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ngx_http_uploadprogress_module.c
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/*
* Copyright (C) 2007 Brice Figureau
* shm_zone and rbtree code Copyright (c) 2002-2007 Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#define TIMER_FREQUENCY 15 * 1000
typedef enum {
uploadprogress_state_starting = 0,
uploadprogress_state_error = 1,
uploadprogress_state_done = 2,
uploadprogress_state_uploading = 3,
uploadprogress_state_none
} ngx_http_uploadprogress_state_t;
typedef struct {
ngx_str_t name;
ngx_http_uploadprogress_state_t idx;
} ngx_http_uploadprogress_state_map_t;
typedef struct ngx_http_uploadprogress_node_s ngx_http_uploadprogress_node_t;
struct ngx_http_uploadprogress_node_s {
ngx_rbtree_node_t node;
ngx_uint_t err_status;
off_t rest;
off_t length;
ngx_uint_t done;
ngx_uint_t sequence;
ngx_uint_t sent_portion;
time_t timeout;
struct ngx_http_uploadprogress_node_s *prev;
struct ngx_http_uploadprogress_node_s *next;
u_char len;
u_char data[1];
};
typedef struct {
ngx_shm_zone_t *shm_zone;
ngx_rbtree_node_t *node;
ngx_http_request_t *r;
time_t timeout;
} ngx_http_uploadprogress_cleanup_t;
typedef struct {
ngx_rbtree_t *rbtree;
ngx_http_uploadprogress_node_t list_head;
ngx_http_uploadprogress_node_t list_tail;
} ngx_http_uploadprogress_ctx_t;
typedef struct {
ngx_array_t *values;
ngx_array_t *lengths;
} ngx_http_uploadprogress_template_t;
typedef struct {
ngx_shm_zone_t *shm_zone;
time_t timeout;
ngx_event_t cleanup;
ngx_http_handler_pt handler;
u_char track;
ngx_str_t content_type;
ngx_array_t templates;
ngx_str_t header;
ngx_str_t header_mul;
ngx_addr_t progress_server;
int udp_socket;
ngx_str_t jsonp_parameter;
ngx_int_t json_multiple:1;
} ngx_http_uploadprogress_conf_t;
typedef struct {
ngx_http_event_handler_pt read_event_handler;
} ngx_http_uploadprogress_module_ctx_t;
static ngx_int_t ngx_http_reportuploads_handler(ngx_http_request_t *r);
static void ngx_http_uploadprogress_cleanup(void *data);
static char *ngx_http_report_uploads(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static ngx_int_t ngx_http_uploadprogress_init_zone(ngx_shm_zone_t * shm_zone, void *data);
static ngx_int_t ngx_http_uploadprogress_init(ngx_conf_t * cf);
static void *ngx_http_uploadprogress_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_uploadprogress_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
static ngx_int_t ngx_http_uploadprogress_init_variables_and_templates(ngx_conf_t *cf);
static ngx_int_t ngx_http_uploadprogress_received_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_uploadprogress_offset_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_uploadprogress_status_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_uploadprogress_id_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_uploadprogress_callback_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static char* ngx_http_upload_progress_set_template(ngx_conf_t * cf, ngx_http_uploadprogress_template_t *t, ngx_str_t *source);
static char *ngx_http_track_uploads(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char *ngx_http_report_uploads(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char *ngx_http_upload_progress(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_template(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_java_output(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_json_output(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_jsonp_output(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_json_multiple_output(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static char* ngx_http_upload_progress_jsonp_multiple_output(ngx_conf_t * cf, ngx_command_t * cmd, void *conf);
static void ngx_clean_old_connections(ngx_event_t * ev);
static ngx_int_t ngx_http_uploadprogress_content_handler(ngx_http_request_t *r);
static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
static ngx_command_t ngx_http_uploadprogress_commands[] = {
{ngx_string("upload_progress"),
NGX_HTTP_MAIN_CONF | NGX_CONF_TAKE2,
ngx_http_upload_progress,
0,
0,
NULL},
{ngx_string("track_uploads"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE2 | NGX_CONF_TAKE3,
ngx_http_track_uploads,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("report_uploads"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1,
