| #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 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 |
| * 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++] = "*"; /* 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); |
| } |