http: support file handles for HTTP_KEEP_ERROR

HTTP_KEEP_ERROR makes it easy to debug HTTP transport errors. In order to make HTTP_KEEP_ERROR enabled for all requests, file handles need to be supported. Signed-off-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Masaya Suzuki committed Jan 10, 2019 at 11:33 UTC 8dd2e88a923bd24775182f0a507c993e06a0aacb
1 file changed +13 -3
http.c
+13 -3
@@ -1952,16 +1952,26 @@ static int http_request_reauth(const char *url,
1952 /*
1953 * If we are using KEEP_ERROR, the previous request may have
1954 * put cruft into our output stream; we should clear it out before
1955 - * making our next request. We only know how to do this for
1956 - * the strbuf case, but that is enough to satisfy current callers.
1955 + * making our next request.
1956 */
1957 if (options && options->keep_error) {
1958 switch (target) {
1959 case HTTP_REQUEST_STRBUF:
1960 strbuf_reset(result);
1961 break;
1962 + case HTTP_REQUEST_FILE:
1963 + if (fflush(result)) {
1964 + error_errno("unable to flush a file");
1965 + return HTTP_START_FAILED;
1966 + }
1967 + rewind(result);
1968 + if (ftruncate(fileno(result), 0) < 0) {
1969 + error_errno("unable to truncate a file");
1970 + return HTTP_START_FAILED;
1971 + }
1972 + break;
1973 default:
1964 - BUG("HTTP_KEEP_ERROR is only supported with strbufs");
1974 + BUG("Unknown http_request target");
1975 }
1976 }
1977