ngx_http_report_uploads,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_content_type"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_uploadprogress_conf_t, content_type),
NULL},
{ngx_string("upload_progress_template"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE2,
ngx_http_upload_progress_template,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_uploadprogress_conf_t, templates),
NULL},
{ngx_string("upload_progress_java_output"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS,
ngx_http_upload_progress_java_output,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_json_output"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS,
ngx_http_upload_progress_json_output,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_jsonp_output"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS,
ngx_http_upload_progress_jsonp_output,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_json_multiple_output"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS,
ngx_http_upload_progress_json_multiple_output,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_jsonp_multiple_output"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_NOARGS,
ngx_http_upload_progress_jsonp_multiple_output,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
{ngx_string("upload_progress_header"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_uploadprogress_conf_t, header),
NULL},
{ngx_string("upload_progress_header_mul"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_uploadprogress_conf_t, header_mul),
NULL},
{ngx_string("upload_progress_jsonp_parameter"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_uploadprogress_conf_t, jsonp_parameter),
NULL},
ngx_null_command
};
static ngx_http_variable_t ngx_http_uploadprogress_variables[] = {
{ ngx_string("uploadprogress_received"), NULL, ngx_http_uploadprogress_received_variable,
(uintptr_t) offsetof(ngx_http_uploadprogress_node_t, rest),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("uploadprogress_remaining"), NULL, ngx_http_uploadprogress_offset_variable,
(uintptr_t) offsetof(ngx_http_uploadprogress_node_t, rest),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("uploadprogress_length"), NULL, ngx_http_uploadprogress_offset_variable,
(uintptr_t) offsetof(ngx_http_uploadprogress_node_t, length),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("uploadprogress_status"), NULL, ngx_http_uploadprogress_status_variable,
(uintptr_t) offsetof(ngx_http_uploadprogress_node_t, err_status),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("uploadprogress_id"), NULL, ngx_http_uploadprogress_id_variable,
(uintptr_t) offsetof(ngx_http_uploadprogress_node_t, err_status),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("uploadprogress_callback"), NULL, ngx_http_uploadprogress_callback_variable,
(uintptr_t) NULL,
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};
static ngx_http_module_t ngx_http_uploadprogress_module_ctx = {
ngx_http_uploadprogress_init_variables_and_templates, /* preconfiguration */
ngx_http_uploadprogress_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_uploadprogress_create_loc_conf, /* create location configuration */
ngx_http_uploadprogress_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_uploadprogress_module = {
NGX_MODULE_V1,
&ngx_http_uploadprogress_module_ctx, /* module context */
ngx_http_uploadprogress_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_http_uploadprogress_state_map_t ngx_http_uploadprogress_state_map[] = {
{ngx_string("starting"), uploadprogress_state_starting},
{ngx_string("error"), uploadprogress_state_error},
{ngx_string("done"), uploadprogress_state_done},
{ngx_string("uploading"), uploadprogress_state_uploading},
{ngx_null_string, uploadprogress_state_none},
};
static ngx_str_t ngx_http_uploadprogress_java_defaults[] = {
ngx_string("new Object({ 'state' : 'starting' })\r\n"),
ngx_string("new Object({ 'state' : 'error', 'status' : $uploadprogress_status })\r\n"),
ngx_string("new Object({ 'state' : 'done' })\r\n"),
ngx_string("new Object({ 'state' : 'uploading', 'received' : $uploadprogress_received, 'size' : $uploadprogress_length })\r\n")
};
static ngx_str_t ngx_http_uploadprogress_json_defaults[] = {
ngx_string("{ \"state\" : \"starting\" }\r\n"),
ngx_string("{ \"state\" : \"error\", \"status\" : $uploadprogress_status }\r\n"),
