lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include "algo_splaytree.h"
#include "log.h"
#include "buffer.h"
#include "request.h"
#include "http_header.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
/**
* this is a uploadprogress for a lighttpd plugin
*
*/
typedef struct {
buffer r_id;
request_st *r;
int ndx;
} request_map_entry;
typedef struct {
const buffer *progress_url;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
splay_tree *request_map;
} plugin_data;
/**
*
* request maps
*
*/
static request_map_entry *
request_map_entry_init (request_st * const r, const char *r_id, size_t idlen)
{
request_map_entry * const rme = calloc(1, sizeof(request_map_entry));
force_assert(rme);
rme->r = r;
rme->ndx = splaytree_djbhash(r_id, idlen);
buffer_copy_string_len(&rme->r_id, r_id, idlen);
return rme;
}
static void
request_map_entry_free (request_map_entry *rme)
{
free(rme->r_id.ptr);
free(rme);
}
static void
request_map_remove (plugin_data * const p, request_map_entry * const rme)
{
splay_tree ** const sptree = &p->request_map;
*sptree = splaytree_splay(*sptree, rme->ndx);
if (NULL != *sptree && (*sptree)->key == rme->ndx) {
request_map_entry_free((*sptree)->data);
*sptree = splaytree_delete(*sptree, (*sptree)->key);
}
}
static request_map_entry *
request_map_insert (plugin_data * const p, request_map_entry * const rme)
{
splay_tree ** const sptree = &p->request_map;
*sptree = splaytree_splay(*sptree, rme->ndx);
if (NULL == *sptree || (*sptree)->key != rme->ndx) {
*sptree = splaytree_insert(*sptree, rme->ndx, rme);
return rme;
}
else { /* collision (not expected); leave old entry and forget new */
/*(old entry is referenced elsewhere, so new entry is freed here)*/
request_map_entry_free(rme);
return NULL;
}
}
__attribute_pure__
static request_st *
request_map_get_request (plugin_data * const p, const char * const r_id, const size_t idlen)
{
splay_tree ** const sptree = &p->request_map;
int ndx = splaytree_djbhash(r_id, idlen);
*sptree = splaytree_splay(*sptree, ndx);
if (NULL != *sptree && (*sptree)->key == ndx) {
request_map_entry * const rme = (*sptree)->data;
if (buffer_eq_slen(&rme->r_id, r_id, idlen))
return rme->r;
}
return NULL;
}
static void
request_map_free (plugin_data * const p)
{
splay_tree *sptree = p->request_map;
p->request_map = NULL;
while (sptree) {
request_map_entry_free(sptree->data);
sptree = splaytree_delete(sptree, sptree->key);
}
}
INIT_FUNC(mod_uploadprogress_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_uploadprogress_free) {
request_map_free((plugin_data *)p_d);
}
static void mod_uploadprogress_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) {
switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */
case 0: /* upload-progress.progress-url */
pconf->progress_url = cpv->v.b;
break;
default:/* should not happen */
return;
}
}
static void mod_uploadprogress_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_uploadprogress_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_uploadprogress_patch_config(request_st * const r, plugin_data * const p) {
p->conf = p->defaults; /* copy small struct instead of memcpy() */
/*memcpy(&p->conf, &p->defaults, sizeof(plugin_config));*/
for (int i = 1, used = p->nconfig; i < used; ++i) {
if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id))
mod_uploadprogress_merge_config(&p->conf,
p->cvlist + p->cvlist[i].v.u2[0]);
}
}
SETDEFAULTS_FUNC(mod_uploadprogress_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("upload-progress.progress-url"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ NULL, 0,
T_CONFIG_UNSET,
T_CONFIG_SCOPE_UNSET }
};
plugin_data * const p = p_d;
if (!config_plugin_values_init(srv, p, cpk, "mod_uploadprogress"))
return HANDLER_ERROR;
/* process and validate config directives
* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* upload-progress.progress-url */
if (buffer_is_blank(cpv->v.b))
cpv->v.b = NULL;
break;
default:/* should not happen */
break;
}
}
}
/* initialize p->defaults from global config context */
if (p->nconfig > 0 && p->cvlist->v.u2[1]) {
const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0];
if (-1 != cpv->k_id)
mod_uploadprogress_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
#define REQID_LEN 32
