how to get indented JSON values in C++ ?
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Hey guys i know how to get indented JSON values in QML/JS .
But how to get it in C++
i want to get text section from it : text seciton contains HTML . Later i want to store this html in a html file
Please just go through my code and see the resultMain.cpp
#include <QGuiApplication> #include <QQmlApplicationEngine> #include <QDebug> #include <QNetworkAccessManager> #include <QNetworkRequest> #include <QNetworkReply> #include <QUrl> #include <QUrlQuery> #include <QJsonObject> #include <QJsonDocument> #include <QByteArray> #include <QFile> int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); // create custom temporary event loop on stack QEventLoop eventLoop; // "quit()" the event-loop, when the network request "finished()" QNetworkAccessManager mgr; QObject::connect(&mgr, SIGNAL(finished(QNetworkReply*)), &eventLoop, SLOT(quit())); // the HTTP request QNetworkRequest req( QUrl( QString("http://en.wikitolearn.org/api.php?action=parse&page=Intro%20cryptography&format=json") ) ); QNetworkReply *reply = mgr.get(req); eventLoop.exec(); if (reply->error() == QNetworkReply::NoError) { //success //qDebug() << "Success" <<reply->readAll(); QString html = (QString)reply->readAll(); QJsonDocument jsonResponse = QJsonDocument::fromJson(html.toUtf8()); QJsonObject jsonObj = jsonResponse.object(); qDebug() << jsonObj; qDebug() << "parse" << jsonObj["parse"].toString(); // qDebug() << html; delete reply; } else { //failure qDebug() << "Failure" <<reply->errorString(); delete reply; } return app.exec(); }This is the JSON that the API returns me
QJsonObject({ "parse": { "categories": [{ "*": "Cryptography", "missing": "", "sortkey": "" }], "displaytitle": "Intro cryptography", "externallinks": [], "images": [], "iwlinks": [], "langlinks": [], "links": [], "pageid": 510, "properties": [], "revid": 2513, "sections": [], "templates": [], "text": { "*": "<p>Introduction to Cryptography \n</p><p><b>What is Cryptography ?</b>\nCryptography is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it\n</p><p><b>Cryptography is everywhere</b>\n</p><p>- Web traffic : HTTPS \n- wireless Traffic : 802.11 ; WPA2 , GSM , Bluetooth \n</p><p>- content protection : DVD , blu-ray (CSS : content scramble system )\n</p><p>- User authentication\n</p>\n<pre> Secure communication : cryptography makes it possible for Alice and bob to communicate securely . \n</pre>\n<p>||ALICE|| -----------HTTPS/TLS----------->||BOB||\n</p><p>User authentication has 2 main parts :\n</p><p>1. Handshake protocol : establishes shared secret key using public-key cryptography \n2. Record layer : Transmit data using shared secret key . Ensure confidantiality and integrity .\n</p><p><br />\n<b>Building block : Symmetric Encryption</b>\n</p>\n<pre> Symmetric encryption is the oldest and best-known technique. A secret key, which can be a number, a word, or just a string of random letters, is applied to the text of a message to change the content in a particular way. \n</pre>\n<pre>E : encryption , D: decryption , PT : plaintext , CT: ciphertext\n</pre>\n<p>E(PT) = CT \nD(E(PT)) = PT \n</p><p><b>USE CASES</b>\n</p>\n<pre>Single use key  : key is only used to encrypt one message\nencrypted e-mail : new key generated for every mail . \n</pre>\n<pre>Multi use key : (many time key )\n Key used to encrypt multiple messages . \nencrypted files  : same key used for many files . \n</pre>\n<p>Things to remember \n</p><p>- Cryptography is  : \n</p>\n<pre> * a tremendous tool \n * the basis for many security mechanisms\n</pre>\n<p>- Cryptography is not :\n</p>\n<pre> * a solution to all security problems \n * reliable unless implemented or used properly\n * something you should try to invent yourself .\n</pre>\n<!-- \nNewPP limit report\nCached time: 20160603075003\nCache expiry: 86400\nDynamic content: false\nCPU time usage: 0.008 seconds\nReal time usage: 0.009 seconds\nPreprocessor visited node count: 1/1000000\nPreprocessor generated node count: 4/1000000\nPost‐expand include size: 0/2097152 bytes\nTemplate argument size: 0/2097152 bytes\nHighest expansion depth: 1/40\nExpensive parser function count: 0/100\n-->\n\n<!-- \nTransclusion expansion time report (%,ms,calls,template)\n100.00% 0.000 1 - -total\n-->\n\n<!-- Saved in parser cache with key enwikitolearn:pcache:idhash:510-0!*!*!*!*!*!* and timestamp 20160603075003 and revision id 2513\n -->\n" }, "title": "Intro cryptography" } })wrote on 3 Jun 2016, 10:29 last edited byHi @Qjay,
i want to get text section from it : text seciton contains HTML
Try:
qDebug() << jsonResponse.object()["parse"].toObject()["text"].toObject()["*"].toString();Cheers.
