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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- google.qdoc -->
<head>
<title>Using SOAP with the Google API</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">Using SOAP with the Google API<br /><span class="subtitle"></span>
</h1>
<p>This example shows how to use the SOAP component to submit searches via the Google SOAP API.</p>
<p>Testing this example requires a valid license key, which is available for free from http://api.google.com/.</p>
<hr>
<p>examples/google/google.h:</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
****************************************************************************/</span>
#ifndef GOOGLE_H_INCLUDED
#define GOOGLE_H_INCLUDED
#include <QtGui/QWidget>
#include <qtsoap.h>
class QLineEdit;
class QTextBrowser;
class QPushButton;
class Google : public QWidget
{
Q_OBJECT
public:
Google(QWidget *parent = 0);
private slots:
void submitRequest();
void getResponse();
private:
QtSoapHttpTransport http;
QLineEdit *searchString;
QLineEdit *googleKey;
QTextBrowser *resultView;
QPushButton *quitButton;
QPushButton *searchButton;
QString key;
};
#endif</pre>
<hr>
<p>examples/google/google.cpp:</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
****************************************************************************/</span>
#include <QtGui/QApplication>
#include <QtGui/QMessageBox>
#include <QtGui/QCursor>
#include <QtCore/QFile>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QTextBrowser>
#include <QtGui/QLayout>
#include <QtGui/QPushButton>
#include "google.h"
Google::Google(QWidget *parent)
: QWidget(parent), http(this)
{
<span class="comment">// Generate the GUI.</span>
quitButton = new QPushButton("&Quit", this);
searchString = new QLineEdit(this);
resultView = new QTextBrowser(this);
QVBoxLayout *layout = new QVBoxLayout(this);
QLabel *gLabel = new QLabel("Google Web APIs license key: ", this);
googleKey = new QLineEdit(this);
QHBoxLayout *topBar = new QHBoxLayout();
topBar->addWidget(gLabel);
topBar->addWidget(googleKey);
layout->addLayout(topBar);
QLabel *sLabel = new QLabel("Search string: ", this);
QPushButton *searchButton = new QPushButton("Search!", this);
QHBoxLayout *searchBar = new QHBoxLayout();
searchBar->addWidget(sLabel);
searchBar->addWidget(searchString);
searchBar->addWidget(searchButton);
layout->addLayout(searchBar);
layout->addWidget(resultView);
layout->addWidget(quitButton);
<span class="comment">// Connect signals to slots. Note the submitRequest() slots.</span>
connect(&http, SIGNAL(responseReady()), SLOT(getResponse()));
connect(quitButton, SIGNAL(clicked()), SLOT(close()));
connect(searchString, SIGNAL(returnPressed()), SLOT(submitRequest()));
connect(searchButton, SIGNAL(clicked()), SLOT(submitRequest()));
connect(googleKey, SIGNAL(returnPressed()), SLOT(submitRequest()));
<span class="comment">// Pressing enter should trigger a search, unless focus has been</span>
<span class="comment">// explicitly moved.</span>
searchButton->setDefault(true);
<span class="comment">// Prepare to submit request.</span>
http.setAction("urn:GoogleSearchAction");
http.setHost("api.google.com");
}
void Google::submitRequest()
{
<span class="comment">// Check that the license key is set.</span>
if (googleKey->text() == "") {
QMessageBox::warning(this, tr("Missing license key"),
tr("Please enter your Google Web APIs license key."
