diff options
Diffstat (limited to 'http.c')
| -rw-r--r-- | http.c | 811 |
1 files changed, 607 insertions, 204 deletions
@@ -1,10 +1,15 @@ +#include "git-compat-util.h" #include "http.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" -int data_received; int active_requests; int http_is_verbose; size_t http_post_buffer = 16 * LARGE_PACKET_MAX; @@ -29,6 +34,7 @@ static CURL *curl_default; char curl_errorstr[CURL_ERROR_SIZE]; static int curl_ssl_verify = -1; +static int curl_ssl_try; static const char *ssl_cert; #if LIBCURL_VERSION_NUM >= 0x070903 static const char *ssl_key; @@ -42,7 +48,9 @@ static long curl_low_speed_time = -1; static int curl_ftp_no_epsv; static const char *curl_http_proxy; static const char *curl_cookie_file; -static char *user_name, *user_pass; +static int curl_save_cookies; +struct credential http_auth = CREDENTIAL_INIT; +static int http_proactive_auth; static const char *user_agent; #if LIBCURL_VERSION_NUM >= 0x071700 @@ -53,14 +61,19 @@ static const char *user_agent; #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD #endif -static char *ssl_cert_password; +static struct credential cert_auth = CREDENTIAL_INIT; static int ssl_cert_password_required; +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY +static unsigned long http_auth_methods = CURLAUTH_ANY; +#endif static struct curl_slist *pragma_header; static struct curl_slist *no_pragma_header; static struct active_request_slot *active_queue_head; +static char *cached_accept_language; + size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) { size_t size = eltsize * nmemb; @@ -99,16 +112,45 @@ size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) struct strbuf *buffer = buffer_; strbuf_add(buffer, ptr, size); - data_received++; return size; } size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf) { - data_received++; return eltsize * nmemb; } +static void closedown_active_slot(struct active_request_slot *slot) +{ + active_requests--; + slot->in_use = 0; +} + +static void finish_active_slot(struct active_request_slot *slot) +{ + closedown_active_slot(slot); + curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); + + if (slot->finished != NULL) + (*slot->finished) = 1; + + /* Store slot results so they can be read after the slot is reused */ + if (slot->results != NULL) { + slot->results->curl_result = slot->curl_result; + slot->results->http_code = slot->http_code; +#if LIBCURL_VERSION_NUM >= 0x070a08 + curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL, + &slot->results->auth_avail); +#else + slot->results->auth_avail = 0; +#endif + } + + /* Run callback if appropriate */ + if (slot->callback_func != NULL) + slot->callback_func(slot->callback_data); +} + #ifdef USE_CURL_MULTI static void process_curl_messages(void) { @@ -158,8 +200,11 @@ static int http_options(const char *var, const char *value, void *cb) if (!strcmp("http.sslcainfo", var)) return git_config_string(&ssl_cainfo, var, value); if (!strcmp("http.sslcertpasswordprotected", var)) { - if (git_config_bool(var, value)) - ssl_cert_password_required = 1; + 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.minsessions", var)) { @@ -194,6 +239,10 @@ static int http_options(const char *var, const char *value, void *cb) if (!strcmp("http.cookiefile", var)) return git_config_string(&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_int(var, value); @@ -211,36 +260,87 @@ static int http_options(const char *var, const char *value, void *cb) static void init_curl_http_auth(CURL *result) { - if (user_name) { - struct strbuf up = STRBUF_INIT; - if (!user_pass) - user_pass = xstrdup(git_getpass("Password: ")); - strbuf_addf(&up, "%s:%s", user_name, user_pass); - curl_easy_setopt(result, CURLOPT_USERPWD, - strbuf_detach(&up, NULL)); + if (!http_auth.username) + return; + + credential_fill(&http_auth); + +#if LIBCURL_VERSION_NUM >= 0x071301 + curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username); + curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password); +#else + { + static struct strbuf up = STRBUF_INIT; + /* + * Note that we assume we only ever have a single set of + * credentials in a given program run, so we do not have + * to worry about updating this buffer, only setting its + * initial value. + */ + if (!up.len) + strbuf_addf(&up, "%s:%s", + http_auth.username, http_auth.password); + curl_easy_setopt(result, CURLOPT_USERPWD, up.buf); } +#endif } static int has_cert_password(void) { - if (ssl_cert_password != NULL) - return 1; if (ssl_cert == NULL || ssl_cert_password_required != 1) return 0; - /* Only prompt the user once. */ - ssl_cert_password_required = -1; - ssl_cert_password = git_getpass("Certificate Password: "); - if (ssl_cert_password != NULL) { - ssl_cert_password = xstrdup(ssl_cert_password); - return 1; - } else + if (!cert_auth.password) { + cert_auth.protocol = xstrdup("cert"); + cert_auth.username = xstrdup(""); + cert_auth.path = xstrdup(ssl_cert); + credential_fill(&cert_auth); + } + return 1; +} + +#if LIBCURL_VERSION_NUM >= 0x071900 +static void set_curl_keepalive(CURL *c) +{ + curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1); +} + +#elif LIBCURL_VERSION_NUM >= 0x071000 +static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type) +{ + int ka = 1; + int rc; + socklen_t len = (socklen_t)sizeof(ka); + + if (type != CURLSOCKTYPE_IPCXN) return 0; + + rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len); + if (rc < 0) + warning("unable to set SO_KEEPALIVE on socket %s", + strerror(errno)); + + return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */ +} + +static void set_curl_keepalive(CURL *c) +{ + curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback); +} + +#else +static void set_curl_keepalive(CURL *c) +{ + /* not supported on older curl versions */ } +#endif static 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); @@ -258,12 +358,13 @@ static CURL *get_curl_handle(void) curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY); #endif - init_curl_http_auth(result); + if (http_proactive_auth) + init_curl_http_auth(result); if (ssl_cert != NULL) curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); if (has_cert_password()) - curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password); + curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password); #if LIBCURL_VERSION_NUM >= 0x070903 if (ssl_key != NULL) curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); @@ -274,7 +375,6 @@ static CURL *get_curl_handle(void) #endif if (ssl_cainfo != NULL) curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); - curl_easy_setopt(result, CURLOPT_FAILONERROR, 1); if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, @@ -294,64 +394,26 @@ static CURL *get_curl_handle(void) curl_easy_setopt(result, CURLOPT_VERBOSE, 1); curl_easy_setopt(result, CURLOPT_USERAGENT, - user_agent ? user_agent : GIT_HTTP_USER_AGENT); + user_agent ? user_agent : git_user_agent()); if (curl_ftp_no_epsv) curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); - if (curl_http_proxy) - curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); - - return result; -} +#ifdef CURLOPT_USE_SSL + if (curl_ssl_try) + curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY); +#endif -static void http_auth_init(const char *url) -{ - char *at, *colon, *cp, *slash, *decoded; - int len; + if (curl_http_proxy) { + curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); +#if LIBCURL_VERSION_NUM >= 0x070a07 + curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); +#endif + } - cp = strstr(url, "://"); - if (!cp) - return; + set_curl_keepalive(result); - /* - * Ok, the URL looks like "proto://something". Which one? - * "proto://<user>:<pass>@<host>/...", - * "proto://<user>@<host>/...", or just - * "proto://<host>/..."? - */ - cp += 3; - at = strchr(cp, '@'); - colon = strchr(cp, ':'); - slash = strchrnul(cp, '/'); - if (!at || slash <= at) - return; /* No credentials */ - if (!colon || at <= colon) { - /* Only username */ - len = at - cp; - user_name = xmalloc(len + 1); - memcpy(user_name, cp, len); - user_name[len] = '\0'; - decoded = url_decode(user_name); - free(user_name); - user_name = decoded; - user_pass = NULL; - } else { - len = colon - cp; - user_name = xmalloc(len + 1); - memcpy(user_name, cp, len); - user_name[len] = '\0'; - decoded = url_decode(user_name); - free(user_name); - user_name = decoded; - len = at - (colon + 1); - user_pass = xmalloc(len + 1); - memcpy(user_pass, colon + 1, len); - user_pass[len] = '\0'; - decoded = url_decode(user_pass); - free(user_pass); - user_pass = decoded; - } + return result; } static void set_from_env(const char **var, const char *envname) @@ -361,16 +423,29 @@ static void set_from_env(const char **var, const char *envname) *var = val; } -void http_init(struct remote *remote) +void http_init(struct remote *remote, const char *url, int proactive_auth) { char *low_speed_limit; char *low_speed_time; + char *normalized_url; + struct urlmatch_config config = { STRING_LIST_INIT_DUP }; + + config.section = "http"; + config.key = NULL; + config.collect_fn = http_options; + config.cascade_fn = git_default_config; + config.cb = NULL; http_is_verbose = 0; + normalized_url = url_normalize(url, &config.url); - git_config(http_options, NULL); + git_config(urlmatch_config_entry, &config); + free(normalized_url); - curl_global_init(CURL_GLOBAL_ALL); + 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); @@ -386,10 +461,8 @@ void http_init(struct remote *remote) } curlm = curl_multi_init(); - if (curlm == NULL) { - fprintf(stderr, "Error creating curl multi handle.\n"); - exit(1); - } + if (!curlm) + die("curl_multi_init failed"); #endif if (getenv("GIT_SSL_NO_VERIFY")) @@ -425,11 +498,11 @@ void http_init(struct remote *remote) if (getenv("GIT_CURL_FTP_NO_EPSV")) curl_ftp_no_epsv = 1; - if (remote && remote->url && remote->url[0]) { - http_auth_init(remote->url[0]); + if (url) { + credential_from_url(&http_auth, url); if (!ssl_cert_password_required && getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") && - !prefixcmp(remote->url[0], "https://")) + starts_with(url, "https://")) ssl_cert_password_required = 1; } @@ -475,12 +548,15 @@ void http_cleanup(void) curl_http_proxy = NULL; } - if (ssl_cert_password != NULL) { - memset(ssl_cert_password, 0, strlen(ssl_cert_password)); - free(ssl_cert_password); - ssl_cert_password = NULL; + if (cert_auth.password != NULL) { + memset(cert_auth.password, 0, strlen(cert_auth.password)); + free(cert_auth.password); + cert_auth.password = NULL; } ssl_cert_password_required = 0; + + free(cached_accept_language); + cached_accept_language = NULL; } struct active_request_slot *get_active_slot(void) @@ -530,12 +606,13 @@ struct active_request_slot *get_active_slot(void) active_requests++; slot->in_use = 1; - slot->local = NULL; slot->results = NULL; slot->finished = NULL; slot->callback_data = NULL; slot->callback_func = NULL; curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file); + if (curl_save_cookies) + curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); @@ -544,6 +621,12 @@ struct active_request_slot *get_active_slot(void) 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); +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods); +#endif + if (http_auth.password) + init_curl_http_auth(slot->curl); return slot; } @@ -634,8 +717,6 @@ void step_active_slots(void) void run_active_slot(struct active_request_slot *slot) { #ifdef USE_CURL_MULTI - long last_pos = 0; - long current_pos; fd_set readfds; fd_set writefds; fd_set excfds; @@ -645,25 +726,45 @@ void run_active_slot(struct active_request_slot *slot) slot->finished = &finished; while (!finished) { - data_received = 0; step_active_slots(); - if (!data_received && slot->local != NULL) { - current_pos = ftell(slot->local); - if (current_pos > last_pos) - data_received++; - last_pos = current_pos; - } + if (slot->in_use) { +#if LIBCURL_VERSION_NUM >= 0x070f04 + long curl_timeout; + curl_multi_timeout(curlm, &curl_timeout); + if (curl_timeout == 0) { + continue; + } else if (curl_timeout == -1) { + select_timeout.tv_sec = 0; + select_timeout.tv_usec = 50000; + } else { + select_timeout.tv_sec = curl_timeout / 1000; + select_timeout.tv_usec = (curl_timeout % 1000) * 1000; + } +#else + select_timeout.tv_sec = 0; + select_timeout.tv_usec = 50000; +#endif - if (slot->in_use && !data_received) { - max_fd = 0; + max_fd = -1; FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&excfds); - select_timeout.tv_sec = 0; - select_timeout.tv_usec = 50000; - select(max_fd, &readfds, &writefds, - &excfds, &select_timeout); + curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd); + + /* + * It can happen that curl_multi_timeout returns a pathologically + * long timeout when curl_multi_fdset returns no file descriptors + * to read. See commit message for more details. + */ + if (max_fd < 0 && + (select_timeout.tv_sec > 0 || + select_timeout.tv_usec > 50000)) { + select_timeout.tv_sec = 0; + select_timeout.tv_usec = 50000; + } + + select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout); } } #else @@ -674,12 +775,6 @@ void