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MINOR: http: smp_fetch_capture_header_* fetch captured headers

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Allows you to fetch a captured header content with capture.res.hdr()
and capture.req.hdr().
This commit is contained in:
William Lallemand 2014-01-28 18:14:25 +01:00 committed by Willy Tarreau
parent 12833bbca5
commit a43ba4eee0
2 changed files with 66 additions and 0 deletions
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10
doc/configuration.txt
View File

@ -10456,6 +10456,16 @@ cookie([<name>]) : string (deprecated)
ambiguously uses the direction based on the context where it is used.
See also : "appsession".
capture.req.hdr(<idx>) : string
This extracts the content of the header captured by the "capture request
header", idx is the position of the capture keyword in the configuration.
See also: "capture request header"
capture.res.hdr(<idx>) : string
This extracts the content of the header captured by the "capture response
header", idx is the position of the capture keyword in the configuration.
See also: "capture response header"
hdr([<name>[,<occ>]]) : string
This is equivalent to req.hdr() when used on requests, and to res.hdr() when
used on responses. Please refer to these respective fetches for more details.

56
src/proto_http.c
View File

@ -9646,6 +9646,58 @@ extract_cookie_value(char *hdr, const char *hdr_end,
return NULL;
}
/* Fetch a captured HTTP request header. The index is the position of
* the "capture" option in the configuration file
*/
static int
smp_fetch_capture_header_req(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
const struct arg *args, struct sample *smp, const char *kw)
{
struct proxy *fe = l4->fe;
struct http_txn *txn = l7;
int idx;
if (!args || args->type != ARGT_UINT)
return 0;
idx = args->data.uint;
if (idx > (fe->nb_req_cap - 1) || txn->req.cap == NULL || txn->req.cap[idx] == NULL)
return 0;
smp->type = SMP_T_CSTR;
smp->data.str.str = txn->req.cap[idx];
smp->data.str.len = strlen(txn->req.cap[idx]);
return 1;
}
/* Fetch a captured HTTP response header. The index is the position of
* the "capture" option in the configuration file
*/
static int
smp_fetch_capture_header_res(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
const struct arg *args, struct sample *smp, const char *kw)
{
struct proxy *fe = l4->fe;
struct http_txn *txn = l7;
int idx;
if (!args || args->type != ARGT_UINT)
return 0;
idx = args->data.uint;
if (idx > (fe->nb_rsp_cap - 1) || txn->rsp.cap == NULL || txn->rsp.cap[idx] == NULL)
return 0;
smp->type = SMP_T_CSTR;
smp->data.str.str = txn->rsp.cap[idx];
smp->data.str.len = strlen(txn->rsp.cap[idx]);
return 1;
}
/* Iterate over all cookies present in a message. The context is stored in
* smp->ctx.a[0] for the in-header position, smp->ctx.a[1] for the
* end-of-header-value, and smp->ctx.a[2] for the hdr_ctx. Depending on
@ -10204,6 +10256,10 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
{ "base32", smp_fetch_base32, 0, NULL, SMP_T_UINT, SMP_USE_HRQHV },
{ "base32+src", smp_fetch_base32_src, 0, NULL, SMP_T_BIN, SMP_USE_HRQHV },
/* capture are allocated and are permanent in the session */
{ "capture.req.hdr", smp_fetch_capture_header_req, ARG1(1, UINT), NULL, SMP_T_CSTR, SMP_USE_HRQHP },
{ "capture.res.hdr", smp_fetch_capture_header_res, ARG1(1, UINT), NULL, SMP_T_CSTR, SMP_USE_HRSHP },
/* cookie is valid in both directions (eg: for "stick ...") but cook*
* are only here to match the ACL's name, are request-only and are used
* for ACL compatibility only.