552 lines
20 KiB
C++
552 lines
20 KiB
C++
#include "output_http.h"
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#include <mist/checksum.h>
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#include <mist/langcodes.h>
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#include <mist/stream.h>
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#include <mist/util.h>
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#include <set>
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#include <sys/stat.h>
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namespace Mist{
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HTTPOutput::HTTPOutput(Socket::Connection &conn) : Output(conn){
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webSock = 0;
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idleInterval = 0;
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idleLast = 0;
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if (config->getString("ip").size()){myConn.setHost(config->getString("ip"));}
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firstRun = true;
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if (config->getString("prequest").size()){
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myConn.Received().prepend(config->getString("prequest"));
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}
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config->activate();
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}
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HTTPOutput::~HTTPOutput(){
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if (webSock){
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delete webSock;
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webSock = 0;
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}
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}
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void HTTPOutput::init(Util::Config *cfg){
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Output::init(cfg);
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capa["deps"] = "HTTP";
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capa["forward"]["streamname"]["name"] = "Stream";
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capa["forward"]["streamname"]["help"] = "What streamname to serve.";
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capa["forward"]["streamname"]["type"] = "str";
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capa["forward"]["streamname"]["option"] = "--stream";
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capa["forward"]["ip"]["name"] = "IP";
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capa["forward"]["ip"]["help"] = "IP of forwarded connection.";
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capa["forward"]["ip"]["type"] = "str";
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capa["forward"]["ip"]["option"] = "--ip";
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capa["forward"]["ip"]["name"] = "Previous request";
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capa["forward"]["ip"]["help"] =
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"Data to pretend arrived on the socket before parsing the socket.";
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capa["forward"]["ip"]["type"] = "str";
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capa["forward"]["ip"]["option"] = "--prequest";
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cfg->addOption("streamname", JSON::fromString("{\"arg\":\"string\",\"short\":\"s\",\"long\":"
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"\"stream\",\"help\":\"The name of the stream "
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"that this connector will transmit.\"}"));
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cfg->addOption("ip", JSON::fromString("{\"arg\":\"string\",\"short\":\"I\",\"long\":\"ip\","
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"\"help\":\"IP address of connection on stdio.\"}"));
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cfg->addOption("prequest", JSON::fromString("{\"arg\":\"string\",\"short\":\"R\",\"long\":"
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"\"prequest\",\"help\":\"Data to pretend arrived "
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"on the socket before parsing the socket.\"}"));
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cfg->addBasicConnectorOptions(capa);
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}
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void HTTPOutput::onFail(const std::string &msg, bool critical){
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INFO_MSG("Failing '%s': %s", H.url.c_str(), msg.c_str());
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if (!webSock && !isRecording() && !responded){
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H.Clean(); // make sure no parts of old requests are left in any buffers
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H.SetHeader("Server", APPIDENT);
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H.setCORSHeaders();
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H.SetBody("Could not retrieve stream: " + msg);
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H.SendResponse("404", "Error opening stream", myConn);
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responded = true;
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}
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Output::onFail(msg, critical);
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}
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bool isMatch(const std::string &url, const std::string &m, std::string &streamname){
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size_t found = m.find('$');
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if (found != std::string::npos){
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if (url.size() < m.size()){return false;}
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if (m.substr(0, found) == url.substr(0, found) &&
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m.substr(found + 1) == url.substr(url.size() - (m.size() - found) + 1)){
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if (url.substr(found, url.size() - m.size() + 1).find('/') != std::string::npos){
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return false;
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}
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streamname = url.substr(found, url.size() - m.size() + 1);
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return true;
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}
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}
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return (url == m);
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}
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bool isPrefix(const std::string &url, const std::string &m, std::string &streamname){
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size_t found = m.find('$');
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if (found != std::string::npos){
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if (url.size() < m.size()){return false;}
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size_t found_suf = url.find(m.substr(found + 1), found);
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if (m.substr(0, found) == url.substr(0, found) && found_suf != std::string::npos){
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if (url.substr(found, found_suf - found).find('/') != std::string::npos){return false;}
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streamname = url.substr(found, found_suf - found);
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return true;
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}
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}else{
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return (url.substr(0, m.size()) == m);
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}
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return false;
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}
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/// - anything else: The request should be dispatched to a connector on the named socket.
