forked from masterzen/nginx-upload-progress-module
/
ngx_http_uploadprogress_module.c
1738 lines (1356 loc) · 54.9 KB
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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;
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 jsonp_parameter;
} 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_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_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 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_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_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_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_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_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_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;
}
if (len<=0)
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_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 = node->left;
continue;
}
if (hash > node->key) {
node = node->right;
continue;
}
/* hash == node->key */
do {
up = (ngx_http_uploadprogress_node_t *) node;
rc = ngx_memn2cmp(id->data, up->data, id->len, (size_t) up->len);
if (rc == 0) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0,
"upload-progress: found node");
return up;
}
node = (rc < 0) ? node->left : node->right;
} while (node != sentinel && hash == node->key);
/* found a key with unmatching hash (and value), let's keep comparing hashes then */
}
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_connection_t *c;
ngx_shm_zone_t *shm_zone;
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;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "upload-progress: ngx_http_uploadprogress_event_handler");
c = r->connection;
/* 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);
up->rest = r->request_body->rest;
if(up->length == 0)
up->length = r->headers_in.content_length_n;
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, i;
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, **ccp;
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;
}
/* get the tracking id if any */
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);
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
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;
}
ctx = upcf->shm_zone->data;
/* get the original connection of the upload */
shpool = (ngx_slab_pool_t *) upcf->shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
up = find_node(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)", 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", id);
}
ngx_shmtx_unlock(&shpool->mutex);
ngx_free(id);
/* send the output */
r->headers_out.content_type = upcf->content_type;
/* 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->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;
ccp = r->headers_out.cache_control.elts;
if (ccp == NULL) {
if (ngx_array_init(&r->headers_out.cache_control, r->pool,
1, sizeof(ngx_table_elt_t *))
!= NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ccp = ngx_array_push(&r->headers_out.cache_control);
if (ccp == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cc = ngx_list_push(&r->headers_out.headers);
if (cc == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cc->hash = 1;
cc->key.len = sizeof("Cache-Control") - 1;
cc->key.data = (u_char *) "Cache-Control";
*ccp = cc;
} else {
for (i = 1; i < r->headers_out.cache_control.nelts; i++) {
ccp[i]->hash = 0;
}
cc = ccp[0];
}
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;
}
}
ngx_http_set_ctx(r, up, ngx_http_uploadprogress_module);
/*
There are 4 possibilities
* request not yet started: found = false
* request in error: err_status >= NGX_HTTP_SPECIAL_RESPONSE
* request finished: done = true
* request not yet started but registered: length==0 && rest ==0
* reauest in progress: rest > 0
*/
if (!found) {
state = uploadprogress_state_starting;
} else if (err_status >= NGX_HTTP_SPECIAL_RESPONSE) {
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)
{
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);
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
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;
out.buf = b;
out.next = NULL;
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = b->last - b->pos;
b->last_buf = 1;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
return ngx_http_output_filter(r, &out);
}
/*
Let's register the upload connection in our connections rb-tree
*/
static ngx_int_t
ngx_http_uploadprogress_handler(ngx_http_request_t * r)
{
size_t n;
ngx_str_t *id;
uint32_t hash;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_http_uploadprogress_conf_t *upcf;
ngx_http_uploadprogress_ctx_t *ctx;
ngx_http_uploadprogress_node_t *up;
ngx_http_uploadprogress_cleanup_t *upcln;
ngx_pool_cleanup_t *cln;
/* Is it a POST connection */
if (r->method != NGX_HTTP_POST) {
return NGX_DECLINED;
}
id = get_tracking_id(r);
if (id == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads no id found in POST upload req");
return NGX_DECLINED;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads id found: %V", id);
