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// miniwebserver.cpp
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pch.h"
#include "miniwebserver.h"
#include "../hex.h"
#include "pcrecpp.h"
namespace mongo {
MiniWebServer::MiniWebServer(const string& name, const string &ip, int port)
: Listener(name, ip, port, false)
{}
string MiniWebServer::parseURL( const char * buf ) {
const char * urlStart = strchr( buf , ' ' );
if ( ! urlStart )
return "/";
urlStart++;
const char * end = strchr( urlStart , ' ' );
if ( ! end ) {
end = strchr( urlStart , '\r' );
if ( ! end ) {
end = strchr( urlStart , '\n' );
}
}
if ( ! end )
return "/";
int diff = (int)(end-urlStart);
if ( diff < 0 || diff > 255 )
return "/";
return string( urlStart , (int)(end-urlStart) );
}
void MiniWebServer::parseParams( BSONObj & params , string query ) {
if ( query.size() == 0 )
return;
BSONObjBuilder b;
while ( query.size() ) {
string::size_type amp = query.find( "&" );
string cur;
if ( amp == string::npos ) {
cur = query;
query = "";
}
else {
cur = query.substr( 0 , amp );
query = query.substr( amp + 1 );
}
string::size_type eq = cur.find( "=" );
if ( eq == string::npos )
continue;
b.append( urlDecode(cur.substr(0,eq)) , urlDecode(cur.substr(eq+1) ) );
}
params = b.obj();
}
string MiniWebServer::parseMethod( const char * headers ) {
const char * end = strchr( headers , ' ' );
if ( ! end )
return "GET";
return string( headers , (int)(end-headers) );
}
const char *MiniWebServer::body( const char *buf ) {
const char *ret = strstr( buf, "\r\n\r\n" );
return ret ? ret + 4 : ret;
}
bool MiniWebServer::fullReceive( const char *buf ) {
const char *bod = body( buf );
if ( !bod )
return false;
const char *lenString = "Content-Length:";
const char *lengthLoc = strstr( buf, lenString );
if ( !lengthLoc )
return true;
lengthLoc += strlen( lenString );
long len = strtol( lengthLoc, 0, 10 );
if ( long( strlen( bod ) ) == len )
return true;
return false;
}
void MiniWebServer::accepted(Socket sock) {
sock.postFork();
sock.setTimeout(8);
char buf[4096];
int len = 0;
while ( 1 ) {
int left = sizeof(buf) - 1 - len;
if( left == 0 )
break;
int x = sock.unsafe_recv( buf + len , left );
if ( x <= 0 ) {
sock.close();
return;
}
len += x;
buf[ len ] = 0;
if ( fullReceive( buf ) ) {
break;
}
}
buf[len] = 0;
string responseMsg;
int responseCode = 599;
vector<string> headers;
try {
doRequest(buf, parseURL( buf ), responseMsg, responseCode, headers, sock.remoteAddr() );
}
catch ( std::exception& e ) {
responseCode = 500;
responseMsg = "error loading page: ";
responseMsg += e.what();
}
catch ( ... ) {
responseCode = 500;
responseMsg = "unknown error loading page";
}
stringstream ss;
ss << "HTTP/1.0 " << responseCode;
if ( responseCode == 200 ) ss << " OK";
ss << "\r\n";
if ( headers.empty() ) {
ss << "Content-Type: text/html\r\n";
}
else {
for ( vector<string>::iterator i = headers.begin(); i != headers.end(); i++ ) {
assert( strncmp("Content-Length", i->c_str(), 14) );
ss << *i << "\r\n";
}
}
ss << "Connection: close\r\n";
ss << "Content-Length: " << responseMsg.size() << "\r\n";
ss << "\r\n";
ss << responseMsg;
string response = ss.str();
try {
sock.send( response.c_str(), response.size() , "http response" );
sock.close();
}
catch ( SocketException& e ) {
log(1) << "couldn't send data to http client: " << e << endl;
}
}
string MiniWebServer::getHeader( const char * req , string wanted ) {
const char * headers = strchr( req , '\n' );
if ( ! headers )
return "";
pcrecpp::StringPiece input( headers + 1 );
string name;
string val;
pcrecpp::RE re("([\\w\\-]+): (.*?)\r?\n");
while ( re.Consume( &input, &name, &val) ) {
if ( name == wanted )
return val;
}
return "";
}
string MiniWebServer::urlDecode(const char* s) {
stringstream out;
while(*s) {
if (*s == '+') {
out << ' ';
}
else if (*s == '%') {
out << fromHex(s+1);
s+=2;
}
else {
out << *s;
}
s++;
}
return out.str();
}
} // namespace mongo
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