br-serve.cpp
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright 2014 Noblis *
* *
* 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 <QtCore>
#include <QtNetwork>
#include <cstdio>
#include <cstring>
#include <qhttpserver.h>
#include <qhttprequest.h>
#include <qhttpresponse.h>
#include <openbr/universal_template.h>
static void help()
{
printf("br-serve [command]\n"
"==================\n"
"\n"
"_br-serve_ converts the command's stdin/stdout into a web service.\n"
"\n"
"Optional Arguments\n"
"------------------\n"
"* -help - Print usage information.\n"
"* -port <int> - The port to communicate on (80 otherwise).");
}
static int port = 80;
static QProcess process;
class Handler : public QObject
{
Q_OBJECT
public slots:
void handle(QHttpRequest *request, QHttpResponse *response)
{
QByteArray message;
const QUrlQuery urlQuery(request->url());
if (urlQuery.hasQueryItem("url")) {
process.write(qPrintable(QString(urlQuery.queryItemValue("url") + "\n")));
process.waitForReadyRead();
message = process.readAll();
} else {
QString path = request->path();
if (path == "/")
path = "localhost";
message = QString("<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>Web Services API</title>\n"
"</head>\n"
"\n"
"<body>\n"
" <h1><a href=\"http://en.wikipedia.org/wiki/Query_string\">Query String</a> Parameters</h1>"
" <ul>\n"
" <li><b>url</b> - Query URL for processing.</li>\n"
" </ul>\n"
" <h1>Examples</h1>\n"
" <ul>\n"
" <li>http://%1%2/?url=data.liblikely.org/misc/lenna.tiff</li>\n"
" </ul>\n"
"</body>\n"
"</html>").arg(path, port == 80 ? QString() : (QString(":") + QString::number(port))).toLatin1();
}
response->setHeader("Content-Length", QString::number(message.size()));
response->writeHead(200); // everything is OK
response->write(message);
response->end();
}
};
int main(int argc, char *argv[])
{
QCoreApplication application(argc, argv);
for (int i=1; i<argc; i++) {
if (!strcmp(argv[i], "-help")) { help(); exit(EXIT_SUCCESS); }
else if (!strcmp(argv[i], "-port")) port = atoi(argv[++i]);
else process.start(argv[i]);
}
QHttpServer server;
Handler handler;
QObject::connect(&server, SIGNAL(newRequest(QHttpRequest*, QHttpResponse*)),
&handler, SLOT(handle(QHttpRequest*, QHttpResponse*)));
server.listen(port);
return application.exec();
}
#include "br-serve.moc"