Date: Fri, 15 Jun 2001 10:26:22 +0200 (CEST) From: Andre Albsmeier <andre.albsmeier@mchp.siemens.de> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/28171: [PATCH] to support a HTTP_REFERER env variable in libfetch Message-ID: <200106150826.f5F8QMA50898@curry.mchp.siemens.de>
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>Number: 28171
>Category: bin
>Synopsis: [PATCH] to support a HTTP_REFERER env variable in libfetch
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Jun 15 01:30:04 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Andre Albsmeier
>Release: FreeBSD 4.3-STABLE i386
>Organization:
>Environment:
All FreeBSD systems
>Description:
Some webservers insist on a Referer: header in http requests.
>How-To-Repeat:
>Fix:
The patch is similar as for HTTP_USER_AGENT. Additionally, if
HTTP_REFERER=auto is used, an appropriate referer is constructed
from the URL (this is OK in 95% of all cases).
--- lib/libfetch/http.c.ORI Fri Jun 15 09:21:40 2001
+++ lib/libfetch/http.c Fri Jun 15 10:14:38 2001
@@ -775,6 +775,15 @@
}
/* other headers */
+ if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') {
+ if (strcmp(p,"auto") == 0) {
+ char ps[7];
+ snprintf (ps,sizeof(ps),":%d",url->port);
+ _http_cmd(fd, "Referer: %s://%s%s%s",
+ url->scheme, host, url->port == 80 ? "" : ps, url->doc);
+ } else
+ _http_cmd(fd,"Referer: %s",p);
+ }
if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0')
_http_cmd(fd, "User-Agent: %s", p);
else
--- lib/libfetch/fetch.3.ORI Fri Jun 15 09:46:18 2001
+++ lib/libfetch/fetch.3 Fri Jun 15 10:16:14 2001
@@ -491,6 +491,10 @@
Specifies the User-Agent string to use for HTTP requests.
This can be useful when working with HTTP origin or proxy servers that
differentiate between usder agents.
+.It Ev HTTP_REFERER
+Specifies the Referer string to use for HTTP requests.
+This can be useful when working with HTTP servers that insist in them.
+When set to "auto" the URL is taken to construct a referer value.
.El
.Sh SEE ALSO
.Xr fetch 1 ,
>Release-Note:
>Audit-Trail:
>Unformatted:
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