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alt-svc: send Alt-Used: in redirected requests

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RFC 7838 section 5:

   When using an alternative service, clients SHOULD include an Alt-Used
   header field in all requests.

Removed CURLALTSVC_ALTUSED again (feature is still EXPERIMENTAL thus
this is deemed ok).

You can disable sending this header just like you disable any other HTTP
header in libcurl.

Closes #4199
This commit is contained in:
Daniel Stenberg 2019-08-07 20:43:18 +02:00
parent 026840e35c
commit 98c3f14871
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GPG key ID: 5CC908FDB71E12C2
5 changed files with 17 additions and 4 deletions
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16
lib/http.c
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@ -1998,6 +1998,7 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
const char *httpstring;
Curl_send_buffer *req_buffer;
curl_off_t postsize = 0; /* curl_off_t to handle large file sizes */
char *altused = NULL;
/* Always consider the DO phase done after this function call, even if there
may be parts of the request that is not yet sent, since we can deal with
@ -2592,6 +2593,14 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
if(result)
return result;
#ifdef USE_ALTSVC
if(conn->bits.altused && !Curl_checkheaders(conn, "Alt-Used")) {
altused = aprintf("Alt-Used: %s:%d\r\n",
conn->conn_to_host.name, conn->conn_to_port);
if(!altused)
return CURLE_OUT_OF_MEMORY;
}
#endif
result =
Curl_add_bufferf(&req_buffer,
"%s" /* ftp typecode (;type=x) */
@ -2606,7 +2615,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
"%s" /* accept-encoding */
"%s" /* referer */
"%s" /* Proxy-Connection */
"%s",/* transfer-encoding */
"%s" /* transfer-encoding */
"%s",/* Alt-Used */
ftp_typecode,
httpstring,
@ -2632,13 +2642,15 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
!conn->bits.tunnel_proxy &&
!Curl_checkProxyheaders(conn, "Proxy-Connection"))?
"Proxy-Connection: Keep-Alive\r\n":"",
te
te,
altused ? altused : ""
);
/* clear userpwd and proxyuserpwd to avoid re-using old credentials
* from re-used connections */
Curl_safefree(conn->allocptr.userpwd);
Curl_safefree(conn->allocptr.proxyuserpwd);
free(altused);
if(result)
return result;