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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:34:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:34:27 +0000
commit4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f (patch)
tree47c1d492e9c956c1cd2b74dbd3b9d8b0db44dc4e /http.c
parentInitial commit. (diff)
downloadgit-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.tar.xz
git-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.zip
Adding upstream version 1:2.43.0.upstream/1%2.43.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'http.c')
-rw-r--r--http.c2724
1 files changed, 2724 insertions, 0 deletions
diff --git a/http.c b/http.c
new file mode 100644
index 0000000..8f71bf0
--- /dev/null
+++ b/http.c
@@ -0,0 +1,2724 @@
+#include "git-compat-util.h"
+#include "git-curl-compat.h"
+#include "hex.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 "trace.h"
+#include "transport.h"
+#include "packfile.h"
+#include "protocol.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 const char *curl_http_version = NULL;
+static const char *ssl_cert;
+static const char *ssl_cert_type;
+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 },
+#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 const char *ssl_key;
+static const char *ssl_key_type;
+static const char *ssl_capath;
+static const char *curl_no_proxy;
+#ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
+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 const char *http_proxy_ssl_cert;
+static const char *http_proxy_ssl_key;
+static const 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 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;
+
+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 curl_slist *no_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 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;
+}
+
+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);
+
+ 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(const char **var, char *value)
+{
+ if (value) {
+ free((void *)*var);
+ *var = xstrdup(value);
+ }
+}
+
+static void set_proxyauth_name_password(CURL *result)
+{
+ curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
+ proxy_auth.username);
+ curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
+ proxy_auth.password);
+}
+
+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 (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);
+ }
+ 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);
+ }
+ 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(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 = 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");
+ no_pragma_header = curl_slist_append(http_copy_default_headers(),
+ "Pragma:");
+
+ {
+ 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(no_pragma_header);
+ no_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_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 || 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) {
+ 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
+ * 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 -> ""
+ */
+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;
+ 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.
+ */
+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);
+ 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();
+ 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,
+ 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",
+ 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();
+
+ 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, 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)
+ 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;
+ }
+ strbuf_release(&freq->tmpfile);
+}