upcf = ngx_http_get_module_loc_conf(r, ngx_http_uploadprogress_module);
if (!upcf->track) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads not tracking in this location for id: %V", id);
ngx_free(id);
return NGX_DECLINED;
}
if (upcf->shm_zone == NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads no shm_zone for id: %V", id);
ngx_free(id);
return NGX_DECLINED;
}
ctx = upcf->shm_zone->data;
hash = ngx_crc32_short(id->data, id->len);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads hash %08XD for id: %V", hash, id);
shpool = (ngx_slab_pool_t *) upcf->shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
if (find_node(id, ctx, r->connection->log) != NULL) {
ngx_shmtx_unlock(&shpool->mutex);
/* already found a node with matching progress ID */
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
"upload_progress: tracking already registered id: %V", id);
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_uploadprogress_cleanup_t));
if (cln == NULL) {
ngx_shmtx_unlock(&shpool->mutex);
ngx_free(id);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
n = sizeof(ngx_http_uploadprogress_node_t)
+ id->len;
node = ngx_slab_alloc_locked(shpool, n);
if (node == NULL) {
ngx_shmtx_unlock(&shpool->mutex);
ngx_free(id);
return NGX_HTTP_SERVICE_UNAVAILABLE;
}
up = (ngx_http_uploadprogress_node_t *) node;
node->key = hash;
up->len = (u_char) id->len;
up->err_status = r->err_status;
up->done = 0;
up->rest = 0;
up->length = 0;
up->timeout = 0;
up->next = ctx->list_head.next;
up->next->prev = up;
up->prev = &ctx->list_head;
ctx->list_head.next = up;
ngx_memcpy(up->data, id->data, id->len);
ngx_rbtree_insert(ctx->rbtree, node);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"trackuploads: %08XD inserted in rbtree", node->key);
if (!upcf->cleanup.timer_set) {
upcf->cleanup.data = upcf->shm_zone;
upcf->cleanup.handler = ngx_clean_old_connections;
upcf->cleanup.log = upcf->shm_zone->shm.log;
ngx_add_timer(&upcf->cleanup, TIMER_FREQUENCY);
}
ngx_shmtx_unlock(&shpool->mutex);
cln->handler = ngx_http_uploadprogress_cleanup;
upcln = cln->data;
upcln->shm_zone = upcf->shm_zone;
upcln->node = node;
upcln->timeout = upcf->timeout;
upcln->r = r;
ngx_free(id);
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_uploadprogress_module_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_uploadprogress_module);
/* finally says to the core we don't handle anything */
return NGX_DECLINED;
}
static void
ngx_http_uploadprogress_rbtree_insert_value(ngx_rbtree_node_t * temp,
ngx_rbtree_node_t * node,
ngx_rbtree_node_t * sentinel)
{
ngx_http_uploadprogress_node_t *upn, *upnt;
for (;;) {
if (node->key < temp->key) {
if (temp->left == sentinel) {
temp->left = node;
break;
}
temp = temp->left;
} else if (node->key > temp->key) {
if (temp->right == sentinel) {
temp->right = node;
break;
}
temp = temp->right;
} else { /* node->key == temp->key */
upn = (ngx_http_uploadprogress_node_t *) node;
upnt = (ngx_http_uploadprogress_node_t *) temp;
if (ngx_memn2cmp(upn->data, upnt->data, upn->len, upnt->len) < 0) {
if (temp->left == sentinel) {
temp->left = node;
break;
}
temp = temp->left;
} else {
if (temp->right == sentinel) {
temp->right = node;
break;
}
temp = temp->right;
}
}
}
node->parent = temp;
node->left = sentinel;
node->right = sentinel;
ngx_rbt_red(node);
}
static void
ngx_clean_old_connections(ngx_event_t * ev)
{
ngx_shm_zone_t *shm_zone;
ngx_http_uploadprogress_ctx_t *ctx;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_http_uploadprogress_node_t *up, *upprev;
time_t now = ngx_time();
int count = 0;
/* scan the rbtree */
shm_zone = ev->data;
ctx = shm_zone->data;
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean old connections at %T", now);
ngx_shmtx_lock(&shpool->mutex);
node = (ngx_rbtree_node_t *) ctx->list_tail.prev;
for (;;) {
if (node == &ctx->list_head.node) {
break;
}
up = (ngx_http_uploadprogress_node_t *) node;
upprev = up->prev;
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean: scanning %08XD (req done %ui) timeout at %T",
node->key, up->done, up->timeout);
if ( (up->done && up->timeout < now) || (ngx_quit || ngx_terminate || ngx_exiting) ) {
up->next->prev = up->prev;
up->prev->next = up->next;
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean: removing %08XD (req %ui) ",
node->key, up->done, up->timeout);
ngx_rbtree_delete(ctx->rbtree, node);
ngx_slab_free_locked(shpool, node);
}
else
count++;
node = (ngx_rbtree_node_t *) upprev;
}
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean old connections: quit: %ui term: %ui count: %ui", ngx_quit, ngx_terminate, count);
/* don't reschedule timer if ngx_quit or ngx_terminate && nodes emtpy */
if ( count > 0 || !(ngx_quit || ngx_terminate || ngx_exiting)) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean old connections restarting timer");
ngx_add_timer(ev, TIMER_FREQUENCY); /* trigger again in 60s */
} else if (ngx_quit || ngx_terminate || ngx_exiting) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, shm_zone->shm.log, 0,
"uploadprogress clean old connections quitting , no more active connections: not restarting timer");
}
ngx_shmtx_unlock(&shpool->mutex);
}