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std::string HTTPOutput::getHandler(){
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std::string url = H.getUrl();
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// check the current output first, the most common case
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if (capa.isMember("url_match") || capa.isMember("url_prefix")){
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bool match = false;
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std::string streamname;
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// if there is a matcher, try to match
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if (capa.isMember("url_match")){
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if (capa["url_match"].isArray()){
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jsonForEach(capa["url_match"], it){
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match |= isMatch(url, it->asStringRef(), streamname);
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}
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}
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if (capa["url_match"].isString()){
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match |= isMatch(url, capa["url_match"].asStringRef(), streamname);
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}
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}
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// if there is a prefix, try to match
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if (capa.isMember("url_prefix")){
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if (capa["url_prefix"].isArray()){
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jsonForEach(capa["url_prefix"], it){
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match |= isPrefix(url, it->asStringRef(), streamname);
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}
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}
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if (capa["url_prefix"].isString()){
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match |= isPrefix(url, capa["url_prefix"].asStringRef(), streamname);
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}
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}
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if (match){
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if (streamname.size()){
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Util::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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}
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return capa["name"].asStringRef();
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}
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}
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// loop over the connectors
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Util::DTSCShmReader rCapa(SHM_CAPA);
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DTSC::Scan capa = rCapa.getMember("connectors");
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unsigned int capa_ctr = capa.getSize();
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for (unsigned int i = 0; i < capa_ctr; ++i){
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DTSC::Scan c = capa.getIndice(i);
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// if it depends on HTTP and has a match or prefix...
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if ((c.getMember("name").asString() == "HTTP" || c.getMember("deps").asString() == "HTTP") &&
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(c.getMember("url_match") || c.getMember("url_prefix"))){
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bool match = false;
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std::string streamname;
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// if there is a matcher, try to match
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if (c.getMember("url_match")){
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if (c.getMember("url_match").getSize()){
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for (unsigned int j = 0; j < c.getMember("url_match").getSize(); ++j){
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match |= isMatch(url, c.getMember("url_match").getIndice(j).asString(), streamname);
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}
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}else{
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match |= isMatch(url, c.getMember("url_match").asString(), streamname);
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}
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}
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// if there is a prefix, try to match
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if (c.getMember("url_prefix")){
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if (c.getMember("url_prefix").getSize()){
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for (unsigned int j = 0; j < c.getMember("url_prefix").getSize(); ++j){
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match |= isPrefix(url, c.getMember("url_prefix").getIndice(j).asString(), streamname);
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}
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}else{
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match |= isPrefix(url, c.getMember("url_prefix").asString(), streamname);
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}
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}
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if (match){
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if (streamname.size()){
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Util::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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}
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return capa.getIndiceName(i);
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}
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}
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}
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return "";
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}
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void HTTPOutput::requestHandler(){
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// Handle onIdle function caller, if needed
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if (idleInterval && (Util::bootMS() > idleLast + idleInterval)){
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onIdle();
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idleLast = Util::bootMS();
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}
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// Handle websockets
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if (webSock){
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if (webSock->readFrame()){
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onWebsocketFrame();
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idleLast = Util::bootMS();
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return;
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}
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if (!isBlocking && !parseData){Util::sleep(100);}
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return;
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}
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// If we can't read anything more and we're non-blocking, sleep some.
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if (!firstRun && !myConn.spool()){
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if (!isBlocking && !parseData){Util::sleep(100);}
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return;
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}
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firstRun = false;
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while (H.Read(myConn)){
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std::string handler = getHandler();
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if (handler != capa["name"].asStringRef() || H.GetVar("stream") != streamName){
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INFO_MSG("Received request: %s => %s (%s)", H.getUrl().c_str(), handler.c_str(), H.GetVar("stream").c_str());
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}else{
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MEDIUM_MSG("Received request: %s => %s (%s)", H.getUrl().c_str(), handler.c_str(), H.GetVar("stream").c_str());
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}
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if (!handler.size()){
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H.Clean();
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H.SetHeader("Server", APPIDENT);
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H.setCORSHeaders();
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H.SetBody("<!DOCTYPE html><html><head><title>Unsupported Media "
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"Type</title></head><body><h1>Unsupported Media Type</h1>The server isn't quite "
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"sure what you wanted to receive from it.</body></html>");
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H.SendResponse("415", "Unsupported Media Type", myConn);
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myConn.close();
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return;
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}
