I use the Qt v5.5. I need http get a request like this
QUrlQuery urlQuery;
urlQuery.setQuery("https://lalala.com/login");
urlQuery.addQueryItem("submit", "");
urlQuery.addQueryItem("email", "email#email.com");
urlQuery.addQueryItem("pass", "unbelievable_password");
when I call urlQuery.query(); the url is
"https://lalala.com/login&submit=&email=email#email.com&pass=unbelievable_password"
the param "submit" is the first param, it need use '?' split the param name, but the param is split by '&'.
You want to get the URL into a QUrl, then add query items on that -- and not have the URL as a query item itself!
QUrl url("https://www.foo.com");
QUrlQuery query;
query.addQueryItem("email", "foo#bar.com");
query.addQueryItem("pass", "secret");
url.setQuery(query);
qDebug() << url;
Correctly prints
QUrl("https://www.foo.com?email=foo#bar.com&pass=secret")
Looks like there's been discussion here on SO already. In general it looks as though any "sub-delims" should be accepted with or without a value: https://www.rfc-editor.org/rfc/rfc3986#appendix-A
Truth is, it's too bad that the QUrlQuery doesn't have the option for a value-less query without a trailing equal sign
Related
Is it possible to use QUrlQuery to append data without striping the url?
Using the code bellow will strip everything after the "?" and
the result is:
https://foobar.com/Info.xml.aspx?userdata=1234
I would like to get:
https://foobar.com/Info.xml.aspx?user=jack&userdata=1234
QUrl url("https://foobar.com/Info.xml.aspx?user=jack&");
QString data = "1234";
QUrlQuery query;
query.addQueryItem("userdata", data);
url.setQuery(query);
I'm asking because i need to make multiple calls, every time adding a new parameter and "building" the url from scratch every time is annoying.
You have to get the query and then add the item:
QUrl url("https://foobar.com/Info.xml.aspx?user=jack&");
QString data = "1234";
QUrlQuery query(url.query());
query.addQueryItem("userdata", data);
url.setQuery(query);
qDebug()<<url;
Output:
QUrl("https://foobar.com/Info.xml.aspx?user=jack&userdata=1234")
I would like to add dynamic variables to an url example:
QNetworkRequest req( QUrl( QString("http://website.com/?test=1&id=1") ) );
But when i try this:
// the HTTP request
varUrl = "http://website.com/?test=";
varUrl += info;
varUrl += "&id=";
varUrl += info_2;
QNetworkRequest req( QUrl( QString(varUrl) ) );
QNetworkReply *reply = mgr.get(req);
eventLoop.exec(); // blocks stack until "finished()" has been called
i get this error:
The error message you posted is partly unrelated. Your actual problem is this:
QNetworkRequest req( QUrl( QString(varUrl) ) );
This is treated as a function declaration. This is a corner case in C++ and it's commonly referred to as the "most vexing parse". See https://en.wikipedia.org/wiki/Most_vexing_parse for an explanation.
In any event, use the QUrl::fromUserInput() static function instead of passing the query string directly. This will encode the query correctly (otherwise you'd need to manually encode the query correctly by hand.) So in short, change the above line to:
QNetworkRequest req(QUrl::fromUserInput(varUrl));
This also fixes the parsing issue; the above is treated correctly like a variable definition, not a function declaration, and your code should now compile fine.
As a side-note, you can use the QString::arg() function to construct your string in one go, without having to use append (+=) operations. So you can construct your URL string like this:
varUrl = QString("http://website.com/?test=%1&id=%2").arg(info).arg(info_2);
%1 will be replaced with the contents of info, and %2 with the contents of info_2.
According to the documentation:
The QUrlQuery class provides a way to manipulate a key-value pairs in
a URL's query.
It is used to parse the query strings found in URLs like the
following:
Posible solution is to use QUrlQuery:
QString info = "1";
QString info_2 = "1";
QUrl url("http://website.com/");
QUrlQuery query;
query.addQueryItem("test", info);
query.addQueryItem("id", info_2);
url.setQuery(query);
I have a line of code Where i want to set parameters which has a boolean value in aRequest. How do set it in qt c++?
else if(requestPath.startsWith("/internal/Services")){ // note URL is /internal/...
windowsservice().service(aRequest, aResponse)
}
With some assumptions about your code, try something like this:
auto url = aRequest.url();
QUrlQuery query{url};
query.addQueryItem("boolparam", "1");
url.setQuery(query);
aRequest.setUrl(url);
I'm a new User of POCO and could get HTTP response after HTTP::Request.
By the way, How do I create HTTP request with some parameters? For example, I want to set URI, http://xxxx/index.html?name=hoge&id=fuga&data=foo.
Of course I know it's possible if I set this uri directly. But I want to realize this like below. Does anyone know this way?
URI uri("http://xxx/index.html");
uri.setParam("name", "hoge");
uri.setParam("id", "fuga");
uri.setParam("data", "foo");
If you had looked up the documentation for Poco::URI, you'd see it's done with uri.addQueryParameter("name", "value"):
void addQueryParameter(
const std::string & param,
const std::string & val = ""
);
Adds "param=val" to the query; "param" may not be empty. If val is empty, only '=' is appended to the parameter.
In addition to regular encoding, function also encodes '&' and '=', if found in param or val.
You can also set all the parameters with setQueryParameters.
Unfortunately, Poco doesn't let you set the value of an existing query parameter (or remove it). If you want to do that, you have to clear the query portion of the URI and readd all the parameters you want with their values.
I have the next code to make a request:
void HTTPClient::post(QString connectionString, QHttpMultiPart* _multiPart, bool returnProgress) {
QUrl url;
if (ssl)
url.setScheme("https");
else
url.setScheme("http");
url.setHost(host);
url.setPort(port);
url.setPath(connectionString);
url.setUrl(url.toEncoded());
QNetworkRequest request(url);
request.setRawHeader("User-Agent", QCoreApplication::applicationName().toLatin1());
/*...irrelevant code...*/
}
The requested url should be
https://somewebpage.domain:443/REST/login.php?method=login_md5
but the QNetworkRequest requests this one despite I set the url as encoded (debugging url.toEncoded() prints the '?' correctly):
https://somewebpage.domain:443/REST/login.php%3Fmethod=login_md5
This results in a 404 not found page. I have tried setting the url with url.toString() and just url, but the '?' keeps messing up. What can I do to request the link properly?
I have tried building the QUrl in the constructor like this:
QUrl url("https://"+host+port+connectionString);
But results in the next string:
https://somewebpage.xn--domain-efa/REST/login.php?method=login_md5
You can try QUrl::fromEncoded
url.setUrl( QUrl::fromPercentEncoding(url.toEncoded()));
Parses input and returns the corresponding QUrl. input is assumed to
be in encoded form, containing only ASCII characters.
to correctly handle characters.
The encoded URL seems valid, maybe a problem with your webserver?
You can setPath() and setQuery() separatly. What come before the '?' is the path and after is the query arguments.
const QStringList path_part = path.split('?');
url.setPath(path_part.at(0));
if(path_part.size() > 1)
url.setQuery(path_part.at(1));