ngx_string("{ \"state\" : \"done\" }\r\n"),
ngx_string("{ \"state\" : \"uploading\", \"received\" : $uploadprogress_received, \"size\" : $uploadprogress_length }\r\n")
};
static ngx_str_t ngx_http_uploadprogress_jsonp_defaults[] = {
ngx_string("$uploadprogress_callback({ \"state\" : \"starting\" });\r\n"),
ngx_string("$uploadprogress_callback({ \"state\" : \"error\", \"status\" : $uploadprogress_status });\r\n"),
ngx_string("$uploadprogress_callback({ \"state\" : \"done\" });\r\n"),
ngx_string("$uploadprogress_callback({ \"state\" : \"uploading\", \"received\" : $uploadprogress_received, \"size\" : $uploadprogress_length });\r\n")
};
static ngx_str_t ngx_http_uploadprogress_json_multiple_defaults[] = {
ngx_string("{ \"id\" : $uploadprogress_id, \"state\" : \"starting\" }"),
ngx_string("{ \"id\" : $uploadprogress_id, \"state\" : \"error\", \"status\" : $uploadprogress_status }"),
ngx_string("{ \"id\" : $uploadprogress_id, \"state\" : \"done\" }"),
ngx_string("{ \"id\" : $uploadprogress_id, \"state\" : \"uploading\", \"received\" : $uploadprogress_received, \"size\" : $uploadprogress_length }")
};
static ngx_str_t ngx_http_uploadprogress_jsonp_multiple_defaults[] = {
ngx_string("$uploadprogress_callback({ \"id\" : $uploadprogress_id, \"state\" : \"starting\" });\r\n"),
ngx_string("$uploadprogress_callback({ \"id\" : $uploadprogress_id, \"state\" : \"error\", \"status\" : $uploadprogress_status });\r\n"),
ngx_string("$uploadprogress_callback({ \"id\" : $uploadprogress_id, \"state\" : \"done\" });\r\n"),
ngx_string("$uploadprogress_callback({ \"id\" : $uploadprogress_id, \"state\" : \"uploading\", \"received\" : $uploadprogress_received, \"size\" : $uploadprogress_length });\r\n")
};
static ngx_array_t ngx_http_uploadprogress_global_templates;
static ngx_str_t*
get_tracking_id(ngx_http_request_t * r)
{
u_char *p, *start_p;
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *header;
ngx_str_t *ret, args;
ngx_http_uploadprogress_conf_t *upcf;
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "upload-progress: get_tracking_id");
part = &r->headers_in.headers.part;
header = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].key.len == upcf->header.len
&& ngx_strncasecmp(header[i].key.data, upcf->header.data,
header[i].key.len) == 0) {
ret = ngx_calloc(sizeof(ngx_str_t), r->connection->log );
ret->data = header[i].value.data;
ret->len = header[i].value.len;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id found header: %V", ret);
return ret;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id no header found");
/* not found, check as a request arg */
/* it is possible the request args have not been yet created (or already released) */
/* so let's try harder first from the request line */
args.len = r->args.len;
args.data = r->args.data;
if (args.len && args.data) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id no header found, args found");
i = 0;
p = args.data;
do {
ngx_uint_t len = args.len - (p - args.data);
if (len >= (upcf->header.len + 1) && ngx_strncasecmp(p, upcf->header.data, upcf->header.len) == 0
&& p[upcf->header.len] == '=') {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id found args: %s",p);
i = 1;
break;
}
else if (!len)
break;
}
while(p++);
if (i) {
start_p = p += upcf->header.len + 1;
while (p < args.data + args.len) {
if (*((p++) + 1) == '&') {
break;
}
}
ret = ngx_calloc(sizeof(ngx_str_t), r->connection->log);
ret->data = start_p;
ret->len = p - start_p;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id found args: %V",ret);
return ret;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id no id found");
return NULL;
}
static ngx_str_t*
get_tracking_ids_mul(ngx_http_request_t * r)
{
u_char *p, *start_p;
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *header;
ngx_str_t *ret, args;
ngx_http_uploadprogress_conf_t *upcf;
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "upload-progress: get_tracking_ids");
part = &r->headers_in.headers.part;
header = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].key.len == upcf->header_mul.len
&& ngx_strncasecmp(header[i].key.data, upcf->header_mul.data,
header[i].key.len) == 0) {
ret = ngx_calloc(sizeof(ngx_str_t), r->connection->log );
ret->data = header[i].value.data;
ret->len = header[i].value.len;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_ids found header: %V", ret);