" If you do not have one, you can visit<br>"
" http:<span class="comment">//api.google.com/ and create a Google"</span>
" account to obtain a license key."));
return;
}
<span class="comment">// Check that we have a search string.</span>
if (searchString->text() == "") {
QMessageBox::warning(this, tr("Missing search string"),
tr("Please enter a search string."));
return;
}
<span class="comment">// Generate request. Details about how to generate a proper</span>
<span class="comment">// request are available from http://api.google.com/. The results</span>
<span class="comment">// are always fetched as latin1 in this example, but this can be</span>
<span class="comment">// easily changed (see the "ie" and "oe" arguments below).</span>
QtSoapMessage request;
request.setMethod(QtSoapQName("doGoogleSearch", "urn:GoogleSearch"));
request.addMethodArgument("key", "", googleKey->text());
request.addMethodArgument("q", "", searchString->text());
request.addMethodArgument("start", "", 0);
request.addMethodArgument("maxResults", "", 10);
request.addMethodArgument("filter", "", false, 0);
request.addMethodArgument("restrict", "", "");
request.addMethodArgument("safeSearch", "", false, 0);
request.addMethodArgument("lr", "", "");
request.addMethodArgument("ie", "", "latin1");
request.addMethodArgument("oe", "", "latin1");
<span class="comment">// Submit the method request to the web service.</span>
http.submitRequest(request, "/search/beta2");
<span class="comment">// Set the cursor to wait mode.</span>
QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
}
void Google::getResponse()
{
<span class="comment">// Set cursor back to normal shape.</span>
QApplication::restoreOverrideCursor();
<span class="comment">// Reset resultView.</span>
resultView->clear();
<span class="comment">// Get the response, check for error.</span>
const QtSoapMessage &resp = http.getResponse();
if (resp.isFault()) {
resultView->setHtml(tr("<b>Query failed</b>: ")
+ resp.faultString().value().toString());
return;
}
<span class="comment">// Extract the return value from this method response, check for</span>
<span class="comment">// errors.</span>
const QtSoapType &res = resp.returnValue();
if (!res.isValid()) {
resultView->append(tr("Invalid return value"));
return;
}
<span class="comment">// Generate resultView output. Make it resemble the actual web</span>
<span class="comment">// output from http://www.google.com/.</span>
QString header(tr("Searched the web for <b>%1</b>, results %2 - %3 "
"of about %4. Search took %5 seconds.<br><hr>")
.arg(res["searchQuery"].toString())
.arg(res["startIndex"].toInt())
.arg(res["endIndex"].toInt())
.arg(res["estimatedTotalResultsCount"].toInt())
.arg(res["searchTime"].value().toDouble(), 0, 'f', 2));
const QtSoapType &resultElements = res["resultElements"];
QString allElements;
for (int i = 0; i < resultElements.count(); ++i) {
const QtSoapType &resultElement = res["resultElements"][i];
QString cat = resultElement["directoryCategory"]["fullViewableName"].toString();
QString summary = resultElement["summary"].toString();
QString title = resultElement["title"].toString();
QString snippet = resultElement["snippet"].toString();
QString url = resultElement["URL"].toString();
QString cachedSize = resultElement["cachedSize"].toString();
QString thisElement = "<br>";
if (!title.isEmpty()) {
thisElement += "<font color=\"#0000FF\"><b><u>"
+ title + "</u></b></font><br>";
} else {
thisElement += "<font color=\"#0000FF\"><b><u>"
+ url + "</u></b></font><br>";
}
if (!snippet.isEmpty())
thisElement += snippet + "<br>";
if (!summary.isEmpty()) {
thisElement += "<font color=\"#808080\">Description:</font> "
+ summary + "<br>";
}
if (!cat.isEmpty()) {
thisElement += "<font color=\"#808080\">Category: <u>"
+ cat + "</u></font><br>";
}
if (!title.isEmpty()) {
thisElement += "<font color=\"#008000\"><u>" + url
+ "</u> - " + cachedSize + "</font><br>";
}
allElements += thisElement;
}
<span class="comment">// Update the resultView.</span>
resultView->setHtml(header + allElements);
}</pre>
<hr>
<p>examples/google/main.cpp:</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
****************************************************************************/</span>
#include <QtGui/QApplication>
#include "google.h"
int main(int argc, char **argv)
{
QApplication app(argc, argv);
Google google;
google.show();
return app.exec();
}</pre>
<hr>
<p>examples/google/google.pro:</p>
<pre> TEMPLATE = app
INCLUDEPATH += .
include(../../src/qtsoap.pri)
# Input
HEADERS += google.h
SOURCES += google.cpp main.cpp</pre>
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<td width="30%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
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