On 18.02.2019 13:11, Sven-Meikel Auer via curl-library wrote:
Hello to all of you,
I'm new here and have my first problem where I can't get any further.
My problem is that when the following code is executed the application
terminates with "SIGSEGV | Segmentation fault".
The failure is on this line - says the debugger:
curl_easy_setopt(curl, CURLOPT_URL, "https://www.google.com";);
What am I doing wrong?
A nice week. I wish you all the best.
Greetings from
Sven
Here my code that I have found on the internet - but It dosen't work:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <curl/curl.h>
#include <string>
#include <sstream>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream) {
std::string data((const char*) ptr, (size_t) size * nmemb);
*((std::stringstream*) stream) << data << std::endl;
return size * nmemb;
}
void MainWindow::on_pushButton_clicked()
{
// CURL IN ACTION
CURL *curl;
curl_easy_setopt(curl, CURLOPT_URL, "https://www.google.com";);
std::stringstream out;
out.clear();
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &out);
/* Perform the request, res will get the return code */
CURLcode res = curl_easy_perform(curl);
/* Check for errors */
if (res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
}
// Now I can make further processing with:
// out.str();
curl_easy_cleanup(curl);
curl_global_cleanup();
}
Hi.
You are missing the curl_easy_init() (and the curl_global_init(), but
easy_init will do that if you don't).
Take a look at this simple example:
https://curl.haxx.se/libcurl/c/getinmemory.html
--
mvh
Chris Carlmar
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