return ret;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_ids no header found");
/* not found, check as a request arg */
/* it is possible the request args have not been yet created (or already released) */
/* so let's try harder first from the request line */
args.len = r->args.len;
args.data = r->args.data;
if (args.len && args.data) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id no header found, args found");
i = 0;
p = args.data;
do {
ngx_uint_t len = args.len - (p - args.data);
if (len >= (upcf->header_mul.len + 1) && ngx_strncasecmp(p, upcf->header_mul.data, upcf->header_mul.len) == 0
&& p[upcf->header_mul.len] == '=') {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id found args: %s",p);
i = 1;
break;
}
else if (!len)
break;
}
while(p++);
if (i) {
start_p = p += upcf->header_mul.len + 1;
while (p < args.data + args.len) {
if (*((p++) + 1) == '&') {
break;
}
}
ret = ngx_calloc(sizeof(ngx_str_t), r->connection->log);
ret->data = start_p;
ret->len = p - start_p;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id found args: %V",ret);
return ret;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: get_tracking_id no id found");
return NULL;
}
static ngx_http_uploadprogress_node_t *
find_node(ngx_str_t * id, ngx_http_uploadprogress_ctx_t * ctx, ngx_log_t * log)
{
uint32_t hash;
ngx_rbtree_node_t *node, *sentinel;
ngx_int_t rc;
ngx_http_uploadprogress_node_t *up;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "upload-progress: find_node %V", id);
hash = ngx_crc32_short(id->data, id->len);
node = ctx->rbtree->root;
sentinel = ctx->rbtree->sentinel;
while (node != sentinel) {
if (hash != node->key) {
node = (hash < node->key) ? node->left : node->right;
continue;
}
/* hash == node->key */
up = (ngx_http_uploadprogress_node_t *) node;
rc = ngx_memn2cmp(id->data, up->data, id->len, up->len);
/* found a key with unmatching hash (and value), let's keep comparing hashes then */
if (rc < 0) {
node = node->left;
continue;
}
if (rc > 0) {
node = node->right;
continue;
}
/* found the hash */
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "upload-progress: found node");
return up;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "upload-progress: can't find node");
return NULL;
}
static void ngx_http_uploadprogress_event_handler(ngx_http_request_t *r);
static ngx_int_t
ngx_http_uploadprogress_content_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_http_uploadprogress_module_ctx_t *ctx;
ngx_http_uploadprogress_conf_t *upcf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "upload-progress: ngx_http_uploadprogress_content_handler");
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
/* call the original request handler */
rc = upcf->handler(r);
/* bail out if error */
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
/* request is OK, hijack the read_event_handler if the request has to be tracked*/
ctx = ngx_http_get_module_ctx(r, ngx_http_uploadprogress_module);
if (ctx != NULL) {
ctx->read_event_handler = r->read_event_handler;
r->read_event_handler = ngx_http_uploadprogress_event_handler;
}
return rc;
}
static ngx_str_t* ngx_http_uploadprogress_strdup(ngx_str_t *src, ngx_log_t * log)
{
ngx_str_t *dst;
dst = ngx_alloc(src->len + sizeof(ngx_str_t), log);
if (dst == NULL) {
return NULL;
}
dst->len = src->len;
ngx_memcpy(((char*)dst + sizeof(ngx_str_t)) , src->data, src->len);
dst->data = ((u_char*)dst + sizeof(ngx_str_t));
return dst;
}
static void ngx_http_uploadprogress_strdupfree(ngx_str_t *str)
{
ngx_free(str);
}
static void ngx_http_uploadprogress_event_handler(ngx_http_request_t *r)
{
ngx_str_t *id, *oldid;
ngx_slab_pool_t *shpool;
ngx_shm_zone_t *shm_zone;
ngx_http_request_body_t *rb;
ngx_http_uploadprogress_ctx_t *ctx;
ngx_http_uploadprogress_node_t *up;
ngx_http_uploadprogress_conf_t *upcf;
ngx_http_uploadprogress_module_ctx_t *module_ctx;
size_t size;
off_t rest;
rb = r->request_body;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "upload-progress: ngx_http_uploadprogress_event_handler");
/* find node, update rest */
oldid = id = get_tracking_id(r);
if (id == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"upload-progress: read_event_handler cant find id");
return;
}
/* perform a deep copy of id */
id = ngx_http_uploadprogress_strdup(id, r->connection->log);
