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#include <map>
#include "Http.h"
#include "HttpServer.h"
#include "Socket.h"
#include "BStream.h"
static const ev_tstamp s_httpTimeout = 15;
namespace Balau {
class HttpWorker : public Task {
public:
HttpWorker(IO<Socket> & io, void * server);
~HttpWorker();
private:
virtual void Do();
virtual const char * getName();
bool handleClient();
void send400(Events::BaseEvent * evt);
IO<Socket> m_socket;
IO<BStream> m_strm;
String m_name;
uint8_t * m_postData;
};
};
Balau::HttpWorker::HttpWorker(IO<Socket> & io, void * _server) : m_socket(io), m_strm(new BStream(io)), m_postData(NULL) {
HttpServer * server = (HttpServer *) _server;
m_name.set("HttpWorker(%s)", m_socket->getName());
// copy stuff from server, such as port number, root document, base URL, etc...
}
Balau::HttpWorker::~HttpWorker() {
if (m_postData) {
free(m_postData);
m_postData = NULL;
}
}
void Balau::HttpWorker::send400(Events::BaseEvent * evt) {
static const char str[] =
"HTTP/1.0 400 Bad Request\r\n"
"Content-Type: text/html; charset=UTF-8\r\n"
"Connection: close\r\n"
"\r\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
"\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"
" <head>\n"
" <title>Bad Request</title>\n"
" </head>\n"
"\n"
" <body>\n"
" The HTTP request you've sent is invalid.\n"
" </body>\n"
"</html>\n";
setOkayToEAgain(false);
m_socket->forceWrite(str, sizeof(str), evt);
Balau::Printer::elog(Balau::E_HTTPSERVER, "%s had an invalid request", m_name.to_charp());
}
bool Balau::HttpWorker::handleClient() {
Events::Timeout evtTimeout(s_httpTimeout);
waitFor(&evtTimeout);
setOkayToEAgain(true);
String line;
bool gotFirst = false;
int method = -1;
String url;
String HttpVersion;
typedef std::map<String, String> HttpHeaders_t;
HttpHeaders_t HttpHeaders;
if (m_postData) {
free(m_postData);
m_postData = NULL;
}
bool persistent = false;
// read client's request
do {
try {
line = m_strm->readString();
}
catch (EAgain) {
if (evtTimeout.gotSignal()) {
Balau::Printer::elog(Balau::E_HTTPSERVER, "%s timed out getting request", m_name.to_charp());
return false;
}
yield();
continue;
}
// until we get a blank line
if (line == "")
break;
if (!gotFirst) {
gotFirst = true;
int urlBegin = 0;
// first line is in the form of METHOD URL HTTP/1.x
switch(line[0]) {
case 'G':
if ((line[1] == 'E') && (line[2] == 'T') && (line[3] == ' ')) {
urlBegin = 4;
method = Http::GET;
}
break;
case 'P':
if ((line[1] == 'O') && (line[2] == 'S') && (line[3] == 'T') && (line[4] == ' ')) {
urlBegin = 5;
method = Http::POST;
}
break;
}
if (urlBegin == 0) {
send400(&evtTimeout);
return false;
}
int urlEnd = line.strrchr(' ') - 1;
if (urlEnd < urlBegin) {
send400(&evtTimeout);
return false;
}
url = line.extract(urlBegin, urlEnd - urlBegin + 1);
int httpBegin = urlEnd + 2;
if ((httpBegin + 5) >= line.strlen()) {
send400(&evtTimeout);
return false;
}
if ((line[httpBegin + 0] == 'H') &&
(line[httpBegin + 1] == 'T') &&
(line[httpBegin + 2] == 'T') &&
(line[httpBegin + 3] == 'P') &&
(line[httpBegin + 4] == '/')) {
HttpVersion = line.extract(httpBegin + 5);
} else {
send400(&evtTimeout);
return false;
}
if ((HttpVersion != "1.0") && (HttpVersion != "1.1")) {
send400(&evtTimeout);
return false;
}
} else {
// parse HTTP header.
int colon = line.strchr(':');
if (colon <= 0) {
send400(&evtTimeout);
return false;
}
String key = line.extract(0, colon);
String value = line.extract(colon + 1);
value.trim();
HttpHeaders[key] = value;
}
} while(true);
if (!gotFirst) {
send400(&evtTimeout);
return false;
}
if (method == Http::POST) {
int lengthStr = 0;
HttpHeaders_t::iterator i = HttpHeaders.find("Content-Length");
if (i != HttpHeaders.end())
lengthStr = i->second.to_int();
m_postData = (uint8_t *) malloc(lengthStr);
try {
m_strm->forceRead(m_postData, lengthStr);
}
catch (EAgain) {
Assert(evtTimeout.gotSignal());
Balau::Printer::elog(Balau::E_HTTPSERVER, "%s timed out getting request (reading POST values)", m_name.to_charp());
return false;
}
}
if (HttpVersion == "1.1") {
HttpHeaders_t::iterator i = HttpHeaders.find("Connection");
if (i != HttpHeaders.end()) {
if (i->second != "close") {
send400(&evtTimeout);
return false;
}
} else {
persistent = true;
}
}
// process query; everything should be here now
// query process finished; wrapping up and exiting.
return persistent;
}
void Balau::HttpWorker::Do() {
bool clientStop = false;
while (!clientStop)
clientStop = !handleClient() || m_socket->isClosed();
}
const char * Balau::HttpWorker::getName() {
return m_name.to_charp();
}
typedef Balau::Listener<Balau::HttpWorker> HttpListener;
void Balau::HttpServer::start() {
Assert(!m_started);
m_listenerPtr = new HttpListener(m_port, m_local.to_charp());
m_started = true;
}
void Balau::HttpServer::stop() {
Assert(m_started);
reinterpret_cast<HttpListener *>(m_listenerPtr)->stop();
m_started = false;
}
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