MINOR: samples: add a function to fetch and convert any sample to a string
Any sample type can now easily be converted to a string that can be used
anywhere. This will be used for logging and passing information in headers.
diff --git a/include/proto/sample.h b/include/proto/sample.h
index e6808dd..5241a3a 100644
--- a/include/proto/sample.h
+++ b/include/proto/sample.h
@@ -34,6 +34,8 @@
struct sample *sample_process(struct proxy *px, struct session *l4,
void *l7, unsigned int dir, struct sample_expr *expr,
struct sample *p);
+struct sample *sample_fetch_string(struct proxy *px, struct session *l4, void *l7,
+ unsigned int opt, struct sample_expr *expr);
void sample_register_fetches(struct sample_fetch_kw_list *psl);
void sample_register_convs(struct sample_conv_kw_list *psl);
struct chunk *sample_get_trash_chunk(void);
diff --git a/src/sample.c b/src/sample.c
index f5828fa..3c0d01e 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -539,6 +539,31 @@
return p;
}
+/*
+ * Process a fetch + format conversion as defined by the sample expression <expr>
+ * on request or response considering the <opt> parameter. The output is always of
+ * type string. Returns either NULL if no sample could be extracted, or a pointer
+ * to the converted result stored in static temp_smp in format string.
+ */
+struct sample *sample_fetch_string(struct proxy *px, struct session *l4, void *l7,
+ unsigned int opt, struct sample_expr *expr)
+{
+ struct sample *smp;
+
+ smp = sample_process(px, l4, l7, opt, expr, NULL);
+ if (!smp)
+ return NULL;
+
+ if (!sample_casts[smp->type][SMP_T_CSTR])
+ return NULL;
+
+ if (!sample_casts[smp->type][SMP_T_CSTR](smp))
+ return NULL;
+
+ smp->type = SMP_T_CSTR;
+ return smp;
+}
+
/*****************************************************************/
/* Sample format convert functions */
/* These functions set the data type on return. */