ngx_free(oldid);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload-progress: read_event_handler found id: %V", id);
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
shm_zone = upcf->shm_zone;
/* call the original read event handler */
module_ctx = ngx_http_get_module_ctx(r, ngx_http_uploadprogress_module);
if (module_ctx != NULL ) {
module_ctx->read_event_handler(r);
}
/* at this stage, r is not anymore safe to use */
/* the request could have been closed/freed behind our back */
/* and thats the same issue with any other material that was allocated in the request pool */
/* that's why we duplicate id afterward */
/* it's also possible that the id was null if we got a spurious (like abort) read */
/* event. In this case we still have called the original read event handler */
/* but we have to bail out, because we won't ever be able to find our upload node */
if (shm_zone == NULL) {
ngx_http_uploadprogress_strdupfree(id);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"upload-progress: read_event_handler no shm_zone for id: %V", id);
return;
}
ctx = shm_zone->data;
/* get the original connection of the upload */
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
up = find_node(id, ctx, ngx_cycle->log);
if (up != NULL && !up->done) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"upload-progress: read_event_handler found node: %V", id);
#if (NGX_HTTP_V2)
if (r->http_connection->addr_conf->http2) { /* http/2 */
up->rest = up->length - r->request_length;
} else { /* http/1 */
#endif
rest = rb->rest;
size = rb->buf->last - rb->buf->pos;
if ((off_t) size < rest) {
rest -= size;
} else {
rest = 0;
}
up->rest = rest;
#if (NGX_HTTP_V2)
}
#endif
if(up->length == 0)
up->length = r->headers_in.content_length_n;
if(upcf->udp_socket != -1 && upcf->progress_server.socklen != 0)
{
u_char datagram_buf[1024];
u_char * end;
off_t uploaded;
ngx_uint_t portion;
uploaded = up->length - up->rest;
if(up->length)
portion = 100 * uploaded / up->length;
else
portion = 100;
if(portion > up->sent_portion)
{
end = ngx_snprintf(datagram_buf, sizeof(datagram_buf), "{\"id\" : \"%V\", \"sequence\" : %d, \"size\" : %uO, \"uploaded\" : %uO }",
id, up->sequence, up->length, uploaded);
sendto(upcf->udp_socket, datagram_buf, end - datagram_buf, 0, (struct sockaddr*)upcf->progress_server.sockaddr, upcf->progress_server.socklen);
up->sent_portion = portion;
++up->sequence;
}
}
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"upload-progress: read_event_handler storing rest %uO/%uO for %V", up->rest, up->length, id);
} else {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"upload-progress: read_event_handler not found: %V", id);
}
ngx_shmtx_unlock(&shpool->mutex);
ngx_http_uploadprogress_strdupfree(id);
}
/* This generates the response for the report */
static ngx_int_t
ngx_http_reportuploads_handler(ngx_http_request_t * r)
{
ngx_str_t *id, response;
ngx_buf_t *b;
ngx_chain_t out;
ngx_int_t rc, found=0, done=0, err_status=0;
off_t rest=0, length=0;
ngx_uint_t len;
ngx_slab_pool_t *shpool;
ngx_http_uploadprogress_conf_t *upcf;
ngx_http_uploadprogress_ctx_t *ctx;
ngx_http_uploadprogress_node_t *up;
ngx_table_elt_t *expires, *cc;
ngx_http_uploadprogress_state_t state;
ngx_http_uploadprogress_template_t *t;
if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
return NGX_HTTP_NOT_ALLOWED;
}
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
/* get the tracking id if any */
if(upcf->json_multiple)
id = get_tracking_ids_mul(r);
else
id = get_tracking_id(r);
if (id == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads handler cant find id");
return NGX_DECLINED;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads handler found id: %V", id);
if (upcf->shm_zone == NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads no shm_zone for id: %V", id);
ngx_free(id);
return NGX_DECLINED;
}
/* force no-cache */
expires = r->headers_out.expires;
if (expires == NULL) {
expires = ngx_list_push(&r->headers_out.headers);
if (expires == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.expires = expires;
expires->next = NULL;
expires->hash = 1;
expires->key.len = sizeof("Expires") - 1;
expires->key.data = (u_char *) "Expires";
}
len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT");
expires->value.len = len - 1;
cc = r->headers_out.cache_control;