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std::string connHeader = H.GetHeader("Connection");
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Util::stringToLower(connHeader);
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if (handler != capa["name"].asStringRef() || H.GetVar("stream") != streamName){
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MEDIUM_MSG("Switching from %s (%s) to %s (%s)", capa["name"].asStringRef().c_str(),
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streamName.c_str(), handler.c_str(), H.GetVar("stream").c_str());
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streamName = H.GetVar("stream");
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userSelect.clear();
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if (statComm){statComm.setStatus(COMM_STATUS_DISCONNECT);}
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reConnector(handler);
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onFail("Server error - could not start connector", true);
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return;
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}
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/*LTS-START*/
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reqUrl = H.url + H.allVars();
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/*LTS-END*/
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if (H.hasHeader("User-Agent")){UA = H.GetHeader("User-Agent");}
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if (hasSessionIDs()){
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if (H.GetVar("sessId").size()){
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std::string ua = H.GetVar("sessId");
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crc = checksum::crc32(0, ua.data(), ua.size());
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}else{
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std::string ua = JSON::Value(getpid()).asString();
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crc = checksum::crc32(0, ua.data(), ua.size());
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}
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}else{
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std::string mixed_ua = UA + H.GetHeader("X-Playback-Session-Id");
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crc = checksum::crc32(0, mixed_ua.data(), mixed_ua.size());
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}
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if (H.GetVar("audio") != ""){targetParams["audio"] = H.GetVar("audio");}
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if (H.GetVar("video") != ""){targetParams["video"] = H.GetVar("video");}
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if (H.GetVar("subtitle") != ""){targetParams["subtitle"] = H.GetVar("subtitle");}
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if (H.GetVar("start") != ""){targetParams["start"] = H.GetVar("start");}
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if (H.GetVar("stop") != ""){targetParams["stop"] = H.GetVar("stop");}
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if (H.GetVar("startunix") != ""){targetParams["startunix"] = H.GetVar("startunix");}
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if (H.GetVar("stopunix") != ""){targetParams["stopunix"] = H.GetVar("stopunix");}
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if (H.GetVar("buffer") != ""){targetParams["buffer"] = H.GetVar("buffer");}
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// allow setting of play back rate through buffer variable.
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// play back rate is set in MS per second, but the variable is a simple multiplier.
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if (H.GetVar("rate") != ""){
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long long int multiplier = JSON::Value(H.GetVar("rate")).asInt();
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if (multiplier){
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realTime = 1000 / multiplier;
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}else{
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realTime = 0;
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}
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}
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if (H.GetHeader("X-Mist-Rate") != ""){
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long long int multiplier = JSON::Value(H.GetHeader("X-Mist-Rate")).asInt();
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if (multiplier){
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realTime = 1000 / multiplier;
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}else{
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realTime = 0;
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}
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}
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// Handle upgrade to websocket if the output supports it
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std::string upgradeHeader = H.GetHeader("Upgrade");
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Util::stringToLower(upgradeHeader);
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if (doesWebsockets() && upgradeHeader == "websocket"){
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INFO_MSG("Switching to Websocket mode");
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setBlocking(false);
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preWebsocketConnect();
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webSock = new HTTP::Websocket(myConn, H);
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if (!(*webSock)){
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delete webSock;
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webSock = 0;
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return;
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}
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onWebsocketConnect();
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H.Clean();
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return;
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}
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responded = false;
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preHTTP();
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onHTTP();
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idleLast = Util::bootMS();
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if (!H.bufferChunks){H.Clean();}
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}
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}
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/// Default implementation of preHTTP simply calls initialize and selectDefaultTracks.
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void HTTPOutput::preHTTP(){
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initialize();
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selectDefaultTracks();
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}
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static inline void builPipedPart(JSON::Value &p, char *argarr[], int &argnum, JSON::Value &argset){
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jsonForEach(argset, it){
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if (it->isMember("option") && p.isMember(it.key())){
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if (it->isMember("type")){
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if ((*it)["type"].asStringRef() == "str" && !p[it.key()].isString()){
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p[it.key()] = p[it.key()].asString();
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}
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if ((*it)["type"].asStringRef() == "uint" || (*it)["type"].asStringRef() == "int" ||
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(*it)["type"].asStringRef() == "debug"){
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p[it.key()] = JSON::Value(p[it.key()].asInt()).asString();
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}
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if ((*it)["type"].asStringRef() == "inputlist" && p[it.key()].isArray()){
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jsonForEach(p[it.key()], iVal){
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(*iVal) = iVal->asString();
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argarr[argnum++] = (char *)((*it)["option"].c_str());
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argarr[argnum++] = (char *)((*iVal).c_str());
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}
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continue;
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}
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}
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if (p[it.key()].asStringRef().size() > 0){
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argarr[argnum++] = (char *)((*it)["option"].c_str());
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argarr[argnum++] = (char *)(p[it.key()].c_str());
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}else{
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argarr[argnum++] = (char *)((*it)["option"].c_str());
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}
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}
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}
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}
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///\brief Handles requests by starting a corresponding output process.
