type) {
case CURLINFO_TEXT:
curl_dump_info(data, size);
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 http_trace_curl_no_data(void)
{
trace_override_envvar(&trace_curl, "1");
trace_curl_data = 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);
}
static void proto_list_append(struct strbuf *list, const char *proto)
{
if (!list)
return;
if (list->len)
strbuf_addch(list, ',');
strbuf_addstr(list, proto);
}
static long get_curl_allowed_protocols(int from_user, struct strbuf *list)
{
long bits = 0;
if (is_transport_allowed("http", from_user)) {
bits |= CURLPROTO_HTTP;
proto_list_append(list, "http");
}
if (is_transport_allowed("https", from_user)) {
bits |= CURLPROTO_HTTPS;
proto_list_append(list, "https");
}
if (is_transport_allowed("ftp", from_user)) {
bits |= CURLPROTO_FTP;
proto_list_append(list, "ftp");
}
if (is_transport_allowed("ftps", from_user)) {
bits |= CURLPROTO_FTPS;
proto_list_append(list, "ftps");
}
return bits;
}
#ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
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);
}
#ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
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
curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
#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) {
#ifdef GIT_CURL_HAVE_CURLSSLOPT_NO_REVOKE
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)
curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
if (ssl_cert_type)
curl_easy_setopt(result, CURLOPT_SSLCERTTYPE, ssl_cert_type);
if (has_cert_password())
curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
if (ssl_key)
curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
if (ssl_key_type)
curl_easy_setopt(result, CURLOPT_SSLKEYTYPE, ssl_key_type);
if (ssl_capath)
curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
#ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
if (ssl_pinnedkey)
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);
#ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL);
#endif
} else if (ssl_cainfo != NULL || http_proxy_ssl_ca_info != NULL) {
if (ssl_cainfo)
curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
#ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
if (http_proxy_ssl_ca_info)
curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, http_proxy_ssl_ca_info);
#endif
}
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);
curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
{
struct strbuf buf = STRBUF_INIT;
get_curl_allowed_protocols(0, &buf);
curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS_STR, buf.buf);
strbuf_reset(&buf);
get_curl_allowed_protocols(-1, &buf);
curl_easy_setopt(result, CURLOPT_PROTOCOLS_STR, buf.buf);
strbuf_release(&buf);
}
#else
curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
get_curl_allowed_protocols(0, NULL));
curl_easy_setopt(result, CURLOPT_PROTOCOLS,
get_curl_allowed_protocols(-1, NULL));
#endif
if (getenv("GIT_CURL_VERBOSE"))
http_trace_curl_no_data();
setup_curl_trace(result);
if (getenv("GIT_TRACE_CURL_NO_DATA"))
trace_curl_data = 0;
if (!git_env_bool("GIT_TRACE_REDACT", 1))
trace_curl_redact = 0;
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);
if (curl_ssl_try)
curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
/*
* 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 (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);
#ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
else if (starts_with(curl_http_proxy, "https")) {
curl_easy_setopt(result, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
if (http_proxy_ssl_cert)
curl_easy_setopt(result, CURLOPT_PROXY_SSLCERT, http_proxy_ssl_cert);
if (http_proxy_ssl_key)
curl_easy_setopt(result, CURLOPT_PROXY_SSLKEY, http_proxy_ssl_key);
if (has_proxy_cert_password())
curl_easy_setopt(result, CURLOPT_PROXY_KEYPASSWD, proxy_cert_auth.password);
}
#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);
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);
}
init_curl_proxy_auth(result);
set_curl_keepalive(result);
return result;
}
static void set_from_env(char **var, const char *envname)
{
const char *val = getenv(envname);
if (val) {
FREE_AND_NULL(*var);
*var = xstrdup(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 = URLMATCH_CONFIG_INIT;
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);
string_list_clear(&config.vars, 1);
#ifdef GIT_CURL_HAVE_CURLSSLSET_NO_BACKENDS
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");
{
char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
if (http_max_requests)
max_requests = atoi(http_max_requests);
}
curlm = curl_multi_init();
if (!curlm)
die("curl_multi_init failed");
if (getenv("GIT_SSL_NO_VERIFY"))
curl_ssl_verify = 0;
set_from_env(&ssl_cert, "GIT_SSL_CERT");
set_from_env(&ssl_cert_type, "GIT_SSL_CERT_TYPE");
set_from_env(&ssl_key, "GIT_SSL_KEY");
set_from_env(&ssl_key_type, "GIT_SSL_KEY_TYPE");
set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
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)
curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
if (low_speed_time)
curl_low_speed_time = strtol(low_speed_time, NULL, 10);
if (curl_ssl_verify == -1)
curl_ssl_verify = 1;
curl_session_count = 0;
if (max_requests < 1)
max_requests = DEFAULT_MAX_REQUESTS;
set_from_env(&http_proxy_ssl_cert, "GIT_PROXY_SSL_CERT");
set_from_env(&http_proxy_ssl_key, "GIT_PROXY_SSL_KEY");
set_from_env(&http_proxy_ssl_ca_info, "GIT_PROXY_SSL_CAINFO");
if (getenv("GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED"))
proxy_ssl_cert_password_required = 1;
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;
}
curl_default = get_curl_handle();
}
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) {
xmulti_remove_handle(slot);
curl_easy_cleanup(slot->curl);
}
free(slot);
slot = next;
}
active_queue_head = NULL;
