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statsgw.cpp
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/*
* statsgw.cpp
* HTTP server for showing some DL stats via SwarmPlayer 3000's webUI,
* libevent based
*
* Created by Victor Grishchenko, Arno Bakker
* Copyright 2010-2012 TECHNISCHE UNIVERSITEIT DELFT. All rights reserved.
*
*/
#include "swift.h"
#include <event2/http.h>
using namespace swift;
int statsgw_reqs_count = 0;
uint64_t statsgw_last_down;
uint64_t statsgw_last_up;
tint statsgw_last_time = 0;
bool statsgw_quit_process=false;
struct evhttp *statsgw_event;
struct evhttp_bound_socket *statsgw_handle;
const char *top_page = "<!doctype html> \
<html style=\"font-family:Verdana,Arial,Helvetica,sans-serif;font-size:14px;background-color:white;\"> \
<head> \
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" /> \
<meta http-equiv=\"cache-control\" content=\"Private\" /> \
<meta http-equiv=\"Refresh\" content=\"2;url=http://127.0.0.1:6876/webUI\" /> \
<title>Swift Web Interface</title> \
</head> \
<body style=\"font-family:Verdana,Arial,Helvetica,sans-serif;font-size:14px;background-color:white;padding:20px; margin:20px;\"> \
<div style=\"padding:40;\"> \
<div style=\"width:400; float:left; padding:20px\"> \
<h1 style=\"font-size: 20px;\"> Swift swarms: </h1>";
const char *swarm_page_templ = " \
<h2 style=\"font-size: 18px; padding-top: 10px; padding-left: 20px; margin-bottom: 0px; color:#30bf00;\">Root hash: %s</h2> \
<ul style=\"padding-left: 40px;\"> \
<li>Progress: %d%c \
<li>Download speed: %d KB/s \
<li>Upload speed: %d KB/s \
</ul>";
const char *bottom_page = " \
<button style=\"color:white; background-color:#4f84dc; width:80;height:50; font-size:18px; font-weight:bold; text-shadow: #6374AB 2px 2px 2px;\" \
onClick=\"window.location='http://127.0.0.1:6876/webUI/exit';\">Quit Swift</button> \
</div> \
</div> \
</body> \
</html>";
const char *exit_page = "<!doctype html> \
<html style=\"font-family:Verdana,Arial,Helvetica,sans-serif;font-size:14px;background-color:white;\"> \
<head> \
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" /> \
<meta http-equiv=\"cache-control\" content=\"Private\" /> \
<title>Swift Web Interface</title> \
</head> \
<body style=\"font-family:Verdana,Arial,Helvetica,sans-serif;font-size:14px;background-color:white;padding:20px; margin:20px;\"> \
<div style=\"padding:40;\"> \
<div style=\"width:400; float:left; padding:20px\"> \
<h1 style=\"font-size: 20px;\"> Swift is no longer running. </h1> \
</div> \
</div> \
</body> \
</html>";
static void StatsGwNewRequestCallback(struct evhttp_request *evreq, void *arg);
void StatsExitCallback(struct evhttp_request *evreq)
{
char contlenstr[1024];
sprintf(contlenstr,PRISIZET,strlen(exit_page));
struct evkeyvalq *headers = evhttp_request_get_output_headers(evreq);
evhttp_add_header(headers, "Connection", "close");
evhttp_add_header(headers, "Content-Type", "text/html");
evhttp_add_header(headers, "Content-Length", contlenstr);
evhttp_add_header(headers, "Accept-Ranges", "none");
// Construct evbuffer and send via chunked encoding
struct evbuffer *evb = evbuffer_new();
int ret = evbuffer_add(evb,exit_page,strlen(exit_page));
if (ret < 0) {
print_error("statsgw: ExitCallback: error evbuffer_add");
return;
}
evhttp_send_reply(evreq, 200, "OK", evb);
evbuffer_free(evb);
}
bool StatsQuit()
{
return statsgw_quit_process;
}
void StatsOverviewCallback(struct evhttp_request *evreq)
{
tint nu = NOW;
uint64_t down = Channel::global_raw_bytes_down;
uint64_t up = Channel::global_raw_bytes_up;
int dspeed = 0, uspeed = 0;
tint tdiff = (nu - statsgw_last_time)/1000000;
if (tdiff > 0) {
dspeed = (int)(((down-statsgw_last_down)/1024) / tdiff);
uspeed = (int)(((up-statsgw_last_up)/1024) / tdiff);
}
//statsgw_last_down = down;
//statsgw_last_up = up;
char bodystr[102400];
strcpy(bodystr,"");
strcat(bodystr,top_page);
tdlist_t tds = swift::GetTransferDescriptors();
tdlist_t::iterator iter;
for (iter = tds.begin(); iter != tds.end(); iter++) {
int td = *iter;
uint64_t total = (int)swift::Size(td);
uint64_t down = (int)swift::Complete(td);
int perc = (int)((down * 100) / total);
char roothashhexstr[1024];
sprintf(roothashhexstr,"%s", GetSwarmID(td).hex().c_str());
char templ[2048];
sprintf(templ,swarm_page_templ,roothashhexstr, perc, '%', dspeed, uspeed);
