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MINOR: http: add body_param fetch 

This fetch returns one body param or the list of each body param.
This first version runs only with one chunk.
This commit is contained in:
Thierry FOURNIER 2015-05-19 14:45:09 +02:00 committed by Willy Tarreau
parent 0948d41a12
commit e28c49975a
1 changed files with 57 additions and 0 deletions
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57
src/proto_http.c
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@ -11651,6 +11651,62 @@ smp_fetch_url_param(const struct arg *args, struct sample *smp, const char *kw,
return smp_fetch_param(delim, name, name_len, args, smp, kw, private);
}
/* This function iterates over each parameter of the body. This requires
* that the body has been waited for using http-buffer-request. It uses
* ctx->a[0] and ctx->a[1] to store the beginning and end of the current
* parameter. An optional parameter name is passed in args[0], otherwise
* any parameter is considered.
*/
static int
smp_fetch_body_param(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
struct http_txn *txn = smp->strm->txn;
struct http_msg *msg;
unsigned long len;
unsigned long block1;
char *body;
const char *name;
int name_len;
if (!args || (args[0].type && args[0].type != ARGT_STR))
return 0;
name = "";
name_len = 0;
if (args[0].type == ARGT_STR) {
name = args[0].data.str.str;
name_len = args[0].data.str.len;
}
if (!smp->ctx.a[0]) { // first call, find the query string
CHECK_HTTP_MESSAGE_FIRST();
if ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_REQ)
msg = &txn->req;
else
msg = &txn->rsp;
len = http_body_bytes(msg);
body = b_ptr(msg->chn->buf, -http_data_rewind(msg));
block1 = len;
if (block1 > msg->chn->buf->data + msg->chn->buf->size - body)
block1 = msg->chn->buf->data + msg->chn->buf->size - body;
if (block1 == len) {
/* buffer is not wrapped (or empty) */
smp->ctx.a[0] = body;
smp->ctx.a[1] = body + len;
}
else {
/* buffer is wrapped, we need to defragment it */
smp->ctx.a[0] = body;
smp->ctx.a[1] = body + block1;
}
}
return smp_fetch_param('&', name, name_len, args, smp, kw, private);
}
/* Return the signed integer value for the specified url parameter (see url_param
* above).
*/
@ -12471,6 +12527,7 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
{ "req.body", smp_fetch_body, 0, NULL, SMP_T_BIN, SMP_USE_HRQHV },
{ "req.body_len", smp_fetch_body_len, 0, NULL, SMP_T_UINT, SMP_USE_HRQHV },
{ "req.body_size", smp_fetch_body_size, 0, NULL, SMP_T_UINT, SMP_USE_HRQHV },
{ "req.body_param", smp_fetch_body_param, ARG1(0,STR), NULL, SMP_T_BIN, SMP_USE_HRQHV },
/* HTTP version on the response path */
{ "res.ver", smp_fetch_stver, 0, NULL, SMP_T_STR, SMP_USE_HRSHV },