curl_easy_cleanup(curl_default);
curl_multi_cleanup(curlm);
curl_global_cleanup();
string_list_clear(&extra_http_headers, 0);
curl_slist_free_all(pragma_header);
pragma_header = NULL;
curl_slist_free_all(host_resolutions);
host_resolutions = 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) {
memset(cert_auth.password, 0, strlen(cert_auth.password));
FREE_AND_NULL(cert_auth.password);
}
ssl_cert_password_required = 0;
if (proxy_cert_auth.password) {
memset(proxy_cert_auth.password, 0, strlen(proxy_cert_auth.password));
FREE_AND_NULL(proxy_cert_auth.password);
}
proxy_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;
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();
}
while (slot != NULL && slot->in_use)
slot = slot->next;
if (!slot) {
newslot = xmalloc(sizeof(*newslot));
newslot->curl = NULL;
newslot->in_use = 0;
newslot->next = NULL;
slot = active_queue_head;
if (!slot) {
active_queue_head = newslot;
} else {
while (slot->next != NULL)
slot = slot->next;
slot->next = newslot;
}
slot = newslot;
}
if (!slot->curl) {
slot->curl = curl_easy_duphandle(curl_default);
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_RESOLVE, host_resolutions);
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_POSTFIELDSIZE, -1L);
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);
curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
if (http_auth.password || http_auth.credential || curl_empty_auth_enabled())
init_curl_http_auth(slot->curl);
return slot;
}
int start_active_slot(struct active_request_slot *slot)
{
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);
return 1;
}
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();
}
}
void run_active_slot(struct active_request_slot *slot)
{
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) {
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;
}
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);
}
}
/*
* The value of slot->finished we set before the loop was used
* to set our "finished" variable when our request completed.
*
* 1. The slot may not have been reused for another requst
* yet, in which case it still has &finished.
*
* 2. The slot may already be in-use to serve another request,
* which can further be divided into two cases:
*
* (a) If call run_active_slot() hasn't been called for that
* other request, slot->finished would have been cleared
* by get_active_slot() and has NULL.
*
* (b) If the request did call run_active_slot(), then the
* call would have updated slot->finished at the beginning
* of this function, and with the clearing of the member
* below, we would find that slot->finished is now NULL.
*
* In all cases, slot->finished has no useful information to
* anybody at this point. Some compilers warn us for
* attempting to smuggle a pointer that is about to become
* invalid, i.e. &finished. We clear it here to assure them.
*/
slot->finished = NULL;
}
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--;
}
}
fill_active_slots();
}
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);
credential_approve(&proxy_auth);
credential_approve(&cert_auth);
return HTTP_OK;
} else if (results->curl_result == CURLE_SSL_CERTPROBLEM) {
/*
* We can't tell from here whether it's a bad path, bad
* certificate, bad password, or something else wrong
* with the certificate. So we reject the credential to
* avoid caching or saving a bad password.
*/
credential_reject(&cert_auth);
return HTTP_NOAUTH;
#ifdef GIT_CURL_HAVE_CURLE_SSL_PINNEDPUBKEYNOTMATCH
} else if (results->curl_result == CURLE_SSL_PINNEDPUBKEYNOTMATCH) {
return HTTP_NOMATCHPUBLICKEY;
#endif
} else if (missing_target(results))
return HTTP_MISSING_TARGET;
else if (results->http_code == 401) {
if ((http_auth.username && http_auth.password) ||\
(http_auth.authtype && http_auth.credential)) {
if (http_auth.multistage) {
credential_clear_secrets(&http_auth);
return HTTP_REAUTH;
}
credential_reject(&http_auth);
return HTTP_NOAUTH;
} else {
http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
if (results->auth_avail) {
http_auth_methods &= results->auth_avail;
http_auth_methods_restricted = 1;
}
return HTTP_REAUTH;
}
} else {
if (results->http_connectcode == 407)
credential_reject(&proxy_auth);
if (!curl_errorstr[0])
strlcpy(curl_errorstr,
curl_easy_strerror(results->curl_result),
sizeof(curl_errorstr));
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;
const struct string_list_item *item;
for_each_string_list_item(item, &extra_http_headers)
headers = curl_slist_append(headers, item->string);
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
* https://datatracker.ietf.org/doc/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++] = xstrdup("*");
/* 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;
}
}
for (i = 0; i < num_langs; 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 -> ""
*/
const char *http_get_accept_language_header(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) {
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
} else {
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, 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);
}
curl_easy_setopt(slot->curl, CURLOPT_HEADERFUNCTION, fwrite_wwwauth);
accept_language = http_get_accept_language_header();
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;
if (options && options->extra_headers) {
for_each_string_list_item(item, options->extra_headers) {
headers = curl_slist_append(headers, item->string);
}
}
}
headers = http_append_auth_header(&http_auth, headers);
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 i = 3;
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;
}
}
while (ret == HTTP_REAUTH && --i) {
/*
* 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, 1);
ret = http_request(url, result, target, options);
}
return ret;
}
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.
