From: David Edmondson <david.edmondson@oracle.com>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
David Edmondson <david.edmondson@oracle.com>,
qemu-block@nongnu.org, Max Reitz <mreitz@redhat.com>
Subject: [PATCH v2 1/2] block/curl: HTTP header fields allow whitespace around values
Date: Fri, 21 Feb 2020 16:32:37 +0000 [thread overview]
Message-ID: <20200221163238.60688-2-david.edmondson@oracle.com> (raw)
In-Reply-To: <20200221163238.60688-1-david.edmondson@oracle.com>
RFC 7230 section 3.2 indicates that whitespace is permitted between
the field name and field value and after the field value.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
---
block/curl.c | 31 +++++++++++++++++++++++++++----
1 file changed, 27 insertions(+), 4 deletions(-)
diff --git a/block/curl.c b/block/curl.c
index f86299378e38..f9ffb7f4e2bf 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -214,11 +214,34 @@ static size_t curl_header_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
{
BDRVCURLState *s = opaque;
size_t realsize = size * nmemb;
- const char *accept_line = "Accept-Ranges: bytes";
+ const char *header = (char *)ptr;
+ const char *end = header + realsize;
+ const char *accept_ranges = "Accept-Ranges:";
+ const char *bytes = "bytes";
- if (realsize >= strlen(accept_line)
- && strncmp((char *)ptr, accept_line, strlen(accept_line)) == 0) {
- s->accept_range = true;
+ if (realsize >= strlen(accept_ranges)
+ && strncmp(header, accept_ranges, strlen(accept_ranges)) == 0) {
+
+ char *p = strchr(header, ':') + 1;
+
+ /* Skip whitespace between the header name and value. */
+ while (p < end && *p && g_ascii_isspace(*p)) {
+ p++;
+ }
+
+ if (end - p >= strlen(bytes)
+ && strncmp(p, bytes, strlen(bytes)) == 0) {
+
+ /* Check that there is nothing but whitespace after the value. */
+ p += strlen(bytes);
+ while (p < end && *p && g_ascii_isspace(*p)) {
+ p++;
+ }
+
+ if (p == end || !*p) {
+ s->accept_range = true;
+ }
+ }
}
return realsize;
--
2.24.1
next prev parent reply other threads:[~2020-02-21 16:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 16:32 [PATCH v2 0/2] block/curl: Improve HTTP header parsing David Edmondson
2020-02-21 16:32 ` David Edmondson [this message]
2020-02-21 16:32 ` [PATCH v2 2/2] block/curl: HTTP header field names are case insensitive David Edmondson
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