Function http_request_recoverable

http.c:2403–2485

}

static int http_request_recoverable(const char *url,
			       void *result, int target,
			       struct http_get_options *options)
{
	static struct http_get_options empty_opts;
	int i = 3;
	int ret;
	int rate_limit_retries = http_max_retries;

	if (!options)
		options = &empty_opts;

	if (always_auth_proactively())
		credential_fill(the_repository, &http_auth, 1);

	ret = http_request(url, result, target, options);

	if (ret != HTTP_OK && ret != HTTP_REAUTH && ret != HTTP_RATE_LIMITED)
		return ret;

	/* If retries are disabled and we got a 429, fail immediately */
	if (ret == HTTP_RATE_LIMITED && !http_max_retries)
		return HTTP_ERROR;

	if (options->effective_url && options->base_url) {
		if (update_url_from_redirect(options->base_url,
					     url, options->effective_url)) {
			credential_from_url(&http_auth, options->base_url->buf);
			url = options->effective_url->buf;
		}
	}

	while ((ret == HTTP_REAUTH && --i) ||
	       (ret == HTTP_RATE_LIMITED && --rate_limit_retries)) {
		long retry_delay = -1;
		/*
		 * The previous request may have put cruft into our output stream; we
		 * should clear it out before making our next request.
		 */
		switch (target) {
		case HTTP_REQUEST_STRBUF:
			strbuf_reset(result);
			break;
		case HTTP_REQUEST_FILE: {
			FILE *f = result;
			if (fflush(f)) {
				error_errno("unable to flush a file");
				return HTTP_START_FAILED;
			}
			rewind(f);
			if (ftruncate(fileno(f), 0) < 0) {
				error_errno("unable to truncate a file");
				return HTTP_START_FAILED;
			}
			break;
		}
		default:
			BUG("Unknown http_request target");