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///\param connector The type of connector to be invoked.
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void HTTPOutput::reConnector(std::string &connector){
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// taken from CheckProtocols (controller_connectors.cpp)
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char *argarr[32];
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for (int i = 0; i < 32; i++){argarr[i] = 0;}
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int id = -1;
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JSON::Value pipedCapa;
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JSON::Value p; // properties of protocol
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{
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Util::DTSCShmReader rProto(SHM_PROTO);
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DTSC::Scan prots = rProto.getScan();
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unsigned int prots_ctr = prots.getSize();
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if (connector == "HTTP" || connector == "HTTP.exe"){
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// restore from values in the environment, regardless of configged settings
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if (getenv("MIST_HTTP_nostreamtext")){
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p["nostreamtext"] = getenv("MIST_HTTP_nostreamtext");
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}
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if (getenv("MIST_HTTP_pubaddr")){
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std::string pubAddrs = getenv("MIST_HTTP_pubaddr");
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p["pubaddr"] = JSON::fromString(pubAddrs);
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}
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}else{
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// find connector in config
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for (unsigned int i = 0; i < prots_ctr; ++i){
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if (prots.getIndice(i).getMember("connector").asString() == connector){
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id = i;
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break; // pick the first protocol in the list that matches the connector
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}
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}
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if (id == -1){
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connector = connector + ".exe";
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for (unsigned int i = 0; i < prots_ctr; ++i){
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if (prots.getIndice(i).getMember("connector").asString() == connector){
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id = i;
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break; // pick the first protocol in the list that matches the connector
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}
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}
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if (id == -1){
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connector = connector.substr(0, connector.size() - 4);
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ERROR_MSG("No connector found for: %s", connector.c_str());
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return;
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}
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}
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// read options from found connector
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p = prots.getIndice(id).asJSON();
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}
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HIGH_MSG("Connector found: %s", connector.c_str());
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Util::DTSCShmReader rCapa(SHM_CAPA);
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DTSC::Scan capa = rCapa.getMember("connectors");
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pipedCapa = capa.getMember(connector).asJSON();
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}
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// build arguments for starting output process
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std::string tmparg = Util::getMyPath() + std::string("MistOut") + connector;
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std::string tmpPrequest;
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if (H.url.size()){tmpPrequest = H.BuildRequest();}
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int argnum = 0;
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argarr[argnum++] = (char *)tmparg.c_str();
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std::string temphost = getConnectedHost();
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std::string debuglevel = JSON::Value(Util::printDebugLevel).asString();
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argarr[argnum++] = (char *)"--ip";
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argarr[argnum++] = (char *)(temphost.c_str());
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argarr[argnum++] = (char *)"--stream";
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argarr[argnum++] = (char *)(streamName.c_str());
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argarr[argnum++] = (char *)"--prequest";
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argarr[argnum++] = (char *)(tmpPrequest.c_str());
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// set the debug level if non-default
