[PATCH v4 1/5] http: support file handles for HTTP_KEEP_ERROR
To
masayasuzuki@google.com
Cc
git@vger.kernel.org
jrnieder@gmail.com
peff@peff.net
sunshine@sunshineco.com
szeder.dev@gmail.com
From
Masaya Suzuki
See Also
Prev Ref 1
Date
2019-01-10 19:33:46 UTC
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>
---
 http.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/http.c b/http.c
index 0b6807cef9..4eccf4c5d8 100644
--- a/http.c
+++ b/http.c
@@ -1991,16 +1991,26 @@ static int http_request_reauth(const char *url,
 	/*
 	 * 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.
+	 * making our next request.
 	 */
 	if (options && options->keep_error) {
 		switch (target) {
 		case HTTP_REQUEST_STRBUF:
 			strbuf_reset(result);
 			break;
+		case HTTP_REQUEST_FILE:
+			if (fflush(result)) {
+				error_errno("unable to flush a file");
+				return HTTP_START_FAILED;
+			}
+			rewind(result);
+			if (ftruncate(fileno(result), 0) < 0) {
+				error_errno("unable to truncate a file");
+				return HTTP_START_FAILED;
+			}
+			break;
 		default:
-			BUG("HTTP_KEEP_ERROR is only supported with strbufs");
+			BUG("Unknown http_request target");
 		}
 	}
 
-- 
2.20.1.97.g81188d93c3-goog