From: Dave Borowitz <dborow...@google.com>

HTTP servers may send Set-Cookie headers in a response and expect them
to be set on subsequent requests. By default, libcurl behavior is to
store such cookies in memory and reuse them across requests within a
single session. However, it may also make sense, depending on the
server and the cookies, to store them across sessions. Provide users
an option to enable this behavior, writing cookies out to the same
file specified in http.cookiefile.
---
 Documentation/config.txt |  6 +++++-
 http.c                   |  7 +++++++
 t/lib-httpd/apache.conf  |  8 ++++++++
 t/t5551-http-fetch.sh    | 18 ++++++++++++++++++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index e0b923f..e935447 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1456,7 +1456,11 @@ http.cookiefile::
        of the file to read cookies from should be plain HTTP headers or
        the Netscape/Mozilla cookie file format (see linkgit:curl[1]).
        NOTE that the file specified with http.cookiefile is only used as
-       input. No cookies will be stored in the file.
+       input unless http.saveCookies is set.
+
+http.savecookies::
+       If set, store cookies received during requests to the file specified by
+       http.cookiefile. Has no effect if http.cookiefile is unset.
 
 http.sslVerify::
        Whether to verify the SSL certificate when fetching or pushing
diff --git a/http.c b/http.c
index 2d086ae..2fbf986 100644
--- a/http.c
+++ b/http.c
@@ -45,6 +45,7 @@ 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 int curl_save_cookies;
 static struct credential http_auth = CREDENTIAL_INIT;
 static int http_proactive_auth;
 static const char *user_agent;
@@ -200,6 +201,10 @@ 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);
@@ -513,6 +518,8 @@ struct active_request_slot *get_active_slot(void)
        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);
diff --git a/t/lib-httpd/apache.conf b/t/lib-httpd/apache.conf
index dd17e3a..397c480 100644
--- a/t/lib-httpd/apache.conf
+++ b/t/lib-httpd/apache.conf
@@ -22,6 +22,9 @@ ErrorLog error.log
 <IfModule !mod_version.c>
        LoadModule version_module modules/mod_version.so
 </IfModule>
+<IfModule !mod_headers.c>
+       LoadModule headers_module modules/mod_headers.so
+</IfModule>
 
 <IfVersion < 2.4>
 LockFile accept.lock
@@ -87,6 +90,11 @@ Alias /auth/dumb/ www/auth/dumb/
        SetEnv GIT_HTTP_EXPORT_ALL
        SetEnv GIT_NAMESPACE ns
 </LocationMatch>
+<LocationMatch /smart_cookies/>
+       SetEnv GIT_EXEC_PATH ${GIT_EXEC_PATH}
+       SetEnv GIT_HTTP_EXPORT_ALL
+       Header set Set-Cookie name=value
+</LocationMatch>
 ScriptAliasMatch /smart_*[^/]*/(.*) ${GIT_EXEC_PATH}/git-http-backend/$1
 ScriptAlias /broken_smart/ broken-smart-http.sh/
 <Directory ${GIT_EXEC_PATH}>
diff --git a/t/t5551-http-fetch.sh b/t/t5551-http-fetch.sh
index 55a866a..287d22b 100755
--- a/t/t5551-http-fetch.sh
+++ b/t/t5551-http-fetch.sh
@@ -187,6 +187,24 @@ test_expect_success 'dumb clone via http-backend respects 
namespace' '
        test_cmp expect actual
 '
 
+cat >cookies.txt <<EOF
+127.0.0.1      FALSE   /smart_cookies/ FALSE   0       othername       
othervalue
+EOF
+cat >expect_cookies.txt <<EOF
+# Netscape HTTP Cookie File
+# http://curl.haxx.se/docs/http-cookies.html
+# This file was generated by libcurl! Edit at your own risk.
+
+127.0.0.1      FALSE   /smart_cookies/ FALSE   0       othername       
othervalue
+127.0.0.1      FALSE   /smart_cookies/repo.git/info/   FALSE   0       name    
value
+EOF
+test_expect_success 'cookies stored in http.cookiefile when http.savecookies 
set' '
+       git config http.cookiefile cookies.txt &&
+       git config http.savecookies true &&
+       git ls-remote $HTTPD_URL/smart_cookies/repo.git master &&
+       test_cmp expect_cookies.txt cookies.txt
+'
+
 test -n "$GIT_TEST_LONG" && test_set_prereq EXPENSIVE
 
 test_expect_success EXPENSIVE 'create 50,000 tags in the repo' '
-- 
1.8.3.2

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