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if (Util::printDebugLevel != DEBUG){
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argarr[argnum++] = (char *)"--debug";
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argarr[argnum++] = (char *)(debuglevel.c_str());
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}
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if (pipedCapa.isMember("required")){builPipedPart(p, argarr, argnum, pipedCapa["required"]);}
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if (pipedCapa.isMember("optional")){builPipedPart(p, argarr, argnum, pipedCapa["optional"]);}
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/// start new/better process
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execv(argarr[0], argarr);
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}
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/*LTS-START*/
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std::string HTTPOutput::getConnectedHost(){
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std::string host = Output::getConnectedHost();
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std::string xRealIp = H.GetHeader("X-Real-IP");
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if (!xRealIp.size() || !isTrustedProxy(host)){
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static bool msg = false;
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if (xRealIp.size() && !msg && xRealIp != host){
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WARN_MSG("Host %s is attempting to act as a proxy, but not trusted", host.c_str());
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msg = true;
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}
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return host;
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}
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return xRealIp;
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}
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std::string HTTPOutput::getConnectedBinHost(){
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// Do first check with connected host because of simplicity
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std::string host = Output::getConnectedHost();
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std::string xRealIp = H.GetHeader("X-Real-IP");
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if (!xRealIp.size() || !isTrustedProxy(host)){
|
|
static bool msg = false;
|
|
if (xRealIp.size() && !msg && xRealIp != host){
|
|
WARN_MSG("Host %s is attempting to act as a proxy, but not trusted", host.c_str());
|
|
msg = true;
|
|
}
|
|
return Output::getConnectedBinHost();
|
|
}
|
|
|
|
Socket::Connection binConn;
|
|
binConn.setHost(xRealIp);
|
|
return binConn.getBinHost();
|
|
}
|
|
|
|
bool HTTPOutput::isTrustedProxy(const std::string &ip){
|
|
static std::set<std::string> trustedProxies;
|
|
if (!trustedProxies.size()){
|
|
trustedProxies.insert("localhost");
|
|
|
|
IPC::sharedPage rPage(SHM_PROXY, 0, false, false);
|
|
if (rPage){
|
|
Util::RelAccX rAcc(rPage.mapped);
|
|
std::string trustedList(rAcc.getPointer("proxy_data"), rAcc.getSize("proxy_data"));
|
|
size_t pos = 0;
|
|
size_t endPos;
|
|
while (pos != std::string::npos){
|
|
endPos = trustedList.find(" ", pos);
|
|
trustedProxies.insert(trustedList.substr(pos, endPos - pos));
|
|
pos = endPos;
|
|
if (pos != std::string::npos){pos++;}
|
|
}
|
|
}
|
|
}
|
|
std::string binIp = Socket::getBinForms(ip);
|
|
for (std::set<std::string>::iterator it = trustedProxies.begin(); it != trustedProxies.end(); ++it){
|
|
if (Socket::isBinAddress(binIp, *it)){return true;}
|
|
}
|
|
return false;
|
|
}
|
|
/*LTS-END*/
|
|
|
|
/// Parses a "Range: " header, setting byteStart and byteEnd.
|
|
/// Assumes byteStart and byteEnd are initialized to their minimum respectively maximum values
|
|
/// when the function is called. On error, byteEnd is set to zero and the function return false.
|
|
bool HTTPOutput::parseRange(uint64_t &byteStart, uint64_t &byteEnd){
|
|
std::string header = H.GetHeader("Range");
|
|
if (header.size() < 6 || header.substr(0, 6) != "bytes="){
|
|
byteEnd = 0;
|
|
WARN_MSG("Invalid range header: %s", header.c_str());
|
|
return false;
|
|
}
|
|
header.erase(0, 6);
|
|
// Do parsing of the rest of the header...
|
|
if (header.size() && header[0] == '-'){
|
|
// negative range = count from end
|
|
byteStart = 0;
|
|
for (unsigned int i = 1; i < header.size(); ++i){
|
|
if (header[i] >= '0' && header[i] <= '9'){
|
|
byteStart *= 10;
|
|
byteStart += header[i] - '0';
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (byteStart > byteEnd){
|
|
// entire file if starting before byte zero
|
|
byteStart = 0;
|
|
}else{
|
|
// start byteStart bytes before byteEnd
|
|
byteStart = byteEnd - byteStart;
|
|
}
|
|
MEDIUM_MSG("Range request: %" PRIu64 "-%" PRIu64 " (%s)", byteStart, byteEnd, header.c_str());
|
|
return true;
|
|
}
|
|
|
|
// Positive range
|
|
long long size = byteEnd;
|
|
byteEnd = 0;
|
|
byteStart = 0;
|
|
unsigned int i = 0;
|
|
for (; i < header.size(); ++i){
|
|
if (header[i] >= '0' && header[i] <= '9'){
|
|
byteStart *= 10;
|
|
byteStart += header[i] - '0';
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (header[i] != '-'){
|
|
WARN_MSG("Invalid range header: %s", header.c_str());
|
|
byteEnd = 0;
|
|
return false;
|
|
}
|
|
++i;
|
|
if (i < header.size()){
|
|
for (; i < header.size(); ++i){
|
|
if (header[i] >= '0' && header[i] <= '9'){
|
|
byteEnd *= 10;
|
|
byteEnd += header[i] - '0';
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (byteEnd > size){byteEnd = size;}
|
|
}else{
|
|
byteEnd = size;
|
|
}
|
|
MEDIUM_MSG("Range request: %" PRIu64 "-%" PRIu64 " (%s)", byteStart, byteEnd, header.c_str());
|
|
return true;
|
|
}
|
|
|
|
}// namespace Mist
|