I have installed the cygwin64 on windows 10, also there are installed the g++ and the libraries of libCurl. When I run the code the g++ compiler throw me this error '#error Only Win32 target is supported!'.
How I solve this error?
Have I to install another version or library?
TestCurl.cpp
#include <iostream>
#include <string>
#include <curl/curl.h>
static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
((std::string*)userp)->append((char*)contents, size * nmemb);
return size * nmemb;
}
int main(void)
{
CURL *curl;
CURLcode res;
std::string readBuffer;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
std::cout << readBuffer << std::endl;
}
return 0;
}
MakeFile
CC=g++
MIN_GW = C:\cygwin64\usr\x86_64-w64-mingw32\sys-root\mingw\include
all: call.o
call.o: call.cpp
$(CC) call.cpp -o call -I$(MIN_GW)
Error
Errorlog
Related
I have project with curl but size my file 720KB. This is a lot for me. I am use curl only for smtp, how i can reduce my file. I tried use defines discribed in CURL-DISABLE.md but that not worked, i think i configured them incorrectly. Can you give me instruction how i can reduce curl? My code of program.
#include <iostream>
#include <windows.h>
#define CURL_STATICLIB
#include "curl/curl.h"
#pragma comment(lib, "libcurl_a.lib")
static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
((std::string*)userp)->append((char*)contents, size * nmemb);
return size * nmemb;
}
int main(void)
{
CURL *curl;
CURLcode res;
std::string readBuffer;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://google.com");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
std::cout << readBuffer << std::endl;
}
return 0;
}
It work but a lot of size. SCREEN_OF_FILE_IN_PATH
I've got a short C++ program to download a file with curl.
I can compile it with:
gcc main.cpp -L/usr/include/x86_64-linux-gnu/curl -lcurl
but when I try it to compile for my arm-development board with the command:
arm-linux-gnueabihf-gcc main.cpp -I/usr/include/x86_64-linux-gnu -L/usr/include/x86_64-linux-gnu/curl -lcurl
I got an error, that lcurl cannot be found.
Can somebody tell me how to compile my program the right way or how to install curl for arm on my Linux-Ubuntu-Machine
#include <curl/curl.h>
size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
size_t written = fwrite(ptr, size, nmemb, stream);
return written;
}
int main()
{
CURL *curl;
FILE *fp;
CURLcode res;
char *url = "...url...";
char outfilename[FILENAME_MAX] = "/home/test.txt";
curl = curl_easy_init();
if (curl)
{
fp = fopen(outfilename,"wb");
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
res = curl_easy_perform(curl);
// always cleanup
curl_easy_cleanup(curl);
fclose(fp);
}
return( 0 );
}
downloaded precompiled libcurl from github, linked library to project and included header file and i'm trying to run simple code
#include <iostream>
#include <string>
#include <curl/curl.h>
static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
((std::string*)userp)->append((char*)contents, size * nmemb);
return size * nmemb;
}
int main(void)
{
CURL *curl;
CURLcode res;
std::string readBuffer;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
std::cout << readBuffer << std::endl;
}
return 0;
}
but i'm receiving errors
undefined reference to _imp__curl_easy_init
undefined reference to _imp__curl_easy_setopt
undefined reference to _imp__curl_easy_perform
undefined reference to _imp__curl_easy_cleanup
can anyone help me? i'm on windows 10 and using codeblocks 17
You should add this define before including curl:
#define CURL_STATICLIB
It seems like you're statically linking to curl, but curl requires to be told about this in order for it to expose the implementation.
#include <stdio.h>
#include <iostream>
#include <thread>
#include <stdlib.h>
#include <string>
#include <sstream>
#include <array>
#include <curl/curl.h>
size_t WriteCallback(char *contents, size_t size, size_t nmemb, void *userp)
{
((std::string*)userp)->append((char*)contents, size * nmemb);
return size * nmemb;
}
int main(int argc, char * argv[])
{
curl_global_init(CURL_GLOBAL_ALL);
CURL* easyhandle = curl_easy_init();
std::string readBuffer;
curl_easy_setopt(easyhandle, CURLOPT_URL, "http://192.168.1.79:8080");
curl_easy_setopt(easyhandle, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(easyhandle, CURLOPT_POST, 1);
curl_easy_setopt(easyhandle, CURLOPT_POSTFIELDS,"{ \"jsonrpc\": \"2.0\", \"method\": \"get\", \"params\": [\"Frozen\"], \"id\": 3}");
curl_easy_setopt(easyhandle, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(easyhandle, CURLOPT_WRITEDATA, &readBuffer);
curl_easy_perform(easyhandle);
std::cout << readBuffer << std::endl;
//std::cout << "{ \"jsonrpc\": \"2.0\", \"method\": \"getTitles\", \"params\": [clea], \"id\": 3}" << std::endl;
return 0;
}
Here is my code for my curl command. I see the request come through on my server but it keeps saying rpc error. I think it is the way i am formatting my json. Basically on my pc if I run this curl command in terminal it works. However, running it in c++ is not working.
Turns out "Frozen" was not in the library. After adding it on the server it worked.
In my program, I want to download a few files. So I took cURL and used this code (taken and modified a little bit from here Download file using libcurl in C/C++):
#include "curl.h"
using namespace std;
size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
size_t written;
written = fwrite(ptr, size, nmemb, stream);
return written;
}
int DlZip(){
CURL *curl;
FILE *fp;
CURLcode res;
string url = "http://wordpress.org/extend/plugins/about/readme.txt";
char outfilename[FILENAME_MAX] = "/Users/Me/Desktop/bbb.txt";
curl = curl_easy_init();
if (curl) {
fp = fopen(outfilename,"wb");
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
fclose(fp);
}
return 0;
}
But nothing happened and there weren't any file on my desktop :-/
What is the problem with my code?
Or if you have a simple function to use, could you give me ?
Thanks!
Check Below code
#include <cstdio>
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
#include <string>
using namespace std;
size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
size_t written;
written = fwrite(ptr, size, nmemb, stream);
return written;
}
int main(){
CURL *curl;
FILE *fp;
CURLcode res;
string url = "http://www.joes-hardware.com/tools.html";
char outfilename[FILENAME_MAX] = "./MyText.txt";
curl = curl_easy_init();
if (curl) {
fp = fopen(outfilename,"wb");
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
fclose(fp);
}
return 0;
}
It works fine.
The problem is - this code is not able to use https and hence when the url provided by you when opened in browser and through above code - produce separate responses.