run_active_slot(struct active_request_slot *slot) #endif } -static void closedown_active_slot(struct active_request_slot *slot) -{ - active_requests--; - slot->in_use = 0; -} - static void release_active_slot(struct active_request_slot *slot) { closedown_active_slot(slot); @@ -696,25 +791,6 @@ static void release_active_slot(struct active_request_slot *slot) #endif } -void finish_active_slot(struct active_request_slot *slot) -{ - closedown_active_slot(slot); - curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); - - if (slot->finished != NULL) - (*slot->finished) = 1; - - /* Store slot results so they can be read after the slot is reused */ - if (slot->results != NULL) { - slot->results->curl_result = slot->curl_result; - slot->results->http_code = slot->http_code; - } - - /* Run callback if appropriate */ - if (slot->callback_func != NULL) - slot->callback_func(slot->callback_data); -} - void finish_all_active_slots(void) { struct active_request_slot *slot = active_queue_head; @@ -741,14 +817,6 @@ static inline int needs_quote(int ch) return 1; } -static inline int hex(int v) -{ - if (v < 10) - return '0' + v; - else - return 'A' + v - 10; -} - static char *quote_ref_url(const char *base, const char *ref) { struct strbuf buf = STRBUF_INIT; @@ -785,20 +853,283 @@ char *get_remote_object_url(const char *url, const char *hex, return strbuf_detach(&buf, NULL); } +static int handle_curl_result(struct slot_results *results) +{ + /* + * 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. + */ + if (results->curl_result == CURLE_OK && + results->http_code >= 400) { + results->curl_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. + */ + snprintf(curl_errorstr, sizeof(curl_errorstr), + "The requested URL returned error: %ld", + results->http_code); + } + + if (results->curl_result == CURLE_OK) { + credential_approve(&http_auth); + return HTTP_OK; + } else if (missing_target(results)) + return HTTP_MISSING_TARGET; + else if (results->http_code == 401) { + if (http_auth.username && http_auth.password) { + credential_reject(&http_auth); + return HTTP_NOAUTH; + } else { +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY + http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE; +#endif + return HTTP_REAUTH; + } + } else { +#if LIBCURL_VERSION_NUM >= 0x070c00 + if (!curl_errorstr[0]) + strlcpy(curl_errorstr, + curl_easy_strerror(results->curl_result), + sizeof(curl_errorstr)); +#endif + return HTTP_ERROR; + } +} + +int run_one_slot(struct active_request_slot *slot, + struct slot_results *results) +{ + slot->results = results; + if (!start_active_slot(slot)) { + snprintf(curl_errorstr, sizeof(curl_errorstr), + "failed to start HTTP request"); + return HTTP_START_FAILED; + } + + run_active_slot(slot); + return handle_curl_result(results); +} + +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) + ; + + sprintf(q_format, ";q=0.%%0%dd", decimal_places); + + strbuf_addstr(buf, "Accept-Language: "); + + for (i = 0; i < num_langs; i++) { + if (i > 0) + strbuf_addstr(buf, ", "); + + strbuf_addstr(buf, language_tags[i]); + + if (i > 0) + strbuf_addf(buf, q_format, max_q - i); + + if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) { + strbuf_remove(buf, last_buf_len, buf->len - last_buf_len); + break; + } + + last_buf_len = buf->len; + } + } + + /* free language tags -- last one is a static '*' */ + for (i = 0; i < num_langs - 1; i++) + free(language_tags[i]); + free(language_tags); +} + +/* + * Get an Accept-Language header which indicates user's preferred languages. + * + * Examples: + * LANGUAGE= -> "" + * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1" + * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1" + * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1" + * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1" + * LANGUAGE= LANG=C -> "" + */ +static const char *get_accept_language(void) +{ + if (!cached_accept_language) { + struct strbuf buf = STRBUF_INIT; + write_accept_language(&buf); + if (buf.len > 0) + cached_accept_language = strbuf_detach(&buf, NULL); + } + + return cached_accept_language; +} + /* http_request() targets */ #define HTTP_REQUEST_STRBUF 0 #define HTTP_REQUEST_FILE 1 -static int http_request(const char *url, void *result, int target, int options) +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 = NULL; struct strbuf buf = STRBUF_INIT; + const char *accept_language; int ret; slot = get_active_slot(); - slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); if (result == NULL) { @@ -816,71 +1147,151 @@ static int http_request(const char *url, void *result, int target, int options) headers = curl_slist_append(headers, buf.buf); strbuf_reset(&buf); } - slot->local = result; } else curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); } + accept_language = get_accept_language(); + + if (accept_language) + headers = curl_slist_append(headers, accept_language); + strbuf_addstr(&buf, "Pragma:"); - if (options & HTTP_NO_CACHE) + if (options && options->no_cache) strbuf_addstr(&buf, " no-cache"); + if (options && options->keep_error) + curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); headers = curl_slist_append(headers, buf.buf); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); + curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip"); - if (start_active_slot(slot)) { - run_active_slot(slot); - if (results.curl_result == CURLE_OK) - ret = HTTP_OK; - else if (missing_target(&results)) - ret = HTTP_MISSING_TARGET; - else if (results.http_code == 401) { - if (user_name) { - ret = HTTP_NOAUTH; - } else { - /* - * git_getpass is needed here because its very likely stdin/stdout are - * pipes to our parent process. So we instead need to use /dev/tty, - * but that is non-portable. Using git_getpass() can at least be stubbed - * on other platforms with a different implementation if/when necessary. - */ - user_name = xstrdup(git_getpass("Username: ")); - init_curl_http_auth(slot->curl); - ret = HTTP_REAUTH; - } - } else - ret = HTTP_ERROR; - } else { - error("Unable to start HTTP request for %s", url); - ret = HTTP_START_FAILED; + 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); } - slot->local = NULL; + 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; } -int http_get_strbuf(const char *url, struct strbuf *result, int options) +/* + * 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 simply punt, as there is not much we can + * do (and such a scheme is unlikely to represent a real git repository, + * which means we are likely about to abort anyway). + */ +static int update_url_from_redirect(struct strbuf *base, + const char *asked, + const struct strbuf *got) { - int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options); - if (http_ret == HTTP_REAUTH) { - http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options); + const char *tail; + size_t tail_len; + + if (!strcmp(asked, got->buf)) + return 0; + + if (!skip_prefix(asked, base->buf, &tail)) + die("BUG: update_url_from_redirect: %s is not a superset of %s", + asked, base->buf); + + tail_len = strlen(tail); + + if (got->len < tail_len || + strcmp(tail, got->buf + got->len - tail_len)) + return 0; /* insane redirect scheme */ + + strbuf_reset(base); + strbuf_add(base, got->buf, got->len - tail_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 (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; + } } - return http_ret; + + if (ret != HTTP_REAUTH) + return ret; + + /* + * If we are using KEEP_ERROR, the previous request may have + * put cruft into our output stream; we should clear it out before + * making our next request. We only know how to do this for + * the strbuf case, but that is enough to satisfy current callers. + */ + if (options && options->keep_error) { + switch (target) { + case HTTP_REQUEST_STRBUF: + strbuf_reset(result); + break; + default: + die("BUG: HTTP_KEEP_ERROR is only supported with strbufs"); + } + } + + 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 an url and stores the result in the given file. + * Downloads a URL and stores the result in the given file. * * If a previous interrupted download is detected (i.e. a previous temporary * file is still around) the download is resumed. */ -static int http_get_file(const char *url, const char *filename, int options) +static int http_get_file(const char *url, const char *filename, + struct http_get_options *options) { int ret; struct strbuf tmpfile = STRBUF_INIT; @@ -888,43 +1299,37 @@ static int http_get_file(const char *url, const char *filename, int options) strbuf_addf(&tmpfile, "%s.temp", filename); result = fopen(tmpfile.buf, "a"); - if (! result) { + if (!result) { error("Unable to open local file %s", tmpfile.buf); ret = HTTP_ERROR; goto cleanup; } - ret = http_request(url, result, HTTP_REQUEST_FILE, options); + ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options); fclose(result); - if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename)) + if (ret == HTTP_OK && move_temp_to_file(tmpfile.buf, filename)) ret = HTTP_ERROR; cleanup: strbuf_release(&tmpfile); return ret; } -int http_error(const char *url, int ret) -{ - /* http_request has already handled HTTP_START_FAILED. */ - if (ret != HTTP_START_FAILED) - error("%s while accessing %s\n", curl_errorstr, url); - - 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, HTTP_NO_CACHE) == HTTP_OK) { + if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) { strbuf_rtrim(&buffer); if (buffer.len == 40) ret = get_sha1_hex(buffer.buf, ref->old_sha1); - else if (!prefixcmp(buffer.buf, "ref: ")) { + else if (starts_with(buffer.buf, "ref: ")) { ref->symref = xstrdup(buffer.buf + 5); ret = 0; } @@ -951,8 +1356,8 @@ static char *fetch_pack_index(unsigned char *sha1, const char *base_url) strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1)); tmp = strbuf_detach(&buf, NULL); - if (http_get_file(url, tmp, 0) != HTTP_OK) { - error("Unable to get pack index %s\n", url); + if (http_get_file(url, tmp, NULL) != HTTP_OK) { + error("Unable to get pack index %s", url); free(tmp); tmp = NULL; } @@ -969,7 +1374,7 @@ static int fetch_and_setup_pack_index(struct packed_git **packs_head, int ret; if (has_pack_index(sha1)) { - new_pack = parse_pack_index(sha1, NULL); + 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; @@ -1004,6 +1409,7 @@ add_pack: int http_get_info_packs(const char *base_url, struct packed_git **packs_head) { + struct http_get_options options = {0}; int ret = 0, i = 0; char *url, *data; struct strbuf buf = STRBUF_INIT; @@ -1013,7 +1419,8 @@ int http_get_info_packs(const char *base_url, struct packed_git **packs_head) strbuf_addstr(&buf, "objects/info/packs"); url = strbuf_detach(&buf, NULL); - ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE); + options.no_cache = 1; + ret = http_get_strbuf(url, &buf, &options); if (ret != HTTP_OK) goto cleanup; @@ -1023,8 +1430,8 @@ int http_get_info_packs(const char *base_url, struct packed_git **packs_head) case 'P': i++; if (i + 52 <= buf.len && - !prefixcmp(data + i, " pack-") && - !prefixcmp(data + i + 46, ".pack\n")) { + starts_with(data + i, " pack-") && + starts_with(data + i + 46, ".pack\n")) { get_sha1_hex(data + i + 6, sha1); fetch_and_setup_pack_index(packs_head, sha1, base_url); @@ -1048,7 +1455,6 @@ void release_http_pack_request(struct http_pack_request *preq) if (preq->packfile != NULL) { fclose(preq->packfile); preq->packfile = NULL; - preq->slot->local = NULL; } if (preq->range_header != NULL) { curl_slist_free_all(preq->range_header); @@ -1056,6 +1462,7 @@ void release_http_pack_request(struct http_pack_request *preq) } preq->slot = NULL; free(preq->url); + free(preq); } int finish_http_pack_request(struct http_pack_request *preq) @@ -1063,14 +1470,13 @@ int finish_http_pack_request(struct http_pack_request *preq) struct packed_git **lst; struct packed_git *p = preq->target; char *tmp_idx; - struct child_process ip; + struct child_process ip = CHILD_PROCESS_INIT; const char *ip_argv[8]; close_pack_index(p); fclose(preq->packfile); preq->packfile = NULL; - preq->slot->local = NULL; lst = preq->lst; while (*lst != p) @@ -1087,7 +1493,6 @@ int finish_http_pack_request(struct http_pack_request *preq) ip_argv[3] = preq->tmpfile; ip_argv[4] = NULL; - memset(&ip, 0, sizeof(ip)); ip.argv = ip_argv; ip.git_cmd = 1; ip.no_stdin = 1; @@ -1139,7 +1544,6 @@ struct http_pack_request *new_http_pack_request( } preq->slot = get_active_slot(); - preq->slot->local = preq->packfile; curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile); curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite); curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url); @@ -1196,7 +1600,6 @@ static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb, git_SHA1_Update(&freq->c, expn, sizeof(expn) - freq->stream.avail_out); } while (freq->stream.avail_in && freq->zret == Z_OK); - data_received++; return size; } @@ -1204,7 +1607,7 @@ struct http_object_request *new_http_object_request(const char *base_url, unsigned char *sha1) { char *hex = sha1_to_hex(sha1); - char *filename; + const char *filename; char prevfile[PATH_MAX]; int prevlocal; char prev_buf[PREV_BUF_SIZE]; |