1 files changed, 50 insertions, 11 deletions

diff --git a/http.c b/http.c
index 8803c70825..92aba59082 100644
--- a/http.c
+++ b/http.c
@@ -31,6 +31,7 @@ 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;
@@ -163,6 +164,10 @@ static int http_options(const char *var, const char *value, void *cb)
 			ssl_cert_password_required = 1;
 		return 0;
 	}
+	if (!strcmp("http.ssltry", var)) {
+		curl_ssl_try = git_config_bool(var, value);
+		return 0;
+	}
 	if (!strcmp("http.minsessions", var)) {
 		min_curl_sessions = git_config_int(var, value);
 #ifndef USE_CURL_MULTI
@@ -282,7 +287,6 @@ 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,
@@ -307,6 +311,11 @@ static CURL *get_curl_handle(void)
 	if (curl_ftp_no_epsv)
 		curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 
+#ifdef CURLOPT_USE_SSL
+	if (curl_ssl_try)
+		curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
+#endif
+
 	if (curl_http_proxy) {
 		curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 		curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
@@ -506,6 +515,7 @@ 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);
 	if (http_auth.password)
 		init_curl_http_auth(slot->curl);
 
@@ -761,6 +771,25 @@ char *get_remote_object_url(const char *url, const char *hex,
 
 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;
@@ -825,6 +854,8 @@ static int http_request(const char *url, struct strbuf *type,
 	strbuf_addstr(&buf, "Pragma:");
 	if (options & HTTP_NO_CACHE)
 		strbuf_addstr(&buf, " no-cache");
+	if (options & HTTP_KEEP_ERROR)
+		curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
 
 	headers = curl_slist_append(headers, buf.buf);
 
@@ -836,7 +867,8 @@ static int http_request(const char *url, struct strbuf *type,
 		run_active_slot(slot);
 		ret = handle_curl_result(&results);
 	} else {
-		error("Unable to start HTTP request for %s", url);
+		snprintf(curl_errorstr, sizeof(curl_errorstr),
+			 "failed to start HTTP request");
 		ret = HTTP_START_FAILED;
 	}
 
@@ -862,6 +894,22 @@ static int http_request_reauth(const char *url,
 	int ret = http_request(url, type, result, target, options);
 	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 & HTTP_KEEP_ERROR) {
+		switch (target) {
+		case HTTP_REQUEST_STRBUF:
+			strbuf_reset(result);
+			break;
+		default:
+			die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
+		}
+	}
 	return http_request(url, type, result, target, options);
 }
 
@@ -903,15 +951,6 @@ cleanup:
 	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", curl_errorstr, url);
-
-	return ret;
-}
-
 int http_fetch_ref(const char *base, struct ref *ref)
 {
 	char *url;