http: avoid disconnecting on 404s for loose objects

404s are common when fetching loose objects on static HTTP
servers, and reestablishing a connection for every single
404 adds additional latency.

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http-walker.c b/http-walker.c
index 9f28523..48f2df4 100644 (file)
--- a/http-walker.c
+++ b/http-walker.c
@@ -488,6 +488,15 @@ static int fetch_object(struct walker *walker, unsigned char *sha1)
                req->localfile = -1;
        }
 
+       /*
+        * we turned off CURLOPT_FAILONERROR to avoid losing a
+        * persistent connection and got CURLE_OK.
+        */
+       if (req->http_code == 404 && req->curl_result == CURLE_OK &&
+                       (starts_with(req->url, "http://") ||
+                        starts_with(req->url, "https://")))
+               req->curl_result = CURLE_HTTP_RETURNED_ERROR;
+
        if (obj_req->state == ABORTED) {
                ret = error("Request for %s aborted", hex);
        } else if (req->curl_result != CURLE_OK &&

diff --git a/http.c b/http.c
index df6dd01..6f12661 100644 (file)
--- a/http.c
+++ b/http.c
@@ -1855,8 +1855,19 @@ static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
        unsigned char expn[4096];
        size_t size = eltsize * nmemb;
        int posn = 0;
-       struct http_object_request *freq =
-               (struct http_object_request *)data;
+       struct http_object_request *freq = data;
+       struct active_request_slot *slot = freq->slot;
+
+       if (slot) {
+               CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
+                                               &slot->http_code);
+               if (c != CURLE_OK)
+                       die("BUG: curl_easy_getinfo for HTTP code failed: %s",
+                               curl_easy_strerror(c));
+               if (slot->http_code >= 400)
+                       return size;
+       }
+
        do {
                ssize_t retval = xwrite(freq->localfile,
                                        (char *) ptr + posn, size - posn);
@@ -1977,6 +1988,7 @@ struct http_object_request *new_http_object_request(const char *base_url,
        freq->slot = get_active_slot();
 
        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
+       curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);