lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include "base.h"
#include "log.h"
#include "buffer.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;
} request_map_entry;
typedef struct {
request_map_entry **ptr;
uint32_t used;
uint32_t size;
} request_map;
typedef struct {
const buffer *progress_url;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
request_map request_map;
} plugin_data;
/**
*
* request maps
*
*/
static void request_map_free_data(request_map *rm) {
for (uint32_t i = 0; i < rm->size; ++i) {
request_map_entry *rme = rm->ptr[i];
if (!rme) break;
if (rme->r_id) {
buffer_free(rme->r_id);
}
free(rme);
}
}
static int request_map_insert(request_map *rm, request_st * const r, const char *r_id, size_t idlen) {
request_map_entry *rme;
if (rm->used == rm->size) {
rm->size = rm->size ? (rm->size << 1) : 16;
force_assert(rm->size);
rm->ptr = realloc(rm->ptr, rm->size * sizeof(*(rm->ptr)));
memset(rm->ptr+rm->used, 0, (rm->size - rm->used)*sizeof(*(rm->ptr)));
}
if (rm->ptr[rm->used]) {
/* is already allocated, just reuse it */
rme = rm->ptr[rm->used];
} else {
rme = malloc(sizeof(*rme));
rme->r_id = buffer_init();
}
buffer_copy_string_len(rme->r_id, r_id, idlen);
rme->r = r;
rm->ptr[rm->used++] = rme;
return 0;
}
static request_st * request_map_get_request(request_map *rm, const char *r_id, size_t idlen) {
for (uint32_t i = 0; i < rm->used; ++i) {
request_map_entry *rme = rm->ptr[i];
if (buffer_is_equal_string(rme->r_id, r_id, idlen)) {
return rme->r; /* found request */
}
}
return NULL;
}
static int request_map_remove_request(request_map * const rm, const request_st * const r) {
for (uint32_t i = 0; i < rm->used; ++i) {
request_map_entry *rme = rm->ptr[i];
if (rme->r == r) {
/* found request */
buffer_clear(rme->r_id);
rme->r = NULL;
rm->used--;
/* swap positions with the last entry */
if (rm->used) {
rm->ptr[i] = rm->ptr[rm->used];
rm->ptr[rm->used] = rme;
}
return 1;
}
}
return 0;
}
INIT_FUNC(mod_uploadprogress_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_uploadprogress_free) {
plugin_data *p = p_d;
request_map_free_data(&p->request_map);
}
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;
/* 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;
}
/**
*
* 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;
size_t len;
char *id;
buffer *b;
request_st *post_r;
int pathinfo = 0;
if (buffer_string_is_empty(&r->uri.path)) return HANDLER_GO_ON;
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 (buffer_string_is_empty(p->conf.progress_url)) return HANDLER_GO_ON;
if (r->http_method == HTTP_METHOD_GET) {
if (!buffer_is_equal(&r->uri.path, p->conf.progress_url)) {
return HANDLER_GO_ON;
}
}
const buffer *h = http_header_request_get(r, HTTP_HEADER_OTHER, CONST_STR_LEN("X-Progress-ID"));
if (NULL != h) {
id = h->ptr;
} else if (!buffer_string_is_empty(&r->uri.query)
&& (id = strstr(r->uri.query.ptr, "X-Progress-ID="))) {
/* perhaps the POST request is using the query-string to pass the X-Progress-ID */
id += sizeof("X-Progress-ID=")-1;
} else {
/*(path-info is not known at this point in request)*/
id = r->uri.path.ptr;
len = buffer_string_length(&r->uri.path);
if (len >= 33 && id[len-33] == '/') {
id += len - 32;
pathinfo = 1;
} else {
return HANDLER_GO_ON;
}
}
/* the request has to contain a 32byte ID */
for (len = 0; light_isxdigit(id[len]); ++len) ;
if (len != 32) {
if (!pathinfo) { /*(reduce false positive noise in error log)*/
log_error(r->conf.errh, __FILE__, __LINE__,
"invalid progress-id; non-xdigit or len != 32: %s", id);
}
return HANDLER_GO_ON;
}
/* check if this is a POST request */
switch(r->http_method) {
case HTTP_METHOD_POST:
request_map_insert(&p->request_map, r, id, len);
return HANDLER_GO_ON;
case HTTP_METHOD_GET:
buffer_reset(&r->physical.path);
r->resp_body_started = 1;
r->resp_body_finished = 1;
r->http_status = 200;
r->handler_module = NULL;
/* get the connection */
if (NULL == (post_r = request_map_get_request(&p->request_map, id, len))) {
log_error(r->conf.errh, __FILE__, __LINE__, "ID not known: %s", id);
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_OTHER, CONST_STR_LEN("Pragma"), CONST_STR_LEN("no-cache"));
http_header_response_set(r, HTTP_HEADER_OTHER, 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 */
b = r->tmp_buf;
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_mem(r->write_queue, CONST_BUF_LEN(b));
return HANDLER_FINISHED;
default:
break;
}
return HANDLER_GO_ON;
}
REQUESTDONE_FUNC(mod_uploadprogress_request_done) {
plugin_data *p = p_d;
if (r->http_method != HTTP_METHOD_POST) return HANDLER_GO_ON;
if (buffer_string_is_empty(&r->uri.path)) return HANDLER_GO_ON;
if (request_map_remove_request(&p->request_map, r)) {
/* removed */
}
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;
}