strcat(bodystr,templ);
}
strcat(bodystr,bottom_page);
char contlenstr[1024];
sprintf(contlenstr,PRISIZET,strlen(bodystr));
struct evkeyvalq *headers = evhttp_request_get_output_headers(evreq);
evhttp_add_header(headers, "Connection", "close");
evhttp_add_header(headers, "Content-Type", "text/html");
evhttp_add_header(headers, "Content-Length", contlenstr);
evhttp_add_header(headers, "Accept-Ranges", "none");
// Construct evbuffer and send via chunked encoding
struct evbuffer *evb = evbuffer_new();
int ret = evbuffer_add(evb,bodystr,strlen(bodystr));
if (ret < 0) {
print_error("statsgw: OverviewCallback: error evbuffer_add");
return;
}
evhttp_send_reply(evreq, 200, "OK", evb);
evbuffer_free(evb);
}
void StatsGetSpeedCallback(struct evhttp_request *evreq)
{
if (statsgw_last_time == 0) {
statsgw_last_time = NOW-1000000;
}
tint nu = Channel::Time();
uint64_t down = Channel::global_raw_bytes_down;
uint64_t up = Channel::global_raw_bytes_up;
int dspeed = 0, uspeed = 0;
tint tdiff = (nu - statsgw_last_time)/1000000;
if (tdiff > 0) {
dspeed = (int)(((down-statsgw_last_down)/1024) / tdiff);
uspeed = (int)(((up-statsgw_last_up)/1024) / tdiff);
}
statsgw_last_down = down;
statsgw_last_up = up;
statsgw_last_time = nu;
// Arno: PDD+ wants content speeds too
double contentdownspeed = 0.0, contentupspeed = 0.0;
uint32_t nleech=0,nseed=0;
tdlist_t tds = swift::GetTransferDescriptors();
tdlist_t::iterator iter;
for (iter = tds.begin(); iter != tds.end(); iter++) {
int td = *iter;
contentdownspeed += swift::GetCurrentSpeed(td,DDIR_DOWNLOAD);
contentupspeed += swift::GetCurrentSpeed(td,DDIR_UPLOAD);
nleech += swift::GetNumLeechers(td);
nseed += swift::GetNumSeeders(td);
// TODO: Are these active leechers and seeders, or potential seeders and leechers? In the latter case these can be retrieved when cached peers are implemented
}
int cdownspeed = (int)(contentdownspeed/1024.0);
int cupspeed = (int)(contentupspeed/1024.0);
char speedstr[1024];
sprintf(speedstr,
"{\"downspeed\": %d, \"success\": \"true\", \"upspeed\": %d, \"cdownspeed\": %d, \"cupspeed\": %d, \"nleech\": %d, \"nseed\": %d}",
dspeed, uspeed, cdownspeed, cupspeed, nleech, nseed);
char contlenstr[1024];
sprintf(contlenstr,PRISIZET,strlen(speedstr));
struct evkeyvalq *headers = evhttp_request_get_output_headers(evreq);
evhttp_add_header(headers, "Connection", "close");
evhttp_add_header(headers, "Content-Type", "application/json");
evhttp_add_header(headers, "Content-Length", contlenstr);
evhttp_add_header(headers, "Accept-Ranges", "none");
// Construct evbuffer and send via chunked encoding
struct evbuffer *evb = evbuffer_new();
int ret = evbuffer_add(evb,speedstr,strlen(speedstr));
if (ret < 0) {
print_error("statsgw: GetSpeedCallback: error evbuffer_add");
return;
}
evhttp_send_reply(evreq, 200, "OK", evb);
evbuffer_free(evb);
}
void StatsGwNewRequestCallback(struct evhttp_request *evreq, void *arg)
{
dprintf("%s @%i http new request\n",tintstr(),statsgw_reqs_count);
statsgw_reqs_count++;
if (evhttp_request_get_command(evreq) != EVHTTP_REQ_GET) {
return;
}
// Parse URI
const char *uri = evhttp_request_get_uri(evreq);
//struct evkeyvalq *headers = evhttp_request_get_input_headers(evreq);
//const char *contentrangestr =evhttp_find_header(headers,"Content-Range");
fprintf(stderr,"statsgw: GOT %s\n", uri);
if (strstr(uri,"get_speed_info") != NULL) {
StatsGetSpeedCallback(evreq);
} else if (!strncmp(uri,"/webUI/exit",strlen("/webUI/exit")) || statsgw_quit_process) {
statsgw_quit_process = true;
StatsExitCallback(evreq);
} else if (!strncmp(uri,"/webUI",strlen("/webUI"))) {
StatsOverviewCallback(evreq);
}
}
bool InstallStatsGateway(struct event_base *evbase,Address bindaddr)
{
// Arno, 2011-10-04: From libevent's http-server.c example
/* Create a new evhttp object to handle requests. */
statsgw_event = evhttp_new(evbase);
if (!statsgw_event) {
print_error("statsgw: evhttp_new failed");
return false;
}
/* Install callback for all requests */
evhttp_set_gencb(statsgw_event, StatsGwNewRequestCallback, NULL);
/* Now we tell the evhttp what port to listen on */
statsgw_handle = evhttp_bind_socket_with_handle(statsgw_event, bindaddr.ipstr().c_str(), bindaddr.port());
if (!statsgw_handle) {
print_error("statsgw: evhttp_bind_socket_with_handle failed");
return false;
}
return true;
}