if (cc == NULL) {
cc = ngx_list_push(&r->headers_out.headers);
if (cc == NULL) {
expires->hash = 0;
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.cache_control = cc;
cc->next = NULL;
cc->hash = 1;
cc->key.len = sizeof("Cache-Control") - 1;
cc->key.data = (u_char *) "Cache-Control";
} else {
for (cc = cc->next; cc; cc = cc->next) {
cc->hash = 0;
}
cc = r->headers_out.cache_control;
cc->next = NULL;
}
expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT";
cc->value.len = sizeof("no-cache") - 1;
cc->value.data = (u_char *) "no-cache";
if (r->method == NGX_HTTP_HEAD) {
r->headers_out.status = NGX_HTTP_OK;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
}
ctx = upcf->shm_zone->data;
/* get the original connection of the upload */
shpool = (ngx_slab_pool_t *) upcf->shm_zone->shm.addr;
if(upcf->json_multiple)
{
ngx_chain_t * p_chain_end = 0;
ngx_chain_t * p_chain_start = 0;
size_t offs = 0;
u_char * p1 = id->data, * p2;
r->headers_out.content_length_n = 0;
while(offs < id->len)
{
p2 = memchr((char *)id->data + offs, ';', id->len - offs);
if(!p2) p2 = id->data + id->len;
size_t len = p2 - p1;
if(len)
{
ngx_str_t sub_id;
sub_id.data = p1;
sub_id.len = len;
// ---->
ngx_shmtx_lock(&shpool->mutex);
up = find_node(&sub_id, ctx, r->connection->log);
if (up != NULL) {
ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads found node: %V (rest: %uO, length: %uO, done: %ui, err_status: %ui)", &sub_id, up->rest, up->length, up->done, up->err_status);
rest = up->rest;
length = up->length;
done = up->done;
err_status = up->err_status;
found = 1;
} else {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads not found: %V", &sub_id);
}
ngx_shmtx_unlock(&shpool->mutex);
/* send the output */
r->headers_out.content_type = upcf->content_type;
if(up == NULL)
{
// For current id
ngx_http_uploadprogress_node_t * tmp_node = ngx_pcalloc(r->pool, sizeof(ngx_http_uploadprogress_node_t) + sub_id.len);
tmp_node->len = sub_id.len;
ngx_memcpy(tmp_node->data, sub_id.data, sub_id.len);
ngx_http_set_ctx(r, tmp_node, ngx_http_uploadprogress_module);
}
else
ngx_http_set_ctx(r, up, ngx_http_uploadprogress_module);
if (!found) {
state = uploadprogress_state_starting;
} else if (err_status >= NGX_HTTP_BAD_REQUEST) {
state = uploadprogress_state_error;
} else if (done) {
state = uploadprogress_state_done;
} else if ( length == 0 && rest == 0 ) {
state = uploadprogress_state_starting;
} else {
state = uploadprogress_state_uploading;
}
t = upcf->templates.elts;
if (ngx_http_script_run(r, &response, t[(ngx_uint_t)state].lengths->elts, 0,
t[(ngx_uint_t)state].values->elts) == NULL)
{
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"upload progress: state=%d, err_status=%ui, remaining=%uO, length=%uO",
state, err_status, (length - rest), length);
if(p_chain_end)
{
p_chain_end->next = ngx_palloc(r->pool, sizeof(ngx_chain_t));
if (p_chain_end->next == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
p_chain_end = p_chain_end->next;
// Insert comma
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->pos = b->start = ngx_palloc(r->pool, 2);
if (b->pos == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->last = b->end = b->pos + 2;
ngx_memcpy(b->pos, ", ", 2);
b->temporary = 1;
b->memory = 1;
p_chain_end->buf = b;
p_chain_end->next = ngx_palloc(r->pool, sizeof(ngx_chain_t));
if (p_chain_end->next == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
p_chain_end = p_chain_end->next;
}
else
{
p_chain_start = p_chain_end = ngx_palloc(r->pool, sizeof(ngx_chain_t));
}
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->pos = b->start = response.data;
b->last = b->end = response.data + response.len;
b->temporary = 1;
b->memory = 1;
p_chain_end->buf = b;
p_chain_end->next = NULL;
// ---->
r->headers_out.content_length_n += b->last - b->pos;
p1 = p2 + 1;
}
offs += len + 1;
}
ngx_free(id);
if(!p_chain_end) // Malformed id
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"reportuploads malformed multiple id");
return NGX_DECLINED;
}
// Prepend brace
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->pos = b->start = ngx_palloc(r->pool, 2);
if (b->pos == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->last = b->end = b->pos + 2;
ngx_memcpy(b->pos, "[ ", 2);
b->temporary = 1;
b->memory = 1;
r->headers_out.content_length_n += 2;
out.buf = b;
out.next = p_chain_start;