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Implement and document support for an HTTP_REFERER environment variable.

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PR:		28171
Submitted by:	Andre Albsmeier <andre.albsmeier@mchp.siemens.de>
Approved by:	re (bmah)
MFC after:	1 week
This commit is contained in:
Dag-Erling Smørgrav 2002-11-28 12:07:15 +00:00
parent fdff30d256
commit d5216a4fb7
2 changed files with 26 additions and 12 deletions
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5
lib/libfetch/fetch.3
View File

@ -511,6 +511,11 @@ variable.
This variable is used if and only if connected to an HTTP proxy, and This variable is used if and only if connected to an HTTP proxy, and
is ignored if a user and/or a password were specified in the proxy is ignored if a user and/or a password were specified in the proxy
URL. URL.
.It Ev HTTP_REFERER
Specifies the referer URL to use for HTTP requests.
If set to
.Dq auto ,
the document URL will be used as referer URL.
.It Ev HTTP_USER_AGENT .It Ev HTTP_USER_AGENT
Specifies the User-Agent string to use for HTTP requests. Specifies the User-Agent string to use for HTTP requests.
This can be useful when working with HTTP origin or proxy servers that This can be useful when working with HTTP origin or proxy servers that

33
lib/libfetch/http.c
View File

@ -776,10 +776,7 @@ _http_request(struct url *URL, const char *op, struct url_stat *us,
const char *p; const char *p;
FILE *f; FILE *f;
hdr_t h; hdr_t h;
char *host; char hbuf[MAXHOSTNAMELEN + 7], *host;
#ifdef INET6
char hbuf[MAXHOSTNAMELEN + 1];
#endif
direct = CHECK_FLAG('d'); direct = CHECK_FLAG('d');
noredirect = CHECK_FLAG('A'); noredirect = CHECK_FLAG('A');
@ -831,24 +828,29 @@ _http_request(struct url *URL, const char *op, struct url_stat *us,
host = hbuf; host = hbuf;
} }
#endif #endif
if (url->port != _fetch_default_port(url->scheme)) {
if (host != hbuf) {
strcpy(hbuf, host);
host = hbuf;
}
snprintf(hbuf + strlen(hbuf),
sizeof(hbuf) - strlen(hbuf), ":%d", url->port);
}
/* send request */ /* send request */
if (verbose) if (verbose)
_fetch_info("requesting %s://%s:%d%s", _fetch_info("requesting %s://%s%s",
url->scheme, host, url->port, url->doc); url->scheme, host, url->doc);
if (purl) { if (purl) {
_http_cmd(conn, "%s %s://%s:%d%s HTTP/1.1", _http_cmd(conn, "%s %s://%s%s HTTP/1.1",
op, url->scheme, host, url->port, url->doc); op, url->scheme, host, url->doc);
} else { } else {
_http_cmd(conn, "%s %s HTTP/1.1", _http_cmd(conn, "%s %s HTTP/1.1",
op, url->doc); op, url->doc);
} }
/* virtual host */ /* virtual host */
if (url->port == _fetch_default_port(url->scheme)) _http_cmd(conn, "Host: %s", host);
_http_cmd(conn, "Host: %s", host);
else
_http_cmd(conn, "Host: %s:%d", host, url->port);
/* proxy authorization */ /* proxy authorization */
if (purl) { if (purl) {
@ -874,6 +876,13 @@ _http_request(struct url *URL, const char *op, struct url_stat *us,
} }
/* other headers */ /* other headers */
if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') {
if (strcasecmp(p, "auto") == 0)
_http_cmd(conn, "Referer: %s://%s%s",
url->scheme, host, url->doc);
else
_http_cmd(conn, "Referer: %s", p);
}
if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0') if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0')
_http_cmd(conn, "User-Agent: %s", p); _http_cmd(conn, "User-Agent: %s", p);
else else