*/
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 == the_hash_algo->hexsz)
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 *hash, const char *base_url)
{
char *url, *tmp;
struct strbuf buf = STRBUF_INIT;
if (http_is_verbose)
fprintf(stderr, "Getting index for pack %s\n", hash_to_hex(hash));
end_url_with_slash(&buf, base_url);
strbuf_addf(&buf, "objects/pack/pack-%s.idx", hash_to_hex(hash));
url = strbuf_detach(&buf, NULL);
strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(hash));
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;
char *url;
const char *data;
struct strbuf buf = STRBUF_INIT;
struct object_id oid;
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 (*data) {
if (skip_prefix(data, "P pack-", &data) &&
!parse_oid_hex(data, &oid, &data) &&
skip_prefix(data, ".pack", &data) &&
(*data == '\n' || *data == '\0')) {
fetch_and_setup_pack_index(packs_head, oid.hash, base_url);
} else {
data = strchrnul(data, '\n');
}
if (*data)
data++; /* skip past newline */
}
cleanup:
free(url);
return ret;
}
void release_http_pack_request(struct http_pack_request *preq)
{
if (preq->packfile) {
fclose(preq->packfile);
preq->packfile = NULL;
}
preq->slot = NULL;
strbuf_release(&preq->tmpfile);
curl_slist_free_all(preq->headers);
free(preq->url);
free(preq);
}
static const char *default_index_pack_args[] =
{"index-pack", "--stdin", NULL};
int finish_http_pack_request(struct http_pack_request *preq)
{
struct child_process ip = CHILD_PROCESS_INIT;
int tmpfile_fd;
int ret = 0;
fclose(preq->packfile);
preq->packfile = NULL;
tmpfile_fd = xopen(preq->tmpfile.buf, O_RDONLY);
ip.git_cmd = 1;
ip.in = tmpfile_fd;
strvec_pushv(&ip.args, preq->index_pack_args ?
preq->index_pack_args :
default_index_pack_args);
if (preq->preserve_index_pack_stdout)
ip.out = 0;
else
ip.no_stdout = 1;
if (run_command(&ip)) {
ret = -1;
goto cleanup;
}
cleanup:
close(tmpfile_fd);
unlink(preq->tmpfile.buf);
return ret;
}
void http_install_packfile(struct packed_git *p,
struct packed_git **list_to_remove_from)
{
struct packed_git **lst = list_to_remove_from;
while (*lst != p)
lst = &((*lst)->next);
*lst = (*lst)->next;
install_packed_git(the_repository, p);
}
struct http_pack_request *new_http_pack_request(
const unsigned char *packed_git_hash, const char *base_url) {
struct strbuf buf = STRBUF_INIT;
end_url_with_slash(&buf, base_url);
strbuf_addf(&buf, "objects/pack/pack-%s.pack",
hash_to_hex(packed_git_hash));
return new_direct_http_pack_request(packed_git_hash,
strbuf_detach(&buf, NULL));
}
struct http_pack_request *new_direct_http_pack_request(
const unsigned char *packed_git_hash, char *url)
{
off_t prev_posn = 0;
struct http_pack_request *preq;
CALLOC_ARRAY(preq, 1);
strbuf_init(&preq->tmpfile, 0);
preq->url = url;
strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(packed_git_hash));
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();
preq->headers = object_request_headers();
curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEDATA, 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, preq->headers);
/*
* 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",
hash_to_hex(packed_git_hash),
(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 nmemb;
}
do {
ssize_t retval = xwrite(freq->localfile,
(char *) ptr + posn, size - posn);
if (retval < 0)
return posn / eltsize;
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);
the_hash_algo->update_fn(&freq->c, expn,
sizeof(expn) - freq->stream.avail_out);
} while (freq->stream.avail_in && freq->zret == Z_OK);
return nmemb;
}
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;
CALLOC_ARRAY(freq, 1);
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);
the_hash_algo->init_fn(&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);
the_hash_algo->init_fn(&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();
freq->headers = object_request_headers();
curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEDATA, 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, freq->headers);
/*
* 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)
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);
the_hash_algo->final_oid_fn(&freq->real_oid, &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) {
freq->slot->callback_func = NULL;
freq->slot->callback_data = NULL;
release_active_slot(freq->slot);
freq->slot = NULL;
}
curl_slist_free_all(freq->headers);
strbuf_release(&freq->tmpfile);
}
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