static const char * mod_uploadprogress_get_reqid (request_st * const r) {
const char *idstr;
uint32_t len;
int pathinfo = 0;
const buffer *h = http_header_request_get(r, HTTP_HEADER_OTHER,
CONST_STR_LEN("X-Progress-ID"));
if (NULL != h)
idstr = h->ptr;
else if (!buffer_is_blank(&r->uri.query)
&& (idstr = strstr(r->uri.query.ptr, "X-Progress-ID=")))
idstr += sizeof("X-Progress-ID=")-1;
else { /*(path-info is not known at this point in request)*/
idstr = r->uri.path.ptr;
len = buffer_clen(&r->uri.path);
if (len > REQID_LEN && idstr[len-REQID_LEN-1] == '/') {
pathinfo = 1;
idstr += len - REQID_LEN;
}
else
return NULL;
}
/* request must contain ID of REQID_LEN bytes */
for (len = 0; light_isxdigit(idstr[len]); ++len) ;
if (len != REQID_LEN) {
if (!pathinfo) { /*(reduce false positive noise in error log)*/
log_error(r->conf.errh, __FILE__, __LINE__,
"invalid progress-id; non-xdigit or len != %d: %s",
REQID_LEN, idstr);
}
return NULL;
}
return idstr;
}
/**
*
* the idea:
*
* for the first request we check if it is a post-request
*
* if no, move out, don't care about them
*
* if yes, take the connection structure and register it locally
* in the progress-struct together with an session-id (md5 ... )
*
* if the connections closes, cleanup the entry in the progress-struct
*
* a second request can now get the info about the size of the upload,
* the received bytes
*
*/
URIHANDLER_FUNC(mod_uploadprogress_uri_handler) {
plugin_data *p = p_d;
switch(r->http_method) {
case HTTP_METHOD_GET:
case HTTP_METHOD_POST: break;
default: return HANDLER_GO_ON;
}
mod_uploadprogress_patch_config(r, p);
if (!p->conf.progress_url) return HANDLER_GO_ON;
if (r->http_method == HTTP_METHOD_GET
&& !buffer_is_equal(&r->uri.path, p->conf.progress_url))
return HANDLER_GO_ON;
const char * const idstr = mod_uploadprogress_get_reqid(r);
if (NULL == idstr) return HANDLER_GO_ON;
if (r->http_method == HTTP_METHOD_POST) {
r->plugin_ctx[p->id] =
request_map_insert(p, request_map_entry_init(r, idstr, REQID_LEN));
return HANDLER_GO_ON;
} /* else r->http_method == HTTP_METHOD_GET */
r->resp_body_started = 1;
r->resp_body_finished = 1;
r->http_status = 200;
r->handler_module = NULL;
/* get the connection */
request_st * const post_r = request_map_get_request(p,idstr,REQID_LEN);
if (NULL == post_r) {
log_error(r->conf.errh, __FILE__, __LINE__, "ID not known: %.*s", REQID_LEN, idstr);
/* XXX: why is this not an XML response, too?
* (At least Content-Type is not set to text/xml) */
chunkqueue_append_mem(&r->write_queue, CONST_STR_LEN("not in progress"));
return HANDLER_FINISHED;
}
http_header_response_set(r, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/xml"));
/* just an attempt the force the IE/proxies to NOT cache the request ... doesn't help :( */
http_header_response_set(r, HTTP_HEADER_PRAGMA, CONST_STR_LEN("Pragma"), CONST_STR_LEN("no-cache"));
http_header_response_set(r, HTTP_HEADER_EXPIRES, CONST_STR_LEN("Expires"), CONST_STR_LEN("Thu, 19 Nov 1981 08:52:00 GMT"));
http_header_response_set(r, HTTP_HEADER_CACHE_CONTROL, CONST_STR_LEN("Cache-Control"), CONST_STR_LEN("no-store, no-cache, must-revalidate, post-check=0, pre-check=0"));
/* prepare XML */
buffer * const b = chunkqueue_append_buffer_open(&r->write_queue);
buffer_copy_string_len(b, CONST_STR_LEN(
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>"
"<upload>"
"<size>"));
buffer_append_int(b, post_r->reqbody_length);
buffer_append_string_len(b, CONST_STR_LEN(
"</size>"
"<received>"));
buffer_append_int(b, post_r->reqbody_queue.bytes_in);
buffer_append_string_len(b, CONST_STR_LEN(
"</received>"
"</upload>"));
chunkqueue_append_buffer_commit(&r->write_queue);
return HANDLER_FINISHED;
}
REQUESTDONE_FUNC(mod_uploadprogress_request_done) {
plugin_data *p = p_d;
request_map_entry * const rme = r->plugin_ctx[p->id];
if (rme) {
r->plugin_ctx[p->id] = NULL;
request_map_remove(p, rme);
}
return HANDLER_GO_ON;
}
int mod_uploadprogress_plugin_init(plugin *p);
int mod_uploadprogress_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "uploadprogress";
p->init = mod_uploadprogress_init;
p->handle_uri_clean = mod_uploadprogress_uri_handler;
p->handle_request_reset = mod_uploadprogress_request_done;
p->set_defaults = mod_uploadprogress_set_defaults;
p->cleanup = mod_uploadprogress_free;
return 0;
}