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Accelerate mod_dumpio processing;

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* drop a frequent query for the mod configuration (pass as f->ctx)
 * drop one copy, at least for ASCII

and ensure larger buffers are logged in their entirety.  Some clarity
in output can be added by designating continuations vs first lines.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@750126 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
William A. Rowe Jr
2009-03-04 19:55:09 +00:00
parent c27df771e8
commit 22f74392e9
1 changed files with 58 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
modules/debugging/mod_dumpio.c
View File

@ -41,16 +41,19 @@ typedef struct dumpio_conf_t {
int loglevel;
} dumpio_conf_t;
/* consider up to 80 additional characters, and factor the longest
* line length of all \xNN sequences; log_error cannot record more
* than MAX_STRING_LEN characters.
*/
#define dumpio_MAX_STRING_LEN MAX_STRING_LEN / 4 - 80
/*
* Workhorse function: simply log to the current error_log
* info about the data in the bucket as well as the data itself
*/
static void dumpit(ap_filter_t *f, apr_bucket *b)
static void dumpit(ap_filter_t *f, apr_bucket *b, dumpio_conf_t *ptr)
{
conn_rec *c = f->c;
dumpio_conf_t *ptr =
(dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
&dumpio_module);
ap_log_error(APLOG_MARK, ptr->loglevel, 0, c->base_server,
"mod_dumpio: %s (%s-%s): %" APR_SIZE_T_FMT " bytes",
@ -59,33 +62,53 @@ static void dumpit(ap_filter_t *f, apr_bucket *b)
b->type->name,
b->length) ;
if (!(APR_BUCKET_IS_METADATA(b))) {
if (!(APR_BUCKET_IS_METADATA(b)))
{
#if APR_CHARSET_EBCDIC
char xlatebuf[dumpio_MAX_STRING_LEN + 1];
#endif
const char *buf;
apr_size_t nbytes;
char *obuf;
if (apr_bucket_read(b, &buf, &nbytes, APR_BLOCK_READ) == APR_SUCCESS) {
if (nbytes) {
obuf = malloc(nbytes+1); /* use pool? */
memcpy(obuf, buf, nbytes);
apr_size_t logbytes;
apr_status_t rv = apr_bucket_read(b, &buf, &nbytes, APR_BLOCK_READ);
if (rv == APR_SUCCESS)
{
while (nbytes)
{
logbytes = nbytes;
if (logbytes > dumpio_MAX_STRING_LEN)
logbytes = dumpio_MAX_STRING_LEN;
nbytes -= logbytes;
#if APR_CHARSET_EBCDIC
ap_xlate_proto_from_ascii(obuf, nbytes);
#endif
obuf[nbytes] = '\0';
memcpy(xlatebuf, buf, logbytes);
ap_xlate_proto_from_ascii(xlatebuf, logbytes);
xlatebuf[logbytes] = '\0';
ap_log_error(APLOG_MARK, ptr->loglevel, 0, c->base_server,
"mod_dumpio: %s (%s-%s): %s",
f->frec->name,
(APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
b->type->name,
obuf);
free(obuf);
"mod_dumpio: %s (%s-%s): %s", f->frec->name,
(APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
b->type->name, xlatebuf);
#else
/* XXX: Seriously flawed; we do not pay attention to embedded
* \0's in the request body, these should be escaped; however,
* the logging function already performs a significant amount
* of escaping, and so any escaping would be double-escaped.
* The coding solution is to throw away the current logic
* within ap_log_error, and introduce new vformatter %-escapes
* for escaping text, and for binary text (fixed len strings).
*/
ap_log_error(APLOG_MARK | APLOG_NOERRNO, ptr->loglevel, 0, c->base_server,
"mod_dumpio: %s (%s-%s): %.*s", f->frec->name,
(APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
b->type->name, logbytes, buf);
#endif
}
} else {
ap_log_error(APLOG_MARK, ptr->loglevel, 0, c->base_server,
"mod_dumpio: %s (%s-%s): %s",
f->frec->name,
(APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
b->type->name,
"error reading data");
ap_log_error(APLOG_MARK, ptr->loglevel, rv, c->base_server,
"mod_dumpio: %s (%s-%s): %s", f->frec->name,
(APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
b->type->name, "error reading data");
}
}
}
@ -106,7 +129,7 @@ static int dumpio_input_filter (ap_filter_t *f, apr_bucket_brigade *bb,
apr_bucket *b;
apr_status_t ret;
conn_rec *c = f->c;
dumpio_conf_t *ptr =
dumpio_conf_t *ptr = f->ctx;
(dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
&dumpio_module);
@ -121,7 +144,7 @@ static int dumpio_input_filter (ap_filter_t *f, apr_bucket_brigade *bb,
if (ret == APR_SUCCESS) {
for (b = APR_BRIGADE_FIRST(bb); b != APR_BRIGADE_SENTINEL(bb); b = APR_BUCKET_NEXT(b)) {
dumpit(f, b);
dumpit(f, b, ptr);
}
} else {
ap_log_error(APLOG_MARK, ptr->loglevel, 0, c->base_server,
@ -135,7 +158,7 @@ static int dumpio_output_filter (ap_filter_t *f, apr_bucket_brigade *bb)
{
apr_bucket *b;
conn_rec *c = f->c;
dumpio_conf_t *ptr =
dumpio_conf_t *ptr = f->ctx;
(dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
&dumpio_module);
@ -149,7 +172,7 @@ static int dumpio_output_filter (ap_filter_t *f, apr_bucket_brigade *bb)
apr_bucket *flush = apr_bucket_flush_create(f->c->bucket_alloc);
APR_BUCKET_INSERT_BEFORE(b, flush);
}
dumpit(f, b);
dumpit(f, b, ptr);
}
return ap_pass_brigade(f->next, bb) ;
@ -157,14 +180,15 @@ static int dumpio_output_filter (ap_filter_t *f, apr_bucket_brigade *bb)
static int dumpio_pre_conn(conn_rec *c, void *csd)
{
dumpio_conf_t *ptr =
(dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
&dumpio_module);
dumpio_conf_t *ptr;
ptr = (dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
&dumpio_module);
if (ptr->enable_input)
ap_add_input_filter("DUMPIO_IN", NULL, NULL, c);
ap_add_input_filter("DUMPIO_IN", ptr, NULL, c);
if (ptr->enable_output)
ap_add_output_filter("DUMPIO_OUT", NULL, NULL, c);
ap_add_output_filter("DUMPIO_OUT", ptr, NULL, c);
return OK;
}