[PATCH v3 3/4] http: handle proxy proactive authentication

[Nelson Benitez Leon <nelsonjesus.benitez@seap.minhap.es>]

If http_proactive_auth flag is set and there is a username
but no password in the proxy url, then interactively ask for
the password.

This makes possible to not have the password written down in
http_proxy env var or in http.proxy config option.

Signed-off-by: Nelson Benitez Leon <nbenitezl@gmail.com>
---
 http.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/http.c b/http.c
index 8932da5..b0b4362 100644
--- a/http.c
+++ b/http.c
@@ -43,6 +43,7 @@ static int curl_ftp_no_epsv;
 static const char *curl_http_proxy;
 static const char *curl_cookie_file;
 static struct credential http_auth = CREDENTIAL_INIT;
+static struct credential proxy_auth = CREDENTIAL_INIT;
 static int http_proactive_auth;
 static const char *user_agent;
 
@@ -303,6 +304,17 @@ static CURL *get_curl_handle(void)
 		}
 	}
 	if (curl_http_proxy) {
+		credential_from_url(&proxy_auth, curl_http_proxy);
+		if (http_proactive_auth && proxy_auth.username && !proxy_auth.password) {
+			/* proxy string has username but no password, ask for password */
+			struct strbuf pbuf = STRBUF_INIT;
+			credential_fill(&proxy_auth);
+			strbuf_addf(&pbuf, "%s://%s:%s@%s",proxy_auth.protocol,
+			    	proxy_auth.username, proxy_auth.password,
+			    	proxy_auth.host);
+			free ((void *)curl_http_proxy);
+			curl_http_proxy =  strbuf_detach(&pbuf, NULL);
+		}
 		curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 		curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 	}
-- 
1.7.7.6