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MINOR: proto-http: Add sample fetch wich returns all HTTP headers

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The sample fetch returns all headers including the last jump line.
The last jump line is used to determine if the block of headers is
truncated or not.
This commit is contained in:
Thierry FOURNIER 2017-04-19 15:15:14 +02:00 committed by Willy Tarreau
parent 5617dce27d
commit d7d8881543
2 changed files with 32 additions and 0 deletions
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6
doc/configuration.txt
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@ -14167,6 +14167,12 @@ payload_lv(<offset1>,<length>[,<offset2>]) : binary (deprecated)
(eg: "stick on", "stick match"), and for "res.payload_lv" when used in the
context of a response such as in "stick store response".
req.hdrs : string
Returns the current request headers as string including the last empty line
separating headers from the request body. The last empty line can be used to
detect a truncated header block. This sample fetch is useful for some SPOE
headers analyzers and for advanced logging.
req.hdrs_bin : binary
Returns the current request headers contained in preparsed binary form. This
is useful for offloading some processing with SPOE. Each string is described

26
src/proto_http.c
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@ -10437,6 +10437,31 @@ smp_fetch_uniqueid(const struct arg *args, struct sample *smp, const char *kw, v
return 1;
}
/* Returns a string block containing all headers including the
* empty line wich separes headers from the body. This is useful
* form some headers analysis.
*/
static int
smp_fetch_hdrs(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
struct http_msg *msg;
struct hdr_idx *idx;
struct http_txn *txn;
CHECK_HTTP_MESSAGE_FIRST();
txn = smp->strm->txn;
idx = &txn->hdr_idx;
msg = &txn->req;
smp->data.type = SMP_T_STR;
smp->data.u.str.str = msg->chn->buf->p + hdr_idx_first_pos(idx);
smp->data.u.str.len = msg->eoh - hdr_idx_first_pos(idx) + 1 +
(msg->chn->buf->p[msg->eoh] == '\r');
return 1;
}
/* Returns the header request in a length/value encoded format.
* This is useful for exchanges with the SPOE.
*
@ -13457,6 +13482,7 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
{ "req.body_size", smp_fetch_body_size, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV },
{ "req.body_param", smp_fetch_body_param, ARG1(0,STR), NULL, SMP_T_BIN, SMP_USE_HRQHV },
{ "req.hdrs", smp_fetch_hdrs, 0, NULL, SMP_T_BIN, SMP_USE_HRQHV },
{ "req.hdrs_bin", smp_fetch_hdrs_bin, 0, NULL, SMP_T_BIN, SMP_USE_HRQHV },
/* HTTP version on the response path */