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wrote on 3 Jun 2016, 10:55 last edited by
Thanks paul colby !! It worked out .
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wrote on 4 Jun 2016, 19:13 last edited by
i also want to get pageid and revid too .
I tried this : but was not able to get the pageid :/
jsonResponse.object()["parse"].toObject()["pageid"].toString(); -
i also want to get pageid and revid too .
I tried this : but was not able to get the pageid :/
jsonResponse.object()["parse"].toObject()["pageid"].toString();wrote on 4 Jun 2016, 19:23 last edited byThe
pageidvalue in your JSON is not a string but rather an integer, hence you have to useQJsonValue::toInt()instead ofQJsonValue::toString():jsonResponse.object()["parse"].toObject()["pageid"].toInt(); -
wrote on 8 Aug 2018, 14:45 last edited by
Hi All,
Need some help from you,
How to remove "\n" between Two Json Attribute while printing . -
Hi All,
Need some help from you,
How to remove "\n" between Two Json Attribute while printing .@Anil-Patel
Hi
Show how you "print" please ? -
@Anil-Patel
Hi
Show how you "print" please ?wrote on 9 Aug 2018, 07:30 last edited by@mrjj {
"app": "PromotionDngineyscad",
"host": "WINASBAV7d7d750142-UBN",
"log": "PromoLog",
"lvl": "Messages",
"msg": "Initialized",
"thread": "237fbb2db10",
"timestamp": "1533796312.526572",
"uuid": "e62191c4-8891-4c92-a908-da01a3dakje3ac7ad"
} -
@mrjj {
"app": "PromotionDngineyscad",
"host": "WINASBAV7d7d750142-UBN",
"log": "PromoLog",
"lvl": "Messages",
"msg": "Initialized",
"thread": "237fbb2db10",
"timestamp": "1533796312.526572",
"uuid": "e62191c4-8891-4c92-a908-da01a3dakje3ac7ad"
}@Anil-Patel You should reread the question from @mrjj
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@mrjj {
"app": "PromotionDngineyscad",
"host": "WINASBAV7d7d750142-UBN",
"log": "PromoLog",
"lvl": "Messages",
"msg": "Initialized",
"thread": "237fbb2db10",
"timestamp": "1533796312.526572",
"uuid": "e62191c4-8891-4c92-a908-da01a3dakje3ac7ad"
}Lifetime Qt Championwrote on 9 Aug 2018, 09:17 last edited by mrjj 8 Sept 2018, 12:48@Anil-Patel
I did mean the code :)
if you use printf, qDebug, or what ever.You could use QString's replace if the newline are truely in the the json string. -
Hi All,
Need some help from you,
How to remove "\n" between Two Json Attribute while printing .wrote on 9 Aug 2018, 11:37 last edited by@Anil-Patel Hi,
Please make a new post for a new question, even more if you are not the author of the original question...For your issue, I think you need to call
QJsonDocument::toJson(QJsonDocument::Compact)when you export your json content to string. -
@Anil-Patel Hi,
Please make a new post for a new question, even more if you are not the author of the original question...For your issue, I think you need to call
QJsonDocument::toJson(QJsonDocument::Compact)when you export your json content to string.wrote on 9 Aug 2018, 12:24 last edited by@Gojir4
Sure, Thanks for your Help.
