Merge branch 'ls/p4-path-encoding'
[gitweb.git] / http.c
diff --git a/http.c b/http.c
index 00e3fc80e8161080549db26afd68e341989af453..0f924a8b48f3e30fd4a646ef48acb8d066988a53 100644 (file)
--- a/http.c
+++ b/http.c
@@ -8,6 +8,7 @@
 #include "credential.h"
 #include "version.h"
 #include "pkt-line.h"
+#include "gettext.h"
 #include "transport.h"
 
 int active_requests;
@@ -36,6 +37,21 @@ char curl_errorstr[CURL_ERROR_SIZE];
 static int curl_ssl_verify = -1;
 static int curl_ssl_try;
 static const char *ssl_cert;
+static const char *ssl_cipherlist;
+static const char *ssl_version;
+static struct {
+       const char *name;
+       long ssl_version;
+} sslversions[] = {
+       { "sslv2", CURL_SSLVERSION_SSLv2 },
+       { "sslv3", CURL_SSLVERSION_SSLv3 },
+       { "tlsv1", CURL_SSLVERSION_TLSv1 },
+#if LIBCURL_VERSION_NUM >= 0x072200
+       { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
+       { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
+       { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
+#endif
+};
 #if LIBCURL_VERSION_NUM >= 0x070903
 static const char *ssl_key;
 #endif
@@ -72,6 +88,8 @@ 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;
@@ -118,6 +136,37 @@ size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
        return eltsize * nmemb;
 }
 
+static void closedown_active_slot(struct active_request_slot *slot)
+{
+       active_requests--;
+       slot->in_use = 0;
+}
+
+static void finish_active_slot(struct active_request_slot *slot)
+{
+       closedown_active_slot(slot);
+       curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
+
+       if (slot->finished != NULL)
+               (*slot->finished) = 1;
+
+       /* Store slot results so they can be read after the slot is reused */
+       if (slot->results != NULL) {
+               slot->results->curl_result = slot->curl_result;
+               slot->results->http_code = slot->http_code;
+#if LIBCURL_VERSION_NUM >= 0x070a08
+               curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
+                                 &slot->results->auth_avail);
+#else
+               slot->results->auth_avail = 0;
+#endif
+       }
+
+       /* 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)
 {
@@ -154,6 +203,10 @@ static int http_options(const char *var, const char *value, void *cb)
                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_string(&ssl_cert, var, value);
 #if LIBCURL_VERSION_NUM >= 0x070903
@@ -329,6 +382,28 @@ static CURL *get_curl_handle(void)
        if (http_proactive_auth)
                init_curl_http_auth(result);
 
+       if (getenv("GIT_SSL_VERSION"))
+               ssl_version = getenv("GIT_SSL_VERSION");
+       if (ssl_version && *ssl_version) {
+               int i;
+               for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
+                       if (!strcmp(ssl_version, sslversions[i].name)) {
+                               curl_easy_setopt(result, CURLOPT_SSLVERSION,
+                                                sslversions[i].ssl_version);
+                               break;
+                       }
+               }
+               if (i == ARRAY_SIZE(sslversions))
+                       warning("unsupported ssl version %s: using default",
+                               ssl_version);
+       }
+
+       if (getenv("GIT_SSL_CIPHER_LIST"))
+               ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
+       if (ssl_cipherlist != NULL && *ssl_cipherlist)
+               curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
+                               ssl_cipherlist);
+
        if (ssl_cert != NULL)
                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
        if (has_cert_password())
@@ -390,8 +465,10 @@ static CURL *get_curl_handle(void)
 
        if (curl_http_proxy) {
                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
-               curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
        }
+#if LIBCURL_VERSION_NUM >= 0x070a07
+       curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+#endif
 
        set_curl_keepalive(result);
 
@@ -536,6 +613,9 @@ void http_cleanup(void)
                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)
@@ -754,12 +834,6 @@ 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);
@@ -776,31 +850,6 @@ 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;
-#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);
-}
-
 void finish_all_active_slots(void)
 {
        struct active_request_slot *slot = active_queue_head;
@@ -863,7 +912,7 @@ char *get_remote_object_url(const char *url, const char *hex,
        return strbuf_detach(&buf, NULL);
 }
 
-int handle_curl_result(struct slot_results *results)
+static int handle_curl_result(struct slot_results *results)
 {
        /*
         * If we see a failing http code with CURLE_OK, we have turned off
@@ -1013,6 +1062,116 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type,
                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
@@ -1026,6 +1185,7 @@ static int http_request(const char *url,
        struct slot_results results;
        struct curl_slist *headers = NULL;
        struct strbuf buf = STRBUF_INIT;
+       const char *accept_language;
        int ret;
 
        slot = get_active_slot();
@@ -1051,6 +1211,11 @@ static int http_request(const char *url,
                                         fwrite_buffer);
        }
 
+       accept_language = get_accept_language();
+
+       if (accept_language)
+               headers = curl_slist_append(headers, accept_language);
+
        strbuf_addstr(&buf, "Pragma:");
        if (options && options->no_cache)
                strbuf_addstr(&buf, " no-cache");
@@ -1202,7 +1367,7 @@ static int http_get_file(const char *url, const char *filename,
        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 && finalize_object_file(tmpfile.buf, filename))
                ret = HTTP_ERROR;
 cleanup:
        strbuf_release(&tmpfile);
@@ -1289,7 +1454,7 @@ static int fetch_and_setup_pack_index(struct packed_git **packs_head,
        ret = verify_pack_index(new_pack);
        if (!ret) {
                close_pack_index(new_pack);
-               ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
+               ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
        }
        free(tmp_idx);
        if (ret)
@@ -1356,6 +1521,7 @@ 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)
@@ -1400,8 +1566,8 @@ int finish_http_pack_request(struct http_pack_request *preq)
 
        unlink(sha1_pack_index_name(p->sha1));
 
-       if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
-        || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
+       if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
+        || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
                free(tmp_idx);
                return -1;
        }
@@ -1665,7 +1831,7 @@ int finish_http_object_request(struct http_object_request *freq)
                return -1;
        }
        freq->rename =
-               move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
+               finